PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q4 2025

Shares 96,860 Value ($000) $7,357 Avg Close $72.67 Range $60.80 - $87.50

Q1 2019

Shares 94,102 Value ($000) $3,542 Avg Close $33.58 Range $27.53 - $39.67

Q4 2018

Shares 95,695 Value ($000) $3,284 Avg Close $35.96 Range $28.91 - $48.99

Q3 2018

Shares 169,920 Value ($000) $7,986 Avg Close $41.38 Range $32.13 - $48.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	96,860	$7,357	$72.67	$60.80 - $87.50
Q1 2019	94,102	$3,542	$33.58	$27.53 - $39.67
Q4 2018	95,695	$3,284	$35.96	$28.91 - $48.99
Q3 2018	169,920	$7,986	$41.38	$32.13 - $48.85