PEN · Penumbra Inc · Holdings

$317.55 -0.45 (-0.14%) At close · Oct 2

S&P 400 member Russell 1000 member Rebalance outlook locked

Market Cap

$12.56B

39.39M

Volume · Oct 2 239.68K Avg daily vol (3M) 342.99K

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.

Use institutional holdings through the 13F API or MCP →

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 454

Total Value: $11,033,458,003

Total Shares: 34,944,003

Showing 1–100 of 472 holdings by value · page 1 of 5

Institutional Ownership Trend

27 quarters

Superinvestors Holding PEN

All superinvestors →

Joel Greenblatt $10,139,048 Ray Dalio $498,885

Holder Concentration

Across 454 13F filers

Top Holder

12.3%

of institutional value

Top 5

30.8%

of institutional value

Top 10

45.3%

of institutional value

HHI

332

Broadly held

Showing 100 of 472

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

BlackRock, Inc.

$1,356,952,985

12.30%

4,297,555

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	60,193	$19,005,939	1.4%	Sole
BlackRock Investment Management (Australia) Ltd	85	$26,838	0.0%	Sole
BlackRock Asset Management Canada Ltd	5,199	$1,641,584	0.1%	Sole
BlackRock Investment Management, LLC	87,087	$27,497,720	2.0%	Sole
BLACKROCK ADVISORS LLC	166,073	$52,437,549	3.9%	Sole
BlackRock Fund Advisors	2,598,180	$820,375,335	60.5%	Sole
BlackRock Institutional Trust Company, N.A.	1,177,332	$371,742,579	27.4%	Sole
BlackRock Fund Managers Ltd.	6,938	$2,190,673	0.2%	Sole
BlackRock Investment Management (UK) Ltd.	24,770	$7,821,127	0.6%	Sole
BlackRock (Netherlands) B.V.	2,519	$795,374	0.1%	Sole
BlackRock Asset Management Ireland Ltd	57,575	$18,179,306	1.3%	Sole
BlackRock Advisors (UK) Ltd	577	$182,187	0.0%	Sole
BlackRock (Luxembourg) S.A.	64,303	$20,303,672	1.5%	Sole
BlackRock Life Ltd	108	$34,101	0.0%	Sole
BlackRock Asset Management Schweiz AG	6,375	$2,012,906	0.1%	Sole
Aperio Group, LLC	40,241	$12,706,095	0.9%	Sole

HBK INVESTMENTS L P

$580,508,901

5.26%

1,838,508

VANGUARD CAPITAL MANAGEMENT LLC

$539,893,662

4.89%

1,709,877

VANGUARD PORTFOLIO MANAGEMENT LLC

$526,442,397

4.77%

1,667,276

STATE STREET CORP

$392,558,713

3.56%

1,243,258

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	1,243,258	$392,558,713	100.0%	Defined

ExodusPoint Capital Management, LP

$344,303,272

3.12%

1,090,430

Balyasny Asset Management L.P.

$344,218,967

3.12%

1,090,163

JPMORGAN CHASE & CO

$338,311,597

3.07%

1,071,454

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Trust Co of Delaware	69	$21,786	0.0%	Other
JPMorgan Chase Bank, N.A.	159,073	$50,227,299	14.8%	Defined
J.P. Morgan Investment Management Inc.	119,056	$37,591,932	11.1%	Defined
J.P. Morgan Securities LLC	790,189	$249,502,176	73.7%	Defined
55I, LLC	2	$631	0.0%	Other
J.P. Morgan Markets Ltd	3,065	$967,773	0.3%	Defined

GOLDMAN SACHS GROUP INC

$267,473,087

2.42%

847,104

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	710,357	$224,295,222	83.9%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	136,747	$43,177,865	16.1%	Defined

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$263,620,622

2.39%

834,903

GEODE CAPITAL MANAGEMENT, LLC

$251,485,717

2.28%

796,471

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	149,505	$47,206,203	18.8%	Defined
Held directly	646,966	$204,279,514	81.2%	Defined

NORGES BANK

$237,520,411

2.15%

752,242

UBS Group AG

$222,231,795

2.01%

703,822

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	10,286	$3,247,804	1.5%	Defined
UBS AG	689,780	$217,798,035	98.0%	Defined
UBS Switzerland AG	3,666	$1,157,539	0.5%	Defined
UBS Securities LLC	90	$28,417	0.0%	Defined

