In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them a Statement on Schedule 13D (including amendments thereto) with regard to the common stock of Soligenix, Inc., and further agree that this Joint Filing Agreement be included as an exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, hereby execute this agreement as of the 26^th day of June, 2013.

	/s/ Randal J. Kirk
	Randal J. Kirk

	THIRD SECURITY, LLC

	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager

	NRM VII HOLDINGS I, LLC

	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager, Third Security LLC, which is the Manager of Third Security Capital Partners VII, LLC which is the Manager of NRM VII Holdings I, LLC

	INTREXON CORPORATION

	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Chief Executive Officer