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Disclosery

GAMMA Investing LLC: BIIB position timeline

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

GAMMA Investing LLC held 6,832 BIIB shares at 2026-09-30 per its 13F-HR filed 2026-10-08.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 6,832 shares
    Change vs previous 13F +370 shares

    0.05% of the 13F portfolio, value $1,543,212.

    13F-HR 0002010235-26-000007 filed by GAMMA Investing LLC
    Accepted , ingested

  2. period ended2026-06-30
    13F 6,462 shares
    Change vs previous 13F +469 shares

    0.05% of the 13F portfolio, value $1,396,180.

    13F-HR 0002010235-26-000005 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 5,993 shares
    Change vs previous 13F +477 shares

    0.05% of the 13F portfolio, value $1,098,697.

    13F-HR 0002010235-26-000003 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 5,516 shares
    Change vs previous 13F +1,173 shares

    0.05% of the 13F portfolio, value $970,761.

    13F-HR 0002010235-26-000001 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-09-30
    13F 4,343 shares
    Change vs previous 13F +756 shares

    0.03% of the 13F portfolio, value $608,367.

    13F-HR 0002010235-25-000009 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-06-30
    13F 3,587 shares
    Change vs previous 13F +1,725 shares

    0.03% of the 13F portfolio, value $450,491.

    13F-HR 0002010235-25-000007 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2025-03-31
    13F/A 1,862 shares
    Change vs previous 13F +1,464 shares

    0.02% of the 13F portfolio, value $254,796.

    13F-HR/A 0002010235-25-000006 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-12-31
    13F 398 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $60,862.

    13F-HR 0002010235-25-000001 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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