MILLENNIUM MANAGEMENT LLC

$221,217,923

2.00%

700,611

MORGAN STANLEY

$186,868,423

1.69%

591,824

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	63	$19,892	0.0%	Defined
MORGAN STANLEY & CO. LLC	9,318	$2,942,158	1.6%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	346,839	$109,514,414	58.6%	Defined
MORGAN STANLEY INVESTMENT MANAGEMENT INC	1,345	$424,683	0.2%	Defined
MORGAN STANLEY SMITH BARNEY LLC	5,005	$1,580,328	0.8%	Defined
Morgan Stanley Bank, N.A.	28,763	$9,081,917	4.9%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	118,721	$37,486,155	20.1%	Defined
EATON VANCE MANAGEMENT	23,141	$7,306,770	3.9%	Defined
Calvert Research & Management	8,349	$2,636,196	1.4%	Defined
BOSTON MANAGEMENT & RESEARCH	50,280	$15,875,910	8.5%	Defined

AQR Arbitrage LLC

$178,042,899

1.61%

563,873

WHITEBOX ADVISORS LLC

$160,047,675

1.45%

506,881

Capital World Investors

$151,465,590

1.37%

479,701

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CAPITAL GROUP COMPANIES INC joint	479,701	$151,465,590	100.0%	Defined

CITADEL ADVISORS LLC

$141,696,917

1.28%

448,763

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	14,359	$4,533,854	3.2%	Defined
Held directly	434,404	$137,163,063	96.8%	Defined

NEUBERGER BERMAN GROUP LLC

$138,473,109

1.26%

438,553

CITIGROUP INC

$136,759,218

1.24%

433,125

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	433,125	$136,759,218	100.0%	Defined

TWO SIGMA INVESTMENTS, LP

$135,181,416

1.23%

428,128

TUDOR INVESTMENT CORP ET AL

$126,504,921

1.15%

400,649

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$108,527,379

0.98%

343,713

NORTHERN TRUST CORP

$105,164,956

0.95%

333,064

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	286,865	$90,577,623	86.1%	Defined
NORTHERN TRUST GLOBAL INVESTMENTS LTD	27,986	$8,836,579	8.4%	Defined
MASON STREET ADVISORS, LLC joint	18,213	$5,750,754	5.5%	Other

DIMENSIONAL FUND ADVISORS LP

$102,972,388

0.93%

326,120

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	3,702	$1,168,906	1.1%	Defined
DFA Australia Ltd.	8,943	$2,823,752	2.7%	Defined
Dimensional Fund Advisors Pte. Ltd.	148	$46,731	0.0%	Defined
Dimensional Ireland Ltd	23,110	$7,296,982	7.1%	Defined
Held directly	290,217	$91,636,017	89.0%	Sole

ALLIANCEBERNSTEIN L.P.

$95,225,463

0.86%

301,585

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	301,585	$95,225,463	100.0%	Defined

BANK OF AMERICA CORP /DE/

$83,994,866

0.76%

266,017

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	207,600	$65,549,700	78.0%	Defined
MERRILL LYNCH, PIERCE, FENNER & SMITH INC.	1,019	$321,749	0.4%	Defined
BOFA SECURITIES, INC.	35,799	$11,303,534	13.5%	Defined
MANAGED ACCOUNT ADVISORS LLC joint	18,257	$5,764,647	6.9%	Defined
BofA Securities Europe SA	3,342	$1,055,236	1.3%	Defined

Invesco Ltd.

$83,351,683

0.76%

263,980

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	25,058	$7,912,062	9.5%	Defined
Invesco Trust Co joint	15,563	$4,914,017	5.9%	Defined
Invesco Capital Management LLC	223,359	$70,525,604	84.6%	Defined

Magnetar Financial LLC

$80,781,795

0.73%

255,841

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Magnetar Asset Management LLC	77,523	$24,477,887	30.3%	Sole
Held directly	178,318	$56,303,908	69.7%	Sole

VANGUARD FIDUCIARY TRUST CO

$79,488,799

0.72%

251,746

Bank of New York Mellon Corp

$74,304,809

0.67%

235,328

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BNY Mellon Trust of Delaware joint	489	$154,401	0.2%	Defined
Mellon Investments Corporation joint	111,976	$35,356,420	47.6%	Defined
BNY Mellon Investment Adviser, Inc.	14,493	$4,576,164	6.2%	Defined
The Bank of New York Mellon	86,809	$27,409,941	36.9%	Defined
BNY Mellon, NA joint	21,089	$6,658,850	9.0%	Defined
Newton Investment Management North America, LLC joint	470	$148,402	0.2%	Defined
Held directly	2	$631	0.0%	Defined

