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Who owns PTC Therapeutics (PTCT) stock

352 funds reported PTC Therapeutics (PTCT) shares in their latest 13F filings, worth $9.2B in all. The largest holder is BlackRock ($1.1B). Last quarter 188 funds added to their stakes and 145 cut them.

Largest holders of PTCT (13F)Largest holders of PTCT (13F)BlackRock$1.1BVanguard Group$669MRTW Investments, LP$632MJupiter Topco LLC$590MJanus Henderson Group$490MVanguard Portfolio Management LLC$402MState Street$375MWellington Management Group LLP$337MVanguard Capital Management LLC$305MGeode Capital Management, LLC$180M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock13,964,554$1.1Bincrease2026-06-30
Vanguard Group8,803,203$669Mincrease2025-12-31
RTW Investments, LP7,746,415$632Munchanged2026-06-30
Jupiter Topco LLC7,236,402$590Mbase2026-06-30
Janus Henderson Group7,193,433$490Mincrease2026-03-31
Vanguard Portfolio Management LLC4,928,111$402Mincrease2026-06-30
State Street4,598,952$375Mincrease2026-06-30
Wellington Management Group LLP4,128,273$337Mincrease2026-06-30
Vanguard Capital Management LLC3,739,127$305Mincrease2026-06-30
Geode Capital Management, LLC2,207,376$180Mdecrease2026-06-30
Toronto Dominion Bank2,165,846$177Mdecrease2026-06-30
Westfield Capital Management Co LP1,956,156$160Mnew2026-06-30
Hood River Capital Management LLC1,738,613$142Mincrease2026-06-30
William Blair Investment Management, LLC1,722,688$141Mnew2026-06-30
D. E. Shaw1,548,919$126Mdecrease2026-06-30

PTC Therapeutics' latest quarter

PTC Therapeutics, Q3 2026: revenue $358M (+70% year over year), operating margin 7.0%, net loss $51.7M, operating cash flow −$25.3M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most PTCT stock?

By the latest 13F filings: BlackRock ($1.1B); Vanguard Group ($669M); RTW Investments, LP ($632M); Jupiter Topco LLC ($590M); Janus Henderson Group ($490M).

What is the short interest in PTCT?

8,303,282 shares were sold short at the 2026-10-15 settlement, -9.44% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.