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Equibles

PEN

Penumbra Inc

Company with tickers: PEN

CIK
1321732
CUSIP
70975L107
Shares Outstanding
39,331,425
13F Activity (30d)
153 filings 150 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 411
Total Value: $6,069,399,401
Total Shares: 18,483,417
Showing 1–100 of 419 holdings by value · page 1 of 5

Institutional Ownership Trend

25 quarters

Superinvestors Holding PEN

All superinvestors →
George Soros $66,801,622 Ray Dalio $3,296,178 Joel Greenblatt $2,914,283

Holder Concentration

Across 411 13F filers · Δ vs Dec 31, 2025
Top Holder
10.3%
Jun 2023 → Mar 2026 · range 10.3% – 16.9%
−0.5 pts
Top 5
36.0%
Jun 2023 → Mar 2026 · range 34.2% – 54.5%
+1.8 pts
Top 10
48.8%
Jun 2023 → Mar 2026 · range 46.0% – 65.7%
+2.8 pts
HHI
361
Jun 2023 → Mar 2026 · range 327 – 688
Broadly held+34

Quarterly Activity

vs Dec 31, 2025
New
113
Increased
130
Decreased
110
Sold Out
88
Unchanged
58
Holder count: +25
Institutional value: +81.1%
Shares held: +71.4%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega CITIGROUP INC +573,293 620,943
Large ExodusPoint Capital Management, LP +443,465 465,215
Mega NEUBERGER BERMAN GROUP LLC +298,578 303,621
Mega D. E. Shaw & Co., Inc. +194,426 201,950
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP +166,831 223,031

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega Clearbridge Investments, LLC −593,679 97,135
Large Holocene Advisors, LP −360,734 110,614
Mega RAYMOND JAMES FINANCIAL INC −159,920 7,841
Large VOYA INVESTMENT MANAGEMENT LLC −111,550 33,907
Mid Champlain Investment Partners, LLC −110,422 491,382

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 3,685,117 $1,210,081,868
Mid HBK INVESTMENTS L P 1,634,261 $536,642,284
Mid AQR Arbitrage LLC 423,073 $138,924,481
Large TUDOR INVESTMENT CORP ET AL 411,118 $134,998,817
Mega VANGUARD FIDUCIARY TRUST CO 247,235 $81,184,556

