Exhibit 1

Joint Filing Agreement

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 Intrexon Corporation, 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 5^th day of January, 2015.

Date: January 5, 2015

	/s/ Randal J. Kirk
	Randal J. Kirk
	THIRD SECURITY, LLC
	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager
	KAPITAL JOE, LLC
	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager
	MASCARA KABOOM, LLC
	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager
	NEW RIVER MANAGEMENT V, LP
	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager
	NRM VI HOLDINGS I, LLC
	By:	/s/ Randal J. Kirk
		Randal J. Kirk
		Manager