Constellium
CSTM
237 hedge funds and large institutions have $1.91B invested in Constellium in 2025 Q3 according to their latest regulatory filings, with 38 funds opening new positions, 104 increasing their positions, 66 reducing their positions, and 23 closing their positions.
135% more call options, than puts
Call options by funds: $15.9M | Put options by funds: $6.77M
65% more first-time investments, than exits
New positions opened: 38 | Existing positions closed: 23
58% more repeat investments, than reductions
Existing positions increased: 104 | Existing positions reduced: 66
9% more capital invested
Capital invested by funds: $1.76B → $1.91B (+$150M)
6% more funds holding
Funds holding: 224 → 237 (+13)
0% more funds holding in top 10
Funds holding in top 10: 9 → 9 (0)
0.6% less ownership
Funds ownership: 92.69% → 92.09% (-0.6%)
Top Buyers
| 1 |
Millennium Management
New York
|
+$25.9M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$13.4M |
| 3 |
Morgan Stanley
New York
|
+$13M |
| 4 |
AQR Capital Management
Greenwich,
Connecticut
|
+$12.8M |
| 5 |
N
Nuveen
Charlotte,
North Carolina
|
+$10.1M |
Top Sellers
CSTM Hedge Fund Activity: Q3 2025 in Review
237 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Constellium (CSTM) for Q3 2025, worth a combined $1.91B — up 8.5% from $1.76B a quarter earlier.
Buyers outnumbered sellers: 38 funds opened new CSTM positions and 23 closed out — a net gain of 15 holders — while 104 added to existing stakes and 66 trimmed.
The largest buyer was Millennium Management, adding an estimated $25.9M. The largest seller was T. Rowe Price Investment Management, cutting an estimated $132M.
- 237 institutional investors held Constellium (CSTM) as of Q3 2025, up from 224 in Q2 2025.
- Funds reported $1.91B of Constellium stock for Q3 2025, up 8.5% quarter-over-quarter.
- 38 funds opened new Constellium positions in Q3 2025 and 23 closed out, a net change of +15 holders.
- The largest Constellium buyer in Q3 2025 was Millennium Management, an estimated $25.9M added.
- The largest Constellium seller in Q3 2025 was T. Rowe Price Investment Management, an estimated $132M sold.
Based on aggregated 13F filings for Q3 2025.