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GILDER GAGNON HOWE & CO LLC: ARM position timeline

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

GILDER GAGNON HOWE & CO LLC held 461,461 ARM 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 461,461 shares
    Change vs previous 13F +53,204 shares

    1.69% of the 13F portfolio, value $163,620,221.

    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 408,257 shares
    Change vs previous 13F +41,528 shares

    0.74% of the 13F portfolio, value $61,761,117.

    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 366,729 shares
    Change vs previous 13F +18,662 shares

    0.42% of the 13F portfolio, value $40,087,145.

    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 348,067 shares
    Change vs previous 13F +978 shares

    0.5% of the 13F portfolio, value $49,247,998.

    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 347,089 shares
    Change vs previous 13F +663 shares

    0.6% of the 13F portfolio, value $56,138,172.

    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 346,426 shares
    Change vs previous 13F +18,583 shares

    0.48% of the 13F portfolio, value $36,994,831.

    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 327,843 shares
    Change vs previous 13F -17,586 shares

    0.44% of the 13F portfolio, value $40,442,711.

    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 345,429 shares
    Change vs previous 13F not available

    0.59% of the 13F portfolio, value $49,399,836.

    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).