Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Issuer	Date	Time CEST	Price (DKK)	Quantity	Venue
Genmab A/S	29/04/2024	9:00:03 AM	1,959.00	45	XCSE
Genmab A/S	29/04/2024	9:00:03 AM	1,959.00	27	XCSE
Genmab A/S	29/04/2024	9:00:03 AM	1,959.00	12	XCSE
Genmab A/S	29/04/2024	9:00:05 AM	1,959.00	4	XCSE
Genmab A/S	29/04/2024	9:00:05 AM	1,959.00	3	XCSE
Genmab A/S	29/04/2024	9:00:05 AM	1,959.00	1	XCSE
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	4	XCSE
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	39	CEUX
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	11	CEUX
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	5	CEUX
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	35	XCSE
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	4	XCSE
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	23	CEUX
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	5	CEUX
Genmab A/S	29/04/2024	9:03:45 AM	1,960.50	39	CEUX
Genmab A/S	29/04/2024	9:03:47 AM	1,960.50	12	CEUX
Genmab A/S	29/04/2024	9:03:48 AM	1,960.50	27	CEUX
Genmab A/S	29/04/2024	9:03:48 AM	1,960.50	39	CEUX
Genmab A/S	29/04/2024	9:03:50 AM	1,959.50	22	XCSE
Genmab A/S	29/04/2024	9:03:50 AM	1,959.50	21	XCSE
Genmab A/S	29/04/2024	9:03:50 AM	1,959.50	21	XCSE
Genmab A/S	29/04/2024	9:03:50 AM	1,959.50	22	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	5	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	9	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	9	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	9	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	18	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	5	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	5	XCSE
Genmab A/S	29/04/2024	9:07:43 AM	1,962.00	18	XCSE
Genmab A/S	29/04/2024	9:07:46 AM	1,961.50	18	CEUX
Genmab A/S	29/04/2024	9:07:46 AM	1,961.50	10	CEUX
Genmab A/S	29/04/2024	9:07:46 AM	1,961.50	28	CEUX
Genmab A/S	29/04/2024	9:07:46 AM	1,961.50	28	CEUX
Genmab A/S	29/04/2024	9:07:46 AM	1,961.50	28	CEUX
Genmab A/S	29/04/2024	9:09:15 AM	1,972.00	42	XCSE
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	37	XCSE
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	61	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	37	XCSE
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	24	XCSE
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	35	CEUX
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	35	CEUX
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	28	CEUX
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	37	XCSE
Genmab A/S	29/04/2024	9:09:19 AM	1,972.50	38	XCSE
Genmab A/S	29/04/2024	9:09:30 AM	1,973.50	36	XCSE
Genmab A/S	29/04/2024	9:09:30 AM	1,973.50	36	XCSE
Genmab A/S	29/04/2024	9:09:30 AM	1,973.50	21	XCSE
Genmab A/S	29/04/2024	9:09:30 AM	1,973.50	33	CEUX
Genmab A/S	29/04/2024	9:09:30 AM	1,973.50	33	CEUX
Genmab A/S	29/04/2024	9:09:30 AM	1,973.50	19	CEUX
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	22	XCSE
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	22	XCSE
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	22	XCSE
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	13	XCSE
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	21	CEUX
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	21	CEUX
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	21	CEUX
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	4	CEUX
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	3	AQEU
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	3	AQEU
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	3	AQEU
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	3	AQEU
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	5	TQEX
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	3	AQEU
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	3	AQEU
Genmab A/S	29/04/2024	9:09:31 AM	1,972.00	51	CEUX
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	4	CEUX
Genmab A/S	29/04/2024	9:12:09 AM	1,975.00	2	AQEU
Genmab A/S	29/04/2024	9:12:11 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:16 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	10	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	2	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	20	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	2	AQEU
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	CEUX
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	2	AQEU
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	12	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	10	XCSE
Genmab A/S	29/04/2024	9:12:29 AM	1,975.00	26	XCSE
Genmab A/S	29/04/2024	9:12:30 AM	1,975.00	26	XCSE
Genmab A/S	29/04/2024	9:12:30 AM	1,975.00	8	AQEU
Genmab A/S	29/04/2024	9:12:30 AM	1,975.00	8	AQEU
Genmab A/S	29/04/2024	9:12:30 AM	1,975.00	26	AQEU
Genmab A/S	29/04/2024	9:12:30 AM	1,975.00	16	AQEU
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	10	XCSE
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	19	XCSE
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	10	XCSE
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	5	TQEX
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	10	CEUX
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	10	CEUX
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	1	AQEU
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	8	AQEU
Genmab A/S	29/04/2024	9:16:05 AM	1,967.00	5	TQEX
Genmab A/S	29/04/2024	9:17:06 AM	1,965.50	16	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:17:06 AM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	9:17:06 AM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	9:17:07 AM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	9:17:07 AM	1,965.50	16	CEUX
Genmab A/S	29/04/2024	9:17:07 AM	1,965.50	1	AQEU
Genmab A/S	29/04/2024	9:18:30 AM	1,967.50	59	CEUX
Genmab A/S	29/04/2024	9:19:45 AM	1,970.00	35	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	12	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	10	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	11	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	12	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	12	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	10	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	1	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	7	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	24	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	13	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	10	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	14	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	13	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	25	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	3	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	12	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	22	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	8	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	11	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	12	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	22	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	11	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	12	CEUX
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	24	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	9:22:04 AM	1,970.50	3	XCSE
Genmab A/S	29/04/2024	9:22:06 AM	1,970.50	1	XCSE
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	12	XCSE
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	12	XCSE
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	11	CEUX
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	8	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	12	XCSE
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	3	CEUX
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	12	XCSE
Genmab A/S	29/04/2024	9:22:10 AM	1,970.00	7	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	1	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	3	AQEU
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:22:46 AM	1,970.50	20	XCSE
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	28	CEUX
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	18	CEUX
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	4	AQEU
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	14	XCSE
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	1	XCSE
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	16	XCSE
Genmab A/S	29/04/2024	9:24:25 AM	1,970.00	19	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	7	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	4	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	28	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	32	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	11	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	21	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	7	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	11	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	7	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	14	XCSE
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	11	CEUX
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	26	CEUX
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	11	CEUX
Genmab A/S	29/04/2024	9:28:02 AM	1,975.00	4	CEUX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	11	CEUX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	11	CEUX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	5	TQEX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	11	CEUX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	8	CEUX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	2	CEUX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	5	TQEX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	4	TQEX
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	8	XCSE
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	26	XCSE
Genmab A/S	29/04/2024	9:28:25 AM	1,977.00	2	XCSE
Genmab A/S	29/04/2024	9:30:02 AM	1,975.00	35	XCSE
Genmab A/S	29/04/2024	9:31:22 AM	1,975.00	9	XCSE
Genmab A/S	29/04/2024	9:31:22 AM	1,975.00	16	XCSE
Genmab A/S	29/04/2024	9:31:22 AM	1,975.00	9	CEUX
Genmab A/S	29/04/2024	9:31:22 AM	1,975.00	9	XCSE
Genmab A/S	29/04/2024	9:31:22 AM	1,975.00	9	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	2	AQEU
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	16	CEUX
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	10	XCSE
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	5	XCSE
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	21	XCSE
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	15	XCSE
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	15	XCSE
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	16	CEUX
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	5	TQEX
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	16	CEUX
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	5	TQEX
Genmab A/S	29/04/2024	9:32:10 AM	1,975.00	14	XCSE
Genmab A/S	29/04/2024	9:32:47 AM	1,976.00	21	XCSE
Genmab A/S	29/04/2024	9:32:48 AM	1,976.00	21	XCSE
Genmab A/S	29/04/2024	9:32:48 AM	1,976.00	14	XCSE
Genmab A/S	29/04/2024	9:32:48 AM	1,976.00	20	CEUX
Genmab A/S	29/04/2024	9:32:48 AM	1,976.00	32	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	1	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	10	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	36	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	27	XCSE
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	22	CEUX
Genmab A/S	29/04/2024	9:39:07 AM	1,978.00	9	CEUX
Genmab A/S	29/04/2024	9:39:11 AM	1,976.50	15	XCSE
Genmab A/S	29/04/2024	9:39:23 AM	1,976.50	13	XCSE
Genmab A/S	29/04/2024	9:39:23 AM	1,976.50	44	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	15	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	15	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	15	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	15	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	10	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	25	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.50	6	CEUX
Genmab A/S	29/04/2024	9:41:32 AM	1,976.50	35	CEUX
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	25	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,977.00	6	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.50	40	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.50	5	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	46	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	46	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	18	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	5	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	5	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	18	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.00	23	XCSE
Genmab A/S	29/04/2024	9:41:32 AM	1,976.50	12	XCSE
Genmab A/S	29/04/2024	9:48:39 AM	1,980.00	70	XCSE
Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	11	XCSE
Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	11	XCSE
Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	11	XCSE
Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	11	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	10	CEUX
Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	10	CEUX
Genmab A/S	29/04/2024	9:48:45 AM	1,980.00	11	XCSE
Genmab A/S	29/04/2024	9:49:40 AM	1,981.00	22	CEUX
Genmab A/S	29/04/2024	9:49:40 AM	1,981.00	22	CEUX
Genmab A/S	29/04/2024	9:50:31 AM	1,982.50	37	XCSE
Genmab A/S	29/04/2024	9:51:00 AM	1,984.00	37	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	1	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	5	TQEX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	1	AQEU
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	5	TQEX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	32	TQEX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	6	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	6	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	4	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	2	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	4	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	2	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	10	XCSE
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	36	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	19	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	7	CEUX
Genmab A/S	29/04/2024	9:51:12 AM	1,983.50	13	CEUX
Genmab A/S	29/04/2024	9:53:01 AM	1,981.50	8	XCSE
Genmab A/S	29/04/2024	9:53:01 AM	1,981.50	31	XCSE
Genmab A/S	29/04/2024	9:53:01 AM	1,981.50	21	XCSE
Genmab A/S	29/04/2024	9:53:01 AM	1,981.50	39	XCSE
Genmab A/S	29/04/2024	9:54:59 AM	1,981.00	5	CEUX
Genmab A/S	29/04/2024	9:55:29 AM	1,981.00	4	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	9:55:45 AM	1,981.00	5	TQEX
Genmab A/S	29/04/2024	9:55:45 AM	1,981.00	8	XCSE
Genmab A/S	29/04/2024	9:55:46 AM	1,981.00	9	CEUX
Genmab A/S	29/04/2024	9:55:46 AM	1,981.00	1	AQEU
Genmab A/S	29/04/2024	9:55:46 AM	1,981.00	4	TQEX
Genmab A/S	29/04/2024	9:56:37 AM	1,980.50	51	CEUX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	5	TQEX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	1	AQEU
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	5	TQEX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	35	XCSE
Genmab A/S	29/04/2024	9:57:47 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	1	AQEU
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	5	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	10	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	5	TQEX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	2	CEUX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	26	TQEX
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	35	XCSE
Genmab A/S	29/04/2024	9:57:48 AM	1,981.00	15	XCSE
Genmab A/S	29/04/2024	10:00:00 AM	1,976.00	26	XCSE
Genmab A/S	29/04/2024	10:00:00 AM	1,976.00	26	XCSE
Genmab A/S	29/04/2024	10:00:00 AM	1,976.00	47	CEUX
Genmab A/S	29/04/2024	10:00:00 AM	1,976.00	7	AQEU
Genmab A/S	29/04/2024	10:00:00 AM	1,976.00	7	TQEX
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	24	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	20	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	20	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	5	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	40	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	19	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	26	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	18	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	7	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.50	9	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,974.00	43	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,974.00	43	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,974.00	33	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	26	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	18	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	2	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	5	XCSE
Genmab A/S	29/04/2024	10:00:05 AM	1,973.00	2	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	26	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	15	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	7	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	7	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	19	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	40	TQEX
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	22	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	26	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	30	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	22	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	26	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	4	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	5	XCSE
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	27	TQEX
Genmab A/S	29/04/2024	10:09:54 AM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	10:12:51 AM	1,974.00	3	CEUX
Genmab A/S	29/04/2024	10:12:51 AM	1,974.00	15	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	6	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	18	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	21	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	18	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	AQEU
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	AQEU
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	AQEU
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	22	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	50	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	25	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	13	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	AQEU
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	8	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	8	CEUX
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	AQEU
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	22	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	3	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	25	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	28	XCSE
Genmab A/S	29/04/2024	10:14:44 AM	1,974.50	16	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	1	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	TQEX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	1	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	XCSE
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	XCSE
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	XCSE
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	44	XCSE
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	31	XCSE
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	6	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	1	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	TQEX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	AQEU
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	3	CEUX
Genmab A/S	29/04/2024	10:18:25 AM	1,978.50	8	AQEU
Genmab A/S	29/04/2024	10:22:49 AM	1,977.00	23	XCSE
Genmab A/S	29/04/2024	10:22:49 AM	1,977.00	23	XCSE
Genmab A/S	29/04/2024	10:22:49 AM	1,977.00	36	CEUX
Genmab A/S	29/04/2024	10:24:33 AM	1,978.00	6	XCSE
Genmab A/S	29/04/2024	10:24:33 AM	1,978.00	35	XCSE
Genmab A/S	29/04/2024	10:24:33 AM	1,978.00	31	XCSE
Genmab A/S	29/04/2024	10:24:33 AM	1,978.00	48	XCSE
Genmab A/S	29/04/2024	10:24:33 AM	1,978.00	48	XCSE
Genmab A/S	29/04/2024	10:24:33 AM	1,978.00	15	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	1	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	12	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	2	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	11	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	8	CEUX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	5	TQEX
Genmab A/S	29/04/2024	10:26:23 AM	1,978.50	22	CEUX
Genmab A/S	29/04/2024	10:31:09 AM	1,978.50	35	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	3	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	9	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	3	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	11	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	1	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	3	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	9	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	2	AQEU
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	3	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	7	CEUX
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	2	AQEU
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	2	AQEU
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	12	XCSE
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	8	AQEU
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	8	AQEU
Genmab A/S	29/04/2024	10:31:16 AM	1,978.00	26	CEUX
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	23	CEUX
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	5	XCSE
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	1	XCSE
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	1	XCSE
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	22	XCSE
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	21	XCSE
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	7	TQEX
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	21	CEUX
Genmab A/S	29/04/2024	10:34:39 AM	1,978.00	7	AQEU
Genmab A/S	29/04/2024	10:34:39 AM	1,977.50	9	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	10:34:39 AM	1,977.50	38	XCSE
Genmab A/S	29/04/2024	10:34:39 AM	1,977.50	38	XCSE
Genmab A/S	29/04/2024	10:40:03 AM	1,980.50	15	XCSE
Genmab A/S	29/04/2024	10:40:03 AM	1,980.50	44	XCSE
Genmab A/S	29/04/2024	10:40:24 AM	1,981.50	37	CEUX
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	30	CEUX
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	4	CEUX
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	4	CEUX
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	14	XCSE
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	23	XCSE
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	63	XCSE
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	2	XCSE
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	30	CEUX
Genmab A/S	29/04/2024	10:40:49 AM	1,980.50	25	CEUX
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	17	XCSE
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	23	XCSE
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	13	XCSE
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	8	CEUX
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	33	CEUX
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	7	CEUX
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	7	AQEU
Genmab A/S	29/04/2024	10:46:42 AM	1,981.50	7	TQEX
Genmab A/S	29/04/2024	10:51:11 AM	1,981.00	2	CEUX
Genmab A/S	29/04/2024	10:51:39 AM	1,981.50	40	CEUX
Genmab A/S	29/04/2024	10:51:39 AM	1,981.50	8	CEUX
Genmab A/S	29/04/2024	10:51:39 AM	1,981.50	7	AQEU
Genmab A/S	29/04/2024	10:51:39 AM	1,981.50	7	TQEX
Genmab A/S	29/04/2024	10:51:39 AM	1,981.50	41	XCSE
Genmab A/S	29/04/2024	10:51:39 AM	1,981.50	11	XCSE
Genmab A/S	29/04/2024	10:55:56 AM	1,982.50	14	CEUX
Genmab A/S	29/04/2024	10:55:59 AM	1,982.50	1	CEUX
Genmab A/S	29/04/2024	10:55:59 AM	1,982.50	1	CEUX
Genmab A/S	29/04/2024	10:55:59 AM	1,982.50	55	CEUX
Genmab A/S	29/04/2024	10:55:59 AM	1,982.00	75	XCSE
Genmab A/S	29/04/2024	11:00:50 AM	1,981.00	9	CEUX
Genmab A/S	29/04/2024	11:03:55 AM	1,983.00	18	XCSE
Genmab A/S	29/04/2024	11:03:55 AM	1,983.00	6	XCSE
Genmab A/S	29/04/2024	11:04:34 AM	1,983.00	16	CEUX
Genmab A/S	29/04/2024	11:04:34 AM	1,983.00	4	CEUX
Genmab A/S	29/04/2024	11:04:52 AM	1,983.00	1	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	11:05:18 AM	1,983.00	13	CEUX
Genmab A/S	29/04/2024	11:05:28 AM	1,983.00	5	CEUX
Genmab A/S	29/04/2024	11:05:28 AM	1,983.00	33	CEUX
Genmab A/S	29/04/2024	11:06:05 AM	1,983.00	25	XCSE
Genmab A/S	29/04/2024	11:06:52 AM	1,983.00	25	XCSE
Genmab A/S	29/04/2024	11:06:52 AM	1,983.00	11	XCSE
Genmab A/S	29/04/2024	11:07:49 AM	1,983.00	38	XCSE
Genmab A/S	29/04/2024	11:08:33 AM	1,982.50	67	XCSE
Genmab A/S	29/04/2024	11:08:33 AM	1,982.50	60	CEUX
Genmab A/S	29/04/2024	11:08:33 AM	1,982.50	9	AQEU
Genmab A/S	29/04/2024	11:08:33 AM	1,982.50	9	TQEX
Genmab A/S	29/04/2024	11:14:40 AM	1,984.00	41	CEUX
Genmab A/S	29/04/2024	11:14:40 AM	1,984.00	29	CEUX
Genmab A/S	29/04/2024	11:14:46 AM	1,983.50	25	XCSE
Genmab A/S	29/04/2024	11:14:46 AM	1,983.50	28	XCSE
Genmab A/S	29/04/2024	11:14:46 AM	1,983.50	11	CEUX
Genmab A/S	29/04/2024	11:14:46 AM	1,983.50	38	CEUX
Genmab A/S	29/04/2024	11:14:46 AM	1,983.00	8	XCSE
Genmab A/S	29/04/2024	11:14:46 AM	1,983.00	14	XCSE
Genmab A/S	29/04/2024	11:16:53 AM	1,982.50	71	XCSE
Genmab A/S	29/04/2024	11:16:53 AM	1,982.50	12	CEUX
Genmab A/S	29/04/2024	11:16:53 AM	1,982.50	52	CEUX
Genmab A/S	29/04/2024	11:16:53 AM	1,982.50	9	AQEU
Genmab A/S	29/04/2024	11:16:53 AM	1,982.50	10	TQEX
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	41	CEUX
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	20	CEUX
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	4	CEUX
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	12	CEUX
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	24	XCSE
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	11	XCSE
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	13	XCSE
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	24	XCSE
Genmab A/S	29/04/2024	11:23:56 AM	1,983.50	44	XCSE
Genmab A/S	29/04/2024	11:29:27 AM	1,984.50	35	XCSE
Genmab A/S	29/04/2024	11:29:27 AM	1,984.50	6	XCSE
Genmab A/S	29/04/2024	11:30:35 AM	1,984.50	39	XCSE
Genmab A/S	29/04/2024	11:31:00 AM	1,984.00	55	CEUX
Genmab A/S	29/04/2024	11:31:00 AM	1,984.00	26	CEUX
Genmab A/S	29/04/2024	11:31:00 AM	1,983.50	80	XCSE
Genmab A/S	29/04/2024	11:31:00 AM	1,983.00	81	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	11:31:00 AM	1,983.00	79	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	10	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	16	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	11	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	16	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	5	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	5	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	6	XCSE
Genmab A/S	29/04/2024	11:40:08 AM	1,975.50	6	XCSE
Genmab A/S	29/04/2024	11:44:52 AM	1,979.00	6	CEUX
Genmab A/S	29/04/2024	11:44:52 AM	1,979.00	38	CEUX
Genmab A/S	29/04/2024	11:44:58 AM	1,978.50	26	CEUX
Genmab A/S	29/04/2024	11:44:58 AM	1,978.50	26	CEUX
Genmab A/S	29/04/2024	11:44:58 AM	1,978.50	26	CEUX
Genmab A/S	29/04/2024	11:44:58 AM	1,978.50	10	CEUX
Genmab A/S	29/04/2024	11:48:10 AM	1,978.50	36	CEUX
Genmab A/S	29/04/2024	11:48:41 AM	1,978.50	22	XCSE
Genmab A/S	29/04/2024	11:48:41 AM	1,978.50	22	XCSE
Genmab A/S	29/04/2024	11:48:41 AM	1,978.50	22	XCSE
Genmab A/S	29/04/2024	11:48:41 AM	1,978.50	15	XCSE
Genmab A/S	29/04/2024	11:51:05 AM	1,978.00	68	CEUX
Genmab A/S	29/04/2024	11:55:19 AM	1,977.50	12	XCSE
Genmab A/S	29/04/2024	11:55:20 AM	1,977.00	4	CEUX
Genmab A/S	29/04/2024	11:55:20 AM	1,977.00	9	CEUX
Genmab A/S	29/04/2024	11:55:25 AM	1,977.00	12	CEUX
Genmab A/S	29/04/2024	11:55:39 AM	1,977.00	75	XCSE
Genmab A/S	29/04/2024	11:55:39 AM	1,977.00	1	CEUX
Genmab A/S	29/04/2024	11:55:39 AM	1,977.00	24	CEUX
Genmab A/S	29/04/2024	11:55:39 AM	1,977.00	18	CEUX
Genmab A/S	29/04/2024	12:01:12 PM	1,977.50	40	XCSE
Genmab A/S	29/04/2024	12:01:12 PM	1,977.00	34	XCSE
Genmab A/S	29/04/2024	12:01:12 PM	1,977.00	34	XCSE
Genmab A/S	29/04/2024	12:03:10 PM	1,975.50	45	CEUX
Genmab A/S	29/04/2024	12:03:10 PM	1,975.50	7	AQEU
Genmab A/S	29/04/2024	12:03:10 PM	1,975.50	7	TQEX
Genmab A/S	29/04/2024	12:03:10 PM	1,975.50	51	XCSE
Genmab A/S	29/04/2024	12:08:33 PM	1,974.00	38	TQEX
Genmab A/S	29/04/2024	12:08:33 PM	1,974.00	1	TQEX
Genmab A/S	29/04/2024	12:08:50 PM	1,973.50	51	CEUX
Genmab A/S	29/04/2024	12:08:50 PM	1,973.50	7	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	12:08:50 PM	1,973.50	9	AQEU
Genmab A/S	29/04/2024	12:08:50 PM	1,973.50	9	TQEX
Genmab A/S	29/04/2024	12:08:50 PM	1,973.50	64	XCSE
Genmab A/S	29/04/2024	12:13:03 PM	1,974.50	2	CEUX
Genmab A/S	29/04/2024	12:13:03 PM	1,974.50	55	CEUX
Genmab A/S	29/04/2024	12:13:03 PM	1,973.50	11	CEUX
Genmab A/S	29/04/2024	12:14:45 PM	1,973.50	47	CEUX
Genmab A/S	29/04/2024	12:16:23 PM	1,973.50	25	CEUX
Genmab A/S	29/04/2024	12:16:23 PM	1,973.50	25	CEUX
Genmab A/S	29/04/2024	12:16:23 PM	1,973.50	8	CEUX
Genmab A/S	29/04/2024	12:18:20 PM	1,974.00	56	XCSE
Genmab A/S	29/04/2024	12:20:48 PM	1,974.00	12	CEUX
Genmab A/S	29/04/2024	12:20:48 PM	1,974.00	8	CEUX
Genmab A/S	29/04/2024	12:20:48 PM	1,974.00	41	CEUX
Genmab A/S	29/04/2024	12:23:40 PM	1,973.00	56	TQEX
Genmab A/S	29/04/2024	12:23:40 PM	1,973.00	55	XCSE
Genmab A/S	29/04/2024	12:24:51 PM	1,972.50	55	AQEU
Genmab A/S	29/04/2024	12:30:56 PM	1,974.00	34	XCSE
Genmab A/S	29/04/2024	12:30:56 PM	1,974.00	48	XCSE
Genmab A/S	29/04/2024	12:30:56 PM	1,974.00	48	XCSE
Genmab A/S	29/04/2024	12:30:56 PM	1,974.00	19	XCSE
Genmab A/S	29/04/2024	12:30:57 PM	1,973.00	15	XCSE
Genmab A/S	29/04/2024	12:30:57 PM	1,973.00	34	XCSE
Genmab A/S	29/04/2024	12:35:19 PM	1,971.00	60	XCSE
Genmab A/S	29/04/2024	12:35:19 PM	1,971.00	14	XCSE
Genmab A/S	29/04/2024	12:40:17 PM	1,971.00	26	XCSE
Genmab A/S	29/04/2024	12:40:17 PM	1,971.00	9	XCSE
Genmab A/S	29/04/2024	12:40:30 PM	1,970.50	25	CEUX
Genmab A/S	29/04/2024	12:40:30 PM	1,970.50	17	CEUX
Genmab A/S	29/04/2024	12:40:30 PM	1,970.50	40	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	5	TQEX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	5	TQEX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	3	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	XCSE
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	1	XCSE
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	3	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	5	TQEX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	XCSE
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	9	XCSE
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	36	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	12	CEUX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	8	TQEX
Genmab A/S	29/04/2024	12:44:14 PM	1,971.50	12	XCSE
Genmab A/S	29/04/2024	12:48:17 PM	1,970.00	60	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	45	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	11	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	1	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	19	XCSE
Genmab A/S	29/04/2024	12:52:27 PM	1,970.50	7	XCSE
Genmab A/S	29/04/2024	12:55:26 PM	1,970.00	20	CEUX
Genmab A/S	29/04/2024	12:55:26 PM	1,970.00	35	CEUX
Genmab A/S	29/04/2024	12:55:26 PM	1,970.00	2	CEUX
Genmab A/S	29/04/2024	12:55:26 PM	1,970.00	3	CEUX
Genmab A/S	29/04/2024	12:58:52 PM	1,970.50	2	CEUX
Genmab A/S	29/04/2024	12:58:52 PM	1,970.50	20	CEUX
Genmab A/S	29/04/2024	12:59:02 PM	1,970.50	2	CEUX
Genmab A/S	29/04/2024	12:59:02 PM	1,970.50	24	CEUX
Genmab A/S	29/04/2024	12:59:02 PM	1,970.50	15	CEUX
Genmab A/S	29/04/2024	12:59:02 PM	1,970.00	11	XCSE
Genmab A/S	29/04/2024	12:59:02 PM	1,970.00	2	XCSE
Genmab A/S	29/04/2024	12:59:02 PM	1,970.00	1	XCSE
Genmab A/S	29/04/2024	12:59:02 PM	1,970.00	32	XCSE
Genmab A/S	29/04/2024	12:59:02 PM	1,970.00	1	XCSE
Genmab A/S	29/04/2024	12:59:02 PM	1,970.00	12	XCSE
Genmab A/S	29/04/2024	12:59:03 PM	1,969.50	6	AQEU
Genmab A/S	29/04/2024	12:59:03 PM	1,969.50	54	AQEU
Genmab A/S	29/04/2024	12:59:04 PM	1,969.00	60	XCSE
Genmab A/S	29/04/2024	1:05:47 PM	1,968.50	29	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	1:09:08 PM	1,968.00	33	CEUX
Genmab A/S	29/04/2024	1:09:08 PM	1,968.00	4	CEUX
Genmab A/S	29/04/2024	1:09:08 PM	1,968.00	10	CEUX
Genmab A/S	29/04/2024	1:09:08 PM	1,968.00	4	XCSE
Genmab A/S	29/04/2024	1:11:05 PM	1,968.00	12	XCSE
Genmab A/S	29/04/2024	1:11:05 PM	1,968.00	25	XCSE
Genmab A/S	29/04/2024	1:11:05 PM	1,968.00	5	XCSE
Genmab A/S	29/04/2024	1:11:05 PM	1,968.00	68	XCSE
Genmab A/S	29/04/2024	1:14:54 PM	1,968.50	24	XCSE
Genmab A/S	29/04/2024	1:14:55 PM	1,968.50	24	XCSE
Genmab A/S	29/04/2024	1:14:55 PM	1,968.50	23	XCSE
Genmab A/S	29/04/2024	1:21:25 PM	1,969.50	52	CEUX
Genmab A/S	29/04/2024	1:21:25 PM	1,969.50	37	TQEX
Genmab A/S	29/04/2024	1:21:25 PM	1,969.50	9	TQEX
Genmab A/S	29/04/2024	1:21:25 PM	1,969.50	59	XCSE
Genmab A/S	29/04/2024	1:21:25 PM	1,969.50	24	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	38	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	8	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	8	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	27	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	4	CEUX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	5	CEUX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	9	CEUX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	9	CEUX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	9	CEUX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	4	CEUX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	2	AQEU
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	5	TQEX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	5	TQEX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	4	TQEX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	5	TQEX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	15	TQEX
Genmab A/S	29/04/2024	1:25:13 PM	1,971.50	8	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,971.00	36	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,970.50	37	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,970.50	49	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,970.50	49	XCSE
Genmab A/S	29/04/2024	1:25:13 PM	1,970.50	8	XCSE
Genmab A/S	29/04/2024	1:34:12 PM	1,964.00	46	XCSE
Genmab A/S	29/04/2024	1:34:12 PM	1,963.00	62	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	1:34:12 PM	1,962.50	62	CEUX
Genmab A/S	29/04/2024	1:34:12 PM	1,962.00	59	XCSE
Genmab A/S	29/04/2024	1:41:04 PM	1,959.00	63	CEUX
Genmab A/S	29/04/2024	1:41:04 PM	1,959.00	8	CEUX
Genmab A/S	29/04/2024	1:41:04 PM	1,959.00	1	CEUX
Genmab A/S	29/04/2024	1:41:05 PM	1,958.50	10	XCSE
Genmab A/S	29/04/2024	1:41:07 PM	1,958.50	37	XCSE
Genmab A/S	29/04/2024	1:46:58 PM	1,962.00	52	XCSE
Genmab A/S	29/04/2024	1:46:58 PM	1,962.00	12	XCSE
Genmab A/S	29/04/2024	1:48:31 PM	1,960.50	34	XCSE
Genmab A/S	29/04/2024	1:48:31 PM	1,960.50	27	XCSE
Genmab A/S	29/04/2024	1:48:31 PM	1,960.00	60	CEUX
Genmab A/S	29/04/2024	1:53:10 PM	1,964.50	36	CEUX
Genmab A/S	29/04/2024	1:53:10 PM	1,964.50	21	XCSE
Genmab A/S	29/04/2024	1:53:10 PM	1,964.50	3	XCSE
Genmab A/S	29/04/2024	1:54:55 PM	1,987.00	24	XCSE
Genmab A/S	29/04/2024	1:54:55 PM	1,987.00	24	XCSE
Genmab A/S	29/04/2024	1:54:55 PM	1,987.00	10	XCSE
Genmab A/S	29/04/2024	1:54:55 PM	1,987.00	4	XCSE
Genmab A/S	29/04/2024	1:56:07 PM	1,991.00	48	XCSE
Genmab A/S	29/04/2024	1:56:07 PM	1,992.00	65	XCSE
Genmab A/S	29/04/2024	1:56:09 PM	1,989.00	46	XCSE
Genmab A/S	29/04/2024	1:56:09 PM	1,989.00	67	XCSE
Genmab A/S	29/04/2024	2:04:33 PM	1,969.50	51	XCSE
Genmab A/S	29/04/2024	2:06:28 PM	1,966.50	74	CEUX
Genmab A/S	29/04/2024	2:10:04 PM	1,969.00	13	AQEU
Genmab A/S	29/04/2024	2:10:29 PM	1,968.00	66	XCSE
Genmab A/S	29/04/2024	2:10:29 PM	1,968.00	67	CEUX
Genmab A/S	29/04/2024	2:13:43 PM	1,970.00	23	CEUX
Genmab A/S	29/04/2024	2:13:43 PM	1,970.00	23	CEUX
Genmab A/S	29/04/2024	2:13:43 PM	1,970.00	15	CEUX
Genmab A/S	29/04/2024	2:13:50 PM	1,967.00	62	CEUX
Genmab A/S	29/04/2024	2:13:50 PM	1,966.50	62	XCSE
Genmab A/S	29/04/2024	2:13:50 PM	1,966.00	66	CEUX
Genmab A/S	29/04/2024	2:21:13 PM	1,965.50	64	CEUX
Genmab A/S	29/04/2024	2:21:27 PM	1,964.50	66	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	17	CEUX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	9	CEUX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	17	CEUX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	9	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	13	CEUX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	2	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	1	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	2	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	1	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	19	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	23	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	31	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	14	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	27	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	27	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	5	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	4	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	4	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	17	CEUX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	9	CEUX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	2	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	1	AQEU
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	1	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	1	TQEX
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	18	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	9	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	18	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	9	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	18	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	9	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	24	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	1	XCSE
Genmab A/S	29/04/2024	2:29:52 PM	1,965.50	24	XCSE
Genmab A/S	29/04/2024	2:29:53 PM	1,965.50	12	TQEX
Genmab A/S	29/04/2024	2:29:53 PM	1,965.50	31	XCSE
Genmab A/S	29/04/2024	2:29:53 PM	1,965.50	25	CEUX
Genmab A/S	29/04/2024	2:36:00 PM	1,961.50	21	XCSE
Genmab A/S	29/04/2024	2:36:00 PM	1,961.50	70	XCSE
Genmab A/S	29/04/2024	2:36:00 PM	1,961.50	82	CEUX
Genmab A/S	29/04/2024	2:36:00 PM	1,961.50	13	TQEX
Genmab A/S	29/04/2024	2:36:00 PM	1,961.50	12	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	2:36:00 PM	1,961.00	50	XCSE
Genmab A/S	29/04/2024	2:39:50 PM	1,960.50	51	CEUX
Genmab A/S	29/04/2024	2:42:11 PM	1,961.50	25	XCSE
Genmab A/S	29/04/2024	2:42:11 PM	1,961.50	13	XCSE
Genmab A/S	29/04/2024	2:42:11 PM	1,961.50	25	XCSE
Genmab A/S	29/04/2024	2:42:11 PM	1,961.50	22	XCSE
Genmab A/S	29/04/2024	2:42:11 PM	1,961.50	13	XCSE
Genmab A/S	29/04/2024	2:42:45 PM	1,961.00	53	XCSE
Genmab A/S	29/04/2024	2:42:45 PM	1,961.00	53	XCSE
Genmab A/S	29/04/2024	2:42:45 PM	1,960.00	49	XCSE
Genmab A/S	29/04/2024	2:42:46 PM	1,960.00	5	XCSE
Genmab A/S	29/04/2024	2:48:35 PM	1,962.50	33	XCSE
Genmab A/S	29/04/2024	2:48:35 PM	1,962.50	4	XCSE
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	28	CEUX
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	28	CEUX
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	4	AQEU
Genmab A/S	29/04/2024	2:49:34 PM	1,963.00	36	CEUX
Genmab A/S	29/04/2024	2:49:41 PM	1,963.00	36	XCSE
Genmab A/S	29/04/2024	2:49:41 PM	1,963.00	26	XCSE
Genmab A/S	29/04/2024	2:49:41 PM	1,963.00	12	XCSE
Genmab A/S	29/04/2024	2:50:52 PM	1,962.50	93	XCSE
Genmab A/S	29/04/2024	2:54:10 PM	1,963.00	24	XCSE
Genmab A/S	29/04/2024	2:54:10 PM	1,963.00	24	XCSE
Genmab A/S	29/04/2024	2:54:10 PM	1,963.00	24	XCSE
Genmab A/S	29/04/2024	2:54:10 PM	1,963.00	24	XCSE
Genmab A/S	29/04/2024	2:54:10 PM	1,963.00	1	XCSE
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	18	CEUX
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	5	TQEX
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	18	CEUX
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	2	AQEU
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	18	XCSE
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	18	XCSE
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	6	XCSE
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	4	CEUX
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	2	AQEU
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	5	TQEX
Genmab A/S	29/04/2024	2:54:52 PM	1,961.50	36	CEUX
Genmab A/S	29/04/2024	2:54:53 PM	1,961.50	24	XCSE
Genmab A/S	29/04/2024	2:54:53 PM	1,961.50	3	XCSE
Genmab A/S	29/04/2024	2:59:04 PM	1,962.50	21	AQEU
Genmab A/S	29/04/2024	2:59:04 PM	1,962.50	21	AQEU
Genmab A/S	29/04/2024	2:59:04 PM	1,962.50	21	AQEU
Genmab A/S	29/04/2024	2:59:04 PM	1,962.50	18	AQEU
Genmab A/S	29/04/2024	3:00:19 PM	1,959.50	91	CEUX
Genmab A/S	29/04/2024	3:02:40 PM	1,960.50	22	CEUX
Genmab A/S	29/04/2024	3:03:18 PM	1,961.00	40	CEUX
Genmab A/S	29/04/2024	3:03:18 PM	1,961.00	1	CEUX
Genmab A/S	29/04/2024	3:03:19 PM	1,960.00	75	CEUX
Genmab A/S	29/04/2024	3:03:19 PM	1,960.00	11	CEUX
Genmab A/S	29/04/2024	3:03:19 PM	1,959.50	34	XCSE
Genmab A/S	29/04/2024	3:03:19 PM	1,959.50	52	XCSE
Genmab A/S	29/04/2024	3:03:19 PM	1,959.00	44	XCSE
Genmab A/S	29/04/2024	3:03:19 PM	1,959.00	21	XCSE
Genmab A/S	29/04/2024	3:03:19 PM	1,959.00	23	XCSE
Genmab A/S	29/04/2024	3:03:19 PM	1,958.50	75	CEUX
Genmab A/S	29/04/2024	3:03:19 PM	1,958.50	7	CEUX
Genmab A/S	29/04/2024	3:03:19 PM	1,958.50	7	CEUX
Genmab A/S	29/04/2024	3:06:03 PM	1,953.00	41	CEUX
Genmab A/S	29/04/2024	3:14:19 PM	1,958.00	23	XCSE
Genmab A/S	29/04/2024	3:14:19 PM	1,958.00	23	XCSE
Genmab A/S	29/04/2024	3:14:19 PM	1,958.00	23	XCSE
Genmab A/S	29/04/2024	3:14:19 PM	1,958.00	23	XCSE
Genmab A/S	29/04/2024	3:14:19 PM	1,958.00	6	XCSE
Genmab A/S	29/04/2024	3:15:10 PM	1,955.00	93	CEUX
Genmab A/S	29/04/2024	3:17:01 PM	1,954.00	48	CEUX
Genmab A/S	29/04/2024	3:17:01 PM	1,954.00	3	AQEU
Genmab A/S	29/04/2024	3:17:01 PM	1,954.00	4	AQEU
Genmab A/S	29/04/2024	3:17:01 PM	1,954.00	8	TQEX
Genmab A/S	29/04/2024	3:17:01 PM	1,954.00	53	XCSE
Genmab A/S	29/04/2024	3:20:54 PM	1,956.50	26	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	3:20:54 PM	1,956.50	26	XCSE
Genmab A/S	29/04/2024	3:20:54 PM	1,956.50	20	XCSE
Genmab A/S	29/04/2024	3:20:54 PM	1,956.50	26	XCSE
Genmab A/S	29/04/2024	3:20:54 PM	1,956.50	19	XCSE
Genmab A/S	29/04/2024	3:22:35 PM	1,956.50	44	CEUX
Genmab A/S	29/04/2024	3:22:35 PM	1,956.50	7	TQEX
Genmab A/S	29/04/2024	3:22:35 PM	1,956.50	49	XCSE
Genmab A/S	29/04/2024	3:23:26 PM	1,953.50	41	XCSE
Genmab A/S	29/04/2024	3:23:26 PM	1,953.50	14	XCSE
Genmab A/S	29/04/2024	3:23:26 PM	1,953.50	19	XCSE
Genmab A/S	29/04/2024	3:23:26 PM	1,953.50	8	XCSE
Genmab A/S	29/04/2024	3:23:26 PM	1,953.50	14	XCSE
Genmab A/S	29/04/2024	3:24:45 PM	1,952.00	49	CEUX
Genmab A/S	29/04/2024	3:24:45 PM	1,952.00	70	CEUX
Genmab A/S	29/04/2024	3:25:48 PM	1,948.00	26	XCSE
Genmab A/S	29/04/2024	3:27:39 PM	1,947.50	46	XCSE
Genmab A/S	29/04/2024	3:27:39 PM	1,947.50	52	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	24	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	18	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	51	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	24	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	27	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	18	XCSE
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	61	CEUX
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	9	AQEU
Genmab A/S	29/04/2024	3:29:51 PM	1,950.50	10	TQEX
Genmab A/S	29/04/2024	3:31:00 PM	1,951.50	10	XCSE
Genmab A/S	29/04/2024	3:31:00 PM	1,951.50	32	XCSE
Genmab A/S	29/04/2024	3:31:00 PM	1,951.50	40	XCSE
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	10	CEUX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	10	CEUX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	10	CEUX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	5	TQEX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	5	TQEX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	5	TQEX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	10	CEUX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	5	TQEX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	5	TQEX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	4	CEUX
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	9	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	9	XCSE
Genmab A/S	29/04/2024	3:32:31 PM	1,963.50	9	XCSE
Genmab A/S	29/04/2024	3:33:02 PM	1,961.50	25	XCSE
Genmab A/S	29/04/2024	3:33:02 PM	1,961.50	25	XCSE
Genmab A/S	29/04/2024	3:33:02 PM	1,961.50	23	XCSE
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	41	CEUX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	21	CEUX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	20	CEUX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	AQEU
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	15	AQEU
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	AQEU
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	AQEU
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	AQEU
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	TQEX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	TQEX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	TQEX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	6	TQEX
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	44	XCSE
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	44	XCSE
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	1	XCSE
Genmab A/S	29/04/2024	3:34:36 PM	1,967.50	19	XCSE
Genmab A/S	29/04/2024	3:35:40 PM	1,967.00	26	CEUX
Genmab A/S	29/04/2024	3:35:40 PM	1,967.00	4	AQEU
Genmab A/S	29/04/2024	3:35:40 PM	1,967.00	5	TQEX
Genmab A/S	29/04/2024	3:35:40 PM	1,967.00	28	XCSE
Genmab A/S	29/04/2024	3:35:40 PM	1,967.00	28	XCSE
Genmab A/S	29/04/2024	3:35:40 PM	1,967.00	11	XCSE
Genmab A/S	29/04/2024	3:36:52 PM	1,968.50	71	CEUX
Genmab A/S	29/04/2024	3:36:52 PM	1,968.50	6	TQEX
Genmab A/S	29/04/2024	3:36:52 PM	1,968.50	5	TQEX
Genmab A/S	29/04/2024	3:36:52 PM	1,968.50	79	XCSE
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	29	XCSE
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	28	XCSE
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	22	XCSE
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	35	XCSE
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	8	AQEU
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	12	AQEU
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	8	AQEU
Genmab A/S	29/04/2024	3:37:52 PM	1,966.50	12	AQEU
Genmab A/S	29/04/2024	3:38:55 PM	1,968.00	7	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	3:38:55 PM	1,968.00	45	CEUX
Genmab A/S	29/04/2024	3:38:55 PM	1,968.00	7	AQEU
Genmab A/S	29/04/2024	3:38:55 PM	1,968.00	13	XCSE
Genmab A/S	29/04/2024	3:38:55 PM	1,968.00	37	XCSE
Genmab A/S	29/04/2024	3:40:30 PM	1,965.50	24	XCSE
Genmab A/S	29/04/2024	3:40:30 PM	1,965.50	19	XCSE
Genmab A/S	29/04/2024	3:40:31 PM	1,965.50	3	XCSE
Genmab A/S	29/04/2024	3:40:31 PM	1,965.50	17	XCSE
Genmab A/S	29/04/2024	3:40:31 PM	1,965.50	3	XCSE
Genmab A/S	29/04/2024	3:40:31 PM	1,965.50	4	XCSE
Genmab A/S	29/04/2024	3:40:31 PM	1,965.50	6	XCSE
Genmab A/S	29/04/2024	3:40:31 PM	1,965.50	10	XCSE
Genmab A/S	29/04/2024	3:41:08 PM	1,965.50	6	XCSE
Genmab A/S	29/04/2024	3:41:08 PM	1,965.50	20	XCSE
Genmab A/S	29/04/2024	3:41:08 PM	1,965.50	20	XCSE
Genmab A/S	29/04/2024	3:41:08 PM	1,965.50	21	XCSE
Genmab A/S	29/04/2024	3:41:08 PM	1,965.50	5	XCSE
Genmab A/S	29/04/2024	3:41:08 PM	1,965.50	26	XCSE
Genmab A/S	29/04/2024	3:41:09 PM	1,965.50	3	XCSE
Genmab A/S	29/04/2024	3:43:46 PM	1,967.50	35	AQEU
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	36	CEUX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	6	CEUX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	15	CEUX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	28	CEUX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	6	AQEU
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	6	AQEU
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	6	AQEU
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	7	TQEX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	7	TQEX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	7	TQEX
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	26	XCSE
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	20	XCSE
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	39	XCSE
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	7	XCSE
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	2	XCSE
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	39	XCSE
Genmab A/S	29/04/2024	3:43:47 PM	1,967.00	4	XCSE
Genmab A/S	29/04/2024	3:45:17 PM	1,967.50	22	XCSE
Genmab A/S	29/04/2024	3:45:17 PM	1,967.50	5	XCSE
Genmab A/S	29/04/2024	3:45:17 PM	1,967.50	5	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	3:45:17 PM	1,967.50	22	XCSE
Genmab A/S	29/04/2024	3:45:17 PM	1,967.50	23	XCSE
Genmab A/S	29/04/2024	3:45:17 PM	1,967.50	5	XCSE
Genmab A/S	29/04/2024	3:45:29 PM	1,967.00	55	AQEU
Genmab A/S	29/04/2024	3:45:48 PM	1,966.50	33	CEUX
Genmab A/S	29/04/2024	3:45:48 PM	1,966.50	46	XCSE
Genmab A/S	29/04/2024	3:45:48 PM	1,966.50	21	CEUX
Genmab A/S	29/04/2024	3:47:08 PM	1,965.00	19	CEUX
Genmab A/S	29/04/2024	3:47:08 PM	1,965.00	32	CEUX
Genmab A/S	29/04/2024	3:47:08 PM	1,965.00	8	AQEU
Genmab A/S	29/04/2024	3:47:08 PM	1,965.00	7	TQEX
Genmab A/S	29/04/2024	3:47:08 PM	1,965.00	57	XCSE
Genmab A/S	29/04/2024	3:48:46 PM	1,974.00	48	CEUX
Genmab A/S	29/04/2024	3:48:46 PM	1,974.00	7	AQEU
Genmab A/S	29/04/2024	3:48:46 PM	1,974.00	8	TQEX
Genmab A/S	29/04/2024	3:48:46 PM	1,974.00	54	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	44	CEUX
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	7	AQEU
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	7	TQEX
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	31	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	19	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	23	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	30	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	23	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	19	XCSE
Genmab A/S	29/04/2024	3:50:50 PM	1,973.00	17	XCSE
Genmab A/S	29/04/2024	3:52:47 PM	1,970.00	16	CEUX
Genmab A/S	29/04/2024	3:52:47 PM	1,970.00	8	AQEU
Genmab A/S	29/04/2024	3:52:47 PM	1,970.00	19	CEUX
Genmab A/S	29/04/2024	3:52:47 PM	1,970.00	4	TQEX
Genmab A/S	29/04/2024	3:52:47 PM	1,970.00	16	CEUX
Genmab A/S	29/04/2024	3:52:47 PM	1,970.00	57	XCSE
Genmab A/S	29/04/2024	3:53:13 PM	1,971.00	25	XCSE
Genmab A/S	29/04/2024	3:53:13 PM	1,971.00	25	XCSE
Genmab A/S	29/04/2024	3:53:13 PM	1,971.00	25	XCSE
Genmab A/S	29/04/2024	3:53:13 PM	1,971.00	25	XCSE
Genmab A/S	29/04/2024	3:53:14 PM	1,971.00	18	XCSE
Genmab A/S	29/04/2024	3:55:04 PM	1,969.50	9	AQEU
Genmab A/S	29/04/2024	3:55:04 PM	1,969.50	65	XCSE
Genmab A/S	29/04/2024	3:55:04 PM	1,969.50	35	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	3:55:04 PM	1,969.50	3	TQEX
Genmab A/S	29/04/2024	3:55:04 PM	1,969.50	29	CEUX
Genmab A/S	29/04/2024	3:57:04 PM	1,972.00	46	XCSE
Genmab A/S	29/04/2024	3:57:04 PM	1,972.00	45	XCSE
Genmab A/S	29/04/2024	3:57:04 PM	1,972.00	41	CEUX
Genmab A/S	29/04/2024	3:57:04 PM	1,972.00	13	CEUX
Genmab A/S	29/04/2024	3:57:04 PM	1,972.00	37	XCSE
Genmab A/S	29/04/2024	3:57:04 PM	1,972.00	17	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	41	CEUX
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	6	AQEU
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	7	TQEX
