PROSPECT CAPITAL CORP — Proxy Solicitation & Information Statement 2026

Apr 17, 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)

Payment of Filing Fee (Check the appropriate box):
☑ No fee required.
☐ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
(1) Title of each class of securities to which transaction applies:
(2) Aggregate number of securities to which transaction applies:
(3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
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Fee paid previously with preliminary materials.
Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
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(4) Date Filed:

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SPECIMEN

Be the vote that counts

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Awaiting your voting instructions

You are receiving this email because there may be additional information for your review. Your input is important to us. Please take a moment to send in your vote, if you haven't already.

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PROSPECT CAPITAL CORPORATION

JUNE 9, 2026 SPECIAL MEETING

Vote Shares by June 8, 2026

Vote Now →

Learn Before You Vote

Proxy Statement →

Ways to Vote

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800.454.8683

Attend the Meeting

Important Information

For holders as of March 11, 2026

Account Number: 3456789012345678901
CUSIP: 74348T102
Control Number: 0123456789012345

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PROSPECT CAPITAL
Shareholder Services

Shareholder Name
Address 1
Address 2
Address 3

IMPORTANT NOTICE

Re: Prospect Capital Corporation

Dear Shareholder:

We have tried unsuccessfully to contact you, whether by mail or by phone, regarding a very important matter concerning your investment with Prospect Capital Corporation. This matter pertains to an important operating initiative for Prospect for which we need your consideration and response.

It is very important that we speak to you regarding this matter. Please call toll-free at 1-866-387-0770 between 9:00 a.m. and 10:00 p.m. Eastern Time, Monday through Friday. At the time of the call, please reference the Investor ID listed below.

INVESTOR PROFILE:

Investor ID:	XXXXXXXXXX	Security ID:	XXXXXXXXXX
Shares owned:	XXXXXXXXXX	Household ID:	XXXXXXXXXX

There is no confidential information required and the call will only take a few moments of your time. Please contact us as soon as possible. Thank you for your time and consideration.

Sincerely,

John F. Barry III
Chief Executive Officer

OFFICIAL BUSINESS This document relates to your investment in Prospect Capital Corporation.