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

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

RA CAPITAL MANAGEMENT, L.P. held 7,692,750 MLYS 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 7,692,750 shares
    Change vs previous 13F 0 shares

    1.8% of the 13F portfolio, value $207,550,395.

    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 7,692,750 shares
    Change vs previous 13F +369,000 shares

    2.21% of the 13F portfolio, value $208,396,598.

    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 7,323,750 shares
    Change vs previous 13F 0 shares

    2.72% of the 13F portfolio, value $265,778,888.

    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 7,323,750 shares
    Change vs previous 13F +1,176,470 shares

    3.42% of the 13F portfolio, value $277,716,600.

    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).

  5. period ended2025-06-30
    13F 6,147,280 shares
    Change vs previous 13F 0 shares

    1.4% of the 13F portfolio, value $83,172,698.

    13F-HR 0001104659-25-078691 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).

  6. period ended2025-03-31
    13F 6,147,280 shares
    Change vs previous 13F +1,296,296 shares

    1.63% of the 13F portfolio, value $97,618,806.

    13F-HR 0001104659-25-049549 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).

  7. period ended2024-12-31
    13F 4,850,984 shares
    Change vs previous 13F 0 shares

    0.79% of the 13F portfolio, value $59,715,613.

    13F-HR 0001104659-25-014181 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).

  8. period ended2024-09-30
    13F 4,850,984 shares
    Change vs previous 13F not available

    0.68% of the 13F portfolio, value $58,745,416.

    13F-HR 0001104659-24-119034 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).