Tang Capital Management’s PTC Therapeutics PTCT Stock Holding History

Tang Capital Management’s Portfolio PTCT Stock Details PTCT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$102M	Hold	1,500,000	–	–	5.19%	8
2025 Q4	$114M	Hold	1,500,000	–	–	5.63%	3
2025 Q3	$92.1M	Buy	1,500,000 +400,000	+36%	+$20.8M	3.54%	4
2025 Q2	$53.7M	Buy	1,100,000 +100,000	+10%	+$4.75M	2.72%	8
2025 Q1	$51M	Buy	1,000,000 +300,000	+43%	+$15M	2.82%	9
2024 Q4	$31.6M	Hold	700,000	–	–	2.09%	11
2024 Q3	$26M	Hold	700,000	–	–	1.86%	12
2024 Q2	$21.4M	Hold	700,000	–	–	2.18%	11
2024 Q1	$20.4M	Sell	700,000 -200,000	-22%	-$5.6M	2.12%	11
2023 Q4	$24.8M	Buy	+900,000	New	+$20.6M	2.29%	12

Other funds holding PTCT

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

RTW Investments New York $10B AUM 135.35% 1-Year Est. Return

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Toronto Dominion Bank Toronto, Ontario, Ontario, Canada $69.7B AUM 40.86% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return

Tang Capital Management's PTCT Position: Q1 2026 in Review

Tang Capital Management held its PTC Therapeutics (PTCT) position steady in Q1 2026 at 1,500,000 shares worth $102M. The position accounts for 5.19% of the portfolio, ranked #8.

Tang Capital Management first reported a position in PTCT in Q4 2023 and has held it in 10 quarters since. The position peaked at $114M in Q4 2025. 349 funds tracked by Wall St. Rank hold PTCT as of Q1 2026.

Tang Capital Management held 1,500,000 shares of PTC Therapeutics worth $102M as of Q1 2026.
Tang Capital Management left its PTC Therapeutics share count unchanged in Q1 2026.
PTC Therapeutics made up 5.19% of Tang Capital Management's portfolio in Q1 2026, its #8 holding.
Tang Capital Management first reported a position in PTC Therapeutics in Q4 2023 and has held it in 10 quarters since.
Tang Capital Management's PTC Therapeutics position peaked at $114M in Q4 2025.
349 funds tracked by Wall St. Rank held PTC Therapeutics as of Q1 2026.

Based on Tang Capital Management's 13F filing for Q1 2026, filed 15 May 2026.