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	46	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	12	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	14	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	14	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	12	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	14	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	12	XCSE
Genmab A/S	29/04/2024	3:58:51 PM	1,971.50	18	XCSE
Genmab A/S	29/04/2024	3:59:50 PM	1,971.00	22	XCSE
Genmab A/S	29/04/2024	3:59:50 PM	1,971.00	2	XCSE
Genmab A/S	29/04/2024	3:59:50 PM	1,971.00	2	XCSE
Genmab A/S	29/04/2024	3:59:51 PM	1,971.00	22	XCSE
Genmab A/S	29/04/2024	3:59:51 PM	1,971.00	24	XCSE
Genmab A/S	29/04/2024	3:59:51 PM	1,971.00	20	XCSE
Genmab A/S	29/04/2024	4:02:41 PM	1,974.00	34	CEUX
Genmab A/S	29/04/2024	4:02:41 PM	1,974.00	7	CEUX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	14	CEUX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	14	XCSE
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	14	CEUX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	8	CEUX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	2	AQEU
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	8	AQEU
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	8	TQEX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	14	XCSE
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	41	XCSE
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	8	XCSE
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	35	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	35	CEUX
Genmab A/S	29/04/2024	4:02:42 PM	1,974.00	18	CEUX
Genmab A/S	29/04/2024	4:03:14 PM	1,973.50	27	XCSE
Genmab A/S	29/04/2024	4:03:14 PM	1,973.50	24	XCSE
Genmab A/S	29/04/2024	4:03:15 PM	1,973.50	3	XCSE
Genmab A/S	29/04/2024	4:03:15 PM	1,973.50	36	CEUX
Genmab A/S	29/04/2024	4:03:15 PM	1,973.50	20	XCSE
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	5	TQEX
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	4	CEUX
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	4	AQEU
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	3	TQEX
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	2	TQEX
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	27	XCSE
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	21	XCSE
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	13	XCSE
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	11	XCSE
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	36	CEUX
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	8	TQEX
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	10	XCSE
Genmab A/S	29/04/2024	4:05:43 PM	1,972.00	38	XCSE
Genmab A/S	29/04/2024	4:06:54 PM	1,973.50	48	CEUX
Genmab A/S	29/04/2024	4:06:54 PM	1,973.50	7	AQEU
Genmab A/S	29/04/2024	4:06:54 PM	1,973.50	8	TQEX
Genmab A/S	29/04/2024	4:06:54 PM	1,973.50	41	XCSE
Genmab A/S	29/04/2024	4:06:54 PM	1,973.50	1	XCSE
Genmab A/S	29/04/2024	4:06:54 PM	1,973.50	53	XCSE
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	52	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	5	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	7	CEUX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	1	AQEU
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	8	AQEU
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	1	AQEU
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	8	TQEX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	2	TQEX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	12	TQEX
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	9	XCSE
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	21	XCSE
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	23	XCSE
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	13	XCSE
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	9	XCSE
Genmab A/S	29/04/2024	4:09:36 PM	1,974.00	25	XCSE
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	5	CEUX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	32	CEUX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	5	CEUX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	18	CEUX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	6	AQEU
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	2	TQEX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	41	XCSE
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	17	XCSE
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	8	XCSE
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	36	CEUX
Genmab A/S	29/04/2024	4:12:11 PM	1,974.50	33	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	41	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	56	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	14	CEUX
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	37	CEUX
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	8	AQEU
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	1	TQEX
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	6	TQEX
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	26	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	12	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	3	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	12	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	2	XCSE
Genmab A/S	29/04/2024	4:14:25 PM	1,974.50	23	XCSE
Genmab A/S	29/04/2024	4:15:37 PM	1,973.50	10	XCSE
Genmab A/S	29/04/2024	4:15:37 PM	1,973.50	52	XCSE
Genmab A/S	29/04/2024	4:15:37 PM	1,973.50	55	CEUX
Genmab A/S	29/04/2024	4:15:39 PM	1,973.50	15	CEUX
Genmab A/S	29/04/2024	4:15:39 PM	1,973.50	2	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	7	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	12	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	8	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	19	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	12	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	2	AQEU
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	19	XCSE
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	19	XCSE
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	19	XCSE
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	9	XCSE
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	2	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	36	CEUX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:17:28 PM	1,974.00	1	TQEX
Genmab A/S	29/04/2024	4:17:30 PM	1,974.00	28	XCSE
Genmab A/S	29/04/2024	4:17:30 PM	1,974.00	1	XCSE
Genmab A/S	29/04/2024	4:17:30 PM	1,974.00	4	XCSE
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	58	CEUX
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	10	CEUX
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	8	AQEU
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	1	AQEU
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	1	AQEU
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	9	TQEX
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:20:56 PM	1,974.00	37	TQEX
Genmab A/S	29/04/2024	4:22:28 PM	1,976.50	4	TQEX
Genmab A/S	29/04/2024	4:22:28 PM	1,976.50	28	CEUX
Genmab A/S	29/04/2024	4:22:28 PM	1,976.50	28	CEUX
Genmab A/S	29/04/2024	4:22:28 PM	1,976.50	9	CEUX
Genmab A/S	29/04/2024	4:22:28 PM	1,976.50	1	TQEX
Genmab A/S	29/04/2024	4:22:28 PM	1,976.50	37	TQEX
Genmab A/S	29/04/2024	4:23:25 PM	1,976.50	28	XCSE
Genmab A/S	29/04/2024	4:23:30 PM	1,976.50	26	CEUX
Genmab A/S	29/04/2024	4:23:30 PM	1,976.50	3	XCSE
Genmab A/S	29/04/2024	4:23:30 PM	1,976.50	26	CEUX
Genmab A/S	29/04/2024	4:23:30 PM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	16	CEUX
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	1	CEUX
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	25	XCSE
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	15	XCSE
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	9	CEUX
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	4	AQEU
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	13	XCSE
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	36	CEUX
Genmab A/S	29/04/2024	4:23:31 PM	1,976.50	27	XCSE
Genmab A/S	29/04/2024	4:25:09 PM	1,975.00	81	CEUX
Genmab A/S	29/04/2024	4:25:09 PM	1,975.00	6	TQEX
Genmab A/S	29/04/2024	4:25:09 PM	1,975.00	5	TQEX
Genmab A/S	29/04/2024	4:25:09 PM	1,975.00	25	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	4	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	13	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	5	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	13	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	5	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	3	AQEU
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	3	AQEU
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	1	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	4	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	2	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	4	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	7	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	17	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	24	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	3	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	22	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	2	XCSE
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	17	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	17	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	14	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	5	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	1	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	5	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	1	TQEX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	1	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	2	CEUX
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	3	AQEU
Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	18	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:27:45 PM	1,976.00	2	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	13	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	4	TQEX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	9	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	17	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	5	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	3	AQEU
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	3	AQEU
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	4	TQEX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	4	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	18	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	6	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	4	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	20	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	20	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	4	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	4	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	16	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	6	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	3	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	3	TQEX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	1	TQEX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	9	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	5	TQEX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	11	XCSE
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	36	CEUX
Genmab A/S	29/04/2024	4:27:46 PM	1,976.00	2	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	10	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	2	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	7	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	1	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	9	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	1	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	4	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	2	AQEU
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	2	AQEU
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	9	XCSE
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	1	XCSE
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	9	XCSE
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	10	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	10	XCSE
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	2	AQEU
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	1	AQEU
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	5	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	10	CEUX
Genmab A/S	29/04/2024	4:29:46 PM	1,976.00	2	CEUX
Genmab A/S	29/04/2024	4:29:47 PM	1,976.00	10	CEUX
Genmab A/S	29/04/2024	4:29:47 PM	1,976.00	10	XCSE
Genmab A/S	29/04/2024	4:29:48 PM	1,976.00	6	CEUX
Genmab A/S	29/04/2024	4:29:48 PM	1,976.00	4	CEUX
Genmab A/S	29/04/2024	4:29:48 PM	1,976.00	5	CEUX
Genmab A/S	29/04/2024	4:29:48 PM	1,976.00	2	AQEU
Genmab A/S	29/04/2024	4:29:48 PM	1,976.00	10	XCSE
Genmab A/S	29/04/2024	4:29:48 PM	1,976.00	10	XCSE
Genmab A/S	29/04/2024	4:29:49 PM	1,976.00	4	CEUX
Genmab A/S	29/04/2024	4:29:49 PM	1,976.00	2	AQEU
Genmab A/S	29/04/2024	4:29:49 PM	1,976.00	8	XCSE
Genmab A/S	29/04/2024	4:29:49 PM	1,976.00	36	CEUX
Genmab A/S	29/04/2024	4:29:49 PM	1,976.00	4	AQEU
Genmab A/S	29/04/2024	4:31:54 PM	1,978.00	33	CEUX
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	3	TQEX
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	3	TQEX
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	25	CEUX
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	17	XCSE
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	21	XCSE
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	17	XCSE
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	21	XCSE
Genmab A/S	29/04/2024	4:33:04 PM	1,978.50	17	XCSE
Genmab A/S	29/04/2024	4:33:14 PM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	4:33:14 PM	1,978.00	1	AQEU
Genmab A/S	29/04/2024	4:33:14 PM	1,978.00	5	TQEX
Genmab A/S	29/04/2024	4:33:14 PM	1,978.00	2	XCSE
Genmab A/S	29/04/2024	4:33:16 PM	1,978.00	12	CEUX
Genmab A/S	29/04/2024	4:33:16 PM	1,978.00	1	AQEU
Genmab A/S	29/04/2024	4:33:16 PM	1,978.00	8	XCSE
Genmab A/S	29/04/2024	4:34:34 PM	1,977.50	78	CEUX
Genmab A/S	29/04/2024	4:34:34 PM	1,977.50	11	AQEU
Genmab A/S	29/04/2024	4:34:34 PM	1,977.50	13	TQEX
Genmab A/S	29/04/2024	4:34:34 PM	1,977.50	74	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:34:34 PM	1,977.50	14	XCSE
Genmab A/S	29/04/2024	4:35:53 PM	1,976.50	2	XCSE
Genmab A/S	29/04/2024	4:37:18 PM	1,977.00	9	CEUX
Genmab A/S	29/04/2024	4:37:18 PM	1,977.00	8	CEUX
Genmab A/S	29/04/2024	4:37:26 PM	1,977.50	12	TQEX
Genmab A/S	29/04/2024	4:37:32 PM	1,977.50	16	CEUX
Genmab A/S	29/04/2024	4:37:32 PM	1,977.50	11	CEUX
Genmab A/S	29/04/2024	4:37:32 PM	1,977.50	8	TQEX
Genmab A/S	29/04/2024	4:37:53 PM	1,977.50	36	CEUX
Genmab A/S	29/04/2024	4:37:53 PM	1,977.50	5	CEUX
Genmab A/S	29/04/2024	4:38:14 PM	1,977.50	13	CEUX
Genmab A/S	29/04/2024	4:38:14 PM	1,977.50	4	CEUX
Genmab A/S	29/04/2024	4:38:14 PM	1,977.50	9	CEUX
Genmab A/S	29/04/2024	4:38:14 PM	1,977.50	9	CEUX
Genmab A/S	29/04/2024	4:38:21 PM	1,976.50	4	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	29	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	10	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	33	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	10	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	8	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	10	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	10	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	4	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	5	TQEX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	35	XCSE
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	9	XCSE
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	37	XCSE
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	7	XCSE
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	10	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	10	CEUX
Genmab A/S	29/04/2024	4:38:22 PM	1,976.50	7	CEUX
Genmab A/S	29/04/2024	4:38:52 PM	1,977.50	8	CEUX
Genmab A/S	29/04/2024	4:38:52 PM	1,977.50	5	TQEX
Genmab A/S	29/04/2024	4:38:52 PM	1,977.50	8	XCSE
Genmab A/S	29/04/2024	4:38:52 PM	1,977.50	30	XCSE
Genmab A/S	29/04/2024	4:38:53 PM	1,977.50	1	CEUX
Genmab A/S	29/04/2024	4:39:03 PM	1,977.50	9	CEUX
Genmab A/S	29/04/2024	4:39:03 PM	1,977.50	8	XCSE
Genmab A/S	29/04/2024	4:39:03 PM	1,977.50	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:39:03 PM	1,977.50	5	XCSE
Genmab A/S	29/04/2024	4:39:14 PM	1,977.50	22	XCSE
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	16	XCSE
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	9	XCSE
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	4	XCSE
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	12	XCSE
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	15	CEUX
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	3	AQEU
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	4	XCSE
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	15	CEUX
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	3	AQEU
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	23	CEUX
Genmab A/S	29/04/2024	4:39:36 PM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	18	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	18	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	18	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	18	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	18	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	8	CEUX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	2	AQEU
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	38	AQEU
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	5	TQEX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	37	TQEX
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	18	XCSE
Genmab A/S	29/04/2024	4:41:09 PM	1,975.00	88	XCSE
Genmab A/S	29/04/2024	4:41:10 PM	1,974.00	5	TQEX
Genmab A/S	29/04/2024	4:41:10 PM	1,974.00	3	TQEX
Genmab A/S	29/04/2024	4:41:10 PM	1,974.00	2	TQEX
Genmab A/S	29/04/2024	4:41:10 PM	1,974.00	21	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	3	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	2	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	37	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	2	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	23	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	8	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	2	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	11	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	3	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	2	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	2	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	3	TQEX
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:01 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	9	XCSE
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	10	CEUX
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	1	AQEU
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	5	TQEX
Genmab A/S	29/04/2024	4:45:02 PM	1,974.50	8	XCSE
Genmab A/S	29/04/2024	4:45:28 PM	1,973.50	2	TQEX
Genmab A/S	29/04/2024	4:45:58 PM	1,977.00	19	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:45:58 PM	1,977.00	65	XCSE
Genmab A/S	29/04/2024	4:45:58 PM	1,977.00	19	XCSE
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	19	CEUX
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	2	AQEU
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	5	TQEX
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	37	TQEX
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	19	XCSE
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	19	CEUX
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	2	CEUX
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	2	AQEU
Genmab A/S	29/04/2024	4:46:02 PM	1,977.00	19	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	2	AQEU
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	36	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	10	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	41	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	9	CEUX
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	21	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	21	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	7	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	7	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	7	XCSE
Genmab A/S	29/04/2024	4:46:34 PM	1,978.50	19	AQEU
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	11	CEUX
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	6	CEUX
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	2	CEUX
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	3	CEUX
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	12	XCSE
Genmab A/S	29/04/2024	4:47:03 PM	1,978.50	12	XCSE
Genmab A/S	29/04/2024	4:47:20 PM	1,978.50	23	XCSE
Genmab A/S	29/04/2024	4:47:20 PM	1,978.50	2	XCSE
Genmab A/S	29/04/2024	4:47:20 PM	1,978.50	23	XCSE
Genmab A/S	29/04/2024	4:47:20 PM	1,978.50	23	XCSE
Genmab A/S	29/04/2024	4:47:20 PM	1,978.50	23	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	3	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	18	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	1	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	18	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	22	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	1	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	11	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	10	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	14	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	14	XCSE
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	22	CEUX
Genmab A/S	29/04/2024	4:47:29 PM	1,977.50	22	CEUX
Genmab A/S	29/04/2024	4:49:48 PM	1,973.00	23	XCSE
Genmab A/S	29/04/2024	4:49:49 PM	1,973.00	9	XCSE
Genmab A/S	29/04/2024	4:50:15 PM	1,974.00	13	CEUX
Genmab A/S	29/04/2024	4:50:15 PM	1,974.00	20	CEUX
Genmab A/S	29/04/2024	4:50:15 PM	1,974.00	3	CEUX
Genmab A/S	29/04/2024	4:54:05 PM	1,975.50	41	XCSE
Genmab A/S	30/04/2024	9:06:27 AM	1,982.00	45	XCSE
Genmab A/S	30/04/2024	9:09:43 AM	1,984.50	4	CEUX
Genmab A/S	30/04/2024	9:09:43 AM	1,984.50	16	CEUX
Genmab A/S	30/04/2024	9:09:44 AM	1,984.50	16	CEUX
Genmab A/S	30/04/2024	9:09:44 AM	1,984.50	4	CEUX
Genmab A/S	30/04/2024	9:10:10 AM	1,980.00	7	TQEX
Genmab A/S	30/04/2024	9:10:10 AM	1,980.00	27	TQEX
Genmab A/S	30/04/2024	9:15:00 AM	1,979.50	36	CEUX
Genmab A/S	30/04/2024	9:18:20 AM	1,980.00	19	CEUX
Genmab A/S	30/04/2024	9:18:20 AM	1,980.00	17	CEUX
Genmab A/S	30/04/2024	9:21:37 AM	1,978.00	37	CEUX
Genmab A/S	30/04/2024	9:26:57 AM	1,975.00	23	CEUX
Genmab A/S	30/04/2024	9:26:57 AM	1,975.00	22	CEUX
Genmab A/S	30/04/2024	9:26:57 AM	1,975.00	20	CEUX
Genmab A/S	30/04/2024	9:32:31 AM	1,970.50	22	CEUX
Genmab A/S	30/04/2024	9:35:20 AM	1,971.00	17	CEUX
Genmab A/S	30/04/2024	9:35:20 AM	1,971.00	22	CEUX
Genmab A/S	30/04/2024	9:35:20 AM	1,971.00	2	CEUX
Genmab A/S	30/04/2024	9:36:42 AM	1,968.50	37	XCSE
Genmab A/S	30/04/2024	9:44:34 AM	1,970.00	5	XCSE
Genmab A/S	30/04/2024	9:44:34 AM	1,970.00	32	XCSE
Genmab A/S	30/04/2024	9:49:02 AM	1,968.50	41	XCSE
Genmab A/S	30/04/2024	9:53:56 AM	1,967.50	39	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	9:59:33 AM	1,966.50	37	CEUX
Genmab A/S	30/04/2024	10:00:04 AM	1,967.00	26	CEUX
Genmab A/S	30/04/2024	10:00:04 AM	1,967.00	13	CEUX
Genmab A/S	30/04/2024	10:08:01 AM	1,975.00	44	XCSE
Genmab A/S	30/04/2024	10:14:38 AM	1,971.00	37	XCSE
Genmab A/S	30/04/2024	10:19:07 AM	1,967.50	42	CEUX
Genmab A/S	30/04/2024	10:27:33 AM	1,970.00	37	CEUX
Genmab A/S	30/04/2024	10:30:29 AM	1,968.50	34	CEUX
Genmab A/S	30/04/2024	10:30:29 AM	1,968.50	7	CEUX
Genmab A/S	30/04/2024	10:38:26 AM	1,968.50	35	TQEX
Genmab A/S	30/04/2024	10:42:35 AM	1,967.00	27	CEUX
Genmab A/S	30/04/2024	10:42:35 AM	1,967.00	11	CEUX
Genmab A/S	30/04/2024	10:44:43 AM	1,965.00	3	XCSE
Genmab A/S	30/04/2024	10:44:43 AM	1,965.00	31	XCSE
Genmab A/S	30/04/2024	10:44:49 AM	1,964.00	34	XCSE
Genmab A/S	30/04/2024	10:56:07 AM	1,958.00	31	XCSE
Genmab A/S	30/04/2024	10:59:20 AM	1,955.00	44	XCSE
Genmab A/S	30/04/2024	11:12:43 AM	1,958.00	38	CEUX
Genmab A/S	30/04/2024	11:17:20 AM	1,962.00	11	CEUX
Genmab A/S	30/04/2024	11:17:20 AM	1,962.00	30	CEUX
Genmab A/S	30/04/2024	11:24:32 AM	1,968.50	35	XCSE
Genmab A/S	30/04/2024	11:26:27 AM	1,968.00	37	TQEX
Genmab A/S	30/04/2024	11:26:27 AM	1,968.00	5	TQEX
Genmab A/S	30/04/2024	11:26:27 AM	1,968.00	1	TQEX
Genmab A/S	30/04/2024	11:26:27 AM	1,968.00	1	TQEX
Genmab A/S	30/04/2024	11:30:11 AM	1,968.00	36	XCSE
Genmab A/S	30/04/2024	11:32:44 AM	1,968.00	43	CEUX
Genmab A/S	30/04/2024	11:32:44 AM	1,968.00	3	CEUX
Genmab A/S	30/04/2024	11:33:47 AM	1,967.00	13	CEUX
Genmab A/S	30/04/2024	11:33:47 AM	1,967.00	27	CEUX
Genmab A/S	30/04/2024	11:38:42 AM	1,967.50	41	XCSE
Genmab A/S	30/04/2024	11:39:22 AM	1,967.00	42	XCSE
Genmab A/S	30/04/2024	11:43:24 AM	1,966.00	40	CEUX
Genmab A/S	30/04/2024	11:43:24 AM	1,966.00	40	XCSE
Genmab A/S	30/04/2024	11:46:27 AM	1,964.50	22	XCSE
Genmab A/S	30/04/2024	11:46:27 AM	1,964.50	15	XCSE
Genmab A/S	30/04/2024	11:48:39 AM	1,963.00	36	XCSE
Genmab A/S	30/04/2024	11:50:30 AM	1,962.50	44	CEUX
Genmab A/S	30/04/2024	11:53:01 AM	1,961.00	49	CEUX
Genmab A/S	30/04/2024	11:55:39 AM	1,960.00	9	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	11:55:39 AM	1,960.00	39	XCSE
Genmab A/S	30/04/2024	11:55:39 AM	1,959.00	4	XCSE
Genmab A/S	30/04/2024	11:55:42 AM	1,959.00	42	XCSE
Genmab A/S	30/04/2024	12:00:40 PM	1,956.00	39	XCSE
Genmab A/S	30/04/2024	12:00:40 PM	1,956.00	38	XCSE
Genmab A/S	30/04/2024	12:00:40 PM	1,955.50	41	CEUX
Genmab A/S	30/04/2024	12:00:42 PM	1,955.00	7	XCSE
Genmab A/S	30/04/2024	12:00:42 PM	1,955.00	33	XCSE
Genmab A/S	30/04/2024	12:08:26 PM	1,955.00	40	TQEX
Genmab A/S	30/04/2024	12:08:26 PM	1,955.50	41	AQEU
Genmab A/S	30/04/2024	12:08:26 PM	1,955.50	38	TQEX
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	12	XCSE
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	48	XCSE
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	6	CEUX
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	62	CEUX
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	10	AQEU
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	10	TQEX
Genmab A/S	30/04/2024	12:19:11 PM	1,955.00	15	XCSE
Genmab A/S	30/04/2024	12:29:03 PM	1,958.50	37	XCSE
Genmab A/S	30/04/2024	12:29:04 PM	1,958.00	37	XCSE
Genmab A/S	30/04/2024	12:32:47 PM	1,962.00	38	XCSE
Genmab A/S	30/04/2024	12:32:47 PM	1,962.00	2	XCSE
Genmab A/S	30/04/2024	12:32:47 PM	1,961.50	39	XCSE
Genmab A/S	30/04/2024	12:32:48 PM	1,961.00	37	TQEX
Genmab A/S	30/04/2024	12:39:31 PM	1,959.00	9	XCSE
Genmab A/S	30/04/2024	12:39:31 PM	1,959.00	27	XCSE
Genmab A/S	30/04/2024	12:43:42 PM	1,959.50	8	AQEU
Genmab A/S	30/04/2024	12:43:42 PM	1,959.50	28	TQEX
Genmab A/S	30/04/2024	12:45:02 PM	1,959.50	35	XCSE
Genmab A/S	30/04/2024	12:47:10 PM	1,960.50	38	CEUX
Genmab A/S	30/04/2024	12:49:02 PM	1,962.50	36	CEUX
Genmab A/S	30/04/2024	12:52:01 PM	1,963.00	46	CEUX
Genmab A/S	30/04/2024	12:53:22 PM	1,961.00	49	XCSE
Genmab A/S	30/04/2024	12:58:09 PM	1,965.00	8	XCSE
Genmab A/S	30/04/2024	12:58:09 PM	1,965.00	35	XCSE
Genmab A/S	30/04/2024	1:00:01 PM	1,966.00	26	XCSE
Genmab A/S	30/04/2024	1:00:01 PM	1,966.00	14	XCSE
Genmab A/S	30/04/2024	1:03:02 PM	1,966.50	38	XCSE
Genmab A/S	30/04/2024	1:05:50 PM	1,966.00	34	XCSE
Genmab A/S	30/04/2024	1:07:39 PM	1,965.50	37	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	1:10:05 PM	1,964.50	37	CEUX
Genmab A/S	30/04/2024	1:14:52 PM	1,966.00	8	CEUX
Genmab A/S	30/04/2024	1:14:52 PM	1,966.00	8	CEUX
Genmab A/S	30/04/2024	1:14:52 PM	1,966.00	8	TQEX
Genmab A/S	30/04/2024	1:14:52 PM	1,966.00	16	XCSE
Genmab A/S	30/04/2024	1:15:09 PM	1,965.50	8	CEUX
Genmab A/S	30/04/2024	1:15:09 PM	1,965.50	30	CEUX
Genmab A/S	30/04/2024	1:18:52 PM	1,961.00	39	XCSE
Genmab A/S	30/04/2024	1:21:41 PM	1,959.50	38	CEUX
Genmab A/S	30/04/2024	1:22:57 PM	1,957.00	41	CEUX
Genmab A/S	30/04/2024	1:26:30 PM	1,957.50	43	XCSE
Genmab A/S	30/04/2024	1:30:15 PM	1,957.00	44	TQEX
Genmab A/S	30/04/2024	1:32:59 PM	1,957.00	8	CEUX
Genmab A/S	30/04/2024	1:32:59 PM	1,957.00	32	CEUX
Genmab A/S	30/04/2024	1:34:29 PM	1,957.50	23	XCSE
Genmab A/S	30/04/2024	1:34:29 PM	1,957.50	20	XCSE
Genmab A/S	30/04/2024	1:34:29 PM	1,957.50	18	XCSE
Genmab A/S	30/04/2024	1:39:39 PM	1,956.50	36	XCSE
Genmab A/S	30/04/2024	1:39:39 PM	1,956.00	39	XCSE
Genmab A/S	30/04/2024	1:39:39 PM	1,955.50	37	CEUX
Genmab A/S	30/04/2024	1:46:52 PM	1,956.50	38	CEUX
Genmab A/S	30/04/2024	1:50:37 PM	1,957.50	12	CEUX
Genmab A/S	30/04/2024	1:50:37 PM	1,957.50	27	CEUX
Genmab A/S	30/04/2024	1:53:07 PM	1,961.00	34	XCSE
Genmab A/S	30/04/2024	1:53:07 PM	1,961.00	1	XCSE
Genmab A/S	30/04/2024	1:55:26 PM	1,961.50	4	TQEX
Genmab A/S	30/04/2024	1:55:26 PM	1,961.50	25	XCSE
Genmab A/S	30/04/2024	1:57:22 PM	1,961.50	8	AQEU
Genmab A/S	30/04/2024	1:57:22 PM	1,961.50	15	AQEU
Genmab A/S	30/04/2024	1:57:22 PM	1,961.50	8	TQEX
Genmab A/S	30/04/2024	1:59:01 PM	1,960.00	38	XCSE
Genmab A/S	30/04/2024	1:59:01 PM	1,960.00	39	XCSE
Genmab A/S	30/04/2024	1:59:01 PM	1,960.00	12	CEUX
Genmab A/S	30/04/2024	1:59:01 PM	1,960.00	25	CEUX
Genmab A/S	30/04/2024	2:06:49 PM	1,960.50	26	CEUX
Genmab A/S	30/04/2024	2:06:49 PM	1,960.50	11	CEUX
Genmab A/S	30/04/2024	2:06:49 PM	1,960.50	38	AQEU
Genmab A/S	30/04/2024	2:08:52 PM	1,959.00	1	XCSE
Genmab A/S	30/04/2024	2:11:14 PM	1,960.50	8	AQEU
Genmab A/S	30/04/2024	2:11:14 PM	1,960.50	15	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	2:12:08 PM	1,959.00	31	CEUX
Genmab A/S	30/04/2024	2:12:08 PM	1,959.00	38	CEUX
Genmab A/S	30/04/2024	2:12:08 PM	1,958.50	35	AQEU
Genmab A/S	30/04/2024	2:12:09 PM	1,958.00	37	CEUX
Genmab A/S	30/04/2024	2:12:09 PM	1,958.00	37	XCSE
Genmab A/S	30/04/2024	2:21:17 PM	1,956.50	37	XCSE
Genmab A/S	30/04/2024	2:21:17 PM	1,955.50	37	CEUX
Genmab A/S	30/04/2024	2:21:24 PM	1,955.00	7	CEUX
Genmab A/S	30/04/2024	2:25:38 PM	1,956.50	45	XCSE
Genmab A/S	30/04/2024	2:28:52 PM	1,955.00	6	CEUX
Genmab A/S	30/04/2024	2:28:52 PM	1,955.00	38	CEUX
Genmab A/S	30/04/2024	2:31:12 PM	1,953.50	44	CEUX
Genmab A/S	30/04/2024	2:31:14 PM	1,953.00	41	XCSE
Genmab A/S	30/04/2024	2:35:22 PM	1,949.50	46	XCSE
Genmab A/S	30/04/2024	2:35:22 PM	1,950.00	46	XCSE
Genmab A/S	30/04/2024	2:35:22 PM	1,949.00	42	XCSE
Genmab A/S	30/04/2024	2:36:19 PM	1,946.00	48	TQEX
Genmab A/S	30/04/2024	2:47:00 PM	1,944.00	49	XCSE
Genmab A/S	30/04/2024	2:48:24 PM	1,944.00	4	XCSE
Genmab A/S	30/04/2024	2:49:05 PM	1,944.50	38	XCSE
Genmab A/S	30/04/2024	2:50:39 PM	1,946.00	51	XCSE
Genmab A/S	30/04/2024	2:53:38 PM	1,946.00	35	CEUX
Genmab A/S	30/04/2024	2:53:38 PM	1,945.50	61	CEUX
Genmab A/S	30/04/2024	2:53:42 PM	1,943.00	33	TQEX
Genmab A/S	30/04/2024	2:53:42 PM	1,943.00	13	TQEX
Genmab A/S	30/04/2024	2:53:42 PM	1,943.00	1	TQEX
Genmab A/S	30/04/2024	3:00:03 PM	1,941.50	48	AQEU
Genmab A/S	30/04/2024	3:03:29 PM	1,948.00	47	XCSE
Genmab A/S	30/04/2024	3:03:29 PM	1,948.00	5	XCSE
Genmab A/S	30/04/2024	3:04:58 PM	1,948.50	15	CEUX
Genmab A/S	30/04/2024	3:04:58 PM	1,948.50	9	CEUX
Genmab A/S	30/04/2024	3:04:58 PM	1,948.50	9	CEUX
Genmab A/S	30/04/2024	3:04:58 PM	1,948.50	15	CEUX
Genmab A/S	30/04/2024	3:04:58 PM	1,948.50	11	CEUX
Genmab A/S	30/04/2024	3:04:58 PM	1,948.50	1	CEUX
Genmab A/S	30/04/2024	3:07:41 PM	1,949.50	50	XCSE
Genmab A/S	30/04/2024	3:10:50 PM	1,952.50	5	XCSE
Genmab A/S	30/04/2024	3:10:50 PM	1,952.50	54	XCSE
Genmab A/S	30/04/2024	3:12:50 PM	1,951.50	31	AQEU
Genmab A/S	30/04/2024	3:12:50 PM	1,951.50	15	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	3:14:25 PM	1,952.50	51	XCSE
Genmab A/S	30/04/2024	3:16:57 PM	1,951.00	41	AQEU
Genmab A/S	30/04/2024	3:18:38 PM	1,951.00	24	XCSE
Genmab A/S	30/04/2024	3:18:38 PM	1,951.00	34	XCSE
Genmab A/S	30/04/2024	3:20:55 PM	1,947.00	26	AQEU
Genmab A/S	30/04/2024	3:23:01 PM	1,947.00	35	AQEU
Genmab A/S	30/04/2024	3:23:01 PM	1,947.00	16	AQEU
Genmab A/S	30/04/2024	3:24:37 PM	1,948.00	61	CEUX
Genmab A/S	30/04/2024	3:25:33 PM	1,946.00	60	TQEX
Genmab A/S	30/04/2024	3:27:40 PM	1,941.50	28	XCSE
Genmab A/S	30/04/2024	3:27:40 PM	1,941.50	34	XCSE
Genmab A/S	30/04/2024	3:27:40 PM	1,940.50	17	XCSE
Genmab A/S	30/04/2024	3:27:40 PM	1,940.50	42	XCSE
Genmab A/S	30/04/2024	3:27:40 PM	1,940.00	17	XCSE
Genmab A/S	30/04/2024	3:27:40 PM	1,940.00	51	XCSE
Genmab A/S	30/04/2024	3:37:03 PM	1,945.00	25	XCSE
Genmab A/S	30/04/2024	3:37:03 PM	1,945.00	25	XCSE
Genmab A/S	30/04/2024	3:37:03 PM	1,945.00	17	XCSE
Genmab A/S	30/04/2024	3:37:48 PM	1,944.50	69	TQEX
Genmab A/S	30/04/2024	3:39:46 PM	1,945.50	3	XCSE
Genmab A/S	30/04/2024	3:39:46 PM	1,945.50	75	XCSE
Genmab A/S	30/04/2024	3:41:49 PM	1,942.50	67	XCSE
Genmab A/S	30/04/2024	3:44:20 PM	1,945.50	25	XCSE
Genmab A/S	30/04/2024	3:44:20 PM	1,945.50	15	XCSE
Genmab A/S	30/04/2024	3:46:23 PM	1,947.50	43	XCSE
Genmab A/S	30/04/2024	3:47:11 PM	1,947.00	25	CEUX
Genmab A/S	30/04/2024	3:47:11 PM	1,947.00	14	CEUX
Genmab A/S	30/04/2024	3:47:11 PM	1,947.00	25	CEUX
Genmab A/S	30/04/2024	3:47:11 PM	1,947.00	10	CEUX
Genmab A/S	30/04/2024	3:49:25 PM	1,953.00	60	TQEX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	16	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	16	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	22	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	16	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	13	AQEU
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	18	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	4	CEUX
Genmab A/S	30/04/2024	3:50:15 PM	1,955.00	3	CEUX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	44	XCSE
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	20	XCSE
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	5	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	19	CEUX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	12	CEUX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	7	CEUX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	2	AQEU
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	2	AQEU
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	5	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	5	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	1	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	5	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	5	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	3	CEUX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	2	AQEU
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	7	AQEU
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	5	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	1	TQEX
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	20	XCSE
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	2	XCSE
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	13	XCSE
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	8	AQEU
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	10	AQEU
Genmab A/S	30/04/2024	3:52:22 PM	1,953.50	7	AQEU
Genmab A/S	30/04/2024	3:56:38 PM	1,951.00	61	CEUX
Genmab A/S	30/04/2024	3:56:38 PM	1,951.00	9	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	3:56:38 PM	1,951.00	10	TQEX
Genmab A/S	30/04/2024	3:56:38 PM	1,951.00	69	XCSE
Genmab A/S	30/04/2024	3:59:14 PM	1,954.50	4	AQEU
Genmab A/S	30/04/2024	3:59:16 PM	1,954.50	15	AQEU
Genmab A/S	30/04/2024	3:59:25 PM	1,954.50	15	AQEU
Genmab A/S	30/04/2024	3:59:36 PM	1,954.50	15	AQEU
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	20	XCSE
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	5	XCSE
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	24	CEUX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	24	CEUX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	17	CEUX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	20	CEUX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	4	AQEU
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	15	AQEU
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	4	AQEU
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	15	AQEU
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	3	AQEU
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	5	TQEX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	2	TQEX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	5	TQEX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	25	TQEX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	5	TQEX
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	25	XCSE
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	10	XCSE
Genmab A/S	30/04/2024	3:59:45 PM	1,953.00	25	XCSE
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	18	CEUX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	5	TQEX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	5	TQEX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	18	CEUX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	18	CEUX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	18	CEUX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	1	CEUX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	5	TQEX
Genmab A/S	30/04/2024	4:02:06 PM	1,957.00	9	TQEX
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	23	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	23	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	23	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	23	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	13	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	10	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	13	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	10	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	10	XCSE
Genmab A/S	30/04/2024	4:02:16 PM	1,957.00	1	CEUX
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	19	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	5	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	24	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	24	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	13	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	11	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	24	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	15	XCSE
Genmab A/S	30/04/2024	4:03:09 PM	1,957.00	4	XCSE
Genmab A/S	30/04/2024	4:05:19 PM	1,957.50	58	XCSE
Genmab A/S	30/04/2024	4:05:19 PM	1,957.50	52	CEUX
Genmab A/S	30/04/2024	4:05:19 PM	1,957.50	8	TQEX
Genmab A/S	30/04/2024	4:05:19 PM	1,957.50	8	XCSE
Genmab A/S	30/04/2024	4:05:50 PM	1,960.00	24	XCSE
Genmab A/S	30/04/2024	4:05:50 PM	1,960.00	24	XCSE
Genmab A/S	30/04/2024	4:05:50 PM	1,960.00	69	XCSE
Genmab A/S	30/04/2024	4:07:11 PM	1,963.50	60	XCSE
Genmab A/S	30/04/2024	4:07:11 PM	1,963.50	60	XCSE
Genmab A/S	30/04/2024	4:07:11 PM	1,963.50	2	XCSE
Genmab A/S	30/04/2024	4:08:08 PM	1,963.50	27	CEUX
Genmab A/S	30/04/2024	4:08:08 PM	1,963.50	20	CEUX
Genmab A/S	30/04/2024	4:08:08 PM	1,963.50	7	AQEU
Genmab A/S	30/04/2024	4:08:08 PM	1,963.50	7	TQEX
Genmab A/S	30/04/2024	4:08:08 PM	1,963.50	52	XCSE
Genmab A/S	30/04/2024	4:09:21 PM	1,962.00	14	XCSE
Genmab A/S	30/04/2024	4:09:21 PM	1,962.00	12	XCSE
Genmab A/S	30/04/2024	4:09:21 PM	1,962.00	26	XCSE
Genmab A/S	30/04/2024	4:09:21 PM	1,962.00	26	XCSE
Genmab A/S	30/04/2024	4:09:22 PM	1,962.00	26	XCSE
Genmab A/S	30/04/2024	4:09:22 PM	1,962.00	54	XCSE
Genmab A/S	30/04/2024	4:10:04 PM	1,961.00	43	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	8	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	17	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	17	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	17	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	8	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	9	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	25	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	25	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	12	XCSE
Genmab A/S	30/04/2024	4:12:43 PM	1,965.00	4	XCSE
Genmab A/S	30/04/2024	4:12:50 PM	1,965.00	44	XCSE
Genmab A/S	30/04/2024	4:12:50 PM	1,965.00	33	XCSE
Genmab A/S	30/04/2024	4:12:50 PM	1,965.00	11	XCSE
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	10	CEUX
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	10	CEUX
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	5	TQEX
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	6	XCSE
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	4	XCSE
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	10	XCSE
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	5	TQEX
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	10	CEUX
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	10	XCSE
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	10	XCSE
Genmab A/S	30/04/2024	4:13:47 PM	1,965.00	27	CEUX
Genmab A/S	30/04/2024	4:13:48 PM	1,965.00	17	CEUX
Genmab A/S	30/04/2024	4:14:51 PM	1,967.00	47	CEUX
Genmab A/S	30/04/2024	4:14:51 PM	1,967.00	7	AQEU
Genmab A/S	30/04/2024	4:14:51 PM	1,967.00	7	TQEX
Genmab A/S	30/04/2024	4:14:51 PM	1,967.00	51	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	25	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	24	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	23	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	1	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	16	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	8	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	24	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	24	XCSE
Genmab A/S	30/04/2024	4:15:53 PM	1,967.00	16	XCSE
Genmab A/S	30/04/2024	4:15:54 PM	1,966.00	48	XCSE
Genmab A/S	30/04/2024	4:17:17 PM	1,963.50	57	XCSE
Genmab A/S	30/04/2024	4:17:51 PM	1,963.00	25	XCSE
Genmab A/S	30/04/2024	4:17:51 PM	1,963.00	35	XCSE
Genmab A/S	30/04/2024	4:17:51 PM	1,963.00	25	XCSE
Genmab A/S	30/04/2024	4:17:51 PM	1,963.00	21	XCSE
Genmab A/S	30/04/2024	4:17:51 PM	1,963.00	25	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	4:17:51 PM	1,963.00	1	XCSE
Genmab A/S	30/04/2024	4:19:13 PM	1,964.00	52	CEUX
Genmab A/S	30/04/2024	4:19:13 PM	1,964.00	8	AQEU
Genmab A/S	30/04/2024	4:19:13 PM	1,964.00	8	TQEX
Genmab A/S	30/04/2024	4:19:13 PM	1,964.00	10	XCSE
Genmab A/S	30/04/2024	4:19:13 PM	1,964.00	47	XCSE
Genmab A/S	30/04/2024	4:20:36 PM	1,969.50	55	XCSE
Genmab A/S	30/04/2024	4:20:36 PM	1,969.50	18	CEUX
Genmab A/S	30/04/2024	4:20:36 PM	1,969.50	31	CEUX
Genmab A/S	30/04/2024	4:20:36 PM	1,969.50	5	TQEX
Genmab A/S	30/04/2024	4:20:36 PM	1,969.50	10	CEUX
Genmab A/S	30/04/2024	4:21:23 PM	1,970.00	22	XCSE
Genmab A/S	30/04/2024	4:21:23 PM	1,970.00	6	XCSE
Genmab A/S	30/04/2024	4:21:23 PM	1,970.00	16	XCSE
Genmab A/S	30/04/2024	4:21:23 PM	1,970.00	3	XCSE
Genmab A/S	30/04/2024	4:21:38 PM	1,970.00	11	CEUX
Genmab A/S	30/04/2024	4:21:38 PM	1,970.00	11	CEUX
Genmab A/S	30/04/2024	4:21:38 PM	1,970.00	22	CEUX
Genmab A/S	30/04/2024	4:21:39 PM	1,970.00	22	CEUX
Genmab A/S	30/04/2024	4:21:39 PM	1,970.00	16	CEUX
Genmab A/S	30/04/2024	4:22:40 PM	1,973.50	23	XCSE
Genmab A/S	30/04/2024	4:22:40 PM	1,973.50	38	XCSE
Genmab A/S	30/04/2024	4:22:40 PM	1,973.50	23	XCSE
Genmab A/S	30/04/2024	4:22:40 PM	1,973.50	35	XCSE
Genmab A/S	30/04/2024	4:23:58 PM	1,973.00	57	XCSE
Genmab A/S	30/04/2024	4:23:58 PM	1,973.00	52	CEUX
Genmab A/S	30/04/2024	4:23:58 PM	1,973.00	8	AQEU
Genmab A/S	30/04/2024	4:23:58 PM	1,973.00	8	TQEX
Genmab A/S	30/04/2024	4:24:36 PM	1,969.00	58	XCSE
Genmab A/S	30/04/2024	4:24:36 PM	1,969.00	52	CEUX
Genmab A/S	30/04/2024	4:24:36 PM	1,969.00	6	AQEU
Genmab A/S	30/04/2024	4:24:36 PM	1,969.00	2	AQEU
Genmab A/S	30/04/2024	4:24:36 PM	1,969.00	8	TQEX
Genmab A/S	30/04/2024	4:26:22 PM	1,966.50	24	XCSE
Genmab A/S	30/04/2024	4:26:22 PM	1,966.50	43	XCSE
Genmab A/S	30/04/2024	4:26:22 PM	1,966.50	43	XCSE
Genmab A/S	30/04/2024	4:26:22 PM	1,966.50	24	XCSE
Genmab A/S	30/04/2024	4:26:22 PM	1,966.50	2	XCSE
Genmab A/S	30/04/2024	4:26:57 PM	1,967.00	25	XCSE
Genmab A/S	30/04/2024	4:26:57 PM	1,967.00	25	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	4:26:57 PM	1,967.00	25	XCSE
Genmab A/S	30/04/2024	4:26:57 PM	1,967.00	8	XCSE
Genmab A/S	30/04/2024	4:26:57 PM	1,967.00	25	XCSE
Genmab A/S	30/04/2024	4:26:57 PM	1,967.00	20	XCSE
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	7	XCSE
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	7	XCSE
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	11	XCSE
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	1	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	5	TQEX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	1	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	1	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	5	TQEX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	5	TQEX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	5	TQEX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	8	CEUX
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	7	XCSE
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	49	XCSE
Genmab A/S	30/04/2024	4:29:34 PM	1,967.00	2	XCSE
Genmab A/S	30/04/2024	4:29:35 PM	1,967.00	21	TQEX
Genmab A/S	30/04/2024	4:29:35 PM	1,967.00	21	TQEX
Genmab A/S	30/04/2024	4:30:23 PM	1,968.50	8	XCSE
Genmab A/S	30/04/2024	4:30:23 PM	1,968.50	5	TQEX
Genmab A/S	30/04/2024	4:30:23 PM	1,968.50	8	CEUX
Genmab A/S	30/04/2024	4:30:23 PM	1,968.50	8	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,968.50	21	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,968.50	13	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,968.50	21	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,968.50	21	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,968.50	21	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,968.50	6	XCSE
Genmab A/S	30/04/2024	4:30:36 PM	1,966.50	17	XCSE
Genmab A/S	30/04/2024	4:31:36 PM	1,966.00	19	XCSE
Genmab A/S	30/04/2024	4:31:36 PM	1,966.00	51	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	30/04/2024	4:31:36 PM	1,966.00	8	AQEU
Genmab A/S	30/04/2024	4:31:36 PM	1,966.00	8	TQEX
Genmab A/S	30/04/2024	4:31:36 PM	1,966.00	29	CEUX
Genmab A/S	30/04/2024	4:32:11 PM	1,966.00	36	CEUX
Genmab A/S	30/04/2024	4:32:11 PM	1,966.00	24	CEUX
Genmab A/S	30/04/2024	4:32:11 PM	1,966.00	9	AQEU
Genmab A/S	30/04/2024	4:32:11 PM	1,966.00	9	TQEX
Genmab A/S	30/04/2024	4:32:11 PM	1,966.00	3	XCSE
Genmab A/S	30/04/2024	4:32:11 PM	1,966.00	63	XCSE
Genmab A/S	30/04/2024	4:35:13 PM	1,964.00	11	XCSE
Genmab A/S	30/04/2024	4:35:13 PM	1,964.00	44	XCSE
Genmab A/S	30/04/2024	4:37:18 PM	1,961.00	63	CEUX
Genmab A/S	30/04/2024	4:37:54 PM	1,959.50	58	TQEX
Genmab A/S	30/04/2024	4:40:26 PM	1,960.00	74	CEUX
Genmab A/S	30/04/2024	4:40:26 PM	1,960.00	24	XCSE
Genmab A/S	30/04/2024	4:40:26 PM	1,960.00	51	XCSE
Genmab A/S	30/04/2024	4:43:20 PM	1,961.00	65	CEUX
Genmab A/S	30/04/2024	4:43:20 PM	1,961.00	65	XCSE
Genmab A/S	30/04/2024	4:43:20 PM	1,961.00	1	XCSE
Genmab A/S	30/04/2024	4:44:08 PM	1,959.50	60	CEUX
Genmab A/S	30/04/2024	4:45:09 PM	1,961.50	11	XCSE
Genmab A/S	30/04/2024	4:46:18 PM	1,962.00	9	TQEX
Genmab A/S	30/04/2024	4:46:18 PM	1,962.00	41	XCSE
Genmab A/S	30/04/2024	4:46:18 PM	1,962.00	60	CEUX
Genmab A/S	30/04/2024	4:46:18 PM	1,962.00	9	AQEU
Genmab A/S	30/04/2024	4:46:18 PM	1,962.00	26	XCSE
Genmab A/S	30/04/2024	4:47:42 PM	1,959.00	51	AQEU
Genmab A/S	30/04/2024	4:47:42 PM	1,959.00	43	XCSE
Genmab A/S	30/04/2024	4:47:42 PM	1,959.00	8	XCSE
Genmab A/S	30/04/2024	4:48:22 PM	1,959.50	51	CEUX
Genmab A/S	30/04/2024	4:51:20 PM	1,960.00	85	XCSE
Genmab A/S	30/04/2024	4:51:20 PM	1,960.00	37	XCSE
Genmab A/S	30/04/2024	4:51:20 PM	1,960.00	35	CEUX
Genmab A/S	30/04/2024	4:51:20 PM	1,960.00	56	AQEU
Genmab A/S	30/04/2024	4:52:20 PM	1,960.00	2	CEUX
Genmab A/S	30/04/2024	4:52:32 PM	1,960.00	7	CEUX
Genmab A/S	30/04/2024	4:53:09 PM	1,960.50	82	CEUX
Genmab A/S	01/05/2024	9:00:18 AM	1,950.00	4	XCSE
Genmab A/S	01/05/2024	9:00:18 AM	1,950.00	56	XCSE
Genmab A/S	01/05/2024	9:00:19 AM	1,949.50	1	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	2	XCSE
Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	9	XCSE
Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	33	XCSE
Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	9	XCSE
Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	33	XCSE
Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	11	XCSE
Genmab A/S	01/05/2024	9:03:09 AM	1,951.50	4	XCSE
Genmab A/S	01/05/2024	9:06:47 AM	1,954.50	24	XCSE
Genmab A/S	01/05/2024	9:06:47 AM	1,954.50	24	XCSE
Genmab A/S	01/05/2024	9:06:47 AM	1,954.50	14	XCSE
Genmab A/S	01/05/2024	9:07:54 AM	1,956.00	54	XCSE
Genmab A/S	01/05/2024	9:07:54 AM	1,956.00	15	XCSE
Genmab A/S	01/05/2024	9:08:57 AM	1,960.00	66	CEUX
Genmab A/S	01/05/2024	9:11:23 AM	1,957.00	26	XCSE
Genmab A/S	01/05/2024	9:11:25 AM	1,957.00	22	XCSE
Genmab A/S	01/05/2024	9:11:31 AM	1,957.00	14	AQEU
Genmab A/S	01/05/2024	9:14:33 AM	1,956.00	36	XCSE
Genmab A/S	01/05/2024	9:14:34 AM	1,954.00	17	CEUX
Genmab A/S	01/05/2024	9:18:17 AM	1,956.00	81	XCSE
Genmab A/S	01/05/2024	9:18:17 AM	1,956.00	70	XCSE
Genmab A/S	01/05/2024	9:18:17 AM	1,956.00	81	XCSE
Genmab A/S	01/05/2024	9:18:17 AM	1,956.00	15	XCSE
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	7	CEUX
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	19	CEUX
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	19	CEUX
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	6	CEUX
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	39	XCSE
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	1	CEUX
Genmab A/S	01/05/2024	9:23:39 AM	1,955.50	23	CEUX
Genmab A/S	01/05/2024	9:27:25 AM	1,952.00	64	XCSE
Genmab A/S	01/05/2024	9:33:45 AM	1,948.00	41	XCSE
Genmab A/S	01/05/2024	9:35:32 AM	1,945.00	23	CEUX
Genmab A/S	01/05/2024	9:35:32 AM	1,945.00	30	CEUX
Genmab A/S	01/05/2024	9:36:44 AM	1,941.50	77	XCSE
Genmab A/S	01/05/2024	9:40:39 AM	1,940.50	44	CEUX
Genmab A/S	01/05/2024	9:44:01 AM	1,940.00	40	XCSE
Genmab A/S	01/05/2024	9:44:01 AM	1,940.00	5	XCSE
Genmab A/S	01/05/2024	9:46:47 AM	1,938.50	26	XCSE
Genmab A/S	01/05/2024	9:46:47 AM	1,938.50	1	XCSE
Genmab A/S	01/05/2024	9:46:47 AM	1,938.50	17	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	9:46:49 AM	1,938.00	49	CEUX
Genmab A/S	01/05/2024	9:46:49 AM	1,937.50	10	CEUX
Genmab A/S	01/05/2024	9:46:49 AM	1,937.50	2	CEUX
Genmab A/S	01/05/2024	9:46:49 AM	1,937.50	26	XCSE
Genmab A/S	01/05/2024	9:51:45 AM	1,936.00	50	CEUX
Genmab A/S	01/05/2024	9:52:02 AM	1,935.00	50	XCSE
Genmab A/S	01/05/2024	9:53:30 AM	1,933.00	37	CEUX
Genmab A/S	01/05/2024	9:53:30 AM	1,932.50	54	XCSE
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	XCSE
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	XCSE
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	62	XCSE
Genmab A/S	01/05/2024	10:00:40 AM	1,938.50	41	XCSE
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	5	TQEX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	5	TQEX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	7	TQEX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	6	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	5	TQEX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	5	TQEX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	8	CEUX
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	21	XCSE
Genmab A/S	01/05/2024	10:00:40 AM	1,937.50	13	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.50	42	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.50	42	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.00	48	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.00	43	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.00	22	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.50	14	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.00	26	XCSE
Genmab A/S	01/05/2024	10:00:41 AM	1,936.00	15	XCSE
Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	12	CEUX
Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	12	CEUX
Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	12	CEUX
Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	9	CEUX
Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	13	XCSE
Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	1	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	10:09:46 AM	1,935.00	13	XCSE
Genmab A/S	01/05/2024	10:10:04 AM	1,935.00	7	CEUX
Genmab A/S	01/05/2024	10:10:13 AM	1,935.00	11	CEUX
Genmab A/S	01/05/2024	10:10:13 AM	1,935.00	5	CEUX
