Filed Pursuant to Rule 424(b)(2)
File No. 333-282226

The information in this preliminary prospectus supplement is not complete and may be changed. An effective registration statement relating to these securities has been filed with the U.S. Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any state or jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED NOVEMBER 13, 2024

PRELIMINARY PROSPECTUS SUPPLEMENT

To the Prospectus dated September 19, 2024

$    

   % Notes due     

We are offering for sale $    in aggregate principal amount of  % Notes due    , which we refer to as the Notes. The Notes will mature on     ,  . We will pay interest on the Notes semi-annually in arrears on     and     of each year, beginning on     , 2025. We may redeem the Notes in whole or in part at any time, or from time to time, at the applicable redemption price discussed under the caption “Specific Terms of the Notes and the Offering—Optional Redemption” in this prospectus supplement. In addition, holders of the Notes can require us to repurchase some or all of the Notes at a purchase price equal to 100% of their principal amount, plus accrued and unpaid interest to, but not including, the repurchase date upon the occurrence of a Change of Control Repurchase Event (as defined herein). The Notes will be issued in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The Notes will be our general unsecured obligations that rank senior in right of payment to all of our existing and future indebtedness that is expressly subordinated in right of payment to the Notes, rank pari passu with all existing and future unsecured unsubordinated indebtedness issued by us, rank effectively junior to any of our secured indebtedness (including unsecured indebtedness that we later secure) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by our subsidiaries, financing vehicles or similar facilities. None of our current indebtedness is subordinated to the Notes and we do not presently expect to issue any such subordinated debt.

We are an externally managed, non-diversified, closed-end management investment company that has elected to be regulated as a business development company, or BDC, under the Investment Company Act of 1940, as amended, or the 1940 Act. Our investment objectives are to generate current income and, to a lesser extent, long-term capital appreciation. Our investments and activities are managed by FS/KKR Advisor, LLC, or the Adviser, a registered investment adviser under the Investment Advisers Act of 1940, as amended, or the Advisers Act, that is jointly operated by an affiliate of Franklin Square Holdings, L.P., or FS Investments, and by KKR Credit Advisors (US) LLC, or KKR Credit.

We invest in securities that are rated below investment grade by rating agencies or that would be rated below investment grade if they were rated. Below investment grade securities, which are often referred to as “junk,” have predominantly speculative characteristics with respect to the issuer’s capacity to pay interest and repay principal. They may also be difficult to value and illiquid.

Investing in our securities may be considered speculative and involves a high degree of risk, including the risk of a substantial loss of investment. See “Risk Factors” beginning on page S-7 of this prospectus supplement and page 14 of the accompanying prospectus, in our most recent Annual Report on Form 10-K, and in any of our other filings with the Securities and Exchange Commission, or SEC, incorporated by reference herein to read about the risks you should consider before buying our securities, including the risk of leverage.

This prospectus supplement, the accompanying prospectus, and any related free writing prospectus, and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus, contain important information about us that a prospective investor should know before investing in our securities. Please read this prospectus supplement, the accompanying prospectus, and any related free writing prospectus, and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus, before investing and keep them for future reference. We file annual, quarterly and current reports, proxy statements and other information about us with the SEC. This information is available free of charge by contacting us at 201 Rouse Boulevard, Philadelphia, Pennsylvania 19112, by calling us collect at (215) 495-1150 or by visiting our website at www.fskkradvisor.com/fsk. Information contained on our website is not incorporated by reference into this prospectus supplement or the accompanying prospectus, and you should not consider that information to be part of this prospectus supplement or the accompanying prospectus. The contact information provided above may be used by you to make investor inquiries. The SEC also maintains a website at www.sec.gov that contains such information.

Neither the SEC nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

THE NOTES ARE NOT DEPOSITS OR OTHER OBLIGATIONS OF A BANK AND ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT AGENCY.

Delivery of the Notes in book-entry form through The Depository Trust Company, or DTC, will be made on or about     , 2024.

Joint Book-Running Managers

The date of this prospectus supplement is     , 2024.

You should rely only on the information contained in this prospectus supplement, the accompanying prospectus, any free writing prospectus, and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus, or any other information which we have referred you when considering whether to purchase any securities offered by this prospectus supplement. We have not, and the underwriters have not, authorized any other person to provide you with different or additional information from that contained in this prospectus supplement, the accompanying prospectus, or any free writing prospectus. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted.

This document is in two parts. The first part is this prospectus supplement, which describes the terms of this offering and also adds to and updates information contained in the accompanying prospectus. The second part is the accompanying prospectus, which gives more general information and disclosure. To the extent the information contained in this prospectus supplement differs from the information contained in the accompanying prospectus, the information in this prospectus supplement shall control. The information contained in this prospectus supplement, the accompanying prospectus, and any free writing prospectuses is complete and accurate only as of their respective dates. Our business, financial condition, results of operations and prospects may have changed since those dates. If there is a material change in our affairs, we will amend or supplement this prospectus supplement only as required by law.

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TABLE OF CONTENTS

PROSPECTUS SUPPLEMENT

PROSPECTUS

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RISK FACTORS

Investing in our securities involves a number of significant risks, including risks related to the Notes. In addition to the other information contained in this prospectus supplement, the accompanying prospectus, and any free writing prospectus, you should consider carefully the following information and the risk factors incorporated by reference in our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K we file after the date of this prospectus supplement, and all other information contained or incorporated by reference into this prospectus supplement, the accompanying prospectus, and any free writing prospectus, as updated by our subsequent filings under the Exchange Act, before making an investment in our securities. Additional risks and uncertainties not presently known to us or not presently deemed material by us may also impair our operations and performance. Each of the risk factors could materially and adversely affect our business, financial condition and results of operations. In such case, our net asset value and the value of our debt securities may decline, and investors may lose all or part of their investment.

Risks Related to the Notes

The Notes are unsecured and therefore are effectively subordinated to any secured indebtedness we may incur.

The Notes are not secured by any of our assets or any of the assets of our subsidiaries. As a result, the Notes are effectively subordinated to any secured indebtedness we or our subsidiaries have outstanding as of the date of this prospectus supplement or that our subsidiaries may incur in the future (or any indebtedness that is initially unsecured in respect of which we subsequently grant security) to the extent of the value of the assets securing such indebtedness. In any liquidation, dissolution, bankruptcy or other similar proceeding, the holders of any of our existing or future secured indebtedness and the secured indebtedness of our subsidiaries may assert rights against the assets pledged to secure that indebtedness in order to receive full payment of their indebtedness before the assets may be used to pay other creditors, including the holders of the Notes. As of September 30, 2024, our total consolidated indebtedness was approximately $8.1 billion, approximately $2.5 billion of which was secured.

The Notes are subordinated structurally to the indebtedness and other liabilities of our subsidiaries.

The Notes are obligations exclusively of FS KKR Capital Corp. and not of any of our subsidiaries. None of our subsidiaries is a guarantor of the Notes and the Notes are not required to be guaranteed by any subsidiaries we may acquire or create in the future. As of September 30, 2024, approximately $1.7 billion of the indebtedness required to be consolidated on our balance sheet was held through subsidiary financing vehicles and secured by certain assets of such subsidiaries. Except to the extent we are a creditor with recognized claims against our subsidiaries, all claims of creditors, including trade creditors, and holders of preferred stock, if any, of our subsidiaries will have priority over our claims (and therefore the claims of our creditors, including holders of the Notes) with respect to the assets of such subsidiaries. Even if we were recognized as a creditor of one or more of our subsidiaries, our claims would still be effectively subordinated to any security interests in the assets of any such subsidiary and to any indebtedness or other liabilities of any such subsidiary senior to our claims. Consequently, the Notes are subordinated structurally to all indebtedness and other liabilities of any of our subsidiaries and any subsidiaries that we may in the future acquire or establish as financing vehicles or otherwise. All of the existing indebtedness of our subsidiaries is structurally senior to the Notes. In addition, our subsidiaries may incur substantial additional indebtedness in the future, all of which would be structurally senior to the Notes.

Our amount of debt outstanding may increase as a result of this offering. Our current indebtedness could adversely affect our business, financial condition and results of operations and our ability to meet our payment obligations under the Notes and our other debt.

The use of debt could have significant consequences on our future operations, including:

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Any of the above-listed factors could have an adverse effect on our business, financial condition and results of operations and our ability to meet our payment obligations under the Notes and our other debt.

Our ability to meet our payment and other obligations under our financing arrangements depends on our ability to generate significant cash flow in the future. This, to some extent, is subject to general economic, financial, competitive, legislative and regulatory factors as well as other factors that are beyond our control. We cannot assure you that our business will generate cash flow from operations, or that future borrowings will be available to us under our financing arrangements or otherwise, in an amount sufficient to enable us to meet our payment obligations under the Notes and our other debt and to fund other liquidity needs. If we are not able to generate sufficient cash flow to service our debt obligations, we may need to refinance or restructure our debt, including the Notes, sell assets, reduce or delay capital investments, or seek to raise additional capital. If we are unable to implement one or more of these alternatives, we may not be able to meet our payment obligations under the Notes and our other debt.

A downgrade, suspension or withdrawal of the credit rating assigned by a rating agency to us or the Notes, if any, could cause the liquidity or market value of the Notes to decline significantly.

Our credit ratings are an assessment by rating agencies of our ability to pay our debts when due. Consequently, real or anticipated changes in our credit ratings will generally affect the market value of the Notes. These credit ratings may not reflect the potential impact of risks relating to the structure or marketing of the Notes. Credit ratings are not a recommendation to buy, sell or hold any security, and may be revised or withdrawn at any time by the issuing organization in its sole discretion. Neither we nor any underwriter undertakes any obligation to maintain our credit ratings or to advise holders of the Notes of any changes in our credit ratings.

The Notes are rated by Moody’s Investors Service, or Moody’s, Fitch Ratings, or Fitch, and Kroll Bond Rating Agency, or Kroll. There can be no assurance that their respective credit ratings will remain for any given period of time or that such credit ratings will not be lowered or withdrawn entirely by Moody’s, Fitch or Kroll if in any of their respective judgments future circumstances relating to the basis of the credit rating, such as adverse changes in our business, financial condition and results of operations, so warrant.

An increase in market interest rates could result in a decrease in the market value of the Notes.

The condition of the financial markets and prevailing interest rates have fluctuated in the past and are likely to fluctuate in the future, which could have an adverse effect on the market prices of the Notes. In general, as market interest rates rise, debt securities bearing interest at fixed rates of interest decline in value. Consequently, if you purchase Notes bearing interest at fixed rates and market interest rates increase, the market values of those Notes may decline. We cannot predict the future level of market interest rates.

The indenture governing the Notes contains limited protection for holders of the Notes.

The indenture governing the Notes offers limited protection to holders of the Notes. The terms of the indenture and the Notes do not restrict our or any of our subsidiaries’ ability to engage in, or otherwise be a party

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to, a variety of corporate transactions, circumstances or events that could have an adverse impact on your investment in the Notes. In particular, the terms of the indenture and the Notes do not place any restrictions on our or our subsidiaries’ ability to:

In addition, the terms of the indenture and the Notes do not protect holders of the Notes in the event that we experience changes (including significant adverse changes) in our financial condition, results of operations or credit ratings, as they do not require that we or our subsidiaries adhere to any financial tests or ratios or specified levels of net worth, revenues, income, cash flow or liquidity other than as described under “Description of the Notes—Events of Default” in this prospectus supplement.

Our ability to recapitalize, incur additional debt and take a number of other actions are not limited by the terms of the Notes and may have important consequences for you as a holder of the Notes, including making it more difficult for us to satisfy our obligations with respect to the Notes or negatively affecting the trading value of the Notes.

Other debt we issue or incur in the future could contain more protections for its holders than the indenture and the Notes, including additional covenants and events of default. See “Risk Factors—Risks Related to Debt Financing—We currently incur indebtedness to make investments, which magnifies the potential for gain or loss on amounts invested in our common stock and may increase the risk of investing in our common stock” in our most recent Annual Report on Form 10-K. The issuance or incurrence of any such debt with incremental protections could affect the market for and trading levels and prices of the Notes.

The optional redemption provision may materially adversely affect your return on the Notes.

The Notes are redeemable in whole or in part upon certain conditions at any time or from time to time at our option. We may choose to redeem the Notes at times when prevailing interest rates are lower than the interest rate paid on the Notes. In this circumstance, you may not be able to reinvest the redemption proceeds in a comparable security at an effective interest rate as high as the Notes being redeemed.

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There is currently no public market for the Notes, and we cannot assure you that an active trading market for the Notes will develop. If an active trading market for the Notes does not develop or is not maintained, you may not be able to sell them.

The Notes are a new issue of debt securities for which there currently is no trading market. If no active trading market develops and is maintained for the Notes, you may not be able to resell your Notes at their fair market value or at all. We do not currently intend to apply for listing of the Notes on any securities exchange or for quotation of the Notes on any automated dealer quotation system. If the Notes are traded after their initial issuance, they may trade at a discount from their initial offering price depending on prevailing interest rates, the market for similar securities, our credit ratings, general economic conditions, our financial condition, performance and prospects and other factors. Certain of the underwriters have advised us that they intend to make a market in the Notes, but they are not obligated to do so. The underwriters may discontinue any market- making in the Notes at any time at their sole discretion. Accordingly, we cannot assure you that an active and liquid trading market will develop or continue for the Notes, that you will be able to sell your Notes at a particular time or that the price you receive when you sell will be favorable. To the extent an active trading market is not developed and maintained for the Notes, the liquidity and trading price for the Notes may be harmed. Accordingly, you may be required to bear the financial risk of an investment in the Notes for an indefinite period of time.

We may not be able to repurchase the Notes upon a Change of Control Repurchase Event.

