普罗斯佩克特资本美股招股说明书(2025-06-16版)

Subject to completionPreliminary Pricing Supplement datedJune 16, 2025 Prospect Capital CorporationProspect Capital InterNotes7.500% Notes due 2028 (the "2028 Notes")7.750% Notes due 2030 (the "2030 Notes")8.000% Notes due 2032 (the "2032 Notes" and togetherwith the 2028 Notes and the 2030 Notes, the "Notes")® Filed under Rule424(b)(2), Registration Statement No.333-269714Preliminary Pricing Supplement No.1532, 1533 and 1534 — Dated Monday, June 16, 2025(To: Prospectus Dated February 10, 2023, Prospectus Supplement Dated February 10, 2023and Supplement to Prospectus Supplement Dated June 5, 2023) The Notes will be issued pursuant to the Indenture, dated as of February16, 2012, as amended and supplemented by that certain One Thousand Five HundredThirty-Second, One Thousand Five Hundred Thirty-Third and One Thousand Five Hundred Thirty-Fourth Supplemental Indenture dated as of June 26, 2025. The date from which interest shall accrue on the Notes is Thursday, June 26, 2025. The “Interest Payment Dates” for the Notes shall be June 15 andDecember 15 of each year, commencing December 15, 2025; the interest payable on any Interest Payment Date, will be paid to the Person in whose name the Notes (orone or more predecessor Notes) is registered at the close of business on the Regular Record Date (as defined in the Indenture) for such interest, which shall be June 1 orDecember 1, as the case may be, next preceding such Interest Payment Date. The Notes will be redeemable in whole or in part at any time or from time to time, at the option of Prospect Capital Corporation, on or after December 15,2025 at a redemption price of $1,000 per Note plus accrued and unpaid interest payments otherwise payable for the then-current semi-annual interest period accrued to,but excluding, the date fixed for redemption and upon not less than 5days nor more that 60days prior notice to the noteholder and the trustee, as described in theprospectus. Except for Notes sold to level-fee accounts, Notes offered to the public will be offered at the public offering price set forth above. Agents purchasing Noteson an agency basis for client accounts shall purchase Notes at the public offering price. Notes sold by the Agents for their own account may be sold at the publicoffering price less the discount specified above. Notes purchased by the Agents on behalf of level-fee accounts may be sold to such accounts at the discount to the publicoffering price specified above, in which case, such Agents will not retain any portion of the sales price as compensation. Prospect Capital Corporation is a financial services company that lends to and invests in middle market, privately-held companies. We are organized as anexternally-managed, non-diversified closed-end management investment company that has elected to be treated as a business development company under theInvestment Company Act of 1940. Prospect Capital ManagementL.P. manages our investments and Prospect AdministrationLLC provides the administrative servicesnecessary for us to operate. This preliminary pricing supplement relates only to the securities described in the accompanying prospectus, is only a summary of changes and should beread together with the accompanying prospectus, including among other things the section entitled “Risk Factors” beginning on page11 of such prospectus. Thispreliminary pricing supplement and the accompanying prospectus contain important information you should know before investing in our securities. Please read itbefore you invest and keep it for future reference. We file annual, quarterly and current reports, proxy statements and other information about us with the Securities andExchange Commission, or the “SEC.” This information is available free of charge by contacting us at 10 East 40thStreet, 42nd Floor, New York, NY 10016 or bytelephone at (212)448-0702. The SEC maintains a website at www.sec.gov where such information is available without charge upon written or oral request. Ourinternet website address is www.prospectstreet.com. Information contained on our website is not incorporated by reference into this preliminary pricing supplement orthe accompanying prospectus and you should not consider information contained on our website to be part of this preliminary pricing supplement or the accompanyingprospectus. Neither the SEC nor any state securities commission has approved or disapproved of these securities or passed on the adequacy or accuracy of thispreliminary pricing supplement. Any representation to the contrary is a criminal offense. Obligations of Prospect Capital Corporation and any subsidiary of ProspectCapital Corporation are not guaranteed by the full faith and credit of the United States of America. Neither Prospect Capital Corporation nor any subsidiary of ProspectCapital Corporation is a government-sponsored enterprise or an instrumentality of the United States of America. InterNotesis a registered trademark of InspereX HoldingsLLC.® R