Champlain Investment Partners, LLC

$69,159,354

0.63%

219,032

TIG Advisors, LLC

$67,912,141

0.62%

215,082

LMR Partners LLP

$67,536,714

0.61%

213,893

FMR LLC

$66,623,880

0.60%

211,002

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	204,544	$64,584,768	96.9%	Defined
STRATEGIC ADVISERS LLC	693	$218,814	0.3%	Defined
FIAM LLC	357	$112,722	0.2%	Defined
Fidelity Diversifying Solutions LLC	5,408	$1,707,576	2.6%	Defined

Hudson Bay Capital Management LP

$64,140,823

0.58%

203,138

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Hudson Bay Capital UK LLP	203,138	$64,140,823	100.0%	Defined

MILLENNIUM MANAGEMENT LLC

$63,150,000

0.57%

200,000

D. E. Shaw & Co., Inc.

$62,306,631

0.56%

197,329

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	189,773	$59,920,824	96.2%	Defined
D. E. Shaw Investment Management, L.L.C. joint	7,556	$2,385,807	3.8%	Defined

ALPINE ASSOCIATES MANAGEMENT INC.

$59,672,329

0.54%

188,986

Melqart Asset Management (UK) Ltd

$58,645,510

0.53%

185,734

CAXTON ASSOCIATES LLP

$56,640,498

0.51%

179,384

ADAGE CAPITAL PARTNERS GP, L.L.C.

$55,799,340

0.51%

176,720

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$55,540,425

0.50%

175,900

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	175,900	$55,540,425	100.0%	Other

Birnam Oak Advisors, LP

$54,080,712

0.49%

171,277

GLAZER CAPITAL, LLC

$49,928,600

0.45%

158,127

Westchester Capital Management, LLC

$49,721,783

0.45%

157,472

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WESTCHESTER CAPITAL PARTNERS, LLC	1,411	$445,523	0.9%	Sole
Virtus Investment Advisers, LLC	140,763	$44,445,917	89.4%	Other
Held directly	15,298	$4,830,343	9.7%	Sole

WATER ISLAND CAPITAL LLC

$47,506,482

0.43%

150,456

Woodline Partners LP

$46,050,243

0.42%

145,844

Verition Fund Management LLC

$44,934,066

0.41%

142,309

Decagon Asset Management LLP

$44,836,815

0.41%

142,001

Squarepoint Ops LLC

$43,703,904

0.40%

138,413

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	138,413	$43,703,904	100.0%	Defined

Slotnik Capital, LLC

$41,994,750

0.38%

133,000

WESTFIELD CAPITAL MANAGEMENT CO LP

$41,487,655

0.38%

131,394

Jupiter Topco LLC

$41,134,330

0.37%

130,275

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JANUS HENDERSON INVESTORS UK Ltd	17,918	$5,657,608	13.8%	Defined
JANUS HENDERSON INVESTORS US LLC	112,357	$35,476,722	86.2%	Defined

Holocene Advisors, LP

$40,419,789

0.37%

128,012

NATIXIS

$39,297,613

0.36%

124,458

Rock Springs Capital Management LP

$36,548,062

0.33%

115,750

Nuveen, LLC

$35,815,521

0.32%

113,430

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	21,386	$6,752,629	18.9%	Defined
TIAA CREF INVESTMENT MANAGEMENT LLC joint	16,002	$5,052,631	14.1%	Defined
TEACHERS ADVISORS, LLC joint	76,042	$24,010,261	67.0%	Defined

Amundi

$34,697,136

0.31%

109,888

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Amundi Asset Management joint	35,816	$11,308,902	32.6%	Defined
CPR Asset Management	74,072	$23,388,234	67.4%	Defined

RHUMBLINE ADVISERS

$34,473,585

0.31%

109,180

Kryger Capital LLC

$33,850,610

0.31%

107,207

HSBC HOLDINGS PLC

$31,968,108

0.29%

101,245

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC Bank USA, N.A.	8	$2,526	0.0%	Defined
HSBC Global Asset Management (UK) Ltd	1,195	$377,321	1.2%	Defined
HSBC BANK PLC	100,042	$31,588,261	98.8%	Defined

