X0306 4 2017-05-04 1 0000812796 SOLIGENIX, INC. SNGX 0001091823 KIRK RANDAL J C/O THIRD SECURITY, LLC 1881 GROVE AVENUE RADFORD VA 24141 0 0 1 0 0001356090 INTREXON CORP C/O LEGAL DEPARTMENT 20374 SENECA MEADOWS PARKWAY GERMANTOWN MD 20876 0 0 1 0 Common Stock 2017-05-04 4 X 0 250000 0.80 A 583334 I by NRM VII Holdings Common Stock 2017-05-04 4 S 0 49875 4.01 D 533459 I by NRM VII Holdings Common Stock 2017-05-04 4 S 0 11739 2.97 D 521720 I by NRM VII Holdings Common Stock 2017-05-05 4 S 0 71607 2.70 D 450113 I by NRM VII Holdings Common Stock 2017-05-08 4 S 0 9695 2.54 D 440418 I by NRM VII Holdings Common Stock 2017-05-04 4 S 0 2278 2.97 D 101171 I by Intrexon Common Stock 2017-05-05 4 S 0 13893 2.70 D 87278 I by Intrexon Common Stock 2017-05-08 4 S 0 1881 2.54 D 85397 I by Intrexon Warrant to Purchase Common Stock 0.80 2017-05-04 4 X 0 250000 0 D 2013-06-25 2018-06-25 Common Stock 250000 0 I by NRM VII Holdings The indicated share amount is reflective of a 1:10 reverse stock split effected by the issuer on October 7, 2016. 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. 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. 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. 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. /s/ Randal J. Kirk 2017-05-08 /s/ Randal J. Kirk, CEO of Intrexon Corporation 2017-05-08