Position in CSTM
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$45,399,260
+$10,677,560 QoQ
Shares Held
1,847,000
+0.3% QoQ
Ownership
1.36%
of shares outstanding
% of Portfolio
13.43%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2023
11 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CSTM Over Time
Shares Held
Position Value (USD)
Position in Aluminum
Basic Materials · as of Mar 31, 2026BRIGHTLINE CAPITAL MANAGEMENT, LLC holds $66,488,510 across 2 Aluminum names. CSTM ranks #1 (68.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CSTM |
Constellium SE
This page
|
1,847,000 | $45,399,260 | |
| 2 | KALU |
Kaiser Aluminum Corp
|
175,000 | $21,089,250 |
All Filings in CSTM
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11 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $45,399,260 | 1,847,000 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $34,721,700 | 1,842,000 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $24,180,000 | 1,625,000 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $13,300,000 | 1,000,000 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $7,517,050 | 745,000 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $7,301,970 | 711,000 | Shares | Sole | 2025-02-13 | |
| 2024-09-30 | $11,577,120 | 712,000 | Shares | Sole | 2024-11-13 | |
| 2024-06-30 | $13,402,350 | 711,000 | Shares | Sole | 2024-08-13 | |
| 2024-03-31 | $14,150,400 | 640,000 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $9,620,720 | 482,000 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $8,772,400 | 482,000 | Shares | Sole | 2023-10-31 | |
| No filing history on record for this holder in this stock. | ||||||