DOSSIER · 13F-HR · Q1 2026

BRIGHTLINE CAPITAL MANAGEMENT, LLC

$338M in tracked AUM across 9 positions as of Q1 2026.

BC
CIK 0001432450 · last filed Mar 31, 2026
Total AUM
$338M
as of Q1 2026
Holdings
9
positions
Whale Score
69
69
tracked
Activity
no data
changes this Q
AI Analysis · Q1 2026
Comprehensive Analysis of Brightline Capital Management LLC 13F Filing
Portfolio Overview

Brightline Capital Management LLC manages a concentrated, high-conviction portfolio totaling approximately $152.96 million as of September 30, 2025. The firm employs a focused investment strategy, holding a mere six positions, which indicates a preference for high-conviction picks over broad diversification. The portfolio experienced significant growth during the quarter, increasing in value by 29.9% ...

The portfolio is heavily top-heavy, with the top two holdings—Viasat (VSAT) and Solaris Energy Infras (SEI)—accounting for nearly 65.2% of the total assets. This structure suggests that the firm’s performance is highly correlated with the success of these specific underlying businesses.

Key Holdings

The portfolio is dominated by three primary positions, with the remaining holdings serving as smaller satellite allocations.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
VSAT
VIASAT INC
$96M2.1M28.4%
02
F21107101
CONSTELLIUM SE
$45M1.8M13.4%
03
DAN
DANA INC
$39M1.1M11.4%
04
AMTM
AMENTUM HOLDINGS INC
$36M1.4M10.8%
05
ECVT
ECOVYST INC
$36M2.8M10.6%
06
FLR
FLUOR CORP NEW
$28M601K8.3%
07
RRX
REGAL REXNORD CORPORATION
$23M125K6.9%
08
KALU
KAISER ALUMINUM CORP
$21M175K6.2%
09
TGB
TASEKO MINES LTD
$13M2.0M3.8%

Filing history

2026Q1Mar 31
$338M 36.7%
9 positionsView →
2025Q4Dec 31
$247M 61.7%
8 positionsView →
2025Q3Sep 30
$153M 29.9%
6 positionsView →
2025Q2Jun 30
$118M 65.3%
10 positionsLocked
2025Q1Mar 31
$71M 51.1%
9 positionsLocked
2024Q4Dec 31
$146M 38.4%
13 positionsLocked
2024Q3Sep 30
$237M 17.5%
20 positionsLocked
2024Q2Jun 30
$201M 21.2%
19 positionsLocked
2024Q1Mar 31
$166M 80.3%
15 positionsLocked
2023Q4Dec 31
$92M 277.5%
10 positionsLocked
2023Q3Sep 30
$24M 179.9%
4 positionsLocked
2023Q2Jun 30
$9M
1 positionsLocked
Showing 12 of 35