BC
Brightline Capital Management, LLC 13F Holdings & Position Changes (Q2 2026)
Brightline Capital Management, LLCCIK: 0001432450
Sector-focusedMomentum followerConcentrated strategy
Total reported value
$461.5M
Reporting period: 2026-06-30 · Number of holdings: 11
BRIGHTLINE CAPITAL MANAGEMENT, LLC disclosed 11 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $461.5M and a quarterly turnover rate of 69.6%.
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Personality snowflake
- Concentration
- 86.43
- Portfolio Stability
- 69.65
- Momentum
- 100
- Sector conviction
- 100
- Diversification
- 22
- Sizing Uniformity
- 87.69
Brightline Capital Management, LLC's disclosed holdings carry a Herfindahl concentration index of 0.216 — mathematically equivalent to about 5 equally-sized positions, well below its 11 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.23), with a handful of outsized bets alongside many smaller positions.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 10.4 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Sector classification currently covers about 63% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd VSAT
+0.6% $93.5M
Sold out AMTM
Sold out KALU
Trim DAN
+0.9% -$7.1M
New buy HRI
Sold out TGB
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | VSAT | Viasat Inc | Stock-Tech | 41.10% | +12.66% | +0.57% | |
| 2 | CSTM | Constellium SE | Stock-Other | 13.28% | -0.15% | +4.11% | |
| 3 | RRX | Regal Rexnord CORP | Stock-Industrials | 8.41% | +1.49% | +30.40% | |
| 4 | FLR | Fluor CORP | Stock-Industrials | 8.21% | -0.08% | +20.30% | |
| 5 | ECVT | Ecovyst Inc | Stock-Other | 8.13% | -2.53% | +7.57% | |
| 6 | DAN | Dana Inc | Stock-Other | 6.84% | -4.60% | +0.87% | |
| 7 | HRI | Herc Holdings Inc | Stock-Other | 4.41% | +4.41% | NEW | |
| 8 | ✓ | Stock-Other | 3.28% | +3.28% | NEW | ||
| 9 | OC | Owens Corning | Stock-Industrials | 2.76% | +2.76% | NEW | |
| 10 | WSC | Willscot Holdings CORP | Stock-Industrials | 2.14% | +2.14% | NEW | |
| 11 | ASTL | Algoma Steel Group Inc | Stock-Other | 1.46% | +1.46% | NEW |
Portfolio Performance
Performance for Q3 2026
-13.9%
Performance Last 4 Quarters
+58.6%
- Stdev
- +37.5%
- Beta
- +2.15
- Alpha
- -6.8%
- Max Drawdown
- -33.1%
- Annualized Perf
- +34.1%
- Batting Avg vs S&P
- +50%
- Sortino
- +2.03
- Stutzer
- +0.29
- Treynor
- +0.17
- Sterling
- +1.21
- Calmar
- +1.03
- Information Ratio
- +0.56
- Tracking Error
- +29.2%
- Stdev Down
- +17.8%
- Winning Months %
- +55.6%
- Losing Months %
- +44.4%
- Best 12 Months
- +173.8%
- Worst 12 Months
- -32%
- Efficiency Ratio
- +0.45
- Sharpe
- +0.97
- Stdev Sectors
- +15.6%
- Skewness
- +0.36
- Kurtosis
- -0.65
- Upside Potential
- +3.97
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 11 | $461.5M | 70 | ||
| 2026 Q1 | 9 | $338.1M | 42 | ||
| 2025 Q4 | 8 | $247.4M | 63 | ||
| 2025 Q3 | 10 | $244.0M | 88 | ||
| 2025 Q2 | 15 | $232.2M | 0 | ||
| 2025 Q1 | 12 | $115.3M | 100 | ||
| 2024 Q4 | 13 | $145.8M | 0 | ||
| 2024 Q3 | 20 | $236.8M | 0 | ||
| 2024 Q2 | 19 | $201.5M | 0 | ||
| 2024 Q1 | 15 | $166.2M | 0 | ||
| 2023 Q4 | 10 | $92.2M | 0 | ||
| 2023 Q3 | 4 | $24.4M | 0 | ||
| 2023 Q2 | 1 | $8.7M | 0 | ||
| 2023 Q1 | 1 | — | 0 | ||
| 2022 Q4 | 5 | $45.4M | 0 | ||
| 2022 Q3 | 5 | $49.7M | 0 | ||
| 2022 Q2 | 4 | $43.1M | 0 | ||
| 2022 Q1 | 9 | $143.1M | 0 | ||
| 2021 Q4 | 13 | $162.8M | 0 | ||
| 2021 Q3 | 12 | $139.8M | 0 | ||
| 2021 Q2 | 11 | $148.6M | 100 | ||
| 2021 Q1 | 13 | $148.2M | 71 | ||
