Security record
YMAB
name pending profile ingest
13Tracked holders
0Δ holders
7.81MShares held
$35.24MReported value
+1New positions
−1Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -6.2% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
Ownership over time
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 2.75M | — | $12.39M | 0.0% | n/c | 1 | SEC ↗ ×10 |
| 2 | The Vanguard Group ✦ (passive) | 1.94M | — | $8.76M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 3 | Geode Capital Management ✦ (passive) | 848.46K | -0.1% | $3.83M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 4 | State Street Global Advisors ✦ (passive) | 780.14K | -1.1% | $3.52M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 5 | D. E. Shaw & Co. ✦ | 516.86K | -6.0% | $2.33M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 6 | AQR Capital Management ✦ | 252.14K | +53.0% | $1.14M | 0.0% | ▲ Add | 5 | SEC ↗ ×5 |
| 7 | Citadel Advisors ✦ | 207.64K | +34.9% | $936,466 | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 8 | Renaissance Technologies ✦ | 164.10K | -36.1% | $740,091 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 9 | Millennium Management ✦ | 139.96K | -70.0% | $631,197 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 10 | Two Sigma Investments ✦ | 125.30K | -19.1% | $565,094 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 11 | Marshall Wace ✦ | 40.18K | New | $181,216 | 0.0% | New | 1 | SEC ↗ |
| 12 | Fidelity (FMR) ✦ | 30.87K | — | $139,216 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 13 | T. Rowe Price ✦ | 17.21K | 0.0% | $78,000 | 0.0% | Held | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Marshall Wace | $181,216 | 0.0% |
Exited
| Wellington Management | $903,950 | 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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