Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*
Webster Darryl

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
SVP--Intellectual Property
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Option to Purchase Common Stock (1) 06/30/2020 Common Stock 11,428 3.29 D
Option to Purchase Common Stock (2) 07/01/2021 Common Stock 45,714 7.12 D
Series D Convertible Preferred Stock (3) (3) Common Stock 9,170 (3) D
Explanation of Responses:
1. 8,571 options are immediately exercisable; remaing options vest on March 29, 2014.
2. 22,857 options are immediately exercisable; remaining options vest annually in increments of 11,428 and 11,429 on each of July 1, 2014 and 2015, respectively.
3. The Series D Convertible Preferred Stock is convertible into Common Stock on a 1-for-1.75 basis into the number of shares of Common Stock as shown in column 3 at any time at the holder's election, and automatically upon (i) the closing of the Issuer's firm commitment underwritten initial public offering in the event it results in net proceeds of at least $100,000,000 and (ii) upon the election of the holders of a majority of the then outstanding shares of such series. Upon conversion, all dividends that have accrued with respect to Series D Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series D Convertible Preferred Stock has no expiration date.
/s/ Darryl Webster 08/07/2013
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.


I, Darryl Webster, do hereby constitute and appoint Donald P. Lehr and Rick L. Sterling, my true and lawful attorneys-in-fact, either of whom acting singly is hereby authorized, for me and in my name and on my behalf as a director, officer and/or shareholder of INTREXON CORPORATION to (i) prepare, execute in my name and on my behalf, and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID, including any necessary amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling me to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934 or any rule or regulation of the SEC in respect thereof; and (ii) prepare, execute and file any and all forms, instruments or documents, including any necessary amendments thereto, as such attorneys or attorney deems necessary or advisable to enable me to comply with Section 16 of the Securities Exchange Act of 1934 or any rule or regulation of the SEC in respect thereof  (collectively, "Section 16").

I do hereby ratify and confirm all acts my said attorney shall do or cause to be done by virtue hereof.  I acknowledge that the foregoing attorneys-in-fact, serving in such capacity at my request, are not assuming, nor is INTREXON CORPORATION assuming, any of my responsibilities to comply with Section 16.

This power of attorney shall remain in full force and effect until it is revoked by the undersigned in a signed writing delivered to each such attorney-in-fact or the undersigned is no longer required to comply with Section 16, whichever occurs first.

WITNESS the execution hereof this 7th day of August, 2013.

/s/ Darryl Webster

Darryl Webster