We may not be able to repurchase the Notes upon a Change of Control Repurchase Event because we may not have sufficient funds. Upon a Change of Control Repurchase Event, holders of the Notes may require us to repurchase for cash some or all of the Notes at a repurchase price equal to 100% of the aggregate principal amount of the Notes being repurchased, plus accrued and unpaid interest to, but not including, the repurchase date. Our failure to purchase such tendered Notes upon the occurrence of such Change of Control Repurchase Event would cause an event of default under the indenture governing the Notes and a cross-default under the agreements governing certain of our other indebtedness, which may result in the acceleration of such indebtedness requiring us to repay that indebtedness immediately. In addition, the indenture governing the 4.125% Notes due 2025, the indenture governing the 4.250% Notes due 2025, the indenture governing the 8.625% Notes due 2025, the indenture governing the 3.400% Notes due 2026, the indenture governing the 2.625% Notes due 2027, the indenture governing the 3.250% Notes due 2027, the indenture governing the 3.125% Notes due 2028, the indenture governing the 7.875% Notes due 2029, and the indenture governing the 6.875% notes due 2029 (each, an “Existing Note,” and collectively, the “Existing Notes”) each contain similar restrictions and provisions that would require us, subject to certain conditions, to offer to repurchase each Existing Note upon the occurrence of certain change of control events. Our failure to purchase any tendered Existing Note, as applicable, would cause an event of default under the respective indenture governing such notes. If a Change of Control Repurchase Event were to occur, we may not have sufficient funds to repay any such accelerated indebtedness and/or to make the required repurchase of the Notes or the Existing Notes. See “Description of the Notes—Offer to Repurchase Upon a Change of Control Repurchase Event” in this prospectus supplement for additional information.

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USE OF PROCEEDS

We estimate that net proceeds we will receive from the sale of the Notes in this offering will be approximately $    million, after deducting the underwriting discounts and commissions of approximately $    million payable by us and estimated offering expenses of approximately $    payable by us.

We intend to use the net proceeds of this offering for general corporate purposes, including potentially repaying outstanding indebtedness under our credit facilities and certain notes. See “Underwriting—Other Relationships” in this prospectus supplement for additional information regarding potential payments to underwriters or their affiliates.

As of September 30, 2024, our total consolidated indebtedness was approximately $8.1 billion, approximately $2.5 billion of which was secured indebtedness, all of which was senior indebtedness, and approximately $1.7 billion of which was indebtedness of our subsidiaries.

Below is a summary of our outstanding financing arrangements as of September 30, 2024 (dollar amounts are presented in millions):

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CAPITALIZATION

The following table sets forth our cash and capitalization as of September 30, 2024:

(1) on an actual basis; and

(2) on an as adjusted basis giving effect to the offering of the Notes.

You should read this table together with “Use of Proceeds” set forth in this prospectus supplement and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and related notes thereto included in our most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q.

Dollar amounts are presented in millions.

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SENIOR SECURITIES

Information about our senior securities (including debt securities and other indebtedness) is shown in the table below as of September 30, 2024 and December 31, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015 and 2014. The information as of September 30, 2024 has been derived from our unaudited financial statements for such period. The information as of December 31, 2023, 2022, 2021, 2020 and 2019 has been derived from our audited financial statements for such period, which have been audited by Deloitte & Touche LLP, our independent registered public accounting firm as of such date. The information as of December 31, 2018, 2017, 2016, 2015, and 2014 has been derived from our audited financial statements for these periods, which have been audited by RSM US LLP, our independent registered public accounting firm as of such dates.

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DESCRIPTION OF THE NOTES

The following description of the particular terms of the  % Notes due    supplements and, to the extent inconsistent with, replaces the description of the general terms and provisions of the debt securities set forth in the accompanying prospectus.

We will issue the Notes under the base indenture between us and U.S. Bank Trust Company, National Association (as successor-in-interest to U.S. Bank National Association), as trustee, dated as of July 14, 2014, as supplemented by a separate supplemental indenture between us and the trustee to be dated as of the settlement date for the Notes. As used in this section, all references to the indenture mean the base indenture as supplemented by the supplemental indenture. The terms of the Notes include those expressly set forth in the indenture and those made part of the indenture by reference to the Trust Indenture Act of 1939, as amended.

The following description is a summary of the material provisions of the Notes and the indenture and does not purport to be complete. This summary is subject to and is qualified by reference to all the provisions of the Notes and the indenture, including the definitions of certain terms used in the indenture. We urge you to read these documents because they, and not this description, define your rights as a holder of the Notes. You may request a copy of the indenture from us by making a written request to FS KKR Capital Corp., 201 Rouse Boulevard, Philadelphia, Pennsylvania 19112 or by calling us at (215) 495-1150. In addition, the SEC maintains a website at www.sec.gov that contains information we file with the SEC, including the indenture.

For purposes of this description, references to “we,” “our” and “us” refer only to FS KKR Capital Corp. and not to any of its current or future subsidiaries and references to “subsidiaries” refer only to our consolidated subsidiaries and exclude any investments held by FS KKR Capital Corp. in the ordinary course of business which are not, under GAAP, consolidated on the financial statements of FS KKR Capital Corp. and its subsidiaries.

General

The Notes:

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The indenture does not limit the amount of debt that may be issued by us or our subsidiaries under the indenture or otherwise. The indenture does not contain any financial covenants and does not restrict us from paying dividends or distributions or issuing or repurchasing our other securities. Other than restrictions described under “Offer to Repurchase Upon a Change of Control Repurchase Event” and “Covenants—Merger, Consolidation or Sale of Assets” in this prospectus supplement, the indenture does not contain any covenants or other provisions designed to afford holders of the Notes protection in the event of a highly leveraged transaction involving us or in the event of a decline in our credit rating as the result of a takeover, recapitalization, highly leveraged transaction or similar restructuring involving us that could adversely affect such holders.

We may, without the consent of the holders, issue additional Notes under the indenture with the same terms (except for the issue date, public offering price, and, if applicable, the initial interest payment date) as the Notes offered hereby in an unlimited aggregate principal amount; provided that, if such additional Notes are not fungible with the Notes offered hereby (or any other tranche of additional Notes) for U.S. federal income tax purposes, then such additional Notes will have different CUSIP numbers from the Notes offered hereby (and any such other tranche of additional Notes).

We do not intend to list the Notes on any securities exchange or any automated dealer quotation system.

Payments on the Notes; Paying Agent and Registrar; Transfer and Exchange

We will pay the principal of, and interest on, Notes in global form registered in the name of or held by DTC or its nominee in immediately available funds to DTC or its nominee, as the case may be, as the registered holder of such Global Note (as defined below).

Payment of principal of (and premium, if any) and any such interest on the Notes will be made at the corporate trust office of the trustee in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that at our option payment of interest may be made by check mailed to the address of the person entitled thereto as such address shall appear in the security register.

A holder of Notes may transfer or exchange Notes at the office of the security registrar in accordance with the indenture. The security registrar and the trustee may require a holder, among other things, to furnish appropriate endorsements and transfer documents. No service charge will be imposed by us, the trustee or the security registrar for any registration of transfer or exchange of Notes, but we may require a holder to pay a sum sufficient to cover any transfer tax or other similar governmental charge required by law or permitted by the indenture.

The registered holder of a Note will be treated as its owner for all purposes.

Interest

The Notes will bear cash interest at a rate of    % per year until maturity. Interest on the Notes will accrue from    , 2024. Interest will be payable semiannually in arrears on    and    of each year, beginning on    , 2025.

Interest will be paid to the person in whose name a Note is registered at 5:00 p.m. New York City time, or the close of business, on    or    , as the case may be, immediately preceding the relevant interest payment date. Interest on the Notes will be computed on the basis of a 360-day year composed of twelve 30-day months.

If any interest payment date, redemption date, the maturity date or any earlier required repurchase date upon a Change of Control Repurchase Event (defined below) of a Note falls on a day that is not a business day, the

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required payment will be made on the next succeeding business day and no interest on such payment will accrue in respect of the delay. The term “business day” means, with respect to any Note, any day other than a Saturday, a Sunday or a day on which banking institutions in New York or the city in which the corporate trust office is located are authorized or obligated by law or executive order to close.

Ranking

The Notes will be our general unsecured obligations that rank senior in right of payment to all of our existing and future indebtedness that is expressly subordinated in right of payment to the Notes. The Notes rank equally in right of payment with all of our existing and future liabilities that are not so subordinated. The Notes will rank effectively junior to any of our secured indebtedness (including unsecured indebtedness that we later secure) to the extent of the value of the assets securing such indebtedness. The Notes will rank structurally junior to all existing and future indebtedness (including trade payables) incurred by our subsidiaries, financing vehicles or similar facilities. In the event of our bankruptcy, liquidation, reorganization or other winding up, our assets that secure secured debt will be available to pay obligations on the Notes only after all indebtedness under such secured debt has been repaid in full from such assets. We advise you that there may not be sufficient assets remaining to pay amounts due on any or all the Notes then outstanding.

As of September 30, 2024, our total consolidated indebtedness was approximately $8.1 billion, approximately $2.5 billion of which was secured indebtedness, all of which was senior indebtedness, and approximately $1.7 billion of which was indebtedness of our subsidiaries.

Optional Redemption

Prior to  ,  (  month(s) prior to their maturity date) (the “Par Call Date”), we may redeem the Notes at our option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of:

plus, in either case, accrued and unpaid interest thereon to the redemption date.

On or after the Par Call Date, we may redeem the Notes, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the Notes being redeemed plus accrued and unpaid interest thereon to the redemption date.

“Treasury Rate” means, with respect to any redemption date, the yield determined by the Company in accordance with the following two paragraphs.

The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day preceding the redemption date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily)—H.15” (or any successor designation or publication) (“H.15”) under the caption “U.S. government securities–Treasury constant maturities–Nominal” (or any successor caption or heading). In determining the Treasury Rate, the Company shall select, as applicable: (1) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the redemption date to the Par Call Date (the “Remaining Life”); or (2) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields – one yield corresponding to the Treasury constant

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maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining Life – and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (3) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date.

If on the third business day preceding the redemption date H.15 or any successor designation or publication is no longer published, the Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

Our actions and determinations in determining the redemption price shall be conclusive and binding for all purposes, absent manifest error.

If we choose to redeem any Notes, we will deliver a notice of redemption to holders of the Notes not less than 10 nor more than 60 days before the redemption date. If we are redeeming less than all of the Notes, the particular Notes to be redeemed will be selected in accordance with the applicable procedures of the trustee and, so long as the Notes are registered to DTC or its nominee, DTC; provided, however, that no such partial redemption shall reduce the portion of the principal amount of a Note not redeemed to less than $2,000. Unless we default in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the Notes or portions of the Notes called for redemption.

Offer to Repurchase Upon a Change of Control Repurchase Event

If a Change of Control Repurchase Event occurs, unless we have exercised our right to redeem the Notes in full, we will make an offer to each holder of the Notes to repurchase all or any part (in minimum denominations of $2,000 and integral multiples of $1,000 principal amount in excess thereof) of that holder’s Notes at a repurchase price in cash equal to 100% of the aggregate principal amount of Notes repurchased plus any accrued and unpaid interest on the Notes repurchased to, but not including, the date of purchase. Within 30 days following any Change of Control Repurchase Event or, at our option, prior to any Change of Control, but after the public announcement of the Change of Control, we will mail a notice to each holder describing the transaction or transactions that constitute or may constitute the Change of Control Repurchase Event and offering to repurchase Notes on the payment date specified in the notice, which date will be no earlier than 30 days and no later than 60 days from the date such notice is mailed. The notice shall, if mailed prior to the date of consummation of the Change of Control, state that the offer to purchase is conditioned on the Change of Control Repurchase Event occurring on or prior to the payment date specified in the notice. We will comply with the requirements of Rule 14e-1 promulgated under the Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with the repurchase of the Notes

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as a result of a Change of Control Repurchase Event. To the extent that the provisions of any securities laws or regulations conflict with the Change of Control Repurchase Event provisions of the Notes, we will comply with the applicable securities laws and regulations and will not be deemed to have breached our obligations under the Change of Control Repurchase Event provisions of the Notes by virtue of such conflict.

On the Change of Control Repurchase Event payment date, subject to extension if necessary to comply with the provisions of the 1940 Act and the rules and regulations promulgated thereunder, we will, to the extent lawful:

The paying agent will promptly remit to each holder of Notes properly tendered the purchase price for the Notes, and the trustee will promptly authenticate and mail (or cause to be transferred by book-entry) to each holder a new Note equal in principal amount to any unpurchased portion of any Notes surrendered; provided that each new Note will be in a minimum principal amount of $2,000 or an integral multiple of $1,000 in excess thereof.

We will not be required to make an offer to repurchase the Notes upon a Change of Control Repurchase Event if a third party makes an offer in the manner, at the times and otherwise in compliance with the requirements for an offer made by us and such third party purchases all Notes properly tendered and not withdrawn under its offer.

The source of funds that will be required to repurchase Notes in the event of a Change of Control Repurchase Event will be our available cash or cash generated from our operations or other potential sources, including funds provided by a purchaser in the Change of Control transaction, borrowings, sales of assets or sales of equity. We cannot assure you that sufficient funds from such sources will be available at the time of any Change of Control Repurchase Event to make required repurchases of Notes tendered. The terms of certain of our and our subsidiaries’ financing arrangements provide that certain change of control events will constitute an event of default thereunder entitling the lenders to accelerate any indebtedness outstanding under our and our subsidiaries’ financing arrangements at that time and to terminate the financing arrangements. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Financial Condition, Liquidity and Capital Resources” in our most recent Quarterly Report on Form 10-Q for a general discussion of our and our subsidiaries’ indebtedness. Our and our subsidiaries’ future financing arrangements may contain similar restrictions and provisions. If the holders of the Notes exercise their right to require us to repurchase Notes upon a Change of Control Repurchase Event, the financial effect of this repurchase could cause a default under our and our subsidiaries’ future financing arrangements, even if the Change of Control Repurchase Event itself would not cause a default. It is possible that we will not have sufficient funds at the time of the Change of Control Repurchase Event to make the required repurchase of the Notes and/or our and our subsidiaries’ other debt. See “Risk Factors—Risks Related to the Notes—We may not be able to repurchase the Notes upon a Change of Control Repurchase Event” in this prospectus supplement for more information.

