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 *
SOUTHWELL DAVID P
   2. Issuer Name and Ticker or Trading Symbol
PTC THERAPEUTICS, INC. [PTCT] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O PTC THERAPEUTICS, INC., 100 CORPORATE COURT		 3. Date of Earliest Transaction (Month/Day/Year)
07/06/2015
(Street)

SOUTH PLAINFIELD, NJ 07080		 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 07/06/2015   M   15,000 A $ 10.85 23,604 D  
Common Stock 07/06/2015   S(1)   22,904 D $ 47.5 (2) 700 D  
Common Stock 07/06/2015   S(1)   700 D $ 48.22 (3) 0 D  

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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
Stock Option (right to buy) $ 10.85 07/06/2015   M     15,000   (4) 05/15/2023 Common Stock 15,000 $ 0 15,000 D  
Stock Option (right to buy) $ 51             01/02/2016 01/01/2025 Common Stock 12,000   12,000 D  
Stock Option (right to buy) $ 27.05             01/28/2015 01/27/2024 Common Stock 10,000   10,000 D  
Stock Option (right to buy) $ 218.4               (5) 01/10/2022 Common Stock 110   110 D  
Stock Option (right to buy) $ 490.8               (5) 04/27/2021 Common Stock 110   110 D  
Stock Option (right to buy) $ 1,149.6               (5) 02/02/2020 Common Stock 95   95 D  
Stock Option (right to buy) $ 508.8               (5) 10/07/2019 Common Stock 108   108 D  
Stock Option (right to buy) $ 735.6               (5) 01/25/2018 Common Stock 83   83 D  
Stock Option (right to buy) $ 626.4               (5) 04/18/2017 Common Stock 83   83 D  
Stock Option (right to buy) $ 392.4               (5) 03/01/2016 Common Stock 125   125 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SOUTHWELL DAVID P
C/O PTC THERAPEUTICS, INC.
100 CORPORATE COURT
SOUTH PLAINFIELD, NJ 07080		   X      

Signatures

 /s/ Colleen Diver Johnson, Attorney-in-Fact   07/06/2015
**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 transactions reported in this Form 4 were effected pursuant to a written Rule 10b5-1 plan adopted by the reporting person for the primary purpose of diversification.
(2) This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $47.13 to $48.09 per share. The reporting person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
(3) This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $48.16 to $48.27 per share. The reporting person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
(4) This option was granted on May 15, 2013 and vests over three years, with 8.33% of the shares underlying the option vested on August 15, 2013 and an additional 8.33% of the original number of shares underlying the option vesting at the end of each successive three-month period thereafter.
(5) Currently exercisable.

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