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mid SAMLYN CAPITAL, LLC 212,956 $66,210,147
Large Jain Global LLC 183,024 $56,903,991
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. 178,837 $55,602,211
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 173,846 $54,050,459
Mega UBS Group AG 150,372 $46,752,157
Filter: New 113 Increased 130 Reduced 110 Sold out 88 Unchanged 58
Showing 100 of 419
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega VANGUARD CAPITAL MANAGEMENT LLC $653,662,844 10.77% 1,990,629
Mega VANGUARD CAPITAL MANAGEMENT LLC $556,419,024 9.17% 1,694,488
Mid HBK INVESTMENTS L P $536,642,284 8.84% 1,634,261
Mega STATE STREET CORP $389,384,758 6.42% 1,185,811
Mega GEODE CAPITAL MANAGEMENT, LLC $261,201,259 4.30% 795,448
Mega CITIGROUP INC $203,899,052 3.36% 620,943
Mid Champlain Investment Partners, LLC $161,355,107 2.66% 491,382
Large ExodusPoint Capital Management, LP $152,762,649 2.52% 465,215
Mid AQR Arbitrage LLC $138,924,481 2.29% 423,073
Large TUDOR INVESTMENT CORP ET AL $134,998,817 2.22% 411,118
Mega NORTHERN TRUST CORP Bank $105,358,497 1.74% 320,853
Large CONGRESS ASSET MANAGEMENT CO $104,203,950 1.72% 317,337
Mega NEUBERGER BERMAN GROUP LLC $99,700,027 1.64% 303,621
Mega VANGUARD FIDUCIARY TRUST CO Bank $81,184,556 1.34% 247,235
Large BANK OF NOVA SCOTIA Bank $69,555,333 1.15% 211,820
Mid SOROS FUND MANAGEMENT LLC $66,801,622 1.10% 203,434
Mega D. E. Shaw & Co., Inc. $66,314,320 1.09% 201,950
Mid CAXTON ASSOCIATES LLP $60,637,789 1.00% 184,663
Small Decagon Asset Management LLP $55,030,871 0.91% 167,588
Mid Kryger Capital LLC $50,519,067 0.83% 153,848
Large Squarepoint Ops LLC $48,535,056 0.80% 147,806
Small PFM Health Sciences, LP $45,899,230 0.76% 139,779
Large CAPITOLIS LIQUID GLOBAL MARKETS LLC $45,774,121 0.75% 139,398
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $44,329,950 0.73% 135,000
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $43,903,069 0.72% 133,700
Mid ALPINE ASSOCIATES MANAGEMENT INC. $43,328,421 0.71% 131,950
Mid Rock Springs Capital Management LP $39,568,585 0.65% 120,500
Small WATER ISLAND CAPITAL LLC $39,435,595 0.65% 120,095
Large NATIXIS $38,166,116 0.63% 116,229
Large Holocene Advisors, LP $36,322,319 0.60% 110,614
Mega RHUMBLINE ADVISERS $36,177,508 0.60% 110,173
Mega HSBC HOLDINGS PLC $36,177,505 0.60% 110,173
Mid BRAIDWELL LP $34,594,436 0.57% 105,352
Large SG Americas Securities, LLC Broker-Dealer $33,505,232 0.55% 102,035
Mid Capula Management Ltd $33,421,170 0.55% 101,779
Small Slotnik Capital, LLC $33,165,370 0.55% 101,000
Mega Nuveen, LLC $33,079,992 0.55% 100,740
Mega Clearbridge Investments, LLC $31,896,219 0.53% 97,135
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $31,758,298 0.52% 96,715
Small Birnam Oak Advisors, LP $31,520,236 0.52% 95,990
Mega PRINCIPAL FINANCIAL GROUP INC $28,955,009 0.48% 88,178
Small Sand Grove Capital Management LLP $28,488,724 0.47% 86,758
Mega BNP PARIBAS ARBITRAGE, SA $28,382,004 0.47% 86,433
Mid Melqart Asset Management (UK) Ltd $26,867,890 0.44% 81,822
Mid Alberta Investment Management Corp $26,269,600 0.43% 80,000
Mega FIRST TRUST ADVISORS LP $24,700,976 0.41% 75,223
Large Man Group plc $24,519,387 0.40% 74,670
Mega Swiss National Bank Bank $24,161,464 0.40% 73,580
Mid C WorldWide Group Holding A/S $23,642,640 0.39% 72,000
Small CARRET ASSET MANAGEMENT, LLC $23,642,640 0.39% 72,000
Mid Susquehanna Portfolio Strategies, LLC $23,126,442 0.38% 70,428
Mega AMERICAN CENTURY COMPANIES INC $22,983,929 0.38% 69,994
Mid NZS Capital, LLC $22,652,932 0.37% 68,986
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $22,279,904 0.37% 67,850
Large Calamos Advisors LLC $21,962,042 0.36% 66,882
Mega Legal & General Group Plc $20,094,601 0.33% 61,195
Mega California Public Employees Retirement System Pension $19,840,443 0.33% 60,421
Mid TIG Advisors, LLC $19,729,126 0.33% 60,082
Mega TWO SIGMA INVESTMENTS, LP $19,117,373 0.31% 58,219
Large GABELLI FUNDS LLC $18,593,294 0.31% 56,623
Large ING GROEP NV $18,336,509 0.30% 55,841
Small GABELLI & Co INVESTMENT ADVISERS, INC. $16,974,102 0.28% 51,692
Mid Nearwater Capital Markets, Ltd $16,418,500 0.27% 50,000
Micro Ursa Fund Management, LLC $16,352,826 0.27% 49,800
Large Retirement Systems of Alabama Pension $15,792,626 0.26% 48,094
Mid PRELUDE CAPITAL MANAGEMENT, LLC $15,747,968 0.26% 47,958
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $14,951,014 0.25% 45,531
Large OSAIC HOLDINGS, INC. $14,852,502 0.24% 45,231
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $14,382,606 0.24% 43,800
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $14,115,641 0.23% 42,987
Small PSquared Asset Management AG $14,049,310 0.23% 42,785
Large Caisse de depot et placement du Quebec $13,693,029 0.23% 41,700
Large Walleye Trading LLC $12,970,615 0.21% 39,500
Small Quarry LP $12,919,717 0.21% 39,345
Large TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY Pension $12,807,412 0.21% 39,003
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM Pension $12,138,853 0.20% 36,967
Large MARSHALL WACE, LLP $11,913,262 0.20% 36,280
Large Walleye Trading LLC $11,722,809 0.19% 35,700
Micro Ursa Fund Management, LLC $11,492,950 0.19% 35,000
Large VOYA INVESTMENT MANAGEMENT LLC $11,134,041 0.18% 33,907
Mega VANGUARD ASSET MANAGEMENT, Ltd $11,032,575 0.18% 33,598
Mid ALGERT GLOBAL LLC $10,992,185 0.18% 33,475
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $10,988,902 0.18% 33,465
Small CIBRA Capital Ltd $10,376,492 0.17% 31,600
Mid CITIZENS FINANCIAL GROUP INC/RI $10,262,875 0.17% 31,254
Small Cordgrass Capital Advisors, LLC $9,951,909 0.16% 30,307
Large SEI INVESTMENTS CO $9,438,667 0.16% 28,744
Mid SummitTX Capital, L.P. $9,201,584 0.15% 28,022
Small Onyx Bridge Wealth Group LLC $8,777,330 0.14% 26,730
Mid Aquatic Capital Management LLC $8,529,410 0.14% 25,975
Small CREDIT INDUSTRIEL ET COMMERCIAL $8,477,528 0.14% 25,817
Small Mint Tower Capital Management B.V. $8,373,435 0.14% 25,500
Mid MOORE CAPITAL MANAGEMENT, LP $8,209,250 0.14% 25,000
Small EQUITEC PROPRIETARY MARKETS, LLC $8,143,576 0.13% 24,800
Mid NINE MASTS CAPITAL Ltd $7,796,488 0.13% 23,743
Large NATIXIS ADVISORS, LLC $7,781,055 0.13% 23,696
Large Tidal Investments LLC $7,764,636 0.13% 23,646
Large Mariner, LLC $7,437,252 0.12% 22,649
Large CANADA LIFE ASSURANCE Co Insurance $7,326,591 0.12% 22,312
Large NATIONAL BANK OF CANADA /FI/ Bank $7,224,140 0.12% 22,000

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