The definition of “Change of Control” includes a phrase relating to the direct or indirect sale, transfer, conveyance or other disposition of “all or substantially all” of our properties or assets and those of our subsidiaries taken as a whole. Although there is a limited body of case law interpreting the phrase “substantially all,” there is no precise, established definition of the phrase under applicable law. Accordingly, the ability of a holder of Notes to require us to repurchase the Notes as a result of a sale, transfer, conveyance or other disposition of less than all of our assets and the assets of our subsidiaries taken as a whole to another person or group may be uncertain.

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For purposes of the Notes:

“Below Investment Grade Rating Event” means the Notes are downgraded below Investment Grade by both of the Rating Agencies on any date from the date of the public notice of an arrangement that results in a Change of Control until the end of the 60-day period following public notice of the occurrence of a Change of Control (which period shall be extended so long as the rating of the Notes is under publicly announced consideration for possible downgrade by either of the Rating Agencies); provided that a Below Investment Grade Rating Event otherwise arising by virtue of a particular reduction in rating shall not be deemed to have occurred in respect of a particular Change of Control (and thus shall not be deemed a Below Investment Grade Rating Event for purposes of the definition of Change of Control Repurchase Event hereunder) if the Rating Agencies making the reduction in rating to which this definition would otherwise apply do not announce or publicly confirm or inform the trustee in writing at its request that the reduction was the result, in whole or in part, of any event or circumstance comprised of or arising as a result of, or in respect of, the applicable Change of Control (whether or not the applicable Change of Control shall have occurred at the time of the Below Investment Grade Rating Event).

“Change of Control” means the occurrence of any of the following:

“Change of Control Repurchase Event” means the occurrence of a Change of Control and a Below Investment Grade Rating Event.

“Controlled Subsidiary” means any subsidiary of FS KKR Capital Corp., 50% or more of the outstanding equity interests of which are owned by FS KKR Capital Corp. and its direct or indirect subsidiaries and of which FS KKR Capital Corp. possesses, directly or indirectly, the power to direct or cause the direction of the management or policies, whether through the ownership of voting equity interests, by agreement or otherwise.

“Fitch” means Fitch Ratings, Inc., also known as Fitch Ratings, or any successor thereto.

“Investment Grade” means a rating of BBB- or better by Fitch (or its equivalent under any successor rating categories of Fitch) and Baa3 or better by Moody’s (or its equivalent under any successor rating categories of Moody’s) (or, in each case, if such Rating Agency ceases to rate the Notes for reasons outside of our control, the equivalent investment grade credit rating from any Rating Agency selected by us as a replacement Rating Agency).

“Moody’s” means Moody’s Investors Service or any successor thereto.

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“Permitted Holders” means (i) us, (ii) one or more of our Controlled Subsidiaries and (iii) the Adviser, any affiliate of the Adviser or any entity that is managed by the Adviser that is organized under the laws of a jurisdiction located in the United States of America and in the business of managing or advising clients.

“Rating Agency” means:

“Voting Stock” as applied to stock of any person, means shares, interests, participations or other equivalents in the equity interest (however designated) in such person having ordinary voting power for the election of a majority of the directors (or the equivalent) of such person, other than shares, interests, participations or other equivalents having such power only by reason of the occurrence of a contingency.

Covenants

In addition to the covenants described in the base indenture, the following covenants shall apply to the Notes. To the extent of any conflict or inconsistency between the base indenture and the following covenants, the following covenants shall govern:

Merger, Consolidation or Sale of Assets

The indenture will provide that we will not merge or consolidate with or into any other person (other than a merger of a wholly owned subsidiary into us), or sell, transfer, lease, convey or otherwise dispose of all or substantially all our property (provided that, for the avoidance of doubt, a pledge of assets pursuant to any secured debt instrument of FS KKR Capital Corp. or its Controlled Subsidiaries shall not be deemed to be any such sale, transfer, lease, conveyance or disposition) in any one transaction or series of related transactions unless:

For the purposes of this covenant, the sale, transfer, lease, conveyance or other disposition of all the property of one or more of our subsidiaries, which property, if held by us instead of such subsidiaries, would constitute all or substantially all of our property on a consolidated basis, shall be deemed to be the transfer of all or substantially all of our property.

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Although there is a limited body of case law interpreting the phrase “substantially all,” there is no precise established definition of the phrase under applicable law. Accordingly, in certain circumstances there may be a degree of uncertainty as to whether a particular transaction would involve “all or substantially all” of the properties or assets of a person. As a result, it may be unclear as to whether the merger, consolidation or sale of assets covenant would apply to a particular transaction as described above absent a decision by a court of competent jurisdiction. Although these types of transactions may be permitted under the indenture, certain of the foregoing transactions could constitute a Change of Control that results in a Change of Control Repurchase Event permitting each holder to require us to repurchase the Notes of such holder as described above.

An assumption by any person of obligations under the Notes and the indenture might be deemed for U.S. federal income tax purposes to be an exchange of the Notes for new Notes by the holders thereof, resulting in recognition of gain or loss for such purposes and possibly other adverse tax consequences to the holders. Holders should consult their own tax advisors regarding the tax consequences of such an assumption.

Other Covenants

Events of Default

Each of the following will be an event of default:

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If an event of default occurs and is continuing, then and in every such case (other than an event of default specified in item (6) above) the trustee or the holders of at least 25% in principal amount of the outstanding Notes may declare the entire principal amount of Notes to be due and immediately payable, by a notice in writing to us (and to the trustee if given by the holders), and upon any such declaration such principal or specified portion thereof shall become immediately due and payable. Notwithstanding the foregoing, in the case of the events of bankruptcy, insolvency or reorganization described in item (6) above, 100% of the principal of and accrued and unpaid interest on the Notes will automatically become due and payable.

At any time after a declaration of acceleration with respect to the Notes has been made and before a judgment or decree for payment of the money due has been obtained by the trustee, the holders of a majority in principal amount of the outstanding Notes, by written notice to us and the trustee, may rescind and annul such declaration and its consequences if (i) we have paid or deposited with the trustee a sum sufficient to pay all overdue installments of interest, if any, on all outstanding Notes, the principal of (and premium, if any, on) all outstanding Notes that have become due otherwise than by such declaration of acceleration and interest thereon at the rate or rates borne by or provided for in such Notes, to the extent that payment of such interest is lawful interest upon overdue installments of interest at the rate or rates borne by or provided for in such Notes, and all sums paid or advanced by the trustee and the reasonable compensation, expenses, disbursements and advances of the trustee, its agents and counsel, and (ii) all events of default with respect to the Notes, other than the nonpayment of the principal of (or premium, if any, on) or interest on such Notes that have become due solely by such declaration of acceleration, have been cured or waived. No such rescission will affect any subsequent default or impair any right consequent thereon.

No holder of Notes will have any right to institute any proceeding, judicial or otherwise, with respect to the indenture, or for the appointment of a receiver or trustee, or for any other remedy under the indenture, unless:

Notwithstanding any other provision in the indenture, the holder of any Note shall have the right, which is absolute and unconditional, to receive payment of the principal of (and premium, if any, on) and interest, if any,

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on such Note on the stated maturity or maturity expressed in such Note (or, in the case of redemption, on the redemption date or, in the case of repayment at the option of the holders, on the repayment date) and to institute suit for the enforcement of any such payment, and such rights shall not be impaired without the consent of such holder.

The trustee shall be under no obligation to exercise any of the rights or powers vested in it by the indenture at the request or direction of any of the holders of the Notes unless such holders shall have offered to the trustee security or indemnity satisfactory to the trustee against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction. Subject to the foregoing, the holders of a majority in principal amount of the outstanding Notes shall have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferred on the trustee with respect to the Notes, provided that (i) such direction shall not be in conflict with any rule of law or with the indenture, (ii) the trustee may take any other action deemed proper by the trustee that is not inconsistent with such direction and (iii) the trustee need not take any action that it determines in good faith may involve it in personal liability or be unjustly prejudicial to the holders of Notes not consenting.

The holders of not less than a majority in principal amount of the outstanding Notes may on behalf of the holders of all of the Notes waive any past default under the indenture with respect to the Notes and its consequences, except a default (i) in the payment of (or premium, if any, on) or interest, if any, on any Note, or (ii) in respect of a covenant or provision of the indenture which cannot be modified or amended without the consent of the holder of each outstanding Note affected. Upon any such waiver, such default shall cease to exist, and any event of default arising therefrom shall be deemed to have been cured, for every purpose, but no such waiver shall extend to any subsequent or other default or event of default or impair any right consequent thereto.

We are required to deliver to the trustee, within 120 days after the end of each fiscal year, an officers’ certificate stating that to the knowledge of the signers whether we are in default in the performance of any of the terms, provisions or conditions of the indenture.

Within 90 days after the occurrence of any default under the indenture with respect to the Notes, the trustee shall transmit notice of such default known to the trustee, unless such default shall have been cured or waived; provided, however, that, except in the case of a default in the payment of the principal of (or premium, if any, on) or interest, if any, on any Note, the trustee shall be protected in withholding such notice if and so long as the board of directors, the executive committee or a trust committee of directors of the trustee in good faith determines that withholding of such notice is in the interest of the holders of the Notes.

Satisfaction and Discharge; Defeasance

We may satisfy and discharge our obligations under the indenture by delivering to the security registrar for cancellation all outstanding Notes or by depositing with the trustee or delivering to the holders, as applicable, after the Notes have become due and payable, or otherwise, moneys sufficient to pay all of the outstanding Notes and paying all other sums payable under the indenture by us. Such discharge is subject to terms contained in the indenture.

In addition, the Notes are subject to defeasance and covenant defeasance, in each case, in accordance with the terms of the indenture.

Trustee

U.S. Bank Trust Company, National Association (as successor-in-interest to U.S. Bank National Association) is the trustee, security registrar and paying agent. U.S. Bank Trust Company, National Association, in each of its capacities, including without limitation as trustee, security registrar and paying agent, assumes no responsibility for the accuracy or completeness of the information concerning us or our affiliates or any other

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party contained in this document or the related documents or for any failure by us or any other party to disclose events that may have occurred and may affect the significance or accuracy of such information, or for any information provided to it by us, including but not limited to settlement amounts and any other information.

We may maintain banking relationships in the ordinary course of business with the trustee and its affiliates.

Governing Law

The indenture provides that it and the Notes shall be governed by and construed in accordance with the laws of the State of New York, without regard to principles of conflicts of laws that would cause the application of laws of another jurisdiction.

Book-Entry, Settlement and Clearance

Global Notes

The Notes will be initially issued in the form of one or more registered Notes in global form, without interest coupons, or the Global Notes. Upon issuance, each of the Global Notes will be deposited with the trustee as custodian for DTC and registered in the name of Cede & Co., as nominee of DTC.

Ownership of beneficial interests in a Global Note will be limited to persons who have accounts with DTC, or the DTC participants, or persons who hold interests through DTC participants. We expect that under procedures established by DTC:

Beneficial interests in Global Notes may not be exchanged for Notes in physical, certificated form except in the limited circumstances described below.

Book-Entry Procedures for Global Notes

All interests in the Global Notes will be subject to the operations and procedures of DTC. We provide the following summary of those operations and procedures solely for the convenience of investors. The operations and procedures of DTC are controlled by that settlement system and may be changed at any time. Neither we nor the underwriters are responsible for those operations or procedures.

DTC has advised us that it is:

DTC was created to hold securities for its participants and to facilitate the clearance and settlement of securities transactions between its participants through electronic book-entry changes to the accounts of its

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participants. DTC’s participants include securities brokers and dealers, including the underwriters; banks and trust companies; clearing corporations and other organizations. Indirect access to DTC’s system is also available to others such as banks, brokers, dealers and trust companies; these indirect participants clear through or maintain a custodial relationship with a DTC participant, either directly or indirectly. Investors who are not DTC participants may beneficially own securities held by or on behalf of DTC only through DTC participants or indirect participants in DTC.

So long as DTC’s nominee is the registered owner of a Global Note, that nominee will be considered the sole owner or holder of the Notes represented by that Global Note for all purposes under the indenture. Except as provided below, owners of beneficial interests in a Global Note:

As a result, each investor who owns a beneficial interest in a Global Note must rely on the procedures of DTC to exercise any rights of a holder of Notes under the indenture (and, if the investor is not a participant or an indirect participant in DTC, on the procedures of the DTC participant through which the investor owns its interest).

Payments of principal and interest with respect to the Notes represented by a Global Note will be made by the trustee to DTC’s nominee as the registered holder of the Global Note. Neither we nor the trustee will have any responsibility or liability for the payment of amounts to owners of beneficial interests in a Global Note, for any aspect of the records relating to or payments made on account of those interests by DTC, or for maintaining, supervising or reviewing any records of DTC relating to those interests.

Payments by participants and indirect participants in DTC to the owners of beneficial interests in a Global Note will be governed by standing instructions and customary industry practice and will be the responsibility of those participants or indirect participants and DTC.

Transfers between participants in DTC will be effected under DTC’s procedures and will be settled in same-day funds.

Cross-market transfers of beneficial interests in Global Notes between DTC participants, on the one hand, and Euroclear or Clearstream participants, on the other hand, will be effected within DTC through the DTC participants that are acting as depositaries for Euroclear and Clearstream. To deliver or receive an interest in a Global Note held in a Euroclear or Clearstream account, an investor must send transfer instructions to Euroclear or Clearstream, as the case may be, under the rules and procedures of that system and within the established deadlines of that system. If the transaction meets its settlement requirements, Euroclear or Clearstream, as the case may be, will send instructions to its DTC depositary to take action to effect final settlement by delivering or receiving interests in the relevant Global Notes in DTC, and making or receiving payment under normal procedures for same-day funds settlement applicable to DTC. Euroclear and Clearstream participants may not deliver instructions directly to the DTC depositaries that are acting for Euroclear or Clearstream.