Genmab A/S	01/05/2024	10:10:13 AM	1,935.00	23	CEUX
Genmab A/S	01/05/2024	10:12:26 AM	1,934.50	4	CEUX
Genmab A/S	01/05/2024	10:12:26 AM	1,934.50	8	CEUX
Genmab A/S	01/05/2024	10:12:26 AM	1,934.50	13	XCSE
Genmab A/S	01/05/2024	10:12:27 AM	1,934.50	25	XCSE
Genmab A/S	01/05/2024	10:12:27 AM	1,934.50	17	XCSE
Genmab A/S	01/05/2024	10:12:27 AM	1,934.50	25	XCSE
Genmab A/S	01/05/2024	10:12:27 AM	1,934.50	25	XCSE
Genmab A/S	01/05/2024	10:16:27 AM	1,940.00	36	CEUX
Genmab A/S	01/05/2024	10:16:27 AM	1,939.00	21	CEUX
Genmab A/S	01/05/2024	10:16:27 AM	1,939.00	21	CEUX
Genmab A/S	01/05/2024	10:16:27 AM	1,939.00	21	CEUX
Genmab A/S	01/05/2024	10:16:27 AM	1,939.00	17	CEUX
Genmab A/S	01/05/2024	10:16:27 AM	1,939.00	37	TQEX
Genmab A/S	01/05/2024	10:16:27 AM	1,939.00	5	TQEX
Genmab A/S	01/05/2024	10:18:04 AM	1,939.00	45	XCSE
Genmab A/S	01/05/2024	10:18:04 AM	1,939.00	39	CEUX
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	24	CEUX
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	5	TQEX
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	25	XCSE
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	25	XCSE
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	12	XCSE
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	25	XCSE
Genmab A/S	01/05/2024	10:18:33 AM	1,934.50	24	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	27	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	27	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	10	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	17	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	10	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	27	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.50	5	XCSE
Genmab A/S	01/05/2024	10:24:02 AM	1,937.00	44	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,936.50	24	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,936.50	24	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,936.50	12	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,937.00	44	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	10:24:02 AM	1,937.00	4	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,936.50	24	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,936.50	4	CEUX
Genmab A/S	01/05/2024	10:24:02 AM	1,936.00	88	XCSE
Genmab A/S	01/05/2024	10:32:58 AM	1,932.50	21	TQEX
Genmab A/S	01/05/2024	10:33:35 AM	1,932.00	40	CEUX
Genmab A/S	01/05/2024	10:37:17 AM	1,934.50	2	AQEU
Genmab A/S	01/05/2024	10:39:02 AM	1,935.50	46	XCSE
Genmab A/S	01/05/2024	10:39:02 AM	1,935.50	52	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	16	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	23	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	23	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	23	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	23	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	23	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	14	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	21	CEUX
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	21	CEUX
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	21	CEUX
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	24	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,942.50	16	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	10	CEUX
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	10	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	3	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	3	CEUX
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	10	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	3	XCSE
Genmab A/S	01/05/2024	10:43:21 AM	1,941.50	13	CEUX
Genmab A/S	01/05/2024	10:43:22 AM	1,941.50	13	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	10:43:22 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:23 AM	1,941.50	13	CEUX
Genmab A/S	01/05/2024	10:43:23 AM	1,941.50	13	XCSE
Genmab A/S	01/05/2024	10:43:23 AM	1,941.50	4	XCSE
Genmab A/S	01/05/2024	10:43:23 AM	1,941.50	9	CEUX
Genmab A/S	01/05/2024	10:44:02 AM	1,938.50	87	XCSE
Genmab A/S	01/05/2024	10:52:27 AM	1,941.50	40	CEUX
Genmab A/S	01/05/2024	10:52:32 AM	1,940.50	34	AQEU
Genmab A/S	01/05/2024	10:52:32 AM	1,940.50	37	AQEU
Genmab A/S	01/05/2024	10:53:10 AM	1,940.00	15	AQEU
Genmab A/S	01/05/2024	10:54:04 AM	1,940.00	36	TQEX
Genmab A/S	01/05/2024	10:54:04 AM	1,940.00	24	TQEX
Genmab A/S	01/05/2024	10:57:20 AM	1,940.50	42	XCSE
Genmab A/S	01/05/2024	10:58:23 AM	1,940.50	34	XCSE
Genmab A/S	01/05/2024	10:59:09 AM	1,940.50	37	XCSE
Genmab A/S	01/05/2024	11:00:07 AM	1,940.50	40	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	23	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	17	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	6	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	17	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	23	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	1	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	23	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	23	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	23	XCSE
Genmab A/S	01/05/2024	11:00:20 AM	1,940.00	5	XCSE
Genmab A/S	01/05/2024	11:00:21 AM	1,939.00	22	XCSE
Genmab A/S	01/05/2024	11:00:21 AM	1,939.00	22	XCSE
Genmab A/S	01/05/2024	11:00:21 AM	1,939.00	22	XCSE
Genmab A/S	01/05/2024	11:00:21 AM	1,939.00	14	XCSE
Genmab A/S	01/05/2024	11:00:21 AM	1,938.50	84	XCSE
Genmab A/S	01/05/2024	11:07:19 AM	1,937.00	18	XCSE
Genmab A/S	01/05/2024	11:10:24 AM	1,938.00	41	TQEX
Genmab A/S	01/05/2024	11:10:59 AM	1,937.00	41	XCSE
Genmab A/S	01/05/2024	11:10:59 AM	1,937.00	63	XCSE
Genmab A/S	01/05/2024	11:10:59 AM	1,937.00	53	CEUX
Genmab A/S	01/05/2024	11:10:59 AM	1,937.00	8	TQEX
Genmab A/S	01/05/2024	11:12:27 AM	1,937.00	14	CEUX
Genmab A/S	01/05/2024	11:12:27 AM	1,937.00	12	CEUX
Genmab A/S	01/05/2024	11:16:31 AM	1,938.50	35	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	11:19:42 AM	1,939.00	6	XCSE
Genmab A/S	01/05/2024	11:19:42 AM	1,939.00	13	XCSE
Genmab A/S	01/05/2024	11:19:42 AM	1,939.00	72	CEUX
Genmab A/S	01/05/2024	11:20:08 AM	1,939.00	36	CEUX
Genmab A/S	01/05/2024	11:20:08 AM	1,939.00	4	XCSE
Genmab A/S	01/05/2024	11:21:09 AM	1,939.00	36	CEUX
Genmab A/S	01/05/2024	11:21:09 AM	1,939.00	5	XCSE
Genmab A/S	01/05/2024	11:23:23 AM	1,939.50	41	CEUX
Genmab A/S	01/05/2024	11:23:28 AM	1,939.50	36	CEUX
Genmab A/S	01/05/2024	11:23:28 AM	1,939.50	3	CEUX
Genmab A/S	01/05/2024	11:24:43 AM	1,940.00	36	CEUX
Genmab A/S	01/05/2024	11:25:28 AM	1,940.00	8	AQEU
Genmab A/S	01/05/2024	11:25:28 AM	1,940.00	8	TQEX
Genmab A/S	01/05/2024	11:26:02 AM	1,940.00	40	AQEU
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	2	CEUX
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	38	CEUX
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	37	CEUX
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	6	CEUX
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	6	AQEU
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	7	TQEX
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	40	XCSE
Genmab A/S	01/05/2024	11:26:02 AM	1,939.00	48	XCSE
Genmab A/S	01/05/2024	11:26:02 AM	1,938.50	50	XCSE
Genmab A/S	01/05/2024	11:26:02 AM	1,938.50	44	XCSE
Genmab A/S	01/05/2024	11:26:02 AM	1,938.50	6	XCSE
Genmab A/S	01/05/2024	11:26:02 AM	1,938.50	37	XCSE
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	37	CEUX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	31	CEUX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	31	CEUX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	17	CEUX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	5	TQEX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	2	TQEX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	3	TQEX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	5	TQEX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	13	TQEX
Genmab A/S	01/05/2024	11:37:14 AM	1,939.50	15	TQEX
Genmab A/S	01/05/2024	11:41:28 AM	1,940.00	39	CEUX
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	93	XCSE
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	14	CEUX
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	19	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	50	CEUX
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	12	AQEU
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	5	TQEX
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	18	TQEX
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	13	TQEX
Genmab A/S	01/05/2024	11:41:28 AM	1,939.50	13	TQEX
Genmab A/S	01/05/2024	11:49:58 AM	1,939.00	36	CEUX
Genmab A/S	01/05/2024	11:51:19 AM	1,940.00	42	CEUX
Genmab A/S	01/05/2024	11:51:19 AM	1,939.50	21	XCSE
Genmab A/S	01/05/2024	11:51:19 AM	1,939.50	39	XCSE
Genmab A/S	01/05/2024	11:51:19 AM	1,939.50	20	XCSE
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	30	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	75	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	30	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	2	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	34	AQEU
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	4	AQEU
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	4	AQEU
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	33	AQEU
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	TQEX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	13	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	CEUX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	TQEX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	TQEX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	TQEX
Genmab A/S	01/05/2024	11:56:04 AM	1,940.00	5	TQEX
Genmab A/S	01/05/2024	12:00:59 PM	1,937.00	24	CEUX
Genmab A/S	01/05/2024	12:00:59 PM	1,937.00	41	CEUX
Genmab A/S	01/05/2024	12:08:41 PM	1,940.00	8	AQEU
Genmab A/S	01/05/2024	12:08:52 PM	1,940.00	8	AQEU
Genmab A/S	01/05/2024	12:09:04 PM	1,940.00	8	AQEU
Genmab A/S	01/05/2024	12:09:20 PM	1,940.00	8	AQEU
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	9	CEUX
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	9	CEUX
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	9	CEUX
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	9	CEUX
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	1	CEUX
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	6	CEUX
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	2	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	2	AQEU
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	2	AQEU
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	10	XCSE
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	10	XCSE
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	10	XCSE
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	10	XCSE
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	7	XCSE
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	21	XCSE
Genmab A/S	01/05/2024	12:10:20 PM	1,938.50	14	XCSE
Genmab A/S	01/05/2024	12:11:20 PM	1,938.50	30	XCSE
Genmab A/S	01/05/2024	12:11:20 PM	1,938.50	5	XCSE
Genmab A/S	01/05/2024	12:11:20 PM	1,938.50	49	XCSE
Genmab A/S	01/05/2024	12:16:35 PM	1,938.50	13	CEUX
Genmab A/S	01/05/2024	12:16:35 PM	1,938.50	36	CEUX
Genmab A/S	01/05/2024	12:19:04 PM	1,939.00	50	CEUX
Genmab A/S	01/05/2024	12:19:04 PM	1,939.00	3	CEUX
Genmab A/S	01/05/2024	12:19:04 PM	1,939.00	51	CEUX
Genmab A/S	01/05/2024	12:28:05 PM	1,939.50	30	XCSE
Genmab A/S	01/05/2024	12:29:07 PM	1,939.50	30	XCSE
Genmab A/S	01/05/2024	12:29:07 PM	1,939.50	36	XCSE
Genmab A/S	01/05/2024	12:29:28 PM	1,939.00	7	CEUX
Genmab A/S	01/05/2024	12:29:28 PM	1,939.00	77	CEUX
Genmab A/S	01/05/2024	12:29:28 PM	1,939.00	13	TQEX
Genmab A/S	01/05/2024	12:29:28 PM	1,939.00	93	XCSE
Genmab A/S	01/05/2024	12:29:28 PM	1,939.00	8	AQEU
Genmab A/S	01/05/2024	12:29:28 PM	1,939.00	4	TQEX
Genmab A/S	01/05/2024	12:34:25 PM	1,937.50	18	CEUX
Genmab A/S	01/05/2024	12:35:54 PM	1,939.00	56	XCSE
Genmab A/S	01/05/2024	12:36:42 PM	1,939.00	53	CEUX
Genmab A/S	01/05/2024	12:36:42 PM	1,939.00	6	CEUX
Genmab A/S	01/05/2024	12:39:15 PM	1,939.00	58	XCSE
Genmab A/S	01/05/2024	12:42:57 PM	1,940.50	39	XCSE
Genmab A/S	01/05/2024	12:44:33 PM	1,940.50	34	CEUX
Genmab A/S	01/05/2024	12:48:47 PM	1,945.50	2	AQEU
Genmab A/S	01/05/2024	12:48:47 PM	1,945.50	5	TQEX
Genmab A/S	01/05/2024	12:48:53 PM	1,948.50	36	XCSE
Genmab A/S	01/05/2024	12:48:53 PM	1,948.50	45	XCSE
Genmab A/S	01/05/2024	12:48:53 PM	1,948.50	1	XCSE
Genmab A/S	01/05/2024	12:49:30 PM	1,948.50	38	XCSE
Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	22	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	22	XCSE
Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	22	XCSE
Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	22	XCSE
Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	22	XCSE
Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	22	XCSE
Genmab A/S	01/05/2024	12:50:27 PM	1,949.50	5	XCSE
Genmab A/S	01/05/2024	12:58:52 PM	1,954.50	38	XCSE
Genmab A/S	01/05/2024	12:58:52 PM	1,954.50	47	XCSE
Genmab A/S	01/05/2024	12:58:52 PM	1,954.50	23	XCSE
Genmab A/S	01/05/2024	12:58:52 PM	1,954.00	22	CEUX
Genmab A/S	01/05/2024	12:58:52 PM	1,954.00	43	CEUX
Genmab A/S	01/05/2024	12:58:52 PM	1,954.00	8	CEUX
Genmab A/S	01/05/2024	1:03:51 PM	1,957.00	30	XCSE
Genmab A/S	01/05/2024	1:03:51 PM	1,957.00	41	CEUX
Genmab A/S	01/05/2024	1:03:51 PM	1,957.00	11	XCSE
Genmab A/S	01/05/2024	1:09:29 PM	1,956.50	21	CEUX
Genmab A/S	01/05/2024	1:09:29 PM	1,956.50	70	CEUX
Genmab A/S	01/05/2024	1:09:29 PM	1,956.50	21	CEUX
Genmab A/S	01/05/2024	1:09:29 PM	1,956.50	21	CEUX
Genmab A/S	01/05/2024	1:09:29 PM	1,956.50	13	CEUX
Genmab A/S	01/05/2024	1:12:56 PM	1,956.50	8	AQEU
Genmab A/S	01/05/2024	1:13:24 PM	1,957.00	37	CEUX
Genmab A/S	01/05/2024	1:13:24 PM	1,956.50	25	XCSE
Genmab A/S	01/05/2024	1:13:24 PM	1,956.50	25	XCSE
Genmab A/S	01/05/2024	1:13:24 PM	1,956.50	16	XCSE
Genmab A/S	01/05/2024	1:13:24 PM	1,956.50	1	XCSE
Genmab A/S	01/05/2024	1:16:37 PM	1,956.00	23	XCSE
Genmab A/S	01/05/2024	1:16:37 PM	1,956.00	42	XCSE
Genmab A/S	01/05/2024	1:16:37 PM	1,956.00	9	XCSE
Genmab A/S	01/05/2024	1:17:01 PM	1,954.50	74	XCSE
Genmab A/S	01/05/2024	1:23:29 PM	1,957.50	28	AQEU
Genmab A/S	01/05/2024	1:23:29 PM	1,957.50	7	AQEU
Genmab A/S	01/05/2024	1:23:29 PM	1,957.50	4	AQEU
Genmab A/S	01/05/2024	1:23:29 PM	1,957.00	36	CEUX
Genmab A/S	01/05/2024	1:23:29 PM	1,957.00	26	CEUX
Genmab A/S	01/05/2024	1:31:00 PM	1,957.50	38	XCSE
Genmab A/S	01/05/2024	1:32:18 PM	1,958.00	42	XCSE
Genmab A/S	01/05/2024	1:32:18 PM	1,958.00	53	XCSE
Genmab A/S	01/05/2024	1:32:18 PM	1,958.00	42	XCSE
Genmab A/S	01/05/2024	1:32:18 PM	1,958.00	53	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	1:32:18 PM	1,958.00	18	XCSE
Genmab A/S	01/05/2024	1:36:12 PM	1,956.50	25	CEUX
Genmab A/S	01/05/2024	1:36:12 PM	1,956.50	25	CEUX
Genmab A/S	01/05/2024	1:36:12 PM	1,956.50	16	CEUX
Genmab A/S	01/05/2024	1:36:12 PM	1,956.50	10	CEUX
Genmab A/S	01/05/2024	1:36:12 PM	1,956.00	86	CEUX
Genmab A/S	01/05/2024	1:36:12 PM	1,956.00	56	CEUX
Genmab A/S	01/05/2024	1:43:46 PM	1,954.00	53	XCSE
Genmab A/S	01/05/2024	1:43:46 PM	1,954.00	3	XCSE
Genmab A/S	01/05/2024	1:43:46 PM	1,954.00	54	CEUX
Genmab A/S	01/05/2024	1:50:20 PM	1,958.00	56	XCSE
Genmab A/S	01/05/2024	1:50:20 PM	1,958.00	40	XCSE
Genmab A/S	01/05/2024	1:52:31 PM	1,957.00	56	XCSE
Genmab A/S	01/05/2024	1:52:31 PM	1,956.50	16	XCSE
Genmab A/S	01/05/2024	1:52:31 PM	1,956.50	38	XCSE
Genmab A/S	01/05/2024	1:52:33 PM	1,956.00	1	CEUX
Genmab A/S	01/05/2024	1:57:45 PM	1,956.50	53	XCSE
Genmab A/S	01/05/2024	1:57:45 PM	1,956.50	23	TQEX
Genmab A/S	01/05/2024	1:57:45 PM	1,956.50	23	TQEX
Genmab A/S	01/05/2024	1:57:45 PM	1,956.50	8	TQEX
Genmab A/S	01/05/2024	1:57:45 PM	1,956.50	11	TQEX
Genmab A/S	01/05/2024	2:05:33 PM	1,955.00	22	XCSE
Genmab A/S	01/05/2024	2:05:33 PM	1,955.00	22	XCSE
Genmab A/S	01/05/2024	2:05:33 PM	1,955.00	19	XCSE
Genmab A/S	01/05/2024	2:05:33 PM	1,955.00	3	XCSE
Genmab A/S	01/05/2024	2:12:28 PM	1,954.50	39	XCSE
Genmab A/S	01/05/2024	2:17:25 PM	1,954.00	7	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	9	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	6	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	4	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	18	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.50	3	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	23	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	23	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	26	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	22	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	22	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	3	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	5	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	50	AQEU
Genmab A/S	01/05/2024	2:18:39 PM	1,955.00	31	AQEU
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	18	XCSE
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	18	CEUX
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	5	TQEX
Genmab A/S	01/05/2024	2:18:39 PM	1,954.50	5	TQEX
Genmab A/S	01/05/2024	2:26:51 PM	1,957.50	30	XCSE
Genmab A/S	01/05/2024	2:26:51 PM	1,957.50	11	XCSE
Genmab A/S	01/05/2024	2:27:24 PM	1,957.50	40	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,957.50	12	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	1	AQEU
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	7	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	1	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	20	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	13	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	13	XCSE
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	2:27:57 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:30:17 PM	1,957.50	38	CEUX
Genmab A/S	01/05/2024	2:31:28 PM	1,957.50	12	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	28	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	2	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	38	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	44	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	26	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	14	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	44	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	14	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	12	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	44	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	26	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	2	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	3	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	37	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	14	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	10	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	12	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	26	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,957.50	4	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.50	46	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.50	10	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.50	36	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.50	19	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	18	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	18	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	3	CEUX
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	2	AQEU
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	18	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	43	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	35	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	5	XCSE
Genmab A/S	01/05/2024	2:31:42 PM	1,956.00	43	XCSE
Genmab A/S	01/05/2024	2:36:50 PM	1,956.50	36	XCSE
Genmab A/S	01/05/2024	2:36:50 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	2:36:50 PM	1,956.50	16	XCSE
Genmab A/S	01/05/2024	2:36:50 PM	1,956.50	28	XCSE
Genmab A/S	01/05/2024	2:36:50 PM	1,956.50	3	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	28	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	4	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	20	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	31	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	4	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	4	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	27	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	4	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	6	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	4	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	8	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	18	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	4	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	7	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	2	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	5	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	6	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	19	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	11	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	18	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	9	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	1	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	10	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	14	CEUX
Genmab A/S	01/05/2024	2:43:42 PM	1,957.50	12	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,957.50	7	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	23	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	23	XCSE
Genmab A/S	01/05/2024	2:43:42 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:43:42 PM	1,958.00	6	CEUX
Genmab A/S	01/05/2024	2:45:51 PM	1,957.00	21	XCSE
Genmab A/S	01/05/2024	2:45:51 PM	1,957.00	2	XCSE
Genmab A/S	01/05/2024	2:45:52 PM	1,957.00	21	CEUX
Genmab A/S	01/05/2024	2:45:52 PM	1,957.00	5	TQEX
Genmab A/S	01/05/2024	2:45:52 PM	1,957.00	21	CEUX
Genmab A/S	01/05/2024	2:45:52 PM	1,957.00	5	TQEX
Genmab A/S	01/05/2024	2:48:59 PM	1,958.50	8	AQEU
Genmab A/S	01/05/2024	2:49:01 PM	1,958.50	8	AQEU
Genmab A/S	01/05/2024	2:49:03 PM	1,958.50	8	AQEU
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	1	AQEU
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:50:32 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:33 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:33 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:50:33 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:50:33 PM	1,957.50	9	XCSE
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	3	AQEU
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	1	XCSE
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	22	XCSE
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	1	XCSE
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:52:15 PM	1,957.50	23	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	41	CEUX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	19	CEUX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	3	AQEU
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	6	AQEU
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	2	AQEU
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	23	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	38	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	20	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	23	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	41	CEUX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	19	CEUX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	3	AQEU
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	6	AQEU
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	2	AQEU
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	7	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	46	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	12	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	2:53:20 PM	1,957.50	23	XCSE
Genmab A/S	01/05/2024	2:53:23 PM	1,957.50	17	XCSE
Genmab A/S	01/05/2024	2:53:23 PM	1,957.50	29	XCSE
Genmab A/S	01/05/2024	2:53:23 PM	1,957.50	20	XCSE
Genmab A/S	01/05/2024	2:53:23 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	16	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	11	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	15	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	11	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	38	CEUX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	32	CEUX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	6	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	6	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	15	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	6	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	6	CEUX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	6	AQEU
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	6	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	40	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	2	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	3	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	3	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	18	CEUX
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	2	AQEU
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	2	TQEX
Genmab A/S	01/05/2024	2:53:28 PM	1,957.00	47	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	19	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	19	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	19	XCSE
Genmab A/S	01/05/2024	2:53:28 PM	1,956.50	3	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	19	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	9	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	18	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	2	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	36	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	8	AQEU
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	30	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.50	20	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	21	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	21	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	20	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	20	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	20	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	14	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	2	AQEU
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	36	CEUX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	21	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	15	XCSE
Genmab A/S	01/05/2024	2:53:29 PM	1,956.00	25	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	3	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	36	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	46	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	4	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	6	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	10	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	10	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	5	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	9	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	1	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	3	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	1	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	25	AQEU
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	1	AQEU
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	3	AQEU
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	3	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	5	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	24	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	10	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	3	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	AQEU
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	9	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	16	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	6	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	9	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	22	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	3	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	6	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	22	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	9	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	19	XCSE
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	36	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	13	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	AQEU
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	AQEU
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	8	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	7	TQEX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	24	CEUX
Genmab A/S	01/05/2024	3:07:07 PM	1,956.50	11	TQEX
Genmab A/S	01/05/2024	3:10:40 PM	1,956.50	39	CEUX
Genmab A/S	01/05/2024	3:10:40 PM	1,956.50	24	XCSE
Genmab A/S	01/05/2024	3:10:40 PM	1,956.50	24	XCSE
Genmab A/S	01/05/2024	3:10:52 PM	1,956.50	65	XCSE
Genmab A/S	01/05/2024	3:11:24 PM	1,956.50	65	XCSE
Genmab A/S	01/05/2024	3:11:24 PM	1,956.50	56	XCSE
Genmab A/S	01/05/2024	3:11:24 PM	1,956.50	22	XCSE
Genmab A/S	01/05/2024	3:11:24 PM	1,956.50	101	XCSE
Genmab A/S	01/05/2024	3:12:56 PM	1,955.50	74	XCSE
Genmab A/S	01/05/2024	3:12:56 PM	1,955.50	67	CEUX
Genmab A/S	01/05/2024	3:12:56 PM	1,955.50	10	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:12:56 PM	1,955.50	10	TQEX
Genmab A/S	01/05/2024	3:15:15 PM	1,953.50	2	XCSE
Genmab A/S	01/05/2024	3:17:15 PM	1,955.00	8	AQEU
Genmab A/S	01/05/2024	3:17:25 PM	1,955.50	36	CEUX
Genmab A/S	01/05/2024	3:17:43 PM	1,955.50	36	CEUX
Genmab A/S	01/05/2024	3:18:07 PM	1,955.50	36	CEUX
Genmab A/S	01/05/2024	3:18:07 PM	1,955.50	3	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.50	35	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	8	XCSE
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	3	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	3	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	1	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	1	AQEU
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	1	AQEU
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	1	TQEX
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	8	XCSE
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	3	XCSE
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	8	XCSE
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	3	XCSE
Genmab A/S	01/05/2024	3:18:41 PM	1,955.00	8	XCSE
Genmab A/S	01/05/2024	3:18:42 PM	1,955.00	8	XCSE
Genmab A/S	01/05/2024	3:18:42 PM	1,955.00	7	CEUX
Genmab A/S	01/05/2024	3:18:43 PM	1,955.00	2	CEUX
Genmab A/S	01/05/2024	3:18:43 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:18:43 PM	1,955.00	5	TQEX
Genmab A/S	01/05/2024	3:18:43 PM	1,955.00	8	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	54	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	25	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	7	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	25	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	25	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	4	AQEU
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	54	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	16	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	10	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	11	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	1	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	15	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	38	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	10	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	2	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	2	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	2	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	23	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	2	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	23	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	2	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	25	CEUX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	4	AQEU
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	4	AQEU
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	4	TQEX
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	16	XCSE
Genmab A/S	01/05/2024	3:22:21 PM	1,956.00	11	CEUX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	14	CEUX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	1	TQEX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	11	XCSE
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	24	CEUX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	4	AQEU
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	3	AQEU
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	3	TQEX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	4	AQEU
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	27	XCSE
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	16	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	5	TQEX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	4	TQEX
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	3	AQEU
Genmab A/S	01/05/2024	3:22:22 PM	1,955.50	36	XCSE
Genmab A/S	01/05/2024	3:22:22 PM	1,955.50	30	XCSE
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	36	XCSE
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	30	XCSE
Genmab A/S	01/05/2024	3:22:22 PM	1,956.00	6	XCSE
Genmab A/S	01/05/2024	3:28:52 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:28:52 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:28:59 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:10 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:10 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:18 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:18 PM	1,956.00	15	AQEU
Genmab A/S	01/05/2024	3:29:18 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:36 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:46 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:53 PM	1,956.00	8	AQEU
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	16	CEUX
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	9	CEUX
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	7	CEUX
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	16	CEUX
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:53 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:54 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:55 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:55 PM	1,955.00	16	CEUX
Genmab A/S	01/05/2024	3:29:55 PM	1,955.00	5	XCSE
Genmab A/S	01/05/2024	3:29:57 PM	1,955.00	13	XCSE
Genmab A/S	01/05/2024	3:29:57 PM	1,955.00	16	CEUX
Genmab A/S	01/05/2024	3:29:58 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:29:59 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:30:00 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:30:00 PM	1,955.00	18	XCSE
Genmab A/S	01/05/2024	3:30:00 PM	1,955.00	18	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:30:00 PM	1,955.00	16	XCSE
Genmab A/S	01/05/2024	3:30:00 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	16	CEUX
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	2	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	1	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	2	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	20	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	4	AQEU
Genmab A/S	01/05/2024	3:30:06 PM	1,955.00	3	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	21	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	20	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	21	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	20	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	2	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	3	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	2	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	3	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	2	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	3	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	21	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	1	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	19	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	1	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	4	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	2	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	21	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	22	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	21	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	21	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	23	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	18	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	3	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	10	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	6	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	23	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	45	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	20	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	20	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	20	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	10	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	3	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	5	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	43	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	21	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	13	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,954.00	31	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	20	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	11	CEUX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	2	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	4	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	8	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	8	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	30	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	21	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	15	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	24	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	16	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	5	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	5	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	16	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	11	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	14	XCSE
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	5	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,953.00	8	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,953.00	8	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	6	AQEU
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	8	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	3	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.50	1	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.00	8	TQEX
Genmab A/S	01/05/2024	3:30:16 PM	1,953.00	6	TQEX
Genmab A/S	01/05/2024	3:36:07 PM	1,957.50	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:36:07 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	3:36:07 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	3:36:07 PM	1,957.50	21	XCSE
Genmab A/S	01/05/2024	3:36:07 PM	1,957.50	7	XCSE
Genmab A/S	01/05/2024	3:36:09 PM	1,957.50	21	CEUX
Genmab A/S	01/05/2024	3:36:09 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	3:36:09 PM	1,957.50	14	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	7	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	43	XCSE
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	9	CEUX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	1	AQEU
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	5	TQEX
Genmab A/S	01/05/2024	3:38:00 PM	1,957.50	8	XCSE
Genmab A/S	01/05/2024	3:38:46 PM	1,959.00	24	XCSE
Genmab A/S	01/05/2024	3:38:46 PM	1,959.00	24	XCSE
Genmab A/S	01/05/2024	3:38:46 PM	1,959.00	24	XCSE
Genmab A/S	01/05/2024	3:38:47 PM	1,959.00	24	XCSE
Genmab A/S	01/05/2024	3:38:47 PM	1,959.00	15	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	5	TQEX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	TQEX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	5	TQEX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	3	TQEX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	22	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	5	TQEX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	CEUX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	1	AQEU
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	5	TQEX
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	2	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:39:31 PM	1,959.00	8	XCSE
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	3	XCSE
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	7	XCSE
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	10	CEUX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	5	TQEX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	5	TQEX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	14	TQEX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	5	TQEX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	10	CEUX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	10	CEUX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	1	AQEU
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	5	TQEX
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	10	XCSE
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	30	XCSE
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	10	XCSE
Genmab A/S	01/05/2024	3:42:49 PM	1,962.00	10	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	38	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	30	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	4	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	34	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	3	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	34	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	3	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	34	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	34	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	15	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	2	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	3	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	2	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	33	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	5	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	24	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	14	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	38	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	27	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,963.00	32	CEUX
Genmab A/S	01/05/2024	3:43:28 PM	1,961.00	3	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,961.00	3	AQEU
Genmab A/S	01/05/2024	3:43:28 PM	1,961.00	5	TQEX
Genmab A/S	01/05/2024	3:43:28 PM	1,961.00	22	XCSE
Genmab A/S	01/05/2024	3:43:28 PM	1,961.00	50	XCSE
Genmab A/S	01/05/2024	3:43:58 PM	1,959.50	12	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	47	XCSE
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	6	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	28	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	8	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	6	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	36	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	13	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	21	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	21	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	2	CEUX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	7	TQEX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	7	TQEX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	11	TQEX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	7	TQEX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	7	TQEX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	3	TQEX
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	47	XCSE
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	47	XCSE
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	15	XCSE
Genmab A/S	01/05/2024	3:46:48 PM	1,960.50	40	CEUX
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	17	CEUX
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	19	XCSE
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	5	TQEX
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	1	CEUX
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	5	TQEX
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	3	XCSE
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	16	XCSE
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	14	CEUX
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	2	AQEU
Genmab A/S	01/05/2024	3:47:02 PM	1,958.50	1	AQEU
Genmab A/S	01/05/2024	3:47:28 PM	1,955.50	18	CEUX
Genmab A/S	01/05/2024	3:47:28 PM	1,955.50	21	CEUX
Genmab A/S	01/05/2024	3:48:03 PM	1,953.50	14	CEUX
Genmab A/S	01/05/2024	3:48:03 PM	1,953.50	4	CEUX
Genmab A/S	01/05/2024	3:48:03 PM	1,953.50	2	XCSE
Genmab A/S	01/05/2024	3:48:03 PM	1,953.50	20	XCSE
Genmab A/S	01/05/2024	3:48:28 PM	1,952.00	13	CEUX
Genmab A/S	01/05/2024	3:48:28 PM	1,952.00	5	TQEX
Genmab A/S	01/05/2024	3:48:28 PM	1,952.00	12	XCSE
Genmab A/S	01/05/2024	3:51:55 PM	1,957.00	45	CEUX
Genmab A/S	01/05/2024	3:51:55 PM	1,957.00	45	CEUX
Genmab A/S	01/05/2024	3:51:57 PM	1,957.00	45	CEUX
Genmab A/S	01/05/2024	3:51:57 PM	1,957.00	45	CEUX
Genmab A/S	01/05/2024	3:51:57 PM	1,957.00	13	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:51:57 PM	1,957.00	32	CEUX
Genmab A/S	01/05/2024	3:51:57 PM	1,957.00	3	CEUX
Genmab A/S	01/05/2024	3:51:58 PM	1,957.00	1	CEUX
Genmab A/S	01/05/2024	3:51:58 PM	1,957.00	44	CEUX
Genmab A/S	01/05/2024	3:51:58 PM	1,957.00	10	CEUX
Genmab A/S	01/05/2024	3:51:58 PM	1,957.00	10	CEUX
Genmab A/S	01/05/2024	3:51:58 PM	1,957.00	25	CEUX
Genmab A/S	01/05/2024	3:52:02 PM	1,957.00	35	CEUX
Genmab A/S	01/05/2024	3:52:08 PM	1,957.00	36	CEUX
Genmab A/S	01/05/2024	3:52:26 PM	1,958.50	7	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.50	22	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.50	15	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	18	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	18	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	2	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	3	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	6	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	9	CEUX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:30 PM	1,958.00	5	TQEX
Genmab A/S	01/05/2024	3:52:34 PM	1,958.00	8	XCSE
Genmab A/S	01/05/2024	3:52:34 PM	1,958.00	36	XCSE
Genmab A/S	01/05/2024	3:53:56 PM	1,959.00	21	CEUX
Genmab A/S	01/05/2024	3:53:56 PM	1,959.00	5	TQEX
Genmab A/S	01/05/2024	3:53:56 PM	1,959.00	21	XCSE
Genmab A/S	01/05/2024	3:53:56 PM	1,959.00	21	CEUX
Genmab A/S	01/05/2024	3:53:56 PM	1,959.00	21	CEUX
Genmab A/S	01/05/2024	3:54:20 PM	1,959.50	8	CEUX
Genmab A/S	01/05/2024	3:54:20 PM	1,959.50	59	CEUX
Genmab A/S	01/05/2024	3:55:33 PM	1,959.00	22	CEUX
Genmab A/S	01/05/2024	3:55:33 PM	1,959.00	9	CEUX
Genmab A/S	01/05/2024	3:55:33 PM	1,959.00	35	XCSE
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	9	CEUX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	24	CEUX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	4	CEUX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	4	TQEX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	36	XCSE
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	29	CEUX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	4	CEUX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	2	TQEX
Genmab A/S	01/05/2024	3:56:01 PM	1,961.50	4	TQEX
Genmab A/S	01/05/2024	3:56:28 PM	1,961.50	20	CEUX
Genmab A/S	01/05/2024	3:56:28 PM	1,961.50	23	XCSE
Genmab A/S	01/05/2024	3:56:28 PM	1,961.50	13	XCSE
Genmab A/S	01/05/2024	3:57:41 PM	1,962.50	23	TQEX
Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	17	CEUX
Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	7	AQEU
Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	29	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	5	AQEU
Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	29	CEUX
Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	5	TQEX
Genmab A/S	01/05/2024	3:57:45 PM	1,962.50	31	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	67	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	74	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	1	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	7	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	7	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	1	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	1	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	6	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	3	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	XCSE
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	CEUX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	1	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	3:58:41 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	4	CEUX
Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	1	AQEU
Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	1	AQEU
Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	4	CEUX
Genmab A/S	01/05/2024	4:00:07 PM	1,964.50	1	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	4	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	1	AQEU
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	1	AQEU
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	2	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	3	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	3	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	4	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	8	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	6	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	3	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	9	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	4	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	4	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	8	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	6	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	4	CEUX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	2	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	1	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	2	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	2	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	4	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	1	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	1	TQEX
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	12	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	1	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	11	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	23	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	24	XCSE
Genmab A/S	01/05/2024	4:00:12 PM	1,964.50	23	XCSE
Genmab A/S	01/05/2024	4:00:15 PM	1,964.50	13	XCSE
Genmab A/S	01/05/2024	4:00:52 PM	1,965.50	9	CEUX
Genmab A/S	01/05/2024	4:01:54 PM	1,965.00	4	AQEU
Genmab A/S	01/05/2024	4:01:54 PM	1,965.00	10	AQEU
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	37	XCSE
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	12	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	22	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	22	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	5	AQEU
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	5	AQEU
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	37	XCSE
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	37	XCSE
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	16	XCSE
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	12	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	12	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	22	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	15	CEUX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	8	AQEU

