Skip to content
Disclosery

BRIGHTLINE CAPITAL MANAGEMENT, LLC

Follow

13F filer, CIK 1432450, Miami, FL

BRIGHTLINE CAPITAL MANAGEMENT, LLC reported $247,366,550 across 8 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-13.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000919574-26-000890

Period
2025-12-31
Reported value
$247M
Holdings
8
Top 10 weight
100%
New
2
Sold out
4

Largest buys vs the previous quarter

SecurityShares changeApprox. value
ECVTnew+2,050,000$19.9M
KALUnew+168,000$19.3M
AMTMadded+192,000$5.57M
CSTMadded+217,000$4.09M
VSATadded+58,000$2M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
SEIreduced-753,000-$34.6M
EOSEexited-1,754,000-$20M
NVRIexited-1,400,000-$17.8M
MAGNexited-560,000-$6.56M
Trinseo PLCexited-1,060,000-$2.49M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0000919574-26-000890, largest first. % of portfolio is the value over $247,366,550, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
VSATVIASAT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 2,000,000 shares; 2025Q3: 2,036,000 shares; 2025Q4: 2,094,000 shares 2,094,000$72.2M29.17%+58,000Timeline
AMTMAMENTUM HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 1,000,000 shares; 2025Q3: 1,200,000 shares; 2025Q4: 1,392,000 shares 1,392,000$40.4M16.32%+192,000Timeline
CSTMCONSTELLIUM SEQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 712,000 shares; 2024Q4: 711,000 shares; 2025Q1: 745,000 shares; 2025Q2: 1,000,000 shares; 2025Q3: 1,625,000 shares; 2025Q4: 1,842,000 shares 1,842,000$34.7M14.04%+217,000Timeline
DANDANA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 1,080,000 shares; 2025Q4: 1,146,000 shares 1,146,000$27.2M11.01%+66,000Timeline
FLRFLUOR CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 455,000 shares; 2024Q4: 523,000 shares; 2025Q1: 535,000 shares; 2025Q2: 534,000 shares; 2025Q3: 544,000 shares; 2025Q4: 559,000 shares 559,000$22.2M8.96%+15,000Timeline
ECVTECOVYST INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 2,050,000 shares 2,050,000$19.9M8.06%newTimeline
KALUKAISER ALUMINIUM CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 100,000 shares; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 168,000 shares 168,000$19.3M7.8%newTimeline
SEISOLARIS ENERGY INFRAS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,100,000 shares; 2024Q4: 1,114,000 shares; 2025Q1: 1,117,000 shares; 2025Q2: 1,122,000 shares; 2025Q3: 1,003,000 shares; 2025Q4: 250,000 shares 250,000$11.5M4.65%-753,000Timeline

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
EOSEEOS ENERGY ENTERPRISES INC1,754,000$20Mshares
NVRIENVIRI CORP1,400,000$17.8Mshares
MAGNMAGNERA CORP560,000$6.56Mshares
Trinseo PLCTrinseo PLC1,060,000$2.49Mshares

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0000919574-26-000890 base2026-02-13acceptance time not in the bulk data set