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Gates Capital Management, Inc.: ATKR position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Gates Capital Management, Inc. on ATKR, newest first. How the timeline and the estimate are built.

Gates Capital Management, Inc. held 1,710,192 ATKR 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 1,710,192 shares
    Change vs previous 13F -975,526 shares

    4.27% of the 13F portfolio, value $130,043,000.

    13F-HR 0001172661-26-003599 filed by Gates Capital Management, Inc.
    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 2,685,718 shares
    Change vs previous 13F -47,429 shares

    5.46% of the 13F portfolio, value $158,215,647.

    13F-HR 0001172661-26-002331 filed by Gates Capital Management, Inc.
    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 2,733,147 shares
    Change vs previous 13F -210,901 shares

    6.02% of the 13F portfolio, value $172,871,548.

    13F-HR 0001172661-26-001134 filed by Gates Capital Management, Inc.
    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 2,944,048 shares
    Change vs previous 13F +315,859 shares

    5.72% of the 13F portfolio, value $184,709,572.

    13F-HR 0001172661-25-004848 filed by Gates Capital Management, Inc.
    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 2,628,189 shares
    Change vs previous 13F -636,872 shares

    5.59% of the 13F portfolio, value $185,418,734.

    13F-HR 0001172661-25-003468 filed by Gates Capital Management, Inc.
    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 3,265,061 shares
    Change vs previous 13F +657,707 shares

    6.08% of the 13F portfolio, value $195,871,009.

    13F-HR 0001172661-25-002189 filed by Gates Capital Management, Inc.
    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 2,607,354 shares
    Change vs previous 13F +595,774 shares

    6.4% of the 13F portfolio, value $217,583,691.

    13F-HR 0001172661-25-001043 filed by Gates Capital Management, Inc.
    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 2,011,580 shares
    Change vs previous 13F not available

    4.84% of the 13F portfolio, value $170,461,289.

    13F-HR 0001172661-24-004795 filed by Gates Capital Management, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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