Brightline Capital Management, LLC
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 13, 2026), Brightline Capital Management, LLC reported 8 stock positions worth $247.4 million. Its top holding was Viasat (VSAT) at 29.2% of the portfolio, followed by Amentum (AMTM, 16.3%) and Constellium (CSTM, 14.0%). Compared with Q3 2025, it opened 2 new positions, sold out of 4, added to 5 and reduced 1. The biggest buy was a new position in Ecovyst (ECVT) and the biggest sale Solaris Energy Infrastructur (SEI, shares −75%).
- Most Recent 13F
- Q2 2026
- Location
- Miami, FL
- CIK
- 0001432450
- Portfolio Value
- $247.4M (Q4 2025)
- SEC Filing
- 0000919574-26-000890 ↗ filed Feb 13, 2026
Holdings Value
Holdings 8 stocks · $247.4M
| VSAT Viasat Inc. | 29.17% | 2,094,000 | $72.2M | Add +2.9% |
| AMTM Amentum Holdings Inc. | 16.32% | 1,392,000 | $40.4M | Add +16.0% |
| CSTM Constellium SE | 14.04% | 1,842,000 | $34.7M | Add +13.3% |
| DAN Dana Inc. | 11.01% | 1,146,000 | $27.2M | Add +6.1% |
| FLR Fluor Corp. | 8.96% | 559,000 | $22.2M | Add +2.8% |
| ECVT Ecovyst Inc. | 8.06% | 2,050,000 | $19.9M | New |
| KALU Kaiser Aluminum Corp. | 7.80% | 168,000 | $19.3M | New |
| SEI Solaris Energy Infrastructur | 4.65% | 250,000 | $11.5M | Reduce -75.1% |
Portfolio Sells Q3 2025 → Q4 2025
Portfolio Buys Q3 2025 → Q4 2025
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 |