Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

Issuer	Date	Time CET	Quantity	Price (DKK)	Venue
GENMAB A/S	03-Apr-2025	09:26:59 AM	71	1281.50	CEUX
GENMAB A/S	03-Apr-2025	09:26:59 AM	8	1281.50	CEUX
GENMAB A/S	03-Apr-2025	09:27:15 AM	21	1282.00	AQEU
GENMAB A/S	03-Apr-2025	09:27:15 AM	55	1282.00	AQEU
GENMAB A/S	03-Apr-2025	09:27:19 AM	19	1281.00	XCSE
GENMAB A/S	03-Apr-2025	09:27:19 AM	29	1281.00	XCSE
GENMAB A/S	03-Apr-2025	09:27:19 AM	76	1281.50	TQEX
GENMAB A/S	03-Apr-2025	09:27:19 AM	72	1281.00	AQEU
GENMAB A/S	03-Apr-2025	09:27:33 AM	27	1281.00	XCSE
GENMAB A/S	03-Apr-2025	09:27:41 AM	46	1280.00	XCSE
GENMAB A/S	03-Apr-2025	09:27:41 AM	24	1280.00	XCSE
GENMAB A/S	03-Apr-2025	09:27:41 AM	80	1280.50	TQEX
GENMAB A/S	03-Apr-2025	09:27:41 AM	78	1280.50	CEUX
GENMAB A/S	03-Apr-2025	09:27:44 AM	57	1279.50	AQEU
GENMAB A/S	03-Apr-2025	09:27:57 AM	4	1280.50	CEUX
GENMAB A/S	03-Apr-2025	09:28:07 AM	20	1281.00	TQEX
GENMAB A/S	03-Apr-2025	09:28:13 AM	52	1281.00	XCSE
GENMAB A/S	03-Apr-2025	09:28:14 AM	4	1281.00	TQEX
GENMAB A/S	03-Apr-2025	09:28:32 AM	65	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:28:32 AM	17	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:28:32 AM	24	1283.50	TQEX
GENMAB A/S	03-Apr-2025	09:28:32 AM	88	1283.50	CEUX
GENMAB A/S	03-Apr-2025	09:29:56 AM	85	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:29:56 AM	17	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:29:56 AM	23	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:29:56 AM	30	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:29:56 AM	30	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:29:56 AM	11	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:29:56 AM	86	1284.50	CEUX
GENMAB A/S	03-Apr-2025	09:29:56 AM	37	1283.50	CEUX
GENMAB A/S	03-Apr-2025	09:30:08 AM	21	1284.50	CEUX
GENMAB A/S	03-Apr-2025	09:31:10 AM	17	1285.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:10 AM	20	1285.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:10 AM	21	1284.50	CEUX
GENMAB A/S	03-Apr-2025	09:31:20 AM	86	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:20 AM	17	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:31:20 AM	19	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:31:20 AM	38	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:20 AM	4	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:20 AM	87	1283.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:20 AM	25	1283.00	TQEX
GENMAB A/S	03-Apr-2025	09:31:20 AM	10	1284.50	CEUX
GENMAB A/S	03-Apr-2025	09:31:20 AM	44	1283.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	09:31:23 AM	56	1283.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:23 AM	29	1283.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:23 AM	25	1283.00	TQEX
GENMAB A/S	03-Apr-2025	09:31:23 AM	68	1282.50	CEUX
GENMAB A/S	03-Apr-2025	09:31:23 AM	19	1282.50	CEUX
GENMAB A/S	03-Apr-2025	09:31:24 AM	26	1282.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:24 AM	13	1282.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:24 AM	44	1282.00	XCSE
GENMAB A/S	03-Apr-2025	09:31:24 AM	25	1282.00	TQEX
GENMAB A/S	03-Apr-2025	09:31:24 AM	25	1282.00	CEUX
GENMAB A/S	03-Apr-2025	09:32:06 AM	34	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:32:14 AM	71	1282.50	XCSE
GENMAB A/S	03-Apr-2025	09:32:14 AM	12	1282.00	CEUX
GENMAB A/S	03-Apr-2025	09:33:32 AM	88	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:33:32 AM	20	1283.50	AQEU
GENMAB A/S	03-Apr-2025	09:33:32 AM	7	1283.50	AQEU
GENMAB A/S	03-Apr-2025	09:34:19 AM	24	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:34:24 AM	83	1282.50	XCSE
GENMAB A/S	03-Apr-2025	09:34:24 AM	28	1282.50	TQEX
GENMAB A/S	03-Apr-2025	09:34:25 AM	14	1282.00	CEUX
GENMAB A/S	03-Apr-2025	09:34:25 AM	33	1282.00	AQEU
GENMAB A/S	03-Apr-2025	09:34:29 AM	40	1281.50	XCSE
GENMAB A/S	03-Apr-2025	09:34:30 AM	4	1281.50	XCSE
GENMAB A/S	03-Apr-2025	09:34:30 AM	11	1281.50	XCSE
GENMAB A/S	03-Apr-2025	09:35:31 AM	24	1284.00	AQEU
GENMAB A/S	03-Apr-2025	09:35:59 AM	4	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:35:59 AM	6	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:35:59 AM	10	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:35:59 AM	30	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:36:05 AM	86	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:36:30 AM	86	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:36:30 AM	26	1284.00	TQEX
GENMAB A/S	03-Apr-2025	09:36:30 AM	86	1284.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:30 AM	74	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:30 AM	38	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:30 AM	14	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:30 AM	2	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:31 AM	85	1282.00	XCSE
GENMAB A/S	03-Apr-2025	09:36:31 AM	15	1282.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:31 AM	33	1282.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:31 AM	16	1282.00	CEUX
GENMAB A/S	03-Apr-2025	09:36:31 AM	8	1282.00	AQEU
GENMAB A/S	03-Apr-2025	09:36:31 AM	18	1282.00	AQEU
GENMAB A/S	03-Apr-2025	09:37:00 AM	18	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:37:00 AM	21	1284.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	09:37:01 AM	18	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:37:12 AM	12	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:37:33 AM	9	1286.50	TQEX
GENMAB A/S	03-Apr-2025	09:37:33 AM	15	1286.50	TQEX
GENMAB A/S	03-Apr-2025	09:37:46 AM	31	1286.00	CEUX
GENMAB A/S	03-Apr-2025	09:38:09 AM	81	1285.50	XCSE
GENMAB A/S	03-Apr-2025	09:38:09 AM	32	1285.00	CEUX
GENMAB A/S	03-Apr-2025	09:38:09 AM	24	1285.50	AQEU
GENMAB A/S	03-Apr-2025	09:38:46 AM	88	1285.50	XCSE
GENMAB A/S	03-Apr-2025	09:38:58 AM	13	1284.50	XCSE
GENMAB A/S	03-Apr-2025	09:39:00 AM	20	1284.00	CEUX
GENMAB A/S	03-Apr-2025	09:39:00 AM	10	1284.00	CEUX
GENMAB A/S	03-Apr-2025	09:39:01 AM	12	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:39:01 AM	75	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:39:01 AM	15	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:39:03 AM	15	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:40:02 AM	88	1282.00	XCSE
GENMAB A/S	03-Apr-2025	09:40:02 AM	24	1281.00	TQEX
GENMAB A/S	03-Apr-2025	09:40:02 AM	27	1281.50	CEUX
GENMAB A/S	03-Apr-2025	09:40:02 AM	24	1281.00	AQEU
GENMAB A/S	03-Apr-2025	09:40:04 AM	47	1280.50	XCSE
GENMAB A/S	03-Apr-2025	09:40:04 AM	34	1280.50	XCSE
GENMAB A/S	03-Apr-2025	09:40:05 AM	24	1280.00	CEUX
GENMAB A/S	03-Apr-2025	09:42:01 AM	86	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:42:01 AM	46	1284.00	CEUX
GENMAB A/S	03-Apr-2025	09:42:07 AM	47	1283.50	TQEX
GENMAB A/S	03-Apr-2025	09:42:37 AM	85	1283.00	XCSE
GENMAB A/S	03-Apr-2025	09:42:37 AM	49	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:42:37 AM	20	1283.00	AQEU
GENMAB A/S	03-Apr-2025	09:44:06 AM	83	1284.00	XCSE
GENMAB A/S	03-Apr-2025	09:44:06 AM	64	1284.00	CEUX
GENMAB A/S	03-Apr-2025	09:45:09 AM	83	1285.00	XCSE
GENMAB A/S	03-Apr-2025	09:45:09 AM	7	1285.00	CEUX
GENMAB A/S	03-Apr-2025	09:45:09 AM	36	1285.00	CEUX
GENMAB A/S	03-Apr-2025	09:45:09 AM	25	1285.00	AQEU
GENMAB A/S	03-Apr-2025	09:46:27 AM	62	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:46:53 AM	28	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:46:53 AM	30	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:46:53 AM	20	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:46:53 AM	33	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:46:54 AM	19	1288.50	TQEX
GENMAB A/S	03-Apr-2025	09:46:54 AM	7	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:46:54 AM	24	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:47:09 AM	13	1288.50	XCSE
GENMAB A/S	03-Apr-2025	09:47:09 AM	30	1288.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	09:47:25 AM	81	1288.00	XCSE
GENMAB A/S	03-Apr-2025	09:47:25 AM	2	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:47:27 AM	11	1287.00	XCSE
GENMAB A/S	03-Apr-2025	09:47:27 AM	49	1287.00	XCSE
GENMAB A/S	03-Apr-2025	09:47:27 AM	28	1287.00	XCSE
GENMAB A/S	03-Apr-2025	09:47:27 AM	53	1287.00	CEUX
GENMAB A/S	03-Apr-2025	09:48:25 AM	39	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:48:28 AM	15	1287.50	AQEU
GENMAB A/S	03-Apr-2025	09:48:32 AM	3	1288.50	XCSE
GENMAB A/S	03-Apr-2025	09:49:02 AM	37	1288.50	XCSE
GENMAB A/S	03-Apr-2025	09:49:02 AM	46	1288.50	XCSE
GENMAB A/S	03-Apr-2025	09:49:02 AM	35	1289.00	CEUX
GENMAB A/S	03-Apr-2025	09:49:05 AM	37	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:49:05 AM	11	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:49:20 AM	26	1287.50	TQEX
GENMAB A/S	03-Apr-2025	09:49:30 AM	15	1287.00	XCSE
GENMAB A/S	03-Apr-2025	09:49:30 AM	73	1287.00	XCSE
GENMAB A/S	03-Apr-2025	09:49:30 AM	24	1287.00	CEUX
GENMAB A/S	03-Apr-2025	09:49:41 AM	27	1287.00	CEUX
GENMAB A/S	03-Apr-2025	09:49:47 AM	20	1286.50	AQEU
GENMAB A/S	03-Apr-2025	09:50:01 AM	37	1286.00	XCSE
GENMAB A/S	03-Apr-2025	09:50:17 AM	45	1286.00	XCSE
GENMAB A/S	03-Apr-2025	09:51:54 AM	83	1286.00	XCSE
GENMAB A/S	03-Apr-2025	09:51:54 AM	31	1286.50	CEUX
GENMAB A/S	03-Apr-2025	09:52:41 AM	8	1286.00	XCSE
GENMAB A/S	03-Apr-2025	09:52:41 AM	18	1286.00	XCSE
GENMAB A/S	03-Apr-2025	09:53:00 AM	83	1285.00	XCSE
GENMAB A/S	03-Apr-2025	09:53:00 AM	27	1285.50	XCSE
GENMAB A/S	03-Apr-2025	09:53:00 AM	24	1285.50	TQEX
GENMAB A/S	03-Apr-2025	09:53:00 AM	24	1285.50	CEUX
GENMAB A/S	03-Apr-2025	09:53:03 AM	24	1284.00	CEUX
GENMAB A/S	03-Apr-2025	09:53:07 AM	28	1284.00	AQEU
GENMAB A/S	03-Apr-2025	09:53:26 AM	84	1283.50	XCSE
GENMAB A/S	03-Apr-2025	09:53:28 AM	29	1283.00	CEUX
GENMAB A/S	03-Apr-2025	09:53:29 AM	20	1282.50	XCSE
GENMAB A/S	03-Apr-2025	09:53:29 AM	62	1282.50	XCSE
GENMAB A/S	03-Apr-2025	09:53:29 AM	20	1282.50	CEUX
GENMAB A/S	03-Apr-2025	09:56:26 AM	81	1285.50	XCSE
GENMAB A/S	03-Apr-2025	09:56:26 AM	33	1285.50	TQEX
GENMAB A/S	03-Apr-2025	09:56:26 AM	43	1285.50	CEUX
GENMAB A/S	03-Apr-2025	09:56:26 AM	21	1285.50	CEUX
GENMAB A/S	03-Apr-2025	09:57:47 AM	44	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:57:47 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:57:47 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:57:47 AM	22	1289.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	09:57:47 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:57:47 AM	11	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:57:47 AM	22	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:58:48 AM	85	1289.00	XCSE
GENMAB A/S	03-Apr-2025	09:58:48 AM	31	1288.00	TQEX
GENMAB A/S	03-Apr-2025	09:58:48 AM	72	1289.00	CEUX
GENMAB A/S	03-Apr-2025	09:58:48 AM	53	1288.00	CEUX
GENMAB A/S	03-Apr-2025	09:58:48 AM	26	1289.00	AQEU
GENMAB A/S	03-Apr-2025	09:58:48 AM	27	1288.00	AQEU
GENMAB A/S	03-Apr-2025	09:58:51 AM	82	1288.00	XCSE
GENMAB A/S	03-Apr-2025	09:59:24 AM	13	1288.00	CEUX
GENMAB A/S	03-Apr-2025	10:00:25 AM	38	1287.50	XCSE
GENMAB A/S	03-Apr-2025	10:00:28 AM	84	1286.50	XCSE
GENMAB A/S	03-Apr-2025	10:00:28 AM	74	1286.50	CEUX
GENMAB A/S	03-Apr-2025	10:02:27 AM	6	1287.50	CEUX
GENMAB A/S	03-Apr-2025	10:02:27 AM	43	1287.50	CEUX
GENMAB A/S	03-Apr-2025	10:02:27 AM	26	1287.50	CEUX
GENMAB A/S	03-Apr-2025	10:02:35 AM	15	1288.00	XCSE
GENMAB A/S	03-Apr-2025	10:03:37 AM	25	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:03:38 AM	45	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:03:38 AM	2	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	86	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	87	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	38	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	30	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	7	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	7	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	29	1289.50	XCSE
GENMAB A/S	03-Apr-2025	10:04:24 AM	3	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:04:24 AM	25	1289.00	TQEX
GENMAB A/S	03-Apr-2025	10:04:24 AM	72	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:04:24 AM	69	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:04:24 AM	63	1288.50	CEUX
GENMAB A/S	03-Apr-2025	10:04:24 AM	25	1290.00	AQEU
GENMAB A/S	03-Apr-2025	10:04:24 AM	24	1289.00	AQEU
GENMAB A/S	03-Apr-2025	10:04:25 AM	62	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:04:25 AM	19	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:04:25 AM	7	1288.50	CEUX
GENMAB A/S	03-Apr-2025	10:05:16 AM	9	1289.50	XCSE
GENMAB A/S	03-Apr-2025	10:05:35 AM	77	1289.50	XCSE
GENMAB A/S	03-Apr-2025	10:05:35 AM	26	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:05:59 AM	16	1291.00	TQEX
GENMAB A/S	03-Apr-2025	10:05:59 AM	33	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:06:02 AM	61	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:06:58 AM	5	1292.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	10:06:58 AM	29	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:06:58 AM	5	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:07:32 AM	6	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	86	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	25	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	23	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	38	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	25	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	25	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:14 AM	11	1292.00	CEUX
GENMAB A/S	03-Apr-2025	10:08:14 AM	39	1292.00	CEUX
GENMAB A/S	03-Apr-2025	10:08:14 AM	24	1292.00	AQEU
GENMAB A/S	03-Apr-2025	10:08:17 AM	25	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:17 AM	6	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:23 AM	28	1291.00	CEUX
GENMAB A/S	03-Apr-2025	10:08:28 AM	13	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:08:49 AM	8	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:08:51 AM	22	1291.00	TQEX
GENMAB A/S	03-Apr-2025	10:09:21 AM	50	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:09:21 AM	30	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:09:23 AM	25	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:09:29 AM	55	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:09:29 AM	32	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:10:26 AM	86	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:10:26 AM	35	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:10:26 AM	46	1289.50	AQEU
GENMAB A/S	03-Apr-2025	10:11:28 AM	37	1288.50	CEUX
GENMAB A/S	03-Apr-2025	10:12:27 AM	24	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:12:27 AM	18	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:12:27 AM	36	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:12:28 AM	12	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:12:28 AM	21	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:12:28 AM	17	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:12:28 AM	7	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:12:41 AM	10	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:12:41 AM	20	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:12:41 AM	51	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:13:58 AM	1	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:14:03 AM	18	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:14:10 AM	86	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:14:10 AM	76	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:14:11 AM	3	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:14:11 AM	28	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:14:15 AM	86	1289.50	XCSE
GENMAB A/S	03-Apr-2025	10:14:15 AM	53	1289.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	10:16:15 AM	24	1291.00	TQEX
GENMAB A/S	03-Apr-2025	10:16:21 AM	14	1291.50	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	18	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	2	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	20	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	10	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	12	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	15	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	11	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	38	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	11	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	4	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:26 AM	4	1292.00	XCSE
GENMAB A/S	03-Apr-2025	10:16:29 AM	86	1291.50	XCSE
GENMAB A/S	03-Apr-2025	10:16:29 AM	11	1291.50	CEUX
GENMAB A/S	03-Apr-2025	10:16:29 AM	26	1291.50	CEUX
GENMAB A/S	03-Apr-2025	10:16:29 AM	27	1291.50	CEUX
GENMAB A/S	03-Apr-2025	10:17:29 AM	24	1291.00	AQEU
GENMAB A/S	03-Apr-2025	10:18:27 AM	87	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:18:27 AM	8	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:18:27 AM	15	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:18:27 AM	60	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:18:27 AM	28	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:18:27 AM	60	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:19:30 AM	32	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:19:30 AM	52	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:20:42 AM	24	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:20:45 AM	5	1290.00	AQEU
GENMAB A/S	03-Apr-2025	10:20:45 AM	1	1290.00	AQEU
GENMAB A/S	03-Apr-2025	10:20:46 AM	14	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:46 AM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:46 AM	46	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:46 AM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:46 AM	18	1290.00	AQEU
GENMAB A/S	03-Apr-2025	10:20:47 AM	10	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:47 AM	17	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:59 AM	24	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:59 AM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:20:59 AM	54	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:22:14 AM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:22:14 AM	2	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:22:14 AM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:22:14 AM	46	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:22:14 AM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:22:14 AM	84	1289.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	10:22:14 AM	24	1289.00	AQEU
GENMAB A/S	03-Apr-2025	10:22:14 AM	49	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:23:13 AM	24	1288.50	TQEX
GENMAB A/S	03-Apr-2025	10:25:02 AM	46	1289.00	AQEU
GENMAB A/S	03-Apr-2025	10:27:53 AM	13	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:27:53 AM	60	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:27:53 AM	50	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:27:53 AM	37	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:27:53 AM	33	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:27:53 AM	78	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:27:53 AM	5	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:30:05 AM	86	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:30:19 AM	23	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:30:19 AM	7	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:30:19 AM	14	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:30:19 AM	38	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:30:19 AM	12	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:30:20 AM	8	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:31:10 AM	10	1291.50	AQEU
GENMAB A/S	03-Apr-2025	10:31:10 AM	7	1291.50	TQEX
GENMAB A/S	03-Apr-2025	10:31:10 AM	20	1291.50	TQEX
GENMAB A/S	03-Apr-2025	10:33:25 AM	20	1291.50	XCSE
GENMAB A/S	03-Apr-2025	10:33:32 AM	87	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:33:32 AM	31	1291.50	AQEU
GENMAB A/S	03-Apr-2025	10:33:32 AM	8	1291.50	TQEX
GENMAB A/S	03-Apr-2025	10:33:32 AM	22	1291.50	TQEX
GENMAB A/S	03-Apr-2025	10:33:32 AM	36	1291.50	CEUX
GENMAB A/S	03-Apr-2025	10:33:32 AM	3	1291.50	CEUX
GENMAB A/S	03-Apr-2025	10:33:32 AM	25	1291.50	CEUX
GENMAB A/S	03-Apr-2025	10:33:32 AM	88	1291.00	CEUX
GENMAB A/S	03-Apr-2025	10:33:37 AM	19	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:34:27 AM	12	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:34:27 AM	81	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:34:27 AM	32	1290.50	CEUX
GENMAB A/S	03-Apr-2025	10:34:54 AM	8	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:34:54 AM	22	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:34:54 AM	26	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:34:55 AM	14	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:34:55 AM	22	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:34:55 AM	22	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:34:56 AM	23	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:35:40 AM	3	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:36:45 AM	24	1290.00	TQEX
GENMAB A/S	03-Apr-2025	10:36:45 AM	20	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:36:45 AM	47	1289.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	10:36:45 AM	35	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:38:19 AM	85	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:38:24 AM	9	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:38:24 AM	15	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:38:55 AM	6	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:39:57 AM	15	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:39:57 AM	15	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:40:01 AM	12	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:40:04 AM	21	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:40:04 AM	14	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:40:04 AM	3	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:40:04 AM	3	1290.50	XCSE
GENMAB A/S	03-Apr-2025	10:40:18 AM	27	1290.00	AQEU
GENMAB A/S	03-Apr-2025	10:40:18 AM	36	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:40:30 AM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:30 AM	38	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:30 AM	38	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:30 AM	11	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:30 AM	24	1289.50	TQEX
GENMAB A/S	03-Apr-2025	10:40:30 AM	24	1289.00	AQEU
GENMAB A/S	03-Apr-2025	10:40:30 AM	84	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:40:30 AM	32	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:40:35 AM	60	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:35 AM	14	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:35 AM	19	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:40:35 AM	20	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	16	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	38	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	30	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	27	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	20	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	10	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	33	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:41 AM	36	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	11	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	38	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	38	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	5	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:42 AM	15	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:45 AM	7	1289.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	10:41:45 AM	15	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:46 AM	35	1288.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:46 AM	47	1288.00	XCSE
GENMAB A/S	03-Apr-2025	10:41:46 AM	34	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:41:46 AM	32	1288.00	CEUX
GENMAB A/S	03-Apr-2025	10:42:54 AM	14	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:42:54 AM	4	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:42:54 AM	4	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:45:01 AM	12	1289.50	XCSE
GENMAB A/S	03-Apr-2025	10:45:01 AM	59	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:45:01 AM	36	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:45:01 AM	25	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:45:15 AM	7	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:45:15 AM	50	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:45:15 AM	38	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:45:15 AM	14	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:45:15 AM	2	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	12	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	12	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	12	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:46:09 AM	32	1289.50	CEUX
GENMAB A/S	03-Apr-2025	10:46:11 AM	46	1289.00	TQEX
GENMAB A/S	03-Apr-2025	10:46:11 AM	83	1289.00	CEUX
GENMAB A/S	03-Apr-2025	10:46:49 AM	21	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:46:58 AM	20	1288.50	XCSE
GENMAB A/S	03-Apr-2025	10:47:25 AM	12	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:47:41 AM	8	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:48:33 AM	84	1291.00	XCSE
GENMAB A/S	03-Apr-2025	10:48:33 AM	87	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:48:33 AM	80	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:48:33 AM	8	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:48:33 AM	44	1290.50	TQEX
GENMAB A/S	03-Apr-2025	10:48:33 AM	35	1290.00	AQEU
GENMAB A/S	03-Apr-2025	10:48:33 AM	87	1291.00	CEUX
GENMAB A/S	03-Apr-2025	10:48:33 AM	87	1290.00	CEUX
GENMAB A/S	03-Apr-2025	10:48:33 AM	81	1289.00	CEUX
GENMAB A/S	03-Apr-2025	10:50:49 AM	45	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	8	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	16	1290.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	5	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	38	1289.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	10:50:49 AM	1	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	19	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	17	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	4	1289.00	XCSE
GENMAB A/S	03-Apr-2025	10:50:49 AM	31	1289.50	AQEU
GENMAB A/S	03-Apr-2025	10:50:49 AM	5	1289.00	CEUX
GENMAB A/S	03-Apr-2025	10:50:49 AM	81	1289.00	CEUX
GENMAB A/S	03-Apr-2025	10:52:18 AM	83	1287.50	XCSE
GENMAB A/S	03-Apr-2025	10:52:18 AM	87	1287.50	CEUX
GENMAB A/S	03-Apr-2025	10:52:18 AM	26	1286.50	CEUX
GENMAB A/S	03-Apr-2025	10:52:18 AM	61	1286.50	CEUX
GENMAB A/S	03-Apr-2025	10:52:20 AM	79	1286.00	XCSE
GENMAB A/S	03-Apr-2025	10:52:23 AM	5	1286.00	XCSE
GENMAB A/S	03-Apr-2025	10:52:24 AM	30	1285.50	CEUX
GENMAB A/S	03-Apr-2025	10:53:00 AM	81	1285.00	XCSE
GENMAB A/S	03-Apr-2025	10:53:03 AM	52	1284.00	XCSE
GENMAB A/S	03-Apr-2025	10:53:03 AM	30	1284.00	XCSE
GENMAB A/S	03-Apr-2025	10:53:03 AM	63	1284.00	CEUX
GENMAB A/S	03-Apr-2025	10:53:22 AM	15	1283.00	AQEU
GENMAB A/S	03-Apr-2025	10:54:39 AM	56	1282.50	XCSE
GENMAB A/S	03-Apr-2025	10:55:01 AM	25	1283.00	TQEX
GENMAB A/S	03-Apr-2025	10:55:01 AM	40	1283.00	CEUX
GENMAB A/S	03-Apr-2025	10:55:05 AM	30	1282.50	XCSE
GENMAB A/S	03-Apr-2025	10:57:20 AM	47	1282.50	TQEX
GENMAB A/S	03-Apr-2025	10:57:20 AM	29	1282.50	AQEU
GENMAB A/S	03-Apr-2025	10:58:18 AM	19	1283.00	CEUX
GENMAB A/S	03-Apr-2025	10:59:03 AM	20	1283.00	CEUX
GENMAB A/S	03-Apr-2025	10:59:38 AM	14	1283.00	CEUX
GENMAB A/S	03-Apr-2025	11:00:03 AM	88	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:00:03 AM	50	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:00:03 AM	15	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:00:03 AM	30	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:00:03 AM	12	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:00:04 AM	70	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:00:04 AM	19	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:00:30 AM	19	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:00:44 AM	9	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:03:03 AM	6	1281.00	AQEU
GENMAB A/S	03-Apr-2025	11:03:21 AM	19	1281.00	AQEU
GENMAB A/S	03-Apr-2025	11:04:09 AM	82	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:04:09 AM	2	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:04:09 AM	81	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:05:04 AM	1	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:05:04 AM	45	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:05:05 AM	5	1280.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	11:05:25 AM	50	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:05:25 AM	23	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:05:25 AM	45	1279.50	TQEX
GENMAB A/S	03-Apr-2025	11:05:25 AM	24	1280.00	AQEU
GENMAB A/S	03-Apr-2025	11:05:30 AM	58	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:05:30 AM	10	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:05:33 AM	33	1279.50	CEUX
GENMAB A/S	03-Apr-2025	11:06:01 AM	17	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:06:01 AM	8	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:06:01 AM	11	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:06:10 AM	21	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:06:37 AM	50	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:06:37 AM	61	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:07:09 AM	47	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:07:09 AM	1	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:07:09 AM	27	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:08:09 AM	51	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:08:09 AM	19	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:08:09 AM	42	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:08:09 AM	28	1279.50	CEUX
GENMAB A/S	03-Apr-2025	11:09:04 AM	81	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:09:55 AM	25	1278.00	AQEU
GENMAB A/S	03-Apr-2025	11:10:09 AM	20	1278.00	CEUX
GENMAB A/S	03-Apr-2025	11:10:49 AM	16	1279.00	XCSE
GENMAB A/S	03-Apr-2025	11:10:49 AM	5	1279.00	XCSE
GENMAB A/S	03-Apr-2025	11:10:49 AM	39	1279.00	XCSE
GENMAB A/S	03-Apr-2025	11:10:49 AM	20	1279.00	XCSE
GENMAB A/S	03-Apr-2025	11:12:09 AM	30	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:12:09 AM	50	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:12:09 AM	18	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:12:09 AM	13	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:12:09 AM	25	1278.50	TQEX
GENMAB A/S	03-Apr-2025	11:12:12 AM	16	1278.00	AQEU
GENMAB A/S	03-Apr-2025	11:12:12 AM	3	1278.00	CEUX
GENMAB A/S	03-Apr-2025	11:12:12 AM	26	1278.00	CEUX
GENMAB A/S	03-Apr-2025	11:13:36 AM	1	1278.00	XCSE
GENMAB A/S	03-Apr-2025	11:13:36 AM	46	1278.00	XCSE
GENMAB A/S	03-Apr-2025	11:13:36 AM	15	1278.00	XCSE
GENMAB A/S	03-Apr-2025	11:13:36 AM	22	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:14:45 AM	3	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:15:33 AM	44	1279.00	TQEX
GENMAB A/S	03-Apr-2025	11:15:33 AM	36	1279.50	CEUX
GENMAB A/S	03-Apr-2025	11:15:33 AM	28	1279.00	CEUX
GENMAB A/S	03-Apr-2025	11:15:33 AM	55	1279.00	CEUX
GENMAB A/S	03-Apr-2025	11:15:36 AM	24	1278.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	11:16:43 AM	38	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:43 AM	13	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:43 AM	39	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:43 AM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:43 AM	10	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:49 AM	21	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:49 AM	38	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:16:49 AM	7	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:39 AM	1	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:39 AM	5	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:39 AM	38	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:39 AM	39	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:39 AM	21	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:39 AM	7	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:17:46 AM	32	1279.50	CEUX
GENMAB A/S	03-Apr-2025	11:17:46 AM	45	1279.00	CEUX
GENMAB A/S	03-Apr-2025	11:17:46 AM	43	1279.00	CEUX
GENMAB A/S	03-Apr-2025	11:19:49 AM	61	1278.50	XCSE
GENMAB A/S	03-Apr-2025	11:21:26 AM	14	1280.50	AQEU
GENMAB A/S	03-Apr-2025	11:22:30 AM	36	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:22:30 AM	15	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:22:42 AM	18	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:23:39 AM	46	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:23:39 AM	50	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:23:39 AM	15	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:23:39 AM	82	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:23:39 AM	24	1281.00	TQEX
GENMAB A/S	03-Apr-2025	11:23:39 AM	24	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:23:39 AM	83	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:23:41 AM	16	1280.50	AQEU
GENMAB A/S	03-Apr-2025	11:24:38 AM	24	1280.00	TQEX
GENMAB A/S	03-Apr-2025	11:24:38 AM	26	1280.00	CEUX
GENMAB A/S	03-Apr-2025	11:25:01 AM	29	1280.00	CEUX
GENMAB A/S	03-Apr-2025	11:25:06 AM	21	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:25:06 AM	50	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:25:06 AM	20	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:25:06 AM	20	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:25:06 AM	31	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:25:06 AM	24	1279.50	AQEU
GENMAB A/S	03-Apr-2025	11:25:06 AM	30	1280.00	CEUX
GENMAB A/S	03-Apr-2025	11:25:55 AM	12	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:26:38 AM	27	1279.50	XCSE
GENMAB A/S	03-Apr-2025	11:26:45 AM	47	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:26:45 AM	4	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:26:45 AM	38	1280.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	11:26:45 AM	11	1280.00	XCSE
GENMAB A/S	03-Apr-2025	11:28:21 AM	86	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:28:21 AM	46	1280.50	TQEX
GENMAB A/S	03-Apr-2025	11:28:21 AM	1	1280.50	TQEX
GENMAB A/S	03-Apr-2025	11:28:21 AM	27	1280.50	AQEU
GENMAB A/S	03-Apr-2025	11:28:21 AM	83	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:28:22 AM	38	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:28:22 AM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:28:22 AM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:28:22 AM	23	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:28:22 AM	46	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:29:59 AM	41	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:30:43 AM	82	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:30:43 AM	27	1280.50	AQEU
GENMAB A/S	03-Apr-2025	11:30:43 AM	70	1280.00	CEUX
GENMAB A/S	03-Apr-2025	11:30:43 AM	11	1280.00	CEUX
GENMAB A/S	03-Apr-2025	11:34:26 AM	2	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:34:54 AM	27	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:35:01 AM	23	1281.00	CEUX
GENMAB A/S	03-Apr-2025	11:35:24 AM	19	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:35:27 AM	9	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:35:27 AM	18	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:35:27 AM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:35:27 AM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:35:27 AM	48	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:35:54 AM	7	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:36:06 AM	82	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:36:07 AM	38	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:36:07 AM	40	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:36:07 AM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:36:07 AM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:36:07 AM	13	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:36:38 AM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	3	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	4	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	11	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	83	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	11	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	14	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:02 AM	2	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:37:52 AM	51	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:37:52 AM	29	1280.50	AQEU
GENMAB A/S	03-Apr-2025	11:37:52 AM	66	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:37:53 AM	11	1280.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	11:40:50 AM	5	1283.00	CEUX
GENMAB A/S	03-Apr-2025	11:40:54 AM	34	1282.50	TQEX
GENMAB A/S	03-Apr-2025	11:40:54 AM	81	1282.50	CEUX
GENMAB A/S	03-Apr-2025	11:41:22 AM	5	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:42:49 AM	78	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:42:49 AM	25	1282.00	AQEU
GENMAB A/S	03-Apr-2025	11:43:05 AM	11	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:43:05 AM	40	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:43:05 AM	60	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:43:05 AM	84	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:43:21 AM	28	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:43:21 AM	40	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:43:21 AM	24	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:43:21 AM	17	1282.00	XCSE
GENMAB A/S	03-Apr-2025	11:45:18 AM	47	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:18 AM	13	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:18 AM	13	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:18 AM	2	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:21 AM	83	1282.50	CEUX
GENMAB A/S	03-Apr-2025	11:45:25 AM	25	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:25 AM	11	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:25 AM	38	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:36 AM	85	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:45:36 AM	28	1282.00	TQEX
GENMAB A/S	03-Apr-2025	11:45:36 AM	24	1282.00	AQEU
GENMAB A/S	03-Apr-2025	11:45:36 AM	48	1282.50	CEUX
GENMAB A/S	03-Apr-2025	11:45:36 AM	37	1282.50	CEUX
GENMAB A/S	03-Apr-2025	11:47:07 AM	87	1281.50	XCSE
GENMAB A/S	03-Apr-2025	11:47:07 AM	87	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:47:21 AM	16	1281.50	TQEX
GENMAB A/S	03-Apr-2025	11:47:21 AM	13	1281.50	TQEX
GENMAB A/S	03-Apr-2025	11:47:21 AM	68	1281.50	CEUX
GENMAB A/S	03-Apr-2025	11:47:23 AM	82	1280.50	XCSE
GENMAB A/S	03-Apr-2025	11:47:23 AM	28	1280.50	AQEU
GENMAB A/S	03-Apr-2025	11:47:23 AM	82	1280.50	CEUX
GENMAB A/S	03-Apr-2025	11:49:00 AM	20	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:49:00 AM	15	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:49:00 AM	8	1282.50	XCSE
GENMAB A/S	03-Apr-2025	11:50:02 AM	88	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:50:02 AM	45	1284.00	TQEX
GENMAB A/S	03-Apr-2025	11:50:02 AM	50	1284.00	CEUX
GENMAB A/S	03-Apr-2025	11:52:39 AM	47	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:53:08 AM	70	1284.00	CEUX
GENMAB A/S	03-Apr-2025	11:53:25 AM	19	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:53:26 AM	14	1284.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	11:53:31 AM	11	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:09 AM	40	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:09 AM	9	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:09 AM	9	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:09 AM	47	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:09 AM	6	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:39 AM	21	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:54:39 AM	14	1284.50	XCSE
GENMAB A/S	03-Apr-2025	11:57:08 AM	12	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:57:16 AM	45	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:57:23 AM	3	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:57:44 AM	10	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:57:44 AM	16	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:57:44 AM	25	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:57:44 AM	83	1283.50	XCSE
GENMAB A/S	03-Apr-2025	11:57:44 AM	24	1283.50	AQEU
GENMAB A/S	03-Apr-2025	11:58:40 AM	81	1283.50	XCSE
GENMAB A/S	03-Apr-2025	11:58:40 AM	24	1283.50	TQEX
GENMAB A/S	03-Apr-2025	11:58:40 AM	27	1283.50	AQEU
GENMAB A/S	03-Apr-2025	11:59:26 AM	26	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:59:26 AM	12	1284.00	XCSE
GENMAB A/S	03-Apr-2025	11:59:44 AM	48	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:01:10 PM	82	1284.50	XCSE
GENMAB A/S	03-Apr-2025	12:01:10 PM	81	1284.50	CEUX
GENMAB A/S	03-Apr-2025	12:02:27 PM	84	1283.50	XCSE
GENMAB A/S	03-Apr-2025	12:02:28 PM	55	1283.00	CEUX
GENMAB A/S	03-Apr-2025	12:03:36 PM	47	1283.00	TQEX
GENMAB A/S	03-Apr-2025	12:03:36 PM	87	1283.00	CEUX
GENMAB A/S	03-Apr-2025	12:04:27 PM	5	1283.00	XCSE
GENMAB A/S	03-Apr-2025	12:05:24 PM	22	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:05:26 PM	22	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:05:28 PM	18	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:05:28 PM	18	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:05:28 PM	60	1283.50	XCSE
GENMAB A/S	03-Apr-2025	12:05:57 PM	18	1283.50	XCSE
GENMAB A/S	03-Apr-2025	12:05:57 PM	8	1283.50	XCSE
GENMAB A/S	03-Apr-2025	12:07:28 PM	8	1283.50	XCSE
GENMAB A/S	03-Apr-2025	12:08:26 PM	8	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:08:37 PM	85	1283.50	XCSE
GENMAB A/S	03-Apr-2025	12:08:37 PM	37	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:08:37 PM	15	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:08:37 PM	12	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:08:37 PM	11	1284.00	XCSE
GENMAB A/S	03-Apr-2025	12:09:43 PM	32	1283.00	AQEU
GENMAB A/S	03-Apr-2025	12:09:43 PM	85	1283.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	12:10:16 PM	26	1283.00	XCSE
GENMAB A/S	03-Apr-2025	12:10:16 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:11:29 PM	13	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:11:29 PM	10	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:11:51 PM	83	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:12:03 PM	33	1282.00	AQEU
GENMAB A/S	03-Apr-2025	12:12:03 PM	39	1282.00	CEUX
GENMAB A/S	03-Apr-2025	12:12:34 PM	86	1281.00	XCSE
GENMAB A/S	03-Apr-2025	12:12:34 PM	88	1281.00	CEUX
GENMAB A/S	03-Apr-2025	12:13:01 PM	86	1280.00	XCSE
GENMAB A/S	03-Apr-2025	12:13:03 PM	85	1279.50	CEUX
GENMAB A/S	03-Apr-2025	12:13:41 PM	25	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:15:01 PM	73	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:15:01 PM	8	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:15:01 PM	37	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:15:01 PM	20	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:17:01 PM	14	1282.00	TQEX
GENMAB A/S	03-Apr-2025	12:17:01 PM	21	1282.00	TQEX
GENMAB A/S	03-Apr-2025	12:18:01 PM	85	1281.50	XCSE
GENMAB A/S	03-Apr-2025	12:18:01 PM	37	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:18:01 PM	50	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:18:01 PM	34	1281.00	TQEX
GENMAB A/S	03-Apr-2025	12:18:01 PM	45	1281.50	AQEU
GENMAB A/S	03-Apr-2025	12:18:01 PM	60	1281.00	CEUX
GENMAB A/S	03-Apr-2025	12:18:41 PM	85	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:18:41 PM	44	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:18:44 PM	87	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:18:47 PM	50	1279.00	CEUX
GENMAB A/S	03-Apr-2025	12:19:33 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:19:33 PM	31	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:23:36 PM	87	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:23:36 PM	43	1282.50	CEUX
GENMAB A/S	03-Apr-2025	12:23:36 PM	22	1282.50	CEUX
GENMAB A/S	03-Apr-2025	12:23:58 PM	46	1282.50	CEUX
GENMAB A/S	03-Apr-2025	12:27:51 PM	37	1282.00	XCSE
GENMAB A/S	03-Apr-2025	12:27:51 PM	35	1282.00	XCSE
GENMAB A/S	03-Apr-2025	12:27:51 PM	15	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:27:51 PM	24	1282.50	XCSE
GENMAB A/S	03-Apr-2025	12:27:51 PM	87	1281.50	XCSE
GENMAB A/S	03-Apr-2025	12:27:51 PM	55	1281.50	CEUX
GENMAB A/S	03-Apr-2025	12:27:51 PM	7	1281.50	CEUX
GENMAB A/S	03-Apr-2025	12:29:59 PM	45	1281.50	XCSE
GENMAB A/S	03-Apr-2025	12:29:59 PM	3	1281.50	XCSE
GENMAB A/S	03-Apr-2025	12:29:59 PM	17	1281.50	XCSE
GENMAB A/S	03-Apr-2025	12:29:59 PM	23	1281.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	12:30:00 PM	24	1281.00	AQEU
GENMAB A/S	03-Apr-2025	12:31:26 PM	81	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:31:26 PM	33	1280.50	TQEX
GENMAB A/S	03-Apr-2025	12:33:27 PM	39	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:33:27 PM	1	1280.00	AQEU
GENMAB A/S	03-Apr-2025	12:33:27 PM	1	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:33:27 PM	1	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:33:27 PM	1	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:34:28 PM	16	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:35:26 PM	16	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:35:26 PM	50	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:35:26 PM	45	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:36:06 PM	85	1280.50	XCSE
GENMAB A/S	03-Apr-2025	12:36:06 PM	25	1280.50	TQEX
GENMAB A/S	03-Apr-2025	12:36:06 PM	33	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:36:26 PM	85	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:37:18 PM	31	1279.00	AQEU
GENMAB A/S	03-Apr-2025	12:37:18 PM	27	1279.00	CEUX
GENMAB A/S	03-Apr-2025	12:37:33 PM	81	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:37:33 PM	39	1278.00	CEUX
GENMAB A/S	03-Apr-2025	12:40:49 PM	14	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:40:49 PM	5	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:40:49 PM	44	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:40:49 PM	24	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:42:20 PM	8	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:43:30 PM	16	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:43:31 PM	15	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:43:31 PM	3	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:43:31 PM	42	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:43:33 PM	19	1279.00	XCSE
GENMAB A/S	03-Apr-2025	12:43:33 PM	12	1279.00	XCSE
GENMAB A/S	03-Apr-2025	12:43:33 PM	44	1279.00	XCSE
GENMAB A/S	03-Apr-2025	12:43:33 PM	4	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:43:50 PM	1	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:43:59 PM	1	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:43:59 PM	42	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:44:39 PM	16	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:44:39 PM	4	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:44:39 PM	37	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:46:29 PM	23	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:46:29 PM	11	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:46:30 PM	41	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:48:19 PM	27	1279.00	AQEU
GENMAB A/S	03-Apr-2025	12:48:19 PM	24	1279.00	CEUX
GENMAB A/S	03-Apr-2025	12:48:32 PM	34	1279.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	12:48:32 PM	22	1279.00	XCSE
GENMAB A/S	03-Apr-2025	12:49:58 PM	32	1279.50	CEUX
GENMAB A/S	03-Apr-2025	12:49:59 PM	35	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:49:59 PM	15	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:49:59 PM	39	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:49:59 PM	17	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:50:25 PM	12	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:51:01 PM	111	1280.00	XCSE
GENMAB A/S	03-Apr-2025	12:51:01 PM	82	1279.00	XCSE
GENMAB A/S	03-Apr-2025	12:51:01 PM	34	1279.50	TQEX
GENMAB A/S	03-Apr-2025	12:51:01 PM	25	1279.00	AQEU
GENMAB A/S	03-Apr-2025	12:51:01 PM	79	1280.00	CEUX
GENMAB A/S	03-Apr-2025	12:51:01 PM	82	1279.50	CEUX
GENMAB A/S	03-Apr-2025	12:51:56 PM	31	1278.50	TQEX
GENMAB A/S	03-Apr-2025	12:51:56 PM	41	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:51:56 PM	45	1278.50	CEUX
GENMAB A/S	03-Apr-2025	12:52:07 PM	73	1278.00	XCSE
GENMAB A/S	03-Apr-2025	12:52:07 PM	28	1278.00	AQEU
GENMAB A/S	03-Apr-2025	12:52:26 PM	28	1277.50	TQEX
GENMAB A/S	03-Apr-2025	12:52:26 PM	83	1277.50	CEUX
GENMAB A/S	03-Apr-2025	12:55:26 PM	5	1278.50	XCSE
GENMAB A/S	03-Apr-2025	12:56:31 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:56:42 PM	12	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:56:44 PM	12	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:56:44 PM	17	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:56:48 PM	10	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	45	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	39	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	27	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	45	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	17	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	2	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	2	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	39	1279.50	XCSE
GENMAB A/S	03-Apr-2025	12:59:03 PM	6	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:39 PM	10	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:46 PM	10	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:48 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:51 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:51 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:59 PM	2	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:59 PM	2	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:00:59 PM	39	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:01:19 PM	10	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:01:19 PM	4	1279.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	13:01:19 PM	18	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:01:49 PM	4	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:01:49 PM	26	1279.50	XCSE
GENMAB A/S	03-Apr-2025	13:02:05 PM	5	1278.50	TQEX
GENMAB A/S	03-Apr-2025	13:02:05 PM	26	1278.50	AQEU
GENMAB A/S	03-Apr-2025	13:02:19 PM	13	1279.00	XCSE
GENMAB A/S	03-Apr-2025	13:02:19 PM	7	1279.00	XCSE
GENMAB A/S	03-Apr-2025	13:06:01 PM	85	1278.50	XCSE
GENMAB A/S	03-Apr-2025	13:06:01 PM	75	1278.50	XCSE
GENMAB A/S	03-Apr-2025	13:06:01 PM	36	1278.50	XCSE
GENMAB A/S	03-Apr-2025	13:06:01 PM	20	1278.50	TQEX
GENMAB A/S	03-Apr-2025	13:06:01 PM	24	1278.00	TQEX
GENMAB A/S	03-Apr-2025	13:06:01 PM	84	1278.50	CEUX
GENMAB A/S	03-Apr-2025	13:06:01 PM	32	1278.50	CEUX
GENMAB A/S	03-Apr-2025	13:06:06 PM	83	1277.50	XCSE
GENMAB A/S	03-Apr-2025	13:06:06 PM	39	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:06:06 PM	24	1277.50	AQEU
GENMAB A/S	03-Apr-2025	13:06:06 PM	59	1277.50	CEUX
GENMAB A/S	03-Apr-2025	13:07:03 PM	6	1277.50	XCSE
GENMAB A/S	03-Apr-2025	13:07:08 PM	79	1277.50	XCSE
GENMAB A/S	03-Apr-2025	13:07:11 PM	88	1278.50	XCSE
GENMAB A/S	03-Apr-2025	13:07:11 PM	87	1277.50	XCSE
GENMAB A/S	03-Apr-2025	13:07:11 PM	28	1278.00	TQEX
GENMAB A/S	03-Apr-2025	13:07:11 PM	55	1278.50	CEUX
GENMAB A/S	03-Apr-2025	13:07:11 PM	29	1278.50	CEUX
GENMAB A/S	03-Apr-2025	13:08:15 PM	35	1278.50	XCSE
GENMAB A/S	03-Apr-2025	13:08:23 PM	36	1278.50	XCSE
GENMAB A/S	03-Apr-2025	13:11:15 PM	24	1278.00	CEUX
GENMAB A/S	03-Apr-2025	13:12:03 PM	59	1277.50	XCSE
GENMAB A/S	03-Apr-2025	13:12:03 PM	85	1277.50	CEUX
GENMAB A/S	03-Apr-2025	13:13:27 PM	25	1277.00	TQEX
GENMAB A/S	03-Apr-2025	13:13:27 PM	36	1277.00	AQEU
GENMAB A/S	03-Apr-2025	13:13:45 PM	82	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:15:05 PM	22	1277.00	CEUX
GENMAB A/S	03-Apr-2025	13:15:05 PM	1	1277.00	CEUX
GENMAB A/S	03-Apr-2025	13:15:05 PM	1	1277.00	CEUX
GENMAB A/S	03-Apr-2025	13:15:45 PM	81	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:15:45 PM	32	1278.50	TQEX
GENMAB A/S	03-Apr-2025	13:15:45 PM	27	1278.00	AQEU
GENMAB A/S	03-Apr-2025	13:15:45 PM	82	1278.00	CEUX
GENMAB A/S	03-Apr-2025	13:16:07 PM	82	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:16:07 PM	88	1278.00	CEUX
GENMAB A/S	03-Apr-2025	13:16:10 PM	51	1277.00	XCSE
GENMAB A/S	03-Apr-2025	13:16:31 PM	37	1277.00	XCSE
GENMAB A/S	03-Apr-2025	13:16:31 PM	81	1277.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	13:17:46 PM	5	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:17:46 PM	78	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:20:08 PM	13	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:20:08 PM	1	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:20:08 PM	4	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:20:08 PM	30	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:20:22 PM	27	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:21:52 PM	45	1277.00	XCSE
GENMAB A/S	03-Apr-2025	13:21:52 PM	31	1277.00	TQEX
GENMAB A/S	03-Apr-2025	13:21:52 PM	81	1277.00	CEUX
GENMAB A/S	03-Apr-2025	13:21:55 PM	16	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:21:55 PM	38	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:21:55 PM	25	1276.50	AQEU
GENMAB A/S	03-Apr-2025	13:21:58 PM	61	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:21:58 PM	20	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:24:56 PM	28	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:24:56 PM	20	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:24:56 PM	28	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:24:56 PM	19	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:24:56 PM	5	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:26:25 PM	13	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:26:45 PM	72	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:26:45 PM	16	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:27:25 PM	1	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:27:36 PM	25	1276.00	TQEX
GENMAB A/S	03-Apr-2025	13:27:36 PM	77	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:27:39 PM	4	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:30:28 PM	1	1275.50	AQEU
GENMAB A/S	03-Apr-2025	13:30:28 PM	1	1275.50	AQEU
GENMAB A/S	03-Apr-2025	13:30:29 PM	1	1275.50	AQEU
GENMAB A/S	03-Apr-2025	13:30:47 PM	38	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:31:42 PM	69	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:31:42 PM	20	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:31:42 PM	84	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:31:50 PM	26	1275.50	TQEX
GENMAB A/S	03-Apr-2025	13:31:50 PM	21	1275.50	AQEU
GENMAB A/S	03-Apr-2025	13:31:51 PM	4	1276.00	XCSE
GENMAB A/S	03-Apr-2025	13:32:08 PM	47	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:32:08 PM	4	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:32:08 PM	21	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:32:08 PM	2	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:32:42 PM	22	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:32:42 PM	62	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:32:42 PM	24	1275.50	AQEU
GENMAB A/S	03-Apr-2025	13:32:42 PM	74	1275.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	13:34:26 PM	88	1274.50	XCSE
GENMAB A/S	03-Apr-2025	13:34:26 PM	44	1273.50	TQEX
GENMAB A/S	03-Apr-2025	13:34:26 PM	25	1274.50	AQEU
GENMAB A/S	03-Apr-2025	13:34:26 PM	81	1274.50	CEUX
GENMAB A/S	03-Apr-2025	13:34:26 PM	46	1273.50	CEUX
GENMAB A/S	03-Apr-2025	13:34:52 PM	34	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:34:52 PM	53	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:36:09 PM	77	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:36:09 PM	9	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:36:09 PM	43	1273.00	CEUX
GENMAB A/S	03-Apr-2025	13:37:25 PM	82	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:37:25 PM	27	1273.00	CEUX
GENMAB A/S	03-Apr-2025	13:40:26 PM	6	1273.50	XCSE
GENMAB A/S	03-Apr-2025	13:41:40 PM	84	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:42:07 PM	47	1274.50	XCSE
GENMAB A/S	03-Apr-2025	13:42:07 PM	40	1274.50	XCSE
GENMAB A/S	03-Apr-2025	13:42:07 PM	20	1274.50	CEUX
GENMAB A/S	03-Apr-2025	13:42:07 PM	42	1274.50	CEUX
GENMAB A/S	03-Apr-2025	13:43:26 PM	37	1274.50	XCSE
GENMAB A/S	03-Apr-2025	13:43:26 PM	23	1274.50	XCSE
GENMAB A/S	03-Apr-2025	13:43:27 PM	23	1274.50	XCSE
GENMAB A/S	03-Apr-2025	13:43:41 PM	25	1274.00	XCSE
GENMAB A/S	03-Apr-2025	13:43:41 PM	61	1274.00	XCSE
GENMAB A/S	03-Apr-2025	13:46:04 PM	1	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:46:05 PM	17	1273.00	AQEU
GENMAB A/S	03-Apr-2025	13:47:12 PM	10	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	11	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	12	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	16	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	9	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	15	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	23	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:47:13 PM	16	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:48:27 PM	14	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:48:29 PM	5	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	44	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	6	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	6	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	27	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	27	1275.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	13:50:58 PM	1	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	38	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	68	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:50:58 PM	5	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:51:05 PM	9	1275.50	XCSE
GENMAB A/S	03-Apr-2025	13:52:15 PM	81	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:52:15 PM	47	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:52:15 PM	19	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:52:15 PM	35	1275.00	AQEU
GENMAB A/S	03-Apr-2025	13:52:15 PM	32	1275.00	CEUX
GENMAB A/S	03-Apr-2025	13:53:26 PM	29	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:53:26 PM	26	1275.00	CEUX
GENMAB A/S	03-Apr-2025	13:53:26 PM	68	1274.50	CEUX
GENMAB A/S	03-Apr-2025	13:53:26 PM	17	1274.50	CEUX
GENMAB A/S	03-Apr-2025	13:53:27 PM	88	1274.00	XCSE
GENMAB A/S	03-Apr-2025	13:54:03 PM	24	1274.00	AQEU
GENMAB A/S	03-Apr-2025	13:54:29 PM	24	1273.50	TQEX
GENMAB A/S	03-Apr-2025	13:55:26 PM	60	1273.50	XCSE
GENMAB A/S	03-Apr-2025	13:55:26 PM	67	1273.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:03 PM	1	1274.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:10 PM	11	1275.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:10 PM	11	1275.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:17 PM	7	1275.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:19 PM	14	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:19 PM	5	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:19 PM	5	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:49 PM	53	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:49 PM	31	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:49 PM	58	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:49 PM	28	1278.00	XCSE
GENMAB A/S	03-Apr-2025	13:56:49 PM	36	1278.00	TQEX
GENMAB A/S	03-Apr-2025	13:56:49 PM	27	1278.00	TQEX
GENMAB A/S	03-Apr-2025	13:56:49 PM	8	1277.50	AQEU
GENMAB A/S	03-Apr-2025	13:56:49 PM	7	1277.50	AQEU
GENMAB A/S	03-Apr-2025	13:56:49 PM	2	1277.50	AQEU
GENMAB A/S	03-Apr-2025	13:56:49 PM	4	1277.50	AQEU
GENMAB A/S	03-Apr-2025	13:56:49 PM	75	1278.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:49 PM	8	1278.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:52 PM	87	1276.50	XCSE
GENMAB A/S	03-Apr-2025	13:56:52 PM	38	1277.00	TQEX
GENMAB A/S	03-Apr-2025	13:56:52 PM	61	1277.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:52 PM	23	1277.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:55 PM	42	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:56:55 PM	40	1276.00	CEUX
GENMAB A/S	03-Apr-2025	13:58:20 PM	55	1275.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	13:58:20 PM	12	1275.00	XCSE
GENMAB A/S	03-Apr-2025	13:58:20 PM	14	1275.00	XCSE
GENMAB A/S	03-Apr-2025	14:01:10 PM	85	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:03:15 PM	7	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:03:15 PM	9	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:03:15 PM	9	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:03:16 PM	26	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:03:16 PM	20	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:03:16 PM	26	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:03:16 PM	27	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:03:17 PM	22	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:03:25 PM	11	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:26 PM	11	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:04:27 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:27 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:27 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:27 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:27 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:27 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:27 PM	4	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:04:58 PM	9	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:04:58 PM	102	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:04:58 PM	9	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:04:58 PM	12	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:04:58 PM	24	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:05:15 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:05:15 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:05:15 PM	4	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:05:19 PM	9	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:05:19 PM	9	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:05:19 PM	36	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:06:21 PM	87	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:06:21 PM	27	1277.00	AQEU
GENMAB A/S	03-Apr-2025	14:06:21 PM	81	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:06:51 PM	12	1276.50	TQEX
GENMAB A/S	03-Apr-2025	14:07:45 PM	11	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:08:27 PM	17	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:08:43 PM	31	1278.00	TQEX
GENMAB A/S	03-Apr-2025	14:08:43 PM	29	1278.00	TQEX
GENMAB A/S	03-Apr-2025	14:08:43 PM	8	1278.00	AQEU
GENMAB A/S	03-Apr-2025	14:08:43 PM	29	1278.00	AQEU
GENMAB A/S	03-Apr-2025	14:08:43 PM	6	1278.50	CEUX
GENMAB A/S	03-Apr-2025	14:08:43 PM	6	1278.50	CEUX
GENMAB A/S	03-Apr-2025	14:08:43 PM	8	1278.50	CEUX
GENMAB A/S	03-Apr-2025	14:08:46 PM	83	1277.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	14:08:46 PM	2	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:08:48 PM	87	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:09:00 PM	51	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:09:00 PM	33	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:09:00 PM	27	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:09:00 PM	15	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:09:00 PM	35	1278.00	AQEU
GENMAB A/S	03-Apr-2025	14:09:00 PM	83	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:09:20 PM	52	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:09:49 PM	21	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:10:10 PM	85	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:10:13 PM	26	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:10:52 PM	9	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:11:29 PM	9	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:12:25 PM	9	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:13:26 PM	17	1277.00	TQEX
GENMAB A/S	03-Apr-2025	14:13:26 PM	10	1277.00	TQEX
GENMAB A/S	03-Apr-2025	14:13:36 PM	17	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:13:36 PM	15	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:13:37 PM	16	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:13:37 PM	95	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:13:37 PM	16	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:13:37 PM	22	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:13:37 PM	16	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:13:37 PM	57	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:13:39 PM	23	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:14:18 PM	31	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:14:18 PM	49	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:14:18 PM	36	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:14:49 PM	10	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:18:56 PM	9	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:56 PM	53	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:56 PM	58	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:56 PM	21	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:56 PM	4	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:56 PM	22	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:56 PM	20	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:56 PM	24	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:56 PM	10	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:56 PM	9	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:18:57 PM	18	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:57 PM	6	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:57 PM	87	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:57 PM	18	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:18:57 PM	78	1278.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	14:18:57 PM	31	1278.00	AQEU
GENMAB A/S	03-Apr-2025	14:18:58 PM	61	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:19:29 PM	68	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:19:29 PM	1	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:19:36 PM	17	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:19:36 PM	64	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:19:44 PM	24	1277.50	TQEX
GENMAB A/S	03-Apr-2025	14:19:44 PM	8	1277.00	AQEU
GENMAB A/S	03-Apr-2025	14:19:44 PM	87	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:20:43 PM	21	1277.00	AQEU
GENMAB A/S	03-Apr-2025	14:20:46 PM	28	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:22:38 PM	38	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:22:38 PM	1	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:22:38 PM	5	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:22:38 PM	50	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:22:38 PM	8	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:22:59 PM	16	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:23:26 PM	27	1277.00	TQEX
GENMAB A/S	03-Apr-2025	14:23:26 PM	1	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:23:45 PM	2	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:23:45 PM	9	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:23:45 PM	42	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:23:45 PM	16	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:23:45 PM	34	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:23:46 PM	12	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:23:46 PM	15	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:24:08 PM	70	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:24:08 PM	41	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:24:29 PM	64	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:24:29 PM	26	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:24:29 PM	27	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:24:29 PM	9	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:24:29 PM	84	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:24:46 PM	82	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:24:46 PM	26	1277.50	TQEX
GENMAB A/S	03-Apr-2025	14:24:46 PM	26	1277.50	AQEU
GENMAB A/S	03-Apr-2025	14:24:46 PM	86	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:28:19 PM	60	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:28:28 PM	12	1276.50	AQEU
GENMAB A/S	03-Apr-2025	14:29:23 PM	22	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:29:23 PM	33	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:29:23 PM	21	1276.50	AQEU
GENMAB A/S	03-Apr-2025	14:29:23 PM	6	1276.00	CEUX
GENMAB A/S	03-Apr-2025	14:29:27 PM	8	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:30:26 PM	12	1276.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	14:30:26 PM	24	1276.50	CEUX
GENMAB A/S	03-Apr-2025	14:31:02 PM	27	1276.00	TQEX
GENMAB A/S	03-Apr-2025	14:31:02 PM	62	1276.00	CEUX
GENMAB A/S	03-Apr-2025	14:31:02 PM	17	1276.00	CEUX
GENMAB A/S	03-Apr-2025	14:31:39 PM	83	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:31:39 PM	2	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:31:39 PM	2	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:31:39 PM	27	1275.50	AQEU
GENMAB A/S	03-Apr-2025	14:32:14 PM	32	1276.00	TQEX
GENMAB A/S	03-Apr-2025	14:32:25 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:32:25 PM	74	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:32:25 PM	30	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:25 PM	44	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:25 PM	37	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:25 PM	81	1275.50	CEUX
GENMAB A/S	03-Apr-2025	14:32:26 PM	2	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:26 PM	46	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:26 PM	27	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:26 PM	8	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:32:26 PM	10	1275.50	AQEU
GENMAB A/S	03-Apr-2025	14:35:03 PM	16	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:35:03 PM	25	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:35:03 PM	64	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:35:03 PM	6	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:35:15 PM	4	1275.50	CEUX
GENMAB A/S	03-Apr-2025	14:35:15 PM	25	1275.50	CEUX
GENMAB A/S	03-Apr-2025	14:35:15 PM	7	1275.50	CEUX
GENMAB A/S	03-Apr-2025	14:35:15 PM	25	1275.50	CEUX
GENMAB A/S	03-Apr-2025	14:37:27 PM	27	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:37:27 PM	15	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:37:27 PM	28	1276.00	TQEX
GENMAB A/S	03-Apr-2025	14:37:28 PM	21	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:37:28 PM	19	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:37:29 PM	22	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:37:29 PM	27	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:37:30 PM	13	1276.50	XCSE
GENMAB A/S	03-Apr-2025	14:37:30 PM	9	1276.50	CEUX
GENMAB A/S	03-Apr-2025	14:37:48 PM	32	1276.50	CEUX
GENMAB A/S	03-Apr-2025	14:37:49 PM	41	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:37:49 PM	35	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:37:49 PM	7	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:37:55 PM	13	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:37:55 PM	12	1277.00	CEUX
GENMAB A/S	03-Apr-2025	14:38:24 PM	3	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:39:26 PM	36	1277.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	14:40:26 PM	5	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:40:26 PM	15	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:40:43 PM	49	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:40:43 PM	34	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:40:43 PM	4	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:41:43 PM	24	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:41:44 PM	19	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:41:44 PM	34	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:26 PM	16	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:42:36 PM	5	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:42:36 PM	79	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:42:42 PM	9	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:46 PM	8	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:46 PM	28	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:53 PM	9	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:54 PM	30	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:54 PM	8	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:42:54 PM	44	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:24 PM	30	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:24 PM	35	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:24 PM	46	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:27 PM	55	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:28 PM	9	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:29 PM	19	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:29 PM	11	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:34 PM	10	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:34 PM	48	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:34 PM	49	1277.50	XCSE
