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GILDER GAGNON HOWE & CO LLC: AMT position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GILDER GAGNON HOWE & CO LLC on AMT, newest first. How the timeline and the estimate are built.

GILDER GAGNON HOWE & CO LLC held 45,350 AMT 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 45,350 shares
    Change vs previous 13F -5,452 shares

    0.08% of the 13F portfolio, value $7,417,900.

    13F-HR 0001172661-26-003462 filed by GILDER GAGNON HOWE & CO 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 50,802 shares
    Change vs previous 13F -879 shares

    0.11% of the 13F portfolio, value $8,767,409.

    13F-HR 0001172661-26-002064 filed by GILDER GAGNON HOWE & CO 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 51,681 shares
    Change vs previous 13F -5,754 shares

    0.1% of the 13F portfolio, value $9,073,633.

    13F-HR 0001172661-26-000858 filed by GILDER GAGNON HOWE & CO 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 57,435 shares
    Change vs previous 13F -277 shares

    0.11% of the 13F portfolio, value $11,045,899.

    13F-HR 0001172661-25-004939 filed by GILDER GAGNON HOWE & CO 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 57,712 shares
    Change vs previous 13F -172 shares

    0.14% of the 13F portfolio, value $12,755,506.

    13F-HR 0001172661-25-003286 filed by GILDER GAGNON HOWE & CO 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 57,884 shares
    Change vs previous 13F -6,408 shares

    0.16% of the 13F portfolio, value $12,595,558.

    13F-HR 0001172661-25-002018 filed by GILDER GAGNON HOWE & CO 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 64,292 shares
    Change vs previous 13F -7,374 shares

    0.13% of the 13F portfolio, value $11,791,851.

    13F-HR 0001172661-25-001056 filed by GILDER GAGNON HOWE & CO 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 71,666 shares
    Change vs previous 13F not available

    0.2% of the 13F portfolio, value $16,666,598.

    13F-HR 0001172661-24-004863 filed by GILDER GAGNON HOWE & CO LLC
    Filed (acceptance time not in the bulk data set), ingested

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