Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Issuer	Date	Time CEST	Price (DKK)	Quantity	Venue
Genmab A/S	21/05/2024	09:28:05	2,026.0000	39	XCSE
Genmab A/S	21/05/2024	09:28:05	2,025.0000	38	CEUX
Genmab A/S	21/05/2024	09:28:05	2,025.0000	2	CEUX
Genmab A/S	21/05/2024	09:37:02	2,020.0000	6	XCSE
Genmab A/S	21/05/2024	09:37:02	2,020.0000	29	XCSE
Genmab A/S	21/05/2024	09:39:27	2,019.0000	35	AQEU
Genmab A/S	21/05/2024	09:41:58	2,017.0000	36	CEUX
Genmab A/S	21/05/2024	09:41:58	2,017.0000	3	AQEU
Genmab A/S	21/05/2024	09:46:53	2,016.0000	34	XCSE
Genmab A/S	21/05/2024	09:46:54	2,015.0000	35	XCSE
Genmab A/S	21/05/2024	09:54:00	2,015.0000	37	CEUX
Genmab A/S	21/05/2024	09:56:01	2,013.0000	37	CEUX
Genmab A/S	21/05/2024	10:05:09	2,014.0000	34	XCSE
Genmab A/S	21/05/2024	10:05:09	2,014.0000	36	CEUX
Genmab A/S	21/05/2024	10:06:49	2,012.0000	39	XCSE
Genmab A/S	21/05/2024	10:12:24	2,010.0000	36	XCSE
Genmab A/S	21/05/2024	10:23:09	2,010.0000	35	XCSE
Genmab A/S	21/05/2024	10:23:09	2,010.0000	8	XCSE
Genmab A/S	21/05/2024	10:25:40	2,010.0000	3	CEUX
Genmab A/S	21/05/2024	10:25:40	2,010.0000	35	CEUX
Genmab A/S	21/05/2024	10:30:31	2,010.0000	35	XCSE
Genmab A/S	21/05/2024	10:36:30	2,010.0000	8	CEUX
Genmab A/S	21/05/2024	10:36:30	2,010.0000	28	CEUX
Genmab A/S	21/05/2024	10:40:04	2,012.0000	43	CEUX
Genmab A/S	21/05/2024	10:46:02	2,011.0000	38	XCSE
Genmab A/S	21/05/2024	10:51:25	2,010.0000	21	CEUX
Genmab A/S	21/05/2024	10:51:25	2,010.0000	7	CEUX
Genmab A/S	21/05/2024	10:51:25	2,010.0000	6	CEUX
Genmab A/S	21/05/2024	10:59:42	2,009.0000	77	XCSE
Genmab A/S	21/05/2024	10:59:42	2,009.0000	50	CEUX
Genmab A/S	21/05/2024	10:59:42	2,009.0000	19	CEUX
Genmab A/S	21/05/2024	10:59:42	2,009.0000	10	AQEU
Genmab A/S	21/05/2024	10:59:42	2,009.0000	11	TQEX
Genmab A/S	21/05/2024	11:03:57	2,010.0000	22	XCSE
Genmab A/S	21/05/2024	11:03:57	2,010.0000	22	XCSE
Genmab A/S	21/05/2024	11:03:57	2,010.0000	65	XCSE
Genmab A/S	21/05/2024	11:08:20	2,009.0000	2	TQEX
Genmab A/S	21/05/2024	11:08:20	2,009.0000	59	TQEX

1

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	11:08:21	2,009.0000	69	XCSE
Genmab A/S	21/05/2024	11:08:21	2,009.0000	8	TQEX
Genmab A/S	21/05/2024	11:12:25	2,008.0000	20	CEUX
Genmab A/S	21/05/2024	11:12:25	2,008.0000	46	CEUX
Genmab A/S	21/05/2024	11:12:25	2,008.0000	23	XCSE
Genmab A/S	21/05/2024	11:12:25	2,008.0000	1	XCSE
Genmab A/S	21/05/2024	11:12:25	2,008.0000	1	XCSE
Genmab A/S	21/05/2024	11:12:25	2,008.0000	1	XCSE
Genmab A/S	21/05/2024	11:12:27	2,008.0000	14	XCSE
Genmab A/S	21/05/2024	11:12:27	2,008.0000	23	XCSE
Genmab A/S	21/05/2024	11:17:10	2,007.0000	8	AQEU
Genmab A/S	21/05/2024	11:19:39	2,008.0000	48	CEUX
Genmab A/S	21/05/2024	11:19:39	2,008.0000	7	AQEU
Genmab A/S	21/05/2024	11:19:39	2,008.0000	5	TQEX
Genmab A/S	21/05/2024	11:19:39	2,008.0000	2	TQEX
Genmab A/S	21/05/2024	11:19:39	2,008.0000	46	XCSE
Genmab A/S	21/05/2024	11:19:39	2,008.0000	1	XCSE
Genmab A/S	21/05/2024	11:19:39	2,008.0000	1	XCSE
Genmab A/S	21/05/2024	11:19:39	2,008.0000	5	TQEX
Genmab A/S	21/05/2024	11:21:07	2,007.0000	14	CEUX
Genmab A/S	21/05/2024	11:21:07	2,007.0000	15	CEUX
Genmab A/S	21/05/2024	11:21:07	2,007.0000	1	XCSE
Genmab A/S	21/05/2024	11:21:07	2,007.0000	44	XCSE
Genmab A/S	21/05/2024	11:21:07	2,007.0000	10	CEUX
Genmab A/S	21/05/2024	11:21:07	2,007.0000	5	TQEX
Genmab A/S	21/05/2024	11:21:07	2,007.0000	1	CEUX
Genmab A/S	21/05/2024	11:27:13	2,007.0000	55	XCSE
Genmab A/S	21/05/2024	11:29:17	2,007.0000	57	XCSE
Genmab A/S	21/05/2024	11:29:17	2,007.0000	50	CEUX
Genmab A/S	21/05/2024	11:29:17	2,007.0000	2	CEUX
Genmab A/S	21/05/2024	11:29:17	2,007.0000	8	AQEU
Genmab A/S	21/05/2024	11:29:17	2,007.0000	8	TQEX
Genmab A/S	21/05/2024	11:32:26	2,009.0000	1	CEUX
Genmab A/S	21/05/2024	11:32:26	2,009.0000	50	CEUX
Genmab A/S	21/05/2024	11:32:26	2,009.0000	2	CEUX
Genmab A/S	21/05/2024	11:37:06	2,006.0000	40	CEUX
Genmab A/S	21/05/2024	11:37:06	2,006.0000	13	CEUX
Genmab A/S	21/05/2024	11:42:48	2,006.0000	35	CEUX
Genmab A/S	21/05/2024	11:42:48	2,006.0000	1	CEUX
Genmab A/S	21/05/2024	11:44:26	2,006.0000	37	CEUX

2

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	11:44:26	2,006.0000	3	CEUX
Genmab A/S	21/05/2024	11:47:55	2,010.0000	8	TQEX
Genmab A/S	21/05/2024	11:47:55	2,010.0000	50	TQEX
Genmab A/S	21/05/2024	11:47:55	2,010.0000	23	TQEX
Genmab A/S	21/05/2024	11:47:55	2,010.0000	1	TQEX
Genmab A/S	21/05/2024	11:49:49	2,013.0000	10	CEUX
Genmab A/S	21/05/2024	11:50:06	2,012.0000	8	XCSE
Genmab A/S	21/05/2024	11:50:06	2,012.0000	8	XCSE
Genmab A/S	21/05/2024	11:50:06	2,012.0000	35	XCSE
Genmab A/S	21/05/2024	11:52:18	2,014.0000	8	XCSE
Genmab A/S	21/05/2024	11:52:18	2,014.0000	32	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	9	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	1	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	8	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	4	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	6	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	4	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	10	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	10	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	10	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	1	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	1	AQEU
Genmab A/S	21/05/2024	11:53:11	2,015.0000	8	AQEU
Genmab A/S	21/05/2024	11:53:11	2,015.0000	2	TQEX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	11	TQEX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	4	TQEX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	3	TQEX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	9	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	9	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	9	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	5	XCSE
Genmab A/S	21/05/2024	11:53:11	2,015.0000	25	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	25	CEUX
Genmab A/S	21/05/2024	11:53:11	2,015.0000	1	CEUX
Genmab A/S	21/05/2024	11:53:28	2,014.0000	22	XCSE
Genmab A/S	21/05/2024	11:53:28	2,014.0000	22	XCSE
Genmab A/S	21/05/2024	11:53:28	2,014.0000	6	XCSE
Genmab A/S	21/05/2024	11:58:13	2,013.0000	53	CEUX
Genmab A/S	21/05/2024	12:02:16	2,012.0000	56	XCSE
Genmab A/S	21/05/2024	12:07:34	2,012.0000	9	AQEU

3

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	12:07:34	2,012.0000	45	CEUX
Genmab A/S	21/05/2024	12:07:34	2,012.0000	17	CEUX
Genmab A/S	21/05/2024	12:07:34	2,012.0000	10	TQEX
Genmab A/S	21/05/2024	12:07:34	2,012.0000	67	XCSE
Genmab A/S	21/05/2024	12:07:34	2,012.0000	2	XCSE
Genmab A/S	21/05/2024	12:07:57	2,011.0000	53	XCSE
Genmab A/S	21/05/2024	12:09:32	2,010.0000	47	CEUX
Genmab A/S	21/05/2024	12:15:26	2,008.0000	51	CEUX
Genmab A/S	21/05/2024	12:21:42	2,009.0000	13	XCSE
Genmab A/S	21/05/2024	12:21:42	2,009.0000	30	XCSE
Genmab A/S	21/05/2024	12:21:42	2,009.0000	39	CEUX
Genmab A/S	21/05/2024	12:21:42	2,009.0000	6	AQEU
Genmab A/S	21/05/2024	12:21:42	2,009.0000	6	TQEX
Genmab A/S	21/05/2024	12:22:52	2,009.0000	31	CEUX
Genmab A/S	21/05/2024	12:22:52	2,009.0000	59	CEUX
Genmab A/S	21/05/2024	12:29:27	2,008.0000	24	XCSE
Genmab A/S	21/05/2024	12:31:04	2,009.0000	47	CEUX
Genmab A/S	21/05/2024	12:31:04	2,009.0000	9	AQEU
Genmab A/S	21/05/2024	12:31:04	2,009.0000	10	TQEX
Genmab A/S	21/05/2024	12:31:33	2,009.0000	10	XCSE
Genmab A/S	21/05/2024	12:31:33	2,009.0000	60	XCSE
Genmab A/S	21/05/2024	12:31:33	2,009.0000	15	CEUX
Genmab A/S	21/05/2024	12:31:37	2,007.0000	43	XCSE
Genmab A/S	21/05/2024	12:31:37	2,007.0000	9	XCSE
Genmab A/S	21/05/2024	12:39:02	2,007.0000	19	CEUX
Genmab A/S	21/05/2024	12:39:02	2,007.0000	36	CEUX
Genmab A/S	21/05/2024	12:39:03	2,007.0000	50	XCSE
Genmab A/S	21/05/2024	12:39:07	2,006.0000	16	XCSE
Genmab A/S	21/05/2024	12:39:07	2,006.0000	39	XCSE
Genmab A/S	21/05/2024	12:45:23	2,008.0000	42	XCSE
Genmab A/S	21/05/2024	12:45:23	2,008.0000	22	XCSE
Genmab A/S	21/05/2024	12:45:25	2,008.0000	11	XCSE
Genmab A/S	21/05/2024	12:45:31	2,008.0000	17	XCSE
Genmab A/S	21/05/2024	12:50:03	2,009.0000	42	CEUX
Genmab A/S	21/05/2024	12:50:03	2,009.0000	6	AQEU
Genmab A/S	21/05/2024	12:50:03	2,009.0000	7	TQEX
Genmab A/S	21/05/2024	12:50:03	2,009.0000	36	XCSE
Genmab A/S	21/05/2024	12:50:03	2,009.0000	10	XCSE
Genmab A/S	21/05/2024	12:50:03	2,009.0000	25	XCSE
Genmab A/S	21/05/2024	12:50:03	2,009.0000	18	XCSE

4

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	12:50:03	2,009.0000	1	XCSE
Genmab A/S	21/05/2024	12:50:03	2,009.0000	6	XCSE
Genmab A/S	21/05/2024	12:59:53	2,008.0000	36	CEUX
Genmab A/S	21/05/2024	12:59:53	2,008.0000	1	AQEU
Genmab A/S	21/05/2024	13:01:32	2,008.0000	2	CEUX
Genmab A/S	21/05/2024	13:01:32	2,008.0000	14	CEUX
Genmab A/S	21/05/2024	13:01:32	2,008.0000	20	CEUX
Genmab A/S	21/05/2024	13:01:49	2,007.0000	42	CEUX
Genmab A/S	21/05/2024	13:01:49	2,007.0000	45	CEUX
Genmab A/S	21/05/2024	13:01:49	2,007.0000	4	TQEX
Genmab A/S	21/05/2024	13:01:49	2,007.0000	30	XCSE
Genmab A/S	21/05/2024	13:01:49	2,007.0000	1	XCSE
Genmab A/S	21/05/2024	13:04:01	2,007.0000	24	CEUX
Genmab A/S	21/05/2024	13:04:01	2,007.0000	46	CEUX
Genmab A/S	21/05/2024	13:04:01	2,007.0000	39	XCSE
Genmab A/S	21/05/2024	13:04:01	2,007.0000	7	XCSE
Genmab A/S	21/05/2024	13:10:43	2,007.0000	20	XCSE
Genmab A/S	21/05/2024	13:17:11	2,019.0000	36	CEUX
Genmab A/S	21/05/2024	13:17:11	2,019.0000	20	CEUX
Genmab A/S	21/05/2024	13:17:11	2,019.0000	23	AQEU
Genmab A/S	21/05/2024	13:17:11	2,019.0000	1	TQEX
Genmab A/S	21/05/2024	13:17:30	2,017.0000	49	XCSE
Genmab A/S	21/05/2024	13:17:31	2,017.0000	48	CEUX
Genmab A/S	21/05/2024	13:18:30	2,017.0000	53	XCSE
Genmab A/S	21/05/2024	13:18:30	2,016.0000	29	CEUX
Genmab A/S	21/05/2024	13:18:30	2,016.0000	25	CEUX
Genmab A/S	21/05/2024	13:27:33	2,016.0000	63	XCSE
Genmab A/S	21/05/2024	13:27:33	2,016.0000	1	CEUX
Genmab A/S	21/05/2024	13:27:33	2,016.0000	50	CEUX
Genmab A/S	21/05/2024	13:27:33	2,016.0000	5	CEUX
Genmab A/S	21/05/2024	13:27:33	2,016.0000	8	AQEU
Genmab A/S	21/05/2024	13:27:33	2,016.0000	9	TQEX
Genmab A/S	21/05/2024	13:27:33	2,015.0000	48	XCSE
Genmab A/S	21/05/2024	13:36:55	2,017.0000	5	CEUX
Genmab A/S	21/05/2024	13:36:55	2,017.0000	30	XCSE
Genmab A/S	21/05/2024	13:39:05	2,018.0000	35	CEUX
Genmab A/S	21/05/2024	13:39:59	2,017.0000	33	XCSE
Genmab A/S	21/05/2024	13:39:59	2,017.0000	3	XCSE
Genmab A/S	21/05/2024	13:39:59	2,017.0000	68	XCSE
Genmab A/S	21/05/2024	13:39:59	2,017.0000	62	CEUX

5

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	13:39:59	2,017.0000	9	AQEU
Genmab A/S	21/05/2024	13:39:59	2,017.0000	9	TQEX
Genmab A/S	21/05/2024	13:45:15	2,018.0000	11	CEUX
Genmab A/S	21/05/2024	13:45:15	2,018.0000	38	CEUX
Genmab A/S	21/05/2024	13:45:15	2,018.0000	53	XCSE
Genmab A/S	21/05/2024	13:45:15	2,018.0000	7	CEUX
Genmab A/S	21/05/2024	13:47:45	2,017.0000	51	CEUX
Genmab A/S	21/05/2024	13:47:45	2,017.0000	25	CEUX
Genmab A/S	21/05/2024	13:47:45	2,017.0000	3	CEUX
Genmab A/S	21/05/2024	13:47:45	2,017.0000	20	CEUX
Genmab A/S	21/05/2024	13:58:28	2,018.0000	41	XCSE
Genmab A/S	21/05/2024	14:00:16	2,018.0000	7	XCSE
Genmab A/S	21/05/2024	14:00:16	2,018.0000	59	XCSE
Genmab A/S	21/05/2024	14:01:15	2,018.0000	51	XCSE
Genmab A/S	21/05/2024	14:04:29	2,019.0000	18	XCSE
Genmab A/S	21/05/2024	14:04:29	2,019.0000	44	XCSE
Genmab A/S	21/05/2024	14:04:29	2,019.0000	43	CEUX
Genmab A/S	21/05/2024	14:09:08	2,019.0000	18	XCSE
Genmab A/S	21/05/2024	14:09:08	2,019.0000	7	XCSE
Genmab A/S	21/05/2024	14:09:15	2,019.0000	14	TQEX
Genmab A/S	21/05/2024	14:11:02	2,020.0000	19	CEUX
Genmab A/S	21/05/2024	14:12:48	2,021.0000	59	CEUX
Genmab A/S	21/05/2024	14:12:48	2,021.0000	9	AQEU
Genmab A/S	21/05/2024	14:12:48	2,021.0000	9	TQEX
Genmab A/S	21/05/2024	14:12:48	2,021.0000	65	XCSE
Genmab A/S	21/05/2024	14:20:13	2,017.0000	45	CEUX
Genmab A/S	21/05/2024	14:20:13	2,017.0000	39	XCSE
Genmab A/S	21/05/2024	14:20:13	2,017.0000	8	XCSE
Genmab A/S	21/05/2024	14:20:13	2,017.0000	42	XCSE
Genmab A/S	21/05/2024	14:20:13	2,017.0000	4	XCSE
Genmab A/S	21/05/2024	14:29:16	2,016.0000	32	XCSE
Genmab A/S	21/05/2024	14:29:16	2,016.0000	32	XCSE
Genmab A/S	21/05/2024	14:29:16	2,016.0000	32	XCSE
Genmab A/S	21/05/2024	14:29:53	2,015.0000	52	CEUX
Genmab A/S	21/05/2024	14:33:02	2,015.0000	52	CEUX
Genmab A/S	21/05/2024	14:34:02	2,014.0000	52	CEUX
Genmab A/S	21/05/2024	14:37:31	2,013.0000	20	XCSE
Genmab A/S	21/05/2024	14:37:37	2,013.0000	20	XCSE
Genmab A/S	21/05/2024	14:38:02	2,013.0000	9	XCSE
Genmab A/S	21/05/2024	14:38:11	2,013.0000	57	CEUX

6

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	14:42:19	2,011.0000	20	XCSE
Genmab A/S	21/05/2024	14:42:19	2,012.0000	55	CEUX
Genmab A/S	21/05/2024	14:42:19	2,012.0000	54	CEUX
Genmab A/S	21/05/2024	14:50:05	2,017.0000	46	CEUX
Genmab A/S	21/05/2024	14:50:05	2,017.0000	6	CEUX
Genmab A/S	21/05/2024	14:50:05	2,017.0000	47	XCSE
Genmab A/S	21/05/2024	14:50:05	2,017.0000	4	XCSE
Genmab A/S	21/05/2024	14:50:05	2,017.0000	24	XCSE
Genmab A/S	21/05/2024	14:50:05	2,017.0000	16	XCSE
Genmab A/S	21/05/2024	14:56:55	2,016.0000	1	TQEX
Genmab A/S	21/05/2024	14:56:55	2,016.0000	9	XCSE
Genmab A/S	21/05/2024	14:56:55	2,016.0000	25	XCSE
Genmab A/S	21/05/2024	14:56:55	2,016.0000	3	XCSE
Genmab A/S	21/05/2024	14:58:01	2,015.0000	2	CEUX
Genmab A/S	21/05/2024	14:58:01	2,015.0000	43	CEUX
Genmab A/S	21/05/2024	14:58:01	2,015.0000	54	CEUX
Genmab A/S	21/05/2024	14:58:01	2,015.0000	7	AQEU
Genmab A/S	21/05/2024	14:58:01	2,015.0000	1	TQEX
Genmab A/S	21/05/2024	14:58:01	2,015.0000	5	TQEX
Genmab A/S	21/05/2024	14:58:01	2,015.0000	49	XCSE
Genmab A/S	21/05/2024	15:02:30	2,013.0000	14	CEUX
Genmab A/S	21/05/2024	15:02:30	2,013.0000	35	CEUX
Genmab A/S	21/05/2024	15:04:29	2,014.0000	3	XCSE
Genmab A/S	21/05/2024	15:04:29	2,014.0000	18	XCSE
Genmab A/S	21/05/2024	15:06:47	2,015.0000	12	XCSE
Genmab A/S	21/05/2024	15:06:47	2,015.0000	29	XCSE
Genmab A/S	21/05/2024	15:06:47	2,015.0000	11	XCSE
Genmab A/S	21/05/2024	15:06:47	2,015.0000	30	XCSE
Genmab A/S	21/05/2024	15:09:31	2,015.0000	22	CEUX
Genmab A/S	21/05/2024	15:09:34	2,015.0000	34	CEUX
Genmab A/S	21/05/2024	15:12:58	2,015.0000	5	CEUX
Genmab A/S	21/05/2024	15:12:58	2,015.0000	22	XCSE
Genmab A/S	21/05/2024	15:12:58	2,015.0000	36	CEUX
Genmab A/S	21/05/2024	15:12:58	2,015.0000	25	CEUX
Genmab A/S	21/05/2024	15:18:45	2,015.0000	27	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	27	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	2	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	27	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	13	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	8	XCSE

7

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	15:18:45	2,015.0000	19	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	20	XCSE
Genmab A/S	21/05/2024	15:18:45	2,015.0000	11	CEUX
Genmab A/S	21/05/2024	15:19:51	2,014.0000	53	XCSE
Genmab A/S	21/05/2024	15:21:45	2,015.0000	15	CEUX
Genmab A/S	21/05/2024	15:21:45	2,015.0000	42	CEUX
Genmab A/S	21/05/2024	15:25:15	2,017.0000	29	XCSE
Genmab A/S	21/05/2024	15:25:15	2,017.0000	45	XCSE
Genmab A/S	21/05/2024	15:28:56	2,018.0000	87	XCSE
Genmab A/S	21/05/2024	15:31:14	2,017.0000	3	XCSE
Genmab A/S	21/05/2024	15:31:14	2,017.0000	19	XCSE
Genmab A/S	21/05/2024	15:31:14	2,017.0000	20	CEUX
Genmab A/S	21/05/2024	15:31:14	2,017.0000	20	CEUX
Genmab A/S	21/05/2024	15:31:14	2,017.0000	16	CEUX
Genmab A/S	21/05/2024	15:31:14	2,017.0000	3	AQEU
Genmab A/S	21/05/2024	15:31:14	2,017.0000	14	AQEU
Genmab A/S	21/05/2024	15:31:14	2,017.0000	3	AQEU
Genmab A/S	21/05/2024	15:31:14	2,017.0000	19	AQEU
Genmab A/S	21/05/2024	15:31:14	2,017.0000	5	TQEX
Genmab A/S	21/05/2024	15:31:14	2,017.0000	13	TQEX
Genmab A/S	21/05/2024	15:31:14	2,017.0000	8	AQEU
Genmab A/S	21/05/2024	15:31:14	2,017.0000	36	CEUX
Genmab A/S	21/05/2024	15:31:14	2,017.0000	15	CEUX
Genmab A/S	21/05/2024	15:33:42	2,018.0000	26	XCSE
Genmab A/S	21/05/2024	15:33:42	2,018.0000	19	XCSE
Genmab A/S	21/05/2024	15:33:42	2,018.0000	47	XCSE
Genmab A/S	21/05/2024	15:33:42	2,018.0000	27	CEUX
Genmab A/S	21/05/2024	15:33:42	2,018.0000	20	CEUX
Genmab A/S	21/05/2024	15:33:42	2,018.0000	8	CEUX
Genmab A/S	21/05/2024	15:33:42	2,018.0000	31	XCSE
Genmab A/S	21/05/2024	15:33:42	2,018.0000	14	AQEU
Genmab A/S	21/05/2024	15:33:42	2,018.0000	14	XCSE
Genmab A/S	21/05/2024	15:37:17	2,017.0000	6	CEUX
Genmab A/S	21/05/2024	15:37:17	2,017.0000	2	CEUX
Genmab A/S	21/05/2024	15:37:17	2,017.0000	12	CEUX
Genmab A/S	21/05/2024	15:37:21	2,017.0000	58	CEUX
Genmab A/S	21/05/2024	15:43:03	2,017.0000	19	CEUX
Genmab A/S	21/05/2024	15:43:03	2,017.0000	29	CEUX
Genmab A/S	21/05/2024	15:43:03	2,017.0000	35	CEUX
Genmab A/S	21/05/2024	15:43:37	2,015.0000	82	XCSE

