PEN
Penumbra, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth -8.3% ·
share flow +4.3% ·
net new positions -13.6%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | 0 | 4.65K | $1.48M | n/a | n/a |
| Q2 2026 | 116 | -12 | 22.38M | $7.07B | +3 | −14 |
| 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) ✦ | 5.89M | +0.6% | $1.49B | 0.1% | ▲ Add | 2 | SEC ↗ ×7 |
| 2 | BlackRock ✦ (passive) | 4.17M | -1.0% | $1.06B | 0.0% | ▼ Trim | 2 | SEC ↗ ×18 |
| 3 | The Vanguard Group ✦ (passive) | 3.84M | -0.7% | $971.60M | 0.0% | ▼ Trim | 2 | SEC ↗ ×6 |
| 4 | T. Rowe Price ✦ | 1.79M | +30.6% | $454.52M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 5 | JPMorgan Chase ✦ | 1.69M | n/a | $427.45M | 0.0% | n/c | 1 | SEC ↗ ×20 |
| 6 | State Street Global Advisors ✦ (passive) | 1.16M | -0.5% | $295.11M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 971.00K | +343.4% | $245.97M | 0.2% | ▲ Add | 6 | SEC ↗ |
| 8 | Baillie Gifford ✦ | 908.55K | -1.5% | $230.15M | 0.2% | ▼ Trim | 6 | SEC ↗ ×4 |
| 9 | Geode Capital Management ✦ (passive) | 747.77K | +5.9% | $189.46M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 10 | Morgan Stanley ✦ | 693.45K | n/a | $175.67M | 0.0% | n/c | 1 | SEC ↗ ×13 |
| 11 | Capital World Investors ✦ | 415.73K | -23.8% | $105.31M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 12 | Goldman Sachs Group ✦ | 288.41K | n/a | $73.06M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 13 | AQR Capital Management ✦ | 234.46K | -29.2% | $59.39M | 0.0% | ▼ Trim | 6 | SEC ↗ ×4 |
| 14 | Millennium Management ✦ | 233.31K | +242.1% | $59.10M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 15 | Adage Capital Partners ✦ | 137.79K | +25.8% | $34.90M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 16 | Arrowstreet Capital ✦ | 122.41K | +211.0% | $31.01M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | PRIMECAP Management ✦ | 27.37K | -0.2% | $6.93M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 18 | Two Sigma Investments ✦ | 18.88K | -45.1% | $4.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 19 | Gotham Asset Management ✦ | 15.12K | -23.9% | $3.83M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 20 | Marshall Wace ✦ | 11.66K | -85.8% | $2.95M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 21 | D. E. Shaw & Co. ✦ | 7.59K | 0.0% | $1.92M | 0.0% | Held | 6 | SEC ↗ ×2 |
| 22 | Bridgewater Associates ✦ | 1.28K | -61.4% | $324,250 | 0.0% | ▼ Trim | 6 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Norges Bank | $114.01M | was 0.0% |
| Point72 Asset Management | $35.94M | was 0.1% |
| Renaissance Technologies | $3.36M | was 0.0% |
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.