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BLAIR WILLIAM & CO/IL: MU position timeline

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

BLAIR WILLIAM & CO/IL held 315,878 MU 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 315,878 shares
    Change vs previous 13F -16,433 shares

    0.95% of the 13F portfolio, value $364,615,192.

    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 332,311 shares
    Change vs previous 13F +32,341 shares

    0.32% of the 13F portfolio, value $112,268,109.

    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 299,970 shares
    Change vs previous 13F +78 shares

    0.23% of the 13F portfolio, value $85,614,432.

    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 299,892 shares
    Change vs previous 13F +5,934 shares

    0.13% of the 13F portfolio, value $50,177,848.

    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 293,958 shares
    Change vs previous 13F -13,192 shares

    0.1% of the 13F portfolio, value $36,230,297.

    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 307,150 shares
    Change vs previous 13F +6,829 shares

    0.08% of the 13F portfolio, value $26,688,282.

    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 300,321 shares
    Change vs previous 13F -2,564 shares

    0.07% of the 13F portfolio, value $25,275,033.

    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 302,885 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $31,412,225.

    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).