Brightline Capital Management, LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 13, 2025), Brightline Capital Management, LLC reported 10 stock positions worth $244.0 million. Its top holding was Viasat (VSAT) at 24.4% of the portfolio, followed by Solaris Energy Infrastructur (SEI, 16.4%) and Amentum (AMTM, 11.8%). Compared with Q2 2025, it opened 1 new position, sold out of 6, added to 7 and reduced 1. The biggest buy was Viasat (VSAT, shares +2%) and the biggest sale an exit from Tutor Perini (TPC).
- Most Recent 13F
- Q2 2026
- Location
- Miami, FL
- CIK
- 0001432450
- Portfolio Value
- $244.0M (Q3 2025)
- SEC Filing
- 0000919574-25-006647 ↗ filed Nov 13, 2025
Holdings Value
Holdings 10 stocks · $244.0M
| VSAT Viasat Inc. | 24.45% | 2,036,000 | $59.7M | Add +1.8% |
| SEI Solaris Energy Infrastructur | 16.43% | 1,003,000 | $40.1M | Reduce -10.6% |
| AMTM Amentum Holdings Inc. | 11.78% | 1,200,000 | $28.7M | Add +20.0% |
| CSTM Constellium SE | 9.91% | 1,625,000 | $24.2M | Add +62.5% |
| FLR Fluor Corp. | 9.38% | 544,000 | $22.9M | Add +1.9% |
| DAN Dana Inc. | 8.87% | 1,080,000 | $21.6M | New |
| EOSE Eos Energy Enterprises Inc. | 8.19% | 1,754,000 | $20.0M | Add +1.8% |
| NVRI Enviri Corp. | 7.28% | 1,400,000 | $17.8M | No change |
| MAGN Magnera Corp. | 2.69% | 560,000 | $6.6M | Add +0.9% |
| TSEOQ Trinseo PLC | 1.02% | 1,060,000 | $2.5M | Add +3.7% |
Portfolio Sells Q2 2025 → Q3 2025
| TPC Tutor Perini Corp. | Sold out | 0.00% | −14.21 |
| TOL Toll Brothers Inc. | Sold out | 0.00% | −7.87 |
| NEXT Nextdecade Corp. | Sold out | 0.00% | −5.57 |
| TTI Tetra Technologies Inc. | Sold out | 0.00% | −3.84 |
| TPICQ Tpi Composites Inc. | Sold out | 0.00% | −0.64 |
| BW Babcock & Wilcox Enterpr | Sold out | 0.00% | −0.64 |
| SEI Solaris Energy Infrastructur | Reduce -10.6% | 16.43% | +2.76 |
Portfolio Buys Q2 2025 → Q3 2025
| VSAT Viasat Inc. | Add +1.8% | 24.45% | +11.87 |
| DAN Dana Inc. | New | 8.87% | +8.87 |
| EOSE Eos Energy Enterprises Inc. | Add +1.8% | 8.19% | +4.39 |
| CSTM Constellium SE | Add +62.5% | 9.91% | +4.18 |
| AMTM Amentum Holdings Inc. | Add +20.0% | 11.78% | +1.61 |
| MAGN Magnera Corp. | Add +0.9% | 2.69% | −0.20 |
| TSEOQ Trinseo PLC | Add +3.7% | 1.02% | −0.35 |
| FLR Fluor Corp. | Add +1.9% | 9.38% | −2.41 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 11 | $461.5M | VSAT, CSTM, RRX, FLR, ECVT |
| Q1 2026 | 9 | $338.1M | VSAT, CSTM, DAN, AMTM, ECVT |
| Q4 2025 | 8 | $247.4M | VSAT, AMTM, CSTM, DAN, FLR |
| Q3 2025 | 10 | $244.0M | VSAT, SEI, AMTM, CSTM, FLR |
| Q2 2025 | 15 | $232.2M | TPC, SEI, VSAT, FLR, AMTM |
| Q1 2025 | 12 | $115.3M | SEI, FLR, TPC, MAGN, TTI |
| Q4 2024 | 13 | $145.8M | SEI, FLR, REVG, CDLR, TPC |
| Q3 2024 | 20 | $236.8M | FLR, MBC, CDLR, REVG, HOV |
| Q2 2024 | 19 | $201.5M | OVERSEAS SHIPHOLDING GROUP-A, CDLR, REVG, FLR, MBC |
| Q1 2024 | 15 | $166.2M | MBC, BZH, CLF, REVG, CSTM |