PHAT
Phathom Pharmaceuticals, Inc. · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth -30.0% ·
share flow +9.3% ·
net new positions -20.0%
— formula
Concentrated accumulation — rising shares among fewer 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 | 70 | +3 | 31.41M | $340.87M | +8 | −5 |
| Q1 2026 | 70 | +3 | 28.31M | $314.61M | +9 | −6 |
| Q4 2025 | 67 | +2 | 22.91M | $380.11M | +2 | — |
| Q3 2025 | 13 | +2 | 15.27M | $179.73M | +2 | — |
| Q2 2025 | 8 | -4 | 10.36M | $99.34M | — | −4 |
| Q1 2025 | 9 | 0 | 3.37M | $21.12M | — | — |
| Q4 2024 | 9 | 0 | 2.95M | $23.99M | +2 | −2 |
| Q3 2024 | 8 | +2 | 2.05M | $37.04M | +3 | −1 |
| Q2 2024 | 6 | — | 1.55M | $15.95M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.32M | — | $31.79M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | The Vanguard Group ✦ (passive) | 2.79M | — | $26.73M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | The Vanguard Group ✦ (passive) | 2.79M | — | $26.73M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | The Vanguard Group ✦ (passive) | 2.79M | — | $26.73M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | Millennium Management ✦ | 2.25M | +330.0% | $21.58M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | Geode Capital Management ✦ (passive) | 1.07M | +5.3% | $10.26M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 14 | Geode Capital Management ✦ (passive) | 1.07M | +5.3% | $10.26M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | State Street Global Advisors ✦ (passive) | 849.42K | -5.8% | $8.15M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 49.92K | -53.5% | $478,771 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 17 | AQR Capital Management ✦ | 49.92K | -53.5% | $478,771 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | AQR Capital Management ✦ | 49.92K | -53.5% | $478,771 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | T. Rowe Price ✦ | 30.10K | +11.4% | $289,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 20 | Fidelity (FMR) ✦ | 5.88K | — | $56,399 | 0.0% | n/c | 1 | 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
| Marshall Wace | $1.97M | was 0.0% |
| Wellington Management | $1.26M | was 0.0% |
| Citadel Advisors | $1.13M | was 0.0% |
| Two Sigma Investments | $610,240 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 173 holders, 68.60M shares, $741.84M 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.