PROSPECT CAPITAL CORP — Proxy Solicitation & Information Statement 2026

Mar 12, 2026

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No. ___)

Filed by the Registrant ☐
Filed by a Party other than the Registrant ☐
Check the appropriate box:
☐ Preliminary Proxy Statement
☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐ Definitive Proxy Statement
☑ Definitive Additional Materials
☐ Soliciting Material under §240.14a-12

Prospect Capital Corporation
(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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PROSPECT CAPITAL

VGO
VOTE

YOUR VOTE IS IMPORTANT!
VOTE BY JUNE 9, 2026

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PROSPECT CAPITAL

Our Board encourages you to vote your shares FOR the proposal and appreciates your support of Prospect Capital Corporation.

The Special Meeting of Stockholders will be held on June 9, 2026. Whether or not you plan to attend, your vote is very important. You can vote your shares by internet, telephone, or mail.

Simply follow the instructions on the enclosed form. For your convenience, we’ve highlighted where you can find your unique Control Number.

Our Board unanimously recommends that you vote as follows.

To renew the Company’s authorization, with approval of its Board of Directors, to sell shares of its common stock (during the next 12 months) at a price or prices below the Company’s then current net asset value per share in one or more offerings subject to certain conditions as set forth in the accompanying proxy statement (including that the number of shares sold on any given date does not exceed 25% of its outstanding common stock immediately prior to such sale).

THREE WAYS TO VOTE