PENUMBRA INC (PEN) Institutional Shareholders
PENUMBRA INC (PEN) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $10.59B in PEN holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PEN tracked by InsiderSet, reporting ownership valued at approximately $1.42B in its March 31, 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 $1.39B, representing an estimated loss of -2.19% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed PEN value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio 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
467
Total Reported Value
$10.59B
Largest Holder
Blackrock, Inc.
Largest Position
$1.42B
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
76
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% | 4,330,456 | $1,421,991,758 | $1,390,899,163 | -$31,092,595 | -2.19% | |
| Vanguard Capital Management Llc | 0.01% | 1,694,488 | $556,419,025 | $544,252,601 | -$12,166,424 | -2.19% | |
| Vanguard Portfolio Management Llc | 0.03% | 1,654,477 | $543,280,612 | $531,401,468 | -$11,879,144 | -2.19% | |
| Hbk Investments L P | 6.76% | 1,634,261 | $536,642,285 | $524,908,291 | -$11,733,994 | -2.19% | |
| State Street Corp | 0.01% | 1,185,811 | $389,384,758 | $380,870,635 | -$8,514,123 | -2.19% | |
| Millennium Management Llc | 0.27% | 1,098,136 | $360,594,918 | $352,710,302 | -$7,884,616 | -2.19% | |
| Baillie Gifford & Co | 0.28% | 840,427 | $275,971,015 | $269,936,748 | -$6,034,267 | -2.19% | |
| Geode Capital Management, Llc | 0.02% | 795,448 | $261,261,457 | $255,489,943 | -$5,771,514 | -2.21% | |
| Balyasny Asset Management L.P. | 0.49% | 762,096 | $250,249,464 | $244,777,614 | -$5,471,850 | -2.19% | |
| Goldman Sachs Group Inc | 0.03% | 720,575 | $236,615,213 | $231,441,484 | -$5,173,729 | -2.19% | |
| Citigroup Inc | 0.13% | 620,943 | $203,899,053 | $199,440,682 | -$4,458,371 | -2.19% | |
| Ubs Group Ag | 0.03% | 560,335 | $183,997,205 | $179,973,999 | -$4,023,206 | -2.19% | |
| Invesco Ltd. | 0.03% | 538,197 | $176,727,749 | $172,863,494 | -$3,864,255 | -2.19% | |
| Fmr Llc | 0.01% | 496,107 | $162,906,494 | $159,344,607 | -$3,561,887 | -2.19% | |
| Champlain Investment Partners, Llc | 2.05% | 491,382 | $161,355,107 | $157,826,985 | -$3,528,122 | -2.19% | |
| Exoduspoint Capital Management, Lp | 1.55% | 465,215 | $152,762,650 | $149,422,406 | -$3,340,244 | -2.19% | |
| Capital World Investors | 0.02% | 450,815 | $148,034,122 | $144,797,270 | -$3,236,852 | -2.19% | |
| Whitebox Advisors Llc | 2.10% | 445,001 | $146,124,978 | $142,929,871 | -$3,195,107 | -2.19% | |
| Aqr Arbitrage Llc | 2.28% | 423,073 | $138,924,481 | $135,886,817 | -$3,037,664 | -2.19% | |
| Tudor Investment Corp Et Al | 0.73% | 411,118 | $134,998,818 | $132,046,990 | -$2,951,828 | -2.19% | |
| Morgan Stanley | 0.01% | 401,356 | $131,794,220 | $128,911,534 | -$2,882,686 | -2.19% | |
| Arrowstreet Capital, Limited Partnership | 0.07% | 400,160 | $131,400,539 | $128,527,390 | -$2,873,149 | -2.19% | |
| Hudson Bay Capital Management Lp | 0.73% | 349,038 | $114,613,608 | $112,107,515 | -$2,506,093 | -2.19% | |
