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Calamos Advisors LLC: WMB position timeline

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

Calamos Advisors LLC held 576,274 WMB 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 576,274 shares
    Change vs previous 13F -14,737 shares

    0.14% of the 13F portfolio, value $42,840,210.

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

    • Calamos Advisors LLC: 566,949 shares
    • Calamos Wealth Management LLC: 9,325 shares

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

  2. period ended2026-03-31
    13F 591,011 shares
    Change vs previous 13F +13,325 shares

    0.15% of the 13F portfolio, value $43,013,781.

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

    • Calamos Advisors LLC: 580,346 shares
    • Calamos Wealth Management LLC: 10,665 shares

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

  3. period ended2025-12-31
    13F 577,686 shares
    Change vs previous 13F -6,722 shares

    0.13% of the 13F portfolio, value $34,724,705.

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

    • Calamos Advisors LLC: 567,209 shares
    • Calamos Wealth Management LLC: 10,477 shares

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

  4. period ended2025-09-30
    13F 584,408 shares
    Change vs previous 13F +1,571 shares

    0.13% of the 13F portfolio, value $37,022,246.

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

    • Calamos Advisors LLC: 576,027 shares
    • Calamos Wealth Management LLC: 8,381 shares

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

  5. period ended2025-06-30
    13F 582,837 shares
    Change vs previous 13F +71,924 shares

    0.14% of the 13F portfolio, value $36,607,992.

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

    • Calamos Advisors LLC: 574,365 shares
    • Calamos Wealth Management LLC: 8,472 shares

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

  6. period ended2025-03-31
    13F 510,913 shares
    Change vs previous 13F +110,831 shares

    0.14% of the 13F portfolio, value $30,532,161.

    13F-HR 0001085146-25-002415 filed by Calamos 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 400,082 shares
    Change vs previous 13F +144,953 shares

    0.1% of the 13F portfolio, value $21,652,438.

    13F-HR 0001085146-25-000482 filed by Calamos 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 255,129 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $11,646,639.

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

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