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Calamos Advisors LLC: BSX position timeline

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

Calamos Advisors LLC held 684,584 BSX 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 684,584 shares
    Change vs previous 13F -150,466 shares

    0.09% of the 13F portfolio, value $29,218,046.

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

    • Calamos Advisors LLC: 677,114 shares
    • Calamos Wealth Management LLC: 7,470 shares

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

  2. period ended2026-03-31
    13F 835,050 shares
    Change vs previous 13F -153,821 shares

    0.18% of the 13F portfolio, value $52,399,388.

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

    • Calamos Advisors LLC: 817,686 shares
    • Calamos Wealth Management LLC: 17,364 shares

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

  3. period ended2025-12-31
    13F 988,871 shares
    Change vs previous 13F -60,597 shares

    0.35% of the 13F portfolio, value $94,288,850.

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

    • Calamos Advisors LLC: 871,657 shares
    • Calamos Wealth Management LLC: 117,214 shares

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

  4. period ended2025-09-30
    13F 1,049,468 shares
    Change vs previous 13F -52,597 shares

    0.37% of the 13F portfolio, value $102,459,561.

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

    • Calamos Advisors LLC: 894,430 shares
    • Calamos Wealth Management LLC: 155,038 shares

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

  5. period ended2025-06-30
    13F 1,102,065 shares
    Change vs previous 13F +33,175 shares

    0.46% of the 13F portfolio, value $118,372,801.

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

    • Calamos Advisors LLC: 1,000,279 shares
    • Calamos Wealth Management LLC: 101,786 shares

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

  6. period ended2025-03-31
    13F 1,068,890 shares
    Change vs previous 13F -113,599 shares

    0.47% of the 13F portfolio, value $107,829,623.

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

    • Calamos Advisors LLC: 969,968 shares
    • Calamos Wealth Management LLC: 98,922 shares

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

  7. period ended2024-12-31
    13F 1,182,489 shares
    Change vs previous 13F +5,381 shares

    0.45% of the 13F portfolio, value $105,619,917.

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

    • Calamos Advisors LLC: 1,027,057 shares
    • Calamos Wealth Management LLC: 155,432 shares

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

  8. period ended2024-09-30
    13F 1,177,108 shares
    Change vs previous 13F not available

    0.42% of the 13F portfolio, value $98,641,650.

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

    • Calamos Advisors LLC: 1,022,548 shares
    • Calamos Wealth Management LLC: 154,560 shares

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