Soligenix CFO surrenders options for 914 shares

The CFO’s cancellation was exempt from Section 16(b) and Section 16(a) reporting requirements under Rules 16b-3(e), 16b-6(d) and 16a-4(d).

Rhea-AI Filing Summary

Soligenix, Inc. CFO Jonathan L. Guarino voluntarily surrendered stock options exercisable for an aggregate of 914 common shares on October 12, 2026. The options were surrendered to the issuer for cancellation for no consideration. The five option tranches carried exercise prices of $232.80, $297.60, $561.60, $187.20 and $129.60.

Insider Trade Summary

Disposition: 914 shares

Disposition 5 txns

Insider Guarino Jonathan L.

Role CFO

Type	Security	Shares	Price	Value
Disposition	Stock Option (Right to Buy) F1	166	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	41	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	166	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	208	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	333	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 0 contracts (Direct)

Footnotes (1)

1. F1. On October 12, 2026, the Reporting Person voluntarily surrendered stock options exercisable for an aggregate of 914 shares of Common Stock with exercise prices set forth in the table above to the Issuer for cancellation for no consideration. The cancellation is exempt from Section 16(b) of the Exchange Act pursuant to Rule 16b-3(e) and Rule 16b-6(d), and exempt from the reporting requirements of Section 16(a) pursuant to Rule 16a-4(d). The Reporting Person is voluntarily reporting this transaction.

Key Figures

Option tranche 1: 166 options exercisable for 166 common shares; $232.80 exercise price Option tranche 2: 41 options exercisable for 41 common shares; $297.60 exercise price Option tranche 3: 166 options exercisable for 166 common shares; $561.60 exercise price +3 more

6 metrics

Option tranche 1 166 options exercisable for 166 common shares; $232.80 exercise price Surrendered October 12, 2026

Option tranche 2 41 options exercisable for 41 common shares; $297.60 exercise price Surrendered October 12, 2026

Option tranche 3 166 options exercisable for 166 common shares; $561.60 exercise price Surrendered October 12, 2026

Option tranche 4 208 options exercisable for 208 common shares; $187.20 exercise price Surrendered October 12, 2026

Option tranche 5 333 options exercisable for 333 common shares; $129.60 exercise price Surrendered October 12, 2026

Aggregate option shares 914 shares Options surrendered for cancellation

Key Terms

stock options, exercise prices, Section 16(b), Rule 16a-4(d)

4 terms

stock options technical

"surrendered stock options exercisable for an aggregate of 914 shares"

Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.

exercise prices financial

"with exercise prices set forth in the table above"

Section 16(b) regulatory

"exempt from Section 16(b) of the Exchange Act"

A federal rule that requires company insiders—like officers, directors and large shareholders—to return any profits made from buying and selling the company’s stock within a six-month window. It matters to investors because it discourages short-term trades that could exploit non-public information and helps protect outside shareholders by creating a simple, enforceable way to recover unfair gains, much like a rule stopping someone from flipping a limited-edition item for quick profit after getting early access.

Rule 16a-4(d) regulatory

"pursuant to Rule 16a-4(d)"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares of SNGX stock options did the CFO surrender?

Soligenix CFO Jonathan L. Guarino surrendered options exercisable for an aggregate of 914 common shares on October 12, 2026, for cancellation for no consideration. The five option tranches had exercise prices of $232.80, $297.60, $561.60, $187.20 and $129.60.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/13/2026 - 10:07 AM EDT Accepted by SEC EDGAR 10/13/2026 - 10:07 AM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Guarino Jonathan L.

(Last) (First) (Middle)

C/O SOLIGENIX, INC.

29 EMMONS DRIVE, SUITE B-10

(Street)

PRINCETON NEW JERSEY 08540

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SOLIGENIX, INC. [ SNGX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$232.8	10/12/2026		D(1)	V		166	09/09/2019	09/08/2029	Common Stock	166	$0	0	D
Stock Option (Right to Buy)	$297.6	10/12/2026		D	V		41	12/12/2019	12/11/2029	Common Stock	41	$0	0	D
Stock Option (Right to Buy)	$561.6	10/12/2026		D	V		166	12/10/2020	12/09/2030	Common Stock	166	$0	0	D
Stock Option (Right to Buy)	$187.2	10/12/2026		D	V		208	01/21/2022	12/08/2031	Common Stock	208	$0	0	D
Stock Option (Right to Buy)	$129.6	10/12/2026		D	V		333	12/08/2022	12/07/2032	Common Stock	333	$0	0	D

Explanation of Responses:

1. On October 12, 2026, the Reporting Person voluntarily surrendered stock options exercisable for an aggregate of 914 shares of Common Stock with exercise prices set forth in the table above to the Issuer for cancellation for no consideration. The cancellation is exempt from Section 16(b) of the Exchange Act pursuant to Rule 16b-3(e) and Rule 16b-6(d), and exempt from the reporting requirements of Section 16(a) pursuant to Rule 16a-4(d). The Reporting Person is voluntarily reporting this transaction.

	/s/ Jonathan L. Guarino	10/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)