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   633,397 (1) A $ 0 633,397 I by Incentive 2010 (2)
Common Stock 08/13/2013   C   44,926 (4) A $ 16 678,323 I by Incentive 2010 (2)
Common Stock 08/13/2013   C   1,266,795 (1) A $ 0 1,266,795 I by Staff 2010 (2)
Common Stock 08/13/2013   C   89,853 (4) A $ 16 1,356,648 I by Staff 2010 (2)
Common Stock 08/13/2013   C   168,865 (1) A $ 0 168,865 I by Staff 2001 (2)
Common Stock 08/13/2013   C   9,859 (4) A $ 16 178,724 I by Staff 2001 (2)
Common Stock 08/13/2013   C   1,130,094 (1) A $ 0 1,130,094 I by NRM IV (2)
Common Stock 08/13/2013   C   65,983 (4) A $ 16 1,196,077 I by NRM IV (2)
Common Stock 08/13/2013   C   1,608,932 (1) A $ 0 1,608,932 I by NewVa (2)
Common Stock 08/13/2013   C   70,646 (4) A $ 16 1,679,578 I by NewVa (2)
Common Stock 08/13/2013   C   169,061 (1) A $ 0 169,061 I by ADC 2010 (2)
Common Stock 08/13/2013   C   10,138 (4) A $ 16 179,199 I by ADC 2010 (2)
Common Stock 08/13/2013   C   123,208 (1) A $ 0 123,208 I by Kellie L. Banks LTT (2)
Common Stock 08/13/2013   C   7,873 (4) A $ 16 131,081 I by Kellie L. Banks LTT (2)

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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     149,766   (3)   (3) Common Stock 85,580 (3) 0 I by Incentive 2010 (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 1,272 $ 16 (4) 0 I by Incentive 2010 (2)
Series E Convertible Preferred Stock (3) 08/13/2013   C     958,680   (3)   (3) Common Stock 547,817 (3) 0 I by Incentive 2010 (2)
Series E Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 43,654 $ 16 (4) 0 I by Incentive 2010 (2)
Series F Convertible Preferred Stock (3) 08/13/2013   C     299,532   (3)   (3) Common Stock 171,161 (3) 0 I by Staff 2010 (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 2,544 $ 16 (4) 0 I by Staff 2010 (2)
Series E Convertible Preferred Stock (3) 08/13/2013   C     1,917,360   (3)   (3) Common Stock 1,095,634 (3) 0 I by Staff 2010 (2)
Series E Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 87,309 $ 16 (4) 0 I by Staff 2010 (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     295,514   (3)   (3) Common Stock 168,865 (3) 0 I by Staff 2001 (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 9,859 $ 16 (4) 0 I by Staff 2001 (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     1,977,666   (3)   (3) Common Stock 1,130,094 (3) 0 I by NRM IV (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 65,983 $ 16 (4) 0 I by NRM IV (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     909,272   (3)   (3) Common Stock 519,584 (3) 0 I by NewVa (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 30,337 $ 16 (4) 0 I by NewVa (2)
Series B-1 Convertible Preferred Stock (3) 08/13/2013   C     1,212,360   (3)   (3) Common Stock 692,777 (3) 0 I by NewVa (2)
Series B-1 Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 26,065 $ 16 (4) 0 I by NewVa (2)
Series B Convertible Preferred Stock (3) 08/13/2013   C     694,000   (3)   (3) Common Stock 396,571 (3) 0 I by NewVa (2)
Series B Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 14,244 $ 16 (4) 0 I by NewVa (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     295,858   (3)   (3) Common Stock 169,061 (3) 0 I by ADC 2010 (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 10,138 $ 16 (4) 0 I by ADC 2010 (2)
Series F Convertible Preferred Stock (3) 08/13/2013   C     19,808   (3)   (3) Common Stock 11,318 (3) 0 I by Kellie L. Banks LTT (2)
Series F Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 168 $ 16 (4) 0 I by Kellie L. Banks LTT (2)
Series D Convertible Preferred Stock (3) 08/13/2013   C     178,254   (3)   (3) Common Stock 101,859 (3) 0 I by Kellie L. Banks LTT (2)
Series D Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 7,120 $ 16 (4) 0 I by Kellie L. Banks LTT (2)
Series C Convertible Preferred Stock (3) 08/13/2013   C     17,555   (3)   (3) Common Stock 10,031 (3) 0 I by Kellie L. Banks LTT (2)
Series C Convertible Preferred Stock Dividend $ 16 (4) 08/13/2013   C     0 (4)   (4)   (4) Common Stock (4) 585 $ 16 (4) 0 I by Kellie L. Banks LTT (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 Third Security Incentive 2010 LLC ("Incentive 2010"), Third Security Staff 2010 LLC ("Staff 2010"), Third Security Staff 2001 LLC ("Staff 2001"), New River Management IV, LP ("NRM IV"), NewVa Capital Partners, LP ("NewVa"), ADC 2010 LLC ("ADC 2010") and the Kellie L. Banks (2009) Long Term Trust ("Kellie L. Banks LTT"). 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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