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	14	AQEU
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	8	AQEU
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	8	TQEX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	7	TQEX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	2	TQEX
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	7	AQEU
Genmab A/S	01/05/2024	4:02:07 PM	1,964.50	8	TQEX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	25	CEUX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	25	CEUX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	25	CEUX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	26	XCSE
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	26	XCSE
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	4	AQEU
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	26	XCSE
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	18	XCSE
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	13	CEUX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	36	CEUX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	5	TQEX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	8	AQEU
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	8	TQEX
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	7	XCSE
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	7	XCSE
Genmab A/S	01/05/2024	4:03:46 PM	1,965.50	7	XCSE
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	1	AQEU
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:15 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	30	CEUX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	20	CEUX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	2	CEUX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	2	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	31	XCSE
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	1	AQEU
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:19 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	1	XCSE
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	2	TQEX
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	26	XCSE
Genmab A/S	01/05/2024	4:06:28 PM	1,965.00	16	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	34	CEUX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	34	CEUX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	7	CEUX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	5	TQEX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	4	TQEX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	37	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	38	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	46	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	44	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	2	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	8	TQEX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.50	7	TQEX
Genmab A/S	01/05/2024	4:08:55 PM	1,964.00	36	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,964.00	22	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,962.50	53	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,962.50	53	XCSE
Genmab A/S	01/05/2024	4:08:55 PM	1,962.50	18	CEUX
Genmab A/S	01/05/2024	4:10:44 PM	1,962.50	12	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:10:44 PM	1,962.50	5	TQEX
Genmab A/S	01/05/2024	4:10:44 PM	1,962.50	5	XCSE
Genmab A/S	01/05/2024	4:10:44 PM	1,962.50	6	XCSE
Genmab A/S	01/05/2024	4:10:44 PM	1,962.50	36	CEUX
Genmab A/S	01/05/2024	4:12:28 PM	1,963.50	39	CEUX
Genmab A/S	01/05/2024	4:12:38 PM	1,963.50	40	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	9	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	3	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	16	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	9	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	21	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	39	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	1	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	10	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	10	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	9	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	9	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	45	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	10	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	8	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	1	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	9	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	10	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	9	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	4	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	10	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	1	AQEU
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	5	TQEX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	3	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	10	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	2	CEUX
Genmab A/S	01/05/2024	4:12:45 PM	1,962.50	8	AQEU
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	14	AQEU
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	8	AQEU
Genmab A/S	01/05/2024	4:12:45 PM	1,962.50	36	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,962.50	30	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	34	XCSE
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	3	AQEU
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	8	AQEU
Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	2	XCSE

