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BLAIR WILLIAM & CO/IL: CMCSA position timeline

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

BLAIR WILLIAM & CO/IL held 108,223 CMCSA 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 108,223 shares
    Change vs previous 13F -24,880 shares

    0.01% of the 13F portfolio, value $2,656,883.

    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 133,103 shares
    Change vs previous 13F -16,726 shares

    0.01% of the 13F portfolio, value $3,821,381.

    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 149,829 shares
    Change vs previous 13F -55,374 shares

    0.01% of the 13F portfolio, value $4,478,392.

    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 205,203 shares
    Change vs previous 13F -32,714 shares

    0.02% of the 13F portfolio, value $6,447,488.

    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 237,917 shares
    Change vs previous 13F -26,536 shares

    0.02% of the 13F portfolio, value $8,491,258.

    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 264,453 shares
    Change vs previous 13F -85,530 shares

    0.03% of the 13F portfolio, value $9,758,310.

    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 349,983 shares
    Change vs previous 13F -22,595 shares

    0.04% of the 13F portfolio, value $13,134,865.

    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 372,578 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $15,562,584.

    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).