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BLAIR WILLIAM & CO/IL: MPLX position timeline

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

BLAIR WILLIAM & CO/IL held 37,418 MPLX 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 37,418 shares
    Change vs previous 13F -1,493 shares

    0.01% of the 13F portfolio, value $2,107,756.

    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 38,911 shares
    Change vs previous 13F +1,767 shares

    0.01% of the 13F portfolio, value $2,220,651.

    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 37,144 shares
    Change vs previous 13F +2,602 shares

    0.01% of the 13F portfolio, value $1,982,376.

    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 34,542 shares
    Change vs previous 13F +1,092 shares

    <0.01% of the 13F portfolio, value $1,725,371.

    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 33,450 shares
    Change vs previous 13F -37 shares

    <0.01% of the 13F portfolio, value $1,722,988.

    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 33,487 shares
    Change vs previous 13F +14,967 shares

    0.01% of the 13F portfolio, value $1,792,248.

    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 18,520 shares
    Change vs previous 13F +5,965 shares

    <0.01% of the 13F portfolio, value $886,360.

    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 12,555 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $558,179.

    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).