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OBSIDIAN CIO, LLC: BRK-B position timeline

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

OBSIDIAN CIO, LLC held 222 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-03.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 222 shares
    Change vs previous 13F +65 shares

    0.08% of the 13F portfolio, value $111,087.

    13F-HR 0001843581-26-000006 filed by OBSIDIAN CIO, 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 157 shares
    Change vs previous 13F +121 shares

    0.07% of the 13F portfolio, value $75,234.

    13F-HR 0001843581-26-000004 filed by OBSIDIAN CIO, 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 36 shares
    Change vs previous 13F -2,210 shares

    0.03% of the 13F portfolio, value $18,095.

    13F-HR 0001843581-26-000003 filed by OBSIDIAN CIO, 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 2,246 shares
    Change vs previous 13F +139 shares

    0.15% of the 13F portfolio, value $1,129,154.

    13F-HR 0001843581-25-000007 filed by OBSIDIAN CIO, 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 2,107 shares
    Change vs previous 13F -1,799 shares

    0.15% of the 13F portfolio, value $1,023,517.

    13F-HR 0001843581-25-000006 filed by OBSIDIAN CIO, 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 3,906 shares
    Change vs previous 13F +110 shares

    0.34% of the 13F portfolio, value $2,080,257.

    13F-HR 0001843581-25-000004 filed by OBSIDIAN CIO, 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 3,796 shares
    Change vs previous 13F -20 shares

    0.31% of the 13F portfolio, value $1,720,651.

    13F-HR 0001843581-25-000002 filed by OBSIDIAN CIO, 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 3,816 shares
    Change vs previous 13F not available

    0.37% of the 13F portfolio, value $1,756,352.

    13F-HR 0001843581-24-000006 filed by OBSIDIAN CIO, LLC
    Filed (acceptance time not in the bulk data set), ingested

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