GENMAB A/S	03-Apr-2025	14:43:36 PM	84	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:43:36 PM	24	1277.00	TQEX
GENMAB A/S	03-Apr-2025	14:43:36 PM	24	1277.00	AQEU
GENMAB A/S	03-Apr-2025	14:43:37 PM	52	1276.50	CEUX
GENMAB A/S	03-Apr-2025	14:44:29 PM	41	1276.00	XCSE
GENMAB A/S	03-Apr-2025	14:44:29 PM	29	1276.00	TQEX
GENMAB A/S	03-Apr-2025	14:44:35 PM	8	1276.00	AQEU
GENMAB A/S	03-Apr-2025	14:44:38 PM	20	1276.00	AQEU
GENMAB A/S	03-Apr-2025	14:44:41 PM	4	1276.00	AQEU
GENMAB A/S	03-Apr-2025	14:45:26 PM	83	1275.50	CEUX
GENMAB A/S	03-Apr-2025	14:45:27 PM	10	1275.50	XCSE
GENMAB A/S	03-Apr-2025	14:45:56 PM	84	1275.00	XCSE
GENMAB A/S	03-Apr-2025	14:45:56 PM	24	1275.00	TQEX
GENMAB A/S	03-Apr-2025	14:45:56 PM	30	1275.00	AQEU
GENMAB A/S	03-Apr-2025	14:46:17 PM	86	1274.00	XCSE
GENMAB A/S	03-Apr-2025	14:46:17 PM	27	1274.00	CEUX
GENMAB A/S	03-Apr-2025	14:46:17 PM	57	1274.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	14:48:21 PM	24	1273.50	TQEX
GENMAB A/S	03-Apr-2025	14:49:09 PM	40	1275.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	37	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	1	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	44	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	29	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	30	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	70	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:03 PM	11	1277.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:44 PM	16	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:50:44 PM	40	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:51:09 PM	16	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:51:09 PM	10	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:51:09 PM	17	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:51:09 PM	4	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:51:09 PM	88	1278.00	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	149	1278.00	XCSE
GENMAB A/S	03-Apr-2025	14:51:29 PM	85	1281.00	XCSE
GENMAB A/S	03-Apr-2025	14:51:29 PM	87	1280.00	XCSE
GENMAB A/S	03-Apr-2025	14:51:29 PM	82	1278.50	XCSE
GENMAB A/S	03-Apr-2025	14:51:29 PM	28	1281.00	TQEX
GENMAB A/S	03-Apr-2025	14:51:29 PM	36	1280.00	TQEX
GENMAB A/S	03-Apr-2025	14:51:29 PM	87	1280.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	85	1279.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	87	1278.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	18	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	1	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	6	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	3	1277.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:29 PM	3	1278.00	AQEU
GENMAB A/S	03-Apr-2025	14:51:29 PM	24	1281.00	AQEU
GENMAB A/S	03-Apr-2025	14:51:29 PM	31	1280.00	AQEU
GENMAB A/S	03-Apr-2025	14:51:29 PM	30	1279.00	AQEU
GENMAB A/S	03-Apr-2025	14:51:30 PM	24	1280.50	XCSE
GENMAB A/S	03-Apr-2025	14:51:30 PM	33	1279.50	XCSE
GENMAB A/S	03-Apr-2025	14:51:30 PM	30	1278.50	XCSE
GENMAB A/S	03-Apr-2025	14:51:30 PM	31	1280.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:30 PM	43	1279.50	CEUX
GENMAB A/S	03-Apr-2025	14:51:30 PM	53	1278.50	CEUX
GENMAB A/S	03-Apr-2025	14:52:18 PM	7	1279.50	XCSE
GENMAB A/S	03-Apr-2025	14:52:20 PM	15	1279.50	XCSE
GENMAB A/S	03-Apr-2025	14:52:20 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	14:54:28 PM	66	1282.50	XCSE
GENMAB A/S	03-Apr-2025	14:56:20 PM	83	1286.00	XCSE
GENMAB A/S	03-Apr-2025	14:56:20 PM	28	1286.50	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	14:56:20 PM	65	1286.00	CEUX
GENMAB A/S	03-Apr-2025	14:56:20 PM	24	1286.00	AQEU
GENMAB A/S	03-Apr-2025	14:56:28 PM	78	1285.00	XCSE
GENMAB A/S	03-Apr-2025	14:56:28 PM	60	1285.00	CEUX
GENMAB A/S	03-Apr-2025	14:57:03 PM	16	1284.00	XCSE
GENMAB A/S	03-Apr-2025	14:57:27 PM	49	1284.00	CEUX
GENMAB A/S	03-Apr-2025	14:57:28 PM	55	1284.00	XCSE
GENMAB A/S	03-Apr-2025	14:57:28 PM	6	1284.00	CEUX
GENMAB A/S	03-Apr-2025	14:58:11 PM	85	1286.00	XCSE
GENMAB A/S	03-Apr-2025	14:58:11 PM	53	1286.00	CEUX
GENMAB A/S	03-Apr-2025	14:59:27 PM	85	1286.00	XCSE
GENMAB A/S	03-Apr-2025	14:59:27 PM	39	1286.00	CEUX
GENMAB A/S	03-Apr-2025	15:00:17 PM	16	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:00:17 PM	1	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:00:17 PM	69	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:00:17 PM	46	1287.00	TQEX
GENMAB A/S	03-Apr-2025	15:00:17 PM	44	1287.00	CEUX
GENMAB A/S	03-Apr-2025	15:02:26 PM	46	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:03:02 PM	15	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:03:02 PM	69	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:03:02 PM	25	1287.00	AQEU
GENMAB A/S	03-Apr-2025	15:04:17 PM	9	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	9	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	6	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	32	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	44	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	3	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	3	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	5	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:17 PM	22	1286.00	AQEU
GENMAB A/S	03-Apr-2025	15:04:23 PM	7	1286.00	CEUX
GENMAB A/S	03-Apr-2025	15:04:27 PM	83	1286.00	XCSE
GENMAB A/S	03-Apr-2025	15:04:27 PM	32	1286.00	CEUX
GENMAB A/S	03-Apr-2025	15:06:26 PM	65	1285.00	XCSE
GENMAB A/S	03-Apr-2025	15:06:26 PM	24	1285.00	TQEX
GENMAB A/S	03-Apr-2025	15:06:26 PM	30	1285.00	CEUX
GENMAB A/S	03-Apr-2025	15:07:28 PM	44	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:07:28 PM	11	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:07:28 PM	30	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:07:28 PM	26	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:07:28 PM	52	1284.00	CEUX
GENMAB A/S	03-Apr-2025	15:07:28 PM	24	1284.00	AQEU
GENMAB A/S	03-Apr-2025	15:08:09 PM	23	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:08:09 PM	24	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:08:09 PM	44	1284.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:08:09 PM	20	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:08:29 PM	82	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:09:59 PM	34	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:09:59 PM	10	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:09:59 PM	36	1283.50	TQEX
GENMAB A/S	03-Apr-2025	15:09:59 PM	33	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:09:59 PM	36	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:09:59 PM	19	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:10:27 PM	39	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:10:27 PM	50	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:10:35 PM	37	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:10:45 PM	2	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:10:45 PM	22	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:10:48 PM	86	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:10:48 PM	64	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:12:26 PM	2	1283.50	AQEU
GENMAB A/S	03-Apr-2025	15:12:28 PM	44	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:12:28 PM	19	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:13:11 PM	83	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:13:11 PM	45	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:13:11 PM	14	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:13:11 PM	25	1283.50	TQEX
GENMAB A/S	03-Apr-2025	15:13:11 PM	20	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:13:11 PM	46	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:14:11 PM	82	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:14:11 PM	81	1283.50	CEUX
GENMAB A/S	03-Apr-2025	15:14:22 PM	87	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:14:22 PM	25	1282.50	TQEX
GENMAB A/S	03-Apr-2025	15:14:22 PM	19	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:14:22 PM	65	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:14:22 PM	8	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:14:22 PM	26	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:15:39 PM	9	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:15:39 PM	4	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:15:39 PM	36	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:17:26 PM	31	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:18:00 PM	45	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:18:00 PM	28	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:18:04 PM	82	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:18:04 PM	37	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:18:04 PM	19	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:18:04 PM	84	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:18:06 PM	45	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:18:06 PM	15	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:18:06 PM	11	1282.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:18:28 PM	6	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:18:28 PM	11	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:19:27 PM	7	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:19:27 PM	5	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:19:28 PM	18	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:20:26 PM	32	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:20:26 PM	21	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:21:12 PM	85	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:12 PM	30	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:12 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:12 PM	26	1282.50	TQEX
GENMAB A/S	03-Apr-2025	15:21:12 PM	81	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:21:12 PM	35	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:21:13 PM	30	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:13 PM	25	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:13 PM	29	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:13 PM	27	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:21:21 PM	11	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:21:21 PM	12	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:21:26 PM	35	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:21:59 PM	71	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:22:45 PM	25	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:23:09 PM	15	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:23:26 PM	17	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:24:09 PM	24	1282.50	TQEX
GENMAB A/S	03-Apr-2025	15:24:09 PM	87	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:24:22 PM	36	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:24:26 PM	9	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:24:26 PM	3	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:24:26 PM	1	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	82	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:00 PM	9	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	3	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	3	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:25:00 PM	11	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	8	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	3	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	3	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:25:00 PM	3	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	3	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	11	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	2	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:25:00 PM	29	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:25:08 PM	85	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	10	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	1	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	1	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	11	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	11	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:25:08 PM	31	1282.00	TQEX
GENMAB A/S	03-Apr-2025	15:26:09 PM	42	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:27:04 PM	12	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:04 PM	11	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:04 PM	17	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:04 PM	63	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:04 PM	8	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:04 PM	36	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:06 PM	36	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:27:50 PM	6	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:27:50 PM	43	1285.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:00 PM	47	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:28:00 PM	1	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:28:00 PM	1	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:28:00 PM	59	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:28:19 PM	87	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	45	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	1	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	1	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	23	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	41	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	46	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:19 PM	37	1287.00	TQEX
GENMAB A/S	03-Apr-2025	15:28:19 PM	81	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:28:19 PM	32	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:28:19 PM	10	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:28:19 PM	78	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:28:19 PM	87	1287.00	CEUX
GENMAB A/S	03-Apr-2025	15:28:19 PM	34	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:28:19 PM	20	1286.50	AQEU
GENMAB A/S	03-Apr-2025	15:28:32 PM	87	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:32 PM	27	1289.00	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:28:32 PM	11	1289.00	CEUX
GENMAB A/S	03-Apr-2025	15:28:32 PM	71	1289.00	CEUX
GENMAB A/S	03-Apr-2025	15:28:32 PM	25	1288.50	AQEU
GENMAB A/S	03-Apr-2025	15:28:33 PM	46	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:33 PM	41	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:33 PM	24	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:28:33 PM	11	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:03 PM	24	1288.50	AQEU
GENMAB A/S	03-Apr-2025	15:29:21 PM	87	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:21 PM	37	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:21 PM	11	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:21 PM	41	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:21 PM	24	1288.00	TQEX
GENMAB A/S	03-Apr-2025	15:29:22 PM	38	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:26 PM	9	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:29:27 PM	82	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:29:58 PM	12	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:30:00 PM	26	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:00 PM	56	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:00 PM	3	1289.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:00 PM	3	1289.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:00 PM	4	1289.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:00 PM	4	1289.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:01 PM	26	1292.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:01 PM	58	1292.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:01 PM	82	1291.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:03 PM	30	1292.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:03 PM	41	1292.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:03 PM	83	1291.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:03 PM	5	1290.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:03 PM	82	1290.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:03 PM	24	1291.00	TQEX
GENMAB A/S	03-Apr-2025	15:30:03 PM	26	1291.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:03 PM	70	1290.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:03 PM	11	1290.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:15 PM	87	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:15 PM	45	1291.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:15 PM	41	1291.50	XCSE
GENMAB A/S	03-Apr-2025	15:30:15 PM	24	1291.50	TQEX
GENMAB A/S	03-Apr-2025	15:30:15 PM	33	1291.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:24 PM	41	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:24 PM	13	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:24 PM	12	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:24 PM	11	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:24 PM	20	1290.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:30:24 PM	5	1290.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:24 PM	20	1290.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:31 PM	19	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:31 PM	11	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:31 PM	56	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:50 PM	41	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:50 PM	15	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:50 PM	30	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:50 PM	25	1291.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:50 PM	29	1290.50	TQEX
GENMAB A/S	03-Apr-2025	15:30:50 PM	5	1290.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:51 PM	86	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:51 PM	27	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:30:51 PM	82	1289.50	CEUX
GENMAB A/S	03-Apr-2025	15:30:51 PM	31	1289.50	AQEU
GENMAB A/S	03-Apr-2025	15:31:03 PM	87	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:03 PM	42	1289.50	CEUX
GENMAB A/S	03-Apr-2025	15:31:10 PM	25	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:31:14 PM	73	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:14 PM	10	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:14 PM	3	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:14 PM	26	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:14 PM	24	1287.50	TQEX
GENMAB A/S	03-Apr-2025	15:31:14 PM	59	1287.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:14 PM	28	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:31:15 PM	3	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:15 PM	4	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:15 PM	2	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:25 PM	46	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:25 PM	10	1286.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:26 PM	34	1286.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:42 PM	8	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	76	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	82	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	12	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	10	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	46	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	15	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	4	1284.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:43 PM	24	1284.00	TQEX
GENMAB A/S	03-Apr-2025	15:31:43 PM	32	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:31:43 PM	15	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:31:43 PM	1	1284.50	CEUX
GENMAB A/S	03-Apr-2025	15:31:43 PM	25	1284.00	AQEU
GENMAB A/S	03-Apr-2025	15:31:44 PM	6	1283.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:31:44 PM	9	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:44 PM	15	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:44 PM	2	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:44 PM	15	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:44 PM	13	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:44 PM	7	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:44 PM	13	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:45 PM	4	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:45 PM	3	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:45 PM	46	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:31:45 PM	1	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:31:46 PM	27	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:32:35 PM	86	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:41 PM	25	1285.00	CEUX
GENMAB A/S	03-Apr-2025	15:32:46 PM	41	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:46 PM	15	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:46 PM	2	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:46 PM	45	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:46 PM	20	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:32:46 PM	4	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:32:50 PM	81	1285.00	XCSE
GENMAB A/S	03-Apr-2025	15:32:50 PM	30	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:50 PM	20	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:50 PM	11	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:50 PM	24	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:50 PM	26	1285.50	XCSE
GENMAB A/S	03-Apr-2025	15:32:50 PM	20	1284.50	TQEX
GENMAB A/S	03-Apr-2025	15:32:50 PM	4	1285.00	CEUX
GENMAB A/S	03-Apr-2025	15:32:50 PM	20	1285.00	CEUX
GENMAB A/S	03-Apr-2025	15:32:50 PM	34	1285.00	CEUX
GENMAB A/S	03-Apr-2025	15:32:50 PM	25	1285.00	AQEU
GENMAB A/S	03-Apr-2025	15:33:29 PM	81	1286.00	XCSE
GENMAB A/S	03-Apr-2025	15:33:29 PM	15	1286.00	XCSE
GENMAB A/S	03-Apr-2025	15:33:29 PM	2	1286.00	XCSE
GENMAB A/S	03-Apr-2025	15:33:29 PM	3	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:33:29 PM	2	1285.50	CEUX
GENMAB A/S	03-Apr-2025	15:33:29 PM	32	1286.00	AQEU
GENMAB A/S	03-Apr-2025	15:33:41 PM	4	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:33:41 PM	4	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:33:41 PM	2	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:33:41 PM	4	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:33:41 PM	32	1285.50	CEUX
GENMAB A/S	03-Apr-2025	15:33:41 PM	10	1285.50	CEUX
GENMAB A/S	03-Apr-2025	15:33:41 PM	7	1285.50	CEUX
GENMAB A/S	03-Apr-2025	15:33:41 PM	12	1285.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:33:44 PM	10	1285.50	CEUX
GENMAB A/S	03-Apr-2025	15:33:44 PM	15	1285.50	CEUX
GENMAB A/S	03-Apr-2025	15:34:10 PM	41	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:34:10 PM	12	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:34:10 PM	10	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:34:10 PM	43	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:34:10 PM	40	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:34:29 PM	81	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:34:32 PM	82	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:34:32 PM	50	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:34:32 PM	15	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:34:32 PM	28	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:34:32 PM	15	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:34:32 PM	3	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:34:32 PM	2	1287.50	TQEX
GENMAB A/S	03-Apr-2025	15:34:32 PM	10	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:34:32 PM	10	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:35:07 PM	81	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	41	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	5	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	41	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	2	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:07 PM	33	1289.50	TQEX
GENMAB A/S	03-Apr-2025	15:35:07 PM	84	1290.00	CEUX
GENMAB A/S	03-Apr-2025	15:35:07 PM	32	1289.50	CEUX
GENMAB A/S	03-Apr-2025	15:35:07 PM	8	1289.50	AQEU
GENMAB A/S	03-Apr-2025	15:35:07 PM	16	1289.50	AQEU
GENMAB A/S	03-Apr-2025	15:35:07 PM	7	1289.50	AQEU
GENMAB A/S	03-Apr-2025	15:35:20 PM	32	1289.50	TQEX
GENMAB A/S	03-Apr-2025	15:35:20 PM	23	1289.50	AQEU
GENMAB A/S	03-Apr-2025	15:35:27 PM	12	1289.50	CEUX
GENMAB A/S	03-Apr-2025	15:35:40 PM	84	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:40 PM	10	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:40 PM	18	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:35:40 PM	37	1288.50	TQEX
GENMAB A/S	03-Apr-2025	15:35:40 PM	2	1289.00	CEUX
GENMAB A/S	03-Apr-2025	15:35:40 PM	79	1289.00	CEUX
GENMAB A/S	03-Apr-2025	15:35:40 PM	3	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:35:40 PM	63	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:35:40 PM	5	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:35:40 PM	5	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:36:11 PM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:11 PM	71	1290.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:36:12 PM	41	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:12 PM	30	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:12 PM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:12 PM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:12 PM	11	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:12 PM	2	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:12 PM	45	1290.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:17 PM	25	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:17 PM	62	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:17 PM	26	1289.00	TQEX
GENMAB A/S	03-Apr-2025	15:36:17 PM	85	1289.00	CEUX
GENMAB A/S	03-Apr-2025	15:36:17 PM	20	1289.00	AQEU
GENMAB A/S	03-Apr-2025	15:36:17 PM	11	1289.00	AQEU
GENMAB A/S	03-Apr-2025	15:36:30 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	7	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	5	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	12	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	8	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	41	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	7	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	30	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	18	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:36:30 PM	6	1288.00	CEUX
GENMAB A/S	03-Apr-2025	15:36:31 PM	20	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:36:44 PM	41	1289.50	XCSE
GENMAB A/S	03-Apr-2025	15:36:44 PM	12	1289.50	XCSE
GENMAB A/S	03-Apr-2025	15:36:47 PM	4	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:08 PM	84	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:08 PM	60	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:08 PM	86	1289.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:08 PM	5	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:08 PM	15	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:08 PM	20	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:08 PM	18	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:08 PM	5	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:09 PM	28	1289.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	19	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	3	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	11	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	26	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	21	1288.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:37:31 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	11	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	35	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:37:31 PM	24	1288.50	TQEX
GENMAB A/S	03-Apr-2025	15:37:31 PM	3	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:37:34 PM	88	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:37:34 PM	15	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:38:11 PM	86	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:38:11 PM	27	1288.50	TQEX
GENMAB A/S	03-Apr-2025	15:38:11 PM	1	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:38:11 PM	12	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:38:11 PM	73	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:38:11 PM	25	1288.50	AQEU
GENMAB A/S	03-Apr-2025	15:38:44 PM	7	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:38:55 PM	19	1288.50	AQEU
GENMAB A/S	03-Apr-2025	15:39:05 PM	43	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:12 PM	87	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	3	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	3	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	4	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	3	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	2	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	9	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	3	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	3	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	15	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	40	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	19	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	5	1288.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:12 PM	10	1287.00	TQEX
GENMAB A/S	03-Apr-2025	15:39:12 PM	15	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:12 PM	21	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:12 PM	9	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:12 PM	1	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:12 PM	75	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:22 PM	20	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:32 PM	10	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:32 PM	58	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:49 PM	85	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:49 PM	41	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:39:49 PM	14	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:39:49 PM	11	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:39:49 PM	41	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:39:49 PM	20	1287.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:39:49 PM	19	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:39:49 PM	20	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:49 PM	20	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:39:49 PM	32	1287.00	AQEU
GENMAB A/S	03-Apr-2025	15:39:58 PM	15	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:39:58 PM	11	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:39:58 PM	41	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:40:01 PM	12	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:40:01 PM	41	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:40:01 PM	6	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:40:02 PM	11	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:40:49 PM	36	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	41	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	12	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	21	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	2	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	46	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	12	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	30	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:07 PM	17	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:41:07 PM	31	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:41:07 PM	15	1286.00	AQEU
GENMAB A/S	03-Apr-2025	15:41:07 PM	5	1286.00	AQEU
GENMAB A/S	03-Apr-2025	15:41:08 PM	41	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:08 PM	12	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:41:08 PM	12	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:42:02 PM	88	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:42:02 PM	41	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:42:02 PM	35	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:42:02 PM	35	1288.50	XCSE
GENMAB A/S	03-Apr-2025	15:42:02 PM	28	1288.00	TQEX
GENMAB A/S	03-Apr-2025	15:42:02 PM	88	1288.50	CEUX
GENMAB A/S	03-Apr-2025	15:42:19 PM	88	1287.50	XCSE
GENMAB A/S	03-Apr-2025	15:42:23 PM	85	1287.50	CEUX
GENMAB A/S	03-Apr-2025	15:42:23 PM	32	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:42:27 PM	3	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:42:28 PM	8	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:42:42 PM	16	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:42:42 PM	68	1287.00	XCSE
GENMAB A/S	03-Apr-2025	15:42:42 PM	24	1287.50	AQEU
GENMAB A/S	03-Apr-2025	15:42:47 PM	31	1286.50	XCSE
GENMAB A/S	03-Apr-2025	15:42:47 PM	31	1286.50	TQEX
GENMAB A/S	03-Apr-2025	15:42:47 PM	17	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:42:47 PM	14	1286.50	CEUX
GENMAB A/S	03-Apr-2025	15:42:47 PM	51	1286.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:43:19 PM	68	1286.00	XCSE
GENMAB A/S	03-Apr-2025	15:43:49 PM	20	1286.00	XCSE
GENMAB A/S	03-Apr-2025	15:43:49 PM	14	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:43:50 PM	10	1285.50	TQEX
GENMAB A/S	03-Apr-2025	15:44:10 PM	13	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:44:10 PM	72	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:44:10 PM	16	1284.50	XCSE
GENMAB A/S	03-Apr-2025	15:44:10 PM	86	1285.00	CEUX
GENMAB A/S	03-Apr-2025	15:44:10 PM	38	1284.00	CEUX
GENMAB A/S	03-Apr-2025	15:44:10 PM	29	1285.00	AQEU
GENMAB A/S	03-Apr-2025	15:44:15 PM	21	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:44:15 PM	61	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:44:15 PM	20	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:44:15 PM	85	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:44:15 PM	29	1284.00	TQEX
GENMAB A/S	03-Apr-2025	15:44:15 PM	26	1283.00	TQEX
GENMAB A/S	03-Apr-2025	15:44:15 PM	47	1284.00	CEUX
GENMAB A/S	03-Apr-2025	15:44:15 PM	81	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:44:18 PM	59	1282.00	CEUX
GENMAB A/S	03-Apr-2025	15:44:18 PM	26	1282.00	CEUX
GENMAB A/S	03-Apr-2025	15:45:09 PM	82	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:45:09 PM	82	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:45:59 PM	1	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:46:27 PM	9	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:46:59 PM	24	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:47:05 PM	32	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:47:22 PM	16	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	66	1283.00	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	41	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	2	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	2	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	10	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	38	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	18	1283.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:22 PM	33	1283.00	TQEX
GENMAB A/S	03-Apr-2025	15:47:22 PM	39	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:47:22 PM	44	1283.00	CEUX
GENMAB A/S	03-Apr-2025	15:47:22 PM	20	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:47:22 PM	6	1283.00	AQEU
GENMAB A/S	03-Apr-2025	15:47:26 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:26 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:47:26 PM	28	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:47:26 PM	17	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:47:39 PM	54	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:47:40 PM	4	1282.00	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:47:40 PM	20	1282.00	TQEX
GENMAB A/S	03-Apr-2025	15:47:40 PM	58	1282.00	CEUX
GENMAB A/S	03-Apr-2025	15:47:45 PM	9	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:02 PM	34	1282.00	TQEX
GENMAB A/S	03-Apr-2025	15:48:26 PM	21	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:30 PM	9	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:30 PM	13	1281.50	AQEU
GENMAB A/S	03-Apr-2025	15:48:31 PM	33	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:31 PM	42	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	30	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	3	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	45	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	13	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	13	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	13	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:41 PM	36	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:48:41 PM	36	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:48:41 PM	22	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:48:45 PM	15	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:48:50 PM	20	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:48:56 PM	25	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:56 PM	34	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:48:56 PM	10	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:48:56 PM	10	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:48:56 PM	31	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:49:35 PM	26	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:49:35 PM	29	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:50:09 PM	2	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:50:29 PM	26	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	55	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	30	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	15	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	2	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	2	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	20	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	10	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:50:29 PM	36	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:50:29 PM	5	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:51:02 PM	41	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:02 PM	14	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:02 PM	41	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:02 PM	21	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:02 PM	36	1282.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:51:02 PM	36	1282.00	CEUX
GENMAB A/S	03-Apr-2025	15:51:02 PM	34	1282.00	CEUX
GENMAB A/S	03-Apr-2025	15:51:02 PM	10	1281.50	AQEU
GENMAB A/S	03-Apr-2025	15:51:02 PM	10	1281.50	AQEU
GENMAB A/S	03-Apr-2025	15:51:02 PM	7	1281.50	AQEU
GENMAB A/S	03-Apr-2025	15:51:03 PM	45	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:03 PM	12	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:03 PM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:03 PM	13	1282.00	CEUX
GENMAB A/S	03-Apr-2025	15:51:04 PM	9	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:04 PM	9	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	37	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	16	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	30	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	20	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:07 PM	29	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:51:07 PM	9	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:51:07 PM	77	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:51:08 PM	17	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:08 PM	18	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:08 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:08 PM	35	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:08 PM	16	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:08 PM	20	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:12 PM	14	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:12 PM	20	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:26 PM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:27 PM	30	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:27 PM	2	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:27 PM	45	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:27 PM	16	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:27 PM	30	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:28 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:29 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:32 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:32 PM	6	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:35 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:45 PM	84	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:45 PM	41	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:45 PM	30	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:45 PM	12	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:45 PM	10	1280.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:51:45 PM	29	1280.50	TQEX
GENMAB A/S	03-Apr-2025	15:51:45 PM	82	1280.50	CEUX
GENMAB A/S	03-Apr-2025	15:51:45 PM	34	1280.00	AQEU
GENMAB A/S	03-Apr-2025	15:51:46 PM	4	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:46 PM	8	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:46 PM	17	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:46 PM	20	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:46 PM	13	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:46 PM	5	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:47 PM	11	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:51 PM	11	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:51 PM	11	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:55 PM	10	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:55 PM	53	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:51:57 PM	9	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:58 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:58 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:51:58 PM	7	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:52:08 PM	17	1281.50	XCSE
GENMAB A/S	03-Apr-2025	15:52:31 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:52:31 PM	1	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:52:31 PM	35	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:52:31 PM	14	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:52:31 PM	11	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:52:31 PM	27	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:53:00 PM	1	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:00 PM	20	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:00 PM	23	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:00 PM	39	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:00 PM	16	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:00 PM	8	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:00 PM	31	1282.50	TQEX
GENMAB A/S	03-Apr-2025	15:53:00 PM	87	1282.50	CEUX
GENMAB A/S	03-Apr-2025	15:53:00 PM	14	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:53:08 PM	19	1282.50	XCSE
GENMAB A/S	03-Apr-2025	15:53:12 PM	33	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:12 PM	12	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:12 PM	31	1282.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:12 PM	5	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:53:12 PM	11	1282.00	AQEU
GENMAB A/S	03-Apr-2025	15:53:13 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:13 PM	25	1281.50	TQEX
GENMAB A/S	03-Apr-2025	15:53:13 PM	79	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:53:24 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:55 PM	15	1281.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:53:55 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:55 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:55 PM	28	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:55 PM	33	1281.50	CEUX
GENMAB A/S	03-Apr-2025	15:53:55 PM	16	1281.00	AQEU
GENMAB A/S	03-Apr-2025	15:53:55 PM	8	1281.00	AQEU
GENMAB A/S	03-Apr-2025	15:53:58 PM	41	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:58 PM	21	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:53:58 PM	26	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:54:02 PM	41	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:02 PM	20	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:02 PM	31	1280.50	TQEX
GENMAB A/S	03-Apr-2025	15:54:02 PM	41	1280.50	CEUX
GENMAB A/S	03-Apr-2025	15:54:02 PM	45	1280.50	CEUX
GENMAB A/S	03-Apr-2025	15:54:12 PM	7	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	3	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	1	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	3	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	8	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	3	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	3	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	38	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	13	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	3	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	2	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:54:12 PM	24	1280.00	AQEU
GENMAB A/S	03-Apr-2025	15:54:17 PM	19	1279.00	CEUX
GENMAB A/S	03-Apr-2025	15:54:17 PM	66	1279.00	CEUX
GENMAB A/S	03-Apr-2025	15:54:17 PM	3	1279.00	CEUX
GENMAB A/S	03-Apr-2025	15:54:17 PM	31	1279.00	AQEU
GENMAB A/S	03-Apr-2025	15:54:27 PM	35	1279.00	XCSE
GENMAB A/S	03-Apr-2025	15:55:10 PM	30	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:25 PM	75	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:55:25 PM	8	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:55:25 PM	3	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:55:54 PM	35	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	17	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	1	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	1	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	34	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	41	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:55:59 PM	24	1279.50	TQEX
GENMAB A/S	03-Apr-2025	15:55:59 PM	11	1279.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:55:59 PM	10	1279.50	CEUX
GENMAB A/S	03-Apr-2025	15:55:59 PM	62	1279.50	CEUX
GENMAB A/S	03-Apr-2025	15:56:04 PM	111	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:56:19 PM	83	1279.50	CEUX
GENMAB A/S	03-Apr-2025	15:56:23 PM	8	1279.50	AQEU
GENMAB A/S	03-Apr-2025	15:56:24 PM	7	1279.50	AQEU
GENMAB A/S	03-Apr-2025	15:56:25 PM	12	1279.50	AQEU
GENMAB A/S	03-Apr-2025	15:56:35 PM	41	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:56:35 PM	1	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:56:35 PM	11	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:56:35 PM	12	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:56:47 PM	10	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:56:47 PM	25	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:56:49 PM	9	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:56:53 PM	6	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:56:53 PM	41	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:56:53 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:56:53 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:56:53 PM	1	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:57:21 PM	82	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:21 PM	26	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:21 PM	16	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:26 PM	15	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:26 PM	8	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:26 PM	18	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	10	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	1	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	1	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	10	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	12	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	13	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:30 PM	43	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:57:31 PM	41	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	12	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	10	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	22	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	26	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	8	1280.00	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	10	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	10	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	41	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	33	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	9	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	13	1280.00	XCSE
GENMAB A/S	03-Apr-2025	15:57:31 PM	10	1280.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:57:34 PM	11	1280.00	XCSE
GENMAB A/S	03-Apr-2025	15:57:34 PM	12	1280.00	XCSE
GENMAB A/S	03-Apr-2025	15:57:34 PM	11	1279.50	AQEU
GENMAB A/S	03-Apr-2025	15:57:39 PM	13	1280.00	XCSE
GENMAB A/S	03-Apr-2025	15:57:56 PM	30	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:57:57 PM	53	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:58:19 PM	27	1279.50	TQEX
GENMAB A/S	03-Apr-2025	15:58:28 PM	22	1279.50	AQEU
GENMAB A/S	03-Apr-2025	15:59:09 PM	78	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:59:09 PM	7	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:59:13 PM	7	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:13 PM	83	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:13 PM	18	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:13 PM	5	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:13 PM	5	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:26 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:26 PM	20	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:26 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:26 PM	45	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:26 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:26 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:26 PM	14	1281.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:29 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:29 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:30 PM	45	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:30 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:30 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:30 PM	14	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:31 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:32 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	30	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	30	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:35 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:36 PM	30	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:36 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:36 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:38 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:38 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:38 PM	53	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:38 PM	32	1281.00	XCSE
GENMAB A/S	03-Apr-2025	15:59:38 PM	5	1281.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	15:59:38 PM	7	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:49 PM	83	1280.50	XCSE
GENMAB A/S	03-Apr-2025	15:59:49 PM	14	1280.50	AQEU
GENMAB A/S	03-Apr-2025	15:59:49 PM	10	1280.50	AQEU
GENMAB A/S	03-Apr-2025	15:59:58 PM	84	1279.50	XCSE
GENMAB A/S	03-Apr-2025	15:59:58 PM	43	1280.00	TQEX
GENMAB A/S	03-Apr-2025	15:59:58 PM	75	1280.00	CEUX
GENMAB A/S	03-Apr-2025	15:59:58 PM	24	1279.50	AQEU
GENMAB A/S	03-Apr-2025	16:00:00 PM	22	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:00 PM	1	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:00 PM	59	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:00 PM	24	1280.50	TQEX
GENMAB A/S	03-Apr-2025	16:00:00 PM	87	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:00:05 PM	24	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:05 PM	19	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:07 PM	60	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:07 PM	10	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:07 PM	6	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:07 PM	26	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:07 PM	25	1279.50	TQEX
GENMAB A/S	03-Apr-2025	16:00:19 PM	47	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:19 PM	4	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:19 PM	15	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:19 PM	12	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:26 PM	37	1279.50	CEUX
GENMAB A/S	03-Apr-2025	16:00:39 PM	28	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:39 PM	9	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:39 PM	19	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:39 PM	7	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:00:45 PM	83	1279.50	XCSE
GENMAB A/S	03-Apr-2025	16:00:51 PM	83	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:00:51 PM	11	1279.00	AQEU
GENMAB A/S	03-Apr-2025	16:00:51 PM	22	1279.00	AQEU
GENMAB A/S	03-Apr-2025	16:01:03 PM	15	1278.50	XCSE
GENMAB A/S	03-Apr-2025	16:01:03 PM	33	1278.50	XCSE
GENMAB A/S	03-Apr-2025	16:01:03 PM	34	1278.50	XCSE
GENMAB A/S	03-Apr-2025	16:01:03 PM	28	1278.50	TQEX
GENMAB A/S	03-Apr-2025	16:01:25 PM	81	1278.00	CEUX
GENMAB A/S	03-Apr-2025	16:01:26 PM	8	1277.00	TQEX
GENMAB A/S	03-Apr-2025	16:01:27 PM	7	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:01:27 PM	12	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:01:27 PM	25	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:01:37 PM	3	1277.50	XCSE
GENMAB A/S	03-Apr-2025	16:01:37 PM	10	1277.00	CEUX
GENMAB A/S	03-Apr-2025	16:01:42 PM	4	1277.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:02:03 PM	8	1278.50	CEUX
GENMAB A/S	03-Apr-2025	16:02:19 PM	5	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:02:19 PM	18	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:02:19 PM	86	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:02:25 PM	41	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:25 PM	15	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:25 PM	10	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:25 PM	12	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:29 PM	12	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:41 PM	41	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:41 PM	12	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:41 PM	11	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:41 PM	39	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:41 PM	8	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:41 PM	34	1278.50	TQEX
GENMAB A/S	03-Apr-2025	16:02:41 PM	32	1278.50	CEUX
GENMAB A/S	03-Apr-2025	16:02:42 PM	30	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:42 PM	41	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:42 PM	11	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:42 PM	10	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:42 PM	19	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	10	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	10	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	41	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	38	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	12	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	13	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:02:49 PM	1	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:02:53 PM	17	1278.50	AQEU
GENMAB A/S	03-Apr-2025	16:02:53 PM	8	1278.50	AQEU
GENMAB A/S	03-Apr-2025	16:03:00 PM	12	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:00 PM	12	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:00 PM	12	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:00 PM	12	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:00 PM	12	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:00 PM	12	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:00 PM	4	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:26 PM	17	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:03:49 PM	51	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:01 PM	4	1278.00	TQEX
GENMAB A/S	03-Apr-2025	16:04:12 PM	5	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:04:12 PM	28	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:04:12 PM	78	1279.00	CEUX
GENMAB A/S	03-Apr-2025	16:04:22 PM	23	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:22 PM	21	1278.00	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:04:22 PM	72	1278.00	CEUX
GENMAB A/S	03-Apr-2025	16:04:22 PM	11	1278.00	CEUX
GENMAB A/S	03-Apr-2025	16:04:26 PM	35	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:26 PM	7	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:26 PM	48	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:26 PM	42	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:26 PM	21	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:26 PM	33	1277.50	AQEU
GENMAB A/S	03-Apr-2025	16:04:26 PM	17	1277.50	AQEU
GENMAB A/S	03-Apr-2025	16:04:27 PM	17	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:31 PM	39	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:31 PM	13	1278.00	XCSE
GENMAB A/S	03-Apr-2025	16:04:58 PM	20	1278.00	CEUX
GENMAB A/S	03-Apr-2025	16:05:19 PM	41	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:19 PM	15	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:19 PM	7	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:19 PM	7	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:19 PM	12	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:19 PM	29	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:19 PM	43	1278.50	TQEX
GENMAB A/S	03-Apr-2025	16:05:41 PM	2	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:45 PM	18	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:05:49 PM	28	1279.00	XCSE
GENMAB A/S	03-Apr-2025	16:06:07 PM	23	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:06:07 PM	13	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:06:12 PM	1	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:06:13 PM	17	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:06:47 PM	8	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:06:47 PM	36	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:06:48 PM	36	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:06:56 PM	36	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:07:03 PM	36	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:07:24 PM	86	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:07:24 PM	31	1280.50	AQEU
GENMAB A/S	03-Apr-2025	16:07:39 PM	84	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:08:17 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:17 PM	15	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:17 PM	45	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:17 PM	24	1281.00	TQEX
GENMAB A/S	03-Apr-2025	16:08:17 PM	36	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:08:17 PM	37	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:08:17 PM	33	1281.50	AQEU
GENMAB A/S	03-Apr-2025	16:08:26 PM	35	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:26 PM	27	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:33 PM	69	1281.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:08:33 PM	6	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:35 PM	12	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:35 PM	11	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:37 PM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:45 PM	18	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:45 PM	61	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:45 PM	12	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:08:45 PM	39	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:08:50 PM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:50 PM	10	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:08:51 PM	17	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:09:19 PM	82	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:19 PM	45	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:19 PM	8	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:19 PM	25	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:09:19 PM	27	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:09:19 PM	20	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:09:19 PM	64	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:09:22 PM	2	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:23 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:23 PM	41	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:23 PM	39	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:23 PM	4	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:32 PM	85	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:09:59 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:59 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:59 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:09:59 PM	12	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:00 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:00 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:11 PM	26	1280.50	XCSE
GENMAB A/S	03-Apr-2025	16:10:12 PM	4	1280.50	XCSE
GENMAB A/S	03-Apr-2025	16:10:22 PM	34	1280.00	TQEX
GENMAB A/S	03-Apr-2025	16:10:22 PM	26	1280.00	TQEX
GENMAB A/S	03-Apr-2025	16:10:22 PM	21	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:22 PM	41	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:22 PM	25	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:22 PM	34	1280.00	AQEU
GENMAB A/S	03-Apr-2025	16:10:24 PM	70	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:24 PM	8	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:24 PM	50	1279.50	XCSE
GENMAB A/S	03-Apr-2025	16:10:24 PM	15	1279.50	XCSE
GENMAB A/S	03-Apr-2025	16:10:24 PM	24	1279.00	TQEX
GENMAB A/S	03-Apr-2025	16:10:24 PM	14	1279.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:24 PM	2	1279.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:10:24 PM	69	1279.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:25 PM	1	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:25 PM	37	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:25 PM	41	1280.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:26 PM	30	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:10:27 PM	50	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:10:27 PM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:27 PM	19	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:27 PM	30	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:28 PM	4	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:29 PM	22	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:29 PM	2	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:29 PM	14	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	28	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	27	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	21	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	2	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	2	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	4	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	7	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	3	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:32 PM	29	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:33 PM	46	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:33 PM	32	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:10:33 PM	24	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:10:49 PM	20	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:10:49 PM	15	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:22 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:22 PM	3	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:22 PM	3	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:22 PM	3	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:22 PM	19	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:23 PM	34	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:26 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:26 PM	30	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:28 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:29 PM	8	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:29 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:29 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:29 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:11:29 PM	41	1282.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:11:35 PM	85	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:35 PM	45	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:35 PM	8	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:35 PM	4	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:35 PM	14	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:39 PM	11	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:50 PM	17	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:11:58 PM	7	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:12:00 PM	41	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:12:06 PM	36	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:12:10 PM	8	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:12:15 PM	8	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:12:17 PM	27	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:12:17 PM	12	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:12:19 PM	27	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:12:19 PM	27	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:12:20 PM	26	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:12:21 PM	82	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:12:21 PM	42	1281.00	TQEX
GENMAB A/S	03-Apr-2025	16:12:23 PM	35	1281.00	AQEU
GENMAB A/S	03-Apr-2025	16:12:37 PM	87	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:13:07 PM	84	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:13:07 PM	42	1282.50	TQEX
GENMAB A/S	03-Apr-2025	16:13:07 PM	85	1282.50	CEUX
GENMAB A/S	03-Apr-2025	16:13:07 PM	5	1282.00	AQEU
GENMAB A/S	03-Apr-2025	16:13:27 PM	25	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:13:39 PM	11	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:13:39 PM	23	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:13:39 PM	1	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:13:46 PM	69	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:13:46 PM	39	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:13:46 PM	16	1281.50	CEUX
GENMAB A/S	03-Apr-2025	16:14:26 PM	30	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:14:26 PM	12	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:26 PM	11	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:26 PM	41	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:26 PM	39	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:26 PM	8	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:36 PM	2	1280.50	AQEU
GENMAB A/S	03-Apr-2025	16:14:39 PM	9	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:39 PM	11	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:14:40 PM	17	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:15:00 PM	40	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:15:00 PM	42	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:15:17 PM	36	1281.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:15:17 PM	10	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:15:17 PM	37	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:15:17 PM	5	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	26	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	4	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	4	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	10	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	14	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	1	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	14	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	41	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:15:57 PM	81	1282.00	CEUX
GENMAB A/S	03-Apr-2025	16:16:08 PM	20	1281.50	AQEU
GENMAB A/S	03-Apr-2025	16:16:11 PM	27	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:19 PM	55	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:19 PM	83	1282.00	CEUX
GENMAB A/S	03-Apr-2025	16:16:29 PM	46	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:29 PM	11	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:29 PM	10	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:45 PM	3	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:46 PM	12	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:47 PM	14	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:16:59 PM	3	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:17:01 PM	8	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:17:04 PM	3	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:17:05 PM	3	1282.00	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	14	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	3	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	3	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	9	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:10 PM	24	1281.50	TQEX
GENMAB A/S	03-Apr-2025	16:17:10 PM	17	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:17:10 PM	12	1281.50	AQEU
GENMAB A/S	03-Apr-2025	16:17:29 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:29 PM	14	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:29 PM	27	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:49 PM	41	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:49 PM	8	1281.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:17:49 PM	20	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:49 PM	12	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:49 PM	5	1281.50	XCSE
GENMAB A/S	03-Apr-2025	16:17:59 PM	87	1281.00	XCSE
GENMAB A/S	03-Apr-2025	16:17:59 PM	70	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:17:59 PM	40	1281.00	CEUX
GENMAB A/S	03-Apr-2025	16:18:01 PM	17	1280.50	AQEU
GENMAB A/S	03-Apr-2025	16:18:19 PM	15	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:18:19 PM	32	1280.50	TQEX
GENMAB A/S	03-Apr-2025	16:18:19 PM	7	1280.50	AQEU
GENMAB A/S	03-Apr-2025	16:18:22 PM	68	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:18:25 PM	33	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:18:37 PM	45	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:18:47 PM	39	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:18:59 PM	44	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:18:59 PM	14	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:05 PM	50	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:19:05 PM	4	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:19:05 PM	8	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:19:09 PM	44	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:09 PM	17	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:29 PM	8	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:29 PM	42	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:35 PM	34	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:19:41 PM	12	1279.50	XCSE
GENMAB A/S	03-Apr-2025	16:19:47 PM	44	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:47 PM	62	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:19:55 PM	36	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:19:55 PM	35	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:20:09 PM	44	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:20:09 PM	8	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:20:09 PM	9	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:20:09 PM	5	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:20:09 PM	5	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:20:09 PM	8	1280.00	XCSE
GENMAB A/S	03-Apr-2025	16:20:09 PM	82	1279.50	XCSE
GENMAB A/S	03-Apr-2025	16:20:17 PM	81	1279.50	CEUX
GENMAB A/S	03-Apr-2025	16:20:34 PM	44	1280.00	CEUX
GENMAB A/S	03-Apr-2025	16:20:35 PM	5	1282.50	AQEU
GENMAB A/S	03-Apr-2025	16:20:56 PM	40	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:20:56 PM	52	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:20:56 PM	7	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:20:56 PM	66	1282.50	CEUX
GENMAB A/S	03-Apr-2025	16:20:56 PM	20	1282.50	AQEU
GENMAB A/S	03-Apr-2025	16:20:56 PM	13	1282.50	AQEU

