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 Q2	$122M	Hold	1,500,000	–	–	5.56%	7
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 $6.73T AUM 46.02% 1-Year Est. Return

RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return

Jupiter Topco New York $245B AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Toronto Dominion Bank Toronto, Ontario, Ontario, Canada $86.4B AUM 59.51% 1-Year Est. Return

Westfield Capital Management Boston, Massachusetts $30.6B AUM 61.81% 1-Year Est. Return

Tang Capital Management's PTCT Position: Q2 2026 in Review

Tang Capital Management held its PTC Therapeutics (PTCT) position steady in Q2 2026 at 1,500,000 shares worth $122M. The position accounts for 5.56% of the portfolio, ranked #7.

Tang Capital Management first reported a position in PTCT in Q4 2023 and has held it in 11 quarters since. 382 funds tracked by Wall St. Rank hold PTCT as of Q2 2026.

Tang Capital Management held 1,500,000 shares of PTC Therapeutics worth $122M as of Q2 2026.
Tang Capital Management left its PTC Therapeutics share count unchanged in Q2 2026.
PTC Therapeutics made up 5.56% of Tang Capital Management's portfolio in Q2 2026, its #7 holding.
Tang Capital Management first reported a position in PTC Therapeutics in Q4 2023 and has held it in 11 quarters since.
382 funds tracked by Wall St. Rank held PTC Therapeutics as of Q2 2026.

Based on Tang Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.