PEN
Penumbra, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +15.8% ·
share flow +0.5% ·
net new positions +13.6%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 114 | -12 | 22.27M | $7.04B | +3 | −16 |
| Q1 2026 | 130 | +2 | 22.22M | $7.29B | +14 | −13 |
| Q4 2025 | 129 | +2 | 30.57M | $9.51B | +3 | n/a |
| Q3 2025 | 22 | -2 | 23.38M | $5.92B | n/a | −3 |
| Q2 2025 | 22 | +3 | 20.19M | $5.18B | +3 | n/a |
| Q1 2025 | 16 | 0 | 6.15M | $1.64B | +1 | −1 |
| Q4 2024 | 16 | +2 | 5.72M | $1.36B | +2 | n/a |
| Q3 2024 | 13 | -1 | 4.72M | $917.01M | n/a | −1 |
| Q2 2024 | 14 | n/a | 5.82M | $1.05B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 5.86M | n/a | $1.50B | 0.1% | n/c | 1 | SEC ↗ ×7 |
| 2 | BlackRock ✦ (passive) | 4.21M | n/a | $1.08B | 0.0% | n/c | 1 | SEC ↗ ×20 |
| 3 | The Vanguard Group ✦ (passive) | 3.86M | n/a | $990.76M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 4 | T. Rowe Price ✦ | 1.37M | +13.7% | $352.61M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 5 | State Street Global Advisors ✦ (passive) | 1.17M | -2.2% | $300.45M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 6 | Baillie Gifford ✦ | 922.13K | +33.8% | $236.65M | 0.2% | ▲ Add | 5 | SEC ↗ ×4 |
| 7 | Geode Capital Management ✦ (passive) | 706.40K | +2.6% | $181.31M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 8 | Capital World Investors ✦ | 545.19K | +0.2% | $139.91M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | Norges Bank ✦ (passive) | 444.27K | +3.9% | $114.01M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 330.99K | +139.4% | $84.94M | 0.1% | ▲ Add | 5 | SEC ↗ ×4 |
| 11 | Citadel Advisors ✦ | 218.99K | -72.1% | $56.20M | 0.1% | ▼ Trim | 5 | SEC ↗ ×2 |
| 12 | Point72 Asset Management ✦ | 140.04K | -14.3% | $35.94M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 13 | Adage Capital Partners ✦ | 109.50K | +9.5% | $28.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | Marshall Wace ✦ | 82.03K | +340.0% | $21.05M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 15 | Millennium Management ✦ | 68.21K | -54.1% | $17.50M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 16 | Arrowstreet Capital ✦ | 39.36K | New | $10.10M | 0.0% | New | 1 | SEC ↗ |
| 17 | Two Sigma Investments ✦ | 34.40K | New | $8.83M | 0.0% | New | 1 | SEC ↗ |
| 18 | PRIMECAP Management ✦ | 27.42K | -9.9% | $7.04M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 19 | Gotham Asset Management ✦ | 19.86K | +892.9% | $5.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 20 | Renaissance Technologies ✦ | 13.10K | New | $3.36M | 0.0% | New | 1 | SEC ↗ |
| 21 | D. E. Shaw & Co. ✦ | 7.59K | 0.0% | $1.95M | 0.0% | Held | 5 | SEC ↗ ×2 |
| 22 | Bridgewater Associates ✦ | 3.31K | +109.0% | $850,472 | 0.0% | ▲ Add | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $10.10M | 0.0% |
| Two Sigma Investments | $8.83M | 0.0% |
| Renaissance Technologies | $3.36M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 479 holders, 33.44M shares, $10.70B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.