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:21:02 PM	20	1282.50	CEUX
GENMAB A/S	03-Apr-2025	16:21:02 PM	43	1282.50	CEUX
GENMAB A/S	03-Apr-2025	16:21:26 PM	12	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:21:26 PM	8	1282.50	XCSE
GENMAB A/S	03-Apr-2025	16:21:55 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:21:55 PM	44	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:21:55 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:21:55 PM	38	1284.00	TQEX
GENMAB A/S	03-Apr-2025	16:22:05 PM	30	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:22:05 PM	36	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:22:49 PM	12	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:22:49 PM	71	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:22:49 PM	36	1285.50	CEUX
GENMAB A/S	03-Apr-2025	16:22:49 PM	33	1285.50	AQEU
GENMAB A/S	03-Apr-2025	16:23:16 PM	84	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:23:16 PM	24	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:23:16 PM	29	1286.50	AQEU
GENMAB A/S	03-Apr-2025	16:23:17 PM	8	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:23:17 PM	2	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:23:17 PM	31	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:23:17 PM	5	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:23:28 PM	26	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:24:04 PM	87	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	52	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	35	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	3	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	3	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	12	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	6	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	46	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	2	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	5	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	11	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	47	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:24:04 PM	40	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:24:04 PM	24	1286.50	AQEU
GENMAB A/S	03-Apr-2025	16:24:05 PM	23	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:24:26 PM	6	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:25:00 PM	80	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:25:00 PM	31	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:25:15 PM	36	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:25:21 PM	17	1289.50	XCSE
GENMAB A/S	03-Apr-2025	16:25:21 PM	65	1289.50	XCSE
GENMAB A/S	03-Apr-2025	16:25:21 PM	37	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:25:21 PM	52	1290.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:25:21 PM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:25:21 PM	19	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:25:21 PM	26	1289.50	TQEX
GENMAB A/S	03-Apr-2025	16:25:21 PM	23	1289.50	TQEX
GENMAB A/S	03-Apr-2025	16:25:21 PM	63	1289.50	CEUX
GENMAB A/S	03-Apr-2025	16:25:21 PM	21	1289.50	CEUX
GENMAB A/S	03-Apr-2025	16:25:21 PM	29	1289.50	AQEU
GENMAB A/S	03-Apr-2025	16:26:06 PM	31	1292.00	TQEX
GENMAB A/S	03-Apr-2025	16:26:06 PM	20	1292.00	AQEU
GENMAB A/S	03-Apr-2025	16:26:06 PM	10	1292.00	AQEU
GENMAB A/S	03-Apr-2025	16:26:21 PM	5	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:26:21 PM	17	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:26:21 PM	50	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:26:21 PM	39	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:26:21 PM	31	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:26:46 PM	40	1294.00	CEUX
GENMAB A/S	03-Apr-2025	16:26:55 PM	36	1294.00	CEUX
GENMAB A/S	03-Apr-2025	16:27:15 PM	2	1294.00	CEUX
GENMAB A/S	03-Apr-2025	16:27:15 PM	1	1294.00	CEUX
GENMAB A/S	03-Apr-2025	16:27:15 PM	35	1294.00	CEUX
GENMAB A/S	03-Apr-2025	16:27:19 PM	8	1294.00	XCSE
GENMAB A/S	03-Apr-2025	16:27:19 PM	12	1294.00	XCSE
GENMAB A/S	03-Apr-2025	16:27:19 PM	4	1294.00	XCSE
GENMAB A/S	03-Apr-2025	16:27:55 PM	20	1295.00	TQEX
GENMAB A/S	03-Apr-2025	16:27:55 PM	11	1295.00	TQEX
GENMAB A/S	03-Apr-2025	16:27:55 PM	25	1295.00	CEUX
GENMAB A/S	03-Apr-2025	16:27:55 PM	36	1295.00	CEUX
GENMAB A/S	03-Apr-2025	16:27:55 PM	34	1295.00	AQEU
GENMAB A/S	03-Apr-2025	16:27:57 PM	10	1295.00	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	88	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	45	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	52	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	14	1295.00	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	47	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	1	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	38	1295.00	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	12	1295.00	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	10	1295.00	XCSE
GENMAB A/S	03-Apr-2025	16:28:00 PM	85	1294.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:25 PM	31	1294.00	TQEX
GENMAB A/S	03-Apr-2025	16:28:25 PM	2	1293.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:28 PM	3	1293.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:29 PM	3	1293.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:39 PM	35	1293.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:52 PM	35	1294.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:28:52 PM	11	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:52 PM	37	1294.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:52 PM	39	1294.00	TQEX
GENMAB A/S	03-Apr-2025	16:28:52 PM	15	1294.00	CEUX
GENMAB A/S	03-Apr-2025	16:28:52 PM	33	1294.00	AQEU
GENMAB A/S	03-Apr-2025	16:28:52 PM	1	1294.00	AQEU
GENMAB A/S	03-Apr-2025	16:28:54 PM	2	1293.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:55 PM	11	1294.00	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	22	1293.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	28	1293.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	45	1293.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	46	1293.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	20	1293.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	84	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:28:55 PM	74	1293.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:55 PM	35	1292.50	CEUX
GENMAB A/S	03-Apr-2025	16:28:55 PM	49	1292.50	CEUX
GENMAB A/S	03-Apr-2025	16:29:08 PM	52	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:29:08 PM	30	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:29:08 PM	29	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:29:08 PM	82	1291.00	XCSE
GENMAB A/S	03-Apr-2025	16:29:08 PM	43	1291.00	CEUX
GENMAB A/S	03-Apr-2025	16:29:16 PM	34	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:29:16 PM	2	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:29:22 PM	44	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:30:03 PM	23	1291.50	CEUX
GENMAB A/S	03-Apr-2025	16:30:15 PM	45	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:15 PM	1	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:15 PM	1	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:15 PM	14	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:15 PM	35	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:15 PM	5	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:15 PM	10	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:44 PM	83	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:30:44 PM	47	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:30:44 PM	52	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:30:44 PM	12	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:30:44 PM	29	1292.00	TQEX
GENMAB A/S	03-Apr-2025	16:30:44 PM	82	1292.50	CEUX
GENMAB A/S	03-Apr-2025	16:30:44 PM	8	1291.50	CEUX
GENMAB A/S	03-Apr-2025	16:30:44 PM	12	1291.50	CEUX
GENMAB A/S	03-Apr-2025	16:30:44 PM	36	1292.00	AQEU
GENMAB A/S	03-Apr-2025	16:30:45 PM	18	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:45 PM	26	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:30:45 PM	67	1292.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:30:52 PM	61	1292.50	XCSE
GENMAB A/S	03-Apr-2025	16:30:52 PM	10	1292.50	CEUX
GENMAB A/S	03-Apr-2025	16:30:52 PM	53	1292.50	CEUX
GENMAB A/S	03-Apr-2025	16:31:26 PM	9	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:31:26 PM	10	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:31:26 PM	84	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:31:27 PM	3	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:31:27 PM	17	1291.50	CEUX
GENMAB A/S	03-Apr-2025	16:31:28 PM	8	1291.00	TQEX
GENMAB A/S	03-Apr-2025	16:31:28 PM	16	1291.00	TQEX
GENMAB A/S	03-Apr-2025	16:31:38 PM	84	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:31:38 PM	6	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:31:38 PM	18	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:31:38 PM	32	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:31:38 PM	30	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:32:19 PM	55	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:32:27 PM	44	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:33:09 PM	38	1289.50	TQEX
GENMAB A/S	03-Apr-2025	16:33:09 PM	36	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:33:26 PM	26	1289.50	XCSE
GENMAB A/S	03-Apr-2025	16:33:36 PM	24	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:33:36 PM	52	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:33:36 PM	3	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:33:36 PM	3	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:33:36 PM	14	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:33:36 PM	26	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:33:36 PM	36	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:33:36 PM	36	1289.00	AQEU
GENMAB A/S	03-Apr-2025	16:33:49 PM	10	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:33:52 PM	17	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:34:14 PM	13	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:34:14 PM	45	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:34:14 PM	18	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:34:14 PM	8	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:34:14 PM	17	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:34:14 PM	39	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:35:27 PM	7	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:35:34 PM	40	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:35:34 PM	7	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:35:34 PM	28	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:35:34 PM	2	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:35:35 PM	40	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:35:35 PM	36	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:35:45 PM	9	1290.50	CEUX
GENMAB A/S	03-Apr-2025	16:36:13 PM	30	1292.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:36:13 PM	3	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:13 PM	3	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:13 PM	52	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:13 PM	14	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:13 PM	43	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:13 PM	11	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:13 PM	1	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:13 PM	29	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:15 PM	10	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:15 PM	52	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:15 PM	30	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:15 PM	17	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:25 PM	94	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:25 PM	10	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:28 PM	13	1292.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:29 PM	11	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:29 PM	17	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:29 PM	52	1292.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	85	1291.50	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	111	1291.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	88	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	45	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	52	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	14	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:36:37 PM	27	1291.50	TQEX
GENMAB A/S	03-Apr-2025	16:36:37 PM	25	1290.50	TQEX
GENMAB A/S	03-Apr-2025	16:36:37 PM	88	1291.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:37 PM	39	1291.50	AQEU
GENMAB A/S	03-Apr-2025	16:36:37 PM	19	1290.50	AQEU
GENMAB A/S	03-Apr-2025	16:36:37 PM	7	1290.50	AQEU
GENMAB A/S	03-Apr-2025	16:36:41 PM	8	1290.50	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	50	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	52	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	3	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	46	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	10	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	10	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	5	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:44 PM	80	1290.00	CEUX
GENMAB A/S	03-Apr-2025	16:36:45 PM	30	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:45 PM	14	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:45 PM	40	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:36:59 PM	36	1290.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:36:59 PM	38	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:19 PM	15	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:19 PM	43	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:19 PM	9	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:19 PM	8	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:19 PM	5	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:19 PM	9	1290.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:26 PM	24	1289.50	TQEX
GENMAB A/S	03-Apr-2025	16:37:29 PM	16	1289.50	XCSE
GENMAB A/S	03-Apr-2025	16:37:30 PM	85	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:37:45 PM	7	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:37:45 PM	2	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:37:46 PM	34	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:37:58 PM	25	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:37:58 PM	14	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:37:58 PM	29	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:37:58 PM	32	1288.50	TQEX
GENMAB A/S	03-Apr-2025	16:37:58 PM	49	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:38:18 PM	11	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:38:18 PM	27	1289.00	XCSE
GENMAB A/S	03-Apr-2025	16:39:13 PM	29	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:39:13 PM	40	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:39:13 PM	26	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:39:13 PM	45	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:39:13 PM	44	1289.00	AQEU
GENMAB A/S	03-Apr-2025	16:39:14 PM	36	1289.00	CEUX
GENMAB A/S	03-Apr-2025	16:39:21 PM	28	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:39:26 PM	36	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:39:45 PM	10	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:39:45 PM	32	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:39:59 PM	41	1288.00	TQEX
GENMAB A/S	03-Apr-2025	16:39:59 PM	6	1288.00	TQEX
GENMAB A/S	03-Apr-2025	16:40:23 PM	12	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:23 PM	18	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:23 PM	25	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:23 PM	25	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:40:34 PM	27	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:34 PM	23	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:34 PM	1	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:34 PM	10	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:34 PM	1	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:34 PM	58	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:40:34 PM	9	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:40:40 PM	36	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:40:48 PM	30	1288.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:40:48 PM	14	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	52	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	11	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	4	1288.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	1	1288.00	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	45	1288.00	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	10	1288.00	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	29	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:40:48 PM	36	1288.50	CEUX
GENMAB A/S	03-Apr-2025	16:40:50 PM	1	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:05 PM	11	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:05 PM	43	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:05 PM	26	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:05 PM	3	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:41:05 PM	33	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:41:05 PM	23	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:41:05 PM	16	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:41:06 PM	18	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:10 PM	11	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:10 PM	79	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:11 PM	18	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:26 PM	3	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:41:26 PM	67	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:41:26 PM	24	1287.50	TQEX
GENMAB A/S	03-Apr-2025	16:41:45 PM	88	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:41:51 PM	9	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:42:29 PM	15	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:42:29 PM	1	1287.50	TQEX
GENMAB A/S	03-Apr-2025	16:42:29 PM	25	1287.50	TQEX
GENMAB A/S	03-Apr-2025	16:42:29 PM	76	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:42:29 PM	13	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:42:35 PM	9	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:42:35 PM	27	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:42:55 PM	35	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:42:55 PM	13	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:43:05 PM	43	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:43:05 PM	14	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:43:05 PM	2	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:43:05 PM	30	1287.00	AQEU
GENMAB A/S	03-Apr-2025	16:43:15 PM	23	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:43:15 PM	34	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:43:15 PM	21	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:43:19 PM	44	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:43:19 PM	3	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:43:39 PM	35	1287.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:43:39 PM	36	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:43:40 PM	14	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:43:40 PM	26	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:44:04 PM	51	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:44:05 PM	20	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:44:05 PM	52	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:44:05 PM	10	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:44:05 PM	32	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:44:05 PM	3	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:44:09 PM	7	1287.00	AQEU
GENMAB A/S	03-Apr-2025	16:44:11 PM	1	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:45:26 PM	27	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:26 PM	40	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:26 PM	2	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:26 PM	39	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:27 PM	8	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:27 PM	16	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:28 PM	40	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:29 PM	40	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:29 PM	24	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:29 PM	36	1288.00	CEUX
GENMAB A/S	03-Apr-2025	16:45:39 PM	52	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:45:39 PM	18	1287.50	XCSE
GENMAB A/S	03-Apr-2025	16:45:39 PM	29	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:45:39 PM	34	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:45:39 PM	32	1287.50	CEUX
GENMAB A/S	03-Apr-2025	16:45:42 PM	6	1287.00	XCSE
GENMAB A/S	03-Apr-2025	16:45:46 PM	24	1287.00	TQEX
GENMAB A/S	03-Apr-2025	16:45:46 PM	24	1287.00	AQEU
GENMAB A/S	03-Apr-2025	16:46:05 PM	13	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:46:05 PM	44	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:46:05 PM	10	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:46:13 PM	31	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:46:14 PM	3	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:46:14 PM	3	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:46:14 PM	21	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:46:25 PM	10	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:46:25 PM	25	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:46:43 PM	30	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:46:43 PM	37	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:46:43 PM	61	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:46:43 PM	13	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:46:43 PM	43	1286.00	TQEX
GENMAB A/S	03-Apr-2025	16:46:43 PM	40	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:46:43 PM	19	1286.00	AQEU

