PENUMBRA INC (PEN)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
421
Reporting holders
$11.0B
Reported value
86.9%
Of shares outstanding
2.5%
Held as options
-27
Holder change
Institutions report 34,242,173 shares against 39,389,422 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $1.4B | 4,297,555 | 0.02% | 8q | -0.8%-$10.4M |
| HBK INVESTMENTS L P | $580.5M | 1,838,508 | 5.67% | 2q | +12.5%+$64.5M |
| VANGUARD CAPITAL MANAGEMENT LLC | $539.9M | 1,709,877 | 0.01% | 2q | +0.9%+$4.9M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $526.4M | 1,667,276 | 0.02% | 2q | +0.8%+$4.0M |
| STATE STREET CORP | $392.6M | 1,243,258 | 0.01% | 31q | +4.8%+$18.1M |
| ExodusPoint Capital Management, LP | $344.3M | 1,090,430 | 2.22% | 3q | +134.4%+$197.4M |
| Balyasny Asset Management L.P. | $344.2M | 1,090,163 | 0.43% | 4q | +43.0%+$103.6M |
| JPMORGAN CHASE & CO | $338.6M | 1,071,454 | 0.02% | 31q | +166.1%+$211.3M |
| MILLENNIUM MANAGEMENT LLC | $299.2M | 700,611 | 0.11% | 31q | -36.2%-$169.8M |
| GOLDMAN SACHS GROUP INC | $270.5M | 847,104 | 0.02% | 31q | +17.6%+$40.4M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $263.6M | 834,903 | 0.12% | 5q | +108.6%+$137.3M |
| GEODE CAPITAL MANAGEMENT, LLC | $251.5M | 796,471 | 0.01% | 31q | HELD |
| NORGES BANK | $237.5M | 752,242 | 0.02% | 32q | +607.9%+$204.0M |
| UBS Group AG | $222.2M | 703,822 | 0.03% | 31q | +25.6%+$45.3M |
| MORGAN STANLEY | $186.9M | 591,824 | 0.01% | 35q | +47.5%+$60.1M |
| AQR Arbitrage LLC | $178.0M | 563,873 | 2.54% | 2q | +33.3%+$44.5M |
| WHITEBOX ADVISORS LLC | $160.0M | 506,881 | 2.09% | 2q | +13.9%+$19.5M |
| CITADEL ADVISORS LLC | $158.4M | 448,763 | 0.02% | 31q | +121.4%+$86.8M |
| Capital World Investors | $151.5M | 479,701 | 0.02% | 31q | +6.4%+$9.1M |
| NEUBERGER BERMAN GROUP LLC | $138.5M | 438,553 | 0.09% | 31q | +44.4%+$42.6M |
| CITIGROUP INC | $136.8M | 433,125 | 0.05% | 31q | -30.2%-$59.3M |
| TWO SIGMA INVESTMENTS, LP | $135.2M | 428,128 | 0.10% | 5q | +635.4%+$116.8M |
| TUDOR INVESTMENT CORP ET AL | $126.5M | 400,649 | 0.18% | 2q | -2.5%-$3.3M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $108.5M | 343,713 | 0.01% | 31q | +6.6%+$6.7M |
| Sixth Street Partners Management Company, L.P. | $108.5M | 343,713 | 0.01% | new | NEW |
| NORTHERN TRUST CORP | $105.2M | 333,064 | 0.01% | 31q | +3.8%+$3.9M |
| DIMENSIONAL FUND ADVISORS LP | $103.0M | 326,120 | 0.02% | 31q | HELD |
| ALLIANCEBERNSTEIN L.P. | $99.0M | 301,585 | 0.03% | 31q | +33.3%+$24.7M |
