Penumbra Inc PEN
CIK 0001321732 · CUSIP 70975L107
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | FMR LLC CIK 315066 · View history | $1.56B 5,840,124 shares | 0.10% | +21.25K(+0.40%)Added | SEC filing ↗ May 12, 2025 | ▾ |
| 02 | BlackRock, Inc. CIK 2012383 · View history | $1.11B 4,134,048 shares | 0.02% | +24.66K(+0.60%)Added | SEC filing ↗ May 2, 2025 | ▾ |
| 03 | VANGUARD GROUP INC CIK 102909 · View history | $982.83M 3,675,349 shares | 0.02% | +24.73K(+0.70%)Added | SEC filing ↗ May 9, 2025 | ▾ |
| 04 | PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history | $323.15M 1,208,431 shares | 0.04% | -57.26K(-4.50%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 05 | STATE STREET CORP CIK 93751 · View history | $320.27M 1,197,662 shares | 0.01% | -5.56K(-0.50%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 06 | Champlain Investment Partners, LLC CIK 1315478 · View history | $232.63M 869,923 shares | 1.68% | -626.03K(-41.80%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 07 | RTW INVESTMENTS, LP CIK 1493215 · View history | $230.71M 862,770 shares | 3.53% | +320(0.00%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 08 | CITADEL ADVISORS LLC CIK 1423053 · View history | $209.73M 784,309 shares | 0.21% | +50.02K(+6.80%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 09 | JPMORGAN CHASE & CO CIK 19617 · View history | $188.16M 703,634 shares | 0.01% | +572.61K(+437.00%)Added | SEC filing ↗ May 12, 2025 | ▾ |
| 10 | BAILLIE GIFFORD & CO CIK 1088875 · View history | $184.24M 688,995 shares | 0.16% | -41.24K(-5.60%)Reduced | SEC filing ↗ May 7, 2025 | ▾ |
| 11 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $184.20M 688,632 shares | 0.01% | +37.66K(+5.80%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 12 | T. Rowe Price Investment Management, Inc. CIK 1897612 · View history | $169.43M 633,608 shares | 0.11% | -73.45K(-10.40%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 13 | Clearbridge Investments, LLC CIK 1348883 · View history | $156.93M 586,840 shares | 0.14% | -77.11K(-11.60%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 14 | CONGRESS ASSET MANAGEMENT CO /MA CIK 897378 · View history | $146.08M 546,281 shares | 1.09% | -62.68K(-10.30%)Reduced | SEC filing ↗ Apr 11, 2025 | ▾ |
| 15 | Capital World Investors CIK 1422849 · View history | $145.42M 543,825 shares | 0.02% | 0(0.00%)Unchanged | SEC filing ↗ May 12, 2025 | ▾ |
| 16 | JANUS HENDERSON GROUP PLC CIK 1274173 · View history | $144.83M 541,317 shares | 0.08% | -55.76K(-9.30%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 17 | NORGES BANK CIK 1374170 · Amended · View history | $114.36M 427,663 shares | 0.02% | +198.61K(+86.70%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 18 | Holocene Advisors, LP CIK 1700574 · View history | $107.59M 402,336 shares | 0.32% | +392.23K(+3,881.90%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 19 | MORGAN STANLEY CIK 895421 · View history | $99.66M 372,668 shares | 0.01% | -66.04K(-15.10%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 20 | Thrivent Financial for Lutherans CIK 314984 · Amended · View history | $95.57M 357,381 shares | 0.21% | -10.28K(-2.80%)Reduced | SEC filing ↗ Aug 26, 2025 | ▾ |
Showing 20 / 424 institutions. The complete set is available through the API.
Coverage & totals by quarter
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.
Explore all 424 reporting institutions.
This page includes 20 of 424 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
＋ 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 424 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":"2025Q1","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.