Avidity Partners Management LP: GMAB position timeline

Avidity Partners Management LP held 50,000 GMAB 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 50,000 shares

   Change vs previous 13F 0 shares

   0.22% of the 13F portfolio, value $1,373,500.

   13F-HR 0001791827-26-000005 filed by Avidity Partners Management LP
   Filed 2026-08-14 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC

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

2. period ended2026-03-31

   13F/A 50,000 shares

   Change vs previous 13F -42,000 shares

   0.27% of the 13F portfolio, value $1,341,500.

   13F-HR/A 0001791827-26-000004 filed by Avidity Partners Management LP
   Filed 2026-05-28 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC

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

3. period ended2025-12-31

   13F 92,000 shares

   Change vs previous 13F -156,100 shares

   0.82% of the 13F portfolio, value $2,833,600.

   13F-HR 0001791827-26-000002 filed by Avidity Partners Management LP
   Filed 2026-02-13 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC

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

4. period ended2025-09-30

   13F 248,100 shares

   Change vs previous 13F -401,900 shares

   1.73% of the 13F portfolio, value $7,609,227.

   13F-HR 0001791827-25-000008 filed by Avidity Partners Management LP
   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).

5. period ended2025-06-30

   13F 650,000 shares

   Change vs previous 13F not available

   2.69% of the 13F portfolio, value $13,429,000.

   13F-HR 0001791827-25-000007 filed by Avidity Partners Management LP
   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).