SOLIGENIX, INC. — Director's Dealing 2017

May 8, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SOLIGENIX, INC. (SNGX)
CIK: 0000812796
Period of Report: 2017-05-04

Reporting Person: KIRK RANDAL J (10% Owner)
Reporting Person: INTREXON CORP (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-04	Common Stock	X	250000	$0.80	Acquired	583334	Indirect
2017-05-04	Common Stock	S	49875	$4.01	Disposed	533459	Indirect
2017-05-04	Common Stock	S	11739	$2.97	Disposed	521720	Indirect
2017-05-05	Common Stock	S	71607	$2.70	Disposed	450113	Indirect
2017-05-08	Common Stock	S	9695	$2.54	Disposed	440418	Indirect
2017-05-04	Common Stock	S	2278	$2.97	Disposed	101171	Indirect
2017-05-05	Common Stock	S	13893	$2.70	Disposed	87278	Indirect
2017-05-08	Common Stock	S	1881	$2.54	Disposed	85397	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-04	Warrant to Purchase Common Stock	$0.80	X	250000	Disposed	2018-06-25	Common Stock (250000)	Indirect

Footnotes

F1: The indicated share amount is reflective of a 1:10 reverse stock split effected by the issuer on October 7, 2016.

F2: Shares surrendered to the issuer in order to satisfy the exercise price in connection with the cashless exercise of a warrant to purchase 250,000 shares of common stock of the issuer.

F3: Pursuant to a joint selling program, NRM VII Holdings I, LLC ("NRM VII Holdings") and Intrexon Corporation ("Intrexon") sold shares on a pro rata basis.

F4: Randal J. Kirk controls NRM VII Holdings. Shares held by this entity may be deemed to be indirectly beneficially owned (as defined under Rule 13d- 3 promulgated under the Securities Exchange Act of 1934, as amended) by Mr. Kirk. Mr. Kirk disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F5: Randal J. Kirk, directly and through certain affiliates, has voting and dispositive power over a majority of the outstanding capital stock of Intrexon. Mr. Kirk may therefore be deemed to have voting and dispositive power over the shares of the issuer owned by Intrexon. Shares held by Intrexon may be deemed to be indirectly beneficially owned (as defined under Rule 13d-3 promulgated under the Securities Exchange Act of 1934, as amended) by Mr. Kirk. Mr. Kirk disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.