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:12:45 PM	1,963.00	12	XCSE
Genmab A/S	01/05/2024	4:14:38 PM	1,959.50	7	TQEX
Genmab A/S	01/05/2024	4:14:38 PM	1,959.50	45	CEUX
Genmab A/S	01/05/2024	4:14:38 PM	1,959.50	50	XCSE
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	5	TQEX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	5	TQEX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	XCSE
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	XCSE
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	4	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	3	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	5	TQEX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	8	TQEX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	9	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	XCSE
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	2	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	CEUX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	1	AQEU
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	AQEU
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	5	TQEX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	TQEX
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	10	XCSE
Genmab A/S	01/05/2024	4:16:43 PM	1,960.50	52	XCSE
Genmab A/S	01/05/2024	4:16:45 PM	1,960.50	11	CEUX
Genmab A/S	01/05/2024	4:16:45 PM	1,960.50	10	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	10	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	11	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	30	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	12	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	1	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	29	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	29	CEUX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	1	TQEX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	10	CEUX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	8	TQEX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	1	TQEX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	4	TQEX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	37	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	9	XCSE
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	34	CEUX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	9	AQEU
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	9	AQEU
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	5	TQEX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	9	TQEX
Genmab A/S	01/05/2024	4:17:17 PM	1,960.00	36	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	9	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	9	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	5	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	5	TQEX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	8	XCSE
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	8	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	1	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	8	CEUX
Genmab A/S	01/05/2024	4:19:41 PM	1,959.50	2	TQEX
Genmab A/S	01/05/2024	4:19:42 PM	1,959.50	8	XCSE
Genmab A/S	01/05/2024	4:19:43 PM	1,959.50	8	XCSE
Genmab A/S	01/05/2024	4:19:44 PM	1,959.50	8	XCSE
Genmab A/S	01/05/2024	4:20:52 PM	1,960.00	14	AQEU
Genmab A/S	01/05/2024	4:20:54 PM	1,959.00	39	CEUX
Genmab A/S	01/05/2024	4:20:54 PM	1,959.00	6	TQEX
Genmab A/S	01/05/2024	4:20:54 PM	1,959.00	44	XCSE
Genmab A/S	01/05/2024	4:21:41 PM	1,960.00	8	AQEU
Genmab A/S	01/05/2024	4:21:52 PM	1,960.00	8	AQEU
Genmab A/S	01/05/2024	4:21:56 PM	1,959.00	1	XCSE
Genmab A/S	01/05/2024	4:22:21 PM	1,959.00	37	CEUX
Genmab A/S	01/05/2024	4:22:22 PM	1,959.00	2	CEUX
Genmab A/S	01/05/2024	4:22:22 PM	1,959.00	6	AQEU
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	6	TQEX
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	43	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	127	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	20	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	19	CEUX
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	54	CEUX
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	6	TQEX
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	8	TQEX
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	44	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	20	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	40	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	4	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	18	XCSE
Genmab A/S	01/05/2024	4:22:51 PM	1,959.00	4	XCSE
Genmab A/S	01/05/2024	4:24:42 PM	1,959.00	8	AQEU
Genmab A/S	01/05/2024	4:25:15 PM	1,959.00	18	XCSE
Genmab A/S	01/05/2024	4:25:18 PM	1,959.00	51	CEUX
Genmab A/S	01/05/2024	4:25:18 PM	1,959.00	11	XCSE
Genmab A/S	01/05/2024	4:26:18 PM	1,964.00	43	CEUX
Genmab A/S	01/05/2024	4:26:18 PM	1,964.00	43	CEUX
Genmab A/S	01/05/2024	4:26:18 PM	1,964.00	19	CEUX
Genmab A/S	01/05/2024	4:26:18 PM	1,963.00	71	XCSE
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	16	CEUX
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	3	AQEU
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	17	XCSE
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	17	XCSE
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	17	XCSE
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	17	XCSE
Genmab A/S	01/05/2024	4:26:58 PM	1,964.50	16	CEUX
Genmab A/S	01/05/2024	4:27:40 PM	1,965.50	8	TQEX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	12	TQEX
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:28:35 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	4	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	20	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	18	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	41	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	5	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	2	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	2	AQEU
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	8	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	33	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	26	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	4	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	8	CEUX
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	2	AQEU
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:08 PM	1,965.00	12	XCSE
Genmab A/S	01/05/2024	4:29:13 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:29:13 PM	1,965.00	14	XCSE
Genmab A/S	01/05/2024	4:29:14 PM	1,965.00	5	TQEX
Genmab A/S	01/05/2024	4:29:14 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:29:14 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:29:15 PM	1,965.00	10	CEUX
Genmab A/S	01/05/2024	4:29:15 PM	1,965.00	10	XCSE
Genmab A/S	01/05/2024	4:30:59 PM	1,966.00	10	CEUX
Genmab A/S	01/05/2024	4:30:59 PM	1,966.00	26	CEUX
Genmab A/S	01/05/2024	4:30:59 PM	1,966.00	2	AQEU
Genmab A/S	01/05/2024	4:31:11 PM	1,966.50	35	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	5	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	6	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	2	AQEU
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	2	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	2	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	36	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	36	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	6	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	6	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	36	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	8	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	3	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:14 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:15 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:19 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:19 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:19 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:19 PM	1,966.00	11	CEUX
Genmab A/S	01/05/2024	4:31:19 PM	1,966.00	2	CEUX
Genmab A/S	01/05/2024	4:31:19 PM	1,966.00	7	CEUX
Genmab A/S	01/05/2024	4:31:20 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:31:20 PM	1,966.00	2	CEUX
Genmab A/S	01/05/2024	4:31:20 PM	1,966.00	12	XCSE
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	36	CEUX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	20	CEUX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	42	CEUX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	19	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	18	CEUX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	8	AQEU
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	16	AQEU
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	9	TQEX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	17	TQEX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	8	AQEU
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	1	AQEU
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	9	TQEX
Genmab A/S	01/05/2024	4:32:47 PM	1,966.50	7	TQEX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	64	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	65	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	13	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	9	AQEU
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	10	AQEU
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	10	TQEX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	70	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	73	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	15	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	58	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	58	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	65	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	65	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	51	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	12	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	26	CEUX
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	73	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	2	XCSE
Genmab A/S	01/05/2024	4:34:06 PM	1,966.00	52	XCSE
Genmab A/S	01/05/2024	4:34:12 PM	1,966.00	32	XCSE
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	9	TQEX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	60	CEUX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	66	XCSE
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	36	XCSE
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	22	XCSE
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	45	CEUX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	15	CEUX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	9	TQEX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	29	XCSE
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	5	XCSE
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	23	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	8	TQEX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	36	CEUX
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	8	AQEU
Genmab A/S	01/05/2024	4:38:31 PM	1,964.00	12	XCSE
Genmab A/S	01/05/2024	4:39:51 PM	1,963.00	26	CEUX
Genmab A/S	01/05/2024	4:39:51 PM	1,963.00	26	CEUX
Genmab A/S	01/05/2024	4:39:51 PM	1,963.00	8	CEUX
Genmab A/S	01/05/2024	4:39:51 PM	1,963.00	29	XCSE
Genmab A/S	01/05/2024	4:39:51 PM	1,963.00	4	XCSE
Genmab A/S	01/05/2024	4:40:45 PM	1,962.50	27	XCSE
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	191	XCSE
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	28	CEUX
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	90	CEUX
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	2	CEUX
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	50	CEUX
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	5	AQEU
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	19	AQEU
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	25	TQEX
Genmab A/S	01/05/2024	4:41:35 PM	1,962.50	2	TQEX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	44	CEUX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	25	CEUX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	7	AQEU
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	44	CEUX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	7	AQEU
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	50	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	15	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	23	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	27	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	59	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	50	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	36	XCSE
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	44	CEUX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	33	CEUX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	44	CEUX
Genmab A/S	01/05/2024	4:44:32 PM	1,966.00	23	CEUX
Genmab A/S	01/05/2024	4:44:33 PM	1,966.00	21	CEUX
Genmab A/S	01/05/2024	4:44:33 PM	1,966.00	50	XCSE
Genmab A/S	01/05/2024	4:47:04 PM	1,970.00	36	CEUX
Genmab A/S	01/05/2024	4:47:10 PM	1,970.00	38	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	4	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	9	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	1	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	14	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	10	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	1	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	64	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	9	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	3	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	8	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	2	AQEU
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:11 PM	1,969.50	36	XCSE
Genmab A/S	01/05/2024	4:47:12 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:12 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	8	XCSE
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	2	AQEU
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	8	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	2	AQEU
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	3	AQEU
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	2	AQEU
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	3	XCSE
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	4	XCSE
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	3	XCSE
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	11	CEUX
Genmab A/S	01/05/2024	4:47:14 PM	1,969.50	8	XCSE
Genmab A/S	01/05/2024	4:47:15 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:15 PM	1,969.50	36	XCSE
Genmab A/S	01/05/2024	4:47:15 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:15 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:15 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:15 PM	1,969.50	11	XCSE
Genmab A/S	01/05/2024	4:47:51 PM	1,970.50	29	XCSE
Genmab A/S	01/05/2024	4:47:51 PM	1,970.50	27	CEUX
Genmab A/S	01/05/2024	4:47:51 PM	1,970.50	27	CEUX
Genmab A/S	01/05/2024	4:47:53 PM	1,970.50	29	XCSE
Genmab A/S	01/05/2024	4:47:53 PM	1,970.50	16	XCSE
Genmab A/S	01/05/2024	4:47:53 PM	1,970.50	27	CEUX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	5	TQEX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	13	CEUX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	13	CEUX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	11	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	36	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	11	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	15	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	11	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	28	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	13	CEUX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	5	TQEX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	12	CEUX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	1	CEUX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	1	AQEU
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	5	TQEX
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	11	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	1	XCSE
Genmab A/S	01/05/2024	4:48:09 PM	1,970.00	10	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:48:39 PM	1,970.50	5	TQEX
Genmab A/S	01/05/2024	4:48:39 PM	1,970.50	11	XCSE
Genmab A/S	01/05/2024	4:48:39 PM	1,970.50	12	XCSE
Genmab A/S	01/05/2024	4:48:39 PM	1,970.50	31	XCSE
Genmab A/S	01/05/2024	4:48:39 PM	1,970.50	30	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	72	XCSE
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	13	XCSE
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	59	XCSE
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	55	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	10	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	10	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	13	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	42	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	43	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	29	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	36	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	23	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	65	XCSE
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	7	XCSE
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	29	XCSE
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	24	CEUX
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	10	AQEU
Genmab A/S	01/05/2024	4:49:52 PM	1,971.50	7	AQEU
Genmab A/S	01/05/2024	4:49:53 PM	1,971.50	2	AQEU
Genmab A/S	01/05/2024	4:49:53 PM	1,971.50	42	CEUX
Genmab A/S	01/05/2024	4:49:53 PM	1,971.50	1	CEUX
Genmab A/S	01/05/2024	4:49:53 PM	1,971.50	47	XCSE
Genmab A/S	01/05/2024	4:49:53 PM	1,971.50	4	CEUX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	8	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	24	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	26	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	9	CEUX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	1	AQEU
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	5	TQEX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	4	CEUX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	5	CEUX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	5	TQEX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	5	CEUX
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	1	AQEU
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	5	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	8	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	24	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	4	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	4	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	24	XCSE
Genmab A/S	01/05/2024	4:51:10 PM	1,971.00	4	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	25	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	14	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	20	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	20	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	34	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	5	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	15	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	5	XCSE
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	53	CEUX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	36	CEUX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	8	AQEU
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	43	CEUX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	10	CEUX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	7	CEUX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	8	TQEX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	8	TQEX
Genmab A/S	01/05/2024	4:51:26 PM	1,971.00	85	XCSE
Genmab A/S	01/05/2024	4:51:55 PM	1,970.00	36	CEUX
Genmab A/S	01/05/2024	4:52:10 PM	1,969.50	52	XCSE
Genmab A/S	01/05/2024	4:52:10 PM	1,969.50	65	AQEU
Genmab A/S	01/05/2024	4:52:48 PM	1,969.50	9	XCSE
Genmab A/S	01/05/2024	4:52:48 PM	1,969.50	17	XCSE
Genmab A/S	01/05/2024	4:52:48 PM	1,969.50	7	XCSE
Genmab A/S	01/05/2024	4:53:43 PM	1,970.00	23	XCSE
Genmab A/S	01/05/2024	4:53:43 PM	1,970.00	124	XCSE
Genmab A/S	02/05/2024	9:05:14 AM	1,994.50	75	XCSE
Genmab A/S	02/05/2024	9:05:14 AM	1,994.50	13	XCSE
Genmab A/S	02/05/2024	9:07:39 AM	1,997.50	25	XCSE
Genmab A/S	02/05/2024	9:07:48 AM	1,998.50	45	XCSE
Genmab A/S	02/05/2024	9:08:08 AM	1,996.00	35	TQEX
Genmab A/S	02/05/2024	9:08:08 AM	1,996.00	10	TQEX
Genmab A/S	02/05/2024	9:11:25 AM	1,997.50	40	XCSE
Genmab A/S	02/05/2024	9:12:49 AM	1,992.00	38	CEUX
Genmab A/S	02/05/2024	9:14:29 AM	1,988.50	5	CEUX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	9:15:03 AM	1,988.50	43	CEUX
Genmab A/S	02/05/2024	9:16:44 AM	1,984.00	48	CEUX
Genmab A/S	02/05/2024	9:17:52 AM	1,984.00	41	XCSE
Genmab A/S	02/05/2024	9:19:04 AM	1,983.00	50	XCSE
Genmab A/S	02/05/2024	9:20:28 AM	1,976.00	24	TQEX
Genmab A/S	02/05/2024	9:20:28 AM	1,976.00	23	TQEX
Genmab A/S	02/05/2024	9:22:27 AM	1,975.50	22	CEUX
Genmab A/S	02/05/2024	9:22:27 AM	1,975.50	22	CEUX
Genmab A/S	02/05/2024	9:22:27 AM	1,975.50	15	CEUX
Genmab A/S	02/05/2024	9:22:27 AM	1,975.50	7	CEUX
Genmab A/S	02/05/2024	9:25:04 AM	1,975.50	41	CEUX
Genmab A/S	02/05/2024	9:25:08 AM	1,974.50	33	XCSE
Genmab A/S	02/05/2024	9:25:08 AM	1,974.50	4	XCSE
Genmab A/S	02/05/2024	9:28:23 AM	1,973.50	6	CEUX
Genmab A/S	02/05/2024	9:28:31 AM	1,973.50	33	CEUX
Genmab A/S	02/05/2024	9:28:31 AM	1,973.50	28	CEUX
Genmab A/S	02/05/2024	9:28:31 AM	1,973.50	11	CEUX
Genmab A/S	02/05/2024	9:28:31 AM	1,971.50	30	XCSE
Genmab A/S	02/05/2024	9:28:31 AM	1,971.50	8	XCSE
Genmab A/S	02/05/2024	9:28:31 AM	1,971.00	27	XCSE
Genmab A/S	02/05/2024	9:28:31 AM	1,971.00	12	XCSE
Genmab A/S	02/05/2024	9:30:00 AM	1,971.00	38	XCSE
Genmab A/S	02/05/2024	9:36:23 AM	1,970.50	10	XCSE
Genmab A/S	02/05/2024	9:36:41 AM	1,971.00	34	XCSE
Genmab A/S	02/05/2024	9:36:41 AM	1,971.00	1	XCSE
Genmab A/S	02/05/2024	9:36:41 AM	1,971.00	34	XCSE
Genmab A/S	02/05/2024	9:38:04 AM	1,971.50	53	CEUX
Genmab A/S	02/05/2024	9:41:00 AM	1,970.50	10	CEUX
Genmab A/S	02/05/2024	9:41:00 AM	1,970.50	32	CEUX
Genmab A/S	02/05/2024	9:44:36 AM	1,970.00	27	CEUX
Genmab A/S	02/05/2024	9:44:37 AM	1,970.00	27	CEUX
Genmab A/S	02/05/2024	9:45:34 AM	1,970.00	45	XCSE
Genmab A/S	02/05/2024	9:48:56 AM	1,971.50	47	CEUX
Genmab A/S	02/05/2024	9:50:17 AM	1,968.50	7	XCSE
Genmab A/S	02/05/2024	9:50:17 AM	1,968.50	44	XCSE
Genmab A/S	02/05/2024	9:50:17 AM	1,968.00	59	CEUX
Genmab A/S	02/05/2024	9:51:19 AM	1,966.50	60	CEUX
Genmab A/S	02/05/2024	9:57:28 AM	1,965.50	54	CEUX
Genmab A/S	02/05/2024	9:57:28 AM	1,964.50	8	TQEX
Genmab A/S	02/05/2024	9:57:28 AM	1,964.50	48	TQEX

