Gladstone Commercial Corporation

03/20/2026 | Press release | Distributed by Public on 03/20/2026 06:35

Additional Proxy Soliciting Materials (Form DEFA14A)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

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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 Pursuant to §240.14a-12

Gladstone Commercial Corporation

(Name of Registrant as Specified in its Charter)

Not Applicable

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Counts! GLADSTONE COMMERCIAL CORPORATION 2026 Annual Meeting Vote by May 6, 2026 11:59 PM ET GLADSTONE COMMERCIAL CORPORATION 1521 WESTBRANCH DRIVE, SUITE 100 MCLEAN, VA 22102 V84749-P44857 You invested in GLADSTONE COMMERCIAL CORPORATION and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on May 7, 2026. Get informed before you vote View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 23, 2026. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to [email protected]. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* May 7, 2026 11:00 a.m. Eastern Time Virtually at: www.virtualshareholdermeeting.com/GOOD2026 *Please check the meeting materials for any special requirements for meeting attendance.

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Board Recommends Voting Items 1. Election of Directors For Nominees: 01) Michela English 02) Anthony Parker 2. To ratify our Audit Committee's selection of PricewaterhouseCoopers LLP as our independent registered public accounting firm for our fiscal year ending December 31, 2026. For NOTE: To transact such other business as may properly come before the meeting or any adjournment or postponement thereof.

Gladstone Commercial Corporation published this content on March 20, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on March 20, 2026 at 12:35 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]