Because the settlement of cross-market transfers takes place during New York business hours, DTC participants may employ their usual procedures for sending securities to the applicable DTC participants acting as depositaries for Euroclear and Clearstream. The sale proceeds will be available to the DTC participant seller on the settlement date. Thus, to a DTC participant, a cross-market transaction will settle no differently from a trade between two DTC participants. Because of time zone differences, the securities account of a Euroclear or

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Clearstream participant that purchases an interest in a Global Note from a DTC participant will be credited on the business day for Euroclear or Clearstream immediately following the DTC settlement date. Cash received in Euroclear or Clearstream from the sale of an interest in a Global Note to a DTC participant will be reflected in the account of the Euroclear of Clearstream participant the following business day, and receipt of the cash proceeds in the Euroclear or Clearstream participant’s account will be back-valued to the date on which settlement occurs in New York. DTC, Euroclear and Clearstream have agreed to the above procedures to facilitate transfers of interests in the Global Notes among participants in those settlement systems. However, the settlement systems are not obligated to perform these procedures and may discontinue or change these procedures at any time. Neither we nor the trustee will have any responsibility or liability for the performance by DTC, Euroclear or Clearstream or their participants or indirect participants of their obligations under the rules and procedures governing their operations, including maintaining, supervising or reviewing the records relating to, or payments made on account of, beneficial ownership interests in Global Notes.

Certificated Notes

Notes in physical, certificated form will be issued and delivered to each person that DTC identifies as a beneficial owner of the related Notes only if:

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MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES

The following discussion is a general summary of the material U.S. federal income tax considerations (and, in the case of a non-U.S. holder (as defined below), the material U.S. federal estate tax considerations) applicable to purchasing, owning, and disposing of the Notes. This summary addresses only those holders who purchase Notes in this offering at the public offering price. Moreover, this summary does not purport to be a complete description of the income tax considerations applicable to such an investment and does not address any state, local or non-U.S. income or other tax considerations. The discussion is based upon the Code, the regulations promulgated thereunder by the U.S. Department of the Treasury, or the Treasury Regulations, and administrative and judicial interpretations, each as of the date of this prospectus supplement and all of which are subject to change, potentially with retroactive effect. Investors should consult their own tax advisors with respect to tax considerations that pertain to their investment in the Notes.

This discussion deals only with Notes held as capital assets within the meaning of Section 1221 of the Code and does not cover possible income tax considerations to beneficial owners (referred to in this discussion as “holders”) with special circumstances, including the U.S. federal income tax consequences applicable to holders such as financial institutions, insurance companies, controlled foreign corporations, passive foreign investment companies and regulated investment companies (and stockholders of such corporations), dealers in securities or currencies, traders in securities, former citizens of the United States, persons holding the Notes as a hedge against currency risks or as a position in a “straddle,” “hedge,” “constructive sale transaction” or “conversion transaction” (as those terms are defined under the Code), entities that are tax-exempt for U.S. federal income tax purposes, retirement plans, individual retirement accounts, tax-deferred accounts, persons subject to the alternative minimum tax, pass-through entities (including partnerships and other entities and arrangements classified as partnerships for U.S. federal income tax purposes) and beneficial owners of such pass-through entities, or persons whose functional currency (as defined in Section 985 of the Code) is not the U.S. dollar. This discussion also does not deal with holders of the Notes other than original purchasers of the Notes who acquire the Notes in this offering for a price equal to their original issue price (i.e., the first price at which a substantial amount of the Notes is sold other than to bond houses, brokers, or similar persons or organizations acting in the capacity of underwriters, placement agents or wholesalers). Investors considering purchasing the Notes should consult their own tax advisors concerning the application of the U.S. federal, state and local tax laws to their individual circumstances, as well as any consequences to such investors relating to purchasing, owning and disposing of the Notes under the laws of any non-U.S. taxing jurisdiction.

For purposes of this discussion, the term “U.S. holder” means a holder of a Note that is, for U.S. federal income tax purposes, (i) an individual citizen or resident of the United States, (ii) a corporation or other entity treated as a corporation for U.S. federal income tax purposes, created or organized in or under the laws of the United States or of any political subdivision thereof, (iii) a trust (a) subject to the control of one or more United States persons (as defined under the Code) and the primary supervision of a court in the United States, or (b) that has in force a valid election (under applicable Treasury Regulations) to be treated as a United States person, or (iv) an estate the income of which is subject to U.S. federal income taxation regardless of its source. The term “non-U.S. holder” means a holder of a Note that is neither a U.S. holder nor a partnership (including an entity or arrangement treated as a partnership for U.S. federal income tax purposes).

If a partnership (including an entity or arrangement treated as a partnership for U.S. federal income tax purposes) holds any Notes, the U.S. federal income tax treatment of a partner, member or owner of such entity generally will depend upon the status of such partner, member or owner, the activities of such entity and certain determinations made at the partner, member or owner level. Such entities holding Notes, and persons holding interests in such entities, should each consult their own tax advisors as to the consequences of investing in the Notes in their individual circumstances.

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Taxation of U.S. Holders

Payments or accruals of interest on a Note generally will be taxable to a U.S. holder as ordinary interest income at the time they are received (actually or constructively) or accrued, in accordance with the U.S. holder’s regular method of tax accounting.

If the issue price of a Note is less than its stated principal amount by more than, or an amount equal to, a specified de minimis amount, the Note will be considered as having been issued for U.S. federal income tax purposes with original issue discount (“OID”) in an amount equal to such excess. If the Note is issued with OID, a U.S. holder generally will be required to include the OID in gross income as ordinary interest income as the OID accrues, in advance of the receipt of cash attributable to that income and regardless of such holder’s regular method of tax accounting. Such OID will be included in gross income for each day during each taxable year in which a Note is held by a U.S. holder using a constant yield to maturity method that reflects the compounding of interest. This means that a U.S. holder will be required to include increasingly greater amounts of OID over time.

If a U.S. holder purchases a Note in this offering at a price that exceeds the stated principal amount of the Note, such holder will be considered to have purchased the Note with amortizable bond premium equal to the amount of that excess. A U.S. holder generally may elect to amortize the premium using a constant yield method over the remaining term of the Note as an offset to interest when included in income in accordance with such holder’s regular method of tax accounting. This election to amortize premium on a constant yield method will apply to all debt obligations (other than debt obligations the interest on which is excludable from gross income) held by such holder as of the beginning of, or acquired during or after, the first taxable year for which the election applies and may not be revoked without the consent of the Internal Revenue Service, or the IRS. If a U.S. holder makes the election to amortize bond premium with respect to a Note, such holder will be required to reduce its adjusted tax basis in such Note by the amount of the premium amortized. If a U.S. holder does not elect to amortize bond premium, that premium will decrease the gain or increase the loss such holder would otherwise recognize on the sale, exchange, redemption, retirement or other taxable disposition of the Note. Prospective investors should consult their own tax advisors regarding this election.

Upon the sale, exchange, redemption, retirement or other taxable disposition of a Note, a U.S. holder generally will recognize capital gain or loss equal to the difference between the amount realized on the sale, exchange, redemption, retirement or other taxable disposition (excluding amounts representing accrued and unpaid interest, which are treated as ordinary income) and the U.S. holder’s adjusted tax basis in the Note. A U.S. holder’s adjusted tax basis in a Note generally will equal the U.S. holder’s initial investment in the Note, increased by OID previously included in income with respect to the Note and reduced by the amount of any bond premium previously amortized by the U.S. holder with respect to the Note as well as any cash payments on the Note other than qualified stated interest. Capital gain or loss generally will be long- term capital gain or loss if the U.S. holder’s holding period in the Note was more than one year. Long-term capital gains generally are taxed at reduced rates for individuals and certain other non-corporate U.S. holders, and the deductibility of capital losses is subject to limitations.

Taxation of Non-U.S. Holders

A non-U.S. holder generally will not be subject to U.S. federal income or withholding taxes on payments of principal or interest on a Note, provided that (i) income on the Note is not effectively connected with the conduct by the non-U.S. holder of a trade or business within the United States, (ii) in the case of interest income, the non-U.S. holder is not a bank receiving interest described in Section 881(c)(3)(A) of the Code, does not own (actually or constructively) 10 percent or more of the total combined voting power of all classes of our stock and is not a controlled foreign corporation for U.S. federal income tax purposes that is related, directly or indirectly, to us through sufficient stock ownership and (iii) the non-U.S. holder provides a statement on an IRS Form W-8BEN or IRS Form W-8BEN-E (or other applicable form) signed under penalties of perjury that includes the non-U.S. holder’s name and address and certifies that it is not a United States person in compliance with applicable

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requirements, or satisfies documentary evidence requirements for establishing that it is a non-U.S. holder. The amount of interest paid to a non-U.S. holder on the Notes will be reported to the non-U.S. holder and the IRS annually on IRS Form 1042-S even if the non-U.S. holder is exempt from the U.S. federal income or withholding taxes described above. Copies of the information returns reporting those payments and the amounts withheld also may be made available to the tax authorities in the country where the non-U.S. holder is resident under the provisions of an applicable income tax treaty or agreement.

A non-U.S. holder that is not exempt from tax under these rules generally will be subject to U.S. federal income tax withholding on payments of interest on the Notes at a rate of 30 percent unless (i) the income is effectively connected with the conduct of a U.S. trade or business, in which case the interest will be subject to U.S. federal income tax on a net income basis generally in the same manner as U.S. holders, or (ii) an applicable income tax treaty provides for a lower rate of, or exemption from, such withholding tax. To claim the benefit of an applicable income tax treaty, the non-U.S. holder must timely provide a properly executed IRS Form W-8BEN or IRS Form W-BEN-E (or other applicable form) and, to claim exemption from withholding tax because the interest income is effectively connected with a U.S. trade or business, the non-U.S. holder must timely provide a properly executed IRS Form W-8ECI (or other applicable form).

In the case of a non-U.S. holder that is a corporation and receives income that is effectively connected with the conduct of a U.S. trade or business, such income may also be subject to a branch profits tax (which is generally imposed on a non-U.S. corporation on the actual or deemed repatriation from the United States of earnings and profits attributable to a U.S. trade or business) at a 30 percent rate. The branch profits tax may not apply (or may apply at a reduced rate) if the non-U.S. holder is eligible for benefits under an applicable income tax treaty.

Generally, a non-U.S. holder will not be subject to U.S. federal income or withholding taxes on any amount that constitutes capital gain upon the sale, exchange, redemption, retirement or other taxable disposition of a Note, unless the gain is effectively connected with the conduct of a trade or business in the United States by the non-U.S. holder (and, if an income tax treaty applies, is attributable to a United States “permanent establishment” maintained by the non-U.S. holder). However, if an individual non-U.S. holder is present in the United States for 183 or more days during the taxable year in which the sale, exchange, redemption, retirement or other taxable disposition of a Note occurs, and certain other conditions exist, such U.S. holder will be subject to a flat 30 percent U.S. federal income tax on any resulting gain (except to the extent otherwise provided by an applicable income tax treaty), which may be offset by certain U.S. losses. Non-U.S. holders should consult their own tax advisors with regard to whether taxes will be imposed on capital gain in their individual circumstances.

A Note that is held by an individual who, at the time of such individual’s death, is not a citizen or resident of the United States, for U.S. federal estate tax purposes, generally will not be subject to the U.S. federal estate tax, unless, at the time of death, (i) such individual owns (actually or constructively) 10 percent or more of the total combined voting power of all classes of our stock or (ii) such individual’s interest in the Notes is effectively connected with the individual’s conduct of a U.S. trade or business.

Information Reporting and Backup Withholding

A U.S. holder (other than an “exempt recipient,” including a corporation and certain other persons who, when required, are able to demonstrate their exempt status) may be subject to backup withholding on, and information reporting requirements with respect to, payments of principal or interest on, and proceeds from the sale, exchange, redemption, retirement or other taxable disposition of, the Notes. In general, if a non-corporate U.S. holder subject to information reporting fails to furnish a correct taxpayer identification number or otherwise fails to comply with applicable backup withholding requirements, backup withholding at the applicable statutory rate may apply. Non-U.S. holders generally are exempt from information reporting and backup withholding, provided, if necessary, that they demonstrate their qualification for exemption. Backup withholding is not an

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additional tax. Any amounts withheld under the backup withholding rules from a payment to a holder generally would be allowed as a refund or a credit against such holder’s U.S. federal income tax provided the required information is timely furnished to the IRS.

Tax Shelter Reporting Regulations

Under applicable U.S. Treasury Regulations, if a U.S. holder recognizes a loss with respect to the Notes of $2 million or more for a non-corporate U.S. holder or $10 million or more for a corporate U.S. holder in any single taxable year (or a greater loss over a combination of taxable years), the U.S. holder may be required to file with the IRS a disclosure statement on IRS Form 8886. Direct U.S. holders of portfolio securities are in many cases excepted from this reporting requirement, but, under current guidance, U.S. holders of securities issued by a RIC are not exempt from such reporting. Future guidance may extend the current exception from this reporting requirement to U.S. holders of securities issued by most or all RICs. The fact that a loss is reportable under these U.S. Treasury Regulations does not affect the legal determination of whether a taxpayer’s treatment of the loss is proper. Significant monetary penalties apply to a failure to comply with this reporting requirement. States may also have a similar reporting requirement. U.S. holders of the Notes should consult their own tax advisors to determine the applicability of these U.S. Treasury Regulations in light of their individual circumstances.

Medicare Tax on Net Investment Income

A 3.8 percent tax is imposed under Section 1411 of the Code on the “net investment income” of certain U.S. citizens and residents and on the undistributed net investment income of certain estates and trusts. Among other items, net investment income generally includes payments of interest on, and net gains recognized from the sale, exchange, redemption, retirement or other taxable disposition of, the Notes, less certain deductions. Prospective investors in the Notes should consult their own tax advisors regarding the effect, if any, of this tax on their ownership and disposition of the Notes.