8

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	15:43:37	2,015.0000	78	XCSE
Genmab A/S	21/05/2024	15:48:10	2,015.0000	68	XCSE
Genmab A/S	21/05/2024	15:52:45	2,018.0000	3	CEUX
Genmab A/S	21/05/2024	15:52:45	2,018.0000	58	CEUX
Genmab A/S	21/05/2024	15:52:45	2,018.0000	9	AQEU
Genmab A/S	21/05/2024	15:52:45	2,018.0000	5	TQEX
Genmab A/S	21/05/2024	15:52:45	2,018.0000	4	TQEX
Genmab A/S	21/05/2024	15:52:45	2,018.0000	67	XCSE
Genmab A/S	21/05/2024	15:54:55	2,017.0000	18	CEUX
Genmab A/S	21/05/2024	15:58:04	2,018.0000	2	CEUX
Genmab A/S	21/05/2024	15:58:04	2,018.0000	1	AQEU
Genmab A/S	21/05/2024	15:58:04	2,018.0000	27	AQEU
Genmab A/S	21/05/2024	15:58:48	2,018.0000	10	XCSE
Genmab A/S	21/05/2024	15:58:48	2,018.0000	25	XCSE
Genmab A/S	21/05/2024	15:59:29	2,018.0000	8	AQEU
Genmab A/S	21/05/2024	15:59:29	2,018.0000	25	AQEU
Genmab A/S	21/05/2024	15:59:29	2,018.0000	2	TQEX
Genmab A/S	21/05/2024	15:59:34	2,017.0000	10	XCSE
Genmab A/S	21/05/2024	15:59:34	2,017.0000	55	XCSE
Genmab A/S	21/05/2024	15:59:34	2,017.0000	63	XCSE
Genmab A/S	21/05/2024	15:59:34	2,017.0000	41	CEUX
Genmab A/S	21/05/2024	15:59:34	2,017.0000	57	CEUX
Genmab A/S	21/05/2024	15:59:34	2,017.0000	9	TQEX
Genmab A/S	21/05/2024	15:59:34	2,017.0000	9	TQEX
Genmab A/S	21/05/2024	15:59:34	2,017.0000	9	CEUX
Genmab A/S	21/05/2024	15:59:34	2,017.0000	8	CEUX
Genmab A/S	21/05/2024	16:02:59	2,018.0000	38	CEUX
Genmab A/S	21/05/2024	16:02:59	2,018.0000	6	AQEU
Genmab A/S	21/05/2024	16:02:59	2,018.0000	6	TQEX
Genmab A/S	21/05/2024	16:02:59	2,018.0000	11	XCSE
Genmab A/S	21/05/2024	16:02:59	2,018.0000	32	XCSE
Genmab A/S	21/05/2024	16:02:59	2,017.0000	7	XCSE
Genmab A/S	21/05/2024	16:02:59	2,017.0000	35	XCSE
Genmab A/S	21/05/2024	16:02:59	2,017.0000	38	CEUX
Genmab A/S	21/05/2024	16:02:59	2,017.0000	60	CEUX
Genmab A/S	21/05/2024	16:03:00	2,017.0000	12	CEUX
Genmab A/S	21/05/2024	16:07:13	2,016.0000	46	XCSE
Genmab A/S	21/05/2024	16:07:13	2,016.0000	7	XCSE
Genmab A/S	21/05/2024	16:07:13	2,016.0000	36	XCSE
Genmab A/S	21/05/2024	16:07:13	2,016.0000	46	XCSE

9

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	16:07:13	2,016.0000	18	XCSE
Genmab A/S	21/05/2024	16:07:13	2,016.0000	25	XCSE
Genmab A/S	21/05/2024	16:07:13	2,016.0000	1	XCSE
Genmab A/S	21/05/2024	16:07:14	2,016.0000	13	CEUX
Genmab A/S	21/05/2024	16:07:14	2,016.0000	1	XCSE
Genmab A/S	21/05/2024	16:13:15	2,014.0000	73	AQEU
Genmab A/S	21/05/2024	16:14:52	2,015.0000	3	CEUX
Genmab A/S	21/05/2024	16:16:32	2,015.0000	18	CEUX
Genmab A/S	21/05/2024	16:16:32	2,015.0000	9	CEUX
Genmab A/S	21/05/2024	16:21:03	2,016.0000	15	CEUX
Genmab A/S	21/05/2024	16:21:03	2,016.0000	11	CEUX
Genmab A/S	21/05/2024	16:21:03	2,016.0000	5	AQEU
Genmab A/S	21/05/2024	16:21:03	2,016.0000	23	AQEU
Genmab A/S	21/05/2024	16:21:03	2,016.0000	14	AQEU
Genmab A/S	21/05/2024	16:21:03	2,016.0000	3	TQEX
Genmab A/S	21/05/2024	16:21:03	2,016.0000	8	TQEX
Genmab A/S	21/05/2024	16:21:03	2,016.0000	3	XCSE
Genmab A/S	21/05/2024	16:21:30	2,016.0000	4	CEUX
Genmab A/S	21/05/2024	16:21:30	2,016.0000	12	AQEU
Genmab A/S	21/05/2024	16:21:30	2,016.0000	8	AQEU
Genmab A/S	21/05/2024	16:21:30	2,016.0000	14	AQEU
Genmab A/S	21/05/2024	16:22:27	2,016.0000	25	CEUX
Genmab A/S	21/05/2024	16:22:27	2,016.0000	1	CEUX
Genmab A/S	21/05/2024	16:22:27	2,016.0000	9	XCSE
Genmab A/S	21/05/2024	16:23:04	2,016.0000	21	CEUX
Genmab A/S	21/05/2024	16:23:04	2,016.0000	16	CEUX
Genmab A/S	21/05/2024	16:24:06	2,016.0000	37	XCSE
Genmab A/S	21/05/2024	16:24:29	2,015.0000	70	CEUX
Genmab A/S	21/05/2024	16:24:29	2,015.0000	5	CEUX
Genmab A/S	21/05/2024	16:24:29	2,015.0000	11	AQEU
Genmab A/S	21/05/2024	16:24:29	2,015.0000	12	TQEX
Genmab A/S	21/05/2024	16:24:29	2,015.0000	84	XCSE
Genmab A/S	21/05/2024	16:24:29	2,014.0000	9	XCSE
Genmab A/S	21/05/2024	16:24:29	2,014.0000	5	TQEX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	20	CEUX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	11	XCSE
Genmab A/S	21/05/2024	16:24:29	2,014.0000	10	XCSE
Genmab A/S	21/05/2024	16:24:29	2,014.0000	20	CEUX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	2	AQEU
Genmab A/S	21/05/2024	16:24:29	2,014.0000	6	XCSE

10

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	16:24:29	2,014.0000	14	XCSE
Genmab A/S	21/05/2024	16:24:29	2,014.0000	20	XCSE
Genmab A/S	21/05/2024	16:24:29	2,014.0000	20	CEUX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	5	CEUX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	2	AQEU
Genmab A/S	21/05/2024	16:24:29	2,014.0000	2	AQEU
Genmab A/S	21/05/2024	16:24:29	2,014.0000	5	TQEX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	47	CEUX
Genmab A/S	21/05/2024	16:24:29	2,014.0000	17	CEUX
Genmab A/S	21/05/2024	16:29:48	2,009.0000	86	CEUX
Genmab A/S	21/05/2024	16:33:28	2,009.0000	9	CEUX
Genmab A/S	21/05/2024	16:33:28	2,009.0000	56	CEUX
Genmab A/S	21/05/2024	16:33:28	2,009.0000	9	AQEU
Genmab A/S	21/05/2024	16:33:28	2,009.0000	2	TQEX
Genmab A/S	21/05/2024	16:33:28	2,009.0000	7	TQEX
Genmab A/S	21/05/2024	16:33:28	2,009.0000	22	XCSE
Genmab A/S	21/05/2024	16:33:28	2,009.0000	50	XCSE
Genmab A/S	21/05/2024	16:36:05	2,010.0000	8	CEUX
Genmab A/S	21/05/2024	16:36:06	2,010.0000	36	CEUX
Genmab A/S	21/05/2024	16:36:06	2,010.0000	49	XCSE
Genmab A/S	21/05/2024	16:36:06	2,010.0000	9	TQEX
Genmab A/S	21/05/2024	16:36:06	2,010.0000	4	TQEX
Genmab A/S	21/05/2024	16:38:00	2,009.0000	6	AQEU
Genmab A/S	21/05/2024	16:38:00	2,009.0000	7	TQEX
Genmab A/S	21/05/2024	16:38:00	2,009.0000	7	TQEX
Genmab A/S	21/05/2024	16:39:31	2,009.0000	48	XCSE
Genmab A/S	21/05/2024	16:39:31	2,009.0000	7	TQEX
Genmab A/S	21/05/2024	16:39:31	2,009.0000	1	XCSE
Genmab A/S	21/05/2024	16:39:31	2,009.0000	48	CEUX
Genmab A/S	21/05/2024	16:40:41	2,010.0000	39	CEUX
Genmab A/S	21/05/2024	16:40:41	2,010.0000	40	CEUX
Genmab A/S	21/05/2024	16:40:41	2,010.0000	12	AQEU
Genmab A/S	21/05/2024	16:40:41	2,010.0000	12	TQEX
Genmab A/S	21/05/2024	16:40:41	2,010.0000	50	XCSE
Genmab A/S	21/05/2024	16:40:41	2,010.0000	21	XCSE
Genmab A/S	21/05/2024	16:40:41	2,010.0000	18	XCSE
Genmab A/S	21/05/2024	16:43:52	2,008.0000	48	XCSE
Genmab A/S	21/05/2024	16:43:52	2,008.0000	43	CEUX
Genmab A/S	21/05/2024	16:43:52	2,008.0000	2	AQEU
Genmab A/S	21/05/2024	16:43:52	2,008.0000	4	AQEU

11

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	21/05/2024	16:43:52	2,008.0000	7	TQEX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	127	CEUX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	65	CEUX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	62	CEUX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	34	CEUX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	18	AQEU
Genmab A/S	21/05/2024	16:45:47	2,008.0000	18	AQEU
Genmab A/S	21/05/2024	16:45:47	2,008.0000	4	AQEU
Genmab A/S	21/05/2024	16:45:47	2,008.0000	20	TQEX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	20	TQEX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	5	TQEX
Genmab A/S	21/05/2024	16:45:47	2,008.0000	142	XCSE
Genmab A/S	21/05/2024	16:45:47	2,008.0000	142	XCSE
Genmab A/S	21/05/2024	16:45:47	2,008.0000	25	XCSE
Genmab A/S	21/05/2024	16:45:47	2,008.0000	12	XCSE
Genmab A/S	21/05/2024	16:48:32	2,005.0000	6	CEUX
Genmab A/S	21/05/2024	16:48:32	2,005.0000	3	AQEU
Genmab A/S	21/05/2024	16:48:32	2,005.0000	5	TQEX
Genmab A/S	21/05/2024	16:48:33	2,005.0000	14	CEUX
Genmab A/S	21/05/2024	16:48:33	2,005.0000	3	AQEU
Genmab A/S	21/05/2024	16:48:33	2,005.0000	5	TQEX
Genmab A/S	21/05/2024	16:52:08	2,008.0000	26	TQEX
Genmab A/S	21/05/2024	16:52:08	2,008.0000	170	CEUX
Genmab A/S	21/05/2024	16:52:08	2,008.0000	24	AQEU
Genmab A/S	21/05/2024	16:52:08	2,008.0000	190	XCSE
Genmab A/S	21/05/2024	16:52:08	2,008.0000	26	XCSE
Genmab A/S	21/05/2024	16:52:08	2,008.0000	3	CEUX
Genmab A/S	21/05/2024	16:52:08	2,008.0000	8	AQEU
Genmab A/S	21/05/2024	16:52:08	2,008.0000	27	CEUX
Genmab A/S	21/05/2024	16:52:08	2,008.0000	6	AQEU
Genmab A/S	21/05/2024	16:52:08	2,008.0000	3	AQEU
Genmab A/S	21/05/2024	16:52:08	2,008.0000	15	AQEU
Genmab A/S	21/05/2024	16:52:08	2,008.0000	14	AQEU
Genmab A/S	22/05/2024	09:00:06	2,003.0000	49	XCSE
Genmab A/S	22/05/2024	09:00:06	2,003.0000	51	XCSE
Genmab A/S	22/05/2024	09:00:06	2,003.0000	49	XCSE
Genmab A/S	22/05/2024	09:00:06	2,003.0000	51	XCSE
Genmab A/S	22/05/2024	09:00:06	2,003.0000	49	XCSE
Genmab A/S	22/05/2024	09:00:06	2,003.0000	51	XCSE
Genmab A/S	22/05/2024	09:00:06	2,003.0000	49	XCSE

12

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:00:06	2,003.0000	51	XCSE
Genmab A/S	22/05/2024	09:00:07	2,003.0000	49	XCSE
Genmab A/S	22/05/2024	09:00:07	2,003.0000	51	XCSE
Genmab A/S	22/05/2024	09:00:07	2,003.0000	40	XCSE
Genmab A/S	22/05/2024	09:00:07	2,003.0000	44	XCSE
Genmab A/S	22/05/2024	09:00:08	2,000.0000	21	CEUX
Genmab A/S	22/05/2024	09:00:08	2,000.0000	21	CEUX
Genmab A/S	22/05/2024	09:00:08	2,000.0000	17	CEUX
Genmab A/S	22/05/2024	09:00:09	2,000.0000	23	XCSE
Genmab A/S	22/05/2024	09:00:09	2,000.0000	23	XCSE
Genmab A/S	22/05/2024	09:00:09	2,000.0000	19	XCSE
Genmab A/S	22/05/2024	09:01:04	1,993.5000	39	CEUX
Genmab A/S	22/05/2024	09:01:40	1,995.0000	51	XCSE
Genmab A/S	22/05/2024	09:01:40	1,995.0000	51	XCSE
Genmab A/S	22/05/2024	09:01:40	1,995.0000	22	XCSE
Genmab A/S	22/05/2024	09:06:23	2,000.0000	42	CEUX
Genmab A/S	22/05/2024	09:06:23	1,999.0000	19	XCSE
Genmab A/S	22/05/2024	09:06:23	1,999.0000	19	XCSE
Genmab A/S	22/05/2024	09:06:23	1,999.0000	19	CEUX
Genmab A/S	22/05/2024	09:06:23	1,999.0000	3	AQEU
Genmab A/S	22/05/2024	09:06:23	1,999.0000	5	TQEX
Genmab A/S	22/05/2024	09:06:23	1,999.0000	3	XCSE
Genmab A/S	22/05/2024	09:07:38	1,998.5000	23	XCSE
Genmab A/S	22/05/2024	09:07:44	1,998.0000	24	XCSE
Genmab A/S	22/05/2024	09:07:44	1,998.0000	24	XCSE
Genmab A/S	22/05/2024	09:07:44	1,998.0000	25	XCSE
Genmab A/S	22/05/2024	09:07:44	1,998.0000	49	XCSE
Genmab A/S	22/05/2024	09:07:44	1,998.0000	8	XCSE
Genmab A/S	22/05/2024	09:07:44	1,996.5000	46	XCSE
Genmab A/S	22/05/2024	09:07:44	1,996.5000	46	XCSE
Genmab A/S	22/05/2024	09:07:45	1,996.5000	46	XCSE
Genmab A/S	22/05/2024	09:07:45	1,996.5000	11	XCSE
Genmab A/S	22/05/2024	09:08:07	1,994.0000	24	XCSE
Genmab A/S	22/05/2024	09:08:07	1,994.0000	33	XCSE
Genmab A/S	22/05/2024	09:08:07	1,994.0000	22	CEUX
Genmab A/S	22/05/2024	09:08:07	1,994.0000	4	TQEX
Genmab A/S	22/05/2024	09:10:20	1,999.5000	58	XCSE
Genmab A/S	22/05/2024	09:10:20	1,999.5000	52	CEUX
Genmab A/S	22/05/2024	09:10:20	1,999.5000	8	XCSE
Genmab A/S	22/05/2024	09:11:20	2,004.0000	12	XCSE

13

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:11:20	2,004.0000	14	XCSE
Genmab A/S	22/05/2024	09:11:20	2,004.0000	36	XCSE
Genmab A/S	22/05/2024	09:11:20	2,004.0000	13	XCSE
Genmab A/S	22/05/2024	09:11:20	2,004.0000	13	XCSE
Genmab A/S	22/05/2024	09:11:20	2,004.0000	19	XCSE
Genmab A/S	22/05/2024	09:13:25	2,006.0000	20	XCSE
Genmab A/S	22/05/2024	09:13:25	2,006.0000	20	XCSE
Genmab A/S	22/05/2024	09:13:25	2,006.0000	19	CEUX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	8	CEUX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	2	AQEU
Genmab A/S	22/05/2024	09:13:25	2,006.0000	8	AQEU
Genmab A/S	22/05/2024	09:13:25	2,006.0000	20	XCSE
Genmab A/S	22/05/2024	09:13:25	2,006.0000	5	TQEX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	8	TQEX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	19	CEUX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	19	CEUX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	2	AQEU
Genmab A/S	22/05/2024	09:13:25	2,006.0000	2	AQEU
Genmab A/S	22/05/2024	09:13:25	2,006.0000	5	TQEX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	5	TQEX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	2	CEUX
Genmab A/S	22/05/2024	09:13:25	2,006.0000	11	XCSE
Genmab A/S	22/05/2024	09:13:25	2,006.0000	44	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	23	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	8	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	43	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	8	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	15	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	8	AQEU
Genmab A/S	22/05/2024	09:14:23	2,006.0000	17	CEUX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	7	TQEX
Genmab A/S	22/05/2024	09:14:23	2,006.0000	57	XCSE
Genmab A/S	22/05/2024	09:16:01	2,006.0000	8	XCSE
Genmab A/S	22/05/2024	09:16:01	2,006.0000	5	XCSE
Genmab A/S	22/05/2024	09:16:01	2,006.0000	8	XCSE
Genmab A/S	22/05/2024	09:16:01	2,006.0000	8	XCSE
Genmab A/S	22/05/2024	09:16:01	2,006.0000	12	XCSE
Genmab A/S	22/05/2024	09:16:01	2,006.0000	5	TQEX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	3	CEUX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	6	CEUX

14

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:16:01	2,006.0000	6	CEUX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	3	CEUX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	2	AQEU
Genmab A/S	22/05/2024	09:16:01	2,006.0000	2	TQEX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	3	TQEX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	5	TQEX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	24	CEUX
Genmab A/S	22/05/2024	09:16:01	2,006.0000	24	CEUX
Genmab A/S	22/05/2024	09:16:01	2,005.0000	11	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	40	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	47	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	6	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	45	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	42	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	5	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	26	XCSE
Genmab A/S	22/05/2024	09:16:01	2,005.0000	1	XCSE
Genmab A/S	22/05/2024	09:19:46	2,010.0000	9	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	45	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	45	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	7	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	2	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	1	AQEU
Genmab A/S	22/05/2024	09:20:06	2,010.0000	5	TQEX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	5	TQEX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	CEUX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	4	TQEX
Genmab A/S	22/05/2024	09:20:06	2,010.0000	2	CEUX

15

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:20:06	2,010.0000	9	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	6	XCSE
Genmab A/S	22/05/2024	09:20:06	2,010.0000	67	XCSE
Genmab A/S	22/05/2024	09:20:07	2,010.0000	24	CEUX
Genmab A/S	22/05/2024	09:20:07	2,010.0000	24	CEUX
Genmab A/S	22/05/2024	09:25:33	2,010.0000	25	XCSE
Genmab A/S	22/05/2024	09:25:33	2,010.0000	42	XCSE
Genmab A/S	22/05/2024	09:25:33	2,010.0000	25	XCSE
Genmab A/S	22/05/2024	09:25:33	2,010.0000	17	XCSE
Genmab A/S	22/05/2024	09:25:33	2,010.0000	8	XCSE
Genmab A/S	22/05/2024	09:26:40	2,006.0000	42	XCSE
Genmab A/S	22/05/2024	09:26:40	2,006.0000	37	CEUX
Genmab A/S	22/05/2024	09:26:40	2,006.0000	38	CEUX
Genmab A/S	22/05/2024	09:26:40	2,006.0000	6	AQEU
Genmab A/S	22/05/2024	09:26:40	2,006.0000	6	TQEX
Genmab A/S	22/05/2024	09:29:19	2,008.0000	37	CEUX
Genmab A/S	22/05/2024	09:29:19	2,008.0000	87	XCSE
Genmab A/S	22/05/2024	09:29:19	2,008.0000	46	XCSE
Genmab A/S	22/05/2024	09:32:34	2,004.0000	18	XCSE
Genmab A/S	22/05/2024	09:32:34	2,004.0000	9	CEUX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	4	CEUX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	3	CEUX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	3	CEUX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	19	CEUX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	2	CEUX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	3	AQEU
Genmab A/S	22/05/2024	09:32:34	2,004.0000	5	TQEX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	5	TQEX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	5	TQEX
Genmab A/S	22/05/2024	09:32:34	2,004.0000	45	XCSE
Genmab A/S	22/05/2024	09:32:34	2,004.0000	6	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	1	AQEU
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX

16

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	3	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	1	AQEU
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	09:37:56	2,016.0000	36	CEUX
Genmab A/S	22/05/2024	09:37:56	2,016.0000	2	AQEU
Genmab A/S	22/05/2024	09:37:57	2,014.0000	44	XCSE
Genmab A/S	22/05/2024	09:37:57	2,014.0000	44	XCSE
Genmab A/S	22/05/2024	09:37:57	2,014.0000	17	XCSE
Genmab A/S	22/05/2024	09:37:57	2,014.0000	2	XCSE
Genmab A/S	22/05/2024	09:37:57	2,014.0000	8	XCSE
Genmab A/S	22/05/2024	09:37:58	2,014.0000	17	XCSE
Genmab A/S	22/05/2024	09:41:17	2,015.0000	25	XCSE
Genmab A/S	22/05/2024	09:41:17	2,015.0000	25	XCSE
Genmab A/S	22/05/2024	09:41:17	2,015.0000	56	XCSE
Genmab A/S	22/05/2024	09:41:17	2,015.0000	21	XCSE
Genmab A/S	22/05/2024	09:41:17	2,015.0000	21	XCSE
Genmab A/S	22/05/2024	09:41:17	2,015.0000	21	XCSE
Genmab A/S	22/05/2024	09:41:18	2,015.0000	21	XCSE
Genmab A/S	22/05/2024	09:41:18	2,015.0000	21	XCSE
Genmab A/S	22/05/2024	09:41:18	2,015.0000	6	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	23	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	9	XCSE

17

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:41:18	2,014.0000	40	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	23	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	17	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	34	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	11	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	29	XCSE
Genmab A/S	22/05/2024	09:41:18	2,014.0000	34	XCSE
Genmab A/S	22/05/2024	09:49:18	2,012.0000	19	XCSE
Genmab A/S	22/05/2024	09:49:18	2,012.0000	20	XCSE
Genmab A/S	22/05/2024	09:49:18	2,013.0000	70	XCSE
Genmab A/S	22/05/2024	09:49:18	2,013.0000	167	XCSE
Genmab A/S	22/05/2024	09:49:18	2,013.0000	124	CEUX
Genmab A/S	22/05/2024	09:49:18	2,013.0000	21	CEUX
Genmab A/S	22/05/2024	09:49:18	2,013.0000	5	CEUX
Genmab A/S	22/05/2024	09:49:18	2,013.0000	21	AQEU
Genmab A/S	22/05/2024	09:49:18	2,013.0000	23	TQEX
Genmab A/S	22/05/2024	09:53:17	2,014.0000	18	XCSE
Genmab A/S	22/05/2024	09:53:17	2,014.0000	18	CEUX
Genmab A/S	22/05/2024	09:53:17	2,014.0000	2	AQEU
Genmab A/S	22/05/2024	09:53:17	2,014.0000	18	XCSE
Genmab A/S	22/05/2024	09:53:17	2,014.0000	4	XCSE
Genmab A/S	22/05/2024	09:55:28	2,025.0000	80	XCSE
Genmab A/S	22/05/2024	09:55:43	2,021.0000	43	XCSE
Genmab A/S	22/05/2024	09:55:43	2,021.0000	43	XCSE
Genmab A/S	22/05/2024	09:55:43	2,021.0000	43	XCSE
Genmab A/S	22/05/2024	09:55:43	2,020.0000	44	CEUX
Genmab A/S	22/05/2024	09:55:43	2,019.0000	18	CEUX
Genmab A/S	22/05/2024	09:55:43	2,019.0000	3	AQEU
Genmab A/S	22/05/2024	09:55:43	2,019.0000	5	TQEX
Genmab A/S	22/05/2024	09:55:43	2,020.0000	44	CEUX
Genmab A/S	22/05/2024	09:55:43	2,021.0000	2	XCSE
Genmab A/S	22/05/2024	09:55:43	2,019.0000	17	XCSE
Genmab A/S	22/05/2024	09:55:43	2,019.0000	17	XCSE
Genmab A/S	22/05/2024	09:55:43	2,020.0000	8	XCSE
Genmab A/S	22/05/2024	09:55:43	2,020.0000	43	XCSE
Genmab A/S	22/05/2024	09:55:43	2,020.0000	13	XCSE
Genmab A/S	22/05/2024	09:55:43	2,020.0000	21	XCSE
Genmab A/S	22/05/2024	09:55:43	2,020.0000	43	XCSE
Genmab A/S	22/05/2024	09:55:43	2,019.0000	5	XCSE
Genmab A/S	22/05/2024	09:55:43	2,019.0000	8	AQEU

18

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	09:55:43	2,019.0000	43	AQEU
Genmab A/S	22/05/2024	09:55:43	2,019.0000	6	AQEU
Genmab A/S	22/05/2024	09:59:53	2,014.0000	53	CEUX
Genmab A/S	22/05/2024	09:59:53	2,014.0000	19	CEUX
Genmab A/S	22/05/2024	09:59:53	2,014.0000	8	AQEU
Genmab A/S	22/05/2024	09:59:53	2,013.0000	51	XCSE
Genmab A/S	22/05/2024	09:59:53	2,013.0000	53	XCSE
Genmab A/S	22/05/2024	10:01:48	2,008.0000	10	XCSE
Genmab A/S	22/05/2024	10:01:48	2,008.0000	20	XCSE
Genmab A/S	22/05/2024	10:01:48	2,008.0000	20	XCSE
Genmab A/S	22/05/2024	10:01:48	2,008.0000	3	XCSE
Genmab A/S	22/05/2024	10:05:07	2,011.0000	42	XCSE
Genmab A/S	22/05/2024	10:05:07	2,011.0000	42	XCSE
Genmab A/S	22/05/2024	10:07:27	2,013.0000	53	XCSE
Genmab A/S	22/05/2024	10:07:27	2,013.0000	75	XCSE
Genmab A/S	22/05/2024	10:07:27	2,012.0000	25	XCSE
Genmab A/S	22/05/2024	10:07:27	2,012.0000	25	XCSE
Genmab A/S	22/05/2024	10:07:27	2,012.0000	59	XCSE
Genmab A/S	22/05/2024	10:07:27	2,012.0000	17	XCSE
Genmab A/S	22/05/2024	10:07:27	2,012.0000	36	TQEX
Genmab A/S	22/05/2024	10:12:02	2,002.0000	48	XCSE
Genmab A/S	22/05/2024	10:12:03	2,002.0000	56	CEUX
Genmab A/S	22/05/2024	10:12:04	2,001.0000	44	XCSE
Genmab A/S	22/05/2024	10:18:22	2,014.0000	2	CEUX
Genmab A/S	22/05/2024	10:18:25	2,014.0000	38	CEUX
Genmab A/S	22/05/2024	10:18:32	2,013.0000	50	XCSE
Genmab A/S	22/05/2024	10:18:32	2,013.0000	4	XCSE
Genmab A/S	22/05/2024	10:18:32	2,013.0000	36	CEUX
Genmab A/S	22/05/2024	10:18:32	2,013.0000	8	CEUX
Genmab A/S	22/05/2024	10:18:32	2,013.0000	41	CEUX
Genmab A/S	22/05/2024	10:18:32	2,013.0000	7	AQEU
Genmab A/S	22/05/2024	10:18:32	2,013.0000	8	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	18	XCSE
Genmab A/S	22/05/2024	10:18:32	2,012.0000	43	XCSE
Genmab A/S	22/05/2024	10:18:32	2,012.0000	43	XCSE
Genmab A/S	22/05/2024	10:18:32	2,012.0000	27	XCSE
Genmab A/S	22/05/2024	10:18:32	2,011.0000	18	XCSE
Genmab A/S	22/05/2024	10:18:32	2,011.0000	18	XCSE
Genmab A/S	22/05/2024	10:18:32	2,011.0000	6	XCSE
Genmab A/S	22/05/2024	10:18:32	2,011.0000	18	CEUX

