Century Aluminum
CENX
221 hedge funds and large institutions have $1.72B invested in Century Aluminum in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 88 increasing their positions, 72 reducing their positions, and 37 closing their positions.
73% more call options, than puts
Call options by funds: $61.4M | Put options by funds: $35.5M
22% more repeat investments, than reductions
Existing positions increased: 88 | Existing positions reduced: 72
16% more first-time investments, than exits
New positions opened: 43 | Existing positions closed: 37
2.22% more ownership
Funds ownership: 100.13% → 102.35% (+2.2%)
1% more funds holding
Funds holding: 218 → 221 (+3)
0% more capital invested
Capital invested by funds: $1.72B → $1.72B (+$5.6M)
20% less funds holding in top 10
Funds holding in top 10: 5 → 4 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Boston Partners
Boston,
Massachusetts
|
+$22.7M |
| 2 |
SG
Sourcerock Group
Denver,
Colorado
|
+$20.8M |
| 3 |
Marshall Wace
London,
United Kingdom
|
+$8.86M |
| 4 |
Millennium Management
New York
|
+$8.13M |
| 5 |
State Street
Boston,
Massachusetts
|
+$7.24M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PP
Pertento Partners
London,
United Kingdom
|
-$13.6M |
| 2 |
N
Nuveen
Charlotte,
North Carolina
|
-$11.5M |
| 3 |
ECA
Encompass Capital Advisors
New York
|
-$11M |
| 4 |
PCM
Penn Capital Management
Philadelphia,
Pennsylvania
|
-$9.63M |
| 5 |
Invesco
Atlanta,
Georgia
|
-$6.76M |
CENX Hedge Fund Activity: Q2 2025 in Review
221 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in Century Aluminum (CENX) for Q2 2025, worth a combined $1.72B — up 0.33% from $1.72B a quarter earlier.
Buyers outnumbered sellers: 43 funds opened new CENX positions and 37 closed out — a net gain of 6 holders — while 88 added to existing stakes and 72 trimmed.
The largest buyer was Boston Partners, adding an estimated $22.7M. The largest seller was Pertento Partners, exiting entirely with an estimated $13.6M sold.
- 221 institutional investors held Century Aluminum (CENX) as of Q2 2025, up from 218 in Q1 2025.
- Funds reported $1.72B of Century Aluminum stock for Q2 2025, up 0.33% quarter-over-quarter.
- 43 funds opened new Century Aluminum positions in Q2 2025 and 37 closed out, a net change of +6 holders.
- The largest Century Aluminum buyer in Q2 2025 was Boston Partners, an estimated $22.7M added.
- The largest Century Aluminum seller in Q2 2025 was Pertento Partners, an estimated $13.6M sold.
Based on aggregated 13F filings for Q2 2025.