Foreign Account Tax Compliance Act

The Foreign Account Tax Compliance Act provisions of the Code, or FATCA, the related Treasury Regulations and other IRS administrative guidance promulgated thereunder, when applicable, generally impose a U.S. federal withholding tax of 30 percent on interest on a debt obligation that produces U.S. source interest paid to certain non-U.S. entities (including, in some circumstances, where such an entity is acting as an intermediary) that fail to comply with certain certification and information reporting requirements. Prospective investors in the Notes should consult their own tax advisors regarding the effect, if any, of the FATCA rules to them based on their particular circumstances.

THE PRECEDING DISCUSSION IS NOT INTENDED TO BE A COMPLETE DISCUSSION OF ALL THE APPLICABLE TAX CONSEQUENCES TO A HOLDER OF PURCHASING, OWNING OR DISPOSING OF THE NOTES, NOR IS IT INTENDED TO CONSTITUTE TAX ADVICE. PROSPECTIVE INVESTORS SHOULD CONSULT THEIR OWN TAX ADVISORS WITH RESPECT TO THE PARTICULAR TAX CONSEQUENCES OF AN INVESTMENT IN THE NOTES IN THEIR INDIVIDUAL CIRCUMSTANCES.

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UNDERWRITING

BofA Securities, Inc., BMO Capital Markets Corp., J.P. Morgan Securities LLC, KKR Capital Markets LLC, SMBC Nikko Securities America, Inc. and Truist Securities, Inc. are acting as representatives of each of the underwriters named below. Subject to the terms and conditions set forth in an underwriting agreement between us and the representatives, we have agreed to sell to the underwriters, and each of the underwriters has agreed, severally and not jointly, to purchase from us, the aggregate principal amount of Notes set forth opposite its name below.

Subject to the terms and conditions set forth in the underwriting agreement, the underwriters have agreed, severally and not jointly, to purchase all of the Notes sold under the underwriting agreement if any of these Notes are purchased. If an underwriter defaults, the underwriting agreement provides that the purchase commitments of the nondefaulting underwriters may be increased or the underwriting agreement may be terminated.

We have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended, or the Securities Act, or to contribute to payments the underwriters may be required to make in respect of those liabilities.

The underwriters are offering the Notes, subject to prior sale, when, as and if issued to and accepted by them, subject to approval of legal matters by their counsel, including the validity of the Notes, and other conditions contained in the underwriting agreement, such as the receipt by the underwriters of officer’s certificates and legal opinions. The underwriters reserve the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

Commissions and Discounts

The following table shows the total underwriting discounts that we are to pay to the underwriters in connection with this offering.

The underwriters propose to offer some of the Notes to the public at the public offering price set forth on the cover page of this prospectus supplement and may offer the Notes to certain other Financial Industry Regulatory Authority (FINRA) members at the public offering price less a concession not in excess of   % of the aggregate principal amount of the Notes. The underwriters may allow, and the dealers may reallow, a discount not in excess of   % of the aggregate principal amount of the Notes. After the initial offering of the Notes to the public, the public offering price and such concessions may be changed. No such change shall change the amount of proceeds to be received by us as set forth on the cover page of this prospectus supplement.

The expenses of the offering, not including the underwriting discount, are estimated at $   and are payable by us.

An entity wholly-owned and controlled by an affiliate of the Adviser may purchase a significant amount of Notes in this offering through the underwriters at the offering price.

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No Sales of Similar Securities

Subject to certain exceptions, we have agreed not to sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly, any debt securities issued or guaranteed by us or any securities convertible into or exercisable or exchangeable for debt securities issued or guaranteed by us or file or cause to be declared effective a registration statement under the Securities Act with respect to any of the foregoing, without the consent of the representatives, until the settlement date of this offering. This consent may be given at any time without public notice.

Listing

The Notes are a new issue of securities with no established trading market. The Notes will not be listed on any securities exchange or quoted on any automated dealer quotation system. We have been advised by certain of the underwriters that certain of the underwriters presently intend to make a market in the Notes after completion of this offering as permitted by applicable laws and regulations. Such underwriters are not obligated, however, to make a market in the Notes and any such market-making may be discontinued at any time in the sole discretion of such underwriters without any notice. Accordingly, no assurance can be given that an active and liquid public trading market for the Notes will develop or be maintained, and no assurance can be given that an active and liquid public trading market for the Notes will be maintained. If an active public trading market for the Notes does not develop, the market price and liquidity of the Notes may be adversely affected.

Price Stabilization, Short Positions

In connection with the offering, the underwriters may purchase and sell Notes in the open market. These transactions may include short sales and purchases on the open market to cover positions created by short sales. Short sales involve the sale by the underwriters of a greater principal amount of Notes than they are required to purchase in the offering. The underwriters must close out any short position by purchasing Notes in the open market. A short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the Notes in the open market after pricing that could adversely affect investors who purchase in the offering.

Similar to other purchase transactions, the underwriters’ purchases to cover the syndicate short sales may have the effect of raising or maintaining the market price of the Notes or preventing or retarding a decline in the market price of the Notes. As a result, the price of the Notes may be higher than the price that might otherwise exist in the open market.

Any of these activities may cause the price of the Notes to be higher than the price that otherwise would exist in the open market in the absence of such transactions. These transactions may be affected in the over-the-counter market or otherwise and, if commenced, may be discontinued at any time without any notice relating thereto.

Neither we nor any of the underwriters make any representation or prediction as to the direction or magnitude of any effect that the transactions described above may have on the price of the Notes. In addition, neither we nor any of the underwriters make any representation that the representatives will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.

Alternative Settlement Cycle

We expect that delivery of the Notes offered hereby will be made against payment therefor on or about   , 2024 which will be the     business day following the date of the pricing of the Notes offered hereby (such settlement being herein referred to as “T+ ”). Under Rule 15c6-1 promulgated under the Exchange Act, trades in the secondary market generally are required to settle in one business day, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes offered hereby prior

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to the date of delivery hereunder will be required, by virtue of the fact that the Notes offered hereby initially will settle in T+  business days, to specify an alternate settlement arrangement at the time of any such trade to prevent a failed settlement.

Electronic Offer, Sale and Distribution of Notes

The underwriters may make prospectuses available in electronic (PDF) format. A prospectus in electronic (PDF) format may be made available on a web site maintained by the underwriters, and the underwriters may distribute such prospectuses electronically.

Other Relationships

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include sales and trading, commercial and investment banking, advisory, investment management, investment research, principal investment, hedging, market making, brokerage and other financial and non-financial activities and services. The underwriters and their respective affiliates have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for us and our affiliates, for which they received or will receive customary fees and expenses, including acting as underwriter for our and our affiliates’ securities offerings.

In the ordinary course of their various business activities, the underwriters and their respective affiliates, officers, directors and employees may purchase, sell or hold a broad array of investments and actively trade securities, derivatives, loans, commodities, currencies, credit default swaps and other financial instruments for their own account and for the accounts of their customers, and such investment and trading activities may involve or relate to assets, securities and/or instruments of ours and our affiliates (directly, as collateral securing other obligations or otherwise) and/or persons and entities with relationships with us and our affiliates. If the underwriters or their respective affiliates have a lending relationship with us, the underwriters or their respective affiliates routinely hedge, or may hedge, its credit exposure to us consistent with their customary risk management policies. Typically, such underwriters and their affiliates would hedge such exposure by entering into transactions which consist of either the purchase of credit default swaps or the creation of short positions in our securities, including potentially the Notes offered hereby. Any such credit default swaps or short positions could adversely affect future trading prices of the Notes offered hereby. The underwriters and their respective affiliates may also communicate independent investment recommendations, market color or trading ideas and/or publish or express independent research views in respect of such assets, securities or instruments and may at any time hold, or recommend to clients that they should acquire, long and/or short positions in such assets, securities and instruments.

KKR Capital Markets LLC, or KCM, an affiliate of the Company, in its capacity as a Joint Book-Running Manager, is expected to participate in the offering of the Notes described herein. KCM’s participation in the offering of the Notes could be considered an agency cross transaction for purposes of Section 206(3) of the Advisers Act. The Adviser, KCM, their affiliates and their agents and advisors face a potentially conflicting division of loyalties and responsibilities regarding any such transaction. Under Section 206(3) of the Advisers Act, agency cross transactions, if any, require client consent. For the avoidance of doubt, unless the fee has otherwise been disclosed and consented to by an Affiliated Buyer, no fee is being paid to KCM with respect to any participation by an investment fund, vehicle or account that is discretionarily managed in a fiduciary capacity by an affiliate of KCM for the benefit of one or more third party investors (an “Affiliated Buyer”). Each purchaser of Notes or of any beneficial interest therein, and each subsequent transferee thereof, will be deemed by its acquisition of such Notes (or beneficial interest therein) to have provided its consent to the transactions and procedures described above.

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Certain of the net proceeds from the sale of the Notes, not including underwriting compensation, may be paid to affiliates of certain of the underwriters as lenders under certain of our financing arrangements. For example, an affiliate of J.P. Morgan Securities LLC is the administrative agent and a lender under the Company’s senior secured revolving credit facility. In addition, an affiliate of SMBC Nikko Securities America, Inc. is the administrative agent, collateral agent and a lender under the credit facility of CCT Tokyo Funding LLC, a wholly-owned special purpose financing subsidiary of the Company, and certain of the underwriters and their affiliates are lenders under the Company’s senior secured revolving credit facility. Further, J.P. Morgan Securities LLC acted as an advisor with respect to the listing of our shares of common stock on the NYSE and it, as well as certain of the underwriters herein, or their respective affiliates, were underwriters or purchasers with respect to the issuance of certain of the Company’s outstanding series of notes. U.S. Bancorp Investments, Inc., one of the underwriters, is an affiliate of the trustee. In addition, a portion of the net proceeds from the sale of the Notes may be used to repay outstanding indebtedness under our credit facilities and certain notes. To the extent any of the underwriters or their affiliates hold some of such outstanding indebtedness, such party would receive a portion of the net proceeds from the sale of the Notes. Accordingly, any such underwriter may have a conflict of interest, in that it has an interest in the offerings beyond the respective underwriting discounts it receives in connection with the offering.

The principal business address of BofA Securities, Inc. is One Bryant Park, New York, New York 10036. The principal business address of BMO Capital Markets Corp. is 151 West 42nd Street, New York, New York 10036. The principal business address of J.P. Morgan Securities LLC is 383 Madison Avenue, New York, New York 10179. The principal business address of KKR Capital Markets LLC is 30 Hudson Yards, New York, New York 10001. The principal business address of SMBC Nikko Securities America, Inc. is 277 Park Avenue, New York, New York 10172. The principal business address of Truist Securities is 3333 Peachtree Road NE, 11th Floor, Atlanta, Georgia 30326.

Notice to the Prospective Investors in the European Economic Area

In relation to each European Economic Area Member State (each a “Relevant Member State”), no notes have been offered or will be offered pursuant to this offering to the public in that Relevant Member State prior to the publication of a prospectus in relation to the Notes which has been approved by the competent authority in that Relevant Member State or, where appropriate, approved in another Relevant Member State and notified to the competent authority in that Relevant Member State, all in accordance with the Prospectus Regulation (as defined below), except that the Notes may be offered to the public in that Relevant Member State at any time:

(iii) in any other circumstances falling within Article 1(4) of the Prospectus Regulation,

provided that no such offer of the Notes shall require the Company or any bank to publish a prospectus pursuant to Article 3 of the Prospectus Regulation or supplement a prospectus pursuant to Article 23 of the Prospectus Regulation.

For the purposes of this provision, the expression an ‘offer to the public in relation to the Notes in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and any notes to be offered so as to enable an investor to decide to purchase any notes, and the expression “Prospectus Regulation” means Regulation (EU) 20 I 7/1129.

Each person in a Relevant Member State who receives any communication in respect of, or who acquires any notes under, this offering contemplated hereby will be deemed to have represented, warranted and agreed to and with each of the underwriters and their affiliates and the Company that:

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No key information document required by Regulation (EU) No 1286 /2014 (as amended, the “PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail investors in a Relevant Member State has been prepared and therefore offering or selling the Notes or otherwise making them available to any retail investor in a Relevant Member State may be unlawful under the PRIIPs Regulation.

The Company, the underwriters and their affiliates, and others will rely upon the truth and accuracy of the foregoing representation, acknowledgement and agreement. Notwithstanding the above, a person who is not a qualified investor and who has notified the underwriters of such fact in writing may, with the prior consent of the underwriters, be permitted to acquire notes in this offering.

Notice to Prospective Investors in the United Kingdom

This Prospectus and any other material in relation to the notes described herein is only being distributed to, and is only directed at, and any investment or investment activity to which this Prospectus relates is available only to, and will be engaged in only with persons who are (i) persons having professional experience in matters relating to investments who fall within the definition of investment professionals in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (as amended, the “FPO”); or (iii) high net worth entities falling within Article 49(2)(a) to (d) of the FPO; (iii) outside the UK; or (iv) persons to whom an invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) in connection with the issue or sale of any notes may otherwise lawfully be communicated or caused to be communicated, (all such persons together being referred to as “Relevant Persons”). The Notes are only available in the UK to, and any invitation, offer or agreement to purchase or otherwise acquire the Notes will be engaged in only with, the Relevant Persons. This Prospectus and its contents are confidential and should not be distributed, published or reproduced (in whole or in part) or disclosed by recipients to any other person in the UK. Any person in the UK that is not a Relevant Person should not act or rely on this Prospectus or any of its contents.

No notes have been offered or will be offered pursuant to this offering to the public in the United Kingdom prior to the publication of a prospectus in relation to the Notes which has been approved by the Financial Conduct Authority, except that the Notes may be offered to the public in the United Kingdom at any time:

provided that no such offer of the Notes shall require the Company and/or any underwriters or any of their affiliates to publish a prospectus pursuant to Section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the UK Prospectus Regulation. For the purposes of this provision, the expression an “offer to the public” in relation to the Notes in the United Kingdom means the communication in any form and by any means

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of sufficient information on the terms of the offer and any notes to be offered so as to enable an investor to decide to purchase or subscribe for any notes and the expression “UK Prospectus Regulation” means Regulation (EU)2017/1129 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018.

