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BRIGHTLINE CAPITAL MANAGEMENT, LLC: CSTM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BRIGHTLINE CAPITAL MANAGEMENT, LLC on CSTM, newest first. How the timeline and the estimate are built.

BRIGHTLINE CAPITAL MANAGEMENT, LLC held 1,923,000 CSTM shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,923,000 shares
    Change vs previous 13F +76,000 shares

    13.28% of the 13F portfolio, value $61,286,010.

    13F-HR 0000919574-26-005369 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 1,847,000 shares
    Change vs previous 13F +5,000 shares

    13.43% of the 13F portfolio, value $45,399,260.

    13F-HR 0000919574-26-003269 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 1,842,000 shares
    Change vs previous 13F +217,000 shares

    14.04% of the 13F portfolio, value $34,721,700.

    13F-HR 0000919574-26-000890 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 1,625,000 shares
    Change vs previous 13F +625,000 shares

    9.91% of the 13F portfolio, value $24,180,000.

    13F-HR 0000919574-25-006647 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 1,000,000 shares
    Change vs previous 13F +255,000 shares

    5.73% of the 13F portfolio, value $13,300,000.

    13F-HR 0000919574-25-004682 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 745,000 shares
    Change vs previous 13F +34,000 shares

    6.52% of the 13F portfolio, value $7,517,050.

    13F-HR 0000919574-25-002912 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 711,000 shares
    Change vs previous 13F -1,000 shares

    5.01% of the 13F portfolio, value $7,301,970.

    13F-HR 0000919574-25-001107 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F 712,000 shares
    Change vs previous 13F not available

    4.89% of the 13F portfolio, value $11,577,120.

    13F-HR 0000919574-24-006423 filed by BRIGHTLINE CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).