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 440 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

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	FMR LLC CIK 315066 · View history	$1.60B 5,131,942 shares	0.08%	-759.72K(-12.90%)Reduced	SEC filing ↗ Feb 17, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$1.29B 4,141,230 shares	0.02%	-29.66K(-0.70%)Reduced	SEC filing ↗ Feb 12, 2026	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$1.17B 3,770,569 shares	0.02%	-64.91K(-1.70%)Reduced	SEC filing ↗ Jan 29, 2026	▾
04	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$511.17M 1,644,094 shares	0.06%	-150.17K(-8.40%)Reduced	SEC filing ↗ Feb 17, 2026	▾
05	STATE STREET CORP CIK 93751 · View history	$359.85M 1,157,417 shares	0.01%	-7.53K(-0.60%)Reduced	SEC filing ↗ Feb 13, 2026	▾
06	CITADEL ADVISORS LLC CIK 1423053 · View history	$307.89M 990,275 shares	0.21%	+19.28K(+2.00%)Added	SEC filing ↗ Feb 17, 2026	▾
07	BAILLIE GIFFORD & CO CIK 1088875 · View history	$272.46M 876,325 shares	0.23%	-32.22K(-3.50%)Reduced	SEC filing ↗ Jan 23, 2026	▾
08	RTW INVESTMENTS, LP CIK 1493215 · View history	$269.40M 866,499 shares	2.70%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
09	JPMORGAN CHASE & CO CIK 19617 · View history	$247.95M 797,490 shares	0.02%	-46.21K(-5.50%)Reduced	SEC filing ↗ Feb 11, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$238.37M 766,510 shares	0.01%	+18.74K(+2.50%)Added	SEC filing ↗ Feb 9, 2026	▾
11	Clearbridge Investments, LLC CIK 1348883 · View history	$214.78M 690,814 shares	0.17%	-66.69K(-8.80%)Reduced	SEC filing ↗ Feb 11, 2026	▾
12	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$210.74M 677,832 shares	0.15%	+444.53K(+190.50%)Added	SEC filing ↗ Feb 17, 2026	▾
13	Invesco Ltd. CIK 914208 · Amended · View history	$198.46M 638,305 shares	0.02%	+7.21K(+1.10%)Added	SEC filing ↗ Feb 19, 2026	▾
14	Champlain Investment Partners, LLC CIK 1315478 · View history	$187.11M 601,804 shares	1.89%	-116.10K(-16.20%)Reduced	SEC filing ↗ Feb 13, 2026	▾
15	Artisan Partners Limited Partnership CIK 1466153 · View history	$184.72M 594,112 shares	0.28%	+370.64K(+165.90%)Added	SEC filing ↗ Feb 17, 2026	▾
16	MORGAN STANLEY CIK 895421 · Amended · View history	$163.39M 525,507 shares	0.01%	-167.95K(-24.20%)Reduced	SEC filing ↗ May 27, 2026	▾
17	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$147.96M 475,898 shares	0.07%	+7.05K(+1.50%)Added	SEC filing ↗ Feb 17, 2026	▾
18	Holocene Advisors, LP CIK 1700574 · View history	$146.55M 471,348 shares	0.31%	+161.13K(+51.90%)Added	SEC filing ↗ Feb 17, 2026	▾
19	Capital World Investors CIK 1422849 · View history	$132.59M 426,456 shares	0.02%	+10.72K(+2.60%)Added	SEC filing ↗ Feb 11, 2026	▾
20	CONGRESS ASSET MANAGEMENT CO /MA CIK 897378 · View history	$118.88M 382,350 shares	0.84%	-46.82K(-10.90%)Reduced	SEC filing ↗ Jan 9, 2026	▾

Showing 20 / 440 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

440

Cancelled or null records excluded

Disclosed shares

36,797,272

Not deduplicated across managers

Disclosed value

$11.44B

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 · Q4 2025

Explore all 440 reporting institutions.

This page includes 20 of 440 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.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 440 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"70975L107","quarter":"2025Q4","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

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.