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RA CAPITAL MANAGEMENT, L.P.: ASMB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of RA CAPITAL MANAGEMENT, L.P. on ASMB, newest first. How the timeline and the estimate are built.

RA CAPITAL MANAGEMENT, L.P. held 1,020,410 ASMB 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 1,020,410 shares
    Change vs previous 13F 0 shares

    0.24% of the 13F portfolio, value $28,040,867.

    13F-HR 0001104659-26-097251 filed by RA 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).

  2. period ended2026-03-31
    13F 1,020,410 shares
    Change vs previous 13F 0 shares

    0.3% of the 13F portfolio, value $28,316,378.

    13F-HR 0001104659-26-062637 filed by RA 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 1,020,410 shares
    Change vs previous 13F 0 shares

    0.36% of the 13F portfolio, value $34,704,144.

    13F-HR 0001104659-26-016482 filed by RA 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).

  4. period ended2025-09-30
    13F 1,020,410 shares
    Change vs previous 13F not available

    0.32% of the 13F portfolio, value $26,122,496.

    13F-HR 0001104659-25-112469 filed by RA 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).