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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1070081	Ptc Therapeutics Inc.	PTCT	Pharmaceutical Preparations (2834)	043416587

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1288952	Michael Schmertzler	1300 Valley Road New Canaan CT 06840		Yes	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2014-02-19	23,000	$24.50	1,320,369	No	4	P	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	26,766	Direct
Common Stock	2,256,882	Indirect	See footnote

Footnotes

Consists of (i) 1,759,609 shares held by Credit Suisse First Boston Equity Partners, L.P.; (ii) 491,855 shares held by Credit Suisse First Boston Equity Partners (Bermuda), L.P.; (iii) 3,487 shares held by EMA Private Equity Fund 1999 LP; (iv) 1,697 shares held by Credit Suisse First Boston U S Executive Advisors LP; and (v) 234 shares held by Credit Suisse First Boston Finders and Screeners LP. Mr. Schmertzler is a Managing Director of Aries Advisors, LLC, the sub-advisor to Credit Suisse First Boston Equity Partners, L.P. Mr. Schmertzler disclaims beneficial ownership of the shares held by Credit Suisse First Boston Equity Partners, L.P. and its affiliates except to the extent of any pecuniary interest therein.
Securities held by Section Six Partners, L.P. This Form 4 reports 23,000 shares purchased by Section Six Partners, L.P. in the Issuer's registered public offering on February 19, 2014. Mr. Schmertzler is a general and limited partner of, and trustee of certain family trusts holding interests in, Section Six Partners, L.P. Mr. Schmertzler disclaims beneficial ownership of the shares held by Section Six Partners, L.P. except to the extent of any pecuniary interest therein.