UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

SCHEDULE 14A INFORMATION

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 x

Check the appropriate box:

¨ Preliminary Consent Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Consent Statement

x Definitive Additional Materials

¨ Soliciting Material Under Rule 14a-12

Silver Star Properties REIT, Inc.

(Name of Registrant as Specified in Its Charter)

Allen R. Hartman

Hartman XX Holdings, Inc. 

Hartman vREIT XXI, Inc.

Hartman Family Protection Trust

LISA HARTMAN

Charlotte Hartman

VICTORIA HARTMAN MASSEY

MARGARET HARTMAN

(Name of Persons(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x No fee required.

¨ Fee paid previously with preliminary materials.

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

The persons identified on the cover page hereto (collectively, the “Hartman Group”) on June 3, 2025 filed a definitive proxy statement and an accompanying BLUE universal proxy card with the Securities and Exchange Commission (the “SEC”) to be used to solicit votes for, among other matters, (i) the election of directors that the Hartman Group has nominated for election at the next annual meeting of stockholders of Silver Star Properties REIT, Inc. (the “Company”) and (ii) the rejection of the Company’s alternate strategy proposal, and in favor of liquidating the Company’s assets in an orderly manner in accordance with the terms of its articles of incorporation and returning capital to stockholders.

On July 9, 2025, the Hartman Group distributed the following letter to shareholders:

Important: Don’t Be Misled by Illegal Proxy Calls

Dear Shareholder,

Thank you for participating in this year’s vote — your engagement matters.

We want to make you aware:
⚠   Silver Star is currently prohibited from soliciting proxy votes due to incomplete financial audits, as confirmed by the SEC.

📄   View the SEC Letter

Silver Star’s proxy solicitors are calling shareholders on recorded lines to collect proxy votes under the guise of “we have no record of your vote”. Hang up. Do not engage. Your vote on the BLUE proxy card is secure. Do not vote their WHITE proxy card.

Hartman Shareholder Alliance stands for:

● Transparency to Shareholders and a Full Forensic Audit of Silver Star Financials,

● Immediate Liquidation of Newly Acquired Assets and return of capital to investors,

● Sale of Legacy Assets as they are stabilized and leased up, then capital returned to you,

● Serving in alignment with the Interests of Shareholders and competence in real estate management and value enhancement.

STOP REWARDING SILVER STAR BOARD FOR DEVALUING YOUR INVESTMENT AND VOTE FOR RESPONSIBLE LIQUIDATION OF THE COMPANY AND RETURN OF CAPITAL.

See the attached proxy letter for more details. Click here to read the full letter.

Call us directly at (619) 664-4780 to vote for the return of your capital or vote the blue proxy from our online e-mail.

Thank you again for staying informed and involved.

If you have any questions, contact us at IR@hartman-investments.com.

— The Hartman Shareholder Alliance

***

Additional Information

The Hartman Group has filed a definitive proxy statement and accompanying BLUE universal proxy card with the Securities and Exchange Commission (“SEC”) to be used to solicit proxies with respect to the election of the Hartman Group’s slate of highly qualified director candidates and the other proposals to be presented at the 2025 annual meeting of stockholders (the “Annual Meeting”) of Silver Star Properties REIT, Inc. (the “Company”). Stockholders are advised to read the proxy statement and any other documents related to the solicitation of stockholders of the Company in connection with the Annual Meeting because they contain important information, including information relating to the participants in the Hartman Group’s proxy solicitation. These materials and other materials filed by the Hartman Group with the SEC in connection with the solicitation of proxies are available at no charge on the SEC’s website (http://www.sec.gov). The definitive proxy statement, the accompanying BLUE universal proxy card and other relevant documents filed by the Hartman Group with the SEC are also available, without charge, by contacting the Hartman Group’s proxy solicitor, InvestorCom LLC, at its toll-free number (877) 972-0090 or via email at Proxy@investor-com.com.