Ranked by reported Q2 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 | $1.36B | -0.8% | 10.927% | 0.02% |
| 2 | HBK INVESTMENTS L P | 1.8M | $580.5M | +12.5% | 4.674% | 2.83% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $539.9M | +0.9% | 4.347% | 0.01% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.7M | $526.4M | +0.8% | 4.239% | 0.02% |
| 5 | STATE STREET CORP | 1.2M | $392.6M | +4.8% | 3.161% | 0.01% |
| 6 | ExodusPoint Capital Management, LP | 1.1M | $344.3M | +134.4% | 2.772% | 2.22% |
| 7 | BALYASNY ASSET MANAGEMENT L.P. | 1.1M | $344.2M | +43.0% | 2.772% | 0.43% |
| 8 | JPMORGAN CHASE & CO | 1.1M | $338.6M | +166.1% | 2.724% | 0.02% |
| 9 | MILLENNIUM MANAGEMENT LLC | 948K | $299.2M | -17.3% | 2.409% | 0.11% |
| 10 | GOLDMAN SACHS GROUP INC | 857K | $270.5M | +18.9% | 2.178% | 0.02% |
| 11 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 835K | $263.6M | +108.6% | 2.123% | 0.12% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 796K | $251.5M | +0.1% | 2.025% | 0.01% |
| 13 | NORGES BANK | 752K | $237.5M | — | 1.913% | 0.02% |
| 14 | UBS Group AG | 704K | $222.2M | +25.6% | 1.790% | 0.03% |
| 15 | MORGAN STANLEY | 592K | $186.9M | +47.5% | 1.505% | 0.01% |
| 16 | AQR Arbitrage LLC | 564K | $178.0M | +33.3% | 1.434% | 2.54% |
| 17 | WHITEBOX ADVISORS LLC | 507K | $160.0M | +13.9% | 1.289% | 2.09% |
| 18 | CITADEL ADVISORS LLC | 502K | $158.4M | +98.5% | 1.276% | 0.01% |
| 19 | Capital World Investors | 480K | $151.5M | +6.4% | 1.220% | 0.02% |
| 20 | Neuberger Berman Group LLC | 439K | $138.5M | +44.4% | 1.115% | 0.05% |
| 21 | CITIGROUP INC | 433K | $136.8M | -30.3% | 1.101% | 0.05% |
| 22 | TWO SIGMA INVESTMENTS, LP | 428K | $135.2M | +635.4% | 1.089% | 0.10% |
| 23 | TUDOR INVESTMENT CORP ET AL | 401K | $126.5M | -2.5% | 1.019% | 0.18% |
| 24 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 344K | $108.5M | +6.6% | 0.874% | 0.01% |
| 25 | NORTHERN TRUST CORP | 333K | $105.2M | +3.8% | 0.847% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in PEN — a direct measure of their conviction.
Filings activity in PEN during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 450 | 6.1% | 88.75% | +1.47 pp | $10.86B | 1.3% |
| Q1 2026 | 479 | +11% | 87.28% | 6.68 pp | $11.01B | +3.5% |
| Q4 2025 | 431 | +4.6% | 93.96% | +0.85 pp | $10.64B | +24% |
| Q3 2025 | 412 | 6.6% | 93.11% | +1.67 pp | $8.56B | +0.9% |
| Q2 2025 | 441 | +8.4% | 91.44% | +4.04 pp | $8.48B | +3.8% |
| Q1 2025 | 407 | +12% | 87.40% | 1.40 pp | $8.16B | +10% |
| Q4 2024 | 364 | +14% | 88.80% | +0.62 pp | $7.41B | +22% |
| Q3 2024 | 319 | — | 88.18% | — | $6.06B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying PEN stock.
Based on Q2 2026 13F filings, institutional ownership of Penumbra, Inc. stands at 88.8%, held across 450 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of PEN, with approximately 4,297,555 shares worth $1.36B as of Q2 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of PEN, including MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for PEN is 58 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
37 institutions opened new positions in PEN during Q2 2026, while 69 fully exited. 113 added to existing positions and 280 trimmed.
PEN institutional ownership rose by 1.47 percentage points quarter-over-quarter, with a net change of -29 holders.
The top 10 institutions account for 46.0% of all reported 13F value in PEN, and the top 25 account for 69.5%.
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