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MILLENNIUM MANAGEMENT LLC: BRK-B position timeline

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

MILLENNIUM MANAGEMENT LLC held 587,670 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 587,670 shares
    Change vs previous 13F -65,470 shares

    0.2% of the 13F portfolio, value $294,064,191.

    13F-HR 0001273087-26-000007 filed by MILLENNIUM MANAGEMENT LLC
    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 653,140 shares
    Change vs previous 13F +401,091 shares

    0.23% of the 13F portfolio, value $312,984,688.

    13F-HR 0001273087-26-000004 filed by MILLENNIUM MANAGEMENT LLC
    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 252,049 shares
    Change vs previous 13F -448,282 shares

    0.09% of the 13F portfolio, value $126,692,430.

    13F-HR 0001273087-26-000002 filed by MILLENNIUM MANAGEMENT LLC
    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 700,331 shares
    Change vs previous 13F +511,207 shares

    0.28% of the 13F portfolio, value $352,084,407.

    13F-HR 0001273087-25-000034 filed by MILLENNIUM MANAGEMENT LLC
    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 189,124 shares
    Change vs previous 13F -378,122 shares

    0.08% of the 13F portfolio, value $91,870,765.

    13F-HR 0001273087-25-000028 filed by MILLENNIUM MANAGEMENT LLC
    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 567,246 shares
    Change vs previous 13F -116,581 shares

    0.29% of the 13F portfolio, value $302,103,875.

    13F-HR 0001273087-25-000019 filed by MILLENNIUM MANAGEMENT LLC
    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 683,827 shares
    Change vs previous 13F +263,482 shares

    0.27% of the 13F portfolio, value $309,965,103.

    13F-HR 0001273087-25-000015 filed by MILLENNIUM MANAGEMENT LLC
    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 420,345 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $193,467,990.

    13F-HR 0001273087-24-000118 filed by MILLENNIUM MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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