Century Aluminum
CENX
325 hedge funds and large institutions have $3.91B invested in Century Aluminum in 2025 Q4 according to their latest regulatory filings, with 103 funds opening new positions, 107 increasing their positions, 92 reducing their positions, and 28 closing their positions.
268% more first-time investments, than exits
New positions opened: 103 | Existing positions closed: 28
199% more call options, than puts
Call options by funds: $190M | Put options by funds: $63.7M
86% more funds holding in top 10
Funds holding in top 10: 7 → 13 (+6)
38% more capital invested
Capital invested by funds: $2.83B → $3.91B (+$1.08B)
27% more funds holding
Funds holding: 255 → 325 (+70)
16% more repeat investments, than reductions
Existing positions increased: 107 | Existing positions reduced: 92
3.67% more ownership
Funds ownership: 103.35% → 107.02% (+3.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
+$34.2M |
| 2 |
D.E. Shaw & Co
New York
|
+$30.9M |
| 3 |
SG
Sourcerock Group
Denver,
Colorado
|
+$30.7M |
| 4 |
Millennium Management
New York
|
+$30.5M |
| 5 |
UBS Group
Zurich,
Switzerland
|
+$19.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
G
Glencore
Baar,
Switzerland
|
-$127M |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$25.3M |
| 3 |
BlackRock
New York
|
-$20.1M |
| 4 |
Boston Partners
Boston,
Massachusetts
|
-$16.9M |
| 5 |
ECA
Encompass Capital Advisors
New York
|
-$9.73M |
CENX Hedge Fund Activity: Q4 2025 in Review
325 of the 8,266 institutional investors tracked by Wall St. Rank reported a position in Century Aluminum (CENX) for Q4 2025, worth a combined $3.91B — up 38% from $2.83B a quarter earlier.
Buyers outnumbered sellers: 103 funds opened new CENX positions and 28 closed out — a net gain of 75 holders — while 107 added to existing stakes and 92 trimmed.
The largest buyer was Vanguard Group, adding an estimated $34.2M. The largest seller was Glencore, cutting an estimated $127M.
- 325 institutional investors held Century Aluminum (CENX) as of Q4 2025, up from 255 in Q3 2025.
- Funds reported $3.91B of Century Aluminum stock for Q4 2025, up 38% quarter-over-quarter.
- 103 funds opened new Century Aluminum positions in Q4 2025 and 28 closed out, a net change of +75 holders.
- The largest Century Aluminum buyer in Q4 2025 was Vanguard Group, an estimated $34.2M added.
- The largest Century Aluminum seller in Q4 2025 was Glencore, an estimated $127M sold.
Based on aggregated 13F filings for Q4 2025.