19

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	10:18:32	2,011.0000	18	CEUX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	18	CEUX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	2	CEUX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	2	AQEU
Genmab A/S	22/05/2024	10:18:32	2,011.0000	2	AQEU
Genmab A/S	22/05/2024	10:18:32	2,011.0000	2	AQEU
Genmab A/S	22/05/2024	10:18:32	2,011.0000	5	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	5	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	8	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	5	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	5	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	8	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	5	TQEX
Genmab A/S	22/05/2024	10:18:32	2,011.0000	8	AQEU
Genmab A/S	22/05/2024	10:18:32	2,010.0000	25	XCSE
Genmab A/S	22/05/2024	10:18:32	2,010.0000	21	XCSE
Genmab A/S	22/05/2024	10:18:32	2,010.0000	21	XCSE
Genmab A/S	22/05/2024	10:18:32	2,010.0000	21	XCSE
Genmab A/S	22/05/2024	10:18:32	2,010.0000	22	XCSE
Genmab A/S	22/05/2024	10:18:32	2,010.0000	25	XCSE
Genmab A/S	22/05/2024	10:24:44	2,013.0000	28	XCSE
Genmab A/S	22/05/2024	10:24:44	2,013.0000	43	XCSE
Genmab A/S	22/05/2024	10:28:51	2,015.0000	107	XCSE
Genmab A/S	22/05/2024	10:28:51	2,015.0000	62	CEUX
Genmab A/S	22/05/2024	10:28:51	2,015.0000	4	CEUX
Genmab A/S	22/05/2024	10:28:51	2,015.0000	31	CEUX
Genmab A/S	22/05/2024	10:28:51	2,015.0000	4	TQEX
Genmab A/S	22/05/2024	10:28:51	2,015.0000	11	TQEX
Genmab A/S	22/05/2024	10:28:53	2,013.0000	46	XCSE
Genmab A/S	22/05/2024	10:35:07	2,015.0000	34	XCSE
Genmab A/S	22/05/2024	10:35:20	2,014.0000	22	XCSE
Genmab A/S	22/05/2024	10:35:20	2,014.0000	22	XCSE
Genmab A/S	22/05/2024	10:35:20	2,014.0000	22	XCSE
Genmab A/S	22/05/2024	10:35:20	2,014.0000	22	XCSE
Genmab A/S	22/05/2024	10:35:20	2,014.0000	22	XCSE
Genmab A/S	22/05/2024	10:35:20	2,014.0000	22	XCSE
Genmab A/S	22/05/2024	10:38:04	2,015.0000	8	CEUX
Genmab A/S	22/05/2024	10:38:04	2,015.0000	8	CEUX
Genmab A/S	22/05/2024	10:38:04	2,015.0000	5	TQEX
Genmab A/S	22/05/2024	10:38:04	2,015.0000	5	TQEX

20

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	10:38:04	2,015.0000	8	XCSE
Genmab A/S	22/05/2024	10:38:04	2,015.0000	8	XCSE
Genmab A/S	22/05/2024	10:38:04	2,015.0000	2	XCSE
Genmab A/S	22/05/2024	10:38:04	2,015.0000	8	CEUX
Genmab A/S	22/05/2024	10:38:04	2,015.0000	8	CEUX
Genmab A/S	22/05/2024	10:39:02	2,015.0000	6	XCSE
Genmab A/S	22/05/2024	10:40:18	2,015.0000	8	XCSE
Genmab A/S	22/05/2024	10:40:18	2,015.0000	24	XCSE
Genmab A/S	22/05/2024	10:40:18	2,015.0000	8	CEUX
Genmab A/S	22/05/2024	10:40:18	2,015.0000	8	CEUX
Genmab A/S	22/05/2024	10:40:18	2,015.0000	5	CEUX
Genmab A/S	22/05/2024	10:40:18	2,015.0000	1	AQEU
Genmab A/S	22/05/2024	10:40:18	2,015.0000	1	AQEU
Genmab A/S	22/05/2024	10:40:18	2,015.0000	5	TQEX
Genmab A/S	22/05/2024	10:40:18	2,015.0000	5	TQEX
Genmab A/S	22/05/2024	10:40:18	2,015.0000	36	CEUX
Genmab A/S	22/05/2024	10:40:18	2,015.0000	8	AQEU
Genmab A/S	22/05/2024	10:40:18	2,015.0000	8	AQEU
Genmab A/S	22/05/2024	10:40:18	2,015.0000	6	CEUX
Genmab A/S	22/05/2024	10:42:03	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:42:03	2,016.0000	1	AQEU
Genmab A/S	22/05/2024	10:42:03	2,016.0000	8	AQEU
Genmab A/S	22/05/2024	10:42:03	2,016.0000	6	XCSE
Genmab A/S	22/05/2024	10:42:03	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	10:42:03	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	10:42:03	2,016.0000	8	TQEX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	3	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	1	AQEU
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	1	AQEU

21

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	CEUX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	5	TQEX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	3	TQEX
Genmab A/S	22/05/2024	10:43:30	2,016.0000	24	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	15	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	9	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	24	XCSE
Genmab A/S	22/05/2024	10:43:30	2,016.0000	1	AQEU
Genmab A/S	22/05/2024	10:44:36	2,014.0000	34	XCSE
Genmab A/S	22/05/2024	10:44:36	2,014.0000	9	XCSE
Genmab A/S	22/05/2024	10:44:36	2,014.0000	44	XCSE
Genmab A/S	22/05/2024	10:44:36	2,014.0000	43	XCSE
Genmab A/S	22/05/2024	10:44:36	2,014.0000	7	XCSE
Genmab A/S	22/05/2024	10:44:36	2,014.0000	41	CEUX
Genmab A/S	22/05/2024	10:44:36	2,014.0000	6	AQEU
Genmab A/S	22/05/2024	10:44:36	2,014.0000	6	TQEX
Genmab A/S	22/05/2024	10:48:00	2,011.0000	44	XCSE
Genmab A/S	22/05/2024	10:48:00	2,011.0000	14	XCSE
Genmab A/S	22/05/2024	10:48:00	2,011.0000	30	XCSE
Genmab A/S	22/05/2024	10:56:38	2,013.0000	25	CEUX
Genmab A/S	22/05/2024	10:57:16	2,015.0000	8	TQEX
Genmab A/S	22/05/2024	10:57:26	2,015.0000	8	TQEX
Genmab A/S	22/05/2024	10:57:26	2,015.0000	2	TQEX
Genmab A/S	22/05/2024	10:57:26	2,015.0000	10	TQEX
Genmab A/S	22/05/2024	10:57:41	2,013.0000	82	XCSE
Genmab A/S	22/05/2024	10:57:41	2,013.0000	49	CEUX
Genmab A/S	22/05/2024	10:57:41	2,013.0000	25	CEUX
Genmab A/S	22/05/2024	10:57:41	2,013.0000	25	CEUX
Genmab A/S	22/05/2024	10:57:41	2,013.0000	11	AQEU
Genmab A/S	22/05/2024	10:57:41	2,013.0000	11	TQEX
Genmab A/S	22/05/2024	10:57:41	2,013.0000	25	CEUX
Genmab A/S	22/05/2024	10:57:44	2,013.0000	83	XCSE
Genmab A/S	22/05/2024	10:57:44	2,013.0000	16	CEUX
Genmab A/S	22/05/2024	10:57:44	2,013.0000	76	CEUX
Genmab A/S	22/05/2024	10:57:44	2,013.0000	11	AQEU
Genmab A/S	22/05/2024	10:57:44	2,013.0000	11	TQEX
Genmab A/S	22/05/2024	11:01:47	2,011.0000	44	CEUX

22

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	11:01:47	2,011.0000	41	CEUX
Genmab A/S	22/05/2024	11:01:47	2,011.0000	4	AQEU
Genmab A/S	22/05/2024	11:01:47	2,011.0000	6	TQEX
Genmab A/S	22/05/2024	11:01:47	2,011.0000	7	TQEX
Genmab A/S	22/05/2024	11:01:47	2,011.0000	49	XCSE
Genmab A/S	22/05/2024	11:01:47	2,011.0000	46	XCSE
Genmab A/S	22/05/2024	11:01:47	2,011.0000	3	CEUX
Genmab A/S	22/05/2024	11:10:30	2,015.0000	10	CEUX
Genmab A/S	22/05/2024	11:11:19	2,016.0000	6	CEUX
Genmab A/S	22/05/2024	11:11:19	2,016.0000	7	CEUX
Genmab A/S	22/05/2024	11:11:19	2,016.0000	8	CEUX
Genmab A/S	22/05/2024	11:12:03	2,016.0000	39	CEUX
Genmab A/S	22/05/2024	11:12:03	2,016.0000	68	CEUX
Genmab A/S	22/05/2024	11:12:03	2,016.0000	8	CEUX
Genmab A/S	22/05/2024	11:12:03	2,016.0000	20	CEUX
Genmab A/S	22/05/2024	11:12:03	2,016.0000	14	XCSE
Genmab A/S	22/05/2024	11:12:03	2,016.0000	60	XCSE
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	XCSE
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	XCSE
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	2	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	3	CEUX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	1	AQEU
Genmab A/S	22/05/2024	11:13:46	2,020.0000	3	AQEU
Genmab A/S	22/05/2024	11:13:46	2,020.0000	1	AQEU
Genmab A/S	22/05/2024	11:13:46	2,020.0000	3	AQEU
Genmab A/S	22/05/2024	11:13:46	2,020.0000	5	TQEX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	TQEX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	5	TQEX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	TQEX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	5	TQEX
Genmab A/S	22/05/2024	11:13:46	2,020.0000	8	XCSE
Genmab A/S	22/05/2024	11:13:46	2,020.0000	7	XCSE
Genmab A/S	22/05/2024	11:19:00	2,025.0000	80	XCSE
Genmab A/S	22/05/2024	11:41:07	2,025.0000	27	XCSE
Genmab A/S	22/05/2024	11:42:39	2,026.0000	33	XCSE

23

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	11:42:39	2,026.0000	15	XCSE
Genmab A/S	22/05/2024	11:42:39	2,026.0000	7	TQEX
Genmab A/S	22/05/2024	11:42:39	2,026.0000	43	CEUX
Genmab A/S	22/05/2024	11:42:39	2,026.0000	6	AQEU
Genmab A/S	22/05/2024	11:44:11	2,025.0000	66	CEUX
Genmab A/S	22/05/2024	11:50:12	2,029.0000	2	CEUX
Genmab A/S	22/05/2024	11:50:12	2,029.0000	9	AQEU
Genmab A/S	22/05/2024	11:52:56	2,030.0000	10	XCSE
Genmab A/S	22/05/2024	11:52:56	2,030.0000	28	XCSE
Genmab A/S	22/05/2024	11:53:06	2,030.0000	38	XCSE
Genmab A/S	22/05/2024	11:53:06	2,030.0000	7	XCSE
Genmab A/S	22/05/2024	11:53:24	2,030.0000	12	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	22	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	10	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	10	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	22	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	5	AQEU
Genmab A/S	22/05/2024	11:53:24	2,030.0000	5	AQEU
Genmab A/S	22/05/2024	11:53:24	2,030.0000	5	AQEU
Genmab A/S	22/05/2024	11:53:24	2,030.0000	2	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	17	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	5	AQEU
Genmab A/S	22/05/2024	11:53:24	2,030.0000	6	TQEX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	6	TQEX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	19	XCSE
Genmab A/S	22/05/2024	11:53:24	2,030.0000	40	CEUX
Genmab A/S	22/05/2024	11:53:24	2,030.0000	8	AQEU
Genmab A/S	22/05/2024	11:59:00	2,030.0000	42	XCSE
Genmab A/S	22/05/2024	11:59:00	2,030.0000	9	XCSE
Genmab A/S	22/05/2024	12:05:36	2,032.0000	21	CEUX
Genmab A/S	22/05/2024	12:05:36	2,032.0000	79	XCSE
Genmab A/S	22/05/2024	12:05:37	2,032.0000	54	CEUX
Genmab A/S	22/05/2024	12:13:02	2,035.0000	5	TQEX
Genmab A/S	22/05/2024	12:13:02	2,035.0000	5	TQEX
Genmab A/S	22/05/2024	12:13:05	2,035.0000	8	XCSE
Genmab A/S	22/05/2024	12:13:05	2,035.0000	19	XCSE
Genmab A/S	22/05/2024	12:14:29	2,035.0000	8	XCSE
Genmab A/S	22/05/2024	12:14:29	2,035.0000	34	XCSE
Genmab A/S	22/05/2024	12:14:29	2,035.0000	8	CEUX
Genmab A/S	22/05/2024	12:14:29	2,035.0000	5	TQEX

24

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	12:14:29	2,035.0000	8	CEUX
Genmab A/S	22/05/2024	12:14:29	2,035.0000	1	CEUX
Genmab A/S	22/05/2024	12:14:29	2,035.0000	1	AQEU
Genmab A/S	22/05/2024	12:14:29	2,035.0000	1	AQEU
Genmab A/S	22/05/2024	12:14:29	2,035.0000	23	AQEU
Genmab A/S	22/05/2024	12:19:30	2,037.0000	25	CEUX
Genmab A/S	22/05/2024	12:19:30	2,037.0000	25	CEUX
Genmab A/S	22/05/2024	12:19:30	2,037.0000	25	CEUX
Genmab A/S	22/05/2024	12:19:30	2,037.0000	4	CEUX
Genmab A/S	22/05/2024	12:23:27	2,034.0000	42	XCSE
Genmab A/S	22/05/2024	12:23:27	2,034.0000	3	CEUX
Genmab A/S	22/05/2024	12:23:27	2,034.0000	40	CEUX
Genmab A/S	22/05/2024	12:32:24	2,032.0000	7	AQEU
Genmab A/S	22/05/2024	12:34:04	2,032.0000	71	CEUX
Genmab A/S	22/05/2024	12:34:04	2,032.0000	55	CEUX
Genmab A/S	22/05/2024	12:34:04	2,032.0000	3	AQEU
Genmab A/S	22/05/2024	12:34:04	2,032.0000	12	TQEX
Genmab A/S	22/05/2024	12:34:04	2,032.0000	80	XCSE
Genmab A/S	22/05/2024	12:36:56	2,032.0000	53	XCSE
Genmab A/S	22/05/2024	12:41:09	2,033.0000	51	CEUX
Genmab A/S	22/05/2024	12:47:05	2,037.0000	2	CEUX
Genmab A/S	22/05/2024	12:47:05	2,037.0000	39	CEUX
Genmab A/S	22/05/2024	12:47:05	2,037.0000	7	TQEX
Genmab A/S	22/05/2024	12:47:05	2,037.0000	45	XCSE
Genmab A/S	22/05/2024	12:47:05	2,037.0000	6	TQEX
Genmab A/S	22/05/2024	12:47:43	2,035.0000	50	CEUX
Genmab A/S	22/05/2024	12:47:43	2,035.0000	53	XCSE
Genmab A/S	22/05/2024	12:56:26	2,036.0000	65	CEUX
Genmab A/S	22/05/2024	12:56:26	2,036.0000	9	AQEU
Genmab A/S	22/05/2024	12:56:26	2,036.0000	10	TQEX
Genmab A/S	22/05/2024	12:56:26	2,036.0000	71	XCSE
Genmab A/S	22/05/2024	13:01:58	2,037.0000	45	CEUX
Genmab A/S	22/05/2024	13:03:03	2,037.0000	18	AQEU
Genmab A/S	22/05/2024	13:04:32	2,037.0000	7	AQEU
Genmab A/S	22/05/2024	13:04:43	2,037.0000	19	AQEU
Genmab A/S	22/05/2024	13:06:04	2,037.0000	7	AQEU
Genmab A/S	22/05/2024	13:07:43	2,039.0000	22	CEUX
Genmab A/S	22/05/2024	13:07:43	2,039.0000	16	CEUX
Genmab A/S	22/05/2024	13:09:00	2,038.0000	25	AQEU
Genmab A/S	22/05/2024	13:09:00	2,038.0000	7	AQEU

25

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	13:09:00	2,038.0000	3	AQEU
Genmab A/S	22/05/2024	13:09:00	2,038.0000	37	AQEU
Genmab A/S	22/05/2024	13:09:31	2,037.0000	39	TQEX
Genmab A/S	22/05/2024	13:12:34	2,037.0000	50	XCSE
Genmab A/S	22/05/2024	13:14:02	2,038.0000	19	XCSE
Genmab A/S	22/05/2024	13:14:07	2,038.0000	59	XCSE
Genmab A/S	22/05/2024	13:21:53	2,040.0000	11	XCSE
Genmab A/S	22/05/2024	13:21:53	2,040.0000	41	XCSE
Genmab A/S	22/05/2024	13:21:53	2,040.0000	52	XCSE
Genmab A/S	22/05/2024	13:22:03	2,039.0000	19	XCSE
Genmab A/S	22/05/2024	13:22:54	2,039.0000	33	XCSE
Genmab A/S	22/05/2024	13:26:43	2,039.0000	30	XCSE
Genmab A/S	22/05/2024	13:29:23	2,040.0000	69	CEUX
Genmab A/S	22/05/2024	13:29:23	2,040.0000	38	AQEU
Genmab A/S	22/05/2024	13:29:23	2,040.0000	8	AQEU
Genmab A/S	22/05/2024	13:35:16	2,040.0000	42	XCSE
Genmab A/S	22/05/2024	13:39:48	2,038.0000	37	CEUX
Genmab A/S	22/05/2024	13:39:48	2,038.0000	37	CEUX
Genmab A/S	22/05/2024	13:46:08	2,038.0000	35	XCSE
Genmab A/S	22/05/2024	13:46:19	2,038.0000	14	XCSE
Genmab A/S	22/05/2024	13:51:49	2,038.0000	44	XCSE
Genmab A/S	22/05/2024	13:51:49	2,038.0000	44	XCSE
Genmab A/S	22/05/2024	13:51:49	2,038.0000	10	XCSE
Genmab A/S	22/05/2024	13:51:49	2,038.0000	49	CEUX
Genmab A/S	22/05/2024	13:51:49	2,038.0000	47	CEUX
Genmab A/S	22/05/2024	13:56:02	2,040.0000	14	CEUX
Genmab A/S	22/05/2024	13:56:02	2,040.0000	2	CEUX
Genmab A/S	22/05/2024	13:56:02	2,040.0000	34	CEUX
Genmab A/S	22/05/2024	13:56:02	2,040.0000	53	CEUX
Genmab A/S	22/05/2024	14:04:34	2,039.0000	45	CEUX
Genmab A/S	22/05/2024	14:05:21	2,038.0000	24	XCSE
Genmab A/S	22/05/2024	14:05:22	2,038.0000	24	XCSE
Genmab A/S	22/05/2024	14:05:22	2,038.0000	24	XCSE
Genmab A/S	22/05/2024	14:05:22	2,038.0000	15	XCSE
Genmab A/S	22/05/2024	14:08:44	2,038.0000	27	XCSE
Genmab A/S	22/05/2024	14:08:44	2,038.0000	25	XCSE
Genmab A/S	22/05/2024	14:15:01	2,040.0000	48	XCSE
Genmab A/S	22/05/2024	14:15:01	2,040.0000	43	CEUX
Genmab A/S	22/05/2024	14:15:01	2,040.0000	7	TQEX
Genmab A/S	22/05/2024	14:15:01	2,040.0000	6	AQEU

26

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	14:30:22	2,045.0000	22	XCSE
Genmab A/S	22/05/2024	14:30:22	2,045.0000	22	XCSE
Genmab A/S	22/05/2024	14:30:22	2,045.0000	22	XCSE
Genmab A/S	22/05/2024	14:30:22	2,045.0000	22	XCSE
Genmab A/S	22/05/2024	14:30:22	2,045.0000	7	XCSE
Genmab A/S	22/05/2024	14:30:22	2,045.0000	6	XCSE
Genmab A/S	22/05/2024	14:44:46	2,049.0000	18	CEUX
Genmab A/S	22/05/2024	14:44:46	2,049.0000	9	CEUX
Genmab A/S	22/05/2024	14:44:46	2,049.0000	1	XCSE
Genmab A/S	22/05/2024	14:44:46	2,049.0000	11	XCSE
Genmab A/S	22/05/2024	14:45:02	2,048.0000	19	XCSE
Genmab A/S	22/05/2024	14:45:02	2,048.0000	5	XCSE
Genmab A/S	22/05/2024	14:45:02	2,048.0000	56	XCSE
Genmab A/S	22/05/2024	14:45:02	2,048.0000	29	XCSE
Genmab A/S	22/05/2024	14:45:02	2,048.0000	24	XCSE
Genmab A/S	22/05/2024	14:47:00	2,048.0000	49	CEUX
Genmab A/S	22/05/2024	14:50:33	2,047.0000	9	XCSE
Genmab A/S	22/05/2024	14:50:33	2,047.0000	46	XCSE
Genmab A/S	22/05/2024	14:52:26	2,047.0000	49	XCSE
Genmab A/S	22/05/2024	14:54:10	2,039.0000	59	XCSE
Genmab A/S	22/05/2024	14:58:04	2,040.0000	50	CEUX
Genmab A/S	22/05/2024	14:58:04	2,040.0000	52	XCSE
Genmab A/S	22/05/2024	15:07:00	2,042.0000	81	XCSE
Genmab A/S	22/05/2024	15:09:34	2,043.0000	46	CEUX
Genmab A/S	22/05/2024	15:14:35	2,046.0000	35	XCSE
Genmab A/S	22/05/2024	15:15:02	2,045.0000	5	CEUX
Genmab A/S	22/05/2024	15:15:02	2,045.0000	31	CEUX
Genmab A/S	22/05/2024	15:15:02	2,045.0000	43	CEUX
Genmab A/S	22/05/2024	15:15:02	2,045.0000	6	AQEU
Genmab A/S	22/05/2024	15:15:02	2,045.0000	7	TQEX
Genmab A/S	22/05/2024	15:15:02	2,045.0000	48	XCSE
Genmab A/S	22/05/2024	15:15:37	2,043.0000	53	XCSE
Genmab A/S	22/05/2024	15:19:09	2,043.0000	4	AQEU
Genmab A/S	22/05/2024	15:19:10	2,043.0000	50	XCSE
Genmab A/S	22/05/2024	15:19:10	2,043.0000	28	CEUX
Genmab A/S	22/05/2024	15:19:10	2,043.0000	3	AQEU
Genmab A/S	22/05/2024	15:19:10	2,043.0000	17	CEUX
Genmab A/S	22/05/2024	15:19:10	2,043.0000	7	TQEX
Genmab A/S	22/05/2024	15:19:14	2,042.0000	6	TQEX
Genmab A/S	22/05/2024	15:19:15	2,042.0000	32	TQEX

27

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	15:19:15	2,042.0000	14	TQEX
Genmab A/S	22/05/2024	15:29:42	2,040.0000	43	XCSE
Genmab A/S	22/05/2024	15:29:42	2,040.0000	38	CEUX
Genmab A/S	22/05/2024	15:29:42	2,040.0000	5	CEUX
Genmab A/S	22/05/2024	15:29:42	2,040.0000	6	AQEU
Genmab A/S	22/05/2024	15:32:51	2,041.0000	8	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	8	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	3	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	2	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	3	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	2	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	9	CEUX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	9	CEUX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	9	CEUX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	8	CEUX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	1	AQEU
Genmab A/S	22/05/2024	15:32:51	2,041.0000	5	TQEX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	5	TQEX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	5	TQEX
Genmab A/S	22/05/2024	15:32:51	2,041.0000	5	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	3	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	8	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	4	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	23	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	23	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	23	XCSE
Genmab A/S	22/05/2024	15:32:51	2,041.0000	3	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	9	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	9	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	9	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	9	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	27	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	24	XCSE
Genmab A/S	22/05/2024	15:34:16	2,041.0000	41	CEUX
Genmab A/S	22/05/2024	15:34:16	2,041.0000	41	CEUX
Genmab A/S	22/05/2024	15:41:31	2,050.0000	79	XCSE
Genmab A/S	22/05/2024	15:41:31	2,050.0000	20	XCSE
Genmab A/S	22/05/2024	15:41:31	2,050.0000	27	XCSE
Genmab A/S	22/05/2024	15:41:31	2,050.0000	55	XCSE
Genmab A/S	22/05/2024	15:41:31	2,050.0000	20	XCSE

