ACLX
Arcellx, Inc. · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth +18.2% ·
share flow +5.2% ·
net new positions +15.4%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q1 2026 | 79 | -11 | 20.14M | $2.28B | +11 | −23 |
| Q4 2025 | 90 | +2 | 26.91M | $1.75B | +4 | −1 |
| Q3 2025 | 15 | -1 | 21.54M | $1.77B | — | −2 |
| Q2 2025 | 14 | -2 | 18.84M | $1.24B | — | −2 |
| Q1 2025 | 13 | 0 | 6.16M | $404.16M | +1 | −1 |
| Q4 2024 | 13 | +2 | 5.38M | $412.92M | +4 | −2 |
| Q3 2024 | 10 | +1 | 3.34M | $279.00M | +2 | −1 |
| Q2 2024 | 9 | — | 3.07M | $169.41M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | T. Rowe Price ✦ | 2.12M | +11.6% | $162.69M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 2 | T. Rowe Price ✦ | 2.12M | +11.6% | $162.69M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 3 | State Street Global Advisors ✦ (passive) | 1.78M | — | $136.15M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 979.03K | +0.4% | $75.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 979.03K | +0.4% | $75.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | Capital World Investors ✦ | 252.88K | New | $19.39M | 0.0% | New | 1 | SEC ↗ |
| 7 | Duquesne Family Office ✦ | 74.10K | 0.0% | $5.68M | 0.2% | Held | 3 | SEC ↗ |
| 8 | Renaissance Technologies ✦ | 49.10K | New | $3.77M | 0.0% | New | 1 | SEC ↗ |
| 9 | Norges Bank ✦ (passive) | 27.25K | New | $2.09M | 0.0% | New | 1 | SEC ↗ |
| 10 | Citadel Advisors ✦ | 25.23K | +47.6% | $1.93M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | Millennium Management ✦ | 22.37K | New | $1.72M | 0.0% | New | 1 | SEC ↗ |
| 12 | AQR Capital Management ✦ | 20.25K | +22.4% | $1.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 20.25K | +22.4% | $1.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 20.25K | +22.4% | $1.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | Wellington Management ✦ | 19.69K | -6.1% | $1.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 16 | Wellington Management ✦ | 19.69K | -6.1% | $1.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 17 | Wellington Management ✦ | 19.69K | -6.1% | $1.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | Wellington Management ✦ | 19.69K | -6.1% | $1.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | Gotham Asset Management ✦ | 10.51K | -19.2% | $805,859 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | Two Sigma Investments ✦ | 6.90K | -72.5% | $529,161 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Capital World Investors | $19.39M | 0.0% |
| Renaissance Technologies | $3.77M | 0.0% |
| Norges Bank | $2.09M | 0.0% |
| Millennium Management | $1.72M | 0.0% |
Exited
| Adage Capital Partners | $24.39M | was 0.0% |
| D. E. Shaw & Co. | $526,531 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 236 holders, 55.96M shares, $5.94B 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.