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:46:43 PM	7	1286.00	AQEU
GENMAB A/S	03-Apr-2025	16:46:45 PM	23	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:46:55 PM	39	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:46:55 PM	7	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:47:05 PM	15	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:47:15 PM	43	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:47:15 PM	1	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:47:25 PM	28	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:47:25 PM	14	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:47:25 PM	25	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:47:26 PM	2	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:47:29 PM	61	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:47:38 PM	20	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:47:38 PM	3	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:47:38 PM	10	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:47:59 PM	27	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:47:59 PM	4	1286.50	TQEX
GENMAB A/S	03-Apr-2025	16:47:59 PM	40	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:47:59 PM	25	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:48:01 PM	40	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:48:08 PM	15	1285.50	TQEX
GENMAB A/S	03-Apr-2025	16:48:08 PM	15	1285.50	AQEU
GENMAB A/S	03-Apr-2025	16:48:08 PM	7	1285.50	AQEU
GENMAB A/S	03-Apr-2025	16:48:24 PM	9	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:48:24 PM	32	1285.50	TQEX
GENMAB A/S	03-Apr-2025	16:48:24 PM	41	1285.50	AQEU
GENMAB A/S	03-Apr-2025	16:48:25 PM	24	1285.50	CEUX
GENMAB A/S	03-Apr-2025	16:48:29 PM	12	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:48:29 PM	48	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:48:29 PM	36	1285.50	CEUX
GENMAB A/S	03-Apr-2025	16:48:35 PM	9	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:48:35 PM	6	1285.50	CEUX
GENMAB A/S	03-Apr-2025	16:49:02 PM	34	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:49:02 PM	13	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:21 PM	52	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:49:21 PM	10	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:21 PM	33	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:21 PM	11	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:21 PM	40	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:21 PM	9	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:46 PM	26	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:49:46 PM	16	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:49:46 PM	10	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:49:46 PM	5	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:49:46 PM	24	1286.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:49:46 PM	35	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:46 PM	2	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:46 PM	38	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:46 PM	14	1286.00	AQEU
GENMAB A/S	03-Apr-2025	16:49:47 PM	14	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:49:56 PM	38	1286.50	AQEU
GENMAB A/S	03-Apr-2025	16:50:03 PM	20	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:50:03 PM	32	1286.50	TQEX
GENMAB A/S	03-Apr-2025	16:50:03 PM	15	1286.50	TQEX
GENMAB A/S	03-Apr-2025	16:50:03 PM	38	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:50:03 PM	40	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:50:08 PM	47	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:25 PM	13	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:25 PM	50	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:35 PM	48	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:45 PM	11	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:45 PM	3	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:45 PM	10	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:45 PM	15	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:48 PM	35	1287.00	TQEX
GENMAB A/S	03-Apr-2025	16:50:55 PM	15	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:50:55 PM	13	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:05 PM	4	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:05 PM	47	1287.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:10 PM	1	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:51:10 PM	19	1286.50	TQEX
GENMAB A/S	03-Apr-2025	16:51:10 PM	14	1286.50	AQEU
GENMAB A/S	03-Apr-2025	16:51:11 PM	25	1286.50	XCSE
GENMAB A/S	03-Apr-2025	16:51:15 PM	24	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:51:15 PM	14	1286.50	AQEU
GENMAB A/S	03-Apr-2025	16:51:15 PM	15	1286.50	AQEU
GENMAB A/S	03-Apr-2025	16:51:25 PM	3	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:51:26 PM	10	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:26 PM	28	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:26 PM	10	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:26 PM	15	1286.50	TQEX
GENMAB A/S	03-Apr-2025	16:51:26 PM	9	1286.50	TQEX
GENMAB A/S	03-Apr-2025	16:51:26 PM	32	1286.50	CEUX
GENMAB A/S	03-Apr-2025	16:51:31 PM	33	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:31 PM	52	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:31 PM	14	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:31 PM	29	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:31 PM	32	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:31 PM	14	1286.00	AQEU
GENMAB A/S	03-Apr-2025	16:51:32 PM	38	1286.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:51:32 PM	17	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:32 PM	29	1286.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:41 PM	15	1286.00	AQEU
GENMAB A/S	03-Apr-2025	16:51:45 PM	5	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:45 PM	39	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:45 PM	25	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:55 PM	15	1286.00	TQEX
GENMAB A/S	03-Apr-2025	16:51:55 PM	42	1286.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:56 PM	52	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:51:56 PM	30	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:51:56 PM	14	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:51:56 PM	4	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:51:56 PM	35	1285.50	TQEX
GENMAB A/S	03-Apr-2025	16:51:56 PM	28	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:51:56 PM	25	1285.50	AQEU
GENMAB A/S	03-Apr-2025	16:51:56 PM	11	1285.50	AQEU
GENMAB A/S	03-Apr-2025	16:52:05 PM	24	1284.50	TQEX
GENMAB A/S	03-Apr-2025	16:52:05 PM	20	1284.50	AQEU
GENMAB A/S	03-Apr-2025	16:52:05 PM	1	1284.50	AQEU
GENMAB A/S	03-Apr-2025	16:52:05 PM	6	1284.50	AQEU
GENMAB A/S	03-Apr-2025	16:52:06 PM	35	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:52:06 PM	24	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:52:06 PM	11	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:52:08 PM	17	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:52:08 PM	10	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:52:15 PM	10	1284.50	CEUX
GENMAB A/S	03-Apr-2025	16:52:19 PM	41	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:52:20 PM	6	1284.50	CEUX
GENMAB A/S	03-Apr-2025	16:52:25 PM	3	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:52:25 PM	26	1284.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:00 PM	52	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:00 PM	15	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:00 PM	3	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:00 PM	3	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:00 PM	10	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:00 PM	12	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:05 PM	27	1285.00	TQEX
GENMAB A/S	03-Apr-2025	16:53:05 PM	71	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:27 PM	52	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:27 PM	38	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:27 PM	21	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:27 PM	37	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:27 PM	42	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:27 PM	24	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:27 PM	18	1285.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:53:27 PM	15	1285.00	AQEU
GENMAB A/S	03-Apr-2025	16:53:27 PM	2	1285.00	AQEU
GENMAB A/S	03-Apr-2025	16:53:28 PM	5	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:32 PM	10	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:34 PM	13	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:34 PM	12	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:40 PM	25	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:40 PM	38	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:40 PM	36	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:40 PM	7	1284.50	CEUX
GENMAB A/S	03-Apr-2025	16:53:40 PM	46	1284.50	CEUX
GENMAB A/S	03-Apr-2025	16:53:40 PM	14	1284.50	CEUX
GENMAB A/S	03-Apr-2025	16:53:40 PM	24	1284.50	AQEU
GENMAB A/S	03-Apr-2025	16:53:44 PM	9	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:44 PM	23	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:44 PM	38	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:44 PM	41	1285.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:44 PM	2	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:44 PM	36	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:44 PM	26	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:45 PM	7	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:45 PM	32	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:47 PM	32	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:53:48 PM	12	1284.50	AQEU
GENMAB A/S	03-Apr-2025	16:53:49 PM	42	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:52 PM	41	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:53:52 PM	23	1284.50	AQEU
GENMAB A/S	03-Apr-2025	16:53:56 PM	26	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:56 PM	10	1285.00	XCSE
GENMAB A/S	03-Apr-2025	16:53:59 PM	39	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:08 PM	17	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:54:08 PM	10	1285.00	CEUX
GENMAB A/S	03-Apr-2025	16:54:18 PM	27	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:19 PM	22	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:19 PM	30	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:20 PM	27	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:20 PM	15	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:23 PM	8	1284.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:37 PM	8	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:37 PM	17	1284.00	TQEX
GENMAB A/S	03-Apr-2025	16:54:37 PM	2	1284.00	TQEX
GENMAB A/S	03-Apr-2025	16:54:37 PM	5	1284.00	TQEX
GENMAB A/S	03-Apr-2025	16:54:38 PM	38	1283.50	XCSE
GENMAB A/S	03-Apr-2025	16:54:38 PM	10	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:40 PM	43	1283.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	03-Apr-2025	16:54:40 PM	41	1283.50	CEUX
GENMAB A/S	03-Apr-2025	16:54:44 PM	14	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:44 PM	6	1284.00	CEUX
GENMAB A/S	03-Apr-2025	16:54:45 PM	2	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:45 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:48 PM	3	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:48 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:49 PM	6	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:49 PM	3	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:49 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:49 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:50 PM	5	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:50 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:53 PM	8	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:53 PM	1	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:53 PM	2	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:56 PM	13	1284.00	XCSE
GENMAB A/S	03-Apr-2025	16:54:56 PM	2	1284.00	XCSE
GENMAB A/S	04-Apr-2025	09:46:20 AM	22	1288.50	XCSE
GENMAB A/S	04-Apr-2025	09:46:20 AM	58	1288.50	XCSE
GENMAB A/S	04-Apr-2025	09:46:20 AM	80	1288.50	AQEU
GENMAB A/S	04-Apr-2025	09:46:28 AM	25	1287.50	XCSE
GENMAB A/S	04-Apr-2025	09:46:28 AM	52	1287.50	XCSE
GENMAB A/S	04-Apr-2025	09:46:28 AM	80	1288.00	TQEX
GENMAB A/S	04-Apr-2025	09:46:28 AM	76	1288.00	CEUX
GENMAB A/S	04-Apr-2025	09:46:28 AM	70	1287.50	AQEU
GENMAB A/S	04-Apr-2025	09:46:47 AM	25	1289.50	XCSE
GENMAB A/S	04-Apr-2025	09:46:47 AM	23	1289.50	TQEX
GENMAB A/S	04-Apr-2025	09:46:47 AM	24	1289.50	AQEU
GENMAB A/S	04-Apr-2025	09:46:48 AM	24	1289.50	CEUX
GENMAB A/S	04-Apr-2025	09:46:48 AM	5	1289.50	CEUX
GENMAB A/S	04-Apr-2025	09:47:17 AM	8	1291.50	CEUX
GENMAB A/S	04-Apr-2025	09:47:32 AM	59	1291.50	XCSE
GENMAB A/S	04-Apr-2025	09:47:32 AM	42	1291.50	TQEX
GENMAB A/S	04-Apr-2025	09:47:32 AM	30	1291.50	CEUX
GENMAB A/S	04-Apr-2025	09:47:32 AM	27	1291.00	AQEU
GENMAB A/S	04-Apr-2025	09:47:38 AM	38	1290.50	XCSE
GENMAB A/S	04-Apr-2025	09:47:38 AM	39	1289.50	XCSE
GENMAB A/S	04-Apr-2025	09:47:38 AM	35	1290.50	TQEX
GENMAB A/S	04-Apr-2025	09:47:38 AM	45	1289.50	TQEX
GENMAB A/S	04-Apr-2025	09:47:38 AM	26	1290.50	CEUX
GENMAB A/S	04-Apr-2025	09:47:38 AM	43	1289.50	CEUX
GENMAB A/S	04-Apr-2025	09:49:24 AM	37	1293.00	XCSE
GENMAB A/S	04-Apr-2025	09:49:24 AM	22	1293.00	XCSE
GENMAB A/S	04-Apr-2025	09:49:24 AM	26	1293.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	09:49:24 AM	43	1293.00	CEUX
GENMAB A/S	04-Apr-2025	09:49:24 AM	24	1293.00	CEUX
GENMAB A/S	04-Apr-2025	09:49:25 AM	84	1292.00	XCSE
GENMAB A/S	04-Apr-2025	09:49:25 AM	64	1292.00	CEUX
GENMAB A/S	04-Apr-2025	09:49:33 AM	86	1292.00	XCSE
GENMAB A/S	04-Apr-2025	09:52:11 AM	60	1292.00	CEUX
GENMAB A/S	04-Apr-2025	09:52:12 AM	86	1292.00	XCSE
GENMAB A/S	04-Apr-2025	09:53:09 AM	90	1291.00	XCSE
GENMAB A/S	04-Apr-2025	09:53:09 AM	60	1291.00	CEUX
GENMAB A/S	04-Apr-2025	09:53:37 AM	88	1290.00	XCSE
GENMAB A/S	04-Apr-2025	09:53:37 AM	33	1289.50	CEUX
GENMAB A/S	04-Apr-2025	09:55:06 AM	46	1289.00	XCSE
GENMAB A/S	04-Apr-2025	09:55:06 AM	74	1289.50	CEUX
GENMAB A/S	04-Apr-2025	09:55:22 AM	49	1288.50	CEUX
GENMAB A/S	04-Apr-2025	09:56:35 AM	68	1288.50	CEUX
GENMAB A/S	04-Apr-2025	09:56:42 AM	41	1287.50	XCSE
GENMAB A/S	04-Apr-2025	09:56:42 AM	37	1287.50	CEUX
GENMAB A/S	04-Apr-2025	09:57:57 AM	79	1287.00	XCSE
GENMAB A/S	04-Apr-2025	09:57:57 AM	17	1286.00	XCSE
GENMAB A/S	04-Apr-2025	09:58:38 AM	79	1287.00	XCSE
GENMAB A/S	04-Apr-2025	09:59:26 AM	13	1286.00	XCSE
GENMAB A/S	04-Apr-2025	09:59:26 AM	12	1286.00	XCSE
GENMAB A/S	04-Apr-2025	10:01:19 AM	87	1287.00	XCSE
GENMAB A/S	04-Apr-2025	10:01:19 AM	76	1287.00	CEUX
GENMAB A/S	04-Apr-2025	10:01:19 AM	27	1287.00	AQEU
GENMAB A/S	04-Apr-2025	10:02:11 AM	83	1288.50	XCSE
GENMAB A/S	04-Apr-2025	10:02:18 AM	85	1288.00	XCSE
GENMAB A/S	04-Apr-2025	10:02:18 AM	87	1288.50	CEUX
GENMAB A/S	04-Apr-2025	10:02:30 AM	75	1287.00	XCSE
GENMAB A/S	04-Apr-2025	10:03:36 AM	46	1289.00	XCSE
GENMAB A/S	04-Apr-2025	10:03:36 AM	37	1289.00	XCSE
GENMAB A/S	04-Apr-2025	10:03:36 AM	16	1289.00	XCSE
GENMAB A/S	04-Apr-2025	10:03:36 AM	8	1289.00	XCSE
GENMAB A/S	04-Apr-2025	10:03:36 AM	6	1289.00	XCSE
GENMAB A/S	04-Apr-2025	10:04:05 AM	84	1288.00	XCSE
GENMAB A/S	04-Apr-2025	10:04:05 AM	8	1288.00	CEUX
GENMAB A/S	04-Apr-2025	10:04:05 AM	82	1288.00	CEUX
GENMAB A/S	04-Apr-2025	10:04:27 AM	14	1287.00	XCSE
GENMAB A/S	04-Apr-2025	10:04:27 AM	71	1287.00	CEUX
GENMAB A/S	04-Apr-2025	10:05:33 AM	85	1287.50	CEUX
GENMAB A/S	04-Apr-2025	10:05:49 AM	29	1287.00	XCSE
GENMAB A/S	04-Apr-2025	10:05:49 AM	56	1287.00	XCSE
GENMAB A/S	04-Apr-2025	10:06:14 AM	86	1286.00	XCSE
GENMAB A/S	04-Apr-2025	10:06:14 AM	10	1286.00	CEUX
GENMAB A/S	04-Apr-2025	10:06:14 AM	47	1286.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	10:06:32 AM	45	1286.00	XCSE
GENMAB A/S	04-Apr-2025	10:06:32 AM	34	1286.00	XCSE
GENMAB A/S	04-Apr-2025	10:06:49 AM	15	1285.00	CEUX
GENMAB A/S	04-Apr-2025	10:06:49 AM	72	1285.00	CEUX
GENMAB A/S	04-Apr-2025	10:07:07 AM	89	1284.50	XCSE
GENMAB A/S	04-Apr-2025	10:07:51 AM	85	1283.50	XCSE
GENMAB A/S	04-Apr-2025	10:07:51 AM	27	1284.00	XCSE
GENMAB A/S	04-Apr-2025	10:07:51 AM	20	1283.50	CEUX
GENMAB A/S	04-Apr-2025	10:07:51 AM	23	1283.50	CEUX
GENMAB A/S	04-Apr-2025	10:09:12 AM	33	1286.00	XCSE
GENMAB A/S	04-Apr-2025	10:09:27 AM	88	1287.50	XCSE
GENMAB A/S	04-Apr-2025	10:09:27 AM	46	1287.50	XCSE
GENMAB A/S	04-Apr-2025	10:09:27 AM	37	1287.50	XCSE
GENMAB A/S	04-Apr-2025	10:09:27 AM	20	1287.50	XCSE
GENMAB A/S	04-Apr-2025	10:09:27 AM	72	1287.50	CEUX
GENMAB A/S	04-Apr-2025	10:09:27 AM	16	1287.50	CEUX
GENMAB A/S	04-Apr-2025	10:09:36 AM	26	1288.50	TQEX
GENMAB A/S	04-Apr-2025	10:09:57 AM	89	1288.00	XCSE
GENMAB A/S	04-Apr-2025	10:09:57 AM	26	1288.00	TQEX
GENMAB A/S	04-Apr-2025	10:09:57 AM	23	1288.00	CEUX
GENMAB A/S	04-Apr-2025	10:10:07 AM	86	1287.00	XCSE
GENMAB A/S	04-Apr-2025	10:10:07 AM	86	1286.00	XCSE
GENMAB A/S	04-Apr-2025	10:10:07 AM	34	1286.50	TQEX
GENMAB A/S	04-Apr-2025	10:10:07 AM	61	1287.00	CEUX
GENMAB A/S	04-Apr-2025	10:10:07 AM	85	1286.00	CEUX
GENMAB A/S	04-Apr-2025	10:10:50 AM	25	1285.50	TQEX
GENMAB A/S	04-Apr-2025	10:11:10 AM	85	1284.50	XCSE
GENMAB A/S	04-Apr-2025	10:11:10 AM	9	1284.50	CEUX
GENMAB A/S	04-Apr-2025	10:11:10 AM	26	1284.50	CEUX
GENMAB A/S	04-Apr-2025	10:11:21 AM	85	1283.50	XCSE
GENMAB A/S	04-Apr-2025	10:11:54 AM	15	1283.00	TQEX
GENMAB A/S	04-Apr-2025	10:13:20 AM	84	1285.00	XCSE
GENMAB A/S	04-Apr-2025	10:13:20 AM	32	1285.00	CEUX
GENMAB A/S	04-Apr-2025	10:13:23 AM	32	1284.50	TQEX
GENMAB A/S	04-Apr-2025	10:13:27 AM	88	1284.00	XCSE
GENMAB A/S	04-Apr-2025	10:13:27 AM	19	1284.00	CEUX
GENMAB A/S	04-Apr-2025	10:13:27 AM	15	1284.00	CEUX
GENMAB A/S	04-Apr-2025	10:13:40 AM	15	1284.00	CEUX
GENMAB A/S	04-Apr-2025	10:15:54 AM	50	1284.00	XCSE
GENMAB A/S	04-Apr-2025	10:15:54 AM	37	1284.00	XCSE
GENMAB A/S	04-Apr-2025	10:15:54 AM	24	1284.00	TQEX
GENMAB A/S	04-Apr-2025	10:15:54 AM	11	1284.00	CEUX
GENMAB A/S	04-Apr-2025	10:16:00 AM	33	1285.00	XCSE
GENMAB A/S	04-Apr-2025	10:16:08 AM	90	1284.00	XCSE
GENMAB A/S	04-Apr-2025	10:16:08 AM	48	1284.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	10:16:27 AM	90	1284.00	XCSE
GENMAB A/S	04-Apr-2025	10:17:07 AM	31	1284.50	XCSE
GENMAB A/S	04-Apr-2025	10:17:07 AM	56	1284.50	XCSE
GENMAB A/S	04-Apr-2025	10:17:07 AM	44	1284.50	CEUX
GENMAB A/S	04-Apr-2025	10:17:25 AM	10	1285.00	XCSE
GENMAB A/S	04-Apr-2025	10:19:50 AM	11	1292.00	XCSE
GENMAB A/S	04-Apr-2025	10:20:28 AM	21	1294.00	XCSE
GENMAB A/S	04-Apr-2025	10:20:28 AM	26	1294.00	XCSE
GENMAB A/S	04-Apr-2025	10:20:28 AM	82	1293.50	CEUX
GENMAB A/S	04-Apr-2025	10:21:29 AM	86	1294.00	XCSE
GENMAB A/S	04-Apr-2025	10:21:34 AM	63	1293.50	CEUX
GENMAB A/S	04-Apr-2025	10:21:36 AM	90	1293.00	XCSE
GENMAB A/S	04-Apr-2025	10:21:36 AM	17	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:21:36 AM	24	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:21:36 AM	2	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:21:36 AM	37	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:21:36 AM	32	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:21:36 AM	1	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:00 AM	12	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:00 AM	15	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:00 AM	24	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:00 AM	37	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:00 AM	16	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:00 AM	9	1293.50	XCSE
GENMAB A/S	04-Apr-2025	10:22:34 AM	2	1295.00	CEUX
GENMAB A/S	04-Apr-2025	10:22:34 AM	23	1295.00	CEUX
GENMAB A/S	04-Apr-2025	10:22:45 AM	86	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:25:08 AM	30	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:25:08 AM	16	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:25:08 AM	37	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:25:08 AM	4	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:25:09 AM	40	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:26:49 AM	24	1296.50	TQEX
GENMAB A/S	04-Apr-2025	10:27:37 AM	25	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:27:37 AM	12	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:27:37 AM	53	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:27:37 AM	46	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:27:37 AM	40	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:27:37 AM	15	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:29:14 AM	14	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:29:14 AM	16	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:29:17 AM	14	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:29:17 AM	16	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:29:17 AM	15	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:29:17 AM	7	1298.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	10:29:58 AM	6	1297.00	XCSE
GENMAB A/S	04-Apr-2025	10:29:58 AM	26	1297.00	XCSE
GENMAB A/S	04-Apr-2025	10:29:58 AM	56	1297.00	XCSE
GENMAB A/S	04-Apr-2025	10:29:58 AM	24	1297.00	CEUX
GENMAB A/S	04-Apr-2025	10:30:15 AM	86	1298.00	CEUX
GENMAB A/S	04-Apr-2025	10:30:21 AM	31	1298.00	XCSE
GENMAB A/S	04-Apr-2025	10:30:21 AM	29	1297.50	TQEX
GENMAB A/S	04-Apr-2025	10:30:21 AM	12	1297.50	TQEX
GENMAB A/S	04-Apr-2025	10:31:13 AM	10	1297.00	XCSE
GENMAB A/S	04-Apr-2025	10:31:18 AM	36	1297.00	XCSE
GENMAB A/S	04-Apr-2025	10:31:41 AM	42	1297.00	XCSE
GENMAB A/S	04-Apr-2025	10:32:21 AM	33	1299.50	XCSE
GENMAB A/S	04-Apr-2025	10:32:27 AM	35	1299.00	XCSE
GENMAB A/S	04-Apr-2025	10:32:27 AM	54	1299.00	XCSE
GENMAB A/S	04-Apr-2025	10:32:28 AM	34	1298.50	CEUX
GENMAB A/S	04-Apr-2025	10:32:28 AM	53	1298.50	CEUX
GENMAB A/S	04-Apr-2025	10:33:53 AM	75	1299.00	CEUX
GENMAB A/S	04-Apr-2025	10:33:53 AM	13	1299.00	CEUX
GENMAB A/S	04-Apr-2025	10:33:54 AM	10	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:33:54 AM	78	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:33:54 AM	37	1299.00	XCSE
GENMAB A/S	04-Apr-2025	10:33:54 AM	30	1299.00	XCSE
GENMAB A/S	04-Apr-2025	10:33:54 AM	23	1299.00	XCSE
GENMAB A/S	04-Apr-2025	10:33:54 AM	26	1298.50	TQEX
GENMAB A/S	04-Apr-2025	10:34:00 AM	86	1298.50	XCSE
GENMAB A/S	04-Apr-2025	10:34:01 AM	18	1298.00	CEUX
GENMAB A/S	04-Apr-2025	10:34:02 AM	67	1298.00	CEUX
GENMAB A/S	04-Apr-2025	10:34:10 AM	27	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:34:10 AM	62	1297.50	XCSE
GENMAB A/S	04-Apr-2025	10:34:28 AM	44	1297.00	CEUX
GENMAB A/S	04-Apr-2025	10:34:28 AM	18	1297.00	CEUX
GENMAB A/S	04-Apr-2025	10:35:49 AM	20	1296.00	XCSE
GENMAB A/S	04-Apr-2025	10:35:49 AM	25	1296.00	XCSE
GENMAB A/S	04-Apr-2025	10:37:49 AM	39	1296.00	XCSE
GENMAB A/S	04-Apr-2025	10:37:49 AM	90	1295.50	CEUX
GENMAB A/S	04-Apr-2025	10:40:28 AM	2	1294.50	XCSE
GENMAB A/S	04-Apr-2025	10:40:28 AM	78	1294.50	XCSE
GENMAB A/S	04-Apr-2025	10:40:28 AM	4	1294.50	XCSE
GENMAB A/S	04-Apr-2025	10:40:28 AM	89	1294.50	CEUX
GENMAB A/S	04-Apr-2025	10:40:42 AM	10	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:40:47 AM	26	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:40:47 AM	48	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:41:26 AM	89	1294.50	CEUX
GENMAB A/S	04-Apr-2025	10:41:44 AM	10	1294.50	XCSE
GENMAB A/S	04-Apr-2025	10:41:44 AM	13	1294.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	10:42:03 AM	89	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:42:03 AM	70	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:42:03 AM	2	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:42:03 AM	3	1295.00	XCSE
GENMAB A/S	04-Apr-2025	10:42:03 AM	61	1294.50	CEUX
GENMAB A/S	04-Apr-2025	10:42:50 AM	84	1294.00	XCSE
GENMAB A/S	04-Apr-2025	10:42:50 AM	52	1293.00	XCSE
GENMAB A/S	04-Apr-2025	10:42:50 AM	55	1293.50	CEUX
GENMAB A/S	04-Apr-2025	10:45:07 AM	84	1299.00	XCSE
GENMAB A/S	04-Apr-2025	10:45:07 AM	51	1299.00	CEUX
GENMAB A/S	04-Apr-2025	10:45:07 AM	9	1299.00	CEUX
GENMAB A/S	04-Apr-2025	10:46:44 AM	83	1301.00	XCSE
GENMAB A/S	04-Apr-2025	10:46:44 AM	41	1301.00	TQEX
GENMAB A/S	04-Apr-2025	10:46:44 AM	3	1301.50	CEUX
GENMAB A/S	04-Apr-2025	10:46:44 AM	56	1301.50	CEUX
GENMAB A/S	04-Apr-2025	10:46:53 AM	87	1301.50	XCSE
GENMAB A/S	04-Apr-2025	10:47:40 AM	35	1303.50	TQEX
GENMAB A/S	04-Apr-2025	10:47:40 AM	44	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:47:40 AM	7	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:48:59 AM	62	1304.00	XCSE
GENMAB A/S	04-Apr-2025	10:48:59 AM	27	1304.00	XCSE
GENMAB A/S	04-Apr-2025	10:49:06 AM	7	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:49:06 AM	25	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:50:03 AM	86	1303.00	XCSE
GENMAB A/S	04-Apr-2025	10:50:30 AM	90	1305.50	XCSE
GENMAB A/S	04-Apr-2025	10:50:30 AM	60	1305.50	CEUX
GENMAB A/S	04-Apr-2025	10:51:09 AM	86	1304.50	XCSE
GENMAB A/S	04-Apr-2025	10:51:09 AM	55	1304.50	CEUX
GENMAB A/S	04-Apr-2025	10:51:24 AM	73	1303.50	XCSE
GENMAB A/S	04-Apr-2025	10:51:24 AM	14	1303.50	XCSE
GENMAB A/S	04-Apr-2025	10:51:24 AM	13	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:51:24 AM	38	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:51:24 AM	1	1303.50	CEUX
GENMAB A/S	04-Apr-2025	10:51:58 AM	82	1302.50	XCSE
GENMAB A/S	04-Apr-2025	10:52:45 AM	31	1302.00	CEUX
GENMAB A/S	04-Apr-2025	10:53:01 AM	1	1302.00	XCSE
GENMAB A/S	04-Apr-2025	10:53:01 AM	28	1302.00	XCSE
GENMAB A/S	04-Apr-2025	10:53:01 AM	10	1302.00	XCSE
GENMAB A/S	04-Apr-2025	10:53:47 AM	36	1302.00	XCSE
GENMAB A/S	04-Apr-2025	10:54:48 AM	46	1303.50	XCSE
GENMAB A/S	04-Apr-2025	10:54:48 AM	30	1303.50	TQEX
GENMAB A/S	04-Apr-2025	10:55:42 AM	45	1303.50	XCSE
GENMAB A/S	04-Apr-2025	10:55:42 AM	23	1303.50	TQEX
GENMAB A/S	04-Apr-2025	10:56:09 AM	7	1303.00	CEUX
GENMAB A/S	04-Apr-2025	10:56:09 AM	17	1303.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	10:56:14 AM	42	1302.50	XCSE
GENMAB A/S	04-Apr-2025	10:56:14 AM	23	1302.00	CEUX
GENMAB A/S	04-Apr-2025	10:57:09 AM	47	1302.00	XCSE
GENMAB A/S	04-Apr-2025	10:57:09 AM	33	1302.00	CEUX
GENMAB A/S	04-Apr-2025	10:58:39 AM	23	1301.00	XCSE
GENMAB A/S	04-Apr-2025	10:58:39 AM	34	1300.50	TQEX
GENMAB A/S	04-Apr-2025	10:58:39 AM	26	1300.50	CEUX
GENMAB A/S	04-Apr-2025	10:59:02 AM	5	1300.50	CEUX
GENMAB A/S	04-Apr-2025	10:59:02 AM	23	1300.50	CEUX
GENMAB A/S	04-Apr-2025	10:59:03 AM	72	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:00:34 AM	11	1300.50	CEUX
GENMAB A/S	04-Apr-2025	11:01:48 AM	19	1300.50	CEUX
GENMAB A/S	04-Apr-2025	11:01:54 AM	44	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:01:54 AM	26	1299.50	TQEX
GENMAB A/S	04-Apr-2025	11:01:54 AM	32	1299.50	CEUX
GENMAB A/S	04-Apr-2025	11:02:01 AM	1	1300.50	TQEX
GENMAB A/S	04-Apr-2025	11:02:02 AM	24	1300.50	TQEX
GENMAB A/S	04-Apr-2025	11:03:15 AM	23	1301.00	TQEX
GENMAB A/S	04-Apr-2025	11:04:13 AM	37	1301.00	CEUX
GENMAB A/S	04-Apr-2025	11:04:27 AM	7	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:05:19 AM	78	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:05:19 AM	33	1300.50	AQEU
GENMAB A/S	04-Apr-2025	11:05:55 AM	28	1300.00	CEUX
GENMAB A/S	04-Apr-2025	11:05:59 AM	90	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:05:59 AM	27	1299.50	TQEX
GENMAB A/S	04-Apr-2025	11:06:00 AM	34	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:06:00 AM	25	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:06:02 AM	30	1298.00	TQEX
GENMAB A/S	04-Apr-2025	11:06:44 AM	90	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:07:04 AM	34	1297.50	CEUX
GENMAB A/S	04-Apr-2025	11:07:45 AM	27	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:07:45 AM	59	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:08:28 AM	21	1298.50	AQEU
GENMAB A/S	04-Apr-2025	11:08:28 AM	2	1298.50	AQEU
GENMAB A/S	04-Apr-2025	11:08:28 AM	49	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:09:04 AM	20	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:09:09 AM	17	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:09:10 AM	1	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:09:10 AM	84	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:09:27 AM	38	1297.50	CEUX
GENMAB A/S	04-Apr-2025	11:09:35 AM	37	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:09:35 AM	17	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:09:35 AM	29	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:09:35 AM	45	1296.00	XCSE
GENMAB A/S	04-Apr-2025	11:09:35 AM	68	1295.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	11:09:35 AM	36	1296.00	CEUX
GENMAB A/S	04-Apr-2025	11:11:06 AM	23	1296.00	CEUX
GENMAB A/S	04-Apr-2025	11:12:22 AM	20	1294.50	CEUX
GENMAB A/S	04-Apr-2025	11:12:22 AM	6	1294.50	CEUX
GENMAB A/S	04-Apr-2025	11:12:43 AM	2	1295.00	CEUX
GENMAB A/S	04-Apr-2025	11:13:05 AM	21	1295.00	CEUX
GENMAB A/S	04-Apr-2025	11:13:07 AM	10	1294.50	XCSE
GENMAB A/S	04-Apr-2025	11:13:07 AM	21	1294.50	XCSE
GENMAB A/S	04-Apr-2025	11:13:07 AM	11	1294.50	XCSE
GENMAB A/S	04-Apr-2025	11:13:10 AM	24	1294.00	CEUX
GENMAB A/S	04-Apr-2025	11:14:37 AM	17	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:16:08 AM	9	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:16:08 AM	13	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:16:08 AM	67	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:16:36 AM	24	1299.50	TQEX
GENMAB A/S	04-Apr-2025	11:16:36 AM	22	1299.50	CEUX
GENMAB A/S	04-Apr-2025	11:16:36 AM	35	1299.50	CEUX
GENMAB A/S	04-Apr-2025	11:17:15 AM	26	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:17:15 AM	4	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:17:15 AM	55	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:17:16 AM	24	1298.50	AQEU
GENMAB A/S	04-Apr-2025	11:19:43 AM	86	1302.00	XCSE
GENMAB A/S	04-Apr-2025	11:19:43 AM	37	1302.00	XCSE
GENMAB A/S	04-Apr-2025	11:19:43 AM	17	1302.00	XCSE
GENMAB A/S	04-Apr-2025	11:19:43 AM	23	1302.00	TQEX
GENMAB A/S	04-Apr-2025	11:19:43 AM	56	1302.00	CEUX
GENMAB A/S	04-Apr-2025	11:19:43 AM	18	1301.00	CEUX
GENMAB A/S	04-Apr-2025	11:19:44 AM	74	1301.00	XCSE
GENMAB A/S	04-Apr-2025	11:19:44 AM	12	1301.00	XCSE
GENMAB A/S	04-Apr-2025	11:19:44 AM	52	1301.00	CEUX
GENMAB A/S	04-Apr-2025	11:19:45 AM	83	1300.00	XCSE
GENMAB A/S	04-Apr-2025	11:19:45 AM	50	1300.00	CEUX
GENMAB A/S	04-Apr-2025	11:19:45 AM	21	1300.00	CEUX
GENMAB A/S	04-Apr-2025	11:20:04 AM	41	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:20:38 AM	48	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:20:38 AM	35	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:20:38 AM	4	1298.50	AQEU
GENMAB A/S	04-Apr-2025	11:20:39 AM	24	1298.00	CEUX
GENMAB A/S	04-Apr-2025	11:25:13 AM	6	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:25:13 AM	15	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:25:14 AM	14	1301.50	XCSE
GENMAB A/S	04-Apr-2025	11:25:23 AM	24	1302.00	AQEU
GENMAB A/S	04-Apr-2025	11:25:30 AM	26	1302.00	XCSE
GENMAB A/S	04-Apr-2025	11:25:43 AM	9	1301.50	XCSE
GENMAB A/S	04-Apr-2025	11:25:43 AM	65	1301.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	11:25:49 AM	88	1302.50	XCSE
GENMAB A/S	04-Apr-2025	11:25:49 AM	42	1302.50	CEUX
GENMAB A/S	04-Apr-2025	11:25:49 AM	17	1302.50	CEUX
GENMAB A/S	04-Apr-2025	11:26:25 AM	18	1301.50	XCSE
GENMAB A/S	04-Apr-2025	11:26:25 AM	50	1301.50	XCSE
GENMAB A/S	04-Apr-2025	11:26:25 AM	22	1301.50	XCSE
GENMAB A/S	04-Apr-2025	11:26:26 AM	27	1301.50	CEUX
GENMAB A/S	04-Apr-2025	11:26:26 AM	3	1301.50	CEUX
GENMAB A/S	04-Apr-2025	11:26:26 AM	38	1301.50	CEUX
GENMAB A/S	04-Apr-2025	11:26:27 AM	29	1301.00	AQEU
GENMAB A/S	04-Apr-2025	11:26:35 AM	18	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:26:35 AM	48	1300.50	XCSE
GENMAB A/S	04-Apr-2025	11:27:04 AM	86	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:27:04 AM	33	1300.00	CEUX
GENMAB A/S	04-Apr-2025	11:27:04 AM	25	1300.00	CEUX
GENMAB A/S	04-Apr-2025	11:27:04 AM	32	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:27:08 AM	20	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:27:08 AM	3	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:27:21 AM	30	1298.00	TQEX
GENMAB A/S	04-Apr-2025	11:27:59 AM	30	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:27:59 AM	50	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:29:21 AM	64	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:29:21 AM	23	1299.00	TQEX
GENMAB A/S	04-Apr-2025	11:29:24 AM	16	1298.00	CEUX
GENMAB A/S	04-Apr-2025	11:31:18 AM	10	1298.00	CEUX
GENMAB A/S	04-Apr-2025	11:31:33 AM	47	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:31:33 AM	25	1297.00	TQEX
GENMAB A/S	04-Apr-2025	11:31:33 AM	23	1297.00	CEUX
GENMAB A/S	04-Apr-2025	11:31:37 AM	55	1296.50	XCSE
GENMAB A/S	04-Apr-2025	11:33:18 AM	16	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:35:57 AM	20	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:36:09 AM	10	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:36:09 AM	5	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:36:10 AM	14	1300.00	XCSE
GENMAB A/S	04-Apr-2025	11:36:11 AM	36	1300.00	XCSE
GENMAB A/S	04-Apr-2025	11:36:11 AM	34	1300.00	XCSE
GENMAB A/S	04-Apr-2025	11:36:23 AM	63	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:36:23 AM	26	1299.50	TQEX
GENMAB A/S	04-Apr-2025	11:36:23 AM	89	1299.50	CEUX
GENMAB A/S	04-Apr-2025	11:36:32 AM	25	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:37:26 AM	59	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:39:20 AM	16	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:20 AM	19	1298.00	AQEU
GENMAB A/S	04-Apr-2025	11:39:28 AM	1	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:36 AM	3	1298.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	11:39:36 AM	23	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:41 AM	16	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:41 AM	7	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:42 AM	16	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:42 AM	7	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:50 AM	15	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:50 AM	16	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:39:50 AM	5	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:40:03 AM	73	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:40:03 AM	5	1298.00	AQEU
GENMAB A/S	04-Apr-2025	11:40:03 AM	5	1297.50	CEUX
GENMAB A/S	04-Apr-2025	11:40:17 AM	50	1297.50	CEUX
GENMAB A/S	04-Apr-2025	11:40:17 AM	3	1297.50	CEUX
GENMAB A/S	04-Apr-2025	11:41:14 AM	20	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:41:14 AM	1	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:41:59 AM	68	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:42:00 AM	84	1296.50	XCSE
GENMAB A/S	04-Apr-2025	11:42:11 AM	20	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:42:11 AM	14	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:42:11 AM	48	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:42:11 AM	3	1297.00	XCSE
GENMAB A/S	04-Apr-2025	11:44:10 AM	54	1296.50	CEUX
GENMAB A/S	04-Apr-2025	11:44:57 AM	34	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:44:57 AM	2	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:44:57 AM	8	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:44:57 AM	41	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:44:57 AM	3	1295.50	CEUX
GENMAB A/S	04-Apr-2025	11:44:57 AM	28	1295.50	CEUX
GENMAB A/S	04-Apr-2025	11:44:57 AM	21	1295.50	CEUX
GENMAB A/S	04-Apr-2025	11:45:03 AM	16	1295.00	AQEU
GENMAB A/S	04-Apr-2025	11:45:03 AM	3	1295.00	AQEU
GENMAB A/S	04-Apr-2025	11:46:40 AM	73	1294.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:00 AM	8	1295.00	AQEU
GENMAB A/S	04-Apr-2025	11:49:20 AM	16	1294.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	36	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	9	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	1	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	17	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	5	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	32	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:49:59 AM	13	1295.50	XCSE
GENMAB A/S	04-Apr-2025	11:50:25 AM	86	1295.50	CEUX
GENMAB A/S	04-Apr-2025	11:50:59 AM	12	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:50:59 AM	3	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:50:59 AM	10	1298.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	11:50:59 AM	8	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:50:59 AM	37	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:50:59 AM	32	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:50:59 AM	9	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:51:59 AM	15	1299.00	TQEX
GENMAB A/S	04-Apr-2025	11:51:59 AM	23	1299.00	AQEU
GENMAB A/S	04-Apr-2025	11:51:59 AM	36	1299.00	CEUX
GENMAB A/S	04-Apr-2025	11:51:59 AM	25	1299.00	CEUX
GENMAB A/S	04-Apr-2025	11:51:59 AM	1	1299.00	CEUX
GENMAB A/S	04-Apr-2025	11:52:25 AM	19	1299.00	TQEX
GENMAB A/S	04-Apr-2025	11:52:25 AM	27	1299.00	CEUX
GENMAB A/S	04-Apr-2025	11:52:47 AM	84	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:52:52 AM	24	1298.00	AQEU
GENMAB A/S	04-Apr-2025	11:52:52 AM	88	1298.00	CEUX
GENMAB A/S	04-Apr-2025	11:52:58 AM	82	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:52:58 AM	5	1297.50	XCSE
GENMAB A/S	04-Apr-2025	11:55:01 AM	88	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:55:01 AM	31	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:55:43 AM	10	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:55:43 AM	32	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:56:41 AM	5	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:56:41 AM	15	1298.00	XCSE
GENMAB A/S	04-Apr-2025	11:56:56 AM	35	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:56:56 AM	9	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:57:01 AM	50	1298.00	CEUX
GENMAB A/S	04-Apr-2025	11:57:40 AM	19	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:57:40 AM	14	1299.00	XCSE
GENMAB A/S	04-Apr-2025	11:58:29 AM	1	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:58:29 AM	1	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:58:29 AM	12	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:58:29 AM	14	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:58:29 AM	23	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:58:29 AM	4	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:20 AM	24	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:20 AM	3	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:20 AM	20	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:20 AM	37	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:20 AM	15	1299.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:29 AM	89	1298.50	XCSE
GENMAB A/S	04-Apr-2025	11:59:29 AM	28	1298.50	TQEX
GENMAB A/S	04-Apr-2025	11:59:29 AM	24	1298.50	CEUX
GENMAB A/S	04-Apr-2025	11:59:44 AM	1	1298.50	AQEU
GENMAB A/S	04-Apr-2025	12:00:50 PM	19	1299.50	AQEU
GENMAB A/S	04-Apr-2025	12:01:08 PM	6	1299.00	XCSE
GENMAB A/S	04-Apr-2025	12:01:08 PM	25	1299.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	12:01:08 PM	5	1299.50	AQEU
GENMAB A/S	04-Apr-2025	12:01:09 PM	58	1299.00	XCSE
GENMAB A/S	04-Apr-2025	12:02:51 PM	6	1298.00	CEUX
GENMAB A/S	04-Apr-2025	12:03:32 PM	15	1298.50	XCSE
GENMAB A/S	04-Apr-2025	12:03:32 PM	13	1298.50	XCSE
GENMAB A/S	04-Apr-2025	12:03:32 PM	19	1298.50	XCSE
GENMAB A/S	04-Apr-2025	12:03:32 PM	15	1298.50	XCSE
GENMAB A/S	04-Apr-2025	12:03:32 PM	32	1298.50	XCSE
GENMAB A/S	04-Apr-2025	12:03:51 PM	83	1298.50	XCSE
GENMAB A/S	04-Apr-2025	12:04:08 PM	24	1298.00	CEUX
GENMAB A/S	04-Apr-2025	12:04:08 PM	1	1298.00	CEUX
GENMAB A/S	04-Apr-2025	12:05:02 PM	84	1297.50	XCSE
GENMAB A/S	04-Apr-2025	12:05:02 PM	2	1296.50	XCSE
GENMAB A/S	04-Apr-2025	12:05:02 PM	10	1296.50	XCSE
GENMAB A/S	04-Apr-2025	12:05:02 PM	1	1296.50	XCSE
GENMAB A/S	04-Apr-2025	12:05:02 PM	34	1297.00	TQEX
GENMAB A/S	04-Apr-2025	12:05:02 PM	44	1298.00	CEUX
GENMAB A/S	04-Apr-2025	12:05:02 PM	12	1298.00	CEUX
GENMAB A/S	04-Apr-2025	12:05:02 PM	2	1297.00	CEUX
GENMAB A/S	04-Apr-2025	12:05:02 PM	85	1297.00	CEUX
GENMAB A/S	04-Apr-2025	12:05:03 PM	67	1296.50	XCSE
GENMAB A/S	04-Apr-2025	12:05:03 PM	9	1296.50	XCSE
GENMAB A/S	04-Apr-2025	12:05:51 PM	84	1296.00	XCSE
GENMAB A/S	04-Apr-2025	12:05:51 PM	43	1296.50	CEUX
GENMAB A/S	04-Apr-2025	12:05:51 PM	44	1296.50	CEUX
GENMAB A/S	04-Apr-2025	12:06:01 PM	83	1295.50	CEUX
GENMAB A/S	04-Apr-2025	12:06:22 PM	86	1295.00	XCSE
GENMAB A/S	04-Apr-2025	12:06:29 PM	9	1294.00	XCSE
GENMAB A/S	04-Apr-2025	12:06:29 PM	74	1294.00	XCSE
GENMAB A/S	04-Apr-2025	12:06:29 PM	4	1294.00	CEUX
GENMAB A/S	04-Apr-2025	12:06:29 PM	79	1294.00	CEUX
GENMAB A/S	04-Apr-2025	12:06:56 PM	72	1292.50	XCSE
GENMAB A/S	04-Apr-2025	12:06:56 PM	38	1292.50	CEUX
GENMAB A/S	04-Apr-2025	12:07:22 PM	24	1293.00	XCSE
GENMAB A/S	04-Apr-2025	12:07:27 PM	18	1292.50	AQEU
GENMAB A/S	04-Apr-2025	12:07:29 PM	34	1292.50	TQEX
GENMAB A/S	04-Apr-2025	12:07:29 PM	13	1292.50	AQEU
GENMAB A/S	04-Apr-2025	12:08:26 PM	17	1292.50	AQEU
GENMAB A/S	04-Apr-2025	12:08:38 PM	6	1292.50	AQEU
GENMAB A/S	04-Apr-2025	12:08:51 PM	11	1292.50	TQEX
GENMAB A/S	04-Apr-2025	12:08:51 PM	15	1292.50	TQEX
GENMAB A/S	04-Apr-2025	12:09:03 PM	24	1292.00	XCSE
GENMAB A/S	04-Apr-2025	12:09:39 PM	14	1292.50	XCSE
GENMAB A/S	04-Apr-2025	12:09:39 PM	10	1292.50	XCSE
GENMAB A/S	04-Apr-2025	12:10:11 PM	5	1292.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	12:10:11 PM	43	1292.50	XCSE
GENMAB A/S	04-Apr-2025	12:10:41 PM	6	1292.00	XCSE
GENMAB A/S	04-Apr-2025	12:10:58 PM	67	1292.00	XCSE
GENMAB A/S	04-Apr-2025	12:11:03 PM	48	1291.00	XCSE
GENMAB A/S	04-Apr-2025	12:11:03 PM	24	1291.50	AQEU
GENMAB A/S	04-Apr-2025	12:11:03 PM	26	1291.50	CEUX
GENMAB A/S	04-Apr-2025	12:11:57 PM	53	1291.50	XCSE
GENMAB A/S	04-Apr-2025	12:11:57 PM	15	1292.00	TQEX
GENMAB A/S	04-Apr-2025	12:11:57 PM	11	1292.00	TQEX
GENMAB A/S	04-Apr-2025	12:14:17 PM	40	1292.00	XCSE
GENMAB A/S	04-Apr-2025	12:15:15 PM	51	1291.50	CEUX
GENMAB A/S	04-Apr-2025	12:15:32 PM	2	1290.50	XCSE
GENMAB A/S	04-Apr-2025	12:15:32 PM	37	1290.50	XCSE
GENMAB A/S	04-Apr-2025	12:15:32 PM	23	1290.50	CEUX
GENMAB A/S	04-Apr-2025	12:16:19 PM	23	1289.50	XCSE
GENMAB A/S	04-Apr-2025	12:16:19 PM	23	1289.50	CEUX
GENMAB A/S	04-Apr-2025	12:16:30 PM	70	1288.00	XCSE
GENMAB A/S	04-Apr-2025	12:17:29 PM	23	1288.50	AQEU
GENMAB A/S	04-Apr-2025	12:17:32 PM	71	1288.00	CEUX
GENMAB A/S	04-Apr-2025	12:17:46 PM	9	1287.00	XCSE
GENMAB A/S	04-Apr-2025	12:17:46 PM	70	1287.00	XCSE
GENMAB A/S	04-Apr-2025	12:18:03 PM	49	1288.00	CEUX
GENMAB A/S	04-Apr-2025	12:18:09 PM	1	1287.50	XCSE
GENMAB A/S	04-Apr-2025	12:18:09 PM	1	1287.50	XCSE
GENMAB A/S	04-Apr-2025	12:18:09 PM	74	1287.50	XCSE
GENMAB A/S	04-Apr-2025	12:18:09 PM	47	1287.00	CEUX
GENMAB A/S	04-Apr-2025	12:18:22 PM	24	1288.00	CEUX
GENMAB A/S	04-Apr-2025	12:18:50 PM	26	1288.50	XCSE
GENMAB A/S	04-Apr-2025	12:19:03 PM	39	1288.50	XCSE
GENMAB A/S	04-Apr-2025	12:19:20 PM	60	1288.50	XCSE
GENMAB A/S	04-Apr-2025	12:19:41 PM	14	1288.00	CEUX
GENMAB A/S	04-Apr-2025	12:19:41 PM	9	1288.00	CEUX
GENMAB A/S	04-Apr-2025	12:19:43 PM	27	1287.50	XCSE
GENMAB A/S	04-Apr-2025	12:19:43 PM	62	1286.50	XCSE
GENMAB A/S	04-Apr-2025	12:19:43 PM	8	1287.00	CEUX
GENMAB A/S	04-Apr-2025	12:19:43 PM	12	1287.00	CEUX
GENMAB A/S	04-Apr-2025	12:19:43 PM	3	1287.00	CEUX
GENMAB A/S	04-Apr-2025	12:20:04 PM	10	1286.00	CEUX
GENMAB A/S	04-Apr-2025	12:20:09 PM	5	1286.00	CEUX
GENMAB A/S	04-Apr-2025	12:20:09 PM	10	1286.00	CEUX
GENMAB A/S	04-Apr-2025	12:20:14 PM	25	1285.00	TQEX
GENMAB A/S	04-Apr-2025	12:20:25 PM	25	1284.00	XCSE
GENMAB A/S	04-Apr-2025	12:20:25 PM	23	1284.00	TQEX
GENMAB A/S	04-Apr-2025	12:20:49 PM	24	1283.00	XCSE
GENMAB A/S	04-Apr-2025	12:20:59 PM	25	1282.00	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	12:20:59 PM	30	1282.00	CEUX
GENMAB A/S	04-Apr-2025	12:21:07 PM	15	1279.50	TQEX
GENMAB A/S	04-Apr-2025	12:21:13 PM	5	1280.00	XCSE
GENMAB A/S	04-Apr-2025	12:21:25 PM	3	1280.00	XCSE
GENMAB A/S	04-Apr-2025	12:21:25 PM	16	1280.00	XCSE
GENMAB A/S	04-Apr-2025	12:21:42 PM	23	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:21:42 PM	24	1279.50	CEUX
GENMAB A/S	04-Apr-2025	12:22:00 PM	24	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:22:22 PM	23	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:22:54 PM	27	1277.00	XCSE
GENMAB A/S	04-Apr-2025	12:22:54 PM	30	1277.00	TQEX
GENMAB A/S	04-Apr-2025	12:22:54 PM	24	1277.00	CEUX
GENMAB A/S	04-Apr-2025	12:23:49 PM	30	1276.00	XCSE
GENMAB A/S	04-Apr-2025	12:23:54 PM	23	1276.50	XCSE
GENMAB A/S	04-Apr-2025	12:24:31 PM	25	1277.50	XCSE
GENMAB A/S	04-Apr-2025	12:24:31 PM	15	1277.50	AQEU
GENMAB A/S	04-Apr-2025	12:24:39 PM	2	1277.50	AQEU
GENMAB A/S	04-Apr-2025	12:24:39 PM	6	1277.50	AQEU
GENMAB A/S	04-Apr-2025	12:24:39 PM	29	1277.00	CEUX
GENMAB A/S	04-Apr-2025	12:25:33 PM	29	1279.50	XCSE
GENMAB A/S	04-Apr-2025	12:25:33 PM	24	1279.50	CEUX
GENMAB A/S	04-Apr-2025	12:26:26 PM	6	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:26:26 PM	18	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:26:26 PM	26	1281.50	TQEX
GENMAB A/S	04-Apr-2025	12:26:26 PM	26	1281.50	CEUX
GENMAB A/S	04-Apr-2025	12:26:47 PM	29	1280.50	XCSE
GENMAB A/S	04-Apr-2025	12:27:44 PM	36	1282.50	XCSE
GENMAB A/S	04-Apr-2025	12:28:31 PM	30	1283.50	XCSE
GENMAB A/S	04-Apr-2025	12:28:31 PM	14	1283.50	CEUX
GENMAB A/S	04-Apr-2025	12:28:31 PM	13	1283.50	CEUX
GENMAB A/S	04-Apr-2025	12:29:08 PM	23	1283.00	CEUX
GENMAB A/S	04-Apr-2025	12:29:16 PM	30	1282.50	XCSE
GENMAB A/S	04-Apr-2025	12:29:31 PM	32	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:29:31 PM	27	1282.00	CEUX
GENMAB A/S	04-Apr-2025	12:29:37 PM	28	1280.50	XCSE
GENMAB A/S	04-Apr-2025	12:29:56 PM	25	1281.00	XCSE
GENMAB A/S	04-Apr-2025	12:30:25 PM	26	1281.00	XCSE
GENMAB A/S	04-Apr-2025	12:30:25 PM	23	1281.00	CEUX
GENMAB A/S	04-Apr-2025	12:33:10 PM	31	1284.50	XCSE
GENMAB A/S	04-Apr-2025	12:33:10 PM	32	1284.50	TQEX
GENMAB A/S	04-Apr-2025	12:33:10 PM	26	1284.50	CEUX
GENMAB A/S	04-Apr-2025	12:33:33 PM	19	1284.00	AQEU
GENMAB A/S	04-Apr-2025	12:33:33 PM	6	1284.00	AQEU
GENMAB A/S	04-Apr-2025	12:33:34 PM	17	1283.50	XCSE
GENMAB A/S	04-Apr-2025	12:33:34 PM	14	1283.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	12:33:34 PM	34	1283.50	TQEX
GENMAB A/S	04-Apr-2025	12:33:34 PM	24	1283.50	CEUX
GENMAB A/S	04-Apr-2025	12:34:29 PM	24	1282.50	XCSE
GENMAB A/S	04-Apr-2025	12:35:47 PM	24	1282.00	CEUX
GENMAB A/S	04-Apr-2025	12:35:51 PM	18	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:35:51 PM	25	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:36:35 PM	57	1280.50	XCSE
GENMAB A/S	04-Apr-2025	12:36:35 PM	24	1280.50	CEUX
GENMAB A/S	04-Apr-2025	12:37:08 PM	40	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:37:40 PM	12	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:37:55 PM	40	1279.50	XCSE
GENMAB A/S	04-Apr-2025	12:37:55 PM	27	1279.50	XCSE
GENMAB A/S	04-Apr-2025	12:38:25 PM	35	1279.50	XCSE
GENMAB A/S	04-Apr-2025	12:40:14 PM	58	1283.50	XCSE
GENMAB A/S	04-Apr-2025	12:40:14 PM	24	1283.50	TQEX
GENMAB A/S	04-Apr-2025	12:40:41 PM	2	1284.50	XCSE
GENMAB A/S	04-Apr-2025	12:41:16 PM	23	1286.00	TQEX
GENMAB A/S	04-Apr-2025	12:41:16 PM	61	1286.00	CEUX
GENMAB A/S	04-Apr-2025	12:41:21 PM	15	1285.50	XCSE
GENMAB A/S	04-Apr-2025	12:41:21 PM	47	1285.50	XCSE
GENMAB A/S	04-Apr-2025	12:41:45 PM	40	1284.50	XCSE
GENMAB A/S	04-Apr-2025	12:41:59 PM	28	1285.00	TQEX
GENMAB A/S	04-Apr-2025	12:41:59 PM	21	1285.00	CEUX
GENMAB A/S	04-Apr-2025	12:42:05 PM	10	1285.00	CEUX
GENMAB A/S	04-Apr-2025	12:42:42 PM	14	1285.00	CEUX
GENMAB A/S	04-Apr-2025	12:42:42 PM	13	1285.00	CEUX
GENMAB A/S	04-Apr-2025	12:43:27 PM	1	1284.50	XCSE
GENMAB A/S	04-Apr-2025	12:43:27 PM	10	1284.50	XCSE
GENMAB A/S	04-Apr-2025	12:44:50 PM	43	1283.50	XCSE
GENMAB A/S	04-Apr-2025	12:44:50 PM	1	1284.00	CEUX
GENMAB A/S	04-Apr-2025	12:44:50 PM	1	1284.00	CEUX
GENMAB A/S	04-Apr-2025	12:44:50 PM	60	1284.00	CEUX
GENMAB A/S	04-Apr-2025	12:45:07 PM	26	1283.50	TQEX
GENMAB A/S	04-Apr-2025	12:45:10 PM	13	1283.00	CEUX
GENMAB A/S	04-Apr-2025	12:45:10 PM	20	1283.00	CEUX
GENMAB A/S	04-Apr-2025	12:45:27 PM	16	1282.50	XCSE
GENMAB A/S	04-Apr-2025	12:45:27 PM	27	1282.50	XCSE
GENMAB A/S	04-Apr-2025	12:45:52 PM	23	1282.00	CEUX
GENMAB A/S	04-Apr-2025	12:47:04 PM	1	1282.00	CEUX
GENMAB A/S	04-Apr-2025	12:47:35 PM	21	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:47:35 PM	23	1282.00	CEUX
GENMAB A/S	04-Apr-2025	12:47:41 PM	39	1281.50	XCSE
GENMAB A/S	04-Apr-2025	12:48:00 PM	72	1280.50	XCSE
GENMAB A/S	04-Apr-2025	12:48:12 PM	11	1280.50	CEUX
GENMAB A/S	04-Apr-2025	12:48:12 PM	18	1280.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	12:49:46 PM	39	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:49:46 PM	21	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:49:46 PM	29	1279.00	CEUX
GENMAB A/S	04-Apr-2025	12:51:36 PM	89	1279.50	XCSE
GENMAB A/S	04-Apr-2025	12:51:51 PM	6	1279.50	TQEX
GENMAB A/S	04-Apr-2025	12:51:51 PM	37	1279.50	CEUX
GENMAB A/S	04-Apr-2025	12:52:10 PM	16	1278.50	XCSE
GENMAB A/S	04-Apr-2025	12:52:31 PM	71	1279.50	XCSE
GENMAB A/S	04-Apr-2025	12:52:57 PM	55	1278.50	XCSE
GENMAB A/S	04-Apr-2025	12:52:58 PM	23	1278.50	CEUX
GENMAB A/S	04-Apr-2025	12:53:22 PM	63	1277.50	XCSE
GENMAB A/S	04-Apr-2025	12:53:22 PM	31	1277.50	CEUX
GENMAB A/S	04-Apr-2025	12:55:07 PM	38	1278.50	XCSE
GENMAB A/S	04-Apr-2025	12:55:07 PM	26	1278.50	TQEX
GENMAB A/S	04-Apr-2025	12:55:07 PM	24	1278.50	CEUX
GENMAB A/S	04-Apr-2025	12:55:21 PM	28	1277.50	XCSE
GENMAB A/S	04-Apr-2025	12:55:21 PM	24	1277.50	CEUX
GENMAB A/S	04-Apr-2025	12:55:21 PM	13	1278.00	AQEU
GENMAB A/S	04-Apr-2025	12:55:21 PM	15	1278.00	AQEU
GENMAB A/S	04-Apr-2025	12:55:31 PM	23	1276.50	CEUX
GENMAB A/S	04-Apr-2025	12:55:38 PM	25	1277.50	CEUX
GENMAB A/S	04-Apr-2025	12:56:55 PM	34	1279.00	AQEU
GENMAB A/S	04-Apr-2025	12:57:15 PM	32	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:57:15 PM	30	1279.00	XCSE
GENMAB A/S	04-Apr-2025	12:57:46 PM	38	1278.00	XCSE
GENMAB A/S	04-Apr-2025	12:57:46 PM	23	1278.00	CEUX
GENMAB A/S	04-Apr-2025	12:58:33 PM	7	1278.00	XCSE
GENMAB A/S	04-Apr-2025	12:58:43 PM	45	1278.00	XCSE
GENMAB A/S	04-Apr-2025	12:58:43 PM	23	1278.00	CEUX
GENMAB A/S	04-Apr-2025	13:00:28 PM	16	1279.50	XCSE
GENMAB A/S	04-Apr-2025	13:00:28 PM	25	1279.50	XCSE
GENMAB A/S	04-Apr-2025	13:00:37 PM	16	1279.50	XCSE
GENMAB A/S	04-Apr-2025	13:01:08 PM	24	1279.00	CEUX
GENMAB A/S	04-Apr-2025	13:01:09 PM	30	1279.00	TQEX
GENMAB A/S	04-Apr-2025	13:01:14 PM	49	1278.50	XCSE
GENMAB A/S	04-Apr-2025	13:01:15 PM	21	1278.00	CEUX
GENMAB A/S	04-Apr-2025	13:01:15 PM	4	1278.00	CEUX
GENMAB A/S	04-Apr-2025	13:01:42 PM	36	1277.00	XCSE
GENMAB A/S	04-Apr-2025	13:01:42 PM	23	1277.00	CEUX
GENMAB A/S	04-Apr-2025	13:01:45 PM	40	1276.00	XCSE
GENMAB A/S	04-Apr-2025	13:04:05 PM	8	1277.50	XCSE
GENMAB A/S	04-Apr-2025	13:04:05 PM	45	1277.50	XCSE
GENMAB A/S	04-Apr-2025	13:04:05 PM	26	1277.50	CEUX
GENMAB A/S	04-Apr-2025	13:04:05 PM	23	1277.50	AQEU
GENMAB A/S	04-Apr-2025	13:04:54 PM	5	1277.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	13:06:05 PM	21	1278.00	XCSE
GENMAB A/S	04-Apr-2025	13:06:05 PM	31	1278.00	XCSE
GENMAB A/S	04-Apr-2025	13:06:06 PM	26	1277.50	CEUX
GENMAB A/S	04-Apr-2025	13:06:07 PM	45	1277.00	XCSE
GENMAB A/S	04-Apr-2025	13:06:07 PM	23	1277.00	TQEX
GENMAB A/S	04-Apr-2025	13:06:07 PM	23	1276.50	CEUX
GENMAB A/S	04-Apr-2025	13:06:19 PM	2	1276.00	XCSE
GENMAB A/S	04-Apr-2025	13:06:19 PM	16	1276.00	XCSE
GENMAB A/S	04-Apr-2025	13:06:19 PM	23	1276.00	XCSE
GENMAB A/S	04-Apr-2025	13:06:32 PM	23	1275.50	CEUX
GENMAB A/S	04-Apr-2025	13:06:40 PM	5	1274.50	XCSE
GENMAB A/S	04-Apr-2025	13:06:43 PM	3	1274.50	XCSE
GENMAB A/S	04-Apr-2025	13:06:43 PM	34	1274.50	XCSE
GENMAB A/S	04-Apr-2025	13:08:40 PM	25	1274.50	CEUX
GENMAB A/S	04-Apr-2025	13:08:41 PM	34	1274.00	XCSE
GENMAB A/S	04-Apr-2025	13:08:41 PM	8	1274.00	XCSE
GENMAB A/S	04-Apr-2025	13:08:41 PM	7	1273.50	CEUX
GENMAB A/S	04-Apr-2025	13:08:49 PM	25	1273.00	XCSE
GENMAB A/S	04-Apr-2025	13:09:06 PM	30	1272.00	XCSE
GENMAB A/S	04-Apr-2025	13:09:37 PM	12	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:09:45 PM	9	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:09:56 PM	5	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:09:57 PM	5	1270.50	CEUX
GENMAB A/S	04-Apr-2025	13:09:57 PM	25	1270.50	CEUX
GENMAB A/S	04-Apr-2025	13:10:40 PM	9	1270.50	TQEX
GENMAB A/S	04-Apr-2025	13:10:40 PM	14	1270.50	TQEX
GENMAB A/S	04-Apr-2025	13:12:08 PM	30	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:13:03 PM	1	1270.50	CEUX
GENMAB A/S	04-Apr-2025	13:13:03 PM	1	1270.50	CEUX
GENMAB A/S	04-Apr-2025	13:14:05 PM	43	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:14:25 PM	21	1270.50	CEUX
GENMAB A/S	04-Apr-2025	13:14:53 PM	5	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:15:14 PM	58	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:15:14 PM	23	1270.00	XCSE
GENMAB A/S	04-Apr-2025	13:15:14 PM	1	1270.00	XCSE
GENMAB A/S	04-Apr-2025	13:15:14 PM	20	1271.00	CEUX
GENMAB A/S	04-Apr-2025	13:15:14 PM	19	1271.00	CEUX
GENMAB A/S	04-Apr-2025	13:15:14 PM	31	1269.50	CEUX
GENMAB A/S	04-Apr-2025	13:15:14 PM	23	1269.00	AQEU
GENMAB A/S	04-Apr-2025	13:15:59 PM	11	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:16:11 PM	32	1271.50	CEUX
GENMAB A/S	04-Apr-2025	13:16:47 PM	3	1272.00	XCSE
GENMAB A/S	04-Apr-2025	13:16:47 PM	44	1272.00	XCSE
GENMAB A/S	04-Apr-2025	13:17:10 PM	7	1271.50	TQEX
GENMAB A/S	04-Apr-2025	13:17:10 PM	18	1271.50	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	13:19:06 PM	29	1271.00	XCSE
GENMAB A/S	04-Apr-2025	13:19:14 PM	29	1270.50	CEUX
GENMAB A/S	04-Apr-2025	13:20:30 PM	28	1270.00	XCSE
GENMAB A/S	04-Apr-2025	13:20:38 PM	24	1269.50	CEUX
GENMAB A/S	04-Apr-2025	13:20:41 PM	18	1269.00	XCSE
GENMAB A/S	04-Apr-2025	13:21:03 PM	8	1269.00	XCSE
GENMAB A/S	04-Apr-2025	13:21:03 PM	15	1269.00	AQEU
GENMAB A/S	04-Apr-2025	13:21:03 PM	11	1269.00	AQEU
GENMAB A/S	04-Apr-2025	13:21:40 PM	24	1268.00	CEUX
GENMAB A/S	04-Apr-2025	13:21:44 PM	63	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:21:46 PM	24	1267.00	CEUX
GENMAB A/S	04-Apr-2025	13:21:51 PM	21	1266.50	AQEU
GENMAB A/S	04-Apr-2025	13:22:03 PM	2	1266.50	AQEU
GENMAB A/S	04-Apr-2025	13:22:46 PM	67	1269.50	XCSE
GENMAB A/S	04-Apr-2025	13:22:46 PM	26	1269.00	TQEX
GENMAB A/S	04-Apr-2025	13:23:37 PM	1	1270.00	XCSE
GENMAB A/S	04-Apr-2025	13:23:37 PM	15	1270.00	XCSE
GENMAB A/S	04-Apr-2025	13:23:37 PM	31	1270.00	XCSE
GENMAB A/S	04-Apr-2025	13:23:46 PM	23	1269.50	CEUX
GENMAB A/S	04-Apr-2025	13:24:29 PM	2	1269.50	XCSE
GENMAB A/S	04-Apr-2025	13:24:29 PM	3	1269.50	XCSE
GENMAB A/S	04-Apr-2025	13:24:29 PM	19	1269.50	XCSE
GENMAB A/S	04-Apr-2025	13:24:35 PM	55	1268.50	XCSE
GENMAB A/S	04-Apr-2025	13:24:35 PM	28	1268.50	CEUX
GENMAB A/S	04-Apr-2025	13:24:58 PM	25	1268.00	CEUX
GENMAB A/S	04-Apr-2025	13:25:08 PM	2	1267.00	XCSE
GENMAB A/S	04-Apr-2025	13:25:08 PM	48	1267.00	XCSE
GENMAB A/S	04-Apr-2025	13:26:31 PM	23	1266.00	CEUX
GENMAB A/S	04-Apr-2025	13:27:50 PM	23	1266.00	CEUX
GENMAB A/S	04-Apr-2025	13:28:15 PM	24	1266.00	CEUX
GENMAB A/S	04-Apr-2025	13:28:25 PM	26	1265.50	XCSE
GENMAB A/S	04-Apr-2025	13:28:30 PM	20	1264.50	TQEX
GENMAB A/S	04-Apr-2025	13:28:45 PM	29	1264.50	XCSE
GENMAB A/S	04-Apr-2025	13:30:13 PM	24	1263.00	XCSE
GENMAB A/S	04-Apr-2025	13:30:13 PM	26	1263.00	CEUX
GENMAB A/S	04-Apr-2025	13:30:48 PM	11	1261.50	XCSE
GENMAB A/S	04-Apr-2025	13:30:48 PM	27	1261.50	AQEU
GENMAB A/S	04-Apr-2025	13:31:15 PM	74	1262.50	XCSE
GENMAB A/S	04-Apr-2025	13:32:01 PM	30	1261.50	XCSE
GENMAB A/S	04-Apr-2025	13:32:01 PM	1	1261.50	XCSE
GENMAB A/S	04-Apr-2025	13:32:54 PM	29	1261.50	CEUX
GENMAB A/S	04-Apr-2025	13:33:12 PM	9	1261.50	XCSE
GENMAB A/S	04-Apr-2025	13:34:20 PM	7	1263.00	TQEX
GENMAB A/S	04-Apr-2025	13:36:10 PM	87	1266.50	XCSE
GENMAB A/S	04-Apr-2025	13:36:10 PM	36	1266.50	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	13:37:28 PM	85	1267.00	XCSE
GENMAB A/S	04-Apr-2025	13:37:29 PM	24	1266.50	CEUX
GENMAB A/S	04-Apr-2025	13:38:19 PM	33	1267.50	CEUX
GENMAB A/S	04-Apr-2025	13:39:06 PM	46	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:39:28 PM	9	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:40:02 PM	13	1268.50	XCSE
GENMAB A/S	04-Apr-2025	13:40:02 PM	68	1268.50	XCSE
GENMAB A/S	04-Apr-2025	13:41:09 PM	3	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:41:09 PM	25	1268.00	TQEX
GENMAB A/S	04-Apr-2025	13:41:09 PM	38	1268.00	CEUX
GENMAB A/S	04-Apr-2025	13:42:42 PM	22	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:42:42 PM	27	1266.50	XCSE
GENMAB A/S	04-Apr-2025	13:42:42 PM	36	1267.50	CEUX
GENMAB A/S	04-Apr-2025	13:42:42 PM	23	1266.50	CEUX
GENMAB A/S	04-Apr-2025	13:42:42 PM	24	1267.00	AQEU
GENMAB A/S	04-Apr-2025	13:43:10 PM	28	1266.50	CEUX
GENMAB A/S	04-Apr-2025	13:44:00 PM	21	1265.00	XCSE
GENMAB A/S	04-Apr-2025	13:44:00 PM	8	1265.00	CEUX
GENMAB A/S	04-Apr-2025	13:44:00 PM	25	1265.00	CEUX
GENMAB A/S	04-Apr-2025	13:44:32 PM	36	1265.00	XCSE
GENMAB A/S	04-Apr-2025	13:44:32 PM	3	1265.00	CEUX
GENMAB A/S	04-Apr-2025	13:44:33 PM	30	1264.00	CEUX
GENMAB A/S	04-Apr-2025	13:45:11 PM	5	1264.00	TQEX
GENMAB A/S	04-Apr-2025	13:45:11 PM	1	1264.00	TQEX
GENMAB A/S	04-Apr-2025	13:46:18 PM	13	1265.00	XCSE
GENMAB A/S	04-Apr-2025	13:46:25 PM	41	1265.00	XCSE
GENMAB A/S	04-Apr-2025	13:46:25 PM	32	1265.00	XCSE
GENMAB A/S	04-Apr-2025	13:46:58 PM	28	1264.00	TQEX
GENMAB A/S	04-Apr-2025	13:46:58 PM	3	1264.00	CEUX
GENMAB A/S	04-Apr-2025	13:47:11 PM	7	1263.50	XCSE
GENMAB A/S	04-Apr-2025	13:49:48 PM	23	1265.00	TQEX
GENMAB A/S	04-Apr-2025	13:50:09 PM	84	1264.50	XCSE
GENMAB A/S	04-Apr-2025	13:50:09 PM	18	1263.50	XCSE
GENMAB A/S	04-Apr-2025	13:50:09 PM	59	1263.50	XCSE
GENMAB A/S	04-Apr-2025	13:50:09 PM	29	1263.50	CEUX
GENMAB A/S	04-Apr-2025	13:52:56 PM	30	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:52:56 PM	38	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:52:56 PM	33	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:53:06 PM	78	1266.50	CEUX
GENMAB A/S	04-Apr-2025	13:54:03 PM	83	1266.00	XCSE
GENMAB A/S	04-Apr-2025	13:54:03 PM	23	1266.00	TQEX
GENMAB A/S	04-Apr-2025	13:54:03 PM	52	1265.50	CEUX
GENMAB A/S	04-Apr-2025	13:54:33 PM	86	1266.00	XCSE
GENMAB A/S	04-Apr-2025	13:54:33 PM	36	1266.00	CEUX
GENMAB A/S	04-Apr-2025	13:54:33 PM	25	1266.00	AQEU