28

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	15:41:31	2,050.0000	35	XCSE
Genmab A/S	22/05/2024	15:41:31	2,050.0000	8	XCSE
Genmab A/S	22/05/2024	15:41:31	2,050.0000	2	AQEU
Genmab A/S	22/05/2024	15:41:31	2,050.0000	20	CEUX
Genmab A/S	22/05/2024	15:41:31	2,050.0000	37	CEUX
Genmab A/S	22/05/2024	15:41:31	2,050.0000	20	CEUX
Genmab A/S	22/05/2024	15:41:31	2,050.0000	2	AQEU
Genmab A/S	22/05/2024	15:41:31	2,050.0000	5	TQEX
Genmab A/S	22/05/2024	15:54:30	2,056.0000	68	CEUX
Genmab A/S	22/05/2024	15:54:30	2,055.0000	4	AQEU
Genmab A/S	22/05/2024	15:54:30	2,055.0000	1	AQEU
Genmab A/S	22/05/2024	15:54:30	2,055.0000	51	XCSE
Genmab A/S	22/05/2024	15:56:23	2,055.0000	16	XCSE
Genmab A/S	22/05/2024	15:56:23	2,055.0000	41	XCSE
Genmab A/S	22/05/2024	15:56:23	2,055.0000	52	CEUX
Genmab A/S	22/05/2024	15:56:23	2,055.0000	8	AQEU
Genmab A/S	22/05/2024	15:56:23	2,055.0000	8	TQEX
Genmab A/S	22/05/2024	15:57:14	2,055.0000	10	XCSE
Genmab A/S	22/05/2024	15:57:14	2,055.0000	20	XCSE
Genmab A/S	22/05/2024	15:57:14	2,055.0000	10	XCSE
Genmab A/S	22/05/2024	15:57:19	2,055.0000	10	XCSE
Genmab A/S	22/05/2024	15:57:19	2,055.0000	20	XCSE
Genmab A/S	22/05/2024	15:57:19	2,055.0000	10	XCSE
Genmab A/S	22/05/2024	16:03:41	2,058.0000	7	XCSE
Genmab A/S	22/05/2024	16:03:41	2,058.0000	10	XCSE
Genmab A/S	22/05/2024	16:03:41	2,058.0000	10	XCSE
Genmab A/S	22/05/2024	16:06:34	2,057.0000	10	XCSE
Genmab A/S	22/05/2024	16:06:34	2,057.0000	10	XCSE
Genmab A/S	22/05/2024	16:07:32	2,057.0000	10	XCSE
Genmab A/S	22/05/2024	16:07:32	2,057.0000	10	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	4	CEUX
Genmab A/S	22/05/2024	16:08:08	2,057.0000	41	CEUX
Genmab A/S	22/05/2024	16:08:08	2,057.0000	7	AQEU
Genmab A/S	22/05/2024	16:08:08	2,057.0000	6	TQEX
Genmab A/S	22/05/2024	16:08:08	2,057.0000	9	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	14	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	11	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	25	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	25	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	13	XCSE

29

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	16:08:08	2,057.0000	25	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	18	XCSE
Genmab A/S	22/05/2024	16:08:08	2,057.0000	55	XCSE
Genmab A/S	22/05/2024	16:16:02	2,064.0000	21	XCSE
Genmab A/S	22/05/2024	16:16:02	2,064.0000	21	XCSE
Genmab A/S	22/05/2024	16:16:02	2,064.0000	57	XCSE
Genmab A/S	22/05/2024	16:16:02	2,064.0000	21	XCSE
Genmab A/S	22/05/2024	16:16:02	2,064.0000	18	XCSE
Genmab A/S	22/05/2024	16:16:47	2,063.0000	22	XCSE
Genmab A/S	22/05/2024	16:16:47	2,063.0000	22	XCSE
Genmab A/S	22/05/2024	16:16:47	2,063.0000	5	XCSE
Genmab A/S	22/05/2024	16:16:47	2,063.0000	5	XCSE
Genmab A/S	22/05/2024	16:16:47	2,063.0000	12	XCSE
Genmab A/S	22/05/2024	16:16:48	2,063.0000	22	XCSE
Genmab A/S	22/05/2024	16:16:48	2,063.0000	60	XCSE
Genmab A/S	22/05/2024	16:21:08	2,063.0000	84	CEUX
Genmab A/S	22/05/2024	16:21:14	2,062.0000	20	XCSE
Genmab A/S	22/05/2024	16:21:14	2,062.0000	19	CEUX
Genmab A/S	22/05/2024	16:21:14	2,062.0000	19	CEUX
Genmab A/S	22/05/2024	16:21:14	2,062.0000	6	CEUX
Genmab A/S	22/05/2024	16:21:14	2,062.0000	17	CEUX
Genmab A/S	22/05/2024	16:21:14	2,062.0000	3	AQEU
Genmab A/S	22/05/2024	16:21:14	2,062.0000	7	XCSE
Genmab A/S	22/05/2024	16:21:14	2,062.0000	13	XCSE
Genmab A/S	22/05/2024	16:21:14	2,062.0000	13	XCSE
Genmab A/S	22/05/2024	16:21:14	2,062.0000	33	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	6	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	29	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	XCSE
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	CEUX
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	CEUX
Genmab A/S	22/05/2024	16:25:28	2,064.0000	18	CEUX
Genmab A/S	22/05/2024	16:25:28	2,064.0000	17	CEUX
Genmab A/S	22/05/2024	16:25:28	2,064.0000	3	AQEU
Genmab A/S	22/05/2024	16:25:28	2,064.0000	7	AQEU
Genmab A/S	22/05/2024	16:25:28	2,064.0000	4	TQEX
Genmab A/S	22/05/2024	16:25:28	2,064.0000	8	XCSE

30

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	16:25:44	2,064.0000	11	XCSE
Genmab A/S	22/05/2024	16:25:44	2,064.0000	32	XCSE
Genmab A/S	22/05/2024	16:25:44	2,064.0000	35	XCSE
Genmab A/S	22/05/2024	16:25:44	2,064.0000	8	XCSE
Genmab A/S	22/05/2024	16:25:44	2,064.0000	13	XCSE
Genmab A/S	22/05/2024	16:26:07	2,061.0000	10	XCSE
Genmab A/S	22/05/2024	16:26:07	2,061.0000	15	XCSE
Genmab A/S	22/05/2024	16:26:07	2,061.0000	10	XCSE
Genmab A/S	22/05/2024	16:26:07	2,061.0000	52	XCSE
Genmab A/S	22/05/2024	16:29:56	2,062.0000	53	XCSE
Genmab A/S	22/05/2024	16:29:56	2,062.0000	81	XCSE
Genmab A/S	22/05/2024	16:29:56	2,062.0000	41	TQEX
Genmab A/S	22/05/2024	16:36:14	2,065.0000	52	CEUX
Genmab A/S	22/05/2024	16:36:14	2,065.0000	8	AQEU
Genmab A/S	22/05/2024	16:36:14	2,065.0000	8	TQEX
Genmab A/S	22/05/2024	16:36:14	2,065.0000	57	XCSE
Genmab A/S	22/05/2024	16:37:43	2,064.0000	61	XCSE
Genmab A/S	22/05/2024	16:38:02	2,064.0000	13	XCSE
Genmab A/S	22/05/2024	16:38:59	2,063.0000	58	CEUX
Genmab A/S	22/05/2024	16:38:59	2,063.0000	65	XCSE
Genmab A/S	22/05/2024	16:38:59	2,063.0000	9	TQEX
Genmab A/S	22/05/2024	16:38:59	2,063.0000	9	XCSE
Genmab A/S	22/05/2024	16:41:14	2,062.0000	15	XCSE
Genmab A/S	22/05/2024	16:41:14	2,062.0000	44	XCSE
Genmab A/S	22/05/2024	16:41:14	2,062.0000	6	XCSE
Genmab A/S	22/05/2024	16:41:14	2,062.0000	1	TQEX
Genmab A/S	22/05/2024	16:41:14	2,062.0000	7	TQEX
Genmab A/S	22/05/2024	16:41:14	2,062.0000	1	TQEX
Genmab A/S	22/05/2024	16:41:14	2,062.0000	58	CEUX
Genmab A/S	22/05/2024	16:41:14	2,062.0000	9	XCSE
Genmab A/S	22/05/2024	16:41:15	2,061.0000	20	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	20	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	20	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	6	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	13	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	7	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	20	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	11	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	3	AQEU
Genmab A/S	22/05/2024	16:41:15	2,061.0000	3	AQEU

31

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	16:41:15	2,061.0000	3	AQEU
Genmab A/S	22/05/2024	16:41:15	2,061.0000	4	TQEX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	6	TQEX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	4	TQEX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	36	CEUX
Genmab A/S	22/05/2024	16:41:15	2,061.0000	7	AQEU
Genmab A/S	22/05/2024	16:41:15	2,061.0000	8	TQEX
Genmab A/S	22/05/2024	16:41:16	2,061.0000	48	XCSE
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	14	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	1	CEUX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	15	XCSE
Genmab A/S	22/05/2024	16:45:27	2,062.0000	219	XCSE
Genmab A/S	22/05/2024	16:45:27	2,062.0000	4	TQEX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	36	TQEX
Genmab A/S	22/05/2024	16:45:27	2,062.0000	35	XCSE
Genmab A/S	22/05/2024	16:45:27	2,062.0000	3	XCSE
Genmab A/S	22/05/2024	16:45:29	2,061.0000	25	CEUX
Genmab A/S	22/05/2024	16:45:29	2,061.0000	25	CEUX
Genmab A/S	22/05/2024	16:45:29	2,061.0000	1	CEUX
Genmab A/S	22/05/2024	16:45:29	2,061.0000	25	CEUX
Genmab A/S	22/05/2024	16:45:29	2,061.0000	13	CEUX
Genmab A/S	22/05/2024	16:46:40	2,057.0000	41	XCSE
Genmab A/S	22/05/2024	16:51:29	2,058.0000	2	CEUX
Genmab A/S	22/05/2024	16:51:29	2,058.0000	12	CEUX
Genmab A/S	22/05/2024	16:51:29	2,058.0000	5	CEUX
Genmab A/S	22/05/2024	16:51:29	2,058.0000	16	CEUX

32

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	22/05/2024	16:51:39	2,058.0000	4	CEUX
Genmab A/S	22/05/2024	16:51:56	2,058.0000	13	CEUX
Genmab A/S	22/05/2024	16:51:56	2,058.0000	26	CEUX
Genmab A/S	22/05/2024	16:52:02	2,058.0000	12	CEUX
Genmab A/S	22/05/2024	16:52:02	2,058.0000	28	CEUX
Genmab A/S	22/05/2024	16:52:04	2,058.0000	162	XCSE
Genmab A/S	22/05/2024	16:52:07	2,058.0000	6	XCSE
Genmab A/S	22/05/2024	16:52:46	2,058.0000	81	XCSE
Genmab A/S	22/05/2024	16:52:46	2,058.0000	42	XCSE
Genmab A/S	22/05/2024	16:53:08	2,059.0000	5	XCSE
Genmab A/S	22/05/2024	16:53:24	2,059.0000	28	XCSE
Genmab A/S	22/05/2024	16:53:24	2,059.0000	14	XCSE
Genmab A/S	22/05/2024	16:53:24	2,059.0000	43	CEUX
Genmab A/S	22/05/2024	16:53:24	2,059.0000	6	AQEU
Genmab A/S	22/05/2024	16:53:24	2,059.0000	7	TQEX
Genmab A/S	24/05/2024	09:00:04	2,017.0000	4	XCSE
Genmab A/S	24/05/2024	09:00:04	2,017.0000	57	XCSE
Genmab A/S	24/05/2024	09:00:04	2,017.0000	65	XCSE
Genmab A/S	24/05/2024	09:00:09	2,013.0000	7	XCSE
Genmab A/S	24/05/2024	09:00:09	2,013.0000	29	XCSE
Genmab A/S	24/05/2024	09:01:13	2,002.0000	19	CEUX
Genmab A/S	24/05/2024	09:01:13	2,002.0000	18	CEUX
Genmab A/S	24/05/2024	09:05:58	1,986.0000	38	XCSE
Genmab A/S	24/05/2024	09:05:58	1,985.0000	37	XCSE
Genmab A/S	24/05/2024	09:07:02	1,979.0000	38	XCSE
Genmab A/S	24/05/2024	09:08:38	1,980.0000	40	CEUX
Genmab A/S	24/05/2024	09:10:33	1,981.0000	35	AQEU
Genmab A/S	24/05/2024	09:11:07	1,977.0000	35	XCSE
Genmab A/S	24/05/2024	09:13:32	1,968.5000	39	XCSE
Genmab A/S	24/05/2024	09:15:19	1,966.5000	34	CEUX
Genmab A/S	24/05/2024	09:15:21	1,963.0000	15	XCSE
Genmab A/S	24/05/2024	09:15:21	1,963.0000	20	XCSE
Genmab A/S	24/05/2024	09:17:05	1,962.5000	40	CEUX
Genmab A/S	24/05/2024	09:20:00	1,964.5000	19	XCSE
Genmab A/S	24/05/2024	09:20:00	1,964.5000	15	XCSE
Genmab A/S	24/05/2024	09:21:04	1,961.5000	41	CEUX
Genmab A/S	24/05/2024	09:21:38	1,959.0000	36	XCSE
Genmab A/S	24/05/2024	09:25:05	1,969.5000	35	CEUX
Genmab A/S	24/05/2024	09:25:06	1,969.5000	4	CEUX
Genmab A/S	24/05/2024	09:25:25	1,965.5000	36	TQEX

33

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	09:28:05	1,958.0000	30	CEUX
Genmab A/S	24/05/2024	09:28:05	1,958.0000	13	CEUX
Genmab A/S	24/05/2024	09:30:11	1,955.5000	41	XCSE
Genmab A/S	24/05/2024	09:32:38	1,957.5000	35	CEUX
Genmab A/S	24/05/2024	09:34:25	1,955.0000	37	CEUX
Genmab A/S	24/05/2024	09:36:36	1,957.5000	19	CEUX
Genmab A/S	24/05/2024	09:36:36	1,957.5000	24	CEUX
Genmab A/S	24/05/2024	09:38:35	1,955.0000	35	CEUX
Genmab A/S	24/05/2024	09:38:35	1,952.5000	35	XCSE
Genmab A/S	24/05/2024	09:42:42	1,951.0000	40	XCSE
Genmab A/S	24/05/2024	09:44:32	1,952.0000	39	CEUX
Genmab A/S	24/05/2024	09:47:02	1,952.0000	37	XCSE
Genmab A/S	24/05/2024	09:50:04	1,950.5000	20	CEUX
Genmab A/S	24/05/2024	09:50:04	1,950.5000	21	CEUX
Genmab A/S	24/05/2024	09:52:11	1,950.0000	41	XCSE
Genmab A/S	24/05/2024	09:53:06	1,948.0000	37	XCSE
Genmab A/S	24/05/2024	09:53:06	1,947.0000	10	XCSE
Genmab A/S	24/05/2024	09:53:06	1,947.0000	26	XCSE
Genmab A/S	24/05/2024	09:57:46	1,949.0000	11	XCSE
Genmab A/S	24/05/2024	09:57:46	1,949.0000	1	XCSE
Genmab A/S	24/05/2024	09:57:46	1,949.0000	23	XCSE
Genmab A/S	24/05/2024	10:00:04	1,948.5000	31	TQEX
Genmab A/S	24/05/2024	10:00:38	1,946.5000	25	CEUX
Genmab A/S	24/05/2024	10:00:38	1,946.5000	11	AQEU
Genmab A/S	24/05/2024	10:02:02	1,942.0000	6	XCSE
Genmab A/S	24/05/2024	10:02:02	1,942.0000	35	XCSE
Genmab A/S	24/05/2024	10:03:09	1,944.5000	40	CEUX
Genmab A/S	24/05/2024	10:03:09	1,944.5000	2	CEUX
Genmab A/S	24/05/2024	10:03:43	1,944.5000	10	XCSE
Genmab A/S	24/05/2024	10:03:43	1,944.5000	8	XCSE
Genmab A/S	24/05/2024	10:03:43	1,944.5000	27	XCSE
Genmab A/S	24/05/2024	10:04:11	1,945.5000	44	XCSE
Genmab A/S	24/05/2024	10:05:02	1,945.0000	11	CEUX
Genmab A/S	24/05/2024	10:05:02	1,945.0000	26	CEUX
Genmab A/S	24/05/2024	10:06:09	1,944.5000	19	CEUX
Genmab A/S	24/05/2024	10:06:09	1,944.5000	17	CEUX
Genmab A/S	24/05/2024	10:06:50	1,944.5000	43	CEUX
Genmab A/S	24/05/2024	10:06:50	1,943.5000	37	XCSE
Genmab A/S	24/05/2024	10:06:50	1,943.5000	20	CEUX
Genmab A/S	24/05/2024	10:08:11	1,945.5000	40	CEUX

34

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	10:08:45	1,943.0000	20	CEUX
Genmab A/S	24/05/2024	10:08:45	1,943.0000	21	CEUX
Genmab A/S	24/05/2024	10:09:27	1,942.5000	19	XCSE
Genmab A/S	24/05/2024	10:09:27	1,942.5000	22	XCSE
Genmab A/S	24/05/2024	10:10:29	1,942.0000	37	CEUX
Genmab A/S	24/05/2024	10:11:29	1,941.5000	18	CEUX
Genmab A/S	24/05/2024	10:11:29	1,941.5000	19	CEUX
Genmab A/S	24/05/2024	10:11:50	1,940.5000	19	CEUX
Genmab A/S	24/05/2024	10:11:50	1,940.5000	13	CEUX
Genmab A/S	24/05/2024	10:11:50	1,940.5000	10	CEUX
Genmab A/S	24/05/2024	10:12:23	1,938.0000	45	CEUX
Genmab A/S	24/05/2024	10:13:17	1,936.5000	51	CEUX
Genmab A/S	24/05/2024	10:14:21	1,933.5000	19	XCSE
Genmab A/S	24/05/2024	10:14:21	1,933.5000	27	XCSE
Genmab A/S	24/05/2024	10:15:09	1,932.0000	15	CEUX
Genmab A/S	24/05/2024	10:15:09	1,932.0000	38	CEUX
Genmab A/S	24/05/2024	10:15:38	1,929.5000	40	CEUX
Genmab A/S	24/05/2024	10:16:54	1,927.5000	7	TQEX
Genmab A/S	24/05/2024	10:17:04	1,928.0000	37	TQEX
Genmab A/S	24/05/2024	10:18:12	1,928.5000	29	CEUX
Genmab A/S	24/05/2024	10:18:12	1,928.5000	12	CEUX
Genmab A/S	24/05/2024	10:18:30	1,927.5000	19	AQEU
Genmab A/S	24/05/2024	10:18:49	1,927.5000	19	AQEU
Genmab A/S	24/05/2024	10:18:49	1,927.5000	17	AQEU
Genmab A/S	24/05/2024	10:19:42	1,927.5000	40	CEUX
Genmab A/S	24/05/2024	10:20:25	1,927.0000	19	CEUX
Genmab A/S	24/05/2024	10:20:25	1,927.0000	25	CEUX
Genmab A/S	24/05/2024	10:22:03	1,926.5000	34	XCSE
Genmab A/S	24/05/2024	10:22:03	1,926.5000	4	XCSE
Genmab A/S	24/05/2024	10:22:03	1,926.5000	32	XCSE
Genmab A/S	24/05/2024	10:22:44	1,924.5000	14	CEUX
Genmab A/S	24/05/2024	10:22:44	1,924.5000	20	CEUX
Genmab A/S	24/05/2024	10:23:39	1,926.0000	23	XCSE
Genmab A/S	24/05/2024	10:23:57	1,926.0000	39	XCSE
Genmab A/S	24/05/2024	10:24:49	1,928.0000	44	XCSE
Genmab A/S	24/05/2024	10:24:53	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:26:07	1,923.5000	35	CEUX
Genmab A/S	24/05/2024	10:26:08	1,923.0000	35	CEUX
Genmab A/S	24/05/2024	10:27:35	1,925.0000	5	CEUX
Genmab A/S	24/05/2024	10:27:35	1,925.0000	39	CEUX

35

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	10:28:27	1,922.5000	23	XCSE
Genmab A/S	24/05/2024	10:29:12	1,925.5000	35	XCSE
Genmab A/S	24/05/2024	10:29:46	1,925.0000	26	CEUX
Genmab A/S	24/05/2024	10:29:46	1,925.0000	9	CEUX
Genmab A/S	24/05/2024	10:31:00	1,924.5000	37	CEUX
Genmab A/S	24/05/2024	10:31:00	1,924.5000	8	AQEU
Genmab A/S	24/05/2024	10:31:41	1,924.5000	42	XCSE
Genmab A/S	24/05/2024	10:32:27	1,923.5000	39	AQEU
Genmab A/S	24/05/2024	10:32:27	1,922.5000	36	XCSE
Genmab A/S	24/05/2024	10:32:27	1,922.5000	3	XCSE
Genmab A/S	24/05/2024	10:34:24	1,924.0000	43	CEUX
Genmab A/S	24/05/2024	10:34:29	1,923.0000	44	XCSE
Genmab A/S	24/05/2024	10:34:55	1,920.0000	35	XCSE
Genmab A/S	24/05/2024	10:36:29	1,921.5000	38	XCSE
Genmab A/S	24/05/2024	10:36:52	1,921.5000	39	XCSE
Genmab A/S	24/05/2024	10:37:52	1,921.5000	19	XCSE
Genmab A/S	24/05/2024	10:37:52	1,921.5000	18	XCSE
Genmab A/S	24/05/2024	10:39:15	1,921.5000	39	CEUX
Genmab A/S	24/05/2024	10:39:15	1,921.5000	34	TQEX
Genmab A/S	24/05/2024	10:39:37	1,918.5000	40	CEUX
Genmab A/S	24/05/2024	10:41:10	1,918.5000	36	XCSE
Genmab A/S	24/05/2024	10:41:29	1,917.0000	42	CEUX
Genmab A/S	24/05/2024	10:42:47	1,918.0000	39	CEUX
Genmab A/S	24/05/2024	10:43:55	1,918.5000	36	XCSE
Genmab A/S	24/05/2024	10:44:33	1,919.0000	12	TQEX
Genmab A/S	24/05/2024	10:44:53	1,921.0000	12	AQEU
Genmab A/S	24/05/2024	10:45:08	1,920.5000	19	AQEU
Genmab A/S	24/05/2024	10:45:29	1,920.5000	35	AQEU
Genmab A/S	24/05/2024	10:45:37	1,920.0000	35	XCSE
Genmab A/S	24/05/2024	10:46:22	1,919.5000	40	XCSE
Genmab A/S	24/05/2024	10:46:47	1,916.5000	35	CEUX
Genmab A/S	24/05/2024	10:48:24	1,909.0000	10	XCSE
Genmab A/S	24/05/2024	10:49:11	1,914.5000	20	XCSE
Genmab A/S	24/05/2024	10:49:11	1,914.5000	33	XCSE
Genmab A/S	24/05/2024	10:49:11	1,914.5000	47	XCSE
Genmab A/S	24/05/2024	10:49:13	1,914.0000	25	XCSE
Genmab A/S	24/05/2024	10:50:27	1,923.0000	20	XCSE
Genmab A/S	24/05/2024	10:50:28	1,923.0000	20	XCSE
Genmab A/S	24/05/2024	10:50:28	1,923.0000	18	XCSE
Genmab A/S	24/05/2024	10:50:28	1,923.0000	3	XCSE

36

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	10:50:30	1,923.0000	20	XCSE
Genmab A/S	24/05/2024	10:50:30	1,923.0000	21	XCSE
Genmab A/S	24/05/2024	10:50:31	1,923.0000	20	XCSE
Genmab A/S	24/05/2024	10:50:31	1,923.0000	21	XCSE
Genmab A/S	24/05/2024	10:50:31	1,923.0000	58	XCSE
Genmab A/S	24/05/2024	10:50:34	1,925.0000	19	XCSE
Genmab A/S	24/05/2024	10:50:34	1,925.0000	33	XCSE
Genmab A/S	24/05/2024	10:50:35	1,924.5000	10	CEUX
Genmab A/S	24/05/2024	10:50:35	1,924.5000	5	TQEX
Genmab A/S	24/05/2024	10:50:35	1,924.5000	10	XCSE
Genmab A/S	24/05/2024	10:50:38	1,925.5000	31	XCSE
Genmab A/S	24/05/2024	10:50:38	1,925.5000	69	XCSE
Genmab A/S	24/05/2024	10:50:38	1,925.5000	31	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	35	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	3	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	35	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	38	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	14	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	24	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	14	XCSE
Genmab A/S	24/05/2024	10:50:48	1,926.5000	37	XCSE
Genmab A/S	24/05/2024	10:50:53	1,925.5000	2	CEUX
Genmab A/S	24/05/2024	10:50:53	1,925.5000	8	CEUX
Genmab A/S	24/05/2024	10:50:53	1,925.5000	28	CEUX
Genmab A/S	24/05/2024	10:50:53	1,925.5000	4	CEUX
Genmab A/S	24/05/2024	10:50:53	1,925.5000	19	XCSE
Genmab A/S	24/05/2024	10:50:53	1,925.0000	52	XCSE
Genmab A/S	24/05/2024	10:50:53	1,925.0000	52	XCSE
Genmab A/S	24/05/2024	10:50:53	1,925.0000	9	XCSE
Genmab A/S	24/05/2024	10:51:03	1,923.0000	25	AQEU

37

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	10:51:03	1,923.0000	21	AQEU
Genmab A/S	24/05/2024	10:51:40	1,922.0000	6	XCSE
Genmab A/S	24/05/2024	10:51:40	1,922.0000	3	XCSE
Genmab A/S	24/05/2024	10:51:40	1,922.0000	23	XCSE
Genmab A/S	24/05/2024	10:51:40	1,922.0000	6	XCSE
Genmab A/S	24/05/2024	10:51:41	1,921.5000	50	CEUX
Genmab A/S	24/05/2024	10:51:41	1,921.0000	10	XCSE
Genmab A/S	24/05/2024	10:51:41	1,921.0000	39	XCSE
Genmab A/S	24/05/2024	10:51:41	1,921.0000	49	XCSE
Genmab A/S	24/05/2024	10:51:41	1,921.0000	47	XCSE
Genmab A/S	24/05/2024	10:52:24	1,922.5000	55	XCSE
Genmab A/S	24/05/2024	10:52:24	1,922.5000	43	CEUX
Genmab A/S	24/05/2024	10:52:24	1,922.0000	48	XCSE
Genmab A/S	24/05/2024	10:52:24	1,922.0000	48	XCSE
Genmab A/S	24/05/2024	10:52:24	1,922.0000	50	XCSE
Genmab A/S	24/05/2024	10:53:02	1,926.0000	33	CEUX
Genmab A/S	24/05/2024	10:53:02	1,926.0000	47	XCSE
Genmab A/S	24/05/2024	10:53:02	1,926.0000	20	CEUX
Genmab A/S	24/05/2024	10:53:12	1,927.5000	11	XCSE
Genmab A/S	24/05/2024	10:53:12	1,927.5000	12	XCSE
Genmab A/S	24/05/2024	10:53:16	1,927.0000	40	XCSE
Genmab A/S	24/05/2024	10:53:16	1,927.0000	16	XCSE
Genmab A/S	24/05/2024	10:53:32	1,927.0000	48	XCSE
Genmab A/S	24/05/2024	10:53:32	1,927.0000	54	XCSE
Genmab A/S	24/05/2024	10:53:34	1,926.0000	50	CEUX
Genmab A/S	24/05/2024	10:53:34	1,926.0000	8	CEUX
Genmab A/S	24/05/2024	10:53:34	1,926.0000	6	AQEU
Genmab A/S	24/05/2024	10:53:38	1,926.5000	75	XCSE
Genmab A/S	24/05/2024	10:53:57	1,927.0000	46	XCSE
Genmab A/S	24/05/2024	10:53:57	1,926.5000	37	CEUX
Genmab A/S	24/05/2024	10:54:37	1,927.5000	31	XCSE
Genmab A/S	24/05/2024	10:54:37	1,927.5000	19	XCSE
Genmab A/S	24/05/2024	10:54:37	1,927.5000	7	XCSE
Genmab A/S	24/05/2024	10:54:37	1,927.5000	54	CEUX
Genmab A/S	24/05/2024	10:54:38	1,926.0000	19	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	7	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	4	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	7	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	15	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	7	XCSE

