PEN · Penumbra Inc · Shareholders & Ownership
Every disclosed holder of PEN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns PEN
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 34,131,853 | 86.65% |
| Insiders (Forms 3, 4, 5) | 1,139,639 | 2.89% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 4,117,930 | 10.45% |
| Registered funds (N-PORT, not summed) | 10,480,485 | 26.61% |
Shares outstanding: 39,389,422, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of PEN
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,297,555 | ||
| 1.1 |
iShares Core S&P Mid-Cap ETF
Fund
S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,345,979 | ||
| 1.2 |
iShares S&P Mid-Cap 400 Growth ETF
Fund
S000004308 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
235,277 | ||
| 1.3 |
iShares Russell Mid-Cap Growth ETF
Fund
S000004336 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
224,266 | ||
| 1.4 |
iShares U.S. Medical Devices ETF
Fund
S000009419 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
184,183 | ||
| 1.5 |
iShares Russell Mid-Cap ETF
Fund
S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
156,357 | ||
| 2 |
HBK INVESTMENTS L P
13F
CIK 1011443 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,838,508 | ||
| 3 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,709,877 | ||
| 4 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,667,276 | ||
| 5 |
|
1,243,258 | ||
| 5.1 |
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund
S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
199,102 | ||
| 5.2 |
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Growth ETF
Fund
S000006987 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
60,839 | ||
| 5.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
13,076 | ||
| 5.4 |
State Street(R) SPDR(R) S&P(R) Health Care Equipment ETF
Fund
S000012330 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
7,782 | ||
| 5.5 |
State Street Institutional Small-Cap Equity Fund
Fund
S000001631 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL FUNDS, not summed
|
7,300 | ||
| 6 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,186,100 | ||
| 7 |
ExodusPoint Capital Management, LP
13F
CIK 1736225 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,090,430 | ||
| 8 |
Balyasny Asset Management L.P.
13F
CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,090,163 | ||
| 9 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,071,454 | ||
| 10 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
856,690 | ||
| 11 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
847,104 | ||
| 11.1 |
Goldman Sachs U.S. Equity Dividend and Premium Fund
Fund
S000009324 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
3,741 | ||
| 11.2 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
1,922 | ||
| 11.3 |
Goldman Sachs MarketBeta U.S. 1000 Equity ETF
Fund
S000075322 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust II, not summed
|
1,258 | ||
| 11.4 |
Goldman Sachs Future Health Care Equity ETF
Fund
S000072296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
1,015 | ||
| 11.5 |
Goldman Sachs MarketBeta(R) Russell 1000 Growth Equity ETF
Fund
S000083005 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
661 | ||
| 12 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
834,903 | ||
| 13 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
796,471 | ||
| 14 |
NORGES BANK
13F
CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
752,242 | ||
| 15 |
|
703,822 | ||
| 16 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
700,611 | ||
| 17 |
|
683,042 | ||
| 18 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
591,824 | ||
| 18.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
49 | ||
| 19 |
AQR Arbitrage LLC
13F
CIK 1167456 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
563,873 | ||
| 20 |
WHITEBOX ADVISORS LLC
13F
CIK 1257391 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
506,881 | ||
| 21 |
VANGUARD SMALL-CAP GROWTH INDEX FUND
Fund
S000002846 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
494,387 | ||
| 22 |
Capital World Investors
13F
CIK 1422849 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
479,701 | ||
| 23 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
450,774 | ||
| 24 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
448,763 | ||
| 25 |
NEUBERGER BERMAN GROUP LLC
13F
CIK 1465109 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
438,553 | ||
| 26 |
|
433,125 | ||
| 27 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
428,128 | ||
| 28 |
SMALLCAP World Fund Inc
Fund
S000009599 · Registered fund · Jun 30, 2026
SMALLCAP World Fund Inc, not summed
|
412,644 | ||
| 29 |
TUDOR INVESTMENT CORP ET AL
13F
CIK 923093 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
400,649 | ||
