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BLAIR WILLIAM & CO/IL: ARKK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BLAIR WILLIAM & CO/IL on ARKK, newest first. How the timeline and the estimate are built.

BLAIR WILLIAM & CO/IL held 15,060 ARKK shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 15,060 shares
    Change vs previous 13F -1,383 shares

    <0.01% of the 13F portfolio, value $1,217,149.

    13F-HR 0001104659-26-093821 filed by BLAIR WILLIAM & CO/IL
    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 16,443 shares
    Change vs previous 13F -2,171 shares

    <0.01% of the 13F portfolio, value $1,111,382.

    13F-HR 0001104659-26-057897 filed by BLAIR WILLIAM & CO/IL
    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 18,614 shares
    Change vs previous 13F +1,897 shares

    <0.01% of the 13F portfolio, value $1,431,789.

    13F-HR 0001104659-26-015563 filed by BLAIR WILLIAM & CO/IL
    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 16,717 shares
    Change vs previous 13F -9,704 shares

    <0.01% of the 13F portfolio, value $1,442,677.

    13F-HR 0001104659-25-109927 filed by BLAIR WILLIAM & CO/IL
    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 26,421 shares
    Change vs previous 13F -19,101 shares

    0.01% of the 13F portfolio, value $1,857,115.

    13F-HR 0001104659-25-070274 filed by BLAIR WILLIAM & CO/IL
    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 45,522 shares
    Change vs previous 13F -50,386 shares

    0.01% of the 13F portfolio, value $2,165,921.

    13F-HR 0001104659-25-046545 filed by BLAIR WILLIAM & CO/IL
    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 95,908 shares
    Change vs previous 13F +50,639 shares

    0.02% of the 13F portfolio, value $5,444,678.

    13F-HR 0001104659-25-011872 filed by BLAIR WILLIAM & CO/IL
    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 45,269 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $2,151,612.

    13F-HR 0001104659-24-116499 filed by BLAIR WILLIAM & CO/IL
    Filed (acceptance time not in the bulk data set), ingested

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