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	9:57:28 AM	1,964.50	52	CEUX
Genmab A/S	02/05/2024	10:04:57 AM	1,959.00	7	CEUX
Genmab A/S	02/05/2024	10:04:59 AM	1,959.00	41	CEUX
Genmab A/S	02/05/2024	10:05:00 AM	1,959.00	5	CEUX
Genmab A/S	02/05/2024	10:07:51 AM	1,960.50	39	XCSE
Genmab A/S	02/05/2024	10:07:51 AM	1,960.50	3	XCSE
Genmab A/S	02/05/2024	10:09:36 AM	1,963.50	47	XCSE
Genmab A/S	02/05/2024	10:12:58 AM	1,963.50	42	XCSE
Genmab A/S	02/05/2024	10:12:58 AM	1,963.50	28	XCSE
Genmab A/S	02/05/2024	10:12:58 AM	1,963.50	8	XCSE
Genmab A/S	02/05/2024	10:15:20 AM	1,964.00	27	CEUX
Genmab A/S	02/05/2024	10:15:20 AM	1,964.00	27	CEUX
Genmab A/S	02/05/2024	10:15:20 AM	1,964.00	19	CEUX
Genmab A/S	02/05/2024	10:18:58 AM	1,962.50	47	XCSE
Genmab A/S	02/05/2024	10:18:59 AM	1,961.50	53	XCSE
Genmab A/S	02/05/2024	10:24:58 AM	1,964.00	41	CEUX
Genmab A/S	02/05/2024	10:26:51 AM	1,966.00	24	CEUX
Genmab A/S	02/05/2024	10:26:51 AM	1,966.00	34	CEUX
Genmab A/S	02/05/2024	10:30:27 AM	1,961.50	40	CEUX
Genmab A/S	02/05/2024	10:30:27 AM	1,961.50	6	CEUX
Genmab A/S	02/05/2024	10:30:27 AM	1,961.50	1	CEUX
Genmab A/S	02/05/2024	10:34:03 AM	1,966.50	55	CEUX
Genmab A/S	02/05/2024	10:36:00 AM	1,966.50	52	CEUX
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	5	TQEX
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	5	TQEX
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	5	TQEX
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	17	XCSE
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	36	XCSE
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	17	XCSE
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	17	XCSE
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	36	XCSE
Genmab A/S	02/05/2024	10:41:59 AM	1,971.50	14	XCSE
Genmab A/S	02/05/2024	10:45:16 AM	1,971.50	34	TQEX
Genmab A/S	02/05/2024	10:45:16 AM	1,971.50	3	TQEX
Genmab A/S	02/05/2024	10:45:16 AM	1,971.50	35	CEUX
Genmab A/S	02/05/2024	10:45:16 AM	1,971.00	35	XCSE
Genmab A/S	02/05/2024	10:53:50 AM	1,969.00	43	CEUX
Genmab A/S	02/05/2024	10:56:23 AM	1,967.00	38	XCSE
Genmab A/S	02/05/2024	11:00:07 AM	1,970.00	36	AQEU
Genmab A/S	02/05/2024	11:01:00 AM	1,969.50	36	CEUX

