Security record · archived quarter
MTSR
Metsera, Inc. · Healthcare · Biotechnology
9Tracked holders
-2Δ holders
26.20MShares held
$745.32MReported value
+0New positions
−2Exits
Momentum inputs (comparable managers):
holder breadth -18.2% ·
share flow +4.8% ·
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
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2025 | 13 | +1 | 32.25M | $1.69B | +2 | −1 |
| Q2 2025 | 9 | -2 | 26.20M | $745.32M | — | −2 |
| Q1 2025 | 8 | +8 | 6.51M | $177.18M | +8 | — |
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 15.76M | — | $448.32M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Fidelity (FMR) ✦ | 15.76M | — | $448.32M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | Fidelity (FMR) ✦ | 15.76M | — | $448.32M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Wellington Management ✦ | 3.43M | +42.7% | $97.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | Wellington Management ✦ | 3.43M | +42.7% | $97.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | Wellington Management ✦ | 3.43M | +42.7% | $97.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | Wellington Management ✦ | 3.43M | +42.7% | $97.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | Wellington Management ✦ | 3.43M | +42.7% | $97.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | Viking Global Investors ✦ | 1.62M | 0.0% | $45.99M | 0.1% | Held | 2 | SEC ↗ |
| 10 | The Vanguard Group ✦ (passive) | 1.49M | — | $42.43M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | The Vanguard Group ✦ (passive) | 1.49M | — | $42.43M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | The Vanguard Group ✦ (passive) | 1.49M | — | $42.43M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | The Vanguard Group ✦ (passive) | 1.49M | — | $42.43M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | The Vanguard Group ✦ (passive) | 1.49M | — | $42.43M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | T. Rowe Price ✦ | 1.37M | -12.1% | $38.94M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 16 | T. Rowe Price ✦ | 1.37M | -12.1% | $38.94M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 1.24M | — | $35.20M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 1.24M | — | $35.20M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 1.24M | — | $35.20M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 1.24M | — | $35.20M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | BlackRock ✦ (passive) | 1.24M | — | $35.20M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | BlackRock ✦ (passive) | 1.24M | — | $35.20M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | State Street Global Advisors ✦ (passive) | 600.20K | +141.4% | $17.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 24 | Geode Capital Management ✦ (passive) | 466.95K | +7.4% | $13.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Geode Capital Management ✦ (passive) | 466.95K | +7.4% | $13.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 26 | Citadel Advisors ✦ | 230.82K | +376.0% | $6.57M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | Citadel Advisors ✦ | 230.82K | +376.0% | $6.57M | 0.0% | ▲ Add | 2 | 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 | $3.47M | was 0.0% |
| Millennium Management | $2.01M | was 0.0% |
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2025 ·
Methodology ·
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