Managers / Q4 2025 · view latest →
BRIGHTLINE CAPITAL MANAGEMENT, LLC
CIK 0001432450 · 2 S. BISCAYNE BOULEVARD, SUITE 2580, MIAMI, FL, 33131 · 305-423-0834
Summary
Brightline Capital Management, LLC reported $247M in U.S.-listed holdings across 8 positions for Q4 2025.
The portfolio is heavily concentrated: VSAT alone accounts for 29.2% of reported value.
Compared with Q3 2025, the fund opened 2 new positions and exited 4.
Portfolio Metrics
Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.
Reported Value by Quarter
Portfolio Composition
- Common Stock · 86.0% · $213M
- Other · 14.0% · $35M
Quarter-over-Quarter Changes full breakdown →
vs Q3 2025 (amended baseline)
| Issuer | Move | Share Δ | Shares now | Value Δ | Value now |
|---|---|---|---|---|---|
| ECVTECOVYST INC | NEW | +2.05M | 2.05M | +$20M | $20M |
| KALUKAISER ALUMINUM CORP | NEW | +168.0K | 168.0K | +$19M | $19M |
| EOSEEOS ENERGY ENTERPRISES INC | SOLD OUT | −1.75M | 0 | −$20M | $0 |
| HA7ENVIRI CORP | SOLD OUT | −1.40M | 0 | −$18M | $0 |
| MAGNMAGNERA CORP | SOLD OUT | −560.0K | 0 | −$7M | $0 |
| TRINSEO PLC | SOLD OUT | −1.06M | 0 | −$2M | $0 |
| SEISOLARIS ENERGY INFRAS INC | TRIMMED | −753.0K | 250.0K | −$29M | $11M |
| AMTMAMENTUM HOLDINGS INC | ADDED | +192.0K | 1.39M | +$12M | $40M |
Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.
Holdings — Q4 2025
| # | Issuer | Class | % Portfolio | Value ↓ | Shares |
|---|---|---|---|---|---|
| 1 | VSATVIASAT INChistory → | COM | 29.17% | $72M | 2.09M |
| 2 | AMTMAMENTUM HOLDINGS INChistory → | COM | 16.32% | $40M | 1.39M |
| 3 | CONSTELLIUM SE | CL A SHS | 14.04% | $35M | 1.84M |
| 4 | 4DHDANA INChistory → | COM | 11.01% | $27M | 1.15M |
| 5 | FLRFLUOR CORP NEWhistory → | COM | 8.96% | $22M | 559.0K |
| 6 | ECVTECOVYST INChistory → | COM | 8.06% | $20M | 2.05M |
| 7 | KALUKAISER ALUMINUM CORPhistory → | COM PAR $0.01 | 7.80% | $19M | 168.0K |
| 8 | SEISOLARIS ENERGY INFRAS INChistory → | COM CL A | 4.65% | $11M | 250.0K |
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $338M | 9 | May 15, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $247M | 8 | Feb 13, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $244M | 10 | Nov 13, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $232M | 15 | Aug 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $115M | 12 | May 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $146M | 13 | Feb 13, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $237M | 20 | Nov 13, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $201M | 19 | Aug 13, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $166M | 15 | May 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $92M | 10 | Feb 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $24M | 4 | Oct 31, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $9M | 1 | Aug 11, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $0 | 1 | May 5, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $45M | 5 | Feb 3, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $50M | 5 | Nov 9, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $43M | 4 | Aug 3, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $143M | 9 | May 12, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $163M | 13 | Feb 7, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q3 2021 | $140M | 12 | Nov 8, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q2 2021 | $149M | 11 | Aug 9, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | $148M | 13 | May 12, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $132M | 15 | Feb 9, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q3 2020 | Under review | 11 | Nov 10, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q2 2020 | $26.4B | 6 | Aug 4, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $0 | 1 | May 5, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | Under review | 10 | Feb 6, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q3 2019 | Under review | 13 | Nov 12, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q2 2019 | $95M | 11 | Aug 12, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q1 2019 | $63M | 11 | May 9, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q4 2018 | $18M | 2 | Feb 8, 2019 | 13F-HR | changes · EDGAR ↗ |
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.