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

RA CAPITAL MANAGEMENT, L.P. held 0 MBX shares at 2025-09-30 per its 13F-HR filed 2025-11-14.

the latest 13F is the newest step

1. period ended2025-09-30

   13F 0 shares

   Change vs previous 13F -377,841 shares

   13F-HR 0001104659-25-112469 filed by RA CAPITAL MANAGEMENT, L.P.
   Filed 2025-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC

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

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

2. period ended2025-06-30

   13F 377,841 shares

   Change vs previous 13F -1,133,493 shares

   0.07% of the 13F portfolio, value $4,311,166.

   13F-HR 0001104659-25-078691 filed by RA CAPITAL MANAGEMENT, L.P.
   Filed 2025-08-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC

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

3. period ended2025-03-31

   13F 1,511,334 shares

   Change vs previous 13F 0 shares

   0.19% of the 13F portfolio, value $11,153,645.

   13F-HR 0001104659-25-049549 filed by RA CAPITAL MANAGEMENT, L.P.
   Filed 2025-05-15 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC

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

4. period ended2024-12-31

   13F 1,511,334 shares

   Change vs previous 13F 0 shares

   0.37% of the 13F portfolio, value $27,853,886.

   13F-HR 0001104659-25-014181 filed by RA CAPITAL MANAGEMENT, L.P.
   Filed 2025-02-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC

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

5. period ended2024-09-30

   13F 1,511,334 shares

   Change vs previous 13F not available

   0.45% of the 13F portfolio, value $39,264,457.

   13F-HR 0001104659-24-119034 filed by RA CAPITAL MANAGEMENT, L.P.
   Filed 2024-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC

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