Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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. Date of Event Requiring Statement (Month/Day/Year)
08/07/2013
3. Issuer Name and Ticker or Trading Symbol
INTREXON CORP [XON]
(Last)
(First)
(Middle)
C/O THIRD SECURITY, LLC, 1881 GROVE AVENUE
4. 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
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

RADFORD, VA 24141
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 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)
Common Stock 1,531,866
I
by NRM V (9)
Common Stock 843,432
I
by NRM VI Holdings (9)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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 of Derivative Security: 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
Series D Convertible Preferred Stock   (1)   (1) Common Stock 2,316,448 $ (1) I by R.J. Kirk DOT (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 2,535,925 $ (1) I by NRM VI Holdings (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 43,336 $ (1) I by JPK 2008 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 206,751 $ (1) I by JPK 2009 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 633,600 $ (1) I by JPK 2012 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 44,239 $ (1) I by MGK 2008 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 225,711 $ (1) I by MGK 2009 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 500,457 $ (1) I by MGK 2011 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 26,888 $ (1) I by ZSK 2008 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 29,088 $ (1) I by ZSK 2009 (9)
Series D Convertible Preferred Stock   (1)   (1) Common Stock 101,859 $ (1) I by Kellie L. Banks LTT (9)
Series C-3 Convertible Preferred stock   (2)   (2) Common Stock 7,583,586 $ (2) I by NRM VI Holdings (9)
Series C-2 Convertible Preferred stock   (3)   (3) Common Stock 10,638,297 $ (3) I by NRM V (9)
Series C-1 Convertible Preferred stock   (4)   (4) Common Stock 9,105,444 $ (4) I by NRM V (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 169,061 $ (5) I by ADC 2010 (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 36,742 $ (5) I by JPK 2009 (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 62,400 $ (5) I by JPK 2012 (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 10,031 $ (5) I by Kellie L. Banks LTT (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 36,742 $ (5) I by MGK 2009 (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 49,257 $ (5) I by MGK 2011 (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 1,130,094 $ (5) I by NRM IV (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 519,584 $ (5) I by NewVa (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 375,266 $ (5) I by R.J. Kirk DOT (9)
Series C Convertible Preferred stock   (5)   (5) Common Stock 168,865 $ (5) I by Staff 2001 (9)
Series B-1 Convertible Preferred stock   (6)   (6) Common Stock 692,777 $ (6) I by NewVa (9)
Series B Convertible Preferred stock   (7)   (7) Common Stock 396,571 $ (7) I by NewVa (9)
Option to Purchase Common Stock   (8) 02/20/2018 Common Stock 8,571 $ 2.74 D  
Option to Purchase Common Stock   (8) 02/20/2019 Common Stock 2,857 $ 3.29 D  

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 08/07/2013
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) 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 the 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.
(2) The Series C-3 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 the Series C-3 Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series C-3 Convertible Preferred Stock has no expiration date.
(3) The Series C-2 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 the Series C-2 Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series C-2 Convertible Preferred Stock has no expiration date.
(4) The Series C-1 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 the Series C-1 Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series C-1 Convertible Preferred Stock has no expiration date.
(5) The Series C 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 the Series C Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series C Convertible Preferred Stock has no expiration date.
(6) The Series B-1 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 the Series B-1 Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series B-1 Convertible Preferred Stock has no expiration date.
(7) The Series B 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 the Series B Preferred Stock will convert into shares of Common Stock at the then current fair market value. The Series B Convertible Preferred Stock has no expiration date.
(8) These options are immediately exercisable.
(9) Randal J. Kirk controls each of New River Management V, LP ("NRM V"), NRM VI Holdings I, LLC ("NRM VI Holdings"), R.J. Kirk Declaration of Trust ("R.J. DOT"), JPK 2008 LLC ("JPK 2008"), JPK 2009 LLC ("JPK 2009"), JPK 2012 LLC ("JPK 2012"), MGK 2008 LLC ("MGK 2008"), MGK 2009 LLC ("MGK 2009"), MGK 2011 LLC ("MGK 2011"), ZSK 2008 LLC ("ZSK 2008"), ZSK 2009 LLC ("ZSK 2009"), the Kellie L. Banks (2009) Long Term Trust ("Kellie L. Banks LTT"), ADC 2010 LLC ("ADC 2010"), New River Management IV, LP ("NRM IV"), NewVa Capital Partners, LP ("NewVa") and Third Security Staff 2001 LLC ("Staff 2001"). 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.

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