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	13:55:07 PM	43	1266.50	XCSE
GENMAB A/S	04-Apr-2025	13:56:25 PM	87	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:56:25 PM	23	1268.00	TQEX
GENMAB A/S	04-Apr-2025	13:56:25 PM	57	1267.00	CEUX
GENMAB A/S	04-Apr-2025	13:56:43 PM	42	1266.50	XCSE
GENMAB A/S	04-Apr-2025	13:58:06 PM	4	1268.50	XCSE
GENMAB A/S	04-Apr-2025	13:58:54 PM	69	1269.00	CEUX
GENMAB A/S	04-Apr-2025	13:58:57 PM	79	1268.50	XCSE
GENMAB A/S	04-Apr-2025	13:59:18 PM	88	1268.50	XCSE
GENMAB A/S	04-Apr-2025	13:59:20 PM	84	1267.50	XCSE
GENMAB A/S	04-Apr-2025	13:59:20 PM	57	1268.00	CEUX
GENMAB A/S	04-Apr-2025	13:59:25 PM	58	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:00:20 PM	89	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:01:34 PM	85	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:01:41 PM	27	1269.00	TQEX
GENMAB A/S	04-Apr-2025	14:01:43 PM	85	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:01:43 PM	32	1268.50	CEUX
GENMAB A/S	04-Apr-2025	14:01:49 PM	55	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:01:51 PM	29	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:01:55 PM	47	1266.50	XCSE
GENMAB A/S	04-Apr-2025	14:02:44 PM	35	1265.50	XCSE
GENMAB A/S	04-Apr-2025	14:02:44 PM	23	1265.50	CEUX
GENMAB A/S	04-Apr-2025	14:07:33 PM	27	1268.00	TQEX
GENMAB A/S	04-Apr-2025	14:07:40 PM	20	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:07:45 PM	61	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:07:55 PM	2	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:07:55 PM	61	1267.50	CEUX
GENMAB A/S	04-Apr-2025	14:08:15 PM	25	1267.00	TQEX
GENMAB A/S	04-Apr-2025	14:08:41 PM	3	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:08:41 PM	62	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:09:19 PM	84	1266.50	XCSE
GENMAB A/S	04-Apr-2025	14:09:19 PM	23	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:10:29 PM	84	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:11:16 PM	90	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:11:36 PM	85	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:13:05 PM	23	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:13:05 PM	35	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:14:39 PM	86	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:14:39 PM	44	1266.00	CEUX
GENMAB A/S	04-Apr-2025	14:14:40 PM	30	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:15:10 PM	16	1266.50	XCSE
GENMAB A/S	04-Apr-2025	14:15:10 PM	16	1266.50	XCSE
GENMAB A/S	04-Apr-2025	14:15:38 PM	87	1267.50	CEUX
GENMAB A/S	04-Apr-2025	14:15:54 PM	89	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:15:54 PM	23	1267.00	TQEX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	14:15:54 PM	29	1267.00	AQEU
GENMAB A/S	04-Apr-2025	14:16:00 PM	8	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:16:47 PM	24	1268.00	TQEX
GENMAB A/S	04-Apr-2025	14:16:47 PM	88	1268.00	CEUX
GENMAB A/S	04-Apr-2025	14:18:22 PM	41	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:18:22 PM	14	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:18:59 PM	46	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:18:59 PM	38	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:18:59 PM	14	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:18:59 PM	15	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:04 PM	13	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:04 PM	12	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:09 PM	9	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:22 PM	23	1269.00	TQEX
GENMAB A/S	04-Apr-2025	14:19:52 PM	35	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	12	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	13	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	15	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	30	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	8	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	14	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	38	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:19:52 PM	15	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:20:10 PM	13	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:20:10 PM	38	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:20:10 PM	16	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:20:10 PM	16	1269.50	XCSE
GENMAB A/S	04-Apr-2025	14:20:28 PM	87	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:20:28 PM	74	1268.50	CEUX
GENMAB A/S	04-Apr-2025	14:21:42 PM	23	1268.00	TQEX
GENMAB A/S	04-Apr-2025	14:21:42 PM	90	1268.00	CEUX
GENMAB A/S	04-Apr-2025	14:21:43 PM	9	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:21:58 PM	88	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:22:00 PM	86	1267.00	CEUX
GENMAB A/S	04-Apr-2025	14:23:00 PM	63	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:23:49 PM	23	1266.50	TQEX
GENMAB A/S	04-Apr-2025	14:24:10 PM	10	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:24:10 PM	11	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:24:10 PM	46	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:24:10 PM	88	1266.00	CEUX
GENMAB A/S	04-Apr-2025	14:24:11 PM	15	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:24:11 PM	8	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:24:11 PM	15	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:24:14 PM	23	1265.50	TQEX
GENMAB A/S	04-Apr-2025	14:24:40 PM	45	1265.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	14:24:40 PM	30	1265.50	XCSE
GENMAB A/S	04-Apr-2025	14:24:40 PM	38	1265.50	XCSE
GENMAB A/S	04-Apr-2025	14:25:48 PM	16	1265.50	XCSE
GENMAB A/S	04-Apr-2025	14:25:48 PM	13	1265.50	XCSE
GENMAB A/S	04-Apr-2025	14:26:15 PM	23	1266.50	TQEX
GENMAB A/S	04-Apr-2025	14:27:00 PM	89	1265.50	XCSE
GENMAB A/S	04-Apr-2025	14:28:50 PM	58	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:29:29 PM	8	1266.50	CEUX
GENMAB A/S	04-Apr-2025	14:29:35 PM	24	1266.50	TQEX
GENMAB A/S	04-Apr-2025	14:29:35 PM	82	1266.50	CEUX
GENMAB A/S	04-Apr-2025	14:30:02 PM	8	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:30:02 PM	8	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:31:06 PM	84	1268.00	XCSE
GENMAB A/S	04-Apr-2025	14:31:06 PM	85	1268.00	CEUX
GENMAB A/S	04-Apr-2025	14:31:10 PM	14	1268.00	XCSE
GENMAB A/S	04-Apr-2025	14:31:16 PM	89	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:32:29 PM	38	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:32:29 PM	16	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:32:29 PM	14	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:32:29 PM	53	1268.00	CEUX
GENMAB A/S	04-Apr-2025	14:32:29 PM	37	1268.00	CEUX
GENMAB A/S	04-Apr-2025	14:32:39 PM	1	1268.00	XCSE
GENMAB A/S	04-Apr-2025	14:32:39 PM	89	1268.00	XCSE
GENMAB A/S	04-Apr-2025	14:32:39 PM	88	1268.00	CEUX
GENMAB A/S	04-Apr-2025	14:32:43 PM	23	1267.50	TQEX
GENMAB A/S	04-Apr-2025	14:32:44 PM	27	1267.50	AQEU
GENMAB A/S	04-Apr-2025	14:33:01 PM	86	1267.00	XCSE
GENMAB A/S	04-Apr-2025	14:34:01 PM	5	1266.50	CEUX
GENMAB A/S	04-Apr-2025	14:34:01 PM	38	1266.50	CEUX
GENMAB A/S	04-Apr-2025	14:35:36 PM	85	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:35:36 PM	46	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:35:36 PM	76	1268.50	CEUX
GENMAB A/S	04-Apr-2025	14:36:06 PM	85	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:36:06 PM	84	1267.50	CEUX
GENMAB A/S	04-Apr-2025	14:36:07 PM	25	1267.00	TQEX
GENMAB A/S	04-Apr-2025	14:36:40 PM	43	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:36:40 PM	34	1267.50	XCSE
GENMAB A/S	04-Apr-2025	14:36:42 PM	41	1266.50	CEUX
GENMAB A/S	04-Apr-2025	14:37:04 PM	31	1266.00	XCSE
GENMAB A/S	04-Apr-2025	14:37:04 PM	53	1265.50	CEUX
GENMAB A/S	04-Apr-2025	14:37:06 PM	86	1265.00	XCSE
GENMAB A/S	04-Apr-2025	14:37:33 PM	28	1264.50	XCSE
GENMAB A/S	04-Apr-2025	14:37:33 PM	55	1264.50	XCSE
GENMAB A/S	04-Apr-2025	14:37:58 PM	48	1264.00	CEUX
GENMAB A/S	04-Apr-2025	14:38:30 PM	83	1263.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	14:38:45 PM	28	1263.00	CEUX
GENMAB A/S	04-Apr-2025	14:39:05 PM	30	1262.00	XCSE
GENMAB A/S	04-Apr-2025	14:39:05 PM	58	1262.00	XCSE
GENMAB A/S	04-Apr-2025	14:39:05 PM	25	1262.00	CEUX
GENMAB A/S	04-Apr-2025	14:40:04 PM	23	1264.50	CEUX
GENMAB A/S	04-Apr-2025	14:41:11 PM	83	1265.00	XCSE
GENMAB A/S	04-Apr-2025	14:42:18 PM	16	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:42:18 PM	69	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:42:40 PM	80	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:42:40 PM	23	1271.50	TQEX
GENMAB A/S	04-Apr-2025	14:42:40 PM	39	1272.00	CEUX
GENMAB A/S	04-Apr-2025	14:42:40 PM	23	1272.50	AQEU
GENMAB A/S	04-Apr-2025	14:43:10 PM	90	1271.00	XCSE
GENMAB A/S	04-Apr-2025	14:43:10 PM	42	1271.00	CEUX
GENMAB A/S	04-Apr-2025	14:44:50 PM	18	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:45:02 PM	72	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:45:02 PM	39	1270.00	CEUX
GENMAB A/S	04-Apr-2025	14:45:03 PM	31	1268.50	XCSE
GENMAB A/S	04-Apr-2025	14:45:03 PM	28	1269.00	CEUX
GENMAB A/S	04-Apr-2025	14:48:26 PM	86	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:48:26 PM	23	1272.50	TQEX
GENMAB A/S	04-Apr-2025	14:48:26 PM	45	1272.00	CEUX
GENMAB A/S	04-Apr-2025	14:48:26 PM	24	1271.50	AQEU
GENMAB A/S	04-Apr-2025	14:48:44 PM	80	1270.50	XCSE
GENMAB A/S	04-Apr-2025	14:48:44 PM	10	1270.50	XCSE
GENMAB A/S	04-Apr-2025	14:48:44 PM	3	1270.50	CEUX
GENMAB A/S	04-Apr-2025	14:48:44 PM	40	1270.50	CEUX
GENMAB A/S	04-Apr-2025	14:49:39 PM	9	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:49:54 PM	9	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:50:03 PM	18	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:50:18 PM	51	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:50:18 PM	24	1270.00	AQEU
GENMAB A/S	04-Apr-2025	14:52:30 PM	23	1270.00	TQEX
GENMAB A/S	04-Apr-2025	14:54:12 PM	3	1270.50	XCSE
GENMAB A/S	04-Apr-2025	14:54:12 PM	5	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:54:18 PM	1	1271.00	XCSE
GENMAB A/S	04-Apr-2025	14:54:18 PM	43	1271.00	XCSE
GENMAB A/S	04-Apr-2025	14:54:18 PM	38	1271.00	XCSE
GENMAB A/S	04-Apr-2025	14:55:12 PM	10	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:55:58 PM	69	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:55:58 PM	23	1270.00	TQEX
GENMAB A/S	04-Apr-2025	14:55:58 PM	3	1270.00	CEUX
GENMAB A/S	04-Apr-2025	14:55:58 PM	67	1270.00	CEUX
GENMAB A/S	04-Apr-2025	14:57:35 PM	75	1269.00	XCSE
GENMAB A/S	04-Apr-2025	14:57:35 PM	7	1269.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	14:57:35 PM	18	1269.00	CEUX
GENMAB A/S	04-Apr-2025	14:58:24 PM	34	1272.00	AQEU
GENMAB A/S	04-Apr-2025	14:58:43 PM	38	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:43 PM	30	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:43 PM	15	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:43 PM	23	1271.50	TQEX
GENMAB A/S	04-Apr-2025	14:58:46 PM	43	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:46 PM	38	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:46 PM	15	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:46 PM	13	1272.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:56 PM	84	1271.00	XCSE
GENMAB A/S	04-Apr-2025	14:58:56 PM	22	1271.00	CEUX
GENMAB A/S	04-Apr-2025	14:58:56 PM	62	1271.00	CEUX
GENMAB A/S	04-Apr-2025	14:59:16 PM	83	1270.00	XCSE
GENMAB A/S	04-Apr-2025	14:59:16 PM	87	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:00:23 PM	13	1271.00	CEUX
GENMAB A/S	04-Apr-2025	15:00:23 PM	58	1271.00	CEUX
GENMAB A/S	04-Apr-2025	15:00:47 PM	8	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:01:18 PM	5	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:01:40 PM	44	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:01:40 PM	1	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:01:40 PM	90	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:01:40 PM	9	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:01:51 PM	27	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:01:51 PM	5	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:01:51 PM	1	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:02:12 PM	5	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:02:12 PM	23	1271.50	TQEX
GENMAB A/S	04-Apr-2025	15:02:47 PM	9	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:02:52 PM	26	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:02:59 PM	12	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:03:10 PM	9	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:03:20 PM	9	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:03:27 PM	23	1271.00	TQEX
GENMAB A/S	04-Apr-2025	15:04:01 PM	18	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:04:24 PM	3	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:04:50 PM	37	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:04:50 PM	18	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:04:50 PM	16	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:05:17 PM	87	1272.00	XCSE
GENMAB A/S	04-Apr-2025	15:05:43 PM	87	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:05:43 PM	83	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:06:32 PM	2	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:06:46 PM	9	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:06:46 PM	76	1271.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:06:46 PM	23	1271.50	TQEX
GENMAB A/S	04-Apr-2025	15:06:58 PM	18	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:07:05 PM	9	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:07:18 PM	9	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:07:28 PM	18	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:07:47 PM	18	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:07:58 PM	9	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:08:06 PM	18	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:08:06 PM	7	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:08:30 PM	45	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:08:30 PM	12	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:09:44 PM	15	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:09:49 PM	72	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:10:00 PM	44	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:11:40 PM	23	1270.50	TQEX
GENMAB A/S	04-Apr-2025	15:11:40 PM	88	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:11:40 PM	36	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:11:40 PM	36	1271.00	CEUX
GENMAB A/S	04-Apr-2025	15:11:40 PM	20	1271.00	CEUX
GENMAB A/S	04-Apr-2025	15:11:40 PM	23	1270.50	AQEU
GENMAB A/S	04-Apr-2025	15:11:59 PM	10	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:11:59 PM	74	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:11:59 PM	23	1269.50	TQEX
GENMAB A/S	04-Apr-2025	15:12:29 PM	89	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:12:55 PM	50	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:13:26 PM	64	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:13:26 PM	20	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:14:50 PM	87	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:15:15 PM	36	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:15:15 PM	15	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:15:15 PM	23	1268.50	TQEX
GENMAB A/S	04-Apr-2025	15:15:15 PM	37	1268.50	AQEU
GENMAB A/S	04-Apr-2025	15:15:21 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:21 PM	26	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:21 PM	24	1268.50	TQEX
GENMAB A/S	04-Apr-2025	15:15:21 PM	17	1268.50	AQEU
GENMAB A/S	04-Apr-2025	15:15:35 PM	43	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:35 PM	4	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:35 PM	30	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:35 PM	36	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:39 PM	14	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:39 PM	25	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:39 PM	15	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:39 PM	38	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:15:42 PM	87	1270.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:15:44 PM	85	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:15:49 PM	16	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:15:49 PM	7	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:17:14 PM	11	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:17:14 PM	73	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:18:13 PM	1	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:18:17 PM	38	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:18:17 PM	30	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:18:17 PM	23	1270.00	TQEX
GENMAB A/S	04-Apr-2025	15:18:17 PM	5	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:18:17 PM	83	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:18:19 PM	85	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:18:19 PM	87	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:18:36 PM	2	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:19:11 PM	90	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:19:11 PM	23	1271.00	TQEX
GENMAB A/S	04-Apr-2025	15:19:11 PM	82	1271.00	CEUX
GENMAB A/S	04-Apr-2025	15:19:19 PM	38	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:19:19 PM	13	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:19:20 PM	11	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:19:45 PM	9	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:19:50 PM	73	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:20:03 PM	10	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:03 PM	4	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:04 PM	32	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:04 PM	10	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:05 PM	16	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	67	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	30	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	14	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	13	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	38	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	18	1271.50	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	31	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	53	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:20:10 PM	23	1271.00	TQEX
GENMAB A/S	04-Apr-2025	15:20:10 PM	24	1270.00	TQEX
GENMAB A/S	04-Apr-2025	15:20:10 PM	58	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:20:28 PM	24	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:21:06 PM	18	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:21:08 PM	72	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:21:08 PM	24	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:21:24 PM	85	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:21:24 PM	90	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:21:24 PM	15	1268.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:21:24 PM	24	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:21:24 PM	25	1269.50	AQEU
GENMAB A/S	04-Apr-2025	15:21:24 PM	8	1268.50	AQEU
GENMAB A/S	04-Apr-2025	15:21:37 PM	28	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:21:37 PM	24	1268.00	AQEU
GENMAB A/S	04-Apr-2025	15:21:38 PM	89	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:22:29 PM	45	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:22:56 PM	23	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:24:05 PM	39	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:24:07 PM	5	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:24:07 PM	15	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:24:25 PM	43	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:24:25 PM	38	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:24:25 PM	21	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:24:25 PM	11	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:24:25 PM	72	1269.50	CEUX
GENMAB A/S	04-Apr-2025	15:24:25 PM	20	1269.50	AQEU
GENMAB A/S	04-Apr-2025	15:24:33 PM	12	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:24:53 PM	25	1270.50	TQEX
GENMAB A/S	04-Apr-2025	15:24:53 PM	54	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:25:05 PM	89	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:25:05 PM	21	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:05 PM	4	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:05 PM	38	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:05 PM	30	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:05 PM	42	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:25:18 PM	25	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:25:35 PM	10	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:45 PM	83	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:25:45 PM	38	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:45 PM	40	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:45 PM	20	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:45 PM	15	1270.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:45 PM	16	1270.00	TQEX
GENMAB A/S	04-Apr-2025	15:25:45 PM	7	1270.00	TQEX
GENMAB A/S	04-Apr-2025	15:25:59 PM	7	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:25:59 PM	43	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:25:59 PM	34	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:25:59 PM	24	1269.00	TQEX
GENMAB A/S	04-Apr-2025	15:25:59 PM	50	1269.50	CEUX
GENMAB A/S	04-Apr-2025	15:25:59 PM	5	1269.50	AQEU
GENMAB A/S	04-Apr-2025	15:26:00 PM	25	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:26:08 PM	84	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:26:30 PM	79	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:26:30 PM	8	1267.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:26:30 PM	34	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:27:20 PM	57	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:27:20 PM	25	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:27:32 PM	28	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:27:32 PM	25	1265.50	TQEX
GENMAB A/S	04-Apr-2025	15:27:50 PM	56	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:27:50 PM	46	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:27:50 PM	1	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:27:50 PM	11	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:27:50 PM	24	1268.00	AQEU
GENMAB A/S	04-Apr-2025	15:28:49 PM	90	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:28:55 PM	83	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:00 PM	21	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:29:00 PM	26	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:29:09 PM	34	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:29:09 PM	14	1268.50	AQEU
GENMAB A/S	04-Apr-2025	15:29:09 PM	12	1268.50	AQEU
GENMAB A/S	04-Apr-2025	15:29:48 PM	6	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:29:54 PM	12	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	14	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	7	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	15	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	13	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	16	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	13	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	16	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:29:58 PM	35	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:30:07 PM	40	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:30:19 PM	86	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:30:19 PM	14	1270.00	CEUX
GENMAB A/S	04-Apr-2025	15:30:20 PM	60	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:30:20 PM	30	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:30:20 PM	23	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:30:20 PM	23	1269.50	TQEX
GENMAB A/S	04-Apr-2025	15:30:22 PM	23	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:30:22 PM	63	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:30:40 PM	89	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:30:40 PM	23	1268.50	TQEX
GENMAB A/S	04-Apr-2025	15:30:40 PM	43	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:30:40 PM	1	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:30:47 PM	26	1269.50	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:30:47 PM	15	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:30:50 PM	2	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:30:50 PM	1	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:30:50 PM	42	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:31:03 PM	43	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:03 PM	40	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:12 PM	8	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:12 PM	43	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:17 PM	34	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:18 PM	76	1273.00	CEUX
GENMAB A/S	04-Apr-2025	15:31:24 PM	31	1272.50	XCSE
GENMAB A/S	04-Apr-2025	15:31:24 PM	52	1272.50	XCSE
GENMAB A/S	04-Apr-2025	15:31:24 PM	8	1273.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:24 PM	15	1273.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:24 PM	27	1272.00	TQEX
GENMAB A/S	04-Apr-2025	15:31:25 PM	2	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:25 PM	3	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:25 PM	1	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:25 PM	43	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:25 PM	12	1271.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:28 PM	1	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:28 PM	1	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:31 PM	2	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:31 PM	15	1271.00	TQEX
GENMAB A/S	04-Apr-2025	15:31:31 PM	9	1271.00	TQEX
GENMAB A/S	04-Apr-2025	15:31:35 PM	3	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:35 PM	68	1270.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:40 PM	16	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:40 PM	24	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:40 PM	10	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:40 PM	29	1271.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:48 PM	1	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:48 PM	88	1270.00	XCSE
GENMAB A/S	04-Apr-2025	15:31:49 PM	4	1269.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:49 PM	1	1269.50	CEUX
GENMAB A/S	04-Apr-2025	15:31:53 PM	10	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:00 PM	28	1269.50	TQEX
GENMAB A/S	04-Apr-2025	15:32:00 PM	20	1269.50	CEUX
GENMAB A/S	04-Apr-2025	15:32:00 PM	24	1269.50	AQEU
GENMAB A/S	04-Apr-2025	15:32:03 PM	1	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:03 PM	79	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:07 PM	10	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:32:07 PM	14	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:32:10 PM	89	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:13 PM	28	1268.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:32:13 PM	14	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:32:13 PM	12	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:32:23 PM	5	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:23 PM	79	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:37 PM	23	1267.00	TQEX
GENMAB A/S	04-Apr-2025	15:32:37 PM	23	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:32:40 PM	25	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:40 PM	38	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:40 PM	44	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:40 PM	6	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:51 PM	23	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:54 PM	63	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:54 PM	1	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:54 PM	22	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:32:54 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:54 PM	30	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:32:54 PM	10	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:33:20 PM	88	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:33:29 PM	3	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:33:29 PM	19	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:33:29 PM	21	1268.00	TQEX
GENMAB A/S	04-Apr-2025	15:33:29 PM	3	1268.00	TQEX
GENMAB A/S	04-Apr-2025	15:33:29 PM	29	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:33:29 PM	42	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:33:50 PM	65	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:34:00 PM	4	1267.00	TQEX
GENMAB A/S	04-Apr-2025	15:34:00 PM	14	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:34:00 PM	5	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:34:04 PM	38	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:34:04 PM	22	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:34:04 PM	38	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:34:04 PM	83	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:34:04 PM	22	1267.00	TQEX
GENMAB A/S	04-Apr-2025	15:34:04 PM	32	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:34:04 PM	21	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:34:58 PM	38	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:34:58 PM	18	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:35:02 PM	26	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:02 PM	5	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:02 PM	6	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:02 PM	10	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:02 PM	6	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:35:06 PM	100	1269.50	XCSE
GENMAB A/S	04-Apr-2025	15:35:35 PM	40	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:39 PM	45	1269.00	XCSE

