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Calamos Advisors LLC: COST position timeline

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

Calamos Advisors LLC held 89,899 COST 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 89,899 shares
    Change vs previous 13F -10,806 shares

    0.27% of the 13F portfolio, value $84,097,820.

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

    • Calamos Advisors LLC: 80,404 shares
    • Calamos Wealth Management LLC: 9,495 shares

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

  2. period ended2026-03-31
    13F 100,705 shares
    Change vs previous 13F +4,048 shares

    0.35% of the 13F portfolio, value $100,345,484.

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

    • Calamos Advisors LLC: 91,006 shares
    • Calamos Wealth Management LLC: 9,699 shares

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

  3. period ended2025-12-31
    13F 96,657 shares
    Change vs previous 13F -7,199 shares

    0.31% of the 13F portfolio, value $83,351,520.

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

    • Calamos Advisors LLC: 88,093 shares
    • Calamos Wealth Management LLC: 8,564 shares

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

  4. period ended2025-09-30
    13F 103,856 shares
    Change vs previous 13F -8,038 shares

    0.35% of the 13F portfolio, value $96,132,454.

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

    • Calamos Advisors LLC: 95,630 shares
    • Calamos Wealth Management LLC: 8,226 shares

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

  5. period ended2025-06-30
    13F 111,894 shares
    Change vs previous 13F +44 shares

    0.43% of the 13F portfolio, value $110,768,465.

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

    • Calamos Advisors LLC: 105,334 shares
    • Calamos Wealth Management LLC: 6,560 shares

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

  6. period ended2025-03-31
    13F 111,850 shares
    Change vs previous 13F -3,127 shares

    0.46% of the 13F portfolio, value $105,785,493.

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

    • Calamos Advisors LLC: 105,287 shares
    • Calamos Wealth Management LLC: 6,563 shares

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

  7. period ended2024-12-31
    13F 114,977 shares
    Change vs previous 13F -39 shares

    0.44% of the 13F portfolio, value $105,349,544.

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

    • Calamos Advisors LLC: 107,588 shares
    • Calamos Wealth Management LLC: 7,389 shares

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

  8. period ended2024-09-30
    13F 115,016 shares
    Change vs previous 13F not available

    0.44% of the 13F portfolio, value $101,964,350.

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

    • Calamos Advisors LLC: 107,747 shares
    • Calamos Wealth Management LLC: 7,269 shares

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