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MASON CAPITAL MANAGEMENT LLC: RC position timeline

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

MASON CAPITAL MANAGEMENT LLC held 4,319,933 RC 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 4,319,933 shares
    Change vs previous 13F 0 shares

    1.25% of the 13F portfolio, value $7,559,883.

    13F-HR 0001104659-26-097052 filed by MASON 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 4,319,933 shares
    Change vs previous 13F +543,794 shares

    1.14% of the 13F portfolio, value $6,998,291.

    13F-HR 0001104659-26-062410 filed by MASON 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 3,776,139 shares
    Change vs previous 13F +3,776,139 shares

    1.47% of the 13F portfolio, value $8,231,983.

    13F-HR 0001104659-26-016335 filed by MASON 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 ended2025-03-31
    13F 0 shares
    Change vs previous 13F -278,856 shares

    13F-HR 0001104659-25-049417 filed by MASON CAPITAL MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  5. period ended2024-12-31
    13F 278,856 shares
    Change vs previous 13F -560,000 shares

    0.4% of the 13F portfolio, value $1,901,798.

    13F-HR 0001104659-25-014023 filed by MASON 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 ended2024-09-30
    13F 838,856 shares
    Change vs previous 13F not available

    1.27% of the 13F portfolio, value $6,400,471.

    13F-HR 0001104659-24-118983 filed by MASON CAPITAL MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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