UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

The Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): July 31, 2025

Commission File No. 001-14778

Soligenix, Inc.

(Exact name of small business issuer as specified in its charter)

delaware		41-1505029
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification Number)

29 Emmons Drive,

Suite B-10

Princeton, NJ

08540

(Address of principal executive offices)

(Zip Code)

(609) 538-8200

(Issuer’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $.001 per share		SNGX		The Nasdaq Capital Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 8.01.

Other Events.

On July 31, 2025, Soligenix, Inc. (the “Company”) issued a press release announcing that it has completed its Phase 2a proof of concept study evaluating SGX945 (dusquetide) in the treatment of Behçet's Disease and achieved the study objective of demonstrating biological efficacy. A copy of the press release is filed as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Safe Harbor for Forward-Looking Statements

Certain statements contained in this report may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact, are statements that could be deemed forward-looking statements, including statements containing the words “predicts,” “plans,” “expects,” “anticipates,” “believes,” “goal,” “target,” “estimate,” “potential,” “may,” “might,” “could,” “see,” “seek,” “forecast,” and similar words. Forward-looking statements are based on the Company’s current plans and expectations and involve risks and uncertainties which are, in many instances, beyond the Company’s control, and which could cause actual results to differ materially from those included in or contemplated or implied by the forward-looking statements. Such risks and uncertainties include, among others, the risks, uncertainties and factors detailed in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”), including in the Company’s Annual Report for the year ended December 31, 2024 on Form 10-K, which was filed with the SEC, and in other periodic reports on Form 10-Q and Form 8-K. As a result of such risks, uncertainties and factors, the Company’s actual results may differ materially from any future results, performance or achievements discussed in or implied by the forward-looking statements contained herein. The Company is providing the information in this report as of the date hereof and assumes no obligations to update the information included in this report or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Item 9.01.

Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.		Description
99.1		Press Release dated July 31, 2025.
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Soligenix, Inc.

July 31, 2025	By:	/s/ Christopher J. Schaber
		Christopher J. Schaber, Ph.D.
		President and Chief Executive Officer
		(Principal Executive Officer)

SOLIGENIX, INC. 8-K