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Calamos Advisors LLC: MCO position timeline

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

Calamos Advisors LLC held 24,028 MCO 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 24,028 shares
    Change vs previous 13F -24,364 shares

    0.33% of the 13F portfolio, value $10,882,762.

    13F-HR 0001455258-26-000003 filed by Calamos Wealth Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Calamos Advisors LLC: 0 shares
    • Calamos Wealth Management LLC: 24,028 shares

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

  2. period ended2026-03-31
    13F 48,392 shares
    Change vs previous 13F +27,696 shares

    0.07% of the 13F portfolio, value $21,111,010.

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

    • Calamos Advisors LLC: 24,196 shares
    • Calamos Wealth Management LLC: 24,196 shares

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

  3. period ended2025-12-31
    13F 20,696 shares
    Change vs previous 13F +342 shares

    0.37% of the 13F portfolio, value $10,572,552.

    13F-HR 0001455258-26-000001 filed by Calamos Wealth Management 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 20,354 shares
    Change vs previous 13F +21 shares

    0.35% of the 13F portfolio, value $9,698,274.

    13F-HR 0001455258-25-000002 filed by Calamos Wealth Management 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 20,333 shares
    Change vs previous 13F +82 shares

    0.43% of the 13F portfolio, value $10,198,829.

    13F-HR 0001085146-25-004252 filed by Calamos Wealth Management 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 20,251 shares
    Change vs previous 13F +9 shares

    0.47% of the 13F portfolio, value $9,430,688.

    13F-HR 0001085146-25-002416 filed by Calamos Wealth Management 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 20,242 shares
    Change vs previous 13F not available

    0.48% of the 13F portfolio, value $9,581,956.

    13F-HR 0001085146-25-000483 filed by Calamos Wealth Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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