PEN Institutional Ownership & Shareholders
PENUMBRA INC (PEN) is currently held by 438 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $10.45B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PEN tracked by InsiderSet, reporting ownership valued at approximately $1.36B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.37B, representing an estimated gain of +1.01% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% of the total disclosed PEN value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Hbk Investments L P, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in PENUMBRA INC (PEN).
This page ranks the largest institutional PEN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
438
Total Reported Value
$10.45B
Largest Holder
Blackrock, Inc.
Largest Position
$1.36B
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
46
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 4,297,555 | $1,356,952,992 | $1,370,705,167 | +$13,752,175 | +1.01% | |
| Hbk Investments L P | 6.75% | 1,838,508 | $580,508,901 | $586,392,127 | +$5,883,226 | +1.01% | |
| Vanguard Capital Management Llc | 0.01% | 1,709,877 | $539,893,663 | $545,365,269 | +$5,471,606 | +1.01% | |
| Vanguard Portfolio Management Llc | 0.02% | 1,667,276 | $526,442,397 | $531,777,680 | +$5,335,283 | +1.01% | |
| State Street Corp | 0.01% | 1,243,258 | $392,556,505 | $396,537,139 | +$3,980,634 | +1.01% | |
| Exoduspoint Capital Management, Lp | 3.19% | 1,090,430 | $344,303,272 | $347,792,649 | +$3,489,377 | +1.01% | |
| Balyasny Asset Management L.P. | 0.63% | 1,090,163 | $344,218,967 | $347,707,489 | +$3,488,522 | +1.01% | |
| Jpmorgan Chase & Co | 0.02% | 1,071,454 | $338,557,982 | $341,740,253 | +$3,182,271 | +0.94% | |
| Goldman Sachs Group Inc | 0.03% | 847,104 | $267,473,088 | $270,183,821 | +$2,710,733 | +1.01% | |
| Arrowstreet Capital, Limited Partnership | 0.12% | 834,903 | $263,620,622 | $266,292,312 | +$2,671,690 | +1.01% | |
| Geode Capital Management, Llc | 0.01% | 796,471 | $251,546,090 | $254,034,425 | +$2,488,335 | +0.99% | |
| Norges Bank | 0.02% | 752,242 | $237,520,412 | $239,927,586 | +$2,407,174 | +1.01% | |
| Ubs Group Ag | 0.04% | 703,822 | $222,231,798 | $224,484,027 | +$2,252,229 | +1.01% | |
| Millennium Management Llc | 0.15% | 700,611 | $221,217,923 | $223,459,878 | +$2,241,955 | +1.01% | |
| Morgan Stanley | 0.01% | 591,824 | $186,869,151 | $188,762,265 | +$1,893,114 | +1.01% | |
| Aqr Arbitrage Llc | 2.54% | 563,873 | $178,042,900 | $179,847,293 | +$1,804,393 | +1.01% | |
| Capital World Investors | 0.02% | 479,701 | $151,465,591 | $153,000,634 | +$1,535,043 | +1.01% | |
| Citadel Advisors Llc | 0.08% | 448,763 | $141,696,917 | $143,132,959 | +$1,436,042 | +1.01% | |
| Citigroup Inc | 0.06% | 433,125 | $136,759,219 | $138,145,219 | +$1,386,000 | +1.01% | |
| Two Sigma Investments, Lp | 0.10% | 428,128 | $135,181,416 | $136,551,426 | +$1,370,010 | +1.01% | |
| Tudor Investment Corp Et Al | 0.52% | 400,649 | $126,504,922 | $127,786,999 | +$1,282,077 | +1.01% | |
| Charles Schwab Investment Management Inc | 0.01% | 343,713 | $108,527,380 | $109,627,261 | +$1,099,881 | +1.01% | |
| Northern Trust Corp | 0.01% | 333,064 | $105,164,958 | $106,230,763 | +$1,065,805 | +1.01% | |
| Dimensional Fund Advisors Lp | 0.02% | 326,120 | $102,972,179 | $104,015,974 | +$1,043,795 | +1.01% | |
| Alliancebernstein L.P. | 0.03% | 301,585 | $99,031,466 | $96,190,536 | -$2,840,930 | -2.87% | |
| Bank Of America Corp | 0.01% | 266,017 | $83,994,867 | $84,846,122 | +$851,255 | +1.01% | |
| Invesco Ltd. | 0.01% | 263,980 | $83,351,684 | $84,196,421 | +$844,737 | +1.01% | |
| Magnetar Financial Llc | 0.74% | 255,841 | $80,781,796 | $81,600,487 | +$818,691 | +1.01% | |
