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Disclosery

Sarissa Capital Management LP: BIIB position timeline

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

Sarissa Capital Management LP held 950 BIIB 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 950 shares
    Change vs previous 13F +950 shares

    0.12% of the 13F portfolio, value $205,257.

    13F-HR 0000899140-26-000879 filed by Sarissa 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 ended2024-12-31
    13F 0 shares
    Change vs previous 13F -26,950 shares

    13F-HR 0000899140-25-000321 filed by Sarissa Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  3. period ended2024-09-30
    13F 26,950 shares
    Change vs previous 13F not available

    1.3% of the 13F portfolio, value $5,223,988.

    13F-HR 0000899140-24-001252 filed by Sarissa Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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