PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

Note: Option positions (PUT/CALL) are excluded.

Q3 2019

Shares 471,000 Value ($000) $15,929 Avg Close $43.52 Range $33.05 - $48.81

Q2 2019

Shares 471,000 Value ($000) $21,195 Avg Close $39.49 Range $34.51 - $45.00

Q1 2019

Shares 237,000 Value ($000) $8,921 Avg Close $33.58 Range $27.53 - $39.67

Q1 2014

Shares 317,530 Value ($000) $8,300 Avg Close $26.87 Range $16.21 - $34.65

Q4 2013

Shares 545,027 Value ($000) $9,249 Avg Close $17.58 Range $13.15 - $22.42

Q3 2013

Shares 845,027 Value ($000) $18,134 Avg Close $17.38 Range $13.88 - $24.38

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2019	471,000	$15,929	$43.52	$33.05 - $48.81
Q2 2019	471,000	$21,195	$39.49	$34.51 - $45.00
Q1 2019	237,000	$8,921	$33.58	$27.53 - $39.67
Q1 2014	317,530	$8,300	$26.87	$16.21 - $34.65
Q4 2013	545,027	$9,249	$17.58	$13.15 - $22.42
Q3 2013	845,027	$18,134	$17.38	$13.88 - $24.38