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MATTERN CAPITAL MANAGEMENT, LLC: ATO position timeline

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

MATTERN CAPITAL MANAGEMENT, LLC held 59,371 ATO shares at 2026-06-30 per its 13F-HR filed 2026-07-24.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 59,371 shares
    Change vs previous 13F -335 shares

    1.19% of the 13F portfolio, value $10,227,842.

    13F-HR 0001725547-26-000252 filed by MATTERN 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 59,706 shares
    Change vs previous 13F +1,180 shares

    1.32% of the 13F portfolio, value $11,028,892.

    13F-HR 0001725547-26-000166 filed by MATTERN 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 58,526 shares
    Change vs previous 13F -1,540 shares

    1.16% of the 13F portfolio, value $9,810,713.

    13F-HR 0001725547-26-000059 filed by MATTERN 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 60,066 shares
    Change vs previous 13F -1,524 shares

    1.21% of the 13F portfolio, value $10,256,270.

    13F-HR 0001725547-25-004185 filed by MATTERN 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 61,590 shares
    Change vs previous 13F +99 shares

    1.14% of the 13F portfolio, value $9,491,635.

    13F-HR 0001725547-25-003493 filed by MATTERN 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 61,491 shares
    Change vs previous 13F -3,500 shares

    1.21% of the 13F portfolio, value $9,505,279.

    13F-HR 0001725547-25-001447 filed by MATTERN 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 64,991 shares
    Change vs previous 13F -1,420 shares

    1.18% of the 13F portfolio, value $9,051,297.

    13F-HR 0001725547-25-000291 filed by MATTERN 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 66,411 shares
    Change vs previous 13F not available

    1.16% of the 13F portfolio, value $9,211,870.

    13F-HR 0001725547-24-005983 filed by MATTERN CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

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