No key information document required by Regulation (EU) No 1286/2014 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018 (the “UK PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail investors in the UK has been prepared and therefore offering or selling the Notes or otherwise making them available to any retail investor in the UK may be unlawful under the UK PRIIPs Regulation.

Each person in the UK who acquires any notes in the Offer or to whom any offer is made will be deemed to have represented, acknowledged and agreed to and with the Company, the underwriters and their affiliates that it meets the criteria outlined in this section.

Notice to Prospective Investors in Singapore

This prospectus has not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the Notes may not be circulated or distributed, nor may the Notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor (as defined in Section 4A of the Securities and Futures Act, Chapter 289 of Singapore (the “SFA”)) under Section 274 of the SFA, (ii) to a relevant person (as defined in Section 275(2) of the SFA) pursuant to Section 275(1) of the SFA, or any person pursuant to Section 275(1A) of the SFA, and in accordance with the conditions specified in Section 275 of the SFA or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA, in each case subject to conditions set forth in the SFA.

Where the Notes are subscribed or purchased under Section 275 of the SFA by a relevant person which is a corporation (which is not an accredited investor (as defined in Section 4A of the SFA)) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor, the securities (as defined in Section 239(1) of the SFA) of that corporation shall not be transferable for 6 months after that corporation has acquired the Notes under Section 275 of the SFA except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person (as defined in Section 275(2) of the SFA), (2) where such transfer arises from an offer in that corporation’s securities pursuant to Section 275(1A) of the SFA, (3) where no consideration is or will be given for the transfer, (4) where the transfer is by operation of law, (5) as specified in Section 276(7) of the SFA, or (6) as specified in Regulation 32 of the Securities and Futures (Offers of Investments) (Shares and Debentures) Regulations 2005 of Singapore (“Regulation 32”).

Where the Notes are subscribed or purchased under Section 275 of the SFA by a relevant person which is a trust (where the trustee is not an accredited investor (as defined in Section 4A of the SFA)) whose sole purpose is to hold investments and each beneficiary of the trust is an accredited investor, the beneficiaries’ rights and interest (howsoever described) in that trust shall not be transferable for 6 months after that trust has acquired the Notes under Section 275 of the SFA except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person (as defined in Section 275(2) of the SFA), (2) where such transfer arises from an offer that is made on terms that such rights or interest are acquired at a consideration of not less than S$200,000 (or its equivalent in a foreign currency) for each transaction (whether such amount is to be paid for in cash or by exchange of securities or other assets), (3) where no consideration is or will be given for the transfer, (4) where the transfer is by operation of law, (5) as specified in Section 276(7) of the SFA, or (6) as specified in Regulation 32.

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Singapore Securities and Futures Act Product Classification—Solely for the purposes of its obligations pursuant to sections 309B(1)(a) and 309B(1)(c) of the SFA, the Company has determined, and hereby notifies all relevant persons (as defined in Section 309A of the SFA) that the Notes are “prescribed capital markets products” (as defined in the Securities and Futures (Capital Markets Products) Regulations 2018) and Excluded Investment Products (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

Notice to Prospective Investors in Australia

No placement document, prospectus, product disclosure statement or other disclosure document has been lodged with the Australian Securities and Investments Commission, or ASIC, in relation to the offering. This prospectus supplement does not constitute a prospectus, product disclosure statement or other disclosure document under the Corporations Act 2001, or Corporations Act, and does not purport to include the information required for a prospectus, product disclosure statement or other disclosure document under the Corporations Act.

Any offer in Australia of the Notes may only be made to persons known as the Exempt Investors who are “sophisticated investors” (within the meaning of section 708(8) of the Corporations Act), “professional investors” (within the meaning of section 708(11) of the Corporations Act) or otherwise pursuant to one or more exemptions contained in section 708 of the Corporations Act so that it is lawful to offer the Notes without disclosure to investors under Chapter 6D of the Corporations Act.

The Notes applied for by Exempt Investors in Australia must not be offered for sale in Australia in the period of 12 months after the date of allotment under the offering, except in circumstances where disclosure to investors under Chapter 6D of the Corporations Act would not be required pursuant to an exemption under section 708 of the Corporations Act or otherwise or where the offer is pursuant to a disclosure document which complies with Chapter 6D of the Corporations Act. Any person acquiring the Notes must observe such Australian on-sale restrictions.

This prospectus supplement contains general information only and does not take account of the investment objectives, financial situation or particular needs of any particular person. It does not contain any securities recommendations or financial product advice. Before making an investment decision, investors need to consider whether the information in this prospectus supplement is appropriate to their needs, objectives and circumstances, and, if necessary, seek expert advice on those matters.

Notice to Prospective Investors in the Dubai International Financial Centre

This prospectus supplement relates to an Exempt Offer in accordance with the Offered Securities Rules of the Dubai Financial Services Authority, or DFSA. This prospectus supplement is intended for distribution only to persons of a type specified in the Offered Securities Rules of the DFSA. It must not be delivered to, or relied on by, any other person. The DFSA has no responsibility for reviewing or verifying any documents in connection with Exempt Offers. The DFSA has not approved this prospectus supplement or any other associated documents nor taken steps to verify the information set forth herein and has no responsibility for the prospectus supplement. The Notes to which this prospectus supplement relates may be illiquid and/or subject to restrictions on their resale. Prospective purchasers of the Notes offered should conduct their own due diligence on the Notes. If you do not understand the contents of this prospectus supplement you should consult an authorized financial advisor.

Notice to Residents of the People’s Republic of China (excluding Hong Kong, Macau and Taiwan)

This prospectus does not constitute a recommendation to acquire, an invitation to apply for or buy, or an offer to apply for or buy, a solicitation of interest in the application or purchase, of any securities, any interest in any securities investment fund or any other financial investment product, in the People’s Republic of China (for the purpose of this prospectus excluding Taiwan, Hong Kong and Macau) (“PRC”). This prospectus is solely for use by Qualified Domestic Institutional Investors and other qualified investors duly licensed in accordance with

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applicable laws of the PRC and must not be circulated or disseminated in the PRC for any other purpose. Any person or entity resident in the PRC must satisfy himself/itself that all applicable PRC laws and regulations have been complied with, and all necessary government approvals and licenses (including any investor qualification requirements) have been obtained, in connection with his/its investment outside of the PRC.

Notice to Prospective Investors in Hong Kong

Warning—The contents of this prospectus supplement have not been reviewed, approved or endorsed by any regulatory authority in Hong Kong. You are advised to exercise caution in relation to the offer. If you are in any doubt about any of the contents of this prospectus supplement, you should obtain independent professional advice.

The Notes have not been offered or sold and will not be offered or sold in Hong Kong, by means of any document, other than (a) to “professional investors” as defined in the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong) (“SFO”) and any rules made under the SFO, including the Securities and Futures (Professional Investor) Rules (Chapter 571D of the Laws of Hong Kong); or (b) in other circumstances which do not result in the document being a “prospectus” as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Chapter 32 of the Laws of Hong Kong) (“CWUMPO”) or which do not constitute an offer to the public within the meaning of the CWUMPO. No advertisement, invitation or document relating to the Notes has been or may be issued or has been or may be in the possession of any person for the purposes of issue, whether in Hong Kong or elsewhere, which is directed at, or the contents of which are likely to be accessed or read by, the public of Hong Kong (except if permitted to do so under the laws of Hong Kong) other than with respect to Notes which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the SFO and any rules made under the SFO. This prospectus supplement is intended solely for the use of the person to whom it has been delivered for the purpose of evaluating a possible investment by the recipient in the Notes described herein, and is not to be reproduced or distributed to any other persons (other than professional advisors of the prospective investor receiving this prospectus supplement).

Notice to Prospective Investors in Israel

No action has been, or will be, taken in Israel that would permit an offering of the Notes or a distribution of this prospectus supplement and the accompanying prospectus to the public in Israel. In particular, neither the prospectus supplement nor the accompanying prospectus has been reviewed or approved by the Israel Securities Authority. The Notes are being offered to a limited number of qualified investors listed on the first addendum of the Securities Law (a “Qualified Investor”), in all cases under the circumstances that will fall within the private placement exemption of the Israeli Securities Law of 1968 (“Securities Law”). This prospectus supplement and the accompanying prospectus may not be reproduced or used for any other purpose, nor be furnished to any other person other than those to whom copies have been sent. Any investor in the Notes shall be required to declare in writing prior to such purchase that it qualifies as a Qualified Investor, agrees to be deemed a Qualified Investor, and is aware of the consequences of being classified as a Qualified Investor, that it will comply with the guidelines of the Israel Securities Authority with respect to the sale or offer of securities to Qualified Investors (including those published on September 21, 2014), and that it is purchasing the Notes for its own benefit and on its own account and not with the aim or intention of distributing or offering the Notes to other parties. Nothing in this prospectus supplement or the accompanying prospectus should be considered ‘investment advice’, or ‘investment marketing’ as defined in the Regulation of Investment Advice, Investment Marketing and Portfolio Management Law of 1995. Any investor who purchases the Notes shall be required to declare in writing that it has the knowledge, expertise and experience in financial and business matters so as to be capable of evaluating the risks and merits of an investment in the Notes, without relying on any of the materials provided.

Notice to Prospective Investors in Saudi Arabia

This prospectus supplement may not be distributed in the Kingdom of Saudi Arabia except to such persons as are permitted under the Rules on the Offer of Securities and Continuing Obligations as issued by the board of

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the Saudi Arabian Capital Market Authority (“CMA”) pursuant to resolution number 3-123-2017 dated 9/4/1439H (corresponding to 27/12/2017G) as amended by resolution number 1-104-2019 dated 01/02/1441H (corresponding to 30/09/2019G), as amended. The CMA does not make any representation as to the accuracy or completeness of this prospectus supplement and expressly disclaims any liability whatsoever for any loss arising from, or incurred in reliance upon, any part of this prospectus supplement. Prospective purchasers of the Notes offered hereby should conduct their own due diligence on the accuracy of the information relating to the Notes. If you do not understand the contents of this prospectus supplement, you should consult an authorized financial advisor.

Notice to Prospective Investors in Canada

This prospectus constitutes an “exempt offering document” as defined in and for the purposes of applicable Canadian securities laws. No prospectus has been filed with any securities commission or similar regulatory authority in Canada in connection with the offer and sale of the Notes. No securities commission or similar regulatory authority in Canada has reviewed or in any way passed upon this prospectus or on the merits of the Notes and any representation to the contrary is an offence.

Canadian investors are advised that this prospectus has been prepared in reliance on section 3A.3 of National Instrument 33-105 Underwriting Conflicts (“NI 33-105”). Pursuant to section 3A.3 of NI 33-105, the Company and the underwriters in the offering are exempt from the requirement to provide Canadian investors with certain conflicts of interest disclosure pertaining to “connected issuer” and/or “related issuer” relationships as would otherwise be required pursuant to subsection 2.1(1) of NI 33-105.

Resale Restrictions

The offer and sale of the Notes in Canada is being made on a private placement basis only and is exempt from the requirement that the Company prepares and files a prospectus under applicable Canadian securities laws. Any resale of Notes by a Canadian investor in this offering must be made in accordance with applicable Canadian securities laws, which may vary depending on the relevant jurisdiction, and which may require resales to be made in accordance with Canadian prospectus requirements, a statutory exemption from the prospectus requirements, in a transaction exempt from the prospectus requirements or otherwise under a discretionary exemption from the prospectus requirements granted by the applicable local Canadian securities regulatory authority. These resale restrictions may under certain circumstances apply to resales of the Notes outside of Canada.

Representations of Purchasers

Each Canadian investor who purchases the Notes will be deemed to have represented to the Company, the underwriters and to each dealer from whom a purchase confirmation is received, as applicable, that the investor is (i) purchasing as principal, or is deemed to be purchasing as principal in accordance with applicable Canadian securities laws; (ii) an “accredited investor” as such term is defined in section 1.1 of National Instrument 45-106 Prospectus Exemptions or, in Ontario, as such term is defined in section 73.3(1) of the Securities Act (Ontario); and (iii) a “permitted client” as such term is defined in section 1.1 of National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations.

Taxation and Eligibility for Investment

Any discussion of taxation and related matters contained in this prospectus does not purport to be a comprehensive description of all of the tax considerations that may be relevant to a Canadian investor when deciding to purchase the Notes and, in particular, does not address any Canadian tax considerations. No representation or warranty is hereby made as to the tax consequences to a resident, or deemed resident, of Canada of an investment in the Notes or with respect to the eligibility of the Notes for investment by such investor under relevant Canadian federal and provincial legislation and regulations.

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Rights of Action for Damages or Rescission

Securities legislation in certain of the Canadian jurisdictions provides certain purchasers of securities pursuant to an offering memorandum (such as this prospectus), including where the distribution involves an “eligible foreign security” as such term is defined in Ontario Securities Commission Rule 45-501 Ontario Prospectus and Registration Exemptions and in Multilateral Instrument 45-107 Listing Representation and Statutory Rights of Action Disclosure Exemptions, as applicable, with a remedy for damages or rescission, or both, in addition to any other rights they may have at law, where the offering memorandum, or other offering document that constitutes an offering memorandum, and any amendment thereto, contains a “misrepresentation” as defined under applicable Canadian securities laws. These remedies, or notice with respect to these remedies, must be exercised or delivered, as the case may be, by the purchaser within the time limits prescribed under, and are subject to limitations and defenses under, applicable Canadian securities legislation. In addition, these remedies are in addition to and without derogation from any other right or remedy available at law to the investor.