| Verition Fund Management LLC | $89.9M | 284,618 | 0.23% | 7q | +318.6%+$68.4M |
| BANK OF AMERICA CORP /DE/ | $84.0M | 266,017 | 0.01% | 31q | +2.4%+$2.0M |
| Invesco Ltd. | $83.4M | 263,980 | 0.01% | 31q | -51.0%-$86.6M |
| Magnetar Financial LLC | $80.8M | 255,841 | 0.74% | 2q | +1.8%+$1.4M |
| VANGUARD FIDUCIARY TRUST CO | $79.5M | 251,746 | 0.02% | 2q | +1.8%+$1.4M |
| Bank of New York Mellon Corp | $74.3M | 235,328 | 0.01% | 31q | -4.5%-$3.5M |
| Hudson Bay Capital Management LP | $73.7M | 203,138 | 0.20% | 2q | -41.8%-$52.9M |
| LMR Partners LLP | $72.5M | 213,893 | 0.27% | 2q | -27.7%-$27.7M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $72.3M | 29,149 | 0.01% | 31q | -36.0%-$40.6M |
| Champlain Investment Partners, LLC | $69.2M | 219,032 | 1.78% | 31q | -55.4%-$86.0M |
| TIG Advisors, LLC | $67.9M | 215,082 | 3.01% | 2q | +258.0%+$48.9M |
| FMR LLC | $66.6M | 211,002 | 0.00% | 31q | -57.5%-$90.0M |
| D. E. Shaw & Co., Inc. | $62.3M | 197,329 | 0.03% | 26q | -2.3%-$1.5M |
| ALPINE ASSOCIATES MANAGEMENT INC. | $59.7M | 188,986 | 3.73% | 2q | +43.2%+$18.0M |
| Melqart Asset Management (UK) Ltd | $58.6M | 185,734 | 5.58% | 2q | +127.0%+$32.8M |
| CAXTON ASSOCIATES LLP | $56.6M | 179,384 | 1.06% | 2q | -2.9%-$1.7M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $55.8M | 176,720 | 0.08% | 7q | +30.9%+$13.2M |
| Birnam Oak Advisors, LP | $54.1M | 171,277 | 8.78% | 2q | +78.4%+$23.8M |
| Westchester Capital Management, LLC | $49.7M | 157,472 | 2.43% | 2q | +105.5%+$25.5M |
| WATER ISLAND CAPITAL LLC | $47.5M | 150,456 | 4.42% | 2q | +25.3%+$9.6M |
| Woodline Partners LP | $46.1M | 145,844 | 0.14% | 3q | -39.6%-$30.2M |
| Decagon Asset Management LLP | $44.8M | 142,001 | 8.54% | 2q | -15.3%-$8.1M |
| Squarepoint Ops LLC | $43.7M | 138,413 | 0.05% | 2q | -6.4%-$3.0M |
| Slotnik Capital, LLC | $42.0M | 133,000 | 10.85% | 2q | +31.7%+$10.1M |
| WESTFIELD CAPITAL MANAGEMENT CO LP | $41.5M | 131,394 | 0.14% | new | NEW |
| Jupiter Topco LLC | $41.1M | 130,275 | 0.02% | new | FIRST |
| Holocene Advisors, LP | $40.4M | 128,012 | 0.09% | 4q | +15.7%+$5.5M |
| NATIXIS | $39.3M | 124,458 | 0.16% | 2q | +7.1%+$2.6M |
| Rock Springs Capital Management LP | $36.5M | 115,750 | 1.78% | 31q | -3.9%-$1.5M |
| Nuveen, LLC | $35.8M | 113,430 | 0.01% | 6q | +12.6%+$4.0M |
| Amundi | $34.7M | 109,888 | 0.01% | 21q | -68.2%-$74.5M |
| RHUMBLINE ADVISERS | $34.5M | 109,180 | 0.03% | 31q | -0.9%-$313.5K |
| Kryger Capital LLC | $33.9M | 107,207 | 1.93% | 2q | -30.3%-$14.7M |
