PEN Penumbra, Inc.
Penumbra, Inc. (PEN) Institutional Ownership
What the institutions did with PEN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 4.3M | 12.6% |
| HBK INVESTMENTS L P | 1.8M | 5.4% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | 5.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.7M | 4.9% |
| STATE STREET CORP | 1.2M | 3.6% |
| ExodusPoint Capital Management, LP | 1.1M | 3.2% |
| Balyasny Asset Management L.P. | 1.1M | 3.2% |
| JPMORGAN CHASE & CO | 1.1M | 3.1% |
| GOLDMAN SACHS GROUP INC | 847.1K | 2.5% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 834.9K | 2.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 796.5K | 2.3% |
| NORGES BANK | 752.2K | 2.2% |
| UBS Group AG | 703.8K | 2.1% |
| MILLENNIUM MANAGEMENT LLC | 700.6K | 2.1% |
| MORGAN STANLEY | 591.8K | 1.7% |
| AQR Arbitrage LLC | 563.9K | 1.7% |
| WHITEBOX ADVISORS LLC | 506.9K | 1.5% |
| Capital World Investors | 479.7K | 1.4% |
| CITADEL ADVISORS LLC | 448.8K | 1.3% |
| NEUBERGER BERMAN GROUP LLC | 438.6K | 1.3% |
| CITIGROUP INC | 433.1K | 1.3% |
| TWO SIGMA INVESTMENTS, LP | 428.1K | 1.3% |
| TUDOR INVESTMENT CORP ET AL | 400.6K | 1.2% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 343.7K | 1.0% |
| NORTHERN TRUST CORP | 333.1K | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BAILLIE GIFFORD & CO | Sold Out | 840.4K | 0 | -840.4K |
| JPMORGAN CHASE & CO | Increased | 402.6K | 1.1M | +668.8K |
| ExodusPoint Capital Management, LP | Increased | 465.2K | 1.1M | +625.2K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 400.2K | 834.9K | +434.7K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 1.1M | 700.6K | -397.5K |
| TWO SIGMA INVESTMENTS, LP | Increased | 58.2K | 428.1K | +369.9K |
| Balyasny Asset Management L.P. | Increased | 762.1K | 1.1M | +328.1K |
| CONGRESS ASSET MANAGEMENT CO | Reduced | 317.3K | 12.2K | -305.1K |
| FMR LLC | Reduced | 496.1K | 211.0K | -285.1K |
| Invesco Ltd. | Reduced | 538.2K | 264.0K | -274.2K |
| Champlain Investment Partners, LLC | Reduced | 491.4K | 219.0K | -272.4K |
| CITADEL ADVISORS LLC | Increased | 202.7K | 448.8K | +246.0K |
| Amundi | Reduced | 345.8K | 109.9K | -235.9K |
| BANK OF NOVA SCOTIA | Reduced | 211.8K | 1.2K | -210.7K |
| HBK INVESTMENTS L P | Increased | 1.6M | 1.8M | +204.2K |
| SOROS FUND MANAGEMENT LLC | Sold Out | 203.4K | 0 | -203.4K |
| MORGAN STANLEY | Increased | 401.4K | 591.8K | +190.5K |
| CITIGROUP INC | Reduced | 620.9K | 433.1K | -187.8K |
| Thrivent Financial for Lutherans | Reduced | 188.1K | 8.7K | -179.4K |
| TIG Advisors, LLC | Increased | 60.1K | 215.1K | +155.0K |
| Hudson Bay Capital Management LP | Reduced | 349.0K | 203.1K | -145.9K |
| UBS Group AG | Increased | 560.3K | 703.8K | +143.5K |
| AQR Arbitrage LLC | Increased | 423.1K | 563.9K | +140.8K |
| NEUBERGER BERMAN GROUP LLC | Increased | 303.6K | 438.6K | +134.9K |
| WESTFIELD CAPITAL MANAGEMENT CO LP | New | 0 | 131.4K | +131.4K |
| GOLDMAN SACHS GROUP INC | Increased | 720.6K | 847.1K | +126.5K |
| BRAIDWELL LP | Sold Out | 105.4K | 0 | -105.4K |
| Melqart Asset Management (UK) Ltd | Increased | 81.8K | 185.7K | +103.9K |
| Clearbridge Investments, LLC | Sold Out | 97.1K | 0 | -97.1K |
| Woodline Partners LP | Reduced | 241.6K | 145.8K | -95.8K |
| Sand Grove Capital Management LLP | Sold Out | 86.8K | 0 | -86.8K |
| LMR Partners LLP | Reduced | 295.7K | 213.9K | -81.8K |
| Westchester Capital Management, LLC | Increased | 76.6K | 157.5K | +80.8K |
| Allspring Global Investments Holdings, LLC | Sold Out | 79.9K | 0 | -79.9K |
| PFM Health Sciences, LP | Reduced | 139.8K | 60.2K | -79.6K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 2.2K | 79.5K | +77.3K |
| Birnam Oak Advisors, LP | Increased | 96.0K | 171.3K | +75.3K |
| ALLIANCEBERNSTEIN L.P. | Increased | 226.3K | 301.6K | +75.3K |
| Verition Fund Management LLC | Increased | 68.0K | 142.3K | +74.3K |
| NZS Capital, LLC | Sold Out | 69.0K | 0 | -69.0K |
| GLAZER CAPITAL, LLC | Increased | 94.8K | 158.1K | +63.3K |
| WHITEBOX ADVISORS LLC | Increased | 445.0K | 506.9K | +61.9K |
| SG Americas Securities, LLC | Reduced | 102.0K | 41.0K | -61.0K |
| STATE STREET CORP | Increased | 1.2M | 1.2M | +57.4K |
| ALPINE ASSOCIATES MANAGEMENT INC. | Increased | 132.0K | 189.0K | +57.0K |
| AMERICAN CENTURY COMPANIES INC | Reduced | 70.0K | 13.5K | -56.5K |
| MARSHALL WACE, LLP | Increased | 36.3K | 90.5K | +54.2K |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC | Reduced | 139.4K | 86.3K | -53.1K |
| Nearwater Capital Markets, Ltd | Sold Out | 50.0K | 0 | -50.0K |
| Alberta Investment Management Corp | Reduced | 80.0K | 33.1K | -46.9K |
| Kryger Capital LLC | Reduced | 153.8K | 107.2K | -46.6K |
| AQR CAPITAL MANAGEMENT LLC | Reduced | 77.4K | 31.8K | -45.6K |
| PSquared Asset Management AG | Sold Out | 42.8K | 0 | -42.8K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduced | 46.3K | 3.8K | -42.5K |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 52.8K | 10.4K | -42.4K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Increased | 135.0K | 176.7K | +41.7K |
| Caisse de depot et placement du Quebec | Sold Out | 41.7K | 0 | -41.7K |
| HARVEST MANAGEMENT LLC | Increased | 18.0K | 57.5K | +39.5K |
| OSAIC HOLDINGS, INC. | Reduced | 45.2K | 7.4K | -37.8K |
| ROYAL BANK OF CANADA | Reduced | 39.8K | 3.9K | -35.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.