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Disclosery

Hudson Bay Capital Management LP: IONS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Hudson Bay Capital Management LP on IONS, newest first. How the timeline and the estimate are built.

Hudson Bay Capital Management LP held 145,000 IONS shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 145,000 shares
    Change vs previous 13F -150,100 shares

    0.05% of the 13F portfolio, value $11,497,050.

    13F-HR 0001393825-26-000058 filed by Hudson Bay Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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

  2. period ended2026-03-31
    13F 295,100 shares
    Change vs previous 13F -179,900 shares

    0.13% of the 13F portfolio, value $22,159,059.

    13F-HR 0001393825-26-000041 filed by Hudson Bay Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-12-31
    13F 475,000 shares
    Change vs previous 13F -40,000 shares

    0.22% of the 13F portfolio, value $37,577,250.

    13F-HR 0001393825-26-000021 filed by Hudson Bay Capital Management LP
    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/A 515,000 shares
    Change vs previous 13F -235,000 shares

    0.2% of the 13F portfolio, value $33,691,300.

    13F-HR/A 0001393825-25-000093 filed by Hudson Bay Capital Management LP
    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/A 750,000 shares
    Change vs previous 13F -299,900 shares

    0.19% of the 13F portfolio, value $29,632,500.

    13F-HR/A 0001393825-25-000066 filed by Hudson Bay Capital Management LP
    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 1,049,900 shares
    Change vs previous 13F +228,700 shares

    0.2% of the 13F portfolio, value $31,675,483.

    13F-HR 0001393825-25-000010 filed by Hudson Bay Capital Management LP
    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 821,200 shares
    Change vs previous 13F +54,300 shares

    0.17% of the 13F portfolio, value $28,709,152.

    13F-HR 0002033916-25-000027 filed by Hudson Bay Capital Management LP
    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 766,900 shares
    Change vs previous 13F not available

    0.21% of the 13F portfolio, value $30,722,014.

    13F-HR 0002033916-24-000083 filed by Hudson Bay Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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