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:35:39 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:39 PM	15	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:39 PM	13	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:39 PM	64	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:35:39 PM	24	1268.50	TQEX
GENMAB A/S	04-Apr-2025	15:35:39 PM	89	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:35:46 PM	14	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:05 PM	87	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:05 PM	26	1269.00	TQEX
GENMAB A/S	04-Apr-2025	15:36:05 PM	36	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:08 PM	13	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:14 PM	11	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:21 PM	36	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:22 PM	3	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:22 PM	3	1269.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:24 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:24 PM	30	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:24 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:24 PM	30	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:24 PM	22	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:36:24 PM	43	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:36:24 PM	25	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:36:25 PM	13	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:25 PM	38	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:26 PM	30	1269.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:27 PM	22	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:27 PM	26	1268.00	TQEX
GENMAB A/S	04-Apr-2025	15:36:27 PM	26	1268.00	AQEU
GENMAB A/S	04-Apr-2025	15:36:44 PM	44	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:44 PM	15	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:44 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:50 PM	15	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:50 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:50 PM	12	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:55 PM	87	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:36:55 PM	90	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:36:55 PM	37	1267.00	AQEU
GENMAB A/S	04-Apr-2025	15:37:14 PM	86	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:37:14 PM	24	1267.50	TQEX
GENMAB A/S	04-Apr-2025	15:37:32 PM	20	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:37:32 PM	19	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:38:10 PM	74	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:10 PM	9	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:10 PM	19	1267.00	TQEX
GENMAB A/S	04-Apr-2025	15:38:10 PM	50	1267.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:38:50 PM	38	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:50 PM	20	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	15	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	9	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	14	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	14	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	14	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	38	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	14	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	16	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:38:51 PM	16	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	15	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	15	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	20	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	2	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	5	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	2	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:00 PM	85	1266.00	XCSE
GENMAB A/S	04-Apr-2025	15:39:22 PM	23	1266.00	TQEX
GENMAB A/S	04-Apr-2025	15:39:22 PM	36	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:39:22 PM	37	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:39:28 PM	11	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:39:30 PM	36	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:39:47 PM	88	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:39:57 PM	54	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:40:00 PM	44	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:00 PM	11	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:00 PM	38	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:00 PM	11	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:00 PM	9	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:19 PM	87	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:19 PM	13	1266.00	TQEX
GENMAB A/S	04-Apr-2025	15:40:19 PM	84	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:40:40 PM	44	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:40 PM	6	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:40 PM	4	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:40 PM	28	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:40 PM	66	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:44 PM	17	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:40:45 PM	27	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:40:48 PM	90	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:41:15 PM	88	1264.00	XCSE
GENMAB A/S	04-Apr-2025	15:41:28 PM	2	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:41:34 PM	11	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:41:39 PM	32	1265.00	CEUX