38

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	10:54:38	1,926.0000	19	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	7	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	26	XCSE
Genmab A/S	24/05/2024	10:54:38	1,926.0000	24	XCSE
Genmab A/S	24/05/2024	10:54:46	1,925.5000	53	XCSE
Genmab A/S	24/05/2024	10:55:00	1,925.0000	20	XCSE
Genmab A/S	24/05/2024	10:55:02	1,925.0000	11	XCSE
Genmab A/S	24/05/2024	10:55:02	1,925.0000	1	XCSE
Genmab A/S	24/05/2024	10:55:02	1,925.0000	31	XCSE
Genmab A/S	24/05/2024	10:55:03	1,925.0000	20	XCSE
Genmab A/S	24/05/2024	10:55:09	1,923.5000	50	XCSE
Genmab A/S	24/05/2024	10:55:10	1,923.5000	17	XCSE
Genmab A/S	24/05/2024	10:55:51	1,924.5000	41	XCSE
Genmab A/S	24/05/2024	10:55:51	1,924.5000	18	XCSE
Genmab A/S	24/05/2024	10:55:51	1,924.5000	4	XCSE
Genmab A/S	24/05/2024	10:55:51	1,924.5000	22	XCSE
Genmab A/S	24/05/2024	10:55:51	1,924.5000	22	XCSE
Genmab A/S	24/05/2024	10:56:04	1,924.5000	22	XCSE
Genmab A/S	24/05/2024	10:56:04	1,924.5000	13	AQEU
Genmab A/S	24/05/2024	10:56:14	1,925.0000	23	XCSE
Genmab A/S	24/05/2024	10:56:14	1,925.0000	24	XCSE
Genmab A/S	24/05/2024	10:56:14	1,925.0000	32	XCSE
Genmab A/S	24/05/2024	10:56:14	1,925.0000	62	XCSE
Genmab A/S	24/05/2024	10:56:14	1,925.0000	24	XCSE
Genmab A/S	24/05/2024	10:56:14	1,925.0000	7	XCSE
Genmab A/S	24/05/2024	10:56:55	1,927.0000	61	AQEU
Genmab A/S	24/05/2024	10:56:55	1,927.0000	21	TQEX
Genmab A/S	24/05/2024	10:56:55	1,927.0000	21	TQEX
Genmab A/S	24/05/2024	10:56:55	1,927.0000	11	TQEX
Genmab A/S	24/05/2024	10:56:59	1,926.0000	20	XCSE
Genmab A/S	24/05/2024	10:56:59	1,926.0000	25	XCSE
Genmab A/S	24/05/2024	10:57:49	1,928.5000	23	XCSE
Genmab A/S	24/05/2024	10:57:49	1,928.5000	66	XCSE
Genmab A/S	24/05/2024	10:57:49	1,928.5000	28	CEUX
Genmab A/S	24/05/2024	10:57:49	1,928.5000	28	CEUX
Genmab A/S	24/05/2024	10:57:49	1,928.5000	20	CEUX
Genmab A/S	24/05/2024	10:58:01	1,927.5000	47	CEUX
Genmab A/S	24/05/2024	10:58:08	1,926.5000	35	CEUX
Genmab A/S	24/05/2024	10:58:44	1,928.0000	41	XCSE
Genmab A/S	24/05/2024	10:58:44	1,928.0000	1	XCSE

39

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	10:58:44	1,928.0000	36	XCSE
Genmab A/S	24/05/2024	10:58:44	1,928.0000	75	XCSE
Genmab A/S	24/05/2024	10:58:59	1,927.0000	37	CEUX
Genmab A/S	24/05/2024	10:58:59	1,927.0000	39	XCSE
Genmab A/S	24/05/2024	10:59:22	1,927.5000	25	CEUX
Genmab A/S	24/05/2024	10:59:22	1,927.5000	19	CEUX
Genmab A/S	24/05/2024	10:59:22	1,927.5000	6	CEUX
Genmab A/S	24/05/2024	10:59:22	1,927.5000	20	CEUX
Genmab A/S	24/05/2024	11:00:04	1,929.5000	40	XCSE
Genmab A/S	24/05/2024	11:00:04	1,929.5000	25	XCSE
Genmab A/S	24/05/2024	11:00:04	1,929.5000	36	XCSE
Genmab A/S	24/05/2024	11:00:04	1,929.5000	25	XCSE
Genmab A/S	24/05/2024	11:00:04	1,929.5000	16	XCSE
Genmab A/S	24/05/2024	11:00:04	1,929.5000	15	XCSE
Genmab A/S	24/05/2024	11:00:10	1,928.5000	38	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	12	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	11	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	11	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	12	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	23	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	27	CEUX
Genmab A/S	24/05/2024	11:00:58	1,926.5000	38	CEUX
Genmab A/S	24/05/2024	11:00:58	1,926.5000	21	CEUX
Genmab A/S	24/05/2024	11:00:58	1,926.5000	27	CEUX
Genmab A/S	24/05/2024	11:00:58	1,926.5000	2	CEUX
Genmab A/S	24/05/2024	11:00:58	1,926.5000	23	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	7	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	6	XCSE
Genmab A/S	24/05/2024	11:00:58	1,926.5000	6	XCSE
Genmab A/S	24/05/2024	11:01:11	1,924.0000	37	XCSE
Genmab A/S	24/05/2024	11:01:52	1,924.0000	35	XCSE
Genmab A/S	24/05/2024	11:01:52	1,924.0000	36	XCSE
Genmab A/S	24/05/2024	11:01:52	1,924.0000	34	XCSE
Genmab A/S	24/05/2024	11:01:52	1,924.0000	34	CEUX
Genmab A/S	24/05/2024	11:01:52	1,925.0000	38	CEUX
Genmab A/S	24/05/2024	11:02:02	1,925.5000	35	TQEX
Genmab A/S	24/05/2024	11:02:23	1,923.5000	35	XCSE
Genmab A/S	24/05/2024	11:02:23	1,923.5000	36	CEUX
Genmab A/S	24/05/2024	11:02:37	1,924.0000	20	XCSE
Genmab A/S	24/05/2024	11:02:37	1,924.0000	36	CEUX

40

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	11:03:14	1,924.5000	25	AQEU
Genmab A/S	24/05/2024	11:03:14	1,924.5000	11	AQEU
Genmab A/S	24/05/2024	11:03:40	1,925.0000	35	CEUX
Genmab A/S	24/05/2024	11:03:40	1,924.0000	40	XCSE
Genmab A/S	24/05/2024	11:04:39	1,921.5000	39	XCSE
Genmab A/S	24/05/2024	11:04:39	1,921.5000	36	CEUX
Genmab A/S	24/05/2024	11:05:17	1,918.5000	36	CEUX
Genmab A/S	24/05/2024	11:05:17	1,918.5000	2	CEUX
Genmab A/S	24/05/2024	11:06:20	1,922.0000	40	XCSE
Genmab A/S	24/05/2024	11:06:32	1,921.5000	16	CEUX
Genmab A/S	24/05/2024	11:06:32	1,921.5000	19	CEUX
Genmab A/S	24/05/2024	11:06:32	1,921.5000	35	CEUX
Genmab A/S	24/05/2024	11:06:47	1,922.5000	38	CEUX
Genmab A/S	24/05/2024	11:07:02	1,922.5000	37	CEUX
Genmab A/S	24/05/2024	11:08:02	1,922.5000	37	XCSE
Genmab A/S	24/05/2024	11:08:02	1,922.5000	38	XCSE
Genmab A/S	24/05/2024	11:09:02	1,926.5000	39	XCSE
Genmab A/S	24/05/2024	11:09:02	1,926.5000	35	CEUX
Genmab A/S	24/05/2024	11:09:05	1,927.0000	36	AQEU
Genmab A/S	24/05/2024	11:09:59	1,927.5000	43	XCSE
Genmab A/S	24/05/2024	11:09:59	1,927.5000	39	CEUX
Genmab A/S	24/05/2024	11:11:08	1,927.5000	38	XCSE
Genmab A/S	24/05/2024	11:11:08	1,927.5000	39	TQEX
Genmab A/S	24/05/2024	11:11:08	1,927.5000	2	TQEX
Genmab A/S	24/05/2024	11:11:09	1,925.5000	36	XCSE
Genmab A/S	24/05/2024	11:12:24	1,930.5000	38	XCSE
Genmab A/S	24/05/2024	11:12:24	1,930.5000	12	XCSE
Genmab A/S	24/05/2024	11:12:24	1,930.5000	25	XCSE
Genmab A/S	24/05/2024	11:12:49	1,930.5000	37	XCSE
Genmab A/S	24/05/2024	11:12:49	1,930.5000	2	XCSE
Genmab A/S	24/05/2024	11:13:57	1,930.0000	19	CEUX
Genmab A/S	24/05/2024	11:13:57	1,930.0000	18	CEUX
Genmab A/S	24/05/2024	11:13:57	1,930.0000	23	XCSE
Genmab A/S	24/05/2024	11:13:57	1,930.0000	17	XCSE
Genmab A/S	24/05/2024	11:14:17	1,933.5000	36	XCSE
Genmab A/S	24/05/2024	11:14:17	1,933.5000	9	AQEU
Genmab A/S	24/05/2024	11:14:17	1,933.5000	29	AQEU
Genmab A/S	24/05/2024	11:14:57	1,933.0000	43	XCSE
Genmab A/S	24/05/2024	11:15:16	1,931.5000	39	XCSE
Genmab A/S	24/05/2024	11:16:02	1,933.0000	16	XCSE

41

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	11:16:02	1,933.0000	21	XCSE
Genmab A/S	24/05/2024	11:16:30	1,932.0000	37	AQEU
Genmab A/S	24/05/2024	11:17:26	1,932.5000	7	CEUX
Genmab A/S	24/05/2024	11:17:26	1,932.5000	27	CEUX
Genmab A/S	24/05/2024	11:17:26	1,932.5000	23	AQEU
Genmab A/S	24/05/2024	11:17:26	1,932.5000	15	AQEU
Genmab A/S	24/05/2024	11:17:26	1,932.5000	35	XCSE
Genmab A/S	24/05/2024	11:18:05	1,932.0000	38	XCSE
Genmab A/S	24/05/2024	11:18:06	1,930.5000	37	CEUX
Genmab A/S	24/05/2024	11:19:32	1,933.0000	76	CEUX
Genmab A/S	24/05/2024	11:19:32	1,933.0000	37	AQEU
Genmab A/S	24/05/2024	11:20:23	1,933.0000	37	XCSE
Genmab A/S	24/05/2024	11:20:27	1,931.0000	36	CEUX
Genmab A/S	24/05/2024	11:20:57	1,933.0000	34	XCSE
Genmab A/S	24/05/2024	11:21:47	1,931.5000	36	CEUX
Genmab A/S	24/05/2024	11:21:47	1,931.5000	38	CEUX
Genmab A/S	24/05/2024	11:22:21	1,930.0000	38	CEUX
Genmab A/S	24/05/2024	11:23:27	1,932.0000	44	CEUX
Genmab A/S	24/05/2024	11:23:27	1,932.0000	17	AQEU
Genmab A/S	24/05/2024	11:23:27	1,932.0000	23	AQEU
Genmab A/S	24/05/2024	11:24:44	1,932.0000	43	XCSE
Genmab A/S	24/05/2024	11:24:44	1,932.0000	40	CEUX
Genmab A/S	24/05/2024	11:24:44	1,931.0000	41	XCSE
Genmab A/S	24/05/2024	11:24:44	1,930.5000	41	CEUX
Genmab A/S	24/05/2024	11:26:06	1,930.0000	45	XCSE
Genmab A/S	24/05/2024	11:27:07	1,931.0000	12	CEUX
Genmab A/S	24/05/2024	11:27:07	1,931.0000	27	CEUX
Genmab A/S	24/05/2024	11:27:07	1,930.5000	33	CEUX
Genmab A/S	24/05/2024	11:27:07	1,930.5000	10	CEUX
Genmab A/S	24/05/2024	11:28:06	1,930.5000	30	CEUX
Genmab A/S	24/05/2024	11:28:06	1,930.5000	15	CEUX
Genmab A/S	24/05/2024	11:28:06	1,930.5000	46	CEUX
Genmab A/S	24/05/2024	11:28:50	1,929.0000	43	XCSE
Genmab A/S	24/05/2024	11:28:51	1,926.5000	35	CEUX
Genmab A/S	24/05/2024	11:28:51	1,926.5000	15	TQEX
Genmab A/S	24/05/2024	11:28:51	1,926.5000	25	TQEX
Genmab A/S	24/05/2024	11:28:51	1,927.0000	41	CEUX
Genmab A/S	24/05/2024	11:28:51	1,927.0000	33	XCSE
Genmab A/S	24/05/2024	11:28:51	1,927.0000	8	XCSE
Genmab A/S	24/05/2024	11:31:02	1,925.0000	37	XCSE

42

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	11:31:36	1,922.5000	45	XCSE
Genmab A/S	24/05/2024	11:31:58	1,922.0000	44	AQEU
Genmab A/S	24/05/2024	11:33:12	1,919.0000	19	CEUX
Genmab A/S	24/05/2024	11:33:12	1,919.0000	24	CEUX
Genmab A/S	24/05/2024	11:33:54	1,920.0000	6	AQEU
Genmab A/S	24/05/2024	11:33:54	1,920.0000	41	AQEU
Genmab A/S	24/05/2024	11:34:20	1,921.0000	41	XCSE
Genmab A/S	24/05/2024	11:34:27	1,920.5000	48	CEUX
Genmab A/S	24/05/2024	11:34:58	1,918.0000	49	CEUX
Genmab A/S	24/05/2024	11:36:17	1,920.5000	50	XCSE
Genmab A/S	24/05/2024	11:36:17	1,920.5000	8	XCSE
Genmab A/S	24/05/2024	11:36:17	1,920.5000	47	CEUX
Genmab A/S	24/05/2024	11:37:02	1,919.5000	19	CEUX
Genmab A/S	24/05/2024	11:37:02	1,919.5000	8	CEUX
Genmab A/S	24/05/2024	11:37:02	1,919.5000	13	CEUX
Genmab A/S	24/05/2024	11:37:43	1,919.0000	35	XCSE
Genmab A/S	24/05/2024	11:37:55	1,920.0000	38	AQEU
Genmab A/S	24/05/2024	11:39:00	1,919.0000	39	CEUX
Genmab A/S	24/05/2024	11:39:00	1,919.0000	36	CEUX
Genmab A/S	24/05/2024	11:39:15	1,918.0000	35	CEUX
Genmab A/S	24/05/2024	11:40:30	1,921.0000	40	XCSE
Genmab A/S	24/05/2024	11:40:30	1,921.0000	42	CEUX
Genmab A/S	24/05/2024	11:40:31	1,920.0000	41	XCSE
Genmab A/S	24/05/2024	11:41:11	1,920.5000	11	CEUX
Genmab A/S	24/05/2024	11:41:11	1,920.5000	28	CEUX
Genmab A/S	24/05/2024	11:41:48	1,920.0000	29	AQEU
Genmab A/S	24/05/2024	11:42:50	1,921.0000	35	AQEU
Genmab A/S	24/05/2024	11:42:51	1,921.0000	19	CEUX
Genmab A/S	24/05/2024	11:43:02	1,921.0000	11	TQEX
Genmab A/S	24/05/2024	11:43:02	1,921.0000	23	TQEX
Genmab A/S	24/05/2024	11:43:02	1,921.0000	34	XCSE
Genmab A/S	24/05/2024	11:43:41	1,921.0000	43	XCSE
Genmab A/S	24/05/2024	11:44:01	1,920.0000	42	XCSE
Genmab A/S	24/05/2024	11:44:03	1,918.5000	41	XCSE
Genmab A/S	24/05/2024	11:44:04	1,917.5000	45	TQEX
Genmab A/S	24/05/2024	11:45:30	1,915.0000	17	XCSE
Genmab A/S	24/05/2024	11:46:02	1,915.0000	37	XCSE
Genmab A/S	24/05/2024	11:46:43	1,913.5000	34	XCSE
Genmab A/S	24/05/2024	11:46:43	1,913.5000	2	XCSE
Genmab A/S	24/05/2024	11:46:43	1,913.5000	7	XCSE

43

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	11:47:51	1,913.5000	45	XCSE
Genmab A/S	24/05/2024	11:47:51	1,913.5000	24	CEUX
Genmab A/S	24/05/2024	11:47:51	1,913.5000	14	CEUX
Genmab A/S	24/05/2024	11:47:52	1,912.5000	34	CEUX
Genmab A/S	24/05/2024	11:48:33	1,913.5000	25	XCSE
Genmab A/S	24/05/2024	11:48:33	1,913.5000	19	XCSE
Genmab A/S	24/05/2024	11:49:02	1,912.5000	19	XCSE
Genmab A/S	24/05/2024	11:50:04	1,914.0000	27	XCSE
Genmab A/S	24/05/2024	11:50:04	1,914.0000	7	XCSE
Genmab A/S	24/05/2024	11:50:04	1,914.0000	37	XCSE
Genmab A/S	24/05/2024	11:50:09	1,912.5000	40	XCSE
Genmab A/S	24/05/2024	11:50:44	1,912.5000	37	CEUX
Genmab A/S	24/05/2024	11:51:07	1,911.5000	25	CEUX
Genmab A/S	24/05/2024	11:52:05	1,912.0000	1	XCSE
Genmab A/S	24/05/2024	11:52:23	1,912.0000	43	XCSE
Genmab A/S	24/05/2024	11:52:23	1,912.0000	37	XCSE
Genmab A/S	24/05/2024	11:52:36	1,909.5000	6	CEUX
Genmab A/S	24/05/2024	11:52:36	1,909.5000	14	CEUX
Genmab A/S	24/05/2024	11:52:36	1,909.5000	21	CEUX
Genmab A/S	24/05/2024	11:53:57	1,915.0000	37	CEUX
Genmab A/S	24/05/2024	11:53:57	1,915.0000	38	XCSE
Genmab A/S	24/05/2024	11:55:07	1,914.5000	35	CEUX
Genmab A/S	24/05/2024	11:55:07	1,914.5000	45	CEUX
Genmab A/S	24/05/2024	11:56:21	1,914.0000	38	CEUX
Genmab A/S	24/05/2024	11:56:21	1,914.0000	38	CEUX
Genmab A/S	24/05/2024	11:56:21	1,914.0000	37	CEUX
Genmab A/S	24/05/2024	11:57:16	1,913.5000	46	CEUX
Genmab A/S	24/05/2024	11:57:16	1,913.5000	39	XCSE
Genmab A/S	24/05/2024	11:58:31	1,916.0000	51	XCSE
Genmab A/S	24/05/2024	11:58:31	1,916.0000	39	XCSE
Genmab A/S	24/05/2024	11:58:55	1,915.0000	35	XCSE
Genmab A/S	24/05/2024	11:59:30	1,914.5000	22	XCSE
Genmab A/S	24/05/2024	11:59:30	1,914.5000	14	XCSE
Genmab A/S	24/05/2024	12:00:09	1,913.5000	36	XCSE
Genmab A/S	24/05/2024	12:00:28	1,913.5000	17	CEUX
Genmab A/S	24/05/2024	12:00:28	1,913.5000	24	CEUX
Genmab A/S	24/05/2024	12:01:09	1,913.0000	36	CEUX
Genmab A/S	24/05/2024	12:01:09	1,913.0000	4	CEUX
Genmab A/S	24/05/2024	12:01:09	1,913.0000	38	TQEX
Genmab A/S	24/05/2024	12:01:24	1,910.0000	38	CEUX

44

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	12:01:24	1,910.5000	36	TQEX
Genmab A/S	24/05/2024	12:01:24	1,910.5000	37	XCSE
Genmab A/S	24/05/2024	12:01:24	1,910.0000	34	XCSE
Genmab A/S	24/05/2024	12:03:43	1,909.0000	16	CEUX
Genmab A/S	24/05/2024	12:03:43	1,909.0000	2	CEUX
Genmab A/S	24/05/2024	12:03:43	1,909.0000	2	CEUX
Genmab A/S	24/05/2024	12:03:43	1,909.0000	26	CEUX
Genmab A/S	24/05/2024	12:04:24	1,909.0000	37	XCSE
Genmab A/S	24/05/2024	12:04:27	1,907.5000	53	CEUX
Genmab A/S	24/05/2024	12:06:48	1,909.5000	24	XCSE
Genmab A/S	24/05/2024	12:06:48	1,909.5000	24	XCSE
Genmab A/S	24/05/2024	12:06:48	1,909.5000	21	XCSE
Genmab A/S	24/05/2024	12:07:27	1,908.5000	76	XCSE
Genmab A/S	24/05/2024	12:07:27	1,908.5000	17	XCSE
Genmab A/S	24/05/2024	12:07:27	1,908.5000	19	XCSE
Genmab A/S	24/05/2024	12:07:27	1,908.5000	2	XCSE
Genmab A/S	24/05/2024	12:08:54	1,911.5000	45	CEUX
Genmab A/S	24/05/2024	12:08:54	1,911.5000	80	XCSE
Genmab A/S	24/05/2024	12:10:12	1,912.5000	36	CEUX
Genmab A/S	24/05/2024	12:10:12	1,912.5000	19	AQEU
Genmab A/S	24/05/2024	12:10:12	1,912.5000	23	AQEU
Genmab A/S	24/05/2024	12:10:57	1,911.5000	37	XCSE
Genmab A/S	24/05/2024	12:11:15	1,912.0000	42	CEUX
Genmab A/S	24/05/2024	12:11:53	1,912.0000	5	CEUX
Genmab A/S	24/05/2024	12:12:02	1,912.0000	35	CEUX
Genmab A/S	24/05/2024	12:12:48	1,912.5000	42	XCSE
Genmab A/S	24/05/2024	12:12:48	1,912.5000	36	CEUX
Genmab A/S	24/05/2024	12:13:08	1,911.0000	21	XCSE
Genmab A/S	24/05/2024	12:13:08	1,911.0000	15	XCSE
Genmab A/S	24/05/2024	12:13:49	1,911.0000	39	CEUX
Genmab A/S	24/05/2024	12:14:23	1,914.5000	34	AQEU
Genmab A/S	24/05/2024	12:15:06	1,915.0000	42	XCSE
Genmab A/S	24/05/2024	12:15:06	1,915.0000	36	XCSE
Genmab A/S	24/05/2024	12:15:06	1,914.0000	36	CEUX
Genmab A/S	24/05/2024	12:15:56	1,912.5000	34	CEUX
Genmab A/S	24/05/2024	12:16:42	1,912.0000	5	AQEU
Genmab A/S	24/05/2024	12:16:42	1,912.0000	6	AQEU
Genmab A/S	24/05/2024	12:16:42	1,912.0000	28	AQEU
Genmab A/S	24/05/2024	12:17:28	1,912.0000	36	XCSE
Genmab A/S	24/05/2024	12:17:28	1,912.0000	39	XCSE

45

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	12:17:28	1,911.0000	38	XCSE
Genmab A/S	24/05/2024	12:17:28	1,911.0000	41	TQEX
Genmab A/S	24/05/2024	12:19:19	1,911.0000	38	XCSE
Genmab A/S	24/05/2024	12:20:25	1,910.0000	12	CEUX
Genmab A/S	24/05/2024	12:20:35	1,910.0000	24	CEUX
Genmab A/S	24/05/2024	12:20:35	1,910.0000	45	CEUX
Genmab A/S	24/05/2024	12:20:52	1,911.0000	17	CEUX
Genmab A/S	24/05/2024	12:20:55	1,911.0000	40	XCSE
Genmab A/S	24/05/2024	12:22:44	1,910.5000	39	XCSE
Genmab A/S	24/05/2024	12:22:44	1,910.5000	69	CEUX
Genmab A/S	24/05/2024	12:22:44	1,910.5000	45	CEUX
Genmab A/S	24/05/2024	12:24:02	1,910.0000	42	CEUX
Genmab A/S	24/05/2024	12:24:02	1,910.0000	27	AQEU
Genmab A/S	24/05/2024	12:24:02	1,910.0000	12	AQEU
Genmab A/S	24/05/2024	12:24:49	1,911.0000	14	CEUX
Genmab A/S	24/05/2024	12:24:54	1,911.0000	42	XCSE
Genmab A/S	24/05/2024	12:24:54	1,911.0000	30	CEUX
Genmab A/S	24/05/2024	12:25:38	1,911.5000	20	AQEU
Genmab A/S	24/05/2024	12:25:38	1,911.5000	28	AQEU
Genmab A/S	24/05/2024	12:26:50	1,915.0000	6	CEUX
Genmab A/S	24/05/2024	12:26:50	1,915.0000	43	CEUX
Genmab A/S	24/05/2024	12:26:50	1,915.0000	39	TQEX
Genmab A/S	24/05/2024	12:28:38	1,914.0000	37	XCSE
Genmab A/S	24/05/2024	12:28:38	1,914.0000	47	CEUX
Genmab A/S	24/05/2024	12:29:36	1,913.0000	41	XCSE
Genmab A/S	24/05/2024	12:29:36	1,913.0000	39	AQEU
Genmab A/S	24/05/2024	12:29:51	1,912.5000	46	XCSE
Genmab A/S	24/05/2024	12:31:06	1,915.0000	35	XCSE
Genmab A/S	24/05/2024	12:31:06	1,915.0000	46	CEUX
Genmab A/S	24/05/2024	12:31:09	1,915.0000	39	XCSE
Genmab A/S	24/05/2024	12:33:19	1,915.5000	37	XCSE
Genmab A/S	24/05/2024	12:33:27	1,915.0000	39	XCSE
Genmab A/S	24/05/2024	12:33:27	1,915.0000	27	CEUX
Genmab A/S	24/05/2024	12:33:28	1,915.0000	13	CEUX
Genmab A/S	24/05/2024	12:33:28	1,915.0000	14	CEUX
Genmab A/S	24/05/2024	12:33:28	1,915.0000	19	CEUX
Genmab A/S	24/05/2024	12:33:49	1,912.0000	2	XCSE
Genmab A/S	24/05/2024	12:33:49	1,912.0000	36	XCSE
Genmab A/S	24/05/2024	12:33:49	1,914.0000	40	XCSE
Genmab A/S	24/05/2024	12:33:49	1,914.0000	1	XCSE

