Constellium
CSTM
253 hedge funds and large institutions have $2.34B invested in Constellium in 2025 Q4 according to their latest regulatory filings, with 42 funds opening new positions, 86 increasing their positions, 94 reducing their positions, and 21 closing their positions.
477% more call options, than puts
Call options by funds: $8.27M | Put options by funds: $1.43M
100% more first-time investments, than exits
New positions opened: 42 | Existing positions closed: 21
23% more capital invested
Capital invested by funds: $1.91B → $2.34B (+$431M)
11% more funds holding in top 10
Funds holding in top 10: 9 → 10 (+1)
7% more funds holding
Funds holding: 237 → 253 (+16)
9% less repeat investments, than reductions
Existing positions increased: 86 | Existing positions reduced: 94
1.89% less ownership
Funds ownership: 92.09% → 90.2% (-1.9%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
+$20.2M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$12.5M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
+$10.6M |
| 4 |
D.E. Shaw & Co
New York
|
+$10M |
| 5 |
BGDI
BW Gestao de Investimentos
Sao Paulo,
Brazil
|
+$9.07M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$48.9M |
| 2 |
NTCM
Nut Tree Capital Management
New York
|
-$33M |
| 3 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$30.3M |
| 4 |
Janus Henderson Group
London,
|
-$29.2M |
| 5 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$13M |
CSTM Hedge Fund Activity: Q4 2025 in Review
253 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Constellium (CSTM) for Q4 2025, worth a combined $2.34B — up 23% from $1.91B a quarter earlier.
Buyers outnumbered sellers: 42 funds opened new CSTM positions and 21 closed out — a net gain of 21 holders — while 86 added to existing stakes and 94 trimmed.
The largest buyer was Morgan Stanley, adding an estimated $20.2M. The largest seller was Fidelity Investments, cutting an estimated $48.9M.
- 253 institutional investors held Constellium (CSTM) as of Q4 2025, up from 237 in Q3 2025.
- Funds reported $2.34B of Constellium stock for Q4 2025, up 23% quarter-over-quarter.
- 42 funds opened new Constellium positions in Q4 2025 and 21 closed out, a net change of +21 holders.
- The largest Constellium buyer in Q4 2025 was Morgan Stanley, an estimated $20.2M added.
- The largest Constellium seller in Q4 2025 was Fidelity Investments, an estimated $48.9M sold.
Based on aggregated 13F filings for Q4 2025.