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BLAIR WILLIAM & CO/IL: AMG position timeline

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

BLAIR WILLIAM & CO/IL held 11,787 AMG 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 11,787 shares
    Change vs previous 13F -96 shares

    0.01% of the 13F portfolio, value $3,988,732.

    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 11,883 shares
    Change vs previous 13F +1,159 shares

    0.01% of the 13F portfolio, value $3,288,034.

    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 10,724 shares
    Change vs previous 13F -12 shares

    0.01% of the 13F portfolio, value $3,091,523.

    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 10,736 shares
    Change vs previous 13F -149 shares

    0.01% of the 13F portfolio, value $2,559,791.

    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 10,885 shares
    Change vs previous 13F -1,364 shares

    0.01% of the 13F portfolio, value $2,141,846.

    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 12,249 shares
    Change vs previous 13F -200 shares

    0.01% of the 13F portfolio, value $2,058,203.

    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 12,449 shares
    Change vs previous 13F -44 shares

    0.01% of the 13F portfolio, value $2,302,072.

    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 12,493 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $2,221,258.

    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).