46

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	12:33:49	1,911.5000	35	TQEX
Genmab A/S	24/05/2024	12:33:49	1,911.5000	36	XCSE
Genmab A/S	24/05/2024	12:36:02	1,911.0000	12	CEUX
Genmab A/S	24/05/2024	12:36:02	1,911.0000	27	CEUX
Genmab A/S	24/05/2024	12:36:02	1,910.5000	34	CEUX
Genmab A/S	24/05/2024	12:36:02	1,910.5000	16	CEUX
Genmab A/S	24/05/2024	12:36:02	1,910.5000	20	CEUX
Genmab A/S	24/05/2024	12:36:03	1,910.0000	35	CEUX
Genmab A/S	24/05/2024	12:36:03	1,910.0000	38	TQEX
Genmab A/S	24/05/2024	12:39:03	1,913.5000	6	XCSE
Genmab A/S	24/05/2024	12:39:03	1,913.5000	47	XCSE
Genmab A/S	24/05/2024	12:39:03	1,913.5000	38	XCSE
Genmab A/S	24/05/2024	12:39:25	1,912.0000	43	XCSE
Genmab A/S	24/05/2024	12:40:21	1,912.0000	19	CEUX
Genmab A/S	24/05/2024	12:40:21	1,912.0000	24	CEUX
Genmab A/S	24/05/2024	12:41:02	1,911.5000	39	CEUX
Genmab A/S	24/05/2024	12:41:02	1,911.5000	3	CEUX
Genmab A/S	24/05/2024	12:41:02	1,911.5000	41	CEUX
Genmab A/S	24/05/2024	12:41:02	1,910.5000	37	CEUX
Genmab A/S	24/05/2024	12:41:02	1,910.5000	42	XCSE
Genmab A/S	24/05/2024	12:41:21	1,908.0000	12	CEUX
Genmab A/S	24/05/2024	12:41:21	1,908.0000	28	XCSE
Genmab A/S	24/05/2024	12:41:21	1,908.0000	25	CEUX
Genmab A/S	24/05/2024	12:41:21	1,908.0000	11	XCSE
Genmab A/S	24/05/2024	12:43:39	1,915.0000	37	XCSE
Genmab A/S	24/05/2024	12:44:23	1,918.5000	18	XCSE
Genmab A/S	24/05/2024	12:44:34	1,918.5000	35	AQEU
Genmab A/S	24/05/2024	12:45:01	1,917.5000	36	XCSE
Genmab A/S	24/05/2024	12:45:56	1,916.5000	41	XCSE
Genmab A/S	24/05/2024	12:46:36	1,915.5000	20	XCSE
Genmab A/S	24/05/2024	12:46:36	1,915.5000	18	XCSE
Genmab A/S	24/05/2024	12:46:36	1,915.5000	11	AQEU
Genmab A/S	24/05/2024	12:47:02	1,915.5000	39	AQEU
Genmab A/S	24/05/2024	12:47:37	1,915.5000	34	XCSE
Genmab A/S	24/05/2024	12:47:37	1,915.5000	38	XCSE
Genmab A/S	24/05/2024	12:48:03	1,913.5000	21	CEUX
Genmab A/S	24/05/2024	12:48:03	1,913.5000	16	TQEX
Genmab A/S	24/05/2024	12:48:03	1,914.0000	9	AQEU
Genmab A/S	24/05/2024	12:48:13	1,912.0000	13	AQEU
Genmab A/S	24/05/2024	12:49:02	1,910.5000	35	AQEU

47

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	12:49:02	1,910.5000	4	AQEU
Genmab A/S	24/05/2024	12:49:52	1,911.5000	36	XCSE
Genmab A/S	24/05/2024	12:49:52	1,911.5000	14	CEUX
Genmab A/S	24/05/2024	12:49:52	1,911.5000	26	CEUX
Genmab A/S	24/05/2024	12:50:50	1,913.0000	49	CEUX
Genmab A/S	24/05/2024	12:50:50	1,913.0000	36	CEUX
Genmab A/S	24/05/2024	12:51:26	1,912.0000	40	CEUX
Genmab A/S	24/05/2024	12:53:02	1,915.5000	42	XCSE
Genmab A/S	24/05/2024	12:53:02	1,915.5000	28	XCSE
Genmab A/S	24/05/2024	12:53:02	1,915.5000	8	XCSE
Genmab A/S	24/05/2024	12:53:49	1,914.0000	1	CEUX
Genmab A/S	24/05/2024	12:53:49	1,914.0000	40	CEUX
Genmab A/S	24/05/2024	12:53:49	1,914.0000	38	CEUX
Genmab A/S	24/05/2024	12:54:45	1,914.5000	36	XCSE
Genmab A/S	24/05/2024	12:54:45	1,914.5000	42	AQEU
Genmab A/S	24/05/2024	12:55:02	1,914.0000	41	CEUX
Genmab A/S	24/05/2024	12:56:03	1,913.0000	15	XCSE
Genmab A/S	24/05/2024	12:57:17	1,913.0000	42	XCSE
Genmab A/S	24/05/2024	12:57:17	1,913.0000	18	XCSE
Genmab A/S	24/05/2024	12:57:20	1,913.0000	41	XCSE
Genmab A/S	24/05/2024	12:58:13	1,914.5000	30	CEUX
Genmab A/S	24/05/2024	12:58:13	1,914.5000	6	CEUX
Genmab A/S	24/05/2024	12:58:13	1,914.5000	20	AQEU
Genmab A/S	24/05/2024	12:58:13	1,914.5000	37	XCSE
Genmab A/S	24/05/2024	13:00:04	1,914.5000	34	CEUX
Genmab A/S	24/05/2024	13:00:04	1,914.5000	36	XCSE
Genmab A/S	24/05/2024	13:00:55	1,915.0000	23	CEUX
Genmab A/S	24/05/2024	13:00:55	1,915.0000	29	CEUX
Genmab A/S	24/05/2024	13:00:55	1,915.0000	36	XCSE
Genmab A/S	24/05/2024	13:02:02	1,913.5000	40	XCSE
Genmab A/S	24/05/2024	13:02:02	1,913.5000	11	CEUX
Genmab A/S	24/05/2024	13:03:03	1,914.0000	81	XCSE
Genmab A/S	24/05/2024	13:03:27	1,914.0000	19	XCSE
Genmab A/S	24/05/2024	13:03:27	1,914.0000	21	XCSE
Genmab A/S	24/05/2024	13:03:59	1,914.0000	56	TQEX
Genmab A/S	24/05/2024	13:06:03	1,919.5000	43	XCSE
Genmab A/S	24/05/2024	13:06:03	1,919.5000	57	XCSE
Genmab A/S	24/05/2024	13:06:42	1,917.5000	56	AQEU
Genmab A/S	24/05/2024	13:06:42	1,917.5000	4	AQEU
Genmab A/S	24/05/2024	13:06:42	1,916.0000	38	AQEU

48

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	13:08:09	1,917.5000	48	XCSE
Genmab A/S	24/05/2024	13:08:09	1,917.5000	54	CEUX
Genmab A/S	24/05/2024	13:10:02	1,914.5000	47	AQEU
Genmab A/S	24/05/2024	13:10:02	1,914.5000	60	TQEX
Genmab A/S	24/05/2024	13:11:03	1,915.5000	40	CEUX
Genmab A/S	24/05/2024	13:11:03	1,915.5000	22	CEUX
Genmab A/S	24/05/2024	13:11:34	1,916.0000	58	CEUX
Genmab A/S	24/05/2024	13:12:44	1,918.0000	23	XCSE
Genmab A/S	24/05/2024	13:12:44	1,918.0000	23	XCSE
Genmab A/S	24/05/2024	13:12:44	1,918.0000	15	XCSE
Genmab A/S	24/05/2024	13:13:25	1,917.0000	60	AQEU
Genmab A/S	24/05/2024	13:13:48	1,918.0000	20	CEUX
Genmab A/S	24/05/2024	13:13:48	1,918.0000	2	CEUX
Genmab A/S	24/05/2024	13:13:48	1,918.0000	20	CEUX
Genmab A/S	24/05/2024	13:13:48	1,918.0000	17	CEUX
Genmab A/S	24/05/2024	13:15:01	1,917.5000	63	XCSE
Genmab A/S	24/05/2024	13:15:02	1,916.5000	44	CEUX
Genmab A/S	24/05/2024	13:16:16	1,918.0000	29	CEUX
Genmab A/S	24/05/2024	13:16:16	1,918.0000	28	CEUX
Genmab A/S	24/05/2024	13:17:03	1,918.5000	45	CEUX
Genmab A/S	24/05/2024	13:18:58	1,920.5000	26	CEUX
Genmab A/S	24/05/2024	13:18:58	1,920.5000	3	XCSE
Genmab A/S	24/05/2024	13:18:58	1,920.5000	44	XCSE
Genmab A/S	24/05/2024	13:18:58	1,920.5000	26	CEUX
Genmab A/S	24/05/2024	13:18:58	1,920.5000	16	CEUX
Genmab A/S	24/05/2024	13:19:15	1,919.5000	22	TQEX
Genmab A/S	24/05/2024	13:20:05	1,921.0000	42	XCSE
Genmab A/S	24/05/2024	13:20:05	1,921.0000	31	CEUX
Genmab A/S	24/05/2024	13:20:05	1,921.0000	12	CEUX
Genmab A/S	24/05/2024	13:21:02	1,921.0000	43	CEUX
Genmab A/S	24/05/2024	13:21:02	1,921.0000	36	XCSE
Genmab A/S	24/05/2024	13:21:02	1,921.0000	28	XCSE
Genmab A/S	24/05/2024	13:22:00	1,920.0000	45	XCSE
Genmab A/S	24/05/2024	13:22:00	1,920.5000	64	XCSE
Genmab A/S	24/05/2024	13:22:02	1,919.5000	42	XCSE
Genmab A/S	24/05/2024	13:22:03	1,919.5000	1	XCSE
Genmab A/S	24/05/2024	13:22:56	1,919.5000	63	CEUX
Genmab A/S	24/05/2024	13:23:02	1,918.0000	66	XCSE
Genmab A/S	24/05/2024	13:23:03	1,917.5000	19	CEUX
Genmab A/S	24/05/2024	13:24:03	1,915.5000	30	CEUX

49

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	13:24:03	1,915.5000	10	CEUX
Genmab A/S	24/05/2024	13:24:03	1,915.5000	14	AQEU
Genmab A/S	24/05/2024	13:24:03	1,915.5000	43	AQEU
Genmab A/S	24/05/2024	13:27:02	1,915.5000	42	CEUX
Genmab A/S	24/05/2024	13:27:04	1,915.5000	1	CEUX
Genmab A/S	24/05/2024	13:27:05	1,915.5000	34	XCSE
Genmab A/S	24/05/2024	13:28:08	1,915.5000	4	CEUX
Genmab A/S	24/05/2024	13:28:09	1,915.5000	21	CEUX
Genmab A/S	24/05/2024	13:28:10	1,915.5000	22	CEUX
Genmab A/S	24/05/2024	13:28:10	1,915.5000	21	XCSE
Genmab A/S	24/05/2024	13:29:02	1,915.5000	35	XCSE
Genmab A/S	24/05/2024	13:29:22	1,915.5000	21	CEUX
Genmab A/S	24/05/2024	13:30:08	1,915.5000	22	XCSE
Genmab A/S	24/05/2024	13:30:16	1,915.5000	19	CEUX
Genmab A/S	24/05/2024	13:30:27	1,915.5000	6	CEUX
Genmab A/S	24/05/2024	13:30:41	1,915.5000	24	CEUX
Genmab A/S	24/05/2024	13:31:43	1,915.5000	47	XCSE
Genmab A/S	24/05/2024	13:31:43	1,915.5000	36	XCSE
Genmab A/S	24/05/2024	13:31:43	1,915.5000	38	XCSE
Genmab A/S	24/05/2024	13:31:43	1,916.0000	39	XCSE
Genmab A/S	24/05/2024	13:31:43	1,916.0000	50	CEUX
Genmab A/S	24/05/2024	13:31:43	1,916.0000	46	CEUX
Genmab A/S	24/05/2024	13:31:43	1,916.0000	37	CEUX
Genmab A/S	24/05/2024	13:31:43	1,915.5000	45	CEUX
Genmab A/S	24/05/2024	13:35:04	1,911.5000	41	CEUX
Genmab A/S	24/05/2024	13:35:45	1,911.5000	47	XCSE
Genmab A/S	24/05/2024	13:36:48	1,912.0000	41	CEUX
Genmab A/S	24/05/2024	13:36:48	1,912.0000	6	AQEU
Genmab A/S	24/05/2024	13:36:48	1,912.0000	45	XCSE
Genmab A/S	24/05/2024	13:38:02	1,912.5000	39	XCSE
Genmab A/S	24/05/2024	13:38:02	1,912.5000	45	XCSE
Genmab A/S	24/05/2024	13:38:58	1,911.5000	25	CEUX
Genmab A/S	24/05/2024	13:39:02	1,911.5000	53	CEUX
Genmab A/S	24/05/2024	13:39:54	1,912.0000	47	XCSE
Genmab A/S	24/05/2024	13:40:10	1,912.0000	35	CEUX
Genmab A/S	24/05/2024	13:41:02	1,912.0000	39	XCSE
Genmab A/S	24/05/2024	13:41:02	1,912.0000	49	TQEX
Genmab A/S	24/05/2024	13:42:50	1,912.5000	38	CEUX
Genmab A/S	24/05/2024	13:42:50	1,912.5000	14	CEUX
Genmab A/S	24/05/2024	13:42:50	1,912.5000	20	CEUX

50

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	13:42:50	1,912.5000	44	XCSE
Genmab A/S	24/05/2024	13:42:58	1,912.5000	43	XCSE
Genmab A/S	24/05/2024	13:44:31	1,911.5000	36	CEUX
Genmab A/S	24/05/2024	13:44:31	1,911.5000	7	CEUX
Genmab A/S	24/05/2024	13:44:31	1,911.5000	12	CEUX
Genmab A/S	24/05/2024	13:44:31	1,911.5000	27	CEUX
Genmab A/S	24/05/2024	13:45:02	1,911.5000	57	CEUX
Genmab A/S	24/05/2024	13:45:24	1,911.5000	38	CEUX
Genmab A/S	24/05/2024	13:46:05	1,912.0000	22	CEUX
Genmab A/S	24/05/2024	13:46:05	1,912.0000	22	CEUX
Genmab A/S	24/05/2024	13:46:05	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	13:47:03	1,911.5000	34	CEUX
Genmab A/S	24/05/2024	13:48:01	1,912.0000	22	CEUX
Genmab A/S	24/05/2024	13:48:01	1,912.0000	1	CEUX
Genmab A/S	24/05/2024	13:48:01	1,912.0000	21	CEUX
Genmab A/S	24/05/2024	13:48:01	1,912.0000	1	CEUX
Genmab A/S	24/05/2024	13:48:01	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	13:48:01	1,912.0000	35	XCSE
Genmab A/S	24/05/2024	13:48:01	1,912.0000	1	XCSE
Genmab A/S	24/05/2024	13:48:02	1,911.5000	37	XCSE
Genmab A/S	24/05/2024	13:48:02	1,911.5000	27	XCSE
Genmab A/S	24/05/2024	13:49:02	1,911.0000	49	XCSE
Genmab A/S	24/05/2024	13:49:02	1,911.0000	2	XCSE
Genmab A/S	24/05/2024	13:49:02	1,911.0000	38	XCSE
Genmab A/S	24/05/2024	13:49:33	1,910.0000	58	CEUX
Genmab A/S	24/05/2024	13:49:33	1,910.0000	35	CEUX
Genmab A/S	24/05/2024	13:49:33	1,910.0000	61	XCSE
Genmab A/S	24/05/2024	13:49:33	1,909.5000	47	XCSE
Genmab A/S	24/05/2024	13:49:33	1,909.5000	36	XCSE
Genmab A/S	24/05/2024	13:54:08	1,907.5000	57	XCSE
Genmab A/S	24/05/2024	13:54:13	1,907.5000	44	XCSE
Genmab A/S	24/05/2024	13:54:13	1,907.5000	18	CEUX
Genmab A/S	24/05/2024	13:54:13	1,907.5000	19	CEUX
Genmab A/S	24/05/2024	13:56:34	1,911.5000	24	XCSE
Genmab A/S	24/05/2024	13:56:34	1,911.5000	20	XCSE
Genmab A/S	24/05/2024	13:56:34	1,911.5000	61	XCSE
Genmab A/S	24/05/2024	13:57:07	1,911.0000	46	XCSE
Genmab A/S	24/05/2024	13:57:40	1,911.0000	24	CEUX
Genmab A/S	24/05/2024	13:57:40	1,911.0000	24	CEUX
Genmab A/S	24/05/2024	13:57:40	1,911.0000	18	CEUX

51

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	13:58:52	1,909.5000	46	XCSE
Genmab A/S	24/05/2024	13:58:52	1,909.5000	21	TQEX
Genmab A/S	24/05/2024	13:58:52	1,909.5000	21	TQEX
Genmab A/S	24/05/2024	13:58:52	1,909.5000	21	TQEX
Genmab A/S	24/05/2024	13:58:52	1,909.5000	1	TQEX
Genmab A/S	24/05/2024	14:01:06	1,911.0000	44	CEUX
Genmab A/S	24/05/2024	14:01:06	1,911.0000	27	CEUX
Genmab A/S	24/05/2024	14:01:06	1,911.0000	22	XCSE
Genmab A/S	24/05/2024	14:01:07	1,911.0000	39	TQEX
Genmab A/S	24/05/2024	14:01:07	1,911.0000	22	XCSE
Genmab A/S	24/05/2024	14:01:07	1,911.0000	27	CEUX
Genmab A/S	24/05/2024	14:01:07	1,911.0000	12	CEUX
Genmab A/S	24/05/2024	14:01:07	1,911.0000	5	TQEX
Genmab A/S	24/05/2024	14:01:07	1,911.0000	19	XCSE
Genmab A/S	24/05/2024	14:01:08	1,910.5000	38	XCSE
Genmab A/S	24/05/2024	14:01:08	1,910.5000	13	XCSE
Genmab A/S	24/05/2024	14:03:59	1,910.5000	78	XCSE
Genmab A/S	24/05/2024	14:03:59	1,910.5000	51	CEUX
Genmab A/S	24/05/2024	14:06:02	1,914.5000	45	CEUX
Genmab A/S	24/05/2024	14:06:02	1,914.5000	23	CEUX
Genmab A/S	24/05/2024	14:06:02	1,914.5000	4	CEUX
Genmab A/S	24/05/2024	14:06:02	1,914.5000	43	CEUX
Genmab A/S	24/05/2024	14:06:02	1,914.5000	6	AQEU
Genmab A/S	24/05/2024	14:06:02	1,914.5000	47	XCSE
Genmab A/S	24/05/2024	14:06:42	1,914.5000	17	XCSE
Genmab A/S	24/05/2024	14:06:42	1,914.5000	28	XCSE
Genmab A/S	24/05/2024	14:07:50	1,913.5000	46	XCSE
Genmab A/S	24/05/2024	14:08:06	1,913.0000	35	AQEU
Genmab A/S	24/05/2024	14:09:26	1,912.0000	19	XCSE
Genmab A/S	24/05/2024	14:09:49	1,912.5000	18	CEUX
Genmab A/S	24/05/2024	14:09:52	1,912.5000	7	CEUX
Genmab A/S	24/05/2024	14:09:58	1,912.5000	23	CEUX
Genmab A/S	24/05/2024	14:11:25	1,914.0000	36	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	7	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	15	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	21	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	16	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	22	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	14	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	22	XCSE

52

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	14:11:25	1,914.0000	30	XCSE
Genmab A/S	24/05/2024	14:11:25	1,914.0000	2	XCSE
Genmab A/S	24/05/2024	14:11:25	1,913.5000	43	CEUX
Genmab A/S	24/05/2024	14:11:25	1,913.5000	22	CEUX
Genmab A/S	24/05/2024	14:12:29	1,912.0000	38	CEUX
Genmab A/S	24/05/2024	14:14:11	1,911.0000	61	XCSE
Genmab A/S	24/05/2024	14:14:51	1,912.0000	41	XCSE
Genmab A/S	24/05/2024	14:16:03	1,912.0000	22	CEUX
Genmab A/S	24/05/2024	14:16:35	1,912.0000	2	XCSE
Genmab A/S	24/05/2024	14:16:35	1,912.0000	66	XCSE
Genmab A/S	24/05/2024	14:16:35	1,912.0000	43	XCSE
Genmab A/S	24/05/2024	14:17:46	1,911.0000	31	CEUX
Genmab A/S	24/05/2024	14:17:54	1,911.0000	37	CEUX
Genmab A/S	24/05/2024	14:17:55	1,911.0000	44	CEUX
Genmab A/S	24/05/2024	14:18:44	1,912.0000	25	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	26	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	23	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	5	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	5	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	21	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	23	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	5	XCSE
Genmab A/S	24/05/2024	14:19:51	1,913.5000	11	XCSE
Genmab A/S	24/05/2024	14:20:37	1,913.0000	41	CEUX
Genmab A/S	24/05/2024	14:21:29	1,912.0000	37	CEUX
Genmab A/S	24/05/2024	14:21:29	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	14:21:29	1,912.0000	61	CEUX
Genmab A/S	24/05/2024	14:21:30	1,912.0000	72	XCSE
Genmab A/S	24/05/2024	14:21:30	1,912.0000	16	XCSE
Genmab A/S	24/05/2024	14:21:31	1,911.5000	88	XCSE
Genmab A/S	24/05/2024	14:21:31	1,911.5000	37	XCSE
Genmab A/S	24/05/2024	14:21:35	1,911.0000	41	TQEX
Genmab A/S	24/05/2024	14:23:50	1,913.0000	59	XCSE
Genmab A/S	24/05/2024	14:23:50	1,912.5000	39	AQEU
Genmab A/S	24/05/2024	14:27:38	1,911.5000	43	XCSE
Genmab A/S	24/05/2024	14:27:38	1,911.5000	52	XCSE
Genmab A/S	24/05/2024	14:27:38	1,911.5000	38	CEUX
Genmab A/S	24/05/2024	14:27:38	1,911.5000	6	TQEX
Genmab A/S	24/05/2024	14:27:38	1,911.5000	6	XCSE
Genmab A/S	24/05/2024	14:30:19	1,913.5000	19	CEUX

53

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	14:30:19	1,913.5000	17	XCSE
Genmab A/S	24/05/2024	14:30:38	1,912.5000	75	XCSE
Genmab A/S	24/05/2024	14:30:38	1,912.5000	44	XCSE
Genmab A/S	24/05/2024	14:30:38	1,912.5000	68	CEUX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	39	CEUX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	10	TQEX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	6	TQEX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	39	CEUX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	8	CEUX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	6	AQEU
Genmab A/S	24/05/2024	14:30:38	1,912.5000	44	XCSE
Genmab A/S	24/05/2024	14:30:38	1,912.5000	4	XCSE
Genmab A/S	24/05/2024	14:30:38	1,912.5000	31	CEUX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	10	CEUX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	6	TQEX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	4	TQEX
Genmab A/S	24/05/2024	14:30:38	1,912.5000	31	CEUX
Genmab A/S	24/05/2024	14:34:47	1,912.0000	89	CEUX
Genmab A/S	24/05/2024	14:34:47	1,912.0000	78	XCSE
Genmab A/S	24/05/2024	14:36:59	1,911.5000	24	CEUX
Genmab A/S	24/05/2024	14:37:26	1,912.0000	34	XCSE
Genmab A/S	24/05/2024	14:37:42	1,912.0000	10	XCSE
Genmab A/S	24/05/2024	14:37:42	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	1	AQEU
Genmab A/S	24/05/2024	14:37:42	1,912.0000	5	TQEX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	5	TQEX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	10	XCSE
Genmab A/S	24/05/2024	14:37:42	1,912.0000	71	XCSE
Genmab A/S	24/05/2024	14:37:42	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	14:37:42	1,912.0000	1	AQEU
Genmab A/S	24/05/2024	14:37:43	1,912.0000	27	XCSE
Genmab A/S	24/05/2024	14:40:01	1,912.5000	8	CEUX
Genmab A/S	24/05/2024	14:40:01	1,912.5000	66	CEUX
Genmab A/S	24/05/2024	14:40:01	1,912.5000	29	CEUX
Genmab A/S	24/05/2024	14:40:01	1,912.5000	15	CEUX
Genmab A/S	24/05/2024	14:40:01	1,912.5000	29	CEUX
Genmab A/S	24/05/2024	14:40:01	1,912.5000	7	CEUX

54

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	14:40:01	1,912.0000	83	XCSE
Genmab A/S	24/05/2024	14:40:01	1,912.0000	49	XCSE
Genmab A/S	24/05/2024	14:40:01	1,912.0000	49	XCSE
Genmab A/S	24/05/2024	14:40:01	1,912.0000	12	XCSE
Genmab A/S	24/05/2024	14:42:05	1,912.0000	49	XCSE
Genmab A/S	24/05/2024	14:42:05	1,912.0000	24	XCSE
Genmab A/S	24/05/2024	14:42:05	1,912.0000	49	XCSE
Genmab A/S	24/05/2024	14:42:31	1,911.5000	10	XCSE
Genmab A/S	24/05/2024	14:42:31	1,911.5000	10	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	9	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	1	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	10	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	2	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	5	TQEX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	10	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	2	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	1	AQEU
Genmab A/S	24/05/2024	14:42:31	1,911.5000	10	XCSE
Genmab A/S	24/05/2024	14:42:31	1,911.5000	10	XCSE
Genmab A/S	24/05/2024	14:42:31	1,911.5000	19	XCSE
Genmab A/S	24/05/2024	14:42:31	1,911.5000	26	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	26	CEUX
Genmab A/S	24/05/2024	14:42:31	1,911.5000	26	CEUX
Genmab A/S	24/05/2024	14:42:32	1,911.0000	48	XCSE
Genmab A/S	24/05/2024	14:42:32	1,911.0000	63	XCSE
Genmab A/S	24/05/2024	14:42:32	1,911.0000	5	TQEX
Genmab A/S	24/05/2024	14:42:32	1,911.0000	42	TQEX
Genmab A/S	24/05/2024	14:42:32	1,911.0000	3	TQEX
Genmab A/S	24/05/2024	14:42:32	1,911.0000	9	TQEX
Genmab A/S	24/05/2024	14:42:32	1,910.5000	77	XCSE
Genmab A/S	24/05/2024	14:42:32	1,910.5000	4	XCSE
Genmab A/S	24/05/2024	14:42:32	1,910.5000	31	XCSE
Genmab A/S	24/05/2024	14:42:32	1,910.5000	71	CEUX
Genmab A/S	24/05/2024	14:42:32	1,910.5000	3	CEUX
Genmab A/S	24/05/2024	14:42:32	1,910.5000	65	CEUX
Genmab A/S	24/05/2024	14:48:34	1,912.5000	73	XCSE
Genmab A/S	24/05/2024	14:48:34	1,912.5000	48	XCSE
Genmab A/S	24/05/2024	14:48:34	1,912.5000	48	XCSE
Genmab A/S	24/05/2024	14:48:35	1,912.5000	21	XCSE
Genmab A/S	24/05/2024	14:48:37	1,912.0000	44	XCSE

