Jerome B. Zeldis - 12 Oct 2026 Form 4 Insider Report for SOLIGENIX, INC. (SNGX)

Reporting relationship: Director
Issuer ticker: SNGX
Reported as of: 12 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Oct 2026, 10:09:54 UTC
Prior SEC filing: 18 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Jerome B. Zeldis

Key filing fact

Jerome B. Zeldis filed Form 4 for SOLIGENIX, INC. (SNGX) on 13 Oct 2026.

Key facts

This page summarizes Jerome B. Zeldis's Form 4 filing for SOLIGENIX, INC. (SNGX).
6 reported transactions and 6 derivative rows are listed below.
Accepted by SEC: 13 Oct 2026, 10:09.

Change

Previous filing in this sequence was filed on 18 Sep 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001433982 Primary reporting owner

ZELDIS JEROME B

Relationship: Director
Address: C/O SOLIGENIX, INC., 29 EMMONS DRIVE, SUITE B-10, PRINCETON
Signature: /s/ Jerome B. Zeldis
Signature date: 12 Oct 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SNGX transaction Derivative

Stock Option (Right to Buy)

Disposed to Issuer

Transaction value
Shares: -54
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 54
Exercise price: $549.60
Footnotes: F1

SNGX transaction Derivative

Stock Option (Right to Buy)

Disposed to Issuer

Transaction value
Shares: -74
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 74
Exercise price: $400.80

SNGX transaction Derivative

Stock Option (Right to Buy)

Disposed to Issuer

Transaction value
Shares: -128
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 128
Exercise price: $232.80

SNGX transaction Derivative

Stock Option (Right to Buy)

Disposed to Issuer

Transaction value
Shares: -63
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 63
Exercise price: $472.80

SNGX transaction Derivative

Stock Option (Right to Buy)

Disposed to Issuer

Transaction value
Shares: -121
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 121
Exercise price: $247.20

SNGX transaction Derivative

Stock Option (Right to Buy)

Disposed to Issuer

Transaction value
Shares: -192
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 12 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 192
Exercise price: $156.00

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

On October 12, 2026, the Reporting Person voluntarily surrendered stock options exercisable for an aggregate of 632 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.

SEC remarks

That Reporting Person's Form 4 filed on September 18, 2026 reported an expiration date of June 16, 2036 for the Stock Option (Right to Buy) covering 78,947 shares of Common Stock at an exercise price of $0.38 per share, granted on September 17, 2026. That date was a typographical error. The correct expiration date of the option is September 16, 2036.