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Disclosery

AVENIR CORP: BRK-B position timeline

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

AVENIR CORP held 107,115 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 107,115 shares
    Change vs previous 13F -1,826 shares

    6.53% of the 13F portfolio, value $53,599,375.

    13F-HR 0001033475-26-000006 filed by AVENIR CORP
    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 108,941 shares
    Change vs previous 13F -807 shares

    6.36% of the 13F portfolio, value $52,204,336.

    13F-HR 0001033475-26-000005 filed by AVENIR CORP
    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 109,748 shares
    Change vs previous 13F -959 shares

    5.99% of the 13F portfolio, value $55,164,631.

    13F-HR 0001033475-26-000002 filed by AVENIR CORP
    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 110,707 shares
    Change vs previous 13F -2,382 shares

    5.8% of the 13F portfolio, value $55,656,636.

    13F-HR 0001033475-25-000009 filed by AVENIR CORP
    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 113,089 shares
    Change vs previous 13F -748 shares

    5.65% of the 13F portfolio, value $54,935,414.

    13F-HR 0001033475-25-000007 filed by AVENIR CORP
    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 113,837 shares
    Change vs previous 13F -930 shares

    6.36% of the 13F portfolio, value $60,627,496.

    13F-HR 0001033475-25-000005 filed by AVENIR CORP
    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 114,767 shares
    Change vs previous 13F -3,993 shares

    5.33% of the 13F portfolio, value $52,021,631.

    13F-HR 0001033475-25-000003 filed by AVENIR CORP
    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 118,760 shares
    Change vs previous 13F not available

    5.51% of the 13F portfolio, value $54,660,524.

    13F-HR 0001033475-24-000007 filed by AVENIR CORP
    Filed (acceptance time not in the bulk data set), ingested

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