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:41:39 PM	22	1264.50	AQEU
GENMAB A/S	04-Apr-2025	15:42:04 PM	43	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:42:35 PM	37	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:42:35 PM	47	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:42:40 PM	32	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:40 PM	1	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:40 PM	39	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:42 PM	3	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:45 PM	13	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:45 PM	27	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:47 PM	9	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:47 PM	9	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:47 PM	26	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:57 PM	12	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:42:57 PM	9	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:43:00 PM	36	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:43:00 PM	33	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:43:00 PM	43	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:43:00 PM	46	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:43:07 PM	83	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:43:07 PM	38	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:43:07 PM	5	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:43:07 PM	41	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:43:09 PM	1	1264.50	AQEU
GENMAB A/S	04-Apr-2025	15:43:10 PM	44	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:43:10 PM	30	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:43:10 PM	25	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:43:10 PM	14	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:43:31 PM	14	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:43:40 PM	100	1266.00	XCSE
GENMAB A/S	04-Apr-2025	15:44:20 PM	17	1266.50	TQEX
GENMAB A/S	04-Apr-2025	15:44:20 PM	10	1266.50	TQEX
GENMAB A/S	04-Apr-2025	15:44:27 PM	84	1266.00	XCSE
GENMAB A/S	04-Apr-2025	15:44:30 PM	60	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:44:30 PM	38	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:30 PM	9	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:30 PM	6	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:30 PM	23	1265.50	TQEX
GENMAB A/S	04-Apr-2025	15:44:30 PM	12	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:44:30 PM	72	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:44:47 PM	30	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:47 PM	14	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:47 PM	38	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:47 PM	15	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:47 PM	24	1265.00	AQEU

