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DUFF & PHELPS INVESTMENT MANAGEMENT CO: AMT position timeline

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

DUFF & PHELPS INVESTMENT MANAGEMENT CO held 1,039,175 AMT 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 1,039,175 shares
    Change vs previous 13F +118,285 shares

    1.6% of the 13F portfolio, value $169,977,855.

    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 920,890 shares
    Change vs previous 13F +3,035 shares

    1.65% of the 13F portfolio, value $158,927,196.

    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 917,855 shares
    Change vs previous 13F +7,604 shares

    1.83% of the 13F portfolio, value $161,147,802.

    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 910,251 shares
    Change vs previous 13F +32,385 shares

    1.98% of the 13F portfolio, value $175,059,472.

    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 877,866 shares
    Change vs previous 13F -13,057 shares

    2.28% of the 13F portfolio, value $194,025,943.

    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 890,923 shares
    Change vs previous 13F -19,815 shares

    2.27% of the 13F portfolio, value $193,864,845.

    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 910,738 shares
    Change vs previous 13F -2,351 shares

    2% of the 13F portfolio, value $167,038,457.

    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 913,089 shares
    Change vs previous 13F not available

    2.44% of the 13F portfolio, value $212,347,978.

    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).