55

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	14:48:37	1,912.0000	76	XCSE
Genmab A/S	24/05/2024	14:48:39	1,912.0000	26	XCSE
Genmab A/S	24/05/2024	14:48:39	1,912.0000	18	XCSE
Genmab A/S	24/05/2024	14:54:23	1,912.5000	35	CEUX
Genmab A/S	24/05/2024	14:54:45	1,912.5000	3	CEUX
Genmab A/S	24/05/2024	14:54:45	1,912.5000	4	CEUX
Genmab A/S	24/05/2024	14:54:45	1,912.5000	22	CEUX
Genmab A/S	24/05/2024	14:54:45	1,912.5000	9	CEUX
Genmab A/S	24/05/2024	14:55:42	1,912.5000	8	TQEX
Genmab A/S	24/05/2024	14:55:42	1,912.5000	2	TQEX
Genmab A/S	24/05/2024	14:55:57	1,912.5000	2	TQEX
Genmab A/S	24/05/2024	14:56:02	1,912.5000	8	TQEX
Genmab A/S	24/05/2024	14:56:02	1,912.5000	1	TQEX
Genmab A/S	24/05/2024	14:56:17	1,912.5000	8	TQEX
Genmab A/S	24/05/2024	14:56:17	1,912.5000	1	TQEX
Genmab A/S	24/05/2024	14:56:17	1,912.5000	10	TQEX
Genmab A/S	24/05/2024	14:56:17	1,912.5000	16	XCSE
Genmab A/S	24/05/2024	14:56:50	1,911.5000	9	XCSE
Genmab A/S	24/05/2024	14:56:50	1,911.5000	27	XCSE
Genmab A/S	24/05/2024	14:56:50	1,911.5000	9	XCSE
Genmab A/S	24/05/2024	14:56:50	1,911.5000	27	XCSE
Genmab A/S	24/05/2024	14:56:50	1,911.5000	10	CEUX
Genmab A/S	24/05/2024	14:56:53	1,911.5000	10	CEUX
Genmab A/S	24/05/2024	14:56:55	1,911.5000	5	TQEX
Genmab A/S	24/05/2024	14:56:55	1,911.5000	10	CEUX
Genmab A/S	24/05/2024	14:56:55	1,911.5000	1	CEUX
Genmab A/S	24/05/2024	14:56:55	1,911.5000	9	XCSE
Genmab A/S	24/05/2024	14:56:55	1,911.5000	27	XCSE
Genmab A/S	24/05/2024	14:56:55	1,911.5000	5	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	27	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	24	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	21	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	6	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	24	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	12	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	24	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	24	XCSE
Genmab A/S	24/05/2024	14:57:21	1,911.5000	14	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	52	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	14	XCSE

56

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	14:57:26	1,910.5000	27	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	5	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	15	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	32	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	15	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	26	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	14	XCSE
Genmab A/S	24/05/2024	14:57:26	1,910.5000	4	XCSE
Genmab A/S	24/05/2024	14:59:34	1,908.5000	52	XCSE
Genmab A/S	24/05/2024	14:59:34	1,908.5000	52	XCSE
Genmab A/S	24/05/2024	14:59:34	1,908.5000	82	CEUX
Genmab A/S	24/05/2024	14:59:34	1,908.5000	80	CEUX
Genmab A/S	24/05/2024	14:59:34	1,908.5000	52	XCSE
Genmab A/S	24/05/2024	14:59:34	1,908.5000	52	XCSE
Genmab A/S	24/05/2024	14:59:34	1,908.5000	6	XCSE
Genmab A/S	24/05/2024	14:59:34	1,908.5000	6	XCSE
Genmab A/S	24/05/2024	15:04:07	1,911.0000	27	XCSE
Genmab A/S	24/05/2024	15:04:07	1,911.0000	20	XCSE
Genmab A/S	24/05/2024	15:04:07	1,911.0000	27	XCSE
Genmab A/S	24/05/2024	15:04:07	1,911.0000	60	XCSE
Genmab A/S	24/05/2024	15:05:59	1,911.5000	82	XCSE
Genmab A/S	24/05/2024	15:06:41	1,912.0000	23	XCSE
Genmab A/S	24/05/2024	15:07:05	1,912.0000	88	XCSE
Genmab A/S	24/05/2024	15:07:05	1,912.0000	23	CEUX
Genmab A/S	24/05/2024	15:07:05	1,912.0000	55	CEUX
Genmab A/S	24/05/2024	15:07:05	1,912.0000	7	AQEU
Genmab A/S	24/05/2024	15:07:05	1,912.0000	13	TQEX
Genmab A/S	24/05/2024	15:07:05	1,912.0000	4	XCSE
Genmab A/S	24/05/2024	15:09:08	1,912.0000	77	CEUX
Genmab A/S	24/05/2024	15:09:09	1,911.5000	45	XCSE
Genmab A/S	24/05/2024	15:10:57	1,911.5000	1	XCSE
Genmab A/S	24/05/2024	15:11:08	1,911.5000	26	XCSE
Genmab A/S	24/05/2024	15:11:08	1,911.5000	26	XCSE
Genmab A/S	24/05/2024	15:11:08	1,911.5000	26	XCSE
Genmab A/S	24/05/2024	15:11:08	1,911.5000	14	XCSE
Genmab A/S	24/05/2024	15:11:11	1,911.0000	89	XCSE
Genmab A/S	24/05/2024	15:11:11	1,911.0000	47	XCSE
Genmab A/S	24/05/2024	15:11:11	1,911.0000	27	XCSE
Genmab A/S	24/05/2024	15:11:11	1,911.0000	20	XCSE
Genmab A/S	24/05/2024	15:11:11	1,911.0000	12	XCSE

57

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:11:11	1,910.5000	89	XCSE
Genmab A/S	24/05/2024	15:11:11	1,910.5000	46	XCSE
Genmab A/S	24/05/2024	15:11:11	1,910.5000	21	XCSE
Genmab A/S	24/05/2024	15:15:08	1,912.0000	10	CEUX
Genmab A/S	24/05/2024	15:15:36	1,913.0000	69	AQEU
Genmab A/S	24/05/2024	15:17:51	1,913.5000	25	XCSE
Genmab A/S	24/05/2024	15:17:53	1,913.5000	59	XCSE
Genmab A/S	24/05/2024	15:17:53	1,913.5000	86	XCSE
Genmab A/S	24/05/2024	15:17:53	1,913.5000	57	XCSE
Genmab A/S	24/05/2024	15:17:53	1,913.5000	51	CEUX
Genmab A/S	24/05/2024	15:17:53	1,913.5000	16	XCSE
Genmab A/S	24/05/2024	15:19:20	1,913.0000	6	CEUX
Genmab A/S	24/05/2024	15:19:42	1,913.0000	13	CEUX
Genmab A/S	24/05/2024	15:21:20	1,913.5000	22	CEUX
Genmab A/S	24/05/2024	15:21:20	1,913.5000	4	AQEU
Genmab A/S	24/05/2024	15:21:20	1,913.5000	19	CEUX
Genmab A/S	24/05/2024	15:21:20	1,913.5000	5	TQEX
Genmab A/S	24/05/2024	15:21:20	1,913.5000	19	XCSE
Genmab A/S	24/05/2024	15:21:20	1,913.5000	47	XCSE
Genmab A/S	24/05/2024	15:21:20	1,913.5000	36	CEUX
Genmab A/S	24/05/2024	15:21:20	1,913.5000	43	CEUX
Genmab A/S	24/05/2024	15:21:23	1,913.0000	52	XCSE
Genmab A/S	24/05/2024	15:21:23	1,913.0000	53	XCSE
Genmab A/S	24/05/2024	15:22:22	1,913.0000	74	XCSE
Genmab A/S	24/05/2024	15:25:37	1,913.0000	35	CEUX
Genmab A/S	24/05/2024	15:25:46	1,913.0000	11	AQEU
Genmab A/S	24/05/2024	15:25:57	1,913.5000	39	XCSE
Genmab A/S	24/05/2024	15:26:01	1,913.0000	1	AQEU
Genmab A/S	24/05/2024	15:26:22	1,913.5000	1	CEUX
Genmab A/S	24/05/2024	15:27:10	1,914.5000	28	XCSE
Genmab A/S	24/05/2024	15:27:10	1,914.5000	7	XCSE
Genmab A/S	24/05/2024	15:27:33	1,914.5000	3	XCSE
Genmab A/S	24/05/2024	15:27:44	1,914.5000	16	XCSE
Genmab A/S	24/05/2024	15:27:59	1,914.5000	35	XCSE
Genmab A/S	24/05/2024	15:27:59	1,914.5000	5	XCSE
Genmab A/S	24/05/2024	15:28:12	1,916.0000	1	CEUX
Genmab A/S	24/05/2024	15:28:12	1,916.0000	12	CEUX
Genmab A/S	24/05/2024	15:28:12	1,916.0000	91	CEUX
Genmab A/S	24/05/2024	15:28:12	1,916.0000	13	CEUX
Genmab A/S	24/05/2024	15:28:39	1,917.0000	15	XCSE

58

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:28:39	1,917.0000	25	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	36	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	2	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	2	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	3	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:01	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:01	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	3	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	6	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	2	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	17	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	1	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	5	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	3	XCSE
Genmab A/S	24/05/2024	15:29:01	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:01	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	8	CEUX

59

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:29:01	1,916.5000	14	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	6	CEUX
Genmab A/S	24/05/2024	15:29:01	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:03	1,916.5000	4	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	9	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	13	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:03	1,916.5000	4	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:03	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:03	1,916.5000	62	XCSE
Genmab A/S	24/05/2024	15:29:03	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:03	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:03	1,916.5000	18	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	7	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	1	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:03	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:03	1,916.5000	3	XCSE
Genmab A/S	24/05/2024	15:29:04	1,916.5000	4	TQEX
Genmab A/S	24/05/2024	15:29:04	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:05	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:05	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:05	1,916.5000	1	TQEX
Genmab A/S	24/05/2024	15:29:05	1,916.5000	6	XCSE
Genmab A/S	24/05/2024	15:29:05	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:09	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:09	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:09	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:09	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:09	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:29:09	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:09	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:09	1,916.5000	5	TQEX

60

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:29:09	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:09	1,916.5000	10	CEUX
Genmab A/S	24/05/2024	15:29:09	1,916.5000	1	AQEU
Genmab A/S	24/05/2024	15:29:09	1,916.5000	3	TQEX
Genmab A/S	24/05/2024	15:29:10	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:10	1,916.5000	9	XCSE
Genmab A/S	24/05/2024	15:29:10	1,916.5000	2	XCSE
Genmab A/S	24/05/2024	15:29:10	1,916.5000	7	CEUX
Genmab A/S	24/05/2024	15:29:10	1,916.5000	18	CEUX
Genmab A/S	24/05/2024	15:29:10	1,916.5000	16	CEUX
Genmab A/S	24/05/2024	15:30:03	1,913.0000	23	XCSE
Genmab A/S	24/05/2024	15:30:03	1,913.0000	21	CEUX
Genmab A/S	24/05/2024	15:30:03	1,913.0000	21	CEUX
Genmab A/S	24/05/2024	15:30:03	1,913.0000	3	AQEU
Genmab A/S	24/05/2024	15:30:03	1,913.0000	5	TQEX
Genmab A/S	24/05/2024	15:30:03	1,913.0000	1	CEUX
Genmab A/S	24/05/2024	15:30:03	1,913.0000	52	XCSE
Genmab A/S	24/05/2024	15:30:03	1,913.0000	48	XCSE
Genmab A/S	24/05/2024	15:31:04	1,910.5000	41	XCSE
Genmab A/S	24/05/2024	15:31:04	1,910.5000	41	XCSE
Genmab A/S	24/05/2024	15:31:06	1,910.5000	41	XCSE
Genmab A/S	24/05/2024	15:34:03	1,912.0000	8	XCSE
Genmab A/S	24/05/2024	15:34:03	1,912.0000	8	XCSE
Genmab A/S	24/05/2024	15:34:03	1,912.0000	34	XCSE
Genmab A/S	24/05/2024	15:34:03	1,912.0000	9	CEUX
Genmab A/S	24/05/2024	15:34:03	1,912.0000	1	AQEU
Genmab A/S	24/05/2024	15:34:03	1,912.0000	5	TQEX
Genmab A/S	24/05/2024	15:34:03	1,912.0000	9	CEUX
Genmab A/S	24/05/2024	15:34:03	1,912.0000	4	CEUX
Genmab A/S	24/05/2024	15:34:03	1,912.0000	3	XCSE
Genmab A/S	24/05/2024	15:34:04	1,912.0000	23	XCSE
Genmab A/S	24/05/2024	15:34:04	1,912.0000	23	XCSE
Genmab A/S	24/05/2024	15:34:04	1,912.0000	23	XCSE
Genmab A/S	24/05/2024	15:34:04	1,912.0000	23	XCSE
Genmab A/S	24/05/2024	15:34:04	1,912.0000	14	XCSE
Genmab A/S	24/05/2024	15:34:05	1,911.0000	19	XCSE
Genmab A/S	24/05/2024	15:34:05	1,911.0000	11	XCSE
Genmab A/S	24/05/2024	15:35:59	1,912.0000	8	XCSE
Genmab A/S	24/05/2024	15:35:59	1,912.0000	7	CEUX
Genmab A/S	24/05/2024	15:36:00	1,912.0000	2	CEUX

61

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:36:00	1,912.0000	1	AQEU
Genmab A/S	24/05/2024	15:36:00	1,912.0000	5	TQEX
Genmab A/S	24/05/2024	15:36:00	1,912.0000	7	XCSE
Genmab A/S	24/05/2024	15:36:07	1,911.5000	8	XCSE
Genmab A/S	24/05/2024	15:36:07	1,911.5000	8	CEUX
Genmab A/S	24/05/2024	15:36:07	1,911.5000	8	XCSE
Genmab A/S	24/05/2024	15:36:07	1,911.5000	8	XCSE
Genmab A/S	24/05/2024	15:36:10	1,911.5000	8	XCSE
Genmab A/S	24/05/2024	15:36:10	1,911.5000	8	XCSE
Genmab A/S	24/05/2024	15:36:10	1,911.5000	38	XCSE
Genmab A/S	24/05/2024	15:36:10	1,911.5000	8	CEUX
Genmab A/S	24/05/2024	15:36:10	1,911.5000	8	CEUX
Genmab A/S	24/05/2024	15:36:10	1,911.5000	3	CEUX
Genmab A/S	24/05/2024	15:36:10	1,911.5000	8	XCSE
Genmab A/S	24/05/2024	15:36:19	1,911.5000	23	XCSE
Genmab A/S	24/05/2024	15:36:20	1,911.5000	23	XCSE
Genmab A/S	24/05/2024	15:36:36	1,912.5000	62	XCSE
Genmab A/S	24/05/2024	15:36:36	1,912.5000	12	CEUX
Genmab A/S	24/05/2024	15:36:36	1,912.5000	44	CEUX
Genmab A/S	24/05/2024	15:36:36	1,912.5000	14	CEUX
Genmab A/S	24/05/2024	15:36:36	1,912.5000	3	CEUX
Genmab A/S	24/05/2024	15:36:46	1,912.0000	4	CEUX
Genmab A/S	24/05/2024	15:36:46	1,912.0000	11	CEUX
Genmab A/S	24/05/2024	15:36:46	1,912.0000	46	XCSE
Genmab A/S	24/05/2024	15:36:46	1,912.0000	26	CEUX
Genmab A/S	24/05/2024	15:36:46	1,912.0000	6	AQEU
Genmab A/S	24/05/2024	15:36:46	1,912.0000	7	TQEX
Genmab A/S	24/05/2024	15:37:58	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:01	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:01	1,916.5000	40	XCSE
Genmab A/S	24/05/2024	15:38:01	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:01	1,916.5000	40	XCSE
Genmab A/S	24/05/2024	15:38:02	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:02	1,916.5000	12	XCSE
Genmab A/S	24/05/2024	15:38:02	1,916.5000	28	XCSE
Genmab A/S	24/05/2024	15:38:02	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:02	1,916.5000	7	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	3	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	8	CEUX

62

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:38:04	1,916.5000	3	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	6	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	5	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	5	TQEX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	4	TQEX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	11	CEUX
Genmab A/S	24/05/2024	15:38:04	1,916.5000	10	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	5	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	27	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	27	XCSE
Genmab A/S	24/05/2024	15:38:04	1,916.5000	7	XCSE
Genmab A/S	24/05/2024	15:38:38	1,915.0000	16	XCSE
Genmab A/S	24/05/2024	15:38:38	1,915.0000	8	XCSE
Genmab A/S	24/05/2024	15:38:38	1,915.0000	79	XCSE
Genmab A/S	24/05/2024	15:39:41	1,915.0000	49	XCSE
Genmab A/S	24/05/2024	15:39:57	1,915.0000	60	XCSE
Genmab A/S	24/05/2024	15:39:57	1,915.0000	50	CEUX
Genmab A/S	24/05/2024	15:39:57	1,915.0000	4	CEUX
Genmab A/S	24/05/2024	15:39:57	1,915.0000	10	CEUX
Genmab A/S	24/05/2024	15:40:08	1,915.0000	28	XCSE
Genmab A/S	24/05/2024	15:40:08	1,915.0000	28	XCSE
Genmab A/S	24/05/2024	15:40:08	1,915.0000	28	XCSE
Genmab A/S	24/05/2024	15:40:09	1,915.0000	6	XCSE
Genmab A/S	24/05/2024	15:40:09	1,915.0000	22	XCSE
Genmab A/S	24/05/2024	15:40:09	1,915.0000	28	XCSE

63

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:41:05	1,916.0000	7	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	6	CEUX
Genmab A/S	24/05/2024	15:42:06	1,919.5000	23	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	23	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	10	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	1	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	22	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	23	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	10	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	1	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	23	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	19	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	4	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	10	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	41	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	3	CEUX
Genmab A/S	24/05/2024	15:42:06	1,919.5000	3	CEUX
Genmab A/S	24/05/2024	15:42:06	1,919.5000	2	AQEU
Genmab A/S	24/05/2024	15:42:06	1,919.5000	1	CEUX
Genmab A/S	24/05/2024	15:42:06	1,919.5000	5	CEUX
Genmab A/S	24/05/2024	15:42:06	1,919.5000	9	CEUX
Genmab A/S	24/05/2024	15:42:06	1,919.5000	10	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	23	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	8	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	2	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	21	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	17	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	21	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	21	XCSE
Genmab A/S	24/05/2024	15:42:06	1,919.5000	22	CEUX
Genmab A/S	24/05/2024	15:42:53	1,921.0000	15	XCSE
Genmab A/S	24/05/2024	15:42:53	1,921.0000	32	XCSE
Genmab A/S	24/05/2024	15:42:53	1,921.0000	43	CEUX
Genmab A/S	24/05/2024	15:42:53	1,921.0000	7	TQEX
Genmab A/S	24/05/2024	15:42:53	1,921.0000	4	CEUX
Genmab A/S	24/05/2024	15:43:18	1,920.0000	21	XCSE
Genmab A/S	24/05/2024	15:43:34	1,921.0000	23	XCSE
Genmab A/S	24/05/2024	15:43:44	1,921.0000	24	CEUX
Genmab A/S	24/05/2024	15:43:44	1,921.0000	63	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	11	XCSE

64

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:45:24	1,922.0000	25	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	11	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	25	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	4	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	12	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	34	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	29	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	12	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	5	TQEX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	7	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	5	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	5	TQEX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	11	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	25	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	7	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	4	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	16	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	9	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	11	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	2	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	10	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	12	CEUX
Genmab A/S	24/05/2024	15:45:24	1,922.0000	15	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	29	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	29	XCSE
Genmab A/S	24/05/2024	15:45:24	1,922.0000	24	XCSE
Genmab A/S	24/05/2024	15:47:21	1,924.0000	50	XCSE
Genmab A/S	24/05/2024	15:47:21	1,924.0000	7	XCSE
Genmab A/S	24/05/2024	15:47:21	1,924.0000	9	XCSE
Genmab A/S	24/05/2024	15:47:21	1,924.0000	51	CEUX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	9	CEUX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	9	CEUX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	9	CEUX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	9	CEUX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	8	CEUX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	8	AQEU
Genmab A/S	24/05/2024	15:47:21	1,924.0000	1	AQEU
Genmab A/S	24/05/2024	15:47:21	1,924.0000	1	AQEU
Genmab A/S	24/05/2024	15:47:21	1,924.0000	2	AQEU
Genmab A/S	24/05/2024	15:47:21	1,924.0000	8	TQEX

65

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:47:21	1,924.0000	5	TQEX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	8	TQEX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	5	TQEX
Genmab A/S	24/05/2024	15:47:21	1,924.0000	9	XCSE
Genmab A/S	24/05/2024	15:47:21	1,924.0000	7	XCSE
Genmab A/S	24/05/2024	15:47:23	1,924.0000	4	CEUX
Genmab A/S	24/05/2024	15:47:26	1,924.0000	11	CEUX
Genmab A/S	24/05/2024	15:47:40	1,923.5000	25	CEUX
Genmab A/S	24/05/2024	15:47:50	1,924.5000	30	CEUX
Genmab A/S	24/05/2024	15:47:50	1,924.5000	16	CEUX
Genmab A/S	24/05/2024	15:48:02	1,924.0000	7	CEUX
Genmab A/S	24/05/2024	15:48:02	1,924.0000	16	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	26	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	25	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	26	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	25	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	9	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	19	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	11	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	14	CEUX
Genmab A/S	24/05/2024	15:48:13	1,923.5000	13	CEUX
Genmab A/S	24/05/2024	15:49:34	1,922.0000	23	XCSE
Genmab A/S	24/05/2024	15:49:34	1,922.0000	23	XCSE
Genmab A/S	24/05/2024	15:49:34	1,922.0000	17	XCSE
Genmab A/S	24/05/2024	15:49:34	1,922.0000	6	XCSE
Genmab A/S	24/05/2024	15:49:34	1,922.0000	17	XCSE
Genmab A/S	24/05/2024	15:49:34	1,922.0000	23	XCSE
Genmab A/S	24/05/2024	15:49:37	1,922.0000	17	XCSE
Genmab A/S	24/05/2024	15:50:07	1,921.5000	3	XCSE
Genmab A/S	24/05/2024	15:50:07	1,921.5000	53	XCSE
Genmab A/S	24/05/2024	15:50:07	1,921.5000	26	CEUX
Genmab A/S	24/05/2024	15:50:07	1,921.5000	25	CEUX
Genmab A/S	24/05/2024	15:50:07	1,921.5000	1	CEUX
Genmab A/S	24/05/2024	15:50:07	1,921.5000	19	CEUX
Genmab A/S	24/05/2024	15:50:07	1,921.5000	6	CEUX
Genmab A/S	24/05/2024	15:51:18	1,921.0000	24	XCSE
Genmab A/S	24/05/2024	15:51:18	1,921.0000	87	XCSE
Genmab A/S	24/05/2024	15:51:18	1,921.0000	24	XCSE
Genmab A/S	24/05/2024	15:51:18	1,921.0000	24	XCSE
Genmab A/S	24/05/2024	15:51:18	1,921.0000	24	XCSE

66

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:51:18	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	15:51:18	1,920.0000	50	CEUX
Genmab A/S	24/05/2024	15:51:18	1,920.0000	24	CEUX
Genmab A/S	24/05/2024	15:51:18	1,919.5000	39	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.5000	8	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.5000	8	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.5000	39	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.5000	4	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.0000	22	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.0000	26	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.0000	2	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.0000	24	XCSE
Genmab A/S	24/05/2024	15:51:18	1,919.0000	23	XCSE
Genmab A/S	24/05/2024	15:53:26	1,915.0000	43	CEUX
Genmab A/S	24/05/2024	15:53:26	1,915.0000	22	XCSE
Genmab A/S	24/05/2024	15:53:26	1,915.0000	70	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	2	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	6	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	4	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	8	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	8	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	8	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	7	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	5	TQEX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	21	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	56	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	8	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	21	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	8	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	21	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	8	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	31	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	23	XCSE
Genmab A/S	24/05/2024	15:55:00	1,916.0000	3	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	6	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	12	CEUX
Genmab A/S	24/05/2024	15:55:00	1,916.0000	17	CEUX
Genmab A/S	24/05/2024	15:55:31	1,919.0000	25	XCSE
Genmab A/S	24/05/2024	15:55:31	1,919.0000	1	XCSE
Genmab A/S	24/05/2024	15:55:31	1,919.0000	8	XCSE