| Vanguard Fiduciary Trust Co | 0.02% | 251,746 | $79,488,800 | $80,294,387 | +$805,587 | +1.01% | |
| Bank Of New York Mellon Corp | 0.01% | 235,328 | $74,304,811 | $75,057,866 | +$753,055 | +1.01% | |
| Champlain Investment Partners, Llc | 1.78% | 219,032 | $69,159,354 | $69,860,256 | +$700,902 | +1.01% | |
| Tig Advisors, Llc | 3.12% | 215,082 | $67,912,141 | $68,600,404 | +$688,263 | +1.01% | |
| Lmr Partners Llp | 0.50% | 213,893 | $67,536,715 | $68,221,172 | +$684,457 | +1.01% | |
| Fmr Llc | 0.00% | 211,002 | $66,623,786 | $67,299,088 | +$675,302 | +1.01% | |
| Hudson Bay Capital Management Lp | 0.33% | 203,138 | $64,140,823 | $64,790,865 | +$650,042 | +1.01% | |
| D. E. Shaw & Co., Inc. | 0.04% | 197,329 | $62,306,632 | $62,938,085 | +$631,453 | +1.01% | |
| Alpine Associates Management Inc. | 3.73% | 188,986 | $59,672,330 | $60,277,085 | +$604,755 | +1.01% | |
| Melqart Asset Management (Uk) Ltd | 5.58% | 185,734 | $58,645,511 | $59,239,859 | +$594,348 | +1.01% | |
| Caxton Associates Llp | 1.06% | 179,384 | $56,640,498 | $57,214,527 | +$574,029 | +1.01% | |
| Adage Capital Partners Gp, L.L.C. | 0.08% | 176,720 | $55,799,340 | $56,364,844 | +$565,504 | +1.01% | |
| Janus Henderson Group Plc | 0.03% | 167,054 | $54,849,328 | $53,281,873 | -$1,567,455 | -2.86% | |
| Birnam Oak Advisors, Lp | 8.84% | 171,277 | $54,080,713 | $54,628,799 | +$548,086 | +1.01% | |
| Glazer Capital, Llc | 1.23% | 158,127 | $49,929,000 | $50,434,607 | +$505,607 | +1.01% | |
| Westchester Capital Management, Llc | 2.50% | 157,472 | $49,721,784 | $50,225,694 | +$503,910 | +1.01% | |
| Water Island Capital Llc | 5.03% | 150,456 | $47,506,483 | $47,987,941 | +$481,458 | +1.01% | |
| Woodline Partners Lp | 0.14% | 145,844 | $46,050,243 | $46,516,944 | +$466,701 | +1.01% | |
| Verition Fund Management Llc | 0.32% | 142,309 | $44,934,067 | $45,389,456 | +$455,389 | +1.01% | |
| Decagon Asset Management Llp | 8.95% | 142,001 | $44,836,816 | $45,291,219 | +$454,403 | +1.01% | |
| Squarepoint Ops Llc | 0.08% | 138,413 | $43,703,905 | $44,146,826 | +$442,921 | +1.01% | |
| Slotnik Capital, Llc | 11.68% | 133,000 | $41,994,750 | $42,420,350 | +$425,600 | +1.01% |
Frequently asked questions about PEN
Who are the largest institutional holders of PEN?
The largest institutional holders of PEN reported in the latest SEC Form 13F filings include Blackrock, Inc., Hbk Investments L P, Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, and State Street Corp. InsiderSet ranks institutional holders by their latest reported PEN position.
What is PEN institutional ownership?
This page tracks PEN positions reported by institutional investment managers through SEC Form 13F. PENUMBRA INC (PEN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own PEN?
InsiderSet currently tracks 438 institutional managers reporting PEN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of PEN shareholders.
How much PEN stock do institutions own?
Institutional investment managers disclosed approximately $10.45B in PEN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was PEN institutional ownership last updated?
The latest PEN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional PEN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its PEN position after the reporting date.
Are institutions buying or selling PEN?
Institutional buying and selling can be analyzed by comparing PEN positions across consecutive 13F reporting periods. InsiderSet's PEN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View PEN ownership changes.
How has PEN institutional ownership changed over time?
InsiderSet tracks PEN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.