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Avidity Partners Management LP: KPTI position timeline

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

Avidity Partners Management LP held 924,487 KPTI 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 924,487 shares
    Change vs previous 13F +460,746 shares

    1.45% of the 13F portfolio, value $9,032,238.

    13F-HR 0001791827-26-000005 filed by Avidity Partners 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/A 463,741 shares
    Change vs previous 13F +329,175 shares

    0.52% of the 13F portfolio, value $2,583,037.

    13F-HR/A 0001791827-26-000004 filed by Avidity Partners 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 134,566 shares
    Change vs previous 13F 0 shares

    0.29% of the 13F portfolio, value $990,406.

    13F-HR 0001791827-26-000002 filed by Avidity Partners 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 134,566 shares
    Change vs previous 13F 0 shares

    0.2% of the 13F portfolio, value $880,062.

    13F-HR 0001791827-25-000008 filed by Avidity Partners 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 134,566 shares
    Change vs previous 13F 0 shares

    0.12% of the 13F portfolio, value $579,979.

    13F-HR 0001791827-25-000007 filed by Avidity Partners 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 134,566 shares
    Change vs previous 13F not available

    0.1% of the 13F portfolio, value $503,277.

    13F-HR 0001791827-25-000005 filed by Avidity Partners Management LP
    Filed (acceptance time not in the bulk data set), ingested

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