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MARSHALL WACE, LLP: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MARSHALL WACE, LLP on BRK-B, newest first. How the timeline and the estimate are built.

MARSHALL WACE, LLP held 390,170 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 390,170 shares
    Change vs previous 13F -32,504 shares

    0.16% of the 13F portfolio, value $195,235,963.

    13F-HR 0001318757-26-000010 filed by MARSHALL WACE, LLP
    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 422,674 shares
    Change vs previous 13F +71,613 shares

    0.22% of the 13F portfolio, value $202,545,380.

    13F-HR 0001318757-26-000005 filed by MARSHALL WACE, LLP
    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 351,061 shares
    Change vs previous 13F +29,678 shares

    0.17% of the 13F portfolio, value $176,460,811.

    13F-HR 0001318757-26-000003 filed by MARSHALL WACE, LLP
    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 321,383 shares
    Change vs previous 13F +86,251 shares

    0.18% of the 13F portfolio, value $161,572,090.

    13F-HR 0001318757-25-000046 filed by MARSHALL WACE, LLP
    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 235,132 shares
    Change vs previous 13F +206,104 shares

    0.14% of the 13F portfolio, value $114,220,072.

    13F-HR 0001318757-25-000034 filed by MARSHALL WACE, LLP
    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 29,028 shares
    Change vs previous 13F +28,628 shares

    0.02% of the 13F portfolio, value $15,459,731.

    13F-HR 0001318757-25-000023 filed by MARSHALL WACE, LLP
    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 400 shares
    Change vs previous 13F -300 shares

    <0.01% of the 13F portfolio, value $181,312.

    13F-HR 0002048047-25-000005 filed by MARSHALL WACE, LLP
    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 700 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $322,182.

    13F-HR 0001318757-24-000018 filed by MARSHALL WACE, LLP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).