PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q4 2025

Shares 1,136,188 Value ($000) $86,305 Avg Close $72.67 Range $60.80 - $87.50

Q3 2025

Shares 1,131,749 Value ($000) $69,455 Avg Close $52.09 Range $43.17 - $63.19

Q2 2025

Shares 1,059,026 Value ($000) $51,723 Avg Close $47.47 Range $35.95 - $52.98

Q1 2025

Shares 1,512,645 Value ($000) $77,084 Avg Close $49.90 Range $41.66 - $58.38

Q4 2024

Shares 1,041,059 Value ($000) $46,993 Avg Close $42.80 Range $34.57 - $54.16

Q1 2015

Shares 12,329 Value ($000) $750 Avg Close $61.01 Range $46.91 - $77.87

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,136,188	$86,305	$72.67	$60.80 - $87.50
Q3 2025	1,131,749	$69,455	$52.09	$43.17 - $63.19
Q2 2025	1,059,026	$51,723	$47.47	$35.95 - $52.98
Q1 2025	1,512,645	$77,084	$49.90	$41.66 - $58.38
Q4 2024	1,041,059	$46,993	$42.80	$34.57 - $54.16
Q1 2015	12,329	$750	$61.01	$46.91 - $77.87