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GILDER GAGNON HOWE & CO LLC: ALNY position timeline

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

GILDER GAGNON HOWE & CO LLC held 269,051 ALNY 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 269,051 shares
    Change vs previous 13F -11,041 shares

    0.84% of the 13F portfolio, value $80,992,374.

    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 280,092 shares
    Change vs previous 13F -39,213 shares

    1.11% of the 13F portfolio, value $92,674,097.

    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 319,305 shares
    Change vs previous 13F -10,016 shares

    1.34% of the 13F portfolio, value $126,971,702.

    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 329,321 shares
    Change vs previous 13F -7,767 shares

    1.53% of the 13F portfolio, value $150,170,500.

    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 337,088 shares
    Change vs previous 13F -8,487 shares

    1.17% of the 13F portfolio, value $109,921,115.

    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 345,575 shares
    Change vs previous 13F -19,888 shares

    1.22% of the 13F portfolio, value $93,312,289.

    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 365,463 shares
    Change vs previous 13F -18,530 shares

    0.93% of the 13F portfolio, value $85,997,210.

    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 383,993 shares
    Change vs previous 13F not available

    1.26% of the 13F portfolio, value $105,609,553.

    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).