| HSBC HOLDINGS PLC | $32.0M | 101,245 | 0.01% | 18q | -8.1%-$2.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $30.8M | 97,689 | 0.01% | 31q | +1.0%+$307.5K |
| Calamos Advisors LLC | $29.0M | 91,863 | 0.10% | 7q | +37.4%+$7.9M |
| MARSHALL WACE, LLP | $28.6M | 90,520 | 0.02% | 13q | +149.5%+$17.1M |
| PRINCIPAL FINANCIAL GROUP INC | $28.1M | 88,873 | 0.01% | 28q | +0.8%+$219.4K |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC | $27.3M | 86,330 | 0.12% | 2q | -38.1%-$16.8M |
| Empyrean Capital Partners, LP | $26.8M | 85,000 | 0.89% | 2q | HELD |
| Capula Management Ltd | $26.2M | 83,000 | 0.09% | 2q | -18.5%-$5.9M |
| BNP PARIBAS FINANCIAL MARKETS | $26.2M | 82,985 | 0.01% | 31q | -4.0%-$1.1M |
| Man Group plc | $25.3M | 80,224 | 0.04% | 13q | +7.4%+$1.8M |
| JANE STREET GROUP, LLC | $25.3M | 24,794 | 0.00% | 27q | +1080.1%+$23.1M |
| RENAISSANCE TECHNOLOGIES LLC | $25.1M | 79,500 | 0.03% | 2q | +3580.6%+$24.4M |
| CSS LLC/IL | $23.9M | 38,740 | 0.93% | 2q | +7.2%+$1.6M |
| Walleye Trading LLC | $23.9M | options only | 0.03% | 20q | OPTIONS |
| PICTON MAHONEY ASSET MANAGEMENT | $23.7M | 75,200 | 0.18% | 2q | -6.0%-$1.5M |
| Swiss National Bank | $23.7M | 74,980 | 0.01% | 31q | +1.9%+$442.1K |
| CARRET ASSET MANAGEMENT, LLC | $22.7M | 72,000 | 1.99% | 31q | HELD |
| Susquehanna Portfolio Strategies, LLC | $21.1M | 66,945 | 0.34% | 4q | -4.9%-$1.1M |
| Quarry LP | $20.6M | 65,227 | 1.71% | 2q | +65.8%+$8.2M |
| Legal & General Group Plc | $20.5M | 64,912 | 0.00% | 31q | +6.1%+$1.2M |
| California Public Employees Retirement System | $20.3M | 64,327 | 0.01% | 31q | +6.5%+$1.2M |
| PFM Health Sciences, LP | $19.0M | 60,221 | 1.63% | 31q | -56.9%-$25.1M |
| SIMPLEX TRADING, LLC | $18.2M | 1,843 | 0.01% | 4q | -89.6%-$156.8M |
| HARVEST MANAGEMENT LLC | $18.2M | 57,487 | 7.13% | 2q | +219.4%+$12.5M |
| Sculptor Capital LP | $18.0M | 57,000 | 0.15% | 2q | HELD |
| GABELLI & Co INVESTMENT ADVISERS, INC. | $16.8M | 53,292 | 2.45% | 2q | +3.1%+$505.2K |
| GABELLI FUNDS LLC | $16.6M | 52,423 | 0.11% | 2q | -7.4%-$1.3M |
| CREDIT INDUSTRIEL ET COMMERCIAL | $16.4M | 52,078 | 1.06% | 2q | +101.7%+$8.3M |
| FIRST TRUST ADVISORS LP | $15.5M | 49,183 | 0.01% | 7q | -34.6%-$8.2M |
| BARCLAYS PLC | $14.8M | 46,953 | 0.00% | 31q | +178.1%+$9.5M |
| EQUITEC PROPRIETARY MARKETS, LLC | $14.7M | options only | 2.62% | 2q | OPTIONS |
| Retirement Systems of Alabama | $12.8M | 40,680 | 0.04% | 28q | -15.4%-$2.3M |
| STATE OF WISCONSIN INVESTMENT BOARD | $12.0M | 37,931 | 0.02% | 31q | -5.9%-$747.4K |