| 2020 Q4 | 15 | $132.5M | 90 | ||
| 2020 Q3 | 11 | $82.4M | 100 | ||
| 2020 Q2 | 6 | $26.4M | 100 | ||
| 2020 Q1 | 1 | — | 100 | ||
| 2019 Q4 | 10 | $127.4M | 100 | ||
| 2019 Q3 | 13 | $106.5M | 100 | 165336k212008r305591b | |
| 2019 Q2 | 11 | $95.0M | 91 | ||
| 2019 Q1 | 11 | $62.6M | 100 | ||
| 2018 Q4 | 2 | $18.4M | 100 | ||
| 2018 Q3 | 7 | $242.1M | 30 | ||
| 2018 Q2 | 17 | $313.8M | 23 | ||
| 2018 Q1 | 14 | $263.5M | 100 | ||
| 2017 Q4 | 18 | $113.2M | 0 |
Holding changes this quarter
Brightline Capital Management, LLC's most significant position changes for 2026-06-30: Sold out: Amentum Holdings Inc (AMTM); Sold out: Kaiser Aluminum CORP (KALU); New buy: Herc Holdings Inc (HRI); New buy: ; Sold out: Taseko Mines LTD (TGB).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | VSAT | Viasat Inc | +12.7% | +0.57% | Add |
| 2 | HRI | Herc Holdings Inc | +4.4% | NEW | New buy |
| 3 | ✓ | +3.3% | NEW | New buy | |
| 4 | OC | Owens Corning | +2.8% | NEW | New buy |
| 5 | WSC | Willscot Holdings CORP | +2.1% | NEW | New buy |
| 6 | RRX | Regal Rexnord CORP | +1.5% | +30.40% | Add |
| 7 | ASTL | Algoma Steel Group Inc | +1.5% | NEW | New buy |
| 8 | FLR | Fluor CORP | -0.1% | +20.30% | Add |
| 9 | CSTM | Constellium SE | -0.2% | +4.11% | Add |
| 10 | ECVT | Ecovyst Inc | -2.5% | +7.57% | Add |
| 11 | TGB | Taseko Mines LTD | -3.8% | EXIT | Sold out |
| 12 | DAN | Dana Inc | -4.6% | +0.87% | Add |
| 13 | KALU | Kaiser Aluminum CORP | -6.2% | EXIT | Sold out |
| 14 | AMTM | Amentum Holdings Inc | -10.8% | EXIT | Sold out |
Filing History
FAQ
What is Brightline Capital Management, LLC and what type of investor is it?
Brightline Capital Management, LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $461.5M, spread across 11 disclosed positions.
What are Brightline Capital Management, LLC's largest equity positions?
Based on the latest 13F filing, Brightline Capital Management, LLC's top holdings by market value are:
1. Viasat Inc (VSAT) — $189.7M (41.1%)
2. Constellium SE (CSTM) — $61.3M (13.3%)
3. Regal Rexnord CORP (RRX) — $38.8M (8.4%)
4. Fluor CORP (FLR) — $37.9M (8.2%)
5. Ecovyst Inc (ECVT) — $37.5M (8.1%)
What changes did Brightline Capital Management, LLC make in its most recent portfolio filing?
In the latest reported quarter, Brightline Capital Management, LLC made 14 notable position adjustments: 5 new positions were initiated, 6 existing holdings were added to, 0 positions were partially reduced, and 3 were completely exited. The largest of these moves: Sold out: Amentum Holdings Inc (AMTM); Sold out: Kaiser Aluminum CORP (KALU); New buy: Herc Holdings Inc (HRI); New buy: ; Sold out: Taseko Mines LTD (TGB)
What sectors does Brightline Capital Management, LLC focus on?
Brightline Capital Management, LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 65.6%
• Industrials: 34.4%
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Investment Profile
Brightline Capital Management, LLC returned an annualized 34.1% over the trailing 36 months — underperforming the S&P 500 by 6.8 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 2.15 (more volatile than the market) and a 50% quarterly batting average against the index.
Its portfolio is concentrated and fast-trading, with 65.6% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 70 over the past 4 quarters — a shift toward more active trading.
It has added to its VSAT position for two straight quarters, increasing it by $117.5M to reach $189.7M.
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