67

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	15:55:31	1,919.0000	18	XCSE
Genmab A/S	24/05/2024	15:55:31	1,919.0000	27	XCSE
Genmab A/S	24/05/2024	15:55:59	1,917.5000	30	CEUX
Genmab A/S	24/05/2024	15:56:02	1,917.5000	38	CEUX
Genmab A/S	24/05/2024	15:56:02	1,917.5000	47	CEUX
Genmab A/S	24/05/2024	15:57:03	1,917.5000	13	CEUX
Genmab A/S	24/05/2024	15:57:03	1,917.5000	33	CEUX
Genmab A/S	24/05/2024	15:57:03	1,917.5000	8	AQEU
Genmab A/S	24/05/2024	15:57:04	1,917.5000	22	CEUX
Genmab A/S	24/05/2024	15:57:04	1,917.0000	10	CEUX
Genmab A/S	24/05/2024	15:57:04	1,917.0000	6	CEUX
Genmab A/S	24/05/2024	15:57:04	1,917.0000	41	CEUX
Genmab A/S	24/05/2024	15:57:04	1,917.0000	9	CEUX
Genmab A/S	24/05/2024	15:57:04	1,917.0000	19	CEUX
Genmab A/S	24/05/2024	15:57:51	1,917.5000	76	XCSE
Genmab A/S	24/05/2024	15:57:51	1,917.5000	30	CEUX
Genmab A/S	24/05/2024	15:58:14	1,917.0000	50	XCSE
Genmab A/S	24/05/2024	15:59:27	1,920.0000	12	XCSE
Genmab A/S	24/05/2024	15:59:27	1,920.0000	80	XCSE
Genmab A/S	24/05/2024	15:59:27	1,920.0000	12	CEUX
Genmab A/S	24/05/2024	15:59:27	1,920.0000	72	CEUX
Genmab A/S	24/05/2024	16:00:02	1,921.0000	38	CEUX
Genmab A/S	24/05/2024	16:00:02	1,921.0000	6	AQEU
Genmab A/S	24/05/2024	16:00:02	1,921.0000	6	TQEX
Genmab A/S	24/05/2024	16:00:02	1,921.0000	50	XCSE
Genmab A/S	24/05/2024	16:00:02	1,921.0000	31	XCSE
Genmab A/S	24/05/2024	16:00:02	1,921.0000	35	XCSE
Genmab A/S	24/05/2024	16:00:02	1,921.0000	8	XCSE
Genmab A/S	24/05/2024	16:00:02	1,919.5000	81	CEUX
Genmab A/S	24/05/2024	16:00:30	1,918.5000	69	XCSE
Genmab A/S	24/05/2024	16:00:30	1,917.0000	65	XCSE
Genmab A/S	24/05/2024	16:02:02	1,921.0000	17	XCSE
Genmab A/S	24/05/2024	16:02:03	1,921.0000	17	XCSE
Genmab A/S	24/05/2024	16:02:04	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:02:04	1,921.0000	10	XCSE
Genmab A/S	24/05/2024	16:02:07	1,921.0000	8	XCSE
Genmab A/S	24/05/2024	16:02:28	1,922.0000	73	XCSE
Genmab A/S	24/05/2024	16:02:31	1,921.5000	22	XCSE
Genmab A/S	24/05/2024	16:02:31	1,921.5000	22	XCSE
Genmab A/S	24/05/2024	16:02:31	1,921.5000	20	TQEX

68

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:02:31	1,921.5000	6	TQEX
Genmab A/S	24/05/2024	16:02:31	1,921.5000	22	XCSE
Genmab A/S	24/05/2024	16:02:31	1,921.5000	11	XCSE
Genmab A/S	24/05/2024	16:03:03	1,922.5000	20	AQEU
Genmab A/S	24/05/2024	16:03:03	1,922.5000	21	AQEU
Genmab A/S	24/05/2024	16:03:24	1,924.5000	25	XCSE
Genmab A/S	24/05/2024	16:03:34	1,924.5000	22	CEUX
Genmab A/S	24/05/2024	16:03:34	1,924.5000	22	CEUX
Genmab A/S	24/05/2024	16:03:34	1,924.5000	22	CEUX
Genmab A/S	24/05/2024	16:03:34	1,924.5000	4	CEUX
Genmab A/S	24/05/2024	16:03:34	1,924.5000	51	XCSE
Genmab A/S	24/05/2024	16:04:17	1,923.0000	26	XCSE
Genmab A/S	24/05/2024	16:04:17	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:04:17	1,923.0000	52	XCSE
Genmab A/S	24/05/2024	16:04:18	1,923.0000	13	XCSE
Genmab A/S	24/05/2024	16:04:18	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:04:18	1,923.0000	17	XCSE
Genmab A/S	24/05/2024	16:05:21	1,922.5000	56	XCSE
Genmab A/S	24/05/2024	16:05:21	1,922.5000	62	XCSE
Genmab A/S	24/05/2024	16:05:21	1,922.5000	18	XCSE
Genmab A/S	24/05/2024	16:06:39	1,924.5000	89	XCSE
Genmab A/S	24/05/2024	16:06:39	1,924.5000	21	XCSE
Genmab A/S	24/05/2024	16:06:39	1,924.5000	21	XCSE
Genmab A/S	24/05/2024	16:06:39	1,924.5000	21	XCSE
Genmab A/S	24/05/2024	16:06:39	1,924.5000	6	XCSE
Genmab A/S	24/05/2024	16:06:56	1,924.5000	8	AQEU
Genmab A/S	24/05/2024	16:06:56	1,924.5000	8	TQEX
Genmab A/S	24/05/2024	16:06:59	1,924.5000	26	XCSE
Genmab A/S	24/05/2024	16:06:59	1,924.5000	68	XCSE
Genmab A/S	24/05/2024	16:07:20	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:07:20	1,923.0000	2	XCSE
Genmab A/S	24/05/2024	16:07:20	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:07:20	1,923.0000	21	XCSE
Genmab A/S	24/05/2024	16:08:30	1,923.0000	23	TQEX
Genmab A/S	24/05/2024	16:08:30	1,923.0000	8	TQEX
Genmab A/S	24/05/2024	16:08:30	1,923.0000	23	TQEX
Genmab A/S	24/05/2024	16:08:30	1,923.0000	15	TQEX
Genmab A/S	24/05/2024	16:09:30	1,922.5000	50	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	21	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	27	XCSE

69

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:09:30	1,922.5000	2	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	20	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	27	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	22	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	12	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	20	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	22	XCSE
Genmab A/S	24/05/2024	16:09:30	1,922.5000	7	XCSE
Genmab A/S	24/05/2024	16:09:44	1,922.5000	26	AQEU
Genmab A/S	24/05/2024	16:10:06	1,922.5000	28	TQEX
Genmab A/S	24/05/2024	16:10:06	1,922.5000	6	TQEX
Genmab A/S	24/05/2024	16:10:32	1,922.5000	6	TQEX
Genmab A/S	24/05/2024	16:10:32	1,922.5000	89	XCSE
Genmab A/S	24/05/2024	16:10:32	1,922.5000	25	TQEX
Genmab A/S	24/05/2024	16:10:32	1,922.5000	6	TQEX
Genmab A/S	24/05/2024	16:10:32	1,922.5000	16	TQEX
Genmab A/S	24/05/2024	16:11:16	1,924.0000	59	XCSE
Genmab A/S	24/05/2024	16:11:16	1,924.0000	2	XCSE
Genmab A/S	24/05/2024	16:11:16	1,924.0000	23	XCSE
Genmab A/S	24/05/2024	16:11:16	1,924.0000	40	XCSE
Genmab A/S	24/05/2024	16:11:16	1,924.0000	14	XCSE
Genmab A/S	24/05/2024	16:11:47	1,923.5000	73	XCSE
Genmab A/S	24/05/2024	16:11:47	1,923.5000	19	TQEX
Genmab A/S	24/05/2024	16:11:47	1,923.5000	2	TQEX
Genmab A/S	24/05/2024	16:11:47	1,923.5000	10	TQEX
Genmab A/S	24/05/2024	16:11:47	1,923.5000	11	TQEX
Genmab A/S	24/05/2024	16:11:48	1,923.5000	10	TQEX
Genmab A/S	24/05/2024	16:11:48	1,923.5000	9	AQEU
Genmab A/S	24/05/2024	16:12:51	1,922.0000	67	XCSE
Genmab A/S	24/05/2024	16:12:51	1,922.0000	86	XCSE
Genmab A/S	24/05/2024	16:12:51	1,921.0000	63	XCSE
Genmab A/S	24/05/2024	16:12:51	1,921.0000	50	XCSE
Genmab A/S	24/05/2024	16:12:51	1,921.0000	29	XCSE
Genmab A/S	24/05/2024	16:12:51	1,920.5000	26	XCSE
Genmab A/S	24/05/2024	16:12:51	1,920.5000	39	XCSE
Genmab A/S	24/05/2024	16:12:51	1,920.0000	8	XCSE
Genmab A/S	24/05/2024	16:15:13	1,919.5000	1	XCSE
Genmab A/S	24/05/2024	16:15:13	1,919.5000	44	XCSE
Genmab A/S	24/05/2024	16:15:13	1,919.5000	32	XCSE
Genmab A/S	24/05/2024	16:15:13	1,919.5000	1	XCSE

70

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:15:13	1,919.5000	29	XCSE
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	4	AQEU
Genmab A/S	24/05/2024	16:15:13	1,919.5000	9	XCSE
Genmab A/S	24/05/2024	16:16:29	1,919.0000	62	XCSE
Genmab A/S	24/05/2024	16:16:29	1,919.0000	56	XCSE
Genmab A/S	24/05/2024	16:16:29	1,919.0000	72	XCSE
Genmab A/S	24/05/2024	16:16:29	1,919.0000	17	XCSE
Genmab A/S	24/05/2024	16:16:30	1,918.0000	18	XCSE
Genmab A/S	24/05/2024	16:16:30	1,918.0000	32	XCSE
Genmab A/S	24/05/2024	16:18:11	1,917.5000	89	XCSE
Genmab A/S	24/05/2024	16:18:11	1,917.5000	49	XCSE
Genmab A/S	24/05/2024	16:18:11	1,917.5000	12	TQEX
Genmab A/S	24/05/2024	16:18:11	1,917.5000	12	TQEX
Genmab A/S	24/05/2024	16:18:11	1,917.5000	56	AQEU
Genmab A/S	24/05/2024	16:18:11	1,917.5000	69	AQEU
Genmab A/S	24/05/2024	16:19:39	1,917.5000	12	AQEU
Genmab A/S	24/05/2024	16:19:39	1,917.5000	13	TQEX
Genmab A/S	24/05/2024	16:19:39	1,917.5000	45	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	21	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	28	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	21	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	21	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	15	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	3	XCSE
Genmab A/S	24/05/2024	16:19:39	1,917.5000	8	XCSE
Genmab A/S	24/05/2024	16:19:41	1,917.0000	32	AQEU
Genmab A/S	24/05/2024	16:20:19	1,917.0000	20	XCSE
Genmab A/S	24/05/2024	16:20:29	1,917.0000	75	XCSE
Genmab A/S	24/05/2024	16:20:29	1,917.0000	63	XCSE
Genmab A/S	24/05/2024	16:20:29	1,917.0000	18	XCSE
Genmab A/S	24/05/2024	16:20:30	1,917.0000	7	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	17	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	64	XCSE

71

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:21:37	1,919.0000	7	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	3	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	20	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	23	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	22	XCSE
Genmab A/S	24/05/2024	16:21:37	1,919.0000	9	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	49	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	26	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	20	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	29	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	26	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	26	XCSE
Genmab A/S	24/05/2024	16:22:23	1,918.0000	1	XCSE
Genmab A/S	24/05/2024	16:23:24	1,917.0000	76	XCSE
Genmab A/S	24/05/2024	16:23:24	1,917.0000	11	TQEX
Genmab A/S	24/05/2024	16:23:24	1,917.0000	10	XCSE
Genmab A/S	24/05/2024	16:23:34	1,916.5000	21	XCSE
Genmab A/S	24/05/2024	16:23:34	1,916.5000	21	XCSE
Genmab A/S	24/05/2024	16:23:34	1,916.5000	36	XCSE
Genmab A/S	24/05/2024	16:23:54	1,916.5000	26	TQEX
Genmab A/S	24/05/2024	16:23:54	1,916.5000	20	TQEX
Genmab A/S	24/05/2024	16:23:54	1,916.5000	2	TQEX
Genmab A/S	24/05/2024	16:24:44	1,918.0000	45	TQEX
Genmab A/S	24/05/2024	16:24:44	1,918.0000	21	XCSE
Genmab A/S	24/05/2024	16:24:44	1,918.0000	21	XCSE
Genmab A/S	24/05/2024	16:24:44	1,918.0000	21	XCSE
Genmab A/S	24/05/2024	16:24:44	1,918.0000	7	XCSE
Genmab A/S	24/05/2024	16:24:44	1,917.0000	25	XCSE
Genmab A/S	24/05/2024	16:24:44	1,917.0000	25	XCSE
Genmab A/S	24/05/2024	16:24:44	1,917.0000	20	XCSE
Genmab A/S	24/05/2024	16:24:44	1,917.0000	19	XCSE
Genmab A/S	24/05/2024	16:27:01	1,919.5000	13	XCSE
Genmab A/S	24/05/2024	16:27:01	1,919.5000	18	XCSE
Genmab A/S	24/05/2024	16:27:01	1,919.5000	13	XCSE
Genmab A/S	24/05/2024	16:27:01	1,919.5000	18	XCSE
Genmab A/S	24/05/2024	16:27:01	1,919.5000	6	XCSE
Genmab A/S	24/05/2024	16:27:21	1,920.5000	19	XCSE
Genmab A/S	24/05/2024	16:27:21	1,920.5000	17	XCSE
Genmab A/S	24/05/2024	16:27:21	1,920.5000	5	TQEX
Genmab A/S	24/05/2024	16:27:21	1,920.5000	5	TQEX

72

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:27:21	1,920.5000	2	TQEX
Genmab A/S	24/05/2024	16:27:21	1,920.5000	2	TQEX
Genmab A/S	24/05/2024	16:27:21	1,920.5000	19	XCSE
Genmab A/S	24/05/2024	16:27:21	1,920.5000	17	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	49	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	7	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	3	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	3	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	14	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	7	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	7	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	7	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	3	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	3	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	10	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	10	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	7	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	1	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	3	AQEU
Genmab A/S	24/05/2024	16:28:03	1,921.0000	4	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	3	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:28:03	1,921.0000	35	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	24	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	16	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	1	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	24	XCSE
Genmab A/S	24/05/2024	16:28:03	1,921.0000	20	XCSE
Genmab A/S	24/05/2024	16:29:02	1,921.0000	15	XCSE

73

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:29:02	1,921.0000	1	XCSE
Genmab A/S	24/05/2024	16:29:02	1,921.0000	8	XCSE
Genmab A/S	24/05/2024	16:29:02	1,921.0000	69	XCSE
Genmab A/S	24/05/2024	16:29:02	1,921.0000	24	XCSE
Genmab A/S	24/05/2024	16:29:02	1,921.0000	4	XCSE
Genmab A/S	24/05/2024	16:29:05	1,919.5000	5	AQEU
Genmab A/S	24/05/2024	16:29:05	1,919.5000	36	AQEU
Genmab A/S	24/05/2024	16:29:05	1,919.5000	6	TQEX
Genmab A/S	24/05/2024	16:29:05	1,919.5000	31	TQEX
Genmab A/S	24/05/2024	16:29:05	1,919.5000	6	TQEX
Genmab A/S	24/05/2024	16:29:05	1,919.5000	38	XCSE
Genmab A/S	24/05/2024	16:29:05	1,919.5000	7	XCSE
Genmab A/S	24/05/2024	16:29:05	1,919.0000	5	AQEU
Genmab A/S	24/05/2024	16:29:05	1,919.0000	36	AQEU
Genmab A/S	24/05/2024	16:29:05	1,919.0000	6	TQEX
Genmab A/S	24/05/2024	16:29:05	1,919.0000	37	TQEX
Genmab A/S	24/05/2024	16:29:05	1,919.0000	38	XCSE
Genmab A/S	24/05/2024	16:29:05	1,919.0000	4	XCSE
Genmab A/S	24/05/2024	16:29:05	1,918.0000	6	TQEX
Genmab A/S	24/05/2024	16:29:05	1,918.0000	37	TQEX
Genmab A/S	24/05/2024	16:29:05	1,918.0000	36	XCSE
Genmab A/S	24/05/2024	16:29:05	1,918.0000	38	XCSE
Genmab A/S	24/05/2024	16:29:05	1,917.5000	67	XCSE
Genmab A/S	24/05/2024	16:29:05	1,917.5000	69	XCSE
Genmab A/S	24/05/2024	16:31:25	1,917.5000	88	XCSE
Genmab A/S	24/05/2024	16:33:00	1,918.5000	24	XCSE
Genmab A/S	24/05/2024	16:33:00	1,918.5000	24	XCSE
Genmab A/S	24/05/2024	16:33:00	1,918.5000	24	XCSE
Genmab A/S	24/05/2024	16:33:00	1,918.5000	11	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	7	AQEU
Genmab A/S	24/05/2024	16:33:55	1,919.5000	25	AQEU
Genmab A/S	24/05/2024	16:33:55	1,919.5000	7	AQEU
Genmab A/S	24/05/2024	16:33:55	1,919.5000	2	AQEU
Genmab A/S	24/05/2024	16:33:55	1,919.5000	8	TQEX
Genmab A/S	24/05/2024	16:33:55	1,919.5000	8	TQEX
Genmab A/S	24/05/2024	16:33:55	1,919.5000	8	TQEX
Genmab A/S	24/05/2024	16:33:55	1,919.5000	13	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	40	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	10	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	16	XCSE

74

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:33:55	1,919.5000	34	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	26	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	13	XCSE
Genmab A/S	24/05/2024	16:33:55	1,919.5000	36	XCSE
Genmab A/S	24/05/2024	16:34:31	1,921.0000	5	XCSE
Genmab A/S	24/05/2024	16:34:31	1,921.0000	13	XCSE
Genmab A/S	24/05/2024	16:34:31	1,921.0000	18	XCSE
Genmab A/S	24/05/2024	16:34:31	1,921.0000	26	AQEU
Genmab A/S	24/05/2024	16:34:31	1,921.0000	3	AQEU
Genmab A/S	24/05/2024	16:34:31	1,921.0000	4	AQEU
Genmab A/S	24/05/2024	16:34:31	1,921.0000	21	AQEU
Genmab A/S	24/05/2024	16:34:31	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:34:31	1,921.0000	5	TQEX
Genmab A/S	24/05/2024	16:34:32	1,921.0000	18	XCSE
Genmab A/S	24/05/2024	16:34:50	1,921.5000	16	XCSE
Genmab A/S	24/05/2024	16:34:51	1,921.5000	16	XCSE
Genmab A/S	24/05/2024	16:36:17	1,922.0000	4	AQEU
Genmab A/S	24/05/2024	16:36:17	1,922.0000	1	XCSE
Genmab A/S	24/05/2024	16:36:17	1,922.0000	1	XCSE
Genmab A/S	24/05/2024	16:36:17	1,922.0000	50	XCSE
Genmab A/S	24/05/2024	16:36:17	1,922.0000	30	XCSE
Genmab A/S	24/05/2024	16:36:17	1,922.0000	28	TQEX
Genmab A/S	24/05/2024	16:36:17	1,922.0000	18	TQEX
Genmab A/S	24/05/2024	16:36:17	1,922.0000	170	XCSE
Genmab A/S	24/05/2024	16:36:17	1,922.0000	28	XCSE
Genmab A/S	24/05/2024	16:37:20	1,923.0000	34	XCSE
Genmab A/S	24/05/2024	16:37:20	1,923.0000	25	XCSE
Genmab A/S	24/05/2024	16:38:21	1,923.0000	5	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	2	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	3	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	5	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	5	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	16	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	16	TQEX
Genmab A/S	24/05/2024	16:38:21	1,923.0000	25	XCSE
Genmab A/S	24/05/2024	16:38:21	1,923.0000	19	XCSE
Genmab A/S	24/05/2024	16:38:21	1,923.0000	20	XCSE
Genmab A/S	24/05/2024	16:38:21	1,923.0000	18	XCSE
Genmab A/S	24/05/2024	16:38:21	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:38:21	1,923.0000	20	XCSE

75

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:38:21	1,923.0000	25	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	39	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	19	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	1	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	23	XCSE
Genmab A/S	24/05/2024	16:38:28	1,923.0000	10	XCSE
Genmab A/S	24/05/2024	16:39:50	1,924.5000	5	TQEX
Genmab A/S	24/05/2024	16:39:50	1,924.5000	5	TQEX
Genmab A/S	24/05/2024	16:39:50	1,924.5000	17	XCSE
Genmab A/S	24/05/2024	16:39:50	1,924.5000	19	XCSE
Genmab A/S	24/05/2024	16:39:50	1,924.5000	17	XCSE
Genmab A/S	24/05/2024	16:39:50	1,924.5000	2	XCSE
Genmab A/S	24/05/2024	16:40:00	1,924.5000	17	XCSE
Genmab A/S	24/05/2024	16:40:00	1,924.5000	10	XCSE
Genmab A/S	24/05/2024	16:40:00	1,924.5000	7	XCSE
Genmab A/S	24/05/2024	16:40:00	1,924.5000	10	XCSE
Genmab A/S	24/05/2024	16:40:02	1,924.5000	5	TQEX
Genmab A/S	24/05/2024	16:40:02	1,924.5000	24	TQEX
Genmab A/S	24/05/2024	16:41:38	1,925.0000	18	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	9	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	26	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	24	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	21	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	128	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	87	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	5	TQEX
Genmab A/S	24/05/2024	16:41:38	1,925.0000	5	TQEX
Genmab A/S	24/05/2024	16:41:38	1,925.0000	27	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	26	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	24	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	17	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	1	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	3	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	12	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	14	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	24	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	1	XCSE

76

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:41:38	1,925.0000	13	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	24	XCSE
Genmab A/S	24/05/2024	16:41:38	1,925.0000	30	XCSE
Genmab A/S	24/05/2024	16:41:38	1,924.5000	26	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	18	TQEX
Genmab A/S	24/05/2024	16:42:19	1,926.0000	6	TQEX
Genmab A/S	24/05/2024	16:42:19	1,926.0000	6	TQEX
Genmab A/S	24/05/2024	16:42:19	1,926.0000	18	TQEX
Genmab A/S	24/05/2024	16:42:19	1,926.0000	23	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	101	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	25	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	6	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	1	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	7	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	31	XCSE
Genmab A/S	24/05/2024	16:42:19	1,926.0000	38	XCSE
Genmab A/S	24/05/2024	16:43:13	1,926.0000	45	XCSE
Genmab A/S	24/05/2024	16:43:13	1,926.0000	251	XCSE
Genmab A/S	24/05/2024	16:44:11	1,924.5000	77	XCSE
Genmab A/S	24/05/2024	16:44:11	1,924.5000	10	AQEU
Genmab A/S	24/05/2024	16:44:11	1,924.5000	11	TQEX
Genmab A/S	24/05/2024	16:44:29	1,924.0000	73	XCSE
Genmab A/S	24/05/2024	16:44:51	1,922.5000	24	XCSE
Genmab A/S	24/05/2024	16:44:51	1,922.5000	24	XCSE
Genmab A/S	24/05/2024	16:45:10	1,923.5000	113	XCSE
Genmab A/S	24/05/2024	16:45:34	1,923.0000	83	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	26	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	19	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	42	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	61	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	19	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	42	XCSE
Genmab A/S	24/05/2024	16:45:34	1,921.5000	14	XCSE
Genmab A/S	24/05/2024	16:46:32	1,923.0000	122	XCSE
Genmab A/S	24/05/2024	16:47:06	1,923.5000	13	XCSE
Genmab A/S	24/05/2024	16:47:06	1,923.5000	120	XCSE
Genmab A/S	24/05/2024	16:47:06	1,923.5000	58	XCSE
Genmab A/S	24/05/2024	16:47:26	1,923.0000	41	XCSE
Genmab A/S	24/05/2024	16:47:42	1,923.0000	25	XCSE
Genmab A/S	24/05/2024	16:47:42	1,923.0000	26	XCSE

77

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:47:42	1,923.0000	13	XCSE
Genmab A/S	24/05/2024	16:47:42	1,923.0000	25	XCSE
Genmab A/S	24/05/2024	16:47:44	1,923.0000	26	XCSE
Genmab A/S	24/05/2024	16:47:44	1,923.0000	8	AQEU
Genmab A/S	24/05/2024	16:47:44	1,923.0000	6	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	23	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	64	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	73	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	10	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	66	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	23	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	1	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	1	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	60	XCSE
Genmab A/S	24/05/2024	16:48:48	1,924.0000	2	XCSE
Genmab A/S	24/05/2024	16:49:04	1,923.5000	89	XCSE
Genmab A/S	24/05/2024	16:49:33	1,922.0000	26	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	27	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	29	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	35	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	35	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	26	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	26	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	67	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	1	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	50	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	29	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	21	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	22	XCSE
Genmab A/S	24/05/2024	16:50:46	1,922.0000	12	AQEU
Genmab A/S	24/05/2024	16:50:46	1,922.0000	19	AQEU
Genmab A/S	24/05/2024	16:50:48	1,922.0000	25	AQEU
Genmab A/S	24/05/2024	16:51:19	1,921.5000	12	TQEX
Genmab A/S	24/05/2024	16:51:19	1,921.5000	26	XCSE
Genmab A/S	24/05/2024	16:51:19	1,921.5000	62	XCSE
Genmab A/S	24/05/2024	16:51:19	1,921.5000	25	XCSE
Genmab A/S	24/05/2024	16:51:19	1,921.5000	26	XCSE
Genmab A/S	24/05/2024	16:51:31	1,921.5000	26	XCSE
Genmab A/S	24/05/2024	16:51:45	1,921.0000	22	XCSE
Genmab A/S	24/05/2024	16:51:45	1,921.0000	22	XCSE

78

Exhibit 99.1(a)

APPENDIX Sharebuy-backprogramme-SpecificationforMay 20 – May 24,2024

Genmab A/S	24/05/2024	16:51:45	1,921.0000	13	XCSE
Genmab A/S	24/05/2024	16:51:45	1,921.0000	22	XCSE
Genmab A/S	24/05/2024	16:51:45	1,921.0000	22	XCSE
Genmab A/S	24/05/2024	16:52:24	1,921.5000	26	XCSE
Genmab A/S	24/05/2024	16:52:24	1,921.5000	44	XCSE
Genmab A/S	24/05/2024	16:52:24	1,921.5000	6	XCSE
Genmab A/S	24/05/2024	16:52:24	1,921.5000	15	XCSE
Genmab A/S	24/05/2024	16:52:24	1,921.5000	50	XCSE
Genmab A/S	24/05/2024	16:52:25	1,921.5000	21	XCSE
Genmab A/S	24/05/2024	16:52:25	1,921.5000	17	XCSE
Genmab A/S	24/05/2024	16:53:01	1,922.0000	35	TQEX
Genmab A/S	24/05/2024	16:53:01	1,922.0000	11	TQEX
Genmab A/S	24/05/2024	16:53:02	1,922.0000	15	TQEX
Genmab A/S	24/05/2024	16:53:02	1,922.0000	19	AQEU
Genmab A/S	24/05/2024	16:53:02	1,922.0000	27	TQEX
Genmab A/S	24/05/2024	16:53:02	1,922.0000	23	TQEX
Genmab A/S	24/05/2024	16:53:02	1,922.0000	29	TQEX
Genmab A/S	24/05/2024	16:53:51	1,922.0000	34	XCSE
Genmab A/S	24/05/2024	16:54:07	1,922.0000	1	CEUX

79