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BLAIR WILLIAM & CO/IL: MKL position timeline

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

BLAIR WILLIAM & CO/IL held 7,173 MKL 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 7,173 shares
    Change vs previous 13F -139 shares

    0.04% of the 13F portfolio, value $14,008,941.

    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 7,312 shares
    Change vs previous 13F -395 shares

    0.04% of the 13F portfolio, value $13,995,680.

    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 7,707 shares
    Change vs previous 13F +62 shares

    0.04% of the 13F portfolio, value $16,567,890.

    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 7,645 shares
    Change vs previous 13F -2,843 shares

    0.04% of the 13F portfolio, value $14,612,347.

    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 10,488 shares
    Change vs previous 13F +405 shares

    0.06% of the 13F portfolio, value $20,948,312.

    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 10,083 shares
    Change vs previous 13F -211 shares

    0.06% of the 13F portfolio, value $18,851,278.

    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 10,294 shares
    Change vs previous 13F +999 shares

    0.05% of the 13F portfolio, value $17,769,812.

    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 9,295 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $14,579,951.

    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).