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Calamos Advisors LLC: ZTS position timeline

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

Calamos Advisors LLC held 114,273 ZTS 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 114,273 shares
    Change vs previous 13F -6,784 shares

    0.03% of the 13F portfolio, value $8,211,658.

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

    • Calamos Advisors LLC: 114,273 shares
    • Calamos Wealth Management LLC: 0 shares

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

  2. period ended2026-03-31
    13F 121,057 shares
    Change vs previous 13F +2,170 shares

    0.05% of the 13F portfolio, value $14,310,148.

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

    • Calamos Advisors LLC: 118,858 shares
    • Calamos Wealth Management LLC: 2,199 shares

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

  3. period ended2025-12-31
    13F 118,887 shares
    Change vs previous 13F -4,941 shares

    0.05% of the 13F portfolio, value $14,958,396.

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

    • Calamos Advisors LLC: 116,688 shares
    • Calamos Wealth Management LLC: 2,199 shares

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

  4. period ended2025-09-30
    13F 123,828 shares
    Change vs previous 13F -87,165 shares

    0.07% of the 13F portfolio, value $18,118,552.

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

    • Calamos Advisors LLC: 121,414 shares
    • Calamos Wealth Management LLC: 2,414 shares

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

  5. period ended2025-06-30
    13F 210,993 shares
    Change vs previous 13F +1,586 shares

    0.13% of the 13F portfolio, value $32,904,419.

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

    • Calamos Advisors LLC: 123,846 shares
    • Calamos Wealth Management LLC: 87,147 shares

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

  6. period ended2025-03-31
    13F 209,407 shares
    Change vs previous 13F -85,508 shares

    0.15% of the 13F portfolio, value $34,478,921.

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

    • Calamos Advisors LLC: 123,729 shares
    • Calamos Wealth Management LLC: 85,678 shares

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

  7. period ended2024-12-31
    13F 294,915 shares
    Change vs previous 13F +42,147 shares

    0.2% of the 13F portfolio, value $48,050,431.

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

    • Calamos Advisors LLC: 210,885 shares
    • Calamos Wealth Management LLC: 84,030 shares

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

  8. period ended2024-09-30
    13F 252,768 shares
    Change vs previous 13F not available

    0.21% of the 13F portfolio, value $49,385,889.

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

    • Calamos Advisors LLC: 183,306 shares
    • Calamos Wealth Management LLC: 69,462 shares

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