PEN
Penumbra, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +14.3% ·
share flow -3.5% ·
net new positions +12.5%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| 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 | — |
| Q3 2025 | 22 | -2 | 23.38M | $5.92B | — | −3 |
| Q2 2025 | 22 | +3 | 20.19M | $5.18B | +3 | — |
| Q1 2025 | 16 | 0 | 6.15M | $1.64B | +1 | −1 |
| Q4 2024 | 16 | +2 | 5.72M | $1.36B | +2 | — |
| Q3 2024 | 13 | -1 | 4.72M | $917.01M | — | −1 |
| Q2 2024 | 14 | — | 5.82M | $1.05B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | T. Rowe Price ✦ | 1.27M | -36.2% | $300.58M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 2 | T. Rowe Price ✦ | 1.27M | -36.2% | $300.58M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 3 | State Street Global Advisors ✦ (passive) | 1.20M | — | $285.74M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 734.29K | +78.2% | $174.38M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 5 | Baillie Gifford ✦ | 730.23K | +23.4% | $173.42M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 6 | Baillie Gifford ✦ | 730.23K | +23.4% | $173.42M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 7 | Baillie Gifford ✦ | 730.23K | +23.4% | $173.42M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 8 | Baillie Gifford ✦ | 730.23K | +23.4% | $173.42M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 9 | Geode Capital Management ✦ (passive) | 650.97K | -0.7% | $154.64M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 10 | Geode Capital Management ✦ (passive) | 650.97K | -0.7% | $154.64M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 11 | Capital World Investors ✦ | 543.83K | 0.0% | $129.15M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | Norges Bank ✦ (passive) | 229.05K | -7.5% | $54.40M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 159.44K | +19.6% | $37.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 159.44K | +19.6% | $37.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 159.44K | +19.6% | $37.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 159.44K | +19.6% | $37.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | Adage Capital Partners ✦ | 100.50K | New | $23.87M | 0.0% | New | 1 | SEC ↗ |
| 18 | Marshall Wace ✦ | 43.95K | +2312.3% | $10.44M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 19 | PRIMECAP Management ✦ | 30.73K | -21.8% | $7.30M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | Renaissance Technologies ✦ | 8.10K | -91.0% | $1.92M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 21 | D. E. Shaw & Co. ✦ | 6.82K | -20.9% | $1.62M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | D. E. Shaw & Co. ✦ | 6.82K | -20.9% | $1.62M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 23 | Bridgewater Associates ✦ | 3.99K | -31.1% | $947,545 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 24 | Millennium Management ✦ | 3.34K | -36.5% | $792,233 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | Gotham Asset Management ✦ | 1.16K | New | $274,764 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Adage Capital Partners | $23.87M | 0.0% |
| Gotham Asset Management | $274,764 | 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.