SEC 13F Intelligence

Brightline Capital Management, LLC / CSTM

Brightline Capital Management, LLC’s Constellium SE Position

Does Brightline Capital Management, LLC own Constellium SE (CSTM)? Yes — 1.85M shares worth $45M (+13.43% of its 13F portfolio) as of Q1 2026, up from 1.84M shares the prior filed quarter.

Position Value
$45M
Q1 2026
Shares
1.85M
% of Portfolio
+13.43%
Quarters Held
11
currently held

Position History CSTM

Reported value by quarter
Q3 ’23: $9MQ3 ’23Q4 ’23: $10MQ1 ’24: $14MQ1 ’24Q2 ’24: $13MQ3 ’24: $12MQ3 ’24Q4 ’24: $7MQ1 ’25: $8MQ1 ’25Q2 ’25: $13MQ3 ’25: $24MQ3 ’25Q4 ’25: $35MQ1 ’26: $45MQ1 ’26filingsflow.com
QuarterSharesValue% of Portfolio
Q1 20261.85M$45M+13.43%
Q4 20251.84M$35M+14.04%
Q3 20251.63M$24M+9.91%
Q2 20251.00M$13M+5.73%
Q1 2025745.0K$8M+6.52%
Q4 2024711.0K$7M+5.01%
Q3 2024712.0K$12M+4.89%
Q2 2024711.0K$13M+6.65%
Q1 2024640.0K$14M+8.51%
Q4 2023482.0K$10M+10.44%
Q3 2023482.0K$9M+35.93%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Brightline Capital Management, LLC’s full portfolio or all institutional holders of CSTM.