| Amundi | 0.03% | 345,758 | $113,536,555 | $111,054,012 | -$2,482,543 | -2.19% | |
| Dimensional Fund Advisors Lp | 0.02% | 325,843 | $106,999,890 | $104,657,513 | -$2,342,377 | -2.19% | |
| Charles Schwab Investment Management Inc | 0.02% | 322,416 | $105,871,742 | $103,556,795 | -$2,314,947 | -2.19% | |
| Northern Trust Corp | 0.01% | 320,853 | $105,358,499 | $103,054,775 | -$2,303,724 | -2.19% | |
| Neuberger Berman Group Llc | 0.08% | 303,621 | $99,700,028 | $97,520,029 | -$2,179,999 | -2.19% | |
| Lmr Partners Llp | 0.90% | 295,708 | $97,101,636 | $94,978,453 | -$2,123,183 | -2.19% | |
| Bank Of America Corp | 0.01% | 259,775 | $85,302,315 | $83,437,132 | -$1,865,183 | -2.19% | |
| Magnetar Financial Llc | 0.84% | 251,433 | $82,563,055 | $80,757,765 | -$1,805,290 | -2.19% | |
| Vanguard Fiduciary Trust Co | 0.02% | 247,235 | $81,184,557 | $79,409,410 | -$1,775,147 | -2.19% | |
| Bank Of New York Mellon Corp | 0.01% | 246,527 | $80,952,228 | $79,182,007 | -$1,770,221 | -2.19% | |
| Woodline Partners Lp | 0.30% | 241,597 | $79,333,207 | $77,598,540 | -$1,734,667 | -2.19% | |
| Alliancebernstein L.P. | 0.02% | 226,317 | $70,364,218 | $72,690,757 | +$2,326,539 | +3.31% | |
| Bank Of Nova Scotia | 0.12% | 211,820 | $69,555,334 | $68,034,466 | -$1,520,868 | -2.19% | |
| Soros Fund Management Llc | 0.92% | 203,434 | $66,801,623 | $65,340,966 | -$1,460,657 | -2.19% | |
| Citadel Advisors Llc | 0.05% | 202,725 | $66,568,808 | $65,113,243 | -$1,455,565 | -2.19% | |
| D. E. Shaw & Co., Inc. | 0.05% | 201,950 | $66,314,322 | $64,864,321 | -$1,450,002 | -2.19% | |
| Caxton Associates Llp | 1.41% | 184,663 | $60,637,789 | $59,311,909 | -$1,325,880 | -2.19% | |
| Decagon Asset Management Llp | 14.30% | 167,588 | $55,030,872 | $53,827,590 | -$1,203,282 | -2.19% | |
| Janus Henderson Group Plc | 0.03% | 167,054 | $54,849,328 | $53,656,074 | -$1,193,254 | -2.18% | |
| Kryger Capital Llc | 3.57% | 153,848 | $50,519,068 | $49,414,439 | -$1,104,629 | -2.19% | |
| Squarepoint Ops Llc | 0.10% | 147,806 | $48,535,056 | $47,473,809 | -$1,061,247 | -2.19% | |
| Pfm Health Sciences, Lp | 4.83% | 139,779 | $45,899,230 | $44,895,617 | -$1,003,613 | -2.19% | |
| Capitolis Liquid Global Markets Llc | 0.29% | 139,398 | $45,774,121 | $44,773,244 | -$1,000,877 | -2.19% | |
| Adage Capital Partners Gp, L.L.C. | 0.07% | 135,000 | $44,329,950 | $43,360,650 | -$969,300 | -2.19% | |
| Alpine Associates Management Inc. | 2.55% | 131,950 | $43,328,421 | $42,381,021 | -$947,401 | -2.19% | |
| Rock Springs Capital Management Lp | 2.33% | 120,500 | $39,568,585 | $38,703,395 | -$865,190 | -2.19% | |
| Water Island Capital Llc | 5.26% | 120,095 | $39,435,596 | $38,573,313 | -$862,283 | -2.19% |
Frequently asked questions about PEN
Who owns the most PEN stock?
The largest holders of PEN are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for PENUMBRA INC (PEN).
Is PEN widely held by superinvestors?
Many widely followed stocks like PEN appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly PEN is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.