Upon receipt of this document, each Canadian investor hereby confirms that it has expressly requested that all documents evidencing or relating in any way to the sale of the securities described herein (including for greater certainty any purchase confirmation or any notice) be drawn up in the English language only. Par la réception de ce document, chaque investisseur canadien confirme par les présentes qu’il a expressément exigé que tous les documents faisant foi ou se rapportant de quelque manière que ce soit à la vente des valeurs mobilières décrites aux présentes (incluant, pour plus de certitude, toute confirmation d’achat ou tout avis) soient rédigés en anglais seulement.

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LEGAL MATTERS

Certain legal matters regarding the securities offered hereby have been passed upon for us by Dechert LLP, Philadelphia, Pennsylvania, and certain matters with respect to Maryland law have been passed upon by Miles & Stockbridge P.C., Baltimore, Maryland. Certain legal matters in connection with the offering have been passed upon for the underwriters by Ropes & Gray LLP.

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The 2023 and 2022 consolidated financial statements and the effectiveness of the Company’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports which are incorporated herein by reference (which reports (1) express an unqualified opinion on the 2023 and 2022 consolidated financial statements, and (2) express an unqualified opinion of the effectiveness of internal control over financial reporting).

INCORPORATION BY REFERENCE

This prospectus supplement is part of a registration statement that we have filed with the SEC. The SEC allows us to “incorporate by reference” the information that we file with the SEC, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to comprise a part of this prospectus supplement, and later information that we file with the SEC will automatically update and, where applicable, supersede this information.

We incorporate by reference into this prospectus supplement additional documents that we may file with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act until all of the securities offered by this prospectus supplement have been sold or we otherwise terminate the offering of these securities; provided, however, that information “furnished” under Item 2.02 or Item 7.01 of Form 8-K or other information “furnished” to the SEC which is not deemed filed is not incorporated by reference in this prospectus supplement.

This prospectus supplement incorporates by reference the documents set forth below that have previously been filed by us with the SEC:

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AVAILABLE INFORMATION

We file with or submit to the SEC annual, quarterly and current periodic reports, proxy statements and other information meeting the informational requirements of the Exchange Act. This information is available free of charge by calling us collect at (215) 495-1150 or on our website at www.fskkradvisor.com/fsk. Information contained on our and FSKR’s website is not incorporated by reference into this prospectus supplement or the accompanying prospectus, and you should not consider that information to be part of this prospectus supplement or the accompanying prospectus. The SEC maintains an Internet website that contains reports, proxy and information statements and other information filed electronically by us with the SEC which are available free of charge on the SEC’s Internet website at http://www.sec.gov. Copies of these reports, proxy and information statements and other information may be obtained, after paying a duplicating fee, by sending a request by email to: publicinfo@sec.gov.

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PROSPECTUS

Common Stock

Preferred Stock

Warrants

Subscription Rights

Debt Securities

We are an externally managed, non-diversified, closed-end management investment company that has elected to be regulated as a business development company, or BDC, under the Investment Company Act of 1940, as amended, or the 1940 Act. Our investments and activities are managed by FS/KKR Advisor, LLC, or the Adviser, a registered investment adviser under the Investment Advisers Act of 1940, as amended, or the Advisers Act, that is jointly operated by an affiliate of Franklin Square Holdings, L.P., or FS Investments, and by KKR Credit Advisors (US) LLC, or KKR Credit.

We may offer, from time to time, in one or more offerings or series, together or separately, our common stock, preferred stock, warrants representing rights to purchase shares of our common stock, preferred stock or debt securities, subscription rights or debt securities, which we refer to, collectively, as the “securities”. We may sell our common stock through underwriters or dealers, “at-the-market” to or through a market maker into an existing trading market or otherwise directly to one or more purchasers or through agents or through a combination of methods of sale. The identities of such underwriters, dealers, market makers or agents, as the case may be, will be described in one or more supplements to this prospectus. The securities may be offered at prices and on terms to be described in one or more supplements to this prospectus. In the event we offer common stock, the offering price per share of our common stock exclusive of any underwriting commissions or discounts will not be less than the net asset value per share of our common stock at the time we make the offering except (1) in connection with a rights offering to our existing stockholders, (2) with the consent of the majority of our common stockholders and approval of our board of directors or (3) under such circumstances as the Securities and Exchange Commission, or the SEC, may permit. In past years, we obtained the approval of our stockholders to issue shares of common stock at prices below the then-current net asset value of our common stock, subject to certain conditions, during the twelve-month periods beginning on the date of such approvals. The current authorization expires on August 16, 2025. At our 2025 annual stockholder meeting, we expect that we will again seek the approval of our stockholders to issue shares of our common stock at prices below the then-current net asset value per share for a twelve-month period following stockholder approval. See “Risk Factors” and “Sales of Common Stock Below Net Asset Value” for more information.

Our common stock is traded on the New York Stock Exchange, LLC, or the NYSE, under the ticker symbol “FSK”. The last reported closing price for our common stock on September 18, 2024 was $19.64 per share. The net asset value of our common stock on June 30, 2024 (the last date prior to the date of this prospectus for which we publicly disclosed our net asset value) was $23.95 per share.

We invest in securities that are rated below investment grade by rating agencies or that would be rated below investment grade if they were rated. Below investment grade securities, which are often referred to as “junk,” have predominantly speculative characteristics with respect to the issuer’s capacity to pay interest and repay principal. They may also be difficult to value and illiquid.

Investing in our securities may be considered speculative and involves a high degree of risk, including the risk of a substantial loss of investment. See “Risk Factors” beginning on page 14 of this prospectus, in our most recent Annual Report on Form 10-K, in any of our other filings with the SEC, and in any applicable prospectus supplement to read about the risks you should consider before buying our securities, including the risk of leverage.

This prospectus describes some of the general terms that may apply to an offering of our securities. We will provide the specific terms of these offerings and securities in one or more supplements to this prospectus. We may also authorize one or more free writing prospectuses to be provided to you in connection with these offerings. The prospectus supplement and any related free writing prospectus may also add, update, or change information contained in this prospectus. You should carefully read this prospectus, the applicable prospectus supplement, and any related free writing prospectus, and the documents incorporated by reference, before buying any of the securities being offered and keep them for future reference. We file annual, quarterly and current reports, proxy statements and other information about us with the SEC. This information is available free of charge by contacting us at 201 Rouse Boulevard, Philadelphia, Pennsylvania 19112, by calling us collect at (215) 495-1150 or by visiting our website at www.fskkradvisor.com. Information contained on our website is not incorporated by reference into this prospectus or any supplements to this prospectus, and you should not consider that information to be part of this prospectus or any supplements to this prospectus. The contact information provided above may be used by you to make investor inquiries. The SEC also maintains a website at www.sec.gov that contains such information.

Neither the SEC nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

This prospectus may not be used to consummate sales of securities unless accompanied by a prospectus supplement.

THE DATE OF THIS PROSPECTUS IS SEPTEMBER 19, 2024.

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we have filed with the SEC using the automatic “shelf” registration process as a “well-known seasoned issuer,” as defined in Rule 405 under the Securities Act of 1933, as amended, or the Securities Act. Under the shelf registration process, we may offer from time to time, in one or more offerings or series, our common stock, preferred stock, warrants representing rights to purchase shares of our common stock, preferred stock or debt securities, subscription rights or debt securities on the terms to be determined at the time of the offering. We may sell our common stock through underwriters or dealers, “at-the-market” to or through a market maker, into an existing trading market or otherwise directly to one or more purchasers or through agents or through a combination of methods of sale. The identities of such underwriters, dealers, market makers or agents, as the case may be, will be described in one or more supplements to this prospectus. The securities may be offered at prices and on terms described in one or more supplements to this prospectus. This prospectus provides you with a general description of the securities that we may offer. Each time we use this prospectus to offer securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering. The prospectus supplement may also add, update or change information contained in this prospectus, and the prospectus and prospectus supplement will together serve as the prospectus.

Any statement that we make in this prospectus will be modified or superseded by any inconsistent statement made by us in a subsequent prospectus supplement. The registration statement we filed with the SEC includes exhibits that provide more detailed descriptions of the matters discussed in this prospectus. You should read this prospectus and the related exhibits filed with the SEC and any prospectus supplement, together with additional information described below under “Incorporation by Reference” and “Available Information.” In this prospectus, we use the term “day” to refer to a calendar day, and we use the term “business day” to refer to any day other than Saturday, Sunday, a legal holiday or a day on which banks in New York City are authorized or required to close, or any day that the NYSE is closed for trading.

You should rely only on the information contained in this prospectus, any accompanying prospectus supplement, any free writing prospectus, the documents incorporated by reference in this prospectus and any applicable prospectus supplement, or any other information which we have referred you when considering whether to purchase any securities offered by this prospectus. We have not authorized any other person to provide you with different information from that contained in this prospectus and accompanying prospectus supplements or free writing prospectuses. The information contained in this prospectus, accompanying prospectus supplements and free writing prospectuses is complete and accurate only as of its date. If there is a material change in our affairs, we will amend or supplement these documents only as required by law.

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FEES AND EXPENSES

The following table is intended to assist you in understanding the costs and expenses that an investor in shares of our common stock will bear directly or indirectly. We caution you that some of the percentages indicated in the table below are estimates and may vary. Except where the context suggests otherwise, whenever this prospectus contains a reference to fees or expenses paid by “you,” “us” or “FS KKR Capital Corp.,” or that “we” will pay fees or expenses, stockholders will indirectly bear such fees or expenses as investors in us.

The second part of the incentive fee, which is referred to as the incentive fee on capital gains, is determined and payable in arrears as of the end of each calendar year (or upon termination of the investment advisory agreement). This fee equals 20.0% of our incentive fee capital gains, which equals our realized capital gains

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on a cumulative basis from inception, calculated as of the end of the applicable period, computed net of all realized capital losses and unrealized capital depreciation on a cumulative basis, less the aggregate amount of any previously paid capital gains incentive fees. The amount in the table assumes that there is no incentive fee on capital gains and is based on the net unrealized depreciation as of June 30, 2024. Such amounts are expressed as a percentage of the average net assets as of such date.

Example

The following example demonstrates the projected dollar amount of total cumulative expenses that would be incurred over various periods with respect to a hypothetical investment in our common stock. Transaction expenses are not included in the following example. In the event that shares of common stock are sold to or through underwriters or agents, a corresponding prospectus supplement will restate this example to reflect the applicable sales load. See “Plan of Distribution” for additional information regarding stockholder transaction expenses.

The example and the expenses in the tables above should not be considered a representation of our future expenses, and actual expenses may be greater or less than those shown. Because the example assumes, as required by the SEC, a 5.0% annual return, no subordinated incentive fee on income would be accrued and

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payable in any of the indicated time periods. Our performance will vary and may result in a return greater or less than 5.0%. If we achieve sufficient returns on our investments, including through the realization of capital gains, to trigger an incentive fee of a material amount, our expenses, and returns to our investors, would be higher. In addition, while the example assumes reinvestment of all distributions at net asset value, reinvestment of distributions under our distribution reinvestment plan may occur at a price per share that differs from the then-current net asset value per share. See “Distribution Reinvestment Plan” for additional information regarding our distribution reinvestment plan. See “Plan of Distribution” for additional information regarding stockholder transaction expenses.

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FINANCIAL HIGHLIGHTS

The information contained in Note 12 to our audited consolidated financial statements in our most recent Annual Report on Form 10-K and in Note 11 to our unaudited consolidated financial statements in our most recent Quarterly Report on Form 10-Q is incorporated by reference herein.

The following is a schedule of financial highlights of the Company for the years ended December 31, 2018, 2017, 2016, 2015 and 2014. The below schedule does not give effect to the 4 to 1 reverse stock split consummated by the Company on June 15, 2020.

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RISK FACTORS

Investing in our securities involves a number of significant risks. In addition to the other information contained in this prospectus and the applicable prospectus supplement and any free writing prospectus, you should consider carefully the following information and the risk factors incorporated by reference in our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K we file after the date of this prospectus, and all other information contained or incorporated by reference into this prospectus, as updated by our subsequent filings under the Exchange Act and the risk factors and other information contained in any prospectus supplement and any free writing prospectus before acquiring any of such securities before making an investment in our securities. Additional risks and uncertainties not presently known to us or not presently deemed material by us may also impair our operations and performance. Each of the risk factors could materially adversely affect our business, financial condition and results of operations. In such case, the net asset value and market price of our common stock could decline or the value of our preferred stock, warrants, subscription rights or debt securities may decline, and investors may lose all or part of their investment.

Past financial performance may not be a reliable indicator of future performance, and historical trends should not be used to anticipate results or trends in future periods. If any of these risks actually occurs, our business, reputation, financial condition, results of operations, revenue, and future prospects could be seriously harmed. This could cause our net asset value and the trading price of our securities to decline, resulting in a loss of all or part of your investment. Please also read carefully the section titled “Special Note Regarding Forward-Looking Statements.”

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

Some of the statements in this prospectus, including the documents we incorporate by reference herein and any applicable prospectus supplement or free writing prospectus, including the documents we incorporate by reference therein, constitute forward-looking statements because they relate to future events or our future performance or financial condition. The forward-looking statements contained in this prospectus and any applicable prospectus supplement or free writing prospectus may include statements as to:

In addition, words such as “anticipate,” “believe,” “expect” and “intend” indicate a forward-looking statement, although not all forward-looking statements include these words. The forward-looking statements contained in or incorporated by reference into this prospectus and any applicable prospectus supplement or free writing prospectus are not guarantees of future performance and are subject to risks, uncertainties and other factors, some of which are beyond our control and difficult to predict and could cause our actual results to differ materially from those expressed or forecasted in the forward-looking statements for any reason, including those factors incorporated by reference in “Risk Factors” and elsewhere in this prospectus. Other factors that could cause actual results to differ materially include:

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Discussions containing these forward-looking statements may be found in the sections titled “Business,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” incorporated by reference from our most recent Annual Report on Form 10-K, as well as any amendments filed with the SEC. We discuss in greater detail, and incorporate by reference into this prospectus in their entirety, many of these risks and uncertainties in the sections titled “Risk Factors” in the applicable prospectus supplement, in any free writing prospectus we may authorize for use in connection with a specific offering and in our most recent Annual Report on Form 10-K, and any subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K as well as any amendments reflected in subsequent filings with the SEC. In addition, statements that we “believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based on information available to us on the date of this prospectus, free writing prospectus and documents incorporated by reference into this prospectus and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain, and investors are cautioned not to unduly rely on these statements. Except as required by the federal securities laws, we undertake no obligation to revise or update any forward-looking statements, whether as a result of new information, future events or otherwise.