| 30 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
343,713 | ||
| 30.1 |
Schwab U.S. Mid-Cap ETF
Fund
S000026635 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
106,066 | ||
| 30.2 |
Schwab U.S. Large-Cap Growth ETF
Fund
S000026633 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
83,485 | ||
| 30.3 |
Schwab U.S. Large-Cap ETF
Fund
S000026632 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
41,807 | ||
| 30.4 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
24,193 | ||
| 30.5 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
23,095 | ||
| 31 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
333,064 | ||
| 31.1 |
Mid Cap Index Fund
Fund
S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
25,564 | ||
| 31.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
1,422 | ||
| 32 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
326,120 | ||
| 32.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
64,949 | ||
| 32.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
59,193 | ||
| 32.3 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
27,709 | ||
| 32.4 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
25,454 | ||
| 32.5 |
U.S. CORE EQUITY 1 PORTFOLIO
Fund
S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
20,663 | ||
| 33 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
301,585 | ||
| 33.1 |
AB All Market Total Return Portfolio
Fund
S000010512 · Registered fund · Jun 30, 2026
AB PORTFOLIOS, not summed
|
4,939 | ||
| 34 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
266,017 | ||
| 35 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
263,980 | ||
| 35.1 |
Invesco S&P MidCap Momentum ETF
Fund
S000003056 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
190,494 | ||
| 35.2 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
12,870 | ||
| 35.3 |
Invesco S&P Midcap 400 Pure Growth ETF
Fund
S000060795 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
10,222 | ||
| 35.4 |
Invesco Russell 1000 Dynamic Multifactor ETF
Fund
S000064607 · Registered fund · May 31, 2026
Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
|
6,133 | ||
| 35.5 |
Invesco S&P Midcap 400 QVM Multi-Factor ETF
Fund
S000072319 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
5,014 | ||
| 36 |
|
259,609 | ||
| 37 |
Magnetar Financial LLC
13F
CIK 1352851 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
255,841 | ||
| 38 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
251,746 | ||
| 39 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
235,328 | ||
| 39.1 |
BNY Mellon US Mid Cap Core Equity ETF
Fund
S000067261 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
|
6,335 | ||
| 40 |
Champlain Investment Partners, LLC
13F
CIK 1315478 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
219,032 | ||
| 40.1 |
Champlain MidCap Fund
Fund
S000022606 · Registered fund · Jun 30, 2026
ADVISORS' INNER CIRCLE FUND II, not summed
|
76,000 | ||
| 40.2 |
Champlain Small Company Fund
Fund
S000005803 · Registered fund · Jun 30, 2026
ADVISORS' INNER CIRCLE FUND II, not summed
|
44,000 | ||
| 41 |
TIG Advisors, LLC
13F
CIK 1358253 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
215,082 | ||
| 42 |
LMR Partners LLP
13F
CIK 1578621 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
213,893 | ||
| 43 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
211,002 | ||
| 43.1 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
202,400 | ||
| 43.2 |
Fidelity Mid Cap Index Fund
Fund
S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
144,265 | ||
| 43.3 |
VIP Contrafund Portfolio
Fund
S000007724 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund II, not summed
|
124,665 | ||
| 43.4 |
Fidelity SAI Merger Arbitrage Fund
Fund
S000091043 · Registered fund · Jul 31, 2026
Fidelity Greenwood Street Trust, not summed
|
80,000 | ||
| 43.5 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
74,126 | ||
| 44 |
Hudson Bay Capital Management LP
13F
CIK 1393825 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
203,138 | ||
| 45 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
197,329 | ||
| 46 |
ALPINE ASSOCIATES MANAGEMENT INC.
13F
CIK 1396835 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
188,986 | ||
| 47 |
Melqart Asset Management (UK) Ltd
13F
CIK 1712901 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
185,734 | ||
| 48 |
CAXTON ASSOCIATES LLP
13F
CIK 2051323 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
179,384 | ||
| 49 |
ADAGE CAPITAL PARTNERS GP, L.L.C.
13F
CIK 1165408 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
176,720 | ||
| 50 |
Birnam Oak Advisors, LP
13F
CIK 1997245 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
171,277 |
70 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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