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
Q2 		$4.4M Buy
138,055
+36,592
+36% +$1.18M ﹤0.01% 1093
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 $6.73T AUM 46.02% 1-Year Est. Return
B
Bpifrance Maisons Alfort, Cedex, France $1.36B AUM 21.86% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
KPM
Kinetic Partners Management Miami, Florida $4.19B AUM 61.52% 1-Year Est. Return

Mariner's CSTM Position: Q2 2026 in Review

Mariner increased its Constellium (CSTM) stake by 36% in Q2 2026, buying an estimated $1.18M and bringing the position to 138,055 shares worth $4.4M. The position accounts for ﹤0.01% of the portfolio, ranked #1093.

Mariner first reported a position in CSTM in Q2 2023 and has held it in 6 quarters since. 389 funds tracked by Wall St. Rank hold CSTM as of Q2 2026.

  • Mariner held 138,055 shares of Constellium worth $4.4M as of Q2 2026.
  • Mariner bought 36,592 Constellium shares in Q2 2026, an estimated $1.18M.
  • Constellium made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #1093 holding.
  • Mariner first reported a position in Constellium in Q2 2023 and has held it in 6 quarters since.
  • 389 funds tracked by Wall St. Rank held Constellium as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.