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USE OF PROCEEDS

Unless otherwise specified in a prospectus supplement or any free writing prospectus relating to an offering, we intend to use substantially all of the proceeds from a sale of our securities, net of expenses, for general corporate purposes, which may include, among other things, making investments in private U.S. companies in accordance with our investment objectives and using the strategies described in this prospectus or repaying indebtedness. We anticipate that we will use substantially all of the net proceeds of an offering for the above purposes within approximately six months after the completion of such offering. However, depending on market conditions and other factors, including the availability of investments that meet our investment objectives, we may be unable to invest such proceeds within the time period we anticipate.

Pending such use, we intend to invest the net proceeds of any offering primarily in cash, cash equivalents, including money market funds, U.S. government securities, repurchase agreements and high-quality debt instruments maturing in one year or less from the time of investment, consistent with our BDC election and our election for taxation as a RIC. These temporary investments may have lower yields than our other investments and, accordingly, may result in lower distributions, if any, during such period. Our ability to achieve our investment objectives may be limited to the extent that the net proceeds from an offering, pending full investment, are held in lower yielding interest-bearing deposits or other short-term instruments.

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DISTRIBUTIONS

Subject to applicable legal restrictions and the sole discretion of our board of directors, we intend to declare and pay regular cash distributions on a quarterly basis. From time to time, we may also pay special interim distributions in the form of cash or shares of our common stock at the discretion of our board of directors. The timing and amount of any future distributions to stockholders are subject to applicable legal restrictions and the sole discretion of our board of directors.

During certain periods, our distributions may exceed our earnings. As a result, it is possible that a portion of the distributions we make may represent a return of capital. A return of capital generally is a return of a stockholder’s investment rather than a return of earnings or gains derived from our investment activities. Each year a statement on Form 1099-DIV identifying the sources of the distributions will be mailed to our stockholders. No portion of the distributions paid during the tax years ended December 31, 2023, 2022 or 2021 represented a return of capital.

We intend to continue to make our regular distributions in the form of cash, out of assets legally available for distribution, except for those stockholders who receive their distributions in the form of shares of our common stock under our distribution reinvestment plan. Any distributions reinvested under the plan will nevertheless remain taxable to a U.S. stockholder.

We have elected to be subject to tax as a RIC under Subchapter M of the Code. In order to maintain RIC tax treatment, we must, among other things, make distributions treated as dividends for U.S. federal income tax purposes of an amount at least equal to 90% of our investment company taxable income, determined without regard to any deduction for distributions paid, each tax year. As long as the distributions are declared by the later of the fifteenth day of the ninth month following the close of a tax year or the extended due date of the tax return for such tax year, including extensions, distributions paid up to twelve months after the current tax year can be carried back to the prior tax year for determining the distributions paid in such tax year. We intend to make sufficient distributions treated as dividends for U.S. federal income tax purposes to our stockholders to qualify for and maintain our RIC tax status each tax year. We are also subject to a 4% nondeductible federal excise taxes on certain undistributed income unless we make distributions in a timely manner to our stockholders generally of an amount at least equal to the sum of (1) 98% of our net ordinary income (taking into account certain deferrals and elections) for the calendar year, (2) 98.2% of our capital gain net income, which is the excess of capital gains in excess of capital losses, or “capital gain net income” (adjusted for certain ordinary losses), for the one-year period ending October 31 of that calendar year and (3) any net ordinary income and capital gain net income for the preceding years that were not distributed during such years and on which we incurred no U.S. federal income tax. Any distribution treated as dividends for U.S. federal income tax purposes that is declared by us during October, November or December of any calendar year, payable to stockholders of record on a specified date in such a month and actually paid during January of the following calendar year, will be treated as if it had been paid by us, as well as received by our U.S. stockholders, on December 31 of the calendar year in which the distribution was declared. We can offer no assurance that we will achieve results that will permit us to pay any cash distributions. If we issue senior securities, we will be prohibited from making distributions if doing so causes us to fail to maintain the asset coverage ratios stipulated by the 1940 Act or if distributions are limited by the terms of any of our borrowings. See “Regulation” in our most recent Annual Report on Form 10-K and “Material U.S. Federal Income Tax Considerations” in this prospectus.

Pursuant to our distribution reinvestment plan, we will reinvest all cash dividends or distributions declared by our board of directors on behalf of stockholders who do not elect to receive their distributions in cash. As a result, if our board of directors declares a distribution, then stockholders who have not elected to “opt out” of our distribution reinvestment plan will have their distributions automatically reinvested in additional shares of our common stock.

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Registered stockholders must notify our transfer agent in writing if they wish to “opt out” of our distribution reinvestment plan. No action is required on the part of registered stockholders to have their cash distributions reinvested in shares of our common stock.

If a stockholder holds shares of our common stock in the name of a broker or financial intermediary, they should contact such broker or financial intermediary regarding their option to elect to receive distributions in cash in lieu of shares of our common stock.

With respect to each distribution pursuant to our distribution reinvestment plan, we reserve the right to either issue new shares of common stock or purchase shares of common stock in the open market in connection with implementation of our distribution reinvestment plan. Unless in our sole discretion, we otherwise direct the plan administrator, (A) if the per share market price (as defined in our distribution reinvestment plan) is equal to or greater than the estimated net asset value per share (rounded up to the nearest whole cent) of our common stock on the payment date for the distribution, then we will issue shares of common stock at the greater of (i) net asset value per share of common stock or (ii) 95% of the market price; or (B) if the market price is less than the net asset value per share, then, in our sole discretion, (i) shares of common stock will be purchased in open market transactions for the accounts of participants to the extent practicable, or (ii) we will issue shares of common stock at net asset value per share. Pursuant to the terms of our distribution reinvestment plan, the number of shares of common stock to be issued to a participant will be determined by dividing the total dollar amount of the distribution payable to a participant by the price per share at which we issue such shares; provided, however, that shares purchased in open market transactions by the plan administrator will be allocated to a participant based on the average purchase price, excluding any brokerage charges or other charges, of all shares of common stock purchased in the open market.

If a stockholder’s cash distributions are reinvested in our common stock pursuant to our distribution reinvestment plan, such stockholder generally will be subject to the same federal, state and local tax consequences as if it elected to receive distributions in cash. If our common stock is trading at or below net asset value, a stockholder reinvesting in our common stock will be treated as receiving a distribution in the amount of cash that they would have received if they had elected to receive the distribution in cash. If our common stock is trading above net asset value, a stockholder reinvesting in our common stock will be treated as receiving a distribution in the amount of the fair market value of our common stock. The stockholder’s basis for determining gain or loss upon the sale of common stock received on reinvestment of a cash distribution will be equal to the total dollar amount of the distribution payable to the stockholder. Any stock received on reinvestment of a cash distribution will have a holding period for tax purposes commencing on the day following the day on which the shares of common stock are credited to the stockholder’s account.

We may fund our cash distributions to stockholders from any sources of funds legally available to us, including proceeds from the sale of shares of our common stock, borrowings, net investment income from operations, capital gains proceeds from the sale of assets, non-capital gains proceeds from the sale of assets and dividends or other distributions paid to us on account of preferred and common equity investments in portfolio companies. We have not established limits on the amount of funds we may use from available sources to make distributions. There can be no assurance that we will be able to pay distributions at a specific rate or at all.

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MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The information contained under the captions “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our most recent Annual Report on Form 10-K and in our most recent Quarterly Report on Form 10-Q is incorporated by reference herein.

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SENIOR SECURITIES

Information about our senior securities (including debt securities and other indebtedness) is shown in the table below as of June 30, 2024 and December 31, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015 and 2014. The information as of June 30, 2024 has been derived from our unaudited financial statements for such period. The information as of December 31, 2023, 2022, 2021, 2020 and 2019 has been derived from our audited financial statements for such period, which have been audited by Deloitte & Touche LLP, our independent registered public accounting firm as of such date. The information as of December 31, 2018, 2017, 2016, 2015, and 2014 has been derived from our audited financial statements for these periods, which have been audited by RSM US LLP, our independent registered public accounting firm as of such dates. This information about our senior securities should be read in conjunction with our audited consolidated financial statements and related notes thereto and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in our most recent Annual Report on Form 10-K.

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BUSINESS

The information contained under the captions “Business” and “Legal Proceedings” in our most recent Annual Report on Form 10-K is incorporated by reference herein.

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PRICE RANGE OF COMMON STOCK

Our common stock has been listed on the NYSE since April 16, 2014. Our common stock traded under the ticker symbol “FSIC” until December 19, 2018 and has traded under the ticker symbol “FSK” since December 20, 2018. Prior to April 16, 2014, there was no public market for our common stock. Our shares of common stock have historically traded at prices both above and below our net asset value per share. It is not possible to predict whether shares of our common stock will trade at, above or below our net asset value in the future. See “Risk Factors.”

The following table sets forth: (i) the net asset value per share of our common stock as of the applicable period end, (ii) the range of high and low closing sales prices of our common stock as reported on the NYSE during the applicable period, (iii) the closing high and low sales prices as a premium (discount) to net asset value during the appropriate period, and (iv) the distribution per share of our common stock during the applicable period.

On September 18, 2024, the last reported closing sales price of our common stock on the NYSE was $19.64 per share.

As of September 13, 2024, we had 9,687 record holders of our common stock, which does not include beneficial owners of shares of common stock held in “street” name by brokers and other institutions on behalf of beneficial owners.

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SALES OF COMMON STOCK BELOW NET ASSET VALUE

Our stockholders have in the past and may again approve our ability to sell shares of our common stock, not exceeding 25% of our then outstanding common stock, below our then-current net asset value per share in one or more public offerings of our common stock. In making a determination that an offering below net asset value per share is in our and our stockholders’ best interests, our board of directors, a majority of our directors who have no financial interest in the sale and a majority of our independent directors, may also consider a variety of factors, including:

Our board of directors may also consider the fact that a sale of shares of common stock at a discount will benefit the Adviser, as the Adviser will earn additional investment base management fees on the proceeds of such offerings, as it would from the offering of any of our other securities or from the offering of common stock at premium to net asset value per share.

Sales by us of our common stock at a discount to net asset value pose potential risks for our existing stockholders whether or not they participate in the offering, as well as for new investors who participate in the offering.

We will not sell shares of our common stock pursuant to stockholder approval (or any rights or warrants to purchase shares of our common stock) under this prospectus or an accompanying prospectus supplement without first filing a new post-effective amendment to the registration statement where such offering will result in (i) greater than 15% dilution in the aggregate to existing stockholder net asset value, (ii) us receiving an auditor’s going-concern opinion or (iii) a material adverse change making the financial statements materially misleading. The limitation in clause (i) above would be measured separately for each offering pursuant to the registration statement, as amended by this post-effective amendment, by calculating the percentage dilution or accretion to aggregate net asset value from that offering and then summing the percentage from each offering. For example, if our most recently determined net asset value per share at the time of the first offering is $10.00, and we have 100 million shares outstanding, the sale of an additional 25 million shares at net proceeds to us of $5.00 per share (a 50% discount) would produce dilution of 10.0%. If we subsequently determined that our net asset value per share increased to $11.00 on the then outstanding 125 million shares and contemplated an additional offering, we could, for example, propose to sell approximately 31.25 million additional shares at a price that would be expected to yield net proceeds to us of $8.25 per share, resulting in incremental dilution of 5.0%, before we would reach the aggregate 15% limit. If we file a new post-effective amendment, the threshold would reset.

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The following three headings and accompanying tables explain and provide hypothetical examples assuming proceeds are temporarily invested in cash equivalents on the impact of an offering at a price less than net asset value per share on three different sets of investors:

Impact on Existing Stockholders who do not Participate in the Offering

Our existing stockholders who do not participate, or who are not given the opportunity to participate, in an offering below net asset value per share by us or who do not buy additional shares in the secondary market at the same or lower price obtained by us in an offering (after expenses and any underwriting discounts and commissions) face the greatest potential risks. All stockholders will experience an immediate decrease (often called dilution) in the net asset value per share of the shares they hold. Stockholders who do not participate in the offering will also experience a disproportionately greater decrease in their participation in our earnings and assets and their voting power than stockholders who do participate in the offering. All stockholders may also experience a decline in the market price of their shares, which often reflects, to some degree, announced or potential increases and decreases in net asset value per share. A decrease could be more pronounced as the size of the offering and level of discounts increase.

The following examples illustrate the level of net asset value dilution that would be experienced by a nonparticipating stockholder in four different hypothetical common stock offerings of different sizes and levels of discount to net asset value per share, although it is not possible to predict the level of market price decline that may also occur. Actual sales prices and discounts may differ from presentation below.

The examples assume that Entity XYZ has 1,000,000 shares of common stock outstanding, $15,000,000 in total assets and $5,000,000 in total liabilities. The current net asset value and net asset value per share are thus $10,000,000 and $10.00, respectively. The table below illustrates the dilutive effect on nonparticipating stockholder A of (1) an offering of 50,000 shares (5% of the outstanding shares) at $9.50 per share after offering expenses and any underwriting discounts and commissions (a 5% discount to net asset value per share); (2) an offering of 100,000 shares (10% of the outstanding shares) at $9.00 per share after offering expenses and any underwriting discounts and commissions (a 10% discount to net asset value per share); and (3) an offering of 200,000 shares (20% of the outstanding shares) at $8.00 per share after offering expenses and any underwriting discounts and commissions (a 20% discount to net asset value per share).

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