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Disclosery

Round Rock Advisors LLC: BRK-B position timeline

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

Round Rock Advisors LLC held 4,871 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 4,871 shares
    Change vs previous 13F +930 shares

    0.31% of the 13F portfolio, value $2,437,400.

    13F-HR 0001951757-26-001257 filed by Round Rock Advisors 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 3,941 shares
    Change vs previous 13F -1,003 shares

    0.29% of the 13F portfolio, value $1,888,527.

    13F-HR 0001951757-26-000878 filed by Round Rock Advisors 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/A 4,944 shares
    Change vs previous 13F +1,100 shares

    0.37% of the 13F portfolio, value $2,485,102.

    13F-HR/A 0001951757-26-000520 filed by Round Rock Advisors 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 3,844 shares
    Change vs previous 13F -713 shares

    0.31% of the 13F portfolio, value $1,932,533.

    13F-HR 0001951757-25-001443 filed by Round Rock Advisors 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 4,557 shares
    Change vs previous 13F +501 shares

    0.38% of the 13F portfolio, value $2,213,654.

    13F-HR 0001951757-25-001039 filed by Round Rock Advisors 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 4,056 shares
    Change vs previous 13F +1,050 shares

    0.4% of the 13F portfolio, value $2,160,144.

    13F-HR 0001951757-25-000487 filed by Round Rock Advisors 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 3,006 shares
    Change vs previous 13F +19 shares

    0.28% of the 13F portfolio, value $1,362,560.

    13F-HR 0001951757-25-000115 filed by Round Rock Advisors 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 2,987 shares
    Change vs previous 13F not available

    0.32% of the 13F portfolio, value $1,374,797.

    13F-HR 0001951757-24-001162 filed by Round Rock Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

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