100

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	11:04:10 AM	1,967.50	41	TQEX
Genmab A/S	02/05/2024	11:04:53 AM	1,968.50	37	CEUX
Genmab A/S	02/05/2024	11:07:36 AM	1,967.00	81	XCSE
Genmab A/S	02/05/2024	11:09:15 AM	1,964.50	8	XCSE
Genmab A/S	02/05/2024	11:09:15 AM	1,964.50	60	XCSE
Genmab A/S	02/05/2024	11:17:54 AM	1,963.50	42	XCSE
Genmab A/S	02/05/2024	11:20:37 AM	1,965.00	39	XCSE
Genmab A/S	02/05/2024	11:22:17 AM	1,965.50	52	CEUX
Genmab A/S	02/05/2024	11:25:31 AM	1,966.00	8	TQEX
Genmab A/S	02/05/2024	11:25:51 AM	1,966.00	8	TQEX
Genmab A/S	02/05/2024	11:25:51 AM	1,965.00	62	XCSE
Genmab A/S	02/05/2024	11:27:46 AM	1,964.50	86	CEUX
Genmab A/S	02/05/2024	11:33:39 AM	1,965.50	38	CEUX
Genmab A/S	02/05/2024	11:33:44 AM	1,964.00	16	XCSE
Genmab A/S	02/05/2024	11:33:44 AM	1,964.00	20	XCSE
Genmab A/S	02/05/2024	11:38:35 AM	1,965.00	40	AQEU
Genmab A/S	02/05/2024	11:40:58 AM	1,965.00	8	AQEU
Genmab A/S	02/05/2024	11:40:58 AM	1,965.00	19	XCSE
Genmab A/S	02/05/2024	11:40:58 AM	1,965.00	9	XCSE
Genmab A/S	02/05/2024	11:41:05 AM	1,964.00	36	XCSE
Genmab A/S	02/05/2024	11:41:06 AM	1,963.00	12	XCSE
Genmab A/S	02/05/2024	11:41:06 AM	1,963.00	23	XCSE
Genmab A/S	02/05/2024	11:47:41 AM	1,964.00	41	XCSE
Genmab A/S	02/05/2024	11:47:48 AM	1,963.50	24	XCSE
Genmab A/S	02/05/2024	11:47:48 AM	1,963.50	14	XCSE
Genmab A/S	02/05/2024	11:51:01 AM	1,965.00	39	XCSE
Genmab A/S	02/05/2024	11:51:01 AM	1,963.50	40	XCSE
Genmab A/S	02/05/2024	11:51:01 AM	1,964.00	25	XCSE
Genmab A/S	02/05/2024	11:51:01 AM	1,964.00	15	XCSE
Genmab A/S	02/05/2024	11:51:01 AM	1,963.00	30	CEUX
Genmab A/S	02/05/2024	11:51:01 AM	1,963.00	9	CEUX
Genmab A/S	02/05/2024	11:59:28 AM	1,958.00	22	XCSE
Genmab A/S	02/05/2024	11:59:28 AM	1,958.00	21	XCSE
Genmab A/S	02/05/2024	12:02:55 PM	1,958.50	43	CEUX
Genmab A/S	02/05/2024	12:02:56 PM	1,957.50	44	XCSE
Genmab A/S	02/05/2024	12:07:39 PM	1,960.00	42	XCSE
Genmab A/S	02/05/2024	12:09:41 PM	1,959.50	24	AQEU
Genmab A/S	02/05/2024	12:10:34 PM	1,960.00	34	XCSE
Genmab A/S	02/05/2024	12:10:34 PM	1,960.00	9	XCSE
Genmab A/S	02/05/2024	12:13:45 PM	1,960.50	36	XCSE

101

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	12:18:20 PM	1,961.00	26	CEUX
Genmab A/S	02/05/2024	12:18:20 PM	1,961.00	14	CEUX
Genmab A/S	02/05/2024	12:20:05 PM	1,961.00	45	XCSE
Genmab A/S	02/05/2024	12:20:05 PM	1,960.00	2	AQEU
Genmab A/S	02/05/2024	12:21:28 PM	1,961.00	46	CEUX
Genmab A/S	02/05/2024	12:26:26 PM	1,961.00	36	CEUX
Genmab A/S	02/05/2024	12:26:26 PM	1,961.00	3	TQEX
Genmab A/S	02/05/2024	12:27:46 PM	1,960.00	16	CEUX
Genmab A/S	02/05/2024	12:27:46 PM	1,960.00	33	CEUX
Genmab A/S	02/05/2024	12:27:50 PM	1,959.00	40	CEUX
Genmab A/S	02/05/2024	12:31:41 PM	1,959.00	39	CEUX
Genmab A/S	02/05/2024	12:31:41 PM	1,959.00	39	XCSE
Genmab A/S	02/05/2024	12:31:41 PM	1,958.50	17	TQEX
Genmab A/S	02/05/2024	12:31:41 PM	1,958.50	23	TQEX
Genmab A/S	02/05/2024	12:41:34 PM	1,958.00	40	CEUX
Genmab A/S	02/05/2024	12:45:01 PM	1,961.50	36	XCSE
Genmab A/S	02/05/2024	12:45:01 PM	1,961.50	40	CEUX
Genmab A/S	02/05/2024	12:48:53 PM	1,962.00	38	CEUX
Genmab A/S	02/05/2024	12:51:09 PM	1,960.50	38	CEUX
Genmab A/S	02/05/2024	12:53:22 PM	1,959.00	40	CEUX
Genmab A/S	02/05/2024	12:54:09 PM	1,959.50	40	CEUX
Genmab A/S	02/05/2024	12:56:09 PM	1,957.50	43	XCSE
Genmab A/S	02/05/2024	12:59:09 PM	1,959.00	38	CEUX
Genmab A/S	02/05/2024	1:03:09 PM	1,960.00	24	TQEX
Genmab A/S	02/05/2024	1:03:09 PM	1,960.00	24	TQEX
Genmab A/S	02/05/2024	1:03:09 PM	1,960.00	6	TQEX
Genmab A/S	02/05/2024	1:04:09 PM	1,959.50	46	XCSE
Genmab A/S	02/05/2024	1:10:05 PM	1,961.00	41	CEUX
Genmab A/S	02/05/2024	1:12:10 PM	1,961.00	41	CEUX
Genmab A/S	02/05/2024	1:14:45 PM	1,960.50	41	XCSE
Genmab A/S	02/05/2024	1:14:45 PM	1,960.00	41	CEUX
Genmab A/S	02/05/2024	1:19:27 PM	1,962.50	48	CEUX
Genmab A/S	02/05/2024	1:19:27 PM	1,961.50	44	CEUX
Genmab A/S	02/05/2024	1:24:25 PM	1,963.50	6	CEUX
Genmab A/S	02/05/2024	1:24:25 PM	1,963.50	34	CEUX
Genmab A/S	02/05/2024	1:28:16 PM	1,963.00	3	XCSE
Genmab A/S	02/05/2024	1:28:16 PM	1,963.00	31	XCSE
Genmab A/S	02/05/2024	1:28:16 PM	1,963.00	6	XCSE
Genmab A/S	02/05/2024	1:28:26 PM	1,962.00	46	CEUX
Genmab A/S	02/05/2024	1:28:26 PM	1,962.00	36	XCSE

102

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	1:28:26 PM	1,961.50	36	CEUX
Genmab A/S	02/05/2024	1:28:26 PM	1,961.50	37	AQEU
Genmab A/S	02/05/2024	1:28:26 PM	1,961.50	11	AQEU
Genmab A/S	02/05/2024	1:30:00 PM	1,956.50	16	CEUX
Genmab A/S	02/05/2024	1:30:00 PM	1,956.50	10	CEUX
Genmab A/S	02/05/2024	1:30:00 PM	1,956.50	17	CEUX
Genmab A/S	02/05/2024	1:41:01 PM	1,967.50	37	XCSE
Genmab A/S	02/05/2024	1:41:23 PM	1,966.50	37	CEUX
Genmab A/S	02/05/2024	1:41:23 PM	1,966.00	40	XCSE
Genmab A/S	02/05/2024	1:41:23 PM	1,965.50	39	CEUX
Genmab A/S	02/05/2024	1:41:23 PM	1,965.50	38	XCSE
Genmab A/S	02/05/2024	1:49:24 PM	1,965.50	37	CEUX
Genmab A/S	02/05/2024	1:50:51 PM	1,965.50	4	XCSE
Genmab A/S	02/05/2024	1:50:51 PM	1,965.50	36	XCSE
Genmab A/S	02/05/2024	1:53:45 PM	1,969.00	38	CEUX
Genmab A/S	02/05/2024	1:57:14 PM	1,973.00	11	CEUX
Genmab A/S	02/05/2024	1:57:14 PM	1,973.00	11	CEUX
Genmab A/S	02/05/2024	1:57:48 PM	1,976.00	43	XCSE
Genmab A/S	02/05/2024	1:59:11 PM	1,977.50	40	XCSE
Genmab A/S	02/05/2024	2:00:02 PM	1,976.50	35	CEUX
Genmab A/S	02/05/2024	2:00:34 PM	1,974.00	38	XCSE
Genmab A/S	02/05/2024	2:00:34 PM	1,973.50	36	CEUX
Genmab A/S	02/05/2024	2:06:27 PM	1,968.50	43	TQEX
Genmab A/S	02/05/2024	2:08:57 PM	1,967.50	47	XCSE
Genmab A/S	02/05/2024	2:11:03 PM	1,968.50	38	XCSE
Genmab A/S	02/05/2024	2:13:56 PM	1,970.00	34	CEUX
Genmab A/S	02/05/2024	2:13:56 PM	1,969.00	8	AQEU
Genmab A/S	02/05/2024	2:13:56 PM	1,969.50	35	CEUX
Genmab A/S	02/05/2024	2:13:56 PM	1,969.00	27	CEUX
Genmab A/S	02/05/2024	2:16:50 PM	1,967.00	46	XCSE
Genmab A/S	02/05/2024	2:20:43 PM	1,966.50	43	CEUX
Genmab A/S	02/05/2024	2:24:43 PM	1,966.00	38	XCSE
Genmab A/S	02/05/2024	2:25:10 PM	1,969.00	36	CEUX
Genmab A/S	02/05/2024	2:26:41 PM	1,968.50	35	CEUX
Genmab A/S	02/05/2024	2:29:39 PM	1,967.00	22	CEUX
Genmab A/S	02/05/2024	2:29:39 PM	1,967.00	22	CEUX
Genmab A/S	02/05/2024	2:29:39 PM	1,967.00	22	CEUX
Genmab A/S	02/05/2024	2:29:39 PM	1,967.00	22	CEUX
Genmab A/S	02/05/2024	2:29:39 PM	1,967.00	4	CEUX
Genmab A/S	02/05/2024	2:31:50 PM	1,964.50	54	XCSE

103

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	2:36:31 PM	1,964.00	38	XCSE
Genmab A/S	02/05/2024	2:36:31 PM	1,964.00	21	XCSE
Genmab A/S	02/05/2024	2:37:22 PM	1,964.00	13	CEUX
Genmab A/S	02/05/2024	2:38:46 PM	1,977.50	43	XCSE
Genmab A/S	02/05/2024	2:38:47 PM	1,976.50	58	AQEU
Genmab A/S	02/05/2024	2:38:47 PM	1,976.00	46	AQEU
Genmab A/S	02/05/2024	2:38:47 PM	1,975.50	38	XCSE
Genmab A/S	02/05/2024	2:45:27 PM	1,967.00	56	XCSE
Genmab A/S	02/05/2024	2:48:36 PM	1,981.50	55	CEUX
Genmab A/S	02/05/2024	2:49:54 PM	1,973.00	8	AQEU
Genmab A/S	02/05/2024	2:49:54 PM	1,973.50	8	AQEU
Genmab A/S	02/05/2024	2:51:04 PM	1,971.50	45	XCSE
Genmab A/S	02/05/2024	2:52:32 PM	1,969.00	48	TQEX
Genmab A/S	02/05/2024	2:55:47 PM	1,969.00	2	CEUX
Genmab A/S	02/05/2024	2:55:47 PM	1,969.00	33	CEUX
Genmab A/S	02/05/2024	2:56:33 PM	1,967.50	39	XCSE
Genmab A/S	02/05/2024	2:56:33 PM	1,967.50	39	XCSE
Genmab A/S	02/05/2024	2:56:33 PM	1,967.50	18	XCSE
Genmab A/S	02/05/2024	3:01:02 PM	1,968.00	1	CEUX
Genmab A/S	02/05/2024	3:01:04 PM	1,968.00	34	CEUX
Genmab A/S	02/05/2024	3:01:04 PM	1,968.00	35	CEUX
Genmab A/S	02/05/2024	3:04:23 PM	1,968.00	37	XCSE
Genmab A/S	02/05/2024	3:06:57 PM	1,967.50	36	CEUX
Genmab A/S	02/05/2024	3:07:32 PM	1,967.00	6	CEUX
Genmab A/S	02/05/2024	3:07:32 PM	1,967.00	29	CEUX
Genmab A/S	02/05/2024	3:09:00 PM	1,966.50	37	CEUX
Genmab A/S	02/05/2024	3:09:00 PM	1,965.50	38	TQEX
Genmab A/S	02/05/2024	3:09:01 PM	1,964.50	86	AQEU
Genmab A/S	02/05/2024	3:16:28 PM	1,966.50	24	CEUX
Genmab A/S	02/05/2024	3:17:55 PM	1,968.50	46	CEUX
Genmab A/S	02/05/2024	3:18:53 PM	1,967.50	60	XCSE
Genmab A/S	02/05/2024	3:18:53 PM	1,967.50	45	TQEX
Genmab A/S	02/05/2024	3:18:53 PM	1,967.50	1	TQEX
Genmab A/S	02/05/2024	3:18:53 PM	1,967.00	45	CEUX
Genmab A/S	02/05/2024	3:18:54 PM	1,965.50	8	AQEU
Genmab A/S	02/05/2024	3:18:54 PM	1,965.50	8	AQEU
Genmab A/S	02/05/2024	3:28:05 PM	1,965.50	35	XCSE
Genmab A/S	02/05/2024	3:28:36 PM	1,964.50	87	XCSE
Genmab A/S	02/05/2024	3:28:36 PM	1,963.50	63	XCSE
Genmab A/S	02/05/2024	3:28:36 PM	1,963.50	20	XCSE

104

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	3:30:14 PM	1,965.00	75	TQEX
Genmab A/S	02/05/2024	3:30:14 PM	1,965.00	7	TQEX
Genmab A/S	02/05/2024	3:30:40 PM	1,958.50	77	CEUX
Genmab A/S	02/05/2024	3:35:46 PM	1,958.00	4	XCSE
Genmab A/S	02/05/2024	3:35:58 PM	1,955.50	62	CEUX
Genmab A/S	02/05/2024	3:39:37 PM	1,951.00	69	XCSE
Genmab A/S	02/05/2024	3:41:29 PM	1,948.00	47	XCSE
Genmab A/S	02/05/2024	3:41:29 PM	1,948.00	52	XCSE
Genmab A/S	02/05/2024	3:41:31 PM	1,945.50	8	CEUX
Genmab A/S	02/05/2024	3:43:27 PM	1,941.00	79	XCSE
Genmab A/S	02/05/2024	3:45:02 PM	1,942.50	11	AQEU
Genmab A/S	02/05/2024	3:48:30 PM	1,945.50	23	XCSE
Genmab A/S	02/05/2024	3:48:30 PM	1,945.50	84	CEUX
Genmab A/S	02/05/2024	3:48:30 PM	1,945.50	23	XCSE
Genmab A/S	02/05/2024	3:48:30 PM	1,945.50	20	XCSE
Genmab A/S	02/05/2024	3:49:01 PM	1,948.50	13	CEUX
Genmab A/S	02/05/2024	3:50:19 PM	1,948.50	49	CEUX
Genmab A/S	02/05/2024	3:51:27 PM	1,948.50	80	CEUX
Genmab A/S	02/05/2024	3:53:15 PM	1,948.00	35	CEUX
Genmab A/S	02/05/2024	3:53:15 PM	1,948.00	21	CEUX
Genmab A/S	02/05/2024	3:53:15 PM	1,947.00	43	XCSE
Genmab A/S	02/05/2024	3:53:15 PM	1,947.00	13	XCSE
Genmab A/S	02/05/2024	3:53:15 PM	1,946.50	56	CEUX
Genmab A/S	02/05/2024	3:53:16 PM	1,946.00	57	CEUX
Genmab A/S	02/05/2024	3:53:16 PM	1,946.00	6	CEUX
Genmab A/S	02/05/2024	3:59:01 PM	1,946.50	59	XCSE
Genmab A/S	02/05/2024	4:00:21 PM	1,950.00	21	CEUX
Genmab A/S	02/05/2024	4:00:21 PM	1,950.00	21	CEUX
Genmab A/S	02/05/2024	4:00:21 PM	1,950.00	21	CEUX
Genmab A/S	02/05/2024	4:00:21 PM	1,950.00	2	CEUX
Genmab A/S	02/05/2024	4:00:21 PM	1,950.00	13	CEUX
Genmab A/S	02/05/2024	4:01:31 PM	1,951.50	41	CEUX
Genmab A/S	02/05/2024	4:01:31 PM	1,949.50	8	XCSE
Genmab A/S	02/05/2024	4:02:39 PM	1,945.50	48	XCSE
Genmab A/S	02/05/2024	4:06:00 PM	1,950.00	8	AQEU
Genmab A/S	02/05/2024	4:06:00 PM	1,950.00	8	AQEU
Genmab A/S	02/05/2024	4:06:01 PM	1,950.50	9	AQEU
Genmab A/S	02/05/2024	4:06:02 PM	1,950.00	21	XCSE
Genmab A/S	02/05/2024	4:06:03 PM	1,950.00	21	XCSE
Genmab A/S	02/05/2024	4:06:03 PM	1,950.00	21	XCSE

105

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:06:03 PM	1,950.00	41	XCSE
Genmab A/S	02/05/2024	4:07:02 PM	1,949.50	53	XCSE
Genmab A/S	02/05/2024	4:08:20 PM	1,948.50	23	CEUX
Genmab A/S	02/05/2024	4:08:20 PM	1,948.50	17	CEUX
Genmab A/S	02/05/2024	4:09:23 PM	1,946.00	32	XCSE
Genmab A/S	02/05/2024	4:09:23 PM	1,946.00	11	XCSE
Genmab A/S	02/05/2024	4:10:45 PM	1,947.00	42	CEUX
Genmab A/S	02/05/2024	4:12:22 PM	1,951.00	42	XCSE
Genmab A/S	02/05/2024	4:12:22 PM	1,951.00	36	AQEU
Genmab A/S	02/05/2024	4:14:22 PM	1,954.50	75	CEUX
Genmab A/S	02/05/2024	4:15:51 PM	1,953.50	15	CEUX
Genmab A/S	02/05/2024	4:15:51 PM	1,953.50	35	CEUX
Genmab A/S	02/05/2024	4:16:29 PM	1,951.50	38	XCSE
Genmab A/S	02/05/2024	4:17:39 PM	1,950.50	43	CEUX
Genmab A/S	02/05/2024	4:17:40 PM	1,950.00	41	XCSE
Genmab A/S	02/05/2024	4:17:40 PM	1,949.50	41	XCSE
Genmab A/S	02/05/2024	4:20:39 PM	1,946.50	43	CEUX
Genmab A/S	02/05/2024	4:21:47 PM	1,945.50	34	XCSE
Genmab A/S	02/05/2024	4:21:47 PM	1,945.50	9	XCSE
Genmab A/S	02/05/2024	4:24:02 PM	1,946.50	10	AQEU
Genmab A/S	02/05/2024	4:24:02 PM	1,946.50	15	AQEU
Genmab A/S	02/05/2024	4:24:02 PM	1,946.50	15	AQEU
Genmab A/S	02/05/2024	4:24:02 PM	1,946.50	10	AQEU
Genmab A/S	02/05/2024	4:24:02 PM	1,946.50	25	AQEU
Genmab A/S	02/05/2024	4:25:57 PM	1,945.50	44	XCSE
Genmab A/S	02/05/2024	4:25:57 PM	1,945.50	29	CEUX
Genmab A/S	02/05/2024	4:25:57 PM	1,945.50	15	CEUX
Genmab A/S	02/05/2024	4:28:05 PM	1,944.00	3	XCSE
Genmab A/S	02/05/2024	4:28:05 PM	1,944.00	41	XCSE
Genmab A/S	02/05/2024	4:30:45 PM	1,947.50	8	AQEU
Genmab A/S	02/05/2024	4:30:45 PM	1,947.50	5	AQEU
Genmab A/S	02/05/2024	4:30:45 PM	1,947.50	8	AQEU
Genmab A/S	02/05/2024	4:31:25 PM	1,947.50	8	AQEU
Genmab A/S	02/05/2024	4:31:25 PM	1,947.50	1	XCSE
Genmab A/S	02/05/2024	4:31:25 PM	1,947.50	13	XCSE
Genmab A/S	02/05/2024	4:31:25 PM	1,947.50	13	XCSE
Genmab A/S	02/05/2024	4:32:09 PM	1,947.50	39	CEUX
Genmab A/S	02/05/2024	4:33:05 PM	1,949.50	3	AQEU
Genmab A/S	02/05/2024	4:33:12 PM	1,949.50	8	AQEU
Genmab A/S	02/05/2024	4:33:30 PM	1,949.50	38	AQEU