| PRELUDE CAPITAL MANAGEMENT, LLC | $11.5M | 36,381 | 0.84% | 7q | -24.1%-$3.7M |
| BOUSSARD & GAVAUDAN GESTION SAS | $11.5M | 36,340 | 0.58% | new | FIRST |
| Yakira Capital Management, Inc. | $11.4M | options only | 3.26% | new | OPTIONS |
| VANGUARD ASSET MANAGEMENT, Ltd | $11.4M | 36,049 | 0.01% | 2q | +7.3%+$773.9K |
| AMERIPRISE FINANCIAL INC | $10.9M | 34,403 | 0.00% | 31q | -50.4%-$11.1M |
| Alberta Investment Management Corp | $10.5M | 33,120 | 0.06% | 2q | -58.6%-$14.8M |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-13 | 13G | Barclays PLC | 6.0% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 421 | $11.0B | 34,242,173 | 37 | 138 | 166 | 2.5% |
| Q1 2026 | 448 | $11.1B | 33,140,100 | 118 | 130 | 128 | 1.7% |
| Q4 2025 | 402 | $10.7B | 34,180,448 | 60 | 112 | 159 | 0.6% |
| Q3 2025 | 388 | $8.8B | 34,399,169 | 47 | 117 | 155 | 1.2% |
| Q2 2025 | 410 | $8.7B | 33,498,183 | 74 | 146 | 118 | 1.0% |
| Q1 2025 | 387 | $8.7B | 32,200,839 | 81 | 128 | 113 | 1.3% |
| Q4 2024 | 336 | $7.7B | 32,005,473 | 49 | 102 | 116 | 0.9% |
| Q3 2024 | 297 | $6.4B | 32,194,316 | 45 | 78 | 122 | 1.9% |
| Q2 2024 | 304 | $5.9B | 32,106,251 | 52 | 117 | 90 | 2.6% |
| Q1 2024 | 301 | $7.2B | 31,048,722 | 40 | 112 | 90 | 3.8% |
| Q4 2023 | 297 | $8.3B | 31,418,535 | 38 | 100 | 99 | 4.4% |
| Q3 2023 | 277 | $7.7B | 30,732,077 | 30 | 84 | 104 | 4.1% |
| Q2 2023 | 312 | $11.0B | 31,300,593 | 72 | 73 | 106 | 1.9% |
| Q1 2023 | 259 | $10.5B | 37,224,124 | 43 | 70 | 91 | 1.4% |
| Q4 2022 | 237 | $7.2B | 31,499,449 | 47 | 76 | 64 | 3.2% |
| Q3 2022 | 265 | $6.3B | 32,502,130 | 50 | 92 | 73 | 2.7% |
| Q2 2022 | 257 | $4.0B | 31,536,626 | 38 | 102 | 68 | 1.9% |
| Q1 2022 | 279 | $6.8B | 30,308,372 | 39 | 90 | 84 | 1.1% |
| Q4 2021 | 283 | $8.8B | 30,391,624 | 33 | 99 | 76 | 0.7% |
| Q3 2021 | 281 | $8.0B | 29,792,957 | 25 | 92 | 92 | 1.2% |
| Q2 2021 | 291 | $8.3B | 29,899,464 | 45 | 88 | 88 | 1.8% |
| Q1 2021 | 277 | $8.6B | 31,060,162 | 54 | 62 | 114 | 1.8% |
| Q4 2020 | 271 | $6.3B | 34,400,576 | 33 | 97 | 87 | 4.4% |
| Q3 2020 | 281 | $6.4B | 32,371,580 | 51 | 87 | 87 | 1.9% |
| Q2 2020 | 257 | $5.6B | 30,840,725 | 39 | 95 | 84 | 0.9% |
| Q1 2020 | 251 | $4.9B | 29,907,376 | 31 | 87 | 86 | 1.0% |
| Q4 2019 | 255 | $5.1B | 30,497,816 | 44 | 83 | 74 | 1.2% |
| Q3 2019 | 224 | $4.6B | 33,718,304 | 51 | 84 | 52 | 1.6% |
| Q2 2019 | 213 | $4.9B | 30,279,532 | 48 | 72 | 53 | 1.5% |
| Q1 2019 | 204 | $4.6B | 30,688,187 | 37 | 68 | 68 | 1.2% |
| Q4 2018 | 189 | $3.5B | 28,603,571 | 5 | 3 | 3 | 0.7% |