Institutional Manager · CIK 0001432450
BRIGHTLINE CAPITAL MANAGEMENT, LLC
Miami, FL · File #028-14718
Latest AUM
$247.4M
Positions
8
Top-10 Concentration
100.0%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | SOLARIS ENERGY INFRAS INC | SEI | -753,000 | -$34.6M | +$6.0M |
| EXITED | EOS ENERGY ENTERPRISES INC | 29415C101 | -1,754,000 | -$20.0M | $0 |
| NEW | ECOVYST INC | ECVT | +2,050,000 | +$19.9M | $0 |
| NEW | KAISER ALUMINUM CORP | KALU | +168,000 | +$19.3M | $0 |
| EXITED | ENVIRI CORP | 415864107 | -1,400,000 | -$17.8M | $0 |
| EXITED | MAGNERA CORP | 55939A107 | -560,000 | -$6.6M | $0 |
| ADD | AMENTUM HOLDINGS INC | AMTM | +192,000 | +$5.6M | +$6.1M |
| ADD | CONSTELLIUM SE | CSTM | +217,000 | +$4.1M | +$6.5M |
| EXITED | TRINSEO PLC | G9059U107 | -1,060,000 | -$2.5M | $0 |
| ADD | VIASAT INC | VSAT | +58,000 | +$2.0M | +$10.5M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20258 pos · $247.4M
- 13F HOLDINGS REPORTQ/E Sep 202510 pos · $244.0M
- 13F HOLDINGS REPORTQ/E Jun 202515 pos · $232.2M
- 13F HOLDINGS REPORTQ/E Mar 202512 pos · $115.3M
- 13F HOLDINGS REPORTQ/E Dec 202413 pos · $145.8M
- 13F HOLDINGS REPORTQ/E Sep 202420 pos · $236.8M
- 13F HOLDINGS REPORTQ/E Jun 202419 pos · $201.5M
- 13F HOLDINGS REPORTQ/E Mar 202415 pos · $166.2M
- 13F HOLDINGS REPORTQ/E Dec 20234 pos · $24.4M
Top 8 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | VIASAT INC | VSAT | 2,094,000 | $72.2M | 29.17% |
| 2 | AMENTUM HOLDINGS INC | AMTM | 1,392,000 | $40.4M | 16.32% |
| 3 | CONSTELLIUM SE | CSTM | 1,842,000 | $34.7M | 14.04% |
| 4 | DANA INC | DAN | 1,146,000 | $27.2M | 11.01% |
| 5 | FLUOR CORP NEW | FLR | 559,000 | $22.2M | 8.96% |
| 6 | ECOVYST INC | ECVT | 2,050,000 | $19.9M | 8.06% |
| 7 | KAISER ALUMINUM CORP | KALU | 168,000 | $19.3M | 7.80% |
| 8 | SOLARIS ENERGY INFRAS INC | SEI | 250,000 | $11.5M | 4.65% |