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DUFF & PHELPS INVESTMENT MANAGEMENT CO: ATO position timeline

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

DUFF & PHELPS INVESTMENT MANAGEMENT CO held 637,725 ATO shares at 2026-06-30 per its 13F-HR/A filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F/A 637,725 shares
    Change vs previous 13F +29,780 shares

    1.04% of the 13F portfolio, value $109,860,886.

    13F-HR/A 0001140361-26-032766 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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/A 607,945 shares
    Change vs previous 13F -44,361 shares

    1.17% of the 13F portfolio, value $112,299,600.

    13F-HR/A 0001140361-26-029563 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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 652,306 shares
    Change vs previous 13F -45,198 shares

    1.24% of the 13F portfolio, value $109,346,055.

    13F-HR 0001140361-26-002362 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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 697,504 shares
    Change vs previous 13F -47,674 shares

    1.35% of the 13F portfolio, value $119,098,808.

    13F-HR 0001140361-25-041885 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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 745,178 shares
    Change vs previous 13F -68,150 shares

    1.35% of the 13F portfolio, value $114,839,382.

    13F-HR 0001140361-25-030078 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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 813,328 shares
    Change vs previous 13F -6,130 shares

    1.47% of the 13F portfolio, value $125,724,242.

    13F-HR 0001140361-25-018540 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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 819,458 shares
    Change vs previous 13F -35,081 shares

    1.37% of the 13F portfolio, value $114,125,916.

    13F-HR 0001140361-25-003945 filed by DUFF & PHELPS INVESTMENT MANAGEMENT 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 854,539 shares
    Change vs previous 13F not available

    1.36% of the 13F portfolio, value $118,533,105.

    13F-HR 0001140361-24-047052 filed by DUFF & PHELPS INVESTMENT MANAGEMENT CO
    Filed (acceptance time not in the bulk data set), ingested

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