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

$30,845,298

0.28%

97,689

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	19,991	$6,312,158	20.5%	Defined
UBS Asset Management Switzerland AG	59,225	$18,700,292	60.6%	Defined
UBS Asset Management (UK) Ltd.	10,954	$3,458,725	11.2%	Defined
Held directly	7,519	$2,374,123	7.7%	Defined

Calamos Advisors LLC

$29,005,742

0.26%

91,863

MARSHALL WACE, LLP

$28,581,689

0.26%

90,520

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	90,520	$28,581,689	100.0%	Other

PRINCIPAL FINANCIAL GROUP INC

$28,061,649

0.25%

88,873

CAPITOLIS LIQUID GLOBAL MARKETS LLC

$27,258,697

0.25%

86,330

Empyrean Capital Partners, LP

$26,838,750

0.24%

85,000

Capula Management Ltd

$26,207,250

0.24%

83,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Capula Investment US LP	83,000	$26,207,250	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$26,202,513

0.24%

82,985

Man Group plc

$25,330,727

0.23%

80,224

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GLG LLC	18,685	$5,899,788	23.3%	Defined
GLG Partners LP	61,539	$19,430,939	76.7%	Defined

RENAISSANCE TECHNOLOGIES LLC

$25,102,125

0.23%

79,500

PICTON MAHONEY ASSET MANAGEMENT

$23,744,400

0.22%

75,200

Swiss National Bank

$23,674,935

0.21%

74,980

CARRET ASSET MANAGEMENT, LLC

$22,734,000

0.21%

72,000

C WorldWide Group Holding A/S

$22,734,000

0.21%

72,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 2	72,000	$22,734,000	100.0%	Defined

Susquehanna Portfolio Strategies, LLC

$21,137,883

0.19%

66,945

Quarry LP

$20,595,425

0.19%

65,227

Legal & General Group Plc

$20,495,963

0.19%

64,912

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	23,984	$7,572,948	36.9%	Defined
Legal & General Investment Management Ltd joint	40,928	$12,923,015	63.1%	Defined

California Public Employees Retirement System

$20,311,250

0.18%

64,327

PFM Health Sciences, LP

$19,014,780

0.17%

60,221

HARVEST MANAGEMENT LLC

$18,151,520

0.16%

57,487

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BOHRER NATHANIEL joint	57,487	$18,151,520	100.0%	Other

Sculptor Capital LP

$17,997,750

0.16%

57,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	57,000	$17,997,750	100.0%	Sole

GABELLI & Co INVESTMENT ADVISERS, INC.

$16,826,949

0.15%

53,292

GABELLI FUNDS LLC

$16,552,562

0.15%

52,423

CREDIT INDUSTRIEL ET COMMERCIAL

$16,443,628

0.15%

52,078

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Caisse Federale de Credit Mutuel	52,078	$16,443,628	100.0%	Defined

FIRST TRUST ADVISORS LP

$15,529,532

0.14%

49,183

MILLENNIUM MANAGEMENT LLC

$14,840,250

0.13%

47,000

BARCLAYS PLC

$14,825,409

0.13%

46,953

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	7,216	$2,278,452	15.4%	Defined
BARCLAYS CAPITAL INC.	39,394	$12,438,655	83.9%	Defined
BARCLAYS CAPITAL SECURITIES LTD	215	$67,886	0.5%	Defined
Barclays Investment Solutions Ltd	128	$40,416	0.3%	Defined

PRICE T ROWE ASSOCIATES INC /MD/

$14,090,028

0.13%

44,624

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	42,524	$13,426,953	95.3%	Defined
Held directly	2,100	$663,075	4.7%	Sole

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$13,667,554

0.12%

43,286

SG Americas Securities, LLC

$12,954,906

0.12%

41,029

Retirement Systems of Alabama

$12,844,710

0.12%

40,680

Walleye Trading LLC

$12,251,100

0.11%

38,800

CSS LLC/IL

$12,232,155

0.11%

38,740

STATE OF WISCONSIN INVESTMENT BOARD

$11,976,713

0.11%

37,931

CITADEL ADVISORS LLC

$11,872,200

0.11%

37,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	37,600	$11,872,200	100.0%	Defined

Walleye Trading LLC

$11,619,600

0.11%

36,800

PRELUDE CAPITAL MANAGEMENT, LLC

$11,487,300

0.10%

36,381

Key facts CIK 1321732 CUSIP 70975L107 13F (30d) 12 filings 10 filers Visit website Investor relations