Mariner
CSTM icon

Mariner’s Constellium CSTM Stock Holding History

Mariner’s Portfolio CSTM Stock Details CSTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.49M Buy
101,463
+32,669
+47% +$777K ﹤0.01% 1418
2025
Q4 		$1.3M Buy
68,794
+36,198
+111% +$601K ﹤0.01% 1763
2025
Q3 		$485K Buy
+32,596
New +$466K ﹤0.01% 2455
2025
Q1 		– Sell
-10,454
Closed -$107K – 3472
2024
Q4 		$107K Buy
+10,454
New +$129K ﹤0.01% 3163
2023
Q3 		– Sell
-11,142
Closed -$192K – 2923
2023
Q2 		$192K Buy
+11,142
New +$171K ﹤0.01% 2482

Other funds holding CSTM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
B
Bpifrance Maisons Alfort, Cedex, France $1.65B AUM 19.85% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Mariner's CSTM Position: Q1 2026 in Review

Mariner increased its Constellium (CSTM) stake by 47% in Q1 2026, buying an estimated $777K and bringing the position to 101,463 shares worth $2.49M. The position accounts for ﹤0.01% of the portfolio, ranked #1418.

Mariner first reported a position in CSTM in Q2 2023 and has held it in 5 quarters since. 313 funds tracked by Wall St. Rank hold CSTM as of Q1 2026.

  • Mariner held 101,463 shares of Constellium worth $2.49M as of Q1 2026.
  • Mariner bought 32,669 Constellium shares in Q1 2026, an estimated $777K.
  • Constellium made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #1418 holding.
  • Mariner first reported a position in Constellium in Q2 2023 and has held it in 5 quarters since.
  • 313 funds tracked by Wall St. Rank held Constellium as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.