PTC THERAPEUTICS, INC. — Director's Dealing 2015

May 23, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PTC THERAPEUTICS, INC. (PTCT)
CIK: 0001070081
Period of Report: 2015-05-22

Reporting Person: Kovacs Shane William Charles (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-22	Common Stock	M	60375	$10.85	Acquired	72725	Direct
2015-05-22	Common Stock	M	18616	$27.05	Acquired	91341	Direct
2015-05-22	Common Stock	S	64041	$55.26	Disposed	27300	Direct
2015-05-22	Common Stock	S	18450	$55.93	Disposed	8850	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-22	Stock Option (Right to Buy)	$10.85	M	60375	Disposed	2023-05-21	Common Stock (60375)	Direct
2015-05-22	Stock Option (Right to Buy)	$27.05	M	18616	Disposed	2024-01-27	Common Stock (18616)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Buy)	$51.00	2025-01-01	Common Stock (85600)	85600	Direct

Footnotes

F1: 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 purposes of covering tax obligations associated with a restricted stock vesting event and diversification.

F2: This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $54.73 to $55.72 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.

F3: This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $55.73 to $56.48 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.

F4: This option award was granted on May 22, 2013, with 25% of the shares underlying the option vested on May 22, 2014, and an additional 2.083% of the original number of shares underlying the option vesting on a monthly basis thereafter, beginning on June 30, 2014.

F5: This option award was granted on January 28, 2014, with 25% of the shares underlying the option vested on January 1, 2015, and an additional 6.25% of the original number of shares underlying the option vesting at the end of each successive three-month period thereafter, beginning on April 1, 2015.

F6: This option award was granted on January 2, 2015, with 25% of the shares underlying the option vesting on January 1, 2016, and an additional 6.25% of the original number of shares underlying the option vesting at the end of each successive three-month period thereafter, beginning on April 1, 2016.