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WELLINGTON MANAGEMENT GROUP LLP: BRK-B position timeline

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

WELLINGTON MANAGEMENT GROUP LLP held 3,618,141 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 3,618,141 shares
    Change vs previous 13F +1,972,551 shares

    0.31% of the 13F portfolio, value $1,810,481,574.

    13F-HR 0000902219-26-000311 filed by WELLINGTON MANAGEMENT GROUP 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 1,645,590 shares
    Change vs previous 13F +43,349 shares

    0.15% of the 13F portfolio, value $788,566,729.

    13F-HR 0000902219-26-000209 filed by WELLINGTON MANAGEMENT GROUP 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 1,602,241 shares
    Change vs previous 13F -83,440 shares

    0.14% of the 13F portfolio, value $805,366,438.

    13F-HR 0000902219-26-000103 filed by WELLINGTON MANAGEMENT GROUP 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 1,685,681 shares
    Change vs previous 13F -227,164 shares

    0.15% of the 13F portfolio, value $847,459,265.

    13F-HR 0000902219-25-000462 filed by WELLINGTON MANAGEMENT GROUP 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 1,912,845 shares
    Change vs previous 13F -447,032 shares

    0.17% of the 13F portfolio, value $929,202,715.

    13F-HR 0000902219-25-000356 filed by WELLINGTON MANAGEMENT GROUP 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 2,359,877 shares
    Change vs previous 13F +716,021 shares

    0.24% of the 13F portfolio, value $1,256,823,292.

    13F-HR 0000902219-25-000242 filed by WELLINGTON MANAGEMENT GROUP 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/A 1,643,856 shares
    Change vs previous 13F +389,842 shares

    0.14% of the 13F portfolio, value $745,127,049.

    13F-HR 0000902219-25-000131 filed by WELLINGTON MANAGEMENT GROUP 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 1,254,014 shares
    Change vs previous 13F not available

    0.1% of the 13F portfolio, value $577,172,484.

    13F-HR 0000902219-24-000498 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

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