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Defilade Capital Management, L.P.: BIIB position timeline

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

Defilade Capital Management, L.P. held 0 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 0 shares
    Change vs previous 13F -96,289 shares

    13F-HR 0002088557-26-000008 filed by Defilade Capital Management, L.P.
    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.

  2. period ended2026-03-31
    13F/A 96,289 shares
    Change vs previous 13F -65,703 shares

    2.48% of the 13F portfolio, value $17,652,662.

    13F-HR/A 0002088557-26-000006 filed by Defilade Capital Management, L.P.
    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 161,992 shares
    Change vs previous 13F not available

    3.86% of the 13F portfolio, value $28,508,972.

    13F-HR 0002088557-26-000002 filed by Defilade Capital Management, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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