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SEI INVESTMENTS CO: ATO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of SEI INVESTMENTS CO on ATO, newest first. How the timeline and the estimate are built.

SEI INVESTMENTS CO held 192,466 ATO 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 192,466 shares
    Change vs previous 13F -320,359 shares

    0.03% of the 13F portfolio, value $33,155,628.

    13F-HR 0002048251-26-006553 filed by SEI INVESTMENTS CO
    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 512,825 shares
    Change vs previous 13F -61,274 shares

    0.09% of the 13F portfolio, value $94,728,865.

    13F-HR 0002048251-26-003739 filed by SEI INVESTMENTS CO
    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 574,099 shares
    Change vs previous 13F -63,722 shares

    0.09% of the 13F portfolio, value $96,236,501.

    13F-HR 0000350894-26-000005 filed by SEI INVESTMENTS CO
    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 637,821 shares
    Change vs previous 13F +44,350 shares

    0.12% of the 13F portfolio, value $108,907,794.

    13F-HR 0002048251-25-002343 filed by SEI INVESTMENTS CO
    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 593,471 shares
    Change vs previous 13F -3,820 shares

    0.11% of the 13F portfolio, value $91,459,565.

    13F-HR 0001041062-25-000162 filed by SEI INVESTMENTS CO
    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/A 597,291 shares
    Change vs previous 13F -3,163 shares

    0.12% of the 13F portfolio, value $92,329,304.

    13F-HR/A 0001041062-25-000106 filed by SEI INVESTMENTS CO
    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 600,454 shares
    Change vs previous 13F -83,866 shares

    0.11% of the 13F portfolio, value $83,625,353.

    13F-HR 0001041062-25-000019 filed by SEI INVESTMENTS CO
    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 684,320 shares
    Change vs previous 13F not available

    0.12% of the 13F portfolio, value $94,921,217.

    13F-HR 0001041062-24-000165 filed by SEI INVESTMENTS CO
    Filed (acceptance time not in the bulk data set), ingested

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