PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

Palo Alto Investors LP's Holding History (CIK: 0001306923)

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

Q4 2025

Shares 903,916 Value ($000) $68,661 Avg Close $72.67 Range $60.80 - $87.50

Q3 2025

Shares 862,613 Value ($000) $52,939 Avg Close $52.09 Range $43.17 - $63.19

Q2 2025

Shares 406,469 Value ($000) $19,852 Avg Close $47.47 Range $35.95 - $52.98

Q1 2025

Shares 404,196 Value ($000) $20,598 Avg Close $49.90 Range $41.66 - $58.38

Q4 2024

Shares 386,413 Value ($000) $17,443 Avg Close $42.80 Range $34.57 - $54.16

Q3 2024

Shares 264,469 Value ($000) $9,812 Avg Close $33.48 Range $29.02 - $38.62

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	903,916	$68,661	$72.67	$60.80 - $87.50
Q3 2025	862,613	$52,939	$52.09	$43.17 - $63.19
Q2 2025	406,469	$19,852	$47.47	$35.95 - $52.98
Q1 2025	404,196	$20,598	$49.90	$41.66 - $58.38
Q4 2024	386,413	$17,443	$42.80	$34.57 - $54.16
Q3 2024	264,469	$9,812	$33.48	$29.02 - $38.62