Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
KIRK RANDAL J
  2. Issuer Name and Ticker or Trading Symbol
INTREXON CORP [XON]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Executive Officer
(Last)
(First)
(Middle)
C/O THIRD SECURITY, LLC, 1881 GROVE AVENUE
3. Date of Earliest Transaction (Month/Day/Year)
08/13/2013
(Street)

RADFORD, VA 24141
4. If Amendment, Date 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
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/13/2013   C   97,252 (1) A $ 0 97,252 I by MGK 2008 (2)
Common Stock 08/13/2013   C   5,185 (4) A $ 16 102,437 I by MGK 2008 (2)
Common Stock 08/13/2013   C   725,578 (1) A $ 0 725,578 I by MGK 2009 (2)
Common Stock 08/13/2013   C   38,628 (4) A $ 16 764,206 I by MGK 2009 (2)
Common Stock 08/13/2013   C   889,213 (1) A $ 0 889,213 I by MGK 2011 (2)
Common Stock 08/13/2013   C   51,213 (4) A $ 16 940,426 I by MGK 2011 (2)
Common Stock 08/13/2013   C   69,959 (1) A $ 0 69,959 I by ZSK 2009 (2)
Common Stock 08/13/2013   C   3,709 (4) A $ 16 73,668 I by ZSK 2009 (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series F Convertible Preferred Stock (3) 08/13/2013   C     42,794   (3)   (3) Common Stock 24,453 (3) 0 I by MGK 2008 (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 363 $ 16 (4) 0 I by MGK 2008 (2)
Series E Convertible Preferred Stock (3) 08/13/2013   C     49,980   (3)   (3) Common Stock 28,560 (3) 0 I by MGK 2008 (2)
Series E Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 2,275 $ 16 (4) 0 I by MGK 2008 (2)
Series D Convertible Preferred Stock (3) 08/13/2013   C     77,419   (3)   (3) Common Stock 44,239 (3) 0 I by MGK 2008 (2)
Series D Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 2,547 $ 16 (4) 0 I by MGK 2008 (2)
Series F Convertible Preferred Stock (3) 08/13/2013   C     362,286   (3)   (3) Common Stock 207,020 (3) 0 I by MGK 2009 (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 3,077 $ 16 (4) 0 I by MGK 2009 (2)
Series E Convertible Preferred Stock (3) 08/13/2013   C     448,185   (3)   (3) Common Stock 256,105 (3) 0 I by MGK 2009 (2)
Series E Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 20,408 $ 16 (4) 0 I by MGK 2009 (2)
Series D Convertible Preferred Stock (3) 08/13/2013   C     394,995   (3)   (3) Common Stock 225,711 (3) 0 I by MGK 2009 (2)
Series D Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 12,998 $ 16 (4) 0 I by MGK 2009 (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     64,300   (3)   (3) Common Stock 36,742 (3) 0 I by MGK 2009 (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 2,145 $ 16 (4) 0 I by MGK 2009 (2)
Series F Convertible Preferred Stock (3) 08/13/2013   C     141,588   (3)   (3) Common Stock 80,907 (3) 0 I by MGK 2011 (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 1,202 $ 16 (4) 0 I by MGK 2011 (2)
Series E Convertible Preferred Stock (3) 08/13/2013   C     452,537   (3)   (3) Common Stock 258,592 (3) 0 I by MGK 2011 (2)
Series E Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 12,149 $ 16 (4) 0 I by MGK 2011 (2)
Series D Convertible Preferred Stock (3) 08/13/2013   C     875,800   (3)   (3) Common Stock 500,457 (3) 0 I by MGK 2011 (2)
Series D Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 34,987 $ 16 (4) 0 I by MGK 2011 (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     86,200   (3)   (3) Common Stock 49,257 (3) 0 I by MGK 2011 (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 2,875 $ 16 (4) 0 I by MGK 2011 (2)
Series F Convertible Preferred Stock (3) 08/13/2013   C     33,016   (3)   (3) Common Stock 18,866 (3) 0 I by ZSK 2009 (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 280 $ 16 (4) 0 I by ZSK 2009 (2)
Series E Convertible Preferred Stock (3) 08/13/2013   C     38,510   (3)   (3) Common Stock 22,005 (3) 0 I by ZSK 2009 (2)
Series E Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 1,753 $ 16 (4) 0 I by ZSK 2009 (2)
Series D Convertible Preferred Stock (3) 08/13/2013   C     50,904   (3)   (3) Common Stock 29,088 (3) 0 I by ZSK 2009 (2)
Series D Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 1,676 $ 16 (4) 0 I by ZSK 2009 (2)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
KIRK RANDAL J
C/O THIRD SECURITY, LLC
1881 GROVE AVENUE
RADFORD, VA 24141
  X   X   Chief Executive Officer  

Signatures

 /s/ Randal J. Kirk   08/15/2013
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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).
(1) The indicated shares represent the number of shares received upon conversion of the Issuer's Convertible Preferred Stock, indicated by Series in Table II.
(2) Randal J. Kirk controls each of MGK 2008 LLC ("MGK 2008"), MGK 2009 LLC ("MGK 2009"), MGK 2011 LLC ("MGK 2011") and ZSK 2009 LLC ("ZSK 2008"). Shares held by these entities 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.
(3) Effective upon the closing of the Issuer's firm commitment underwritten initial public offering of its Common Stock, the shares of Convertible Preferred Stock automatically converted at a ratio of 1.75-to-1 into the number of shares of Common Stock shown in column 7. The shares of Convertible Preferred Stock had no expiration date.
(4) Effective upon the closing of the Issuer's firm commitment underwritten initial public offering all accrued dividends with respect to the shares of Convertible Preferred Stock were converted into shares of Common Stock at the then current fair market value, or $16.00 per share. Payment for partial shares was issued in the form of a monetary refund by the Issuer.

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