Soligenix director surrenders options on 566 shares

The options were surrendered for cancellation for no consideration, with specified exemptions under Sections 16(b) and 16(a).

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Form Type

Rhea-AI Filing Summary

Soligenix, Inc. (SNGX) director Diane L. Parks voluntarily surrendered stock options exercisable for an aggregate of 566 shares of Common Stock to the issuer for cancellation on October 12, 2026, for no consideration. The cancellation is exempt from Section 16(b) of the Exchange Act pursuant to Rules 16b-3(e) and 16b-6(d), and from the reporting requirements of Section 16(a) pursuant to Rule 16a-4(d). Parks voluntarily reported the transaction.

Insider Trade Summary

Disposition: 566 shares

Disposition 6 txns

Insider Parks Diane L.

Role Director

Type	Security	Shares	Price	Value
Disposition	Stock Option (Right to Buy) ^F1	6	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	128	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	56	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	63	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	121	$0.00	$0.00
Disposition	Stock Option (Right to Buy)	192	$0.00	$0.00

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

Footnotes (1)

F1. On October 12, 2026, the Reporting Person voluntarily surrendered stock options exercisable for an aggregate of 566 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

Options exercisable for Common Stock: 566 shares Option shares, reported transaction row 1: 6 shares Option shares, reported transaction row 2: 128 shares +4 more

7 metrics

Options exercisable for Common Stock 566 shares Aggregate amount surrendered to the issuer for cancellation

Option shares, reported transaction row 1 6 shares Options surrendered to the issuer for cancellation on October 12, 2026

Option shares, reported transaction row 2 128 shares Options surrendered to the issuer for cancellation on October 12, 2026

Option shares, reported transaction row 3 56 shares Options surrendered to the issuer for cancellation on October 12, 2026

Option shares, reported transaction row 4 63 shares Options surrendered to the issuer for cancellation on October 12, 2026

Option shares, reported transaction row 5 121 shares Options surrendered to the issuer for cancellation on October 12, 2026

Option shares, reported transaction row 6 192 shares Options surrendered to the issuer for cancellation on October 12, 2026

Key Terms

stock options, Section 16(b) of the Exchange Act, Rule 16b-3(e), Rule 16a-4(d)

4 terms

stock options financial

"surrendered stock options exercisable for an aggregate of 566 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.

Section 16(b) of the Exchange Act regulatory

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

Rule 16b-3(e) regulatory

"pursuant to Rules 16b-3(e) and 16b-6(d)"

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 SNGX shares were covered by Diane L. Parks' option surrender?

Diane L. Parks surrendered options exercisable for an aggregate of 566 shares of Common Stock to the issuer for cancellation on October 12, 2026, for no consideration.

What Section 16 exemptions applied to Diane L. Parks' SNGX option cancellation?

The cancellation is exempt from Section 16(b) of the Exchange Act pursuant to Rules 16b-3(e) and 16b-6(d), and from the reporting requirements of Section 16(a) pursuant to Rule 16a-4(d).

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

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Available on EDGAR 10/13/2026 - 10:09 AM EDT Accepted by SEC EDGAR 10/13/2026 - 10:08 AM EDT

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^*

Parks Diane 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)

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$208.8	10/12/2026		D⁽¹⁾	V		6	07/08/2019	07/07/2029	Common Stock	6	$0	0	D
Stock Option (Right to Buy)	$232.8	10/12/2026		D	V		128	09/06/2019	09/05/2029	Common Stock	128	$0	0	D
Stock Option (Right to Buy)	$422.4	10/12/2026		D	V		56	06/18/2020	07/07/2029	Common Stock	56	$0	0	D
Stock Option (Right to Buy)	$472.8	10/12/2026		D	V		63	09/16/2020	09/15/2030	Common Stock	63	$0	0	D
Stock Option (Right to Buy)	$247.2	10/12/2026		D	V		121	09/23/2021	09/22/2031	Common Stock	121	$0	0	D
Stock Option (Right to Buy)	$156	10/12/2026		D	V		192	11/17/2022	11/16/2032	Common Stock	192	$0	0	D

Explanation of Responses:

1. On October 12, 2026, the Reporting Person voluntarily surrendered stock options exercisable for an aggregate of 566 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/ Diane L. Parks	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)

Source: View Original Filing on SEC EDGAR