106

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:34:58 PM	1,949.50	34	CEUX
Genmab A/S	02/05/2024	4:35:46 PM	1,956.00	41	AQEU
Genmab A/S	02/05/2024	4:35:47 PM	1,955.00	21	XCSE
Genmab A/S	02/05/2024	4:35:47 PM	1,955.00	21	XCSE
Genmab A/S	02/05/2024	4:35:47 PM	1,955.00	24	XCSE
Genmab A/S	02/05/2024	4:35:47 PM	1,955.00	21	XCSE
Genmab A/S	02/05/2024	4:35:47 PM	1,955.00	18	XCSE
Genmab A/S	02/05/2024	4:37:06 PM	1,956.50	52	XCSE
Genmab A/S	02/05/2024	4:38:03 PM	1,953.00	2	XCSE
Genmab A/S	02/05/2024	4:38:17 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:38:18 PM	1,953.00	41	XCSE
Genmab A/S	02/05/2024	4:39:30 PM	1,951.50	9	CEUX
Genmab A/S	02/05/2024	4:39:30 PM	1,951.50	9	CEUX
Genmab A/S	02/05/2024	4:39:30 PM	1,951.50	5	TQEX
Genmab A/S	02/05/2024	4:39:30 PM	1,951.50	8	XCSE
Genmab A/S	02/05/2024	4:39:31 PM	1,951.50	8	XCSE
Genmab A/S	02/05/2024	4:39:32 PM	1,951.50	8	XCSE
Genmab A/S	02/05/2024	4:40:25 PM	1,955.50	11	CEUX
Genmab A/S	02/05/2024	4:40:25 PM	1,955.50	14	CEUX
Genmab A/S	02/05/2024	4:40:25 PM	1,955.50	25	CEUX
Genmab A/S	02/05/2024	4:40:25 PM	1,955.50	25	CEUX
Genmab A/S	02/05/2024	4:40:25 PM	1,955.50	1	CEUX
Genmab A/S	02/05/2024	4:40:25 PM	1,955.50	8	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	9	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	1	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	2	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	3	XCSE
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	23	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	3	CEUX

107

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	26	CEUX
Genmab A/S	02/05/2024	4:42:12 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	9	XCSE
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	9	CEUX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	9	CEUX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	9	CEUX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	2	CEUX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	5	TQEX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	2	TQEX
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	9	XCSE
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	11	XCSE
Genmab A/S	02/05/2024	4:44:19 PM	1,952.50	2	TQEX
Genmab A/S	02/05/2024	4:44:21 PM	1,952.50	9	CEUX
Genmab A/S	02/05/2024	4:44:21 PM	1,952.50	1	TQEX
Genmab A/S	02/05/2024	4:44:21 PM	1,952.50	9	XCSE
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	1	TQEX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	7	XCSE
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	1	AQEU
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	7	XCSE
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	9	CEUX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:34 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	6	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	4	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	6	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	2	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	11	CEUX

108

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	1	AQEU
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	XCSE
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	11	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	8	AQEU
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	10	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	17	TQEX
Genmab A/S	02/05/2024	4:45:35 PM	1,953.00	5	AQEU
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	10	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	4	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	6	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	4	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	5	TQEX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	4	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	2	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	4	CEUX
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	1	AQEU
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	9	XCSE
Genmab A/S	02/05/2024	4:46:18 PM	1,952.00	9	XCSE
Genmab A/S	02/05/2024	4:46:37 PM	1,951.50	10	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	10	CEUX
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	1	AQEU
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	3	AQEU
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	7	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	18	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	9	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	4	TQEX
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	6	CEUX
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	4	CEUX
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	1	TQEX
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	10	CEUX

109

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	10	CEUX
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	9	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	6	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	5	XCSE
Genmab A/S	02/05/2024	4:47:32 PM	1,952.00	2	XCSE
Genmab A/S	02/05/2024	4:47:35 PM	1,952.00	10	CEUX
Genmab A/S	02/05/2024	4:47:35 PM	1,952.00	5	TQEX
Genmab A/S	02/05/2024	4:47:35 PM	1,952.00	2	TQEX
Genmab A/S	02/05/2024	4:47:35 PM	1,952.00	3	XCSE
Genmab A/S	02/05/2024	4:47:35 PM	1,952.00	9	XCSE
Genmab A/S	02/05/2024	4:48:42 PM	1,953.50	8	AQEU
Genmab A/S	02/05/2024	4:48:46 PM	1,953.50	35	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	9	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	51	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	3	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	6	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	4	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	6	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	8	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	2	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	2	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	4	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	4	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	1	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	26	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	9	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	26	XCSE
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	10	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	5	TQEX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	8	AQEU
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	25	CEUX
Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	16	CEUX

110

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:48:49 PM	1,953.00	8	AQEU
Genmab A/S	02/05/2024	4:48:50 PM	1,952.50	15	XCSE
Genmab A/S	02/05/2024	4:48:50 PM	1,952.50	15	XCSE
Genmab A/S	02/05/2024	4:48:50 PM	1,952.50	15	XCSE
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	5	TQEX
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	16	CEUX
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	16	CEUX
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	16	CEUX
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	3	TQEX
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	8	XCSE
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	1	CEUX
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	2	AQEU
Genmab A/S	02/05/2024	4:48:51 PM	1,952.50	2	TQEX
Genmab A/S	02/05/2024	4:48:52 PM	1,952.50	38	TQEX
Genmab A/S	02/05/2024	4:48:52 PM	1,952.50	4	TQEX
Genmab A/S	02/05/2024	4:48:52 PM	1,952.50	8	AQEU
Genmab A/S	02/05/2024	4:48:52 PM	1,952.50	22	TQEX
Genmab A/S	02/05/2024	4:49:50 PM	1,953.00	85	CEUX
Genmab A/S	02/05/2024	4:49:50 PM	1,953.00	99	CEUX
Genmab A/S	02/05/2024	4:49:50 PM	1,953.00	14	AQEU
Genmab A/S	02/05/2024	4:49:50 PM	1,953.00	11	TQEX
Genmab A/S	02/05/2024	4:49:50 PM	1,953.00	4	TQEX
Genmab A/S	02/05/2024	4:50:26 PM	1,950.50	37	XCSE
Genmab A/S	02/05/2024	4:51:01 PM	1,950.50	23	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	23	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	27	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	17	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	6	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	27	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	22	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	1	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	11	XCSE
Genmab A/S	02/05/2024	4:51:11 PM	1,950.50	16	XCSE
Genmab A/S	02/05/2024	4:51:14 PM	1,950.50	23	XCSE
Genmab A/S	02/05/2024	4:51:20 PM	1,950.50	23	XCSE
Genmab A/S	02/05/2024	4:51:20 PM	1,950.50	25	XCSE
Genmab A/S	02/05/2024	4:51:54 PM	1,951.00	54	CEUX
Genmab A/S	02/05/2024	4:51:54 PM	1,951.00	25	XCSE
Genmab A/S	02/05/2024	4:51:54 PM	1,951.00	35	XCSE
Genmab A/S	02/05/2024	4:52:17 PM	1,951.50	15	XCSE

111

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	02/05/2024	4:52:17 PM	1,951.50	3	XCSE
Genmab A/S	02/05/2024	4:52:18 PM	1,951.50	5	TQEX
Genmab A/S	02/05/2024	4:52:18 PM	1,951.50	15	CEUX
Genmab A/S	02/05/2024	4:52:18 PM	1,951.50	15	XCSE
Genmab A/S	02/05/2024	4:52:27 PM	1,951.50	15	XCSE
Genmab A/S	02/05/2024	4:52:27 PM	1,951.50	2	XCSE
Genmab A/S	02/05/2024	4:52:27 PM	1,951.50	5	TQEX
Genmab A/S	02/05/2024	4:52:27 PM	1,951.50	26	XCSE
Genmab A/S	02/05/2024	4:52:27 PM	1,951.50	18	XCSE
Genmab A/S	02/05/2024	4:52:48 PM	1,952.50	44	CEUX
Genmab A/S	02/05/2024	4:52:48 PM	1,952.50	7	AQEU
Genmab A/S	02/05/2024	4:52:48 PM	1,952.50	7	TQEX
Genmab A/S	02/05/2024	4:52:48 PM	1,952.50	50	XCSE
Genmab A/S	03/05/2024	9:05:58 AM	1,974.00	20	CEUX
Genmab A/S	03/05/2024	9:05:58 AM	1,974.00	2	AQEU
Genmab A/S	03/05/2024	9:05:58 AM	1,974.00	5	TQEX
Genmab A/S	03/05/2024	9:05:58 AM	1,974.00	21	XCSE
Genmab A/S	03/05/2024	9:05:58 AM	1,974.00	23	XCSE
Genmab A/S	03/05/2024	9:07:01 AM	1,980.00	50	XCSE
Genmab A/S	03/05/2024	9:07:01 AM	1,980.00	50	XCSE
Genmab A/S	03/05/2024	9:07:01 AM	1,980.00	8	XCSE
Genmab A/S	03/05/2024	10:37:57 AM	2,008.00	44	XCSE
Genmab A/S	03/05/2024	10:37:57 AM	2,008.00	17	XCSE
Genmab A/S	03/05/2024	10:37:57 AM	2,008.00	25	XCSE
Genmab A/S	03/05/2024	10:37:57 AM	2,007.00	43	CEUX
Genmab A/S	03/05/2024	10:47:09 AM	2,011.00	42	AQEU
Genmab A/S	03/05/2024	10:49:06 AM	2,012.00	24	CEUX
Genmab A/S	03/05/2024	10:49:06 AM	2,012.00	16	CEUX
Genmab A/S	03/05/2024	10:54:37 AM	2,014.00	32	XCSE
Genmab A/S	03/05/2024	11:45:51 AM	2,042.00	9	XCSE
Genmab A/S	03/05/2024	11:45:51 AM	2,042.00	30	XCSE
Genmab A/S	03/05/2024	11:49:01 AM	2,043.00	30	CEUX
Genmab A/S	03/05/2024	11:49:01 AM	2,043.00	6	CEUX
Genmab A/S	03/05/2024	11:51:37 AM	2,044.00	40	CEUX
Genmab A/S	03/05/2024	11:53:00 AM	2,042.00	41	CEUX
Genmab A/S	03/05/2024	11:53:00 AM	2,042.00	11	AQEU
Genmab A/S	03/05/2024	11:53:00 AM	2,042.00	25	AQEU
Genmab A/S	03/05/2024	11:56:10 AM	2,039.00	36	CEUX
Genmab A/S	03/05/2024	12:05:18 PM	2,039.00	10	XCSE
Genmab A/S	03/05/2024	12:05:18 PM	2,039.00	10	XCSE

112

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	03/05/2024	12:10:33 PM	2,042.00	9	XCSE
Genmab A/S	03/05/2024	12:11:50 PM	2,043.00	41	CEUX
Genmab A/S	03/05/2024	12:14:37 PM	2,043.00	41	XCSE
Genmab A/S	03/05/2024	12:29:17 PM	2,062.00	63	XCSE
Genmab A/S	03/05/2024	12:33:07 PM	2,058.00	39	XCSE
Genmab A/S	03/05/2024	12:33:19 PM	2,056.00	37	CEUX
Genmab A/S	03/05/2024	12:33:20 PM	2,055.00	17	CEUX
Genmab A/S	03/05/2024	12:33:20 PM	2,055.00	21	CEUX
Genmab A/S	03/05/2024	12:40:31 PM	2,045.00	33	CEUX
Genmab A/S	03/05/2024	12:40:31 PM	2,045.00	8	CEUX
Genmab A/S	03/05/2024	12:44:22 PM	2,043.00	2	XCSE
Genmab A/S	03/05/2024	12:44:22 PM	2,043.00	33	XCSE
Genmab A/S	03/05/2024	12:44:22 PM	2,042.00	25	XCSE
Genmab A/S	03/05/2024	12:48:48 PM	2,040.00	36	XCSE
Genmab A/S	03/05/2024	12:54:31 PM	2,039.00	39	CEUX
Genmab A/S	03/05/2024	12:58:26 PM	2,040.00	36	AQEU
Genmab A/S	03/05/2024	12:58:26 PM	2,039.00	28	XCSE
Genmab A/S	03/05/2024	12:58:26 PM	2,039.00	8	XCSE
Genmab A/S	03/05/2024	1:02:22 PM	2,037.00	10	XCSE
Genmab A/S	03/05/2024	1:02:50 PM	2,033.00	38	XCSE
Genmab A/S	03/05/2024	1:05:17 PM	2,030.00	14	XCSE
Genmab A/S	03/05/2024	1:06:40 PM	2,034.00	4	XCSE
Genmab A/S	03/05/2024	1:07:05 PM	2,036.00	22	XCSE
Genmab A/S	03/05/2024	1:07:05 PM	2,036.00	16	XCSE
Genmab A/S	03/05/2024	1:09:19 PM	2,038.00	10	CEUX
Genmab A/S	03/05/2024	1:09:19 PM	2,038.00	11	CEUX
Genmab A/S	03/05/2024	1:09:19 PM	2,038.00	6	CEUX
Genmab A/S	03/05/2024	1:16:14 PM	2,040.00	36	CEUX
Genmab A/S	03/05/2024	1:19:00 PM	2,042.00	21	CEUX
Genmab A/S	03/05/2024	1:19:00 PM	2,042.00	16	CEUX
Genmab A/S	03/05/2024	1:19:10 PM	2,040.00	42	CEUX
Genmab A/S	03/05/2024	1:19:11 PM	2,039.00	36	XCSE
Genmab A/S	03/05/2024	1:31:01 PM	2,043.00	85	XCSE
Genmab A/S	03/05/2024	1:31:47 PM	2,044.00	38	XCSE
Genmab A/S	03/05/2024	1:37:57 PM	2,042.00	40	CEUX
Genmab A/S	03/05/2024	1:37:57 PM	2,042.00	37	XCSE
Genmab A/S	03/05/2024	1:48:23 PM	2,040.00	40	XCSE
Genmab A/S	03/05/2024	1:50:31 PM	2,044.00	38	CEUX
Genmab A/S	03/05/2024	1:50:32 PM	2,043.00	36	XCSE
Genmab A/S	03/05/2024	1:56:40 PM	2,044.00	30	XCSE

113

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	03/05/2024	1:56:40 PM	2,044.00	9	XCSE
Genmab A/S	03/05/2024	1:59:57 PM	2,042.00	35	XCSE
Genmab A/S	03/05/2024	2:02:10 PM	2,042.00	37	CEUX
Genmab A/S	03/05/2024	2:03:21 PM	2,042.00	37	XCSE
Genmab A/S	03/05/2024	2:08:00 PM	2,038.00	37	XCSE
Genmab A/S	03/05/2024	2:08:07 PM	2,037.00	16	XCSE
Genmab A/S	03/05/2024	2:12:14 PM	2,037.00	36	CEUX
Genmab A/S	03/05/2024	2:17:25 PM	2,042.00	35	CEUX
Genmab A/S	03/05/2024	2:17:25 PM	2,041.00	48	XCSE
Genmab A/S	03/05/2024	2:22:11 PM	2,043.00	72	CEUX
Genmab A/S	03/05/2024	2:22:11 PM	2,043.00	18	CEUX
Genmab A/S	03/05/2024	2:26:42 PM	2,044.00	39	XCSE
Genmab A/S	03/05/2024	2:26:56 PM	2,041.00	50	CEUX
Genmab A/S	03/05/2024	2:32:20 PM	2,046.00	33	XCSE
Genmab A/S	03/05/2024	2:36:44 PM	2,056.00	45	CEUX
Genmab A/S	03/05/2024	2:36:44 PM	2,053.00	35	XCSE
Genmab A/S	03/05/2024	2:36:44 PM	2,054.00	42	XCSE
Genmab A/S	03/05/2024	2:45:36 PM	2,056.00	39	XCSE
Genmab A/S	03/05/2024	2:47:30 PM	2,055.00	36	XCSE
Genmab A/S	03/05/2024	2:51:53 PM	2,056.00	29	XCSE
Genmab A/S	03/05/2024	2:51:53 PM	2,056.00	7	XCSE
Genmab A/S	03/05/2024	2:52:30 PM	2,055.00	42	CEUX
Genmab A/S	03/05/2024	2:55:33 PM	2,055.00	41	XCSE
Genmab A/S	03/05/2024	2:58:50 PM	2,057.00	15	XCSE
Genmab A/S	03/05/2024	2:58:50 PM	2,057.00	22	XCSE
Genmab A/S	03/05/2024	2:58:51 PM	2,056.00	35	CEUX
Genmab A/S	03/05/2024	2:58:51 PM	2,056.00	20	CEUX
Genmab A/S	03/05/2024	2:58:51 PM	2,056.00	17	CEUX
Genmab A/S	03/05/2024	3:03:26 PM	2,055.00	38	XCSE
Genmab A/S	03/05/2024	3:06:43 PM	2,053.00	11	XCSE
Genmab A/S	03/05/2024	3:08:44 PM	2,056.00	6	XCSE
Genmab A/S	03/05/2024	3:08:44 PM	2,056.00	34	XCSE
Genmab A/S	03/05/2024	3:09:01 PM	2,054.00	38	XCSE
Genmab A/S	03/05/2024	3:09:02 PM	2,053.00	36	XCSE
Genmab A/S	03/05/2024	3:16:08 PM	2,054.00	36	CEUX
Genmab A/S	03/05/2024	3:19:05 PM	2,055.00	35	XCSE
Genmab A/S	03/05/2024	3:19:47 PM	2,055.00	36	XCSE
Genmab A/S	03/05/2024	3:20:01 PM	2,053.00	40	CEUX
Genmab A/S	03/05/2024	3:20:49 PM	2,053.00	38	CEUX
Genmab A/S	03/05/2024	3:29:25 PM	2,051.00	49	XCSE

114

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	03/05/2024	3:30:10 PM	2,063.00	45	XCSE
Genmab A/S	03/05/2024	3:33:08 PM	2,061.00	52	XCSE
Genmab A/S	03/05/2024	3:33:08 PM	2,061.00	54	CEUX
Genmab A/S	03/05/2024	3:33:08 PM	2,061.00	1	XCSE
Genmab A/S	03/05/2024	3:34:13 PM	2,056.00	54	XCSE
Genmab A/S	03/05/2024	3:37:12 PM	2,055.00	44	CEUX
Genmab A/S	03/05/2024	3:37:14 PM	2,054.00	45	XCSE
Genmab A/S	03/05/2024	3:37:14 PM	2,054.00	45	CEUX
Genmab A/S	03/05/2024	3:40:02 PM	2,051.00	38	XCSE
Genmab A/S	03/05/2024	3:44:45 PM	2,058.00	45	CEUX
Genmab A/S	03/05/2024	3:45:52 PM	2,058.00	44	CEUX
Genmab A/S	03/05/2024	3:47:22 PM	2,058.00	58	XCSE
Genmab A/S	03/05/2024	3:47:22 PM	2,058.00	52	CEUX
Genmab A/S	03/05/2024	3:47:22 PM	2,058.00	8	AQEU
Genmab A/S	03/05/2024	3:47:22 PM	2,058.00	8	TQEX
Genmab A/S	03/05/2024	3:48:22 PM	2,057.00	41	CEUX
Genmab A/S	03/05/2024	3:53:55 PM	2,065.00	40	XCSE
Genmab A/S	03/05/2024	3:55:44 PM	2,064.00	41	CEUX
Genmab A/S	03/05/2024	3:55:44 PM	2,063.00	40	CEUX
Genmab A/S	03/05/2024	3:56:25 PM	2,060.00	42	CEUX
Genmab A/S	03/05/2024	4:01:50 PM	2,054.00	39	XCSE
Genmab A/S	03/05/2024	4:03:07 PM	2,051.00	2	CEUX
Genmab A/S	03/05/2024	4:03:07 PM	2,051.00	4	CEUX
Genmab A/S	03/05/2024	4:04:02 PM	2,055.00	41	CEUX
Genmab A/S	03/05/2024	4:04:02 PM	2,055.00	7	CEUX
Genmab A/S	03/05/2024	4:06:08 PM	2,055.00	47	CEUX
Genmab A/S	03/05/2024	4:07:34 PM	2,054.00	48	XCSE
Genmab A/S	03/05/2024	4:07:48 PM	2,052.00	19	CEUX
Genmab A/S	03/05/2024	4:11:26 PM	2,053.00	45	CEUX
Genmab A/S	03/05/2024	4:11:26 PM	2,053.00	2	CEUX
Genmab A/S	03/05/2024	4:11:26 PM	2,053.00	47	CEUX
Genmab A/S	03/05/2024	4:11:26 PM	2,051.00	3	CEUX
Genmab A/S	03/05/2024	4:13:07 PM	2,049.00	48	CEUX
Genmab A/S	03/05/2024	4:15:29 PM	2,050.00	43	XCSE
Genmab A/S	03/05/2024	4:16:31 PM	2,050.00	39	CEUX
Genmab A/S	03/05/2024	4:18:29 PM	2,047.00	40	XCSE
Genmab A/S	03/05/2024	4:18:29 PM	2,046.00	9	AQEU
Genmab A/S	03/05/2024	4:18:29 PM	2,046.00	29	AQEU
Genmab A/S	03/05/2024	4:18:29 PM	2,045.00	39	XCSE
Genmab A/S	03/05/2024	4:18:29 PM	2,045.00	40	TQEX

115

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	03/05/2024	4:22:35 PM	2,044.00	41	CEUX
Genmab A/S	03/05/2024	4:22:35 PM	2,044.00	7	CEUX
Genmab A/S	03/05/2024	4:24:09 PM	2,045.00	10	XCSE
Genmab A/S	03/05/2024	4:24:10 PM	2,045.00	42	XCSE
Genmab A/S	03/05/2024	4:29:46 PM	2,044.00	58	XCSE
Genmab A/S	03/05/2024	4:29:46 PM	2,043.00	56	TQEX
Genmab A/S	03/05/2024	4:29:46 PM	2,042.00	40	CEUX
Genmab A/S	03/05/2024	4:29:46 PM	2,042.00	2	CEUX
Genmab A/S	03/05/2024	4:29:46 PM	2,042.00	9	CEUX
Genmab A/S	03/05/2024	4:29:46 PM	2,042.00	57	CEUX
Genmab A/S	03/05/2024	4:35:50 PM	2,047.00	36	CEUX
Genmab A/S	03/05/2024	4:35:50 PM	2,047.00	34	CEUX
Genmab A/S	03/05/2024	4:38:23 PM	2,051.00	22	CEUX
Genmab A/S	03/05/2024	4:38:23 PM	2,051.00	22	CEUX
Genmab A/S	03/05/2024	4:38:23 PM	2,051.00	22	CEUX
Genmab A/S	03/05/2024	4:38:23 PM	2,051.00	9	CEUX
Genmab A/S	03/05/2024	4:40:44 PM	2,052.00	21	CEUX
Genmab A/S	03/05/2024	4:40:44 PM	2,052.00	16	CEUX
Genmab A/S	03/05/2024	4:40:44 PM	2,052.00	5	CEUX
Genmab A/S	03/05/2024	4:40:44 PM	2,052.00	21	CEUX
Genmab A/S	03/05/2024	4:40:44 PM	2,052.00	10	CEUX
Genmab A/S	03/05/2024	4:40:44 PM	2,051.00	16	TQEX
Genmab A/S	03/05/2024	4:43:37 PM	2,054.00	5	XCSE
Genmab A/S	03/05/2024	4:43:52 PM	2,055.00	69	XCSE
Genmab A/S	03/05/2024	4:43:52 PM	2,055.00	47	CEUX
Genmab A/S	03/05/2024	4:43:52 PM	2,055.00	11	CEUX
Genmab A/S	03/05/2024	4:43:52 PM	2,055.00	3	CEUX
Genmab A/S	03/05/2024	4:43:52 PM	2,055.00	9	AQEU
Genmab A/S	03/05/2024	4:43:52 PM	2,055.00	10	TQEX
Genmab A/S	03/05/2024	4:45:29 PM	2,055.00	23	XCSE
Genmab A/S	03/05/2024	4:45:29 PM	2,055.00	23	XCSE
Genmab A/S	03/05/2024	4:45:29 PM	2,055.00	5	XCSE
Genmab A/S	03/05/2024	4:45:30 PM	2,055.00	13	XCSE
Genmab A/S	03/05/2024	4:45:30 PM	2,055.00	7	XCSE
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	26	XCSE
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	26	XCSE
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	10	XCSE
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	9	XCSE
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	6	CEUX
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	16	CEUX

116

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 29 – May 3, 2024

Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	6	CEUX
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	16	CEUX
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	6	CEUX
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	10	CEUX
Genmab A/S	03/05/2024	4:47:33 PM	2,054.00	8	CEUX
Genmab A/S	03/05/2024	4:49:32 PM	2,052.00	6	XCSE
Genmab A/S	03/05/2024	4:49:32 PM	2,052.00	45	XCSE
Genmab A/S	03/05/2024	4:49:32 PM	2,052.00	1	AQEU
Genmab A/S	03/05/2024	4:49:32 PM	2,052.00	1	XCSE
Genmab A/S	03/05/2024	4:51:09 PM	2,053.00	53	XCSE
Genmab A/S	03/05/2024	4:51:09 PM	2,053.00	23	XCSE
Genmab A/S	03/05/2024	4:51:09 PM	2,053.00	30	XCSE
Genmab A/S	03/05/2024	4:51:09 PM	2,053.00	1	XCSE
Genmab A/S	03/05/2024	4:51:09 PM	2,053.00	11	AQEU
Genmab A/S	03/05/2024	4:51:09 PM	2,053.00	36	CEUX

117