Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in PEN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.3M | $1.42B | +4.6% | 11.010% | 0.02% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $556.4M | β | 4.308% | 0.01% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.7M | $543.3M | β | 4.207% | 0.03% |
| 4 | HBK INVESTMENTS L P | 1.6M | $536.6M | β | 4.155% | 6.98% |
| 5 | STATE STREET CORP | 1.2M | $389.4M | +2.5% | 3.015% | 0.01% |
| 6 | MILLENNIUM MANAGEMENT LLC | 1.1M | $376.4M | β | 2.914% | 0.25% |
| 7 | BAILLIE GIFFORD & CO | 840K | $276.0M | -4.1% | 2.137% | 0.28% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 795K | $261.3M | +3.8% | 2.022% | 0.02% |
| 9 | BALYASNY ASSET MANAGEMENT LLC | 762K | $250.2M | +370.7% | 1.938% | 0.86% |
| 10 | GOLDMAN SACHS GROUP INC | 721K | $236.6M | +126.5% | 1.832% | 0.03% |
| 11 | CITIGROUP INC | 621K | $203.9M | +1203.1% | 1.579% | 0.09% |
| 12 | UBS Group AG | 560K | $184.0M | +272.6% | 1.425% | 0.03% |
| 13 | Invesco Ltd. | 538K | $176.7M | -15.7% | 1.368% | 0.03% |
| 14 | FMR LLC | 496K | $162.9M | -90.3% | 1.261% | 0.01% |
| 15 | Champlain Investment Partners, LLC | 491K | $161.4M | -18.4% | 1.249% | 2.05% |
| 16 | ExodusPoint Capital Management, LP | 465K | $152.8M | +2038.9% | 1.183% | 1.46% |
| 17 | Capital World Investors | 451K | $148.0M | +5.7% | 1.146% | 0.02% |
| 18 | WHITEBOX ADVISORS LLC | 445K | $146.1M | β | 1.131% | 2.13% |
| 19 | CNH PARTNERS LLC | 423K | $138.9M | β | 1.076% | 2.28% |
| 20 | TUDOR INVESTMENT CORP ET AL | 411K | $135.0M | β | 1.045% | 0.47% |
| 21 | MORGAN STANLEY | 401K | $131.8M | -23.6% | 1.020% | 0.01% |
| 22 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 400K | $131.4M | +130.2% | 1.017% | 0.07% |
| 23 | Hudson Bay Capital Management LP | 349K | $114.6M | β | 0.887% | 1.23% |
| 24 | Amundi | 346K | $113.5M | +302.9% | 0.879% | 0.03% |
| 25 | DIMENSIONAL FUND ADVISORS LP | 326K | $107.0M | +0.3% | 0.829% | 0.02% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in PEN β a direct measure of their conviction.
Filings activity in PEN during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new PEN position in Q1 2026
Institutions that fully closed their PEN position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 474 | +11% | 86.55% | +3.79 pp | $10.85B | +4.6% |
| Q4 2025 | 428 | +5.7% | 82.76% | +15.03 pp | $10.37B | +22% |
| Q3 2025 | 405 | 8.2% | 67.73% | +0.10 pp | $8.49B | +0.2% |
| Q2 2025 | 441 | +8.4% | 67.63% | +2.50 pp | $8.48B | +3.8% |
| Q1 2025 | 407 | +12% | 65.13% | +5.98 pp | $8.16B | +10% |
| Q4 2024 | 364 | +14% | 59.15% | +10.77 pp | $7.41B | +22% |
| Q3 2024 | 319 | 4.8% | 48.38% | +3.31 pp | $6.06B | +7.3% |
| Q2 2024 | 335 | β | 45.07% | β | $5.65B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying PEN stock.
Based on Q1 2026 13F filings, institutional ownership of Penumbra, Inc. stands at 86.6%, held across 474 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of PEN, with approximately 4,330,456 shares worth $1.42B as of Q1 2026.
Yes β 1 widely-followed marquee investor appear among the top 25 institutional holders of PEN, including MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for PEN is 66 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
134 institutions opened new positions in PEN during Q1 2026, while 88 fully exited. 218 added to existing positions and 118 trimmed.
PEN institutional ownership rose by 3.79 percentage points quarter-over-quarter, with a net change of +46 holders.
The top 10 institutions account for 44.7% of all reported 13F value in PEN, and the top 25 account for 65.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Penumbra, Inc. (PEN) Institutional Ownership