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Disclosery

W1M Asset Management Ltd: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of W1M Asset Management Ltd on BRK-B, newest first. How the timeline and the estimate are built.

W1M Asset Management Ltd held 57,305 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 57,305 shares
    Change vs previous 13F -11,832 shares

    0.26% of the 13F portfolio, value $28,666,253.

    13F-HR 0001172661-26-003335 filed by W1M Asset Management Ltd
    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 69,137 shares
    Change vs previous 13F +3,406 shares

    0.36% of the 13F portfolio, value $33,138,402.

    13F-HR 0001172661-26-002266 filed by W1M Asset Management Ltd
    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 65,731 shares
    Change vs previous 13F not available

    0.34% of the 13F portfolio, value $33,051,191.

    13F-HR 0001172661-26-000961 filed by W1M Asset Management Ltd
    Filed (acceptance time not in the bulk data set), ingested

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