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Penumbra shares owned by Water Island Capital

Quarter-by-quarter ownership of Penumbra (PEN) shares owned by Water Island Capital from 13F filings

Historical chart of Water Island Capital investment in Penumbra

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All positions including Penumbra held by Water Island Capital consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Penumbra by Water Island Capital

Quarter filed Position value Share count Share price at filing
2026-03-31 $39M 120k 328.37

More positions owned by Water Island Capital

Electronic Arts Equity (EA)
Janus Henderson Group Equity (JHG)
Warner Bros Discovery Equity (WBD)
Hologic Equity
Txnm Energy Equity (TXNM)
Penumbra Equity (PEN)
Chart Inds Equity (GTLS)
Norfolk Southn Corp Equity (NSC)
Masimo Corp Equity (MASI)
Electronic Arts Equity Put Put Option
Webster Finl Corp Equity (WBS)
Warner Bros Discovery Equity Put Put Option
Tri Pointe Homes Equity (TPH)
National Storage Affiliates Equity (NSA)
Great Lakes Dredge & Dock Equity

View all positions for Water Island Capital

Top funds holding Penumbra

FMR
BlackRock
Vanguard Group
Vanguard Capital Management
Vanguard Portfolio Management
HBK Investments
State Street Corporation
Millennium Management
Rtw Investments
Baillie Gifford & Co
Geode Capital Management
Balyasny Asset Management
Goldman Sachs Group
Citigroup
UBS Group

View all funds holding Penumbra