DaveManuel.com · Institutional Ownership · Who Owns It
PENUMBRA INC (PEN)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
456
Reporting holders
$11.1B
Reported value
86.7%
Of shares outstanding
0.6%
Calls
1.9%
Puts
-32
Holder change
Institutions report 34,136,173 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.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
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 | 5.64% | 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 incl. $78.0M options CALL+PUT | 700,611 | 0.11% | 31q | -36.2%-$169.8M |
| GOLDMAN SACHS GROUP INC | $270.5M incl. $3.1M options PUT | 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 incl. $16.7M options CALL+PUT | 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 |
| 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 |
| 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 incl. $9.6M options PUT | 203,138 | 0.20% | 2q | -41.8%-$52.9M |
| LMR Partners LLP | $72.5M incl. $5.0M options PUT | 213,893 | 0.27% | 2q | -27.7%-$27.7M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $72.3M incl. $63.1M options CALL+PUT | 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 |
| GLAZER CAPITAL, LLC | $53.5M incl. $3.5M options PUT | 158,127 | 1.31% | 2q | +66.8%+$21.4M |
| 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 |
| Verition Fund Management LLC | $44.9M | 142,309 | 0.23% | 7q | +109.3%+$23.5M |
| 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 incl. $17.4M options CALL+PUT | 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 incl. $11.7M options CALL+PUT | 38,740 | 0.93% | 2q | +7.2%+$1.6M |
| Walleye Trading LLC | $23.9M CALL+PUT | 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 |
| C WorldWide Group Holding A/S | $22.7M | 72,000 | 0.55% | 10q | 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 incl. $17.6M options CALL+PUT | 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 CALL+PUT | options only | 2.62% | 2q | OPTIONS |
| PRICE T ROWE ASSOCIATES INC /MD/ | $14.1M | 44,624 | 0.00% | 31q | +6.5%+$853.8K |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $13.7M | 43,286 | 0.01% | 31q | +0.7%+$94.4K |
| SG Americas Securities, LLC | $13.0M | 41,029 | 0.01% | 9q | -59.8%-$19.3M |
| 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 |
Showing the largest 100 of 456 reported holders.
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 |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 89 | $93.2M | 292,700 | 13 | 20 | 29 | 0.0% |
| Q2 2026 | 456 | $11.1B | 34,136,173 | 37 | 144 | 181 | 2.5% |
| Q1 2026 | 488 | $11.3B | 33,849,057 | 123 | 142 | 138 | 1.7% |
| Q4 2025 | 444 | $11.5B | 36,807,255 | 66 | 120 | 173 | 0.6% |
| Q3 2025 | 428 | $9.5B | 37,129,652 | 52 | 127 | 169 | 1.1% |
| Q2 2025 | 453 | $9.3B | 35,860,747 | 80 | 157 | 134 | 0.9% |
| Q1 2025 | 429 | $9.5B | 35,206,914 | 88 | 139 | 126 | 1.2% |
| Q4 2024 | 376 | $8.4B | 34,930,046 | 52 | 119 | 126 | 0.9% |
| Q3 2024 | 338 | $7.0B | 35,592,610 | 48 | 92 | 136 | 1.8% |
| Q2 2024 | 348 | $6.6B | 35,979,104 | 59 | 129 | 101 | 2.4% |
| Q1 2024 | 346 | $8.0B | 34,600,085 | 45 | 126 | 105 | 3.5% |
| Q4 2023 | 346 | $9.2B | 34,982,692 | 49 | 111 | 119 | 4.1% |
| Q3 2023 | 321 | $8.3B | 33,132,147 | 34 | 98 | 118 | 3.9% |
| Q2 2023 | 368 | $12.1B | 34,425,971 | 83 | 91 | 124 | 1.8% |
| Q1 2023 | 315 | $11.5B | 40,747,206 | 56 | 88 | 103 | 1.4% |
| Q4 2022 | 295 | $7.9B | 34,504,896 | 51 | 97 | 87 | 3.1% |
| Q3 2022 | 257 | $20.4B | 106,555,164 | 50 | 86 | 71 | 0.8% |
| Q2 2022 | 250 | $20.7B | 165,466,940 | 37 | 97 | 67 | 0.4% |
| Q1 2022 | 273 | $7.0B | 31,396,572 | 39 | 86 | 82 | 1.1% |
| Q4 2021 | 280 | $30.8B | 107,138,972 | 33 | 96 | 76 | 0.2% |
| Q3 2021 | 278 | $10.6B | 39,293,965 | 25 | 92 | 89 | 0.9% |
| Q2 2021 | 288 | $10.8B | 38,988,609 | 45 | 87 | 86 | 1.4% |
| Q1 2021 | 273 | $11.0B | 40,205,126 | 54 | 60 | 112 | 1.4% |
| Q4 2020 | 267 | $23.4B | 132,011,065 | 33 | 95 | 85 | 1.2% |
| Q3 2020 | 278 | $14.7B | 75,134,550 | 51 | 87 | 84 | 0.8% |
| Q2 2020 | 254 | $13.2B | 73,623,005 | 39 | 93 | 83 | 0.4% |
| Q1 2020 | 249 | $15.3B | 94,655,957 | 31 | 86 | 85 | 0.3% |
| Q4 2019 | 251 | $14.8B | 89,908,700 | 44 | 83 | 71 | 0.4% |
| Q3 2019 | 221 | $12.4B | 91,771,173 | 50 | 82 | 53 | 0.6% |
| Q2 2019 | 210 | $12.3B | 76,235,915 | 48 | 70 | 52 | 0.6% |
| Q1 2019 | 201 | $7.8B | 52,613,584 | 37 | 67 | 67 | 0.7% |
| Q4 2018 | 186 | $5.9B | 48,468,413 | 5 | 2 | 4 | 0.4% |