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Ilmarinen Mutual Pension Insurance Co: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Ilmarinen Mutual Pension Insurance Co on BRK-B, newest first. How the timeline and the estimate are built.

Ilmarinen Mutual Pension Insurance Co held 188,840 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 188,840 shares
    Change vs previous 13F -8,500 shares

    0.64% of the 13F portfolio, value $94,494,000.

    13F-HR 0001661580-26-000004 filed by Ilmarinen Mutual Pension Insurance Co
    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 197,340 shares
    Change vs previous 13F not available

    0.74% of the 13F portfolio, value $94,565,000.

    13F-HR 0001661580-26-000002 filed by Ilmarinen Mutual Pension Insurance Co
    Filed (acceptance time not in the bulk data set), ingested

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