Company · Ownership research

Penumbra Inc PEN

CIK 0001321732 · CUSIP 70975L107

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 70975L107 (PEN), not CUSIP 70975L907 (PEN), and does not merge CUSIPs.

This page lists the top 20 of 485 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$1.42B 4,330,456 shares	0.02%	+189.23K(+4.60%)Added	SEC filing ↗ May 13, 2026	▾
02	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$556.42M 1,694,488 shares	0.01%	—	SEC filing ↗ May 15, 2026	▾
03	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$543.28M 1,654,477 shares	0.03%	—	SEC filing ↗ May 8, 2026	▾
04	HBK INVESTMENTS L P CIK 1011443 · View history	$536.64M 1,634,261 shares	6.76%	+1.63MNew	SEC filing ↗ May 15, 2026	▾
05	STATE STREET CORP CIK 93751 · View history	$389.38M 1,185,811 shares	0.01%	+28.39K(+2.50%)Added	SEC filing ↗ May 15, 2026	▾
06	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$360.59M 1,098,136 shares	0.27%	+420.30K(+62.00%)Added	SEC filing ↗ May 15, 2026	▾
07	BAILLIE GIFFORD & CO CIK 1088875 · View history	$275.97M 840,427 shares	0.28%	-35.90K(-4.10%)Reduced	SEC filing ↗ May 8, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$261.26M 795,448 shares	0.02%	+28.94K(+3.80%)Added	SEC filing ↗ May 15, 2026	▾
09	Balyasny Asset Management L.P. CIK 1218710 · View history	$250.25M 762,096 shares	0.49%	+600.18K(+370.70%)Added	SEC filing ↗ May 15, 2026	▾
10	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$236.62M 720,575 shares	0.03%	+402.42K(+126.50%)Added	SEC filing ↗ May 15, 2026	▾
11	CITIGROUP INC CIK 831001 · View history	$203.90M 620,943 shares	0.13%	+573.29K(+1,203.10%)Added	SEC filing ↗ May 11, 2026	▾
12	UBS Group AG CIK 1610520 · View history	$184.00M 560,335 shares	0.03%	+409.96K(+272.60%)Added	SEC filing ↗ May 5, 2026	▾
13	Invesco Ltd. CIK 914208 · Amended · View history	$176.73M 538,197 shares	0.02%	-100.11K(-15.70%)Reduced	SEC filing ↗ May 12, 2026	▾
14	FMR LLC CIK 315066 · View history	$162.91M 496,107 shares	0.01%	-4.64M(-90.30%)Reduced	SEC filing ↗ May 15, 2026	▾
15	Champlain Investment Partners, LLC CIK 1315478 · View history	$161.36M 491,382 shares	2.05%	-110.42K(-18.30%)Reduced	SEC filing ↗ May 13, 2026	▾
16	ExodusPoint Capital Management, LP CIK 1736225 · Amended · View history	$152.76M 465,215 shares	1.52%	+443.46K(+2,038.90%)Added	SEC filing ↗ May 14, 2026	▾
17	Capital World Investors CIK 1422849 · View history	$148.03M 450,815 shares	0.02%	+24.36K(+5.70%)Added	SEC filing ↗ May 13, 2026	▾
18	WHITEBOX ADVISORS LLC CIK 1257391 · Amended · View history	$146.12M 445,001 shares	2.07%	+445.00KNew	SEC filing ↗ May 15, 2026	▾
19	AQR Arbitrage LLC CIK 1167456 · View history	$138.92M 423,073 shares	2.28%	+423.07KNew	SEC filing ↗ May 15, 2026	▾
20	TUDOR INVESTMENT CORP ET AL CIK 923093 · View history	$135.00M 411,118 shares	0.73%	+411.12KNew	SEC filing ↗ May 15, 2026	▾

Showing 20 / 485 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

485

Cancelled or null records excluded

Disclosed shares

33,846,337

Not deduplicated across managers

Disclosed value

$11.11B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Penumbra Inc · Q1 2026

Explore all 485 reporting institutions.

This page includes 20 of 485 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.