Security record · archived quarter
CENX
Century Aluminum Company · Basic Materials · Aluminum
17Tracked holders
+1Δ holders
26.82MShares held
$483.25MReported value
+3New positions
−2Exits
Momentum inputs (comparable managers):
holder breadth +6.2% ·
share flow +6.4% ·
net new positions +5.9%
— formula
Broad accumulation — rising shares across more 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 |
|---|---|---|---|---|---|---|
| Q2 2026 | 111 | +6 | 53.91M | $2.48B | +13 | −7 |
| Q1 2026 | 108 | +3 | 48.84M | $2.86B | +8 | −5 |
| Q4 2025 | 104 | +2 | 46.68M | $1.83B | +3 | −1 |
| Q3 2025 | 18 | -2 | 28.46M | $835.48M | — | −2 |
| Q2 2025 | 17 | +1 | 26.82M | $483.25M | +3 | −2 |
| Q1 2025 | 13 | -2 | 9.28M | $172.16M | +1 | −3 |
| Q4 2024 | 15 | -1 | 9.15M | $166.76M | +1 | −2 |
| Q3 2024 | 15 | +1 | 4.94M | $80.16M | +2 | −1 |
| Q2 2024 | 14 | — | 5.53M | $92.60M | — | — |
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 10.16M | — | $183.07M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | The Vanguard Group ✦ (passive) | 5.77M | — | $103.97M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 5.77M | — | $103.97M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | The Vanguard Group ✦ (passive) | 5.77M | — | $103.97M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 5.77M | — | $103.97M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | The Vanguard Group ✦ (passive) | 5.77M | — | $103.97M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | State Street Global Advisors ✦ (passive) | 3.67M | +13.2% | $66.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 21 | Citadel Advisors ✦ | 1.92M | -3.2% | $34.65M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 22 | Citadel Advisors ✦ | 1.92M | -3.2% | $34.65M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 23 | Geode Capital Management ✦ (passive) | 1.30M | +0.5% | $23.44M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 24 | Geode Capital Management ✦ (passive) | 1.30M | +0.5% | $23.44M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 25 | Fisher Asset Management ✦ | 1.06M | -19.6% | $19.17M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 26 | Wellington Management ✦ | 981.60K | +41.5% | $17.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 27 | Wellington Management ✦ | 981.60K | +41.5% | $17.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 28 | Wellington Management ✦ | 981.60K | +41.5% | $17.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | Wellington Management ✦ | 981.60K | +41.5% | $17.69M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 30 | Marshall Wace ✦ | 521.61K | New | $9.40M | 0.0% | New | 1 | SEC ↗ |
| 31 | Marshall Wace ✦ | 521.61K | New | $9.40M | 0.0% | New | 1 | SEC ↗ |
| 32 | Millennium Management ✦ | 512.52K | +1416.3% | $9.24M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 33 | Adage Capital Partners ✦ | 290.00K | +13.7% | $5.23M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | D. E. Shaw & Co. ✦ | 268.67K | +846.7% | $4.84M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 35 | D. E. Shaw & Co. ✦ | 268.67K | +846.7% | $4.84M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 36 | Renaissance Technologies ✦ | 155.60K | New | $2.80M | 0.0% | New | 1 | SEC ↗ |
| 37 | Two Sigma Investments ✦ | 81.78K | -57.5% | $1.47M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 38 | AQR Capital Management ✦ | 54.67K | +40.2% | $985,099 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 39 | AQR Capital Management ✦ | 54.67K | +40.2% | $985,099 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 40 | AQR Capital Management ✦ | 54.67K | +40.2% | $985,099 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 41 | AQR Capital Management ✦ | 54.67K | +40.2% | $985,099 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 42 | T. Rowe Price ✦ | 46.51K | +4.4% | $839,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 43 | Gotham Asset Management ✦ | 16.65K | New | $299,979 | 0.0% | New | 1 | SEC ↗ |
| 44 | Fidelity (FMR) ✦ | 5.80K | — | $104,595 | 0.0% | n/c | 1 | SEC ↗ |
| 45 | Fidelity (FMR) ✦ | 5.80K | — | $104,595 | 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
| Marshall Wace | $9.40M | 0.0% |
| Marshall Wace | $9.40M | 0.0% |
| Renaissance Technologies | $2.80M | 0.0% |
| Gotham Asset Management | $299,979 | 0.0% |
Exited
| Bridgewater Associates | $1.36M | was 0.0% |
| Norges Bank | $1.32M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 378 holders, 99.93M shares, $5.79B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
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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