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Calamos Advisors LLC: BRK-B position timeline

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

Calamos Advisors LLC held 271,031 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-07-31.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 271,031 shares
    Change vs previous 13F -19,570 shares

    0.44% of the 13F portfolio, value $135,621,202.

    13F-HR 0001316507-26-000003 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 252,430 shares
    • Calamos Wealth Management LLC: 18,601 shares

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

  2. period ended2026-03-31
    13F 290,601 shares
    Change vs previous 13F +14,344 shares

    0.48% of the 13F portfolio, value $139,255,999.

    13F-HR 0001316507-26-000002 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 273,861 shares
    • Calamos Wealth Management LLC: 16,740 shares

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

  3. period ended2025-12-31
    13F 276,257 shares
    Change vs previous 13F -6,940 shares

    0.51% of the 13F portfolio, value $138,860,581.

    13F-HR 0001316507-26-000001 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 257,121 shares
    • Calamos Wealth Management LLC: 19,136 shares

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

  4. period ended2025-09-30
    13F 283,197 shares
    Change vs previous 13F -43,952 shares

    0.52% of the 13F portfolio, value $142,374,460.

    13F-HR 0001316507-25-000003 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 267,559 shares
    • Calamos Wealth Management LLC: 15,638 shares

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

  5. period ended2025-06-30
    13F 327,149 shares
    Change vs previous 13F +26,977 shares

    0.62% of the 13F portfolio, value $158,919,170.

    13F-HR 0001085146-25-004696 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 314,495 shares
    • Calamos Wealth Management LLC: 12,654 shares

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

  6. period ended2025-03-31
    13F 300,172 shares
    Change vs previous 13F +25,240 shares

    0.69% of the 13F portfolio, value $159,865,603.

    13F-HR 0001085146-25-002415 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 288,887 shares
    • Calamos Wealth Management LLC: 11,285 shares

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

  7. period ended2024-12-31
    13F 274,932 shares
    Change vs previous 13F +58 shares

    0.53% of the 13F portfolio, value $124,621,177.

    13F-HR 0001085146-25-000482 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 264,545 shares
    • Calamos Wealth Management LLC: 10,387 shares

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

  8. period ended2024-09-30
    13F 274,874 shares
    Change vs previous 13F not available

    0.54% of the 13F portfolio, value $126,513,508.

    13F-HR 0001085146-24-005402 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 264,545 shares
    • Calamos Wealth Management LLC: 10,329 shares

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