100

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:44:48 PM	16	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:48 PM	30	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:49 PM	13	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:44:49 PM	15	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:03 PM	39	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:03 PM	2	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:03 PM	38	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:03 PM	6	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:03 PM	88	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:14 PM	24	1264.50	TQEX
GENMAB A/S	04-Apr-2025	15:45:14 PM	10	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:45:14 PM	79	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:45:20 PM	38	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:20 PM	10	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:20 PM	30	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:20 PM	14	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:45:40 PM	23	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:45:50 PM	85	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:45:50 PM	27	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:46:00 PM	1	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:46:41 PM	48	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:46:43 PM	12	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:47:11 PM	43	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:11 PM	68	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:11 PM	2	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:12 PM	100	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:12 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:12 PM	100	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:12 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:13 PM	100	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:13 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:13 PM	20	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:13 PM	87	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:47:13 PM	34	1267.50	AQEU
GENMAB A/S	04-Apr-2025	15:47:28 PM	90	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:28 PM	83	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:35 PM	24	1267.50	TQEX
GENMAB A/S	04-Apr-2025	15:47:45 PM	61	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:45 PM	27	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:47:45 PM	11	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:46 PM	36	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:46 PM	23	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:48 PM	1	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:48 PM	26	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:49 PM	8	1267.00	CEUX

101

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:47:49 PM	9	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:49 PM	8	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:47:51 PM	25	1266.50	TQEX
GENMAB A/S	04-Apr-2025	15:47:51 PM	37	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:47:51 PM	53	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:48:00 PM	31	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:19 PM	24	1266.00	TQEX
GENMAB A/S	04-Apr-2025	15:48:27 PM	46	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:27 PM	43	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:48:27 PM	44	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:48:28 PM	88	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:48 PM	86	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:48 PM	27	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:49 PM	1	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:49 PM	16	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:49 PM	15	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:48:51 PM	89	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:04 PM	25	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:49:08 PM	10	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:49:08 PM	3	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:49:08 PM	12	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:49:10 PM	86	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:14 PM	88	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:49:30 PM	45	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:30 PM	11	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:30 PM	3	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:30 PM	38	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:50 PM	45	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:49:50 PM	25	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:49:50 PM	38	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:50 PM	5	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:49:59 PM	28	1264.00	TQEX
GENMAB A/S	04-Apr-2025	15:50:00 PM	6	1264.00	CEUX
GENMAB A/S	04-Apr-2025	15:50:32 PM	28	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:50:32 PM	15	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:50:32 PM	15	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:51:00 PM	26	1265.50	TQEX
GENMAB A/S	04-Apr-2025	15:51:00 PM	21	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:51:00 PM	36	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:51:00 PM	63	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:51:04 PM	30	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:51:10 PM	36	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:51:50 PM	27	1264.50	TQEX
GENMAB A/S	04-Apr-2025	15:51:53 PM	1	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:51:55 PM	18	1264.50	XCSE

102

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:51:55 PM	68	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:52:05 PM	46	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:52:05 PM	36	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:52:05 PM	20	1264.00	AQEU
GENMAB A/S	04-Apr-2025	15:52:25 PM	38	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:52:25 PM	21	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:52:25 PM	8	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:52:25 PM	11	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:52:25 PM	2	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:52:25 PM	23	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:52:50 PM	85	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:52:53 PM	5	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:52:58 PM	2	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	38	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	46	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	29	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	9	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	22	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	33	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	11	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	19	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	38	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	32	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:03 PM	36	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:53:04 PM	16	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:04 PM	15	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:04 PM	38	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:34 PM	40	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:53:49 PM	45	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:53:49 PM	68	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:53:49 PM	15	1268.50	TQEX
GENMAB A/S	04-Apr-2025	15:53:49 PM	20	1268.50	TQEX
GENMAB A/S	04-Apr-2025	15:53:49 PM	37	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:53:49 PM	36	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:53:49 PM	11	1268.50	CEUX
GENMAB A/S	04-Apr-2025	15:54:03 PM	11	1267.50	TQEX
GENMAB A/S	04-Apr-2025	15:54:03 PM	13	1267.50	TQEX
GENMAB A/S	04-Apr-2025	15:54:03 PM	84	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:54:03 PM	25	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:54:19 PM	31	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:19 PM	5	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:19 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:19 PM	13	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:19 PM	14	1268.00	XCSE

103

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:54:19 PM	40	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:19 PM	14	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:20 PM	85	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:54:45 PM	83	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:45 PM	45	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:45 PM	21	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:45 PM	40	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:54:45 PM	88	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:54:52 PM	24	1266.50	TQEX
GENMAB A/S	04-Apr-2025	15:54:52 PM	85	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:54:52 PM	30	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:55:01 PM	19	1266.00	XCSE
GENMAB A/S	04-Apr-2025	15:55:01 PM	68	1266.00	XCSE
GENMAB A/S	04-Apr-2025	15:55:02 PM	8	1266.50	CEUX
GENMAB A/S	04-Apr-2025	15:55:11 PM	15	1265.50	CEUX
GENMAB A/S	04-Apr-2025	15:55:17 PM	10	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:55:17 PM	7	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:55:17 PM	13	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:55:17 PM	14	1265.50	XCSE
GENMAB A/S	04-Apr-2025	15:55:17 PM	20	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:55:17 PM	3	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:55:17 PM	65	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:55:20 PM	46	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:55:20 PM	34	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:55:20 PM	88	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:55:27 PM	14	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:55:27 PM	27	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:55:50 PM	89	1265.00	CEUX
GENMAB A/S	04-Apr-2025	15:55:53 PM	12	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:55:53 PM	26	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:56:20 PM	39	1263.50	XCSE
GENMAB A/S	04-Apr-2025	15:56:20 PM	3	1264.00	AQEU
GENMAB A/S	04-Apr-2025	15:56:37 PM	84	1264.00	CEUX
GENMAB A/S	04-Apr-2025	15:56:44 PM	8	1264.00	TQEX
GENMAB A/S	04-Apr-2025	15:56:44 PM	17	1264.00	TQEX
GENMAB A/S	04-Apr-2025	15:56:53 PM	15	1264.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:53 PM	25	1264.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:53 PM	47	1263.50	XCSE
GENMAB A/S	04-Apr-2025	15:56:57 PM	15	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:57 PM	15	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:58 PM	15	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:58 PM	15	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:58 PM	13	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:56:59 PM	16	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:00 PM	30	1264.50	XCSE

104

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:57:00 PM	40	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:57:00 PM	14	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:57:00 PM	15	1264.50	XCSE
GENMAB A/S	04-Apr-2025	15:57:00 PM	83	1264.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:00 PM	23	1264.00	TQEX
GENMAB A/S	04-Apr-2025	15:57:00 PM	16	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:57:00 PM	72	1264.50	CEUX
GENMAB A/S	04-Apr-2025	15:57:28 PM	84	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:29 PM	43	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:29 PM	40	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:29 PM	14	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:29 PM	14	1265.00	XCSE
GENMAB A/S	04-Apr-2025	15:57:29 PM	20	1264.50	AQEU
GENMAB A/S	04-Apr-2025	15:57:44 PM	3	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:57:44 PM	23	1265.00	TQEX
GENMAB A/S	04-Apr-2025	15:57:49 PM	28	1266.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:12 PM	85	1267.50	XCSE
GENMAB A/S	04-Apr-2025	15:58:12 PM	27	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:12 PM	61	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:24 PM	88	1266.50	XCSE
GENMAB A/S	04-Apr-2025	15:58:24 PM	44	1267.00	XCSE
GENMAB A/S	04-Apr-2025	15:58:24 PM	14	1267.00	TQEX
GENMAB A/S	04-Apr-2025	15:58:24 PM	15	1267.00	TQEX
GENMAB A/S	04-Apr-2025	15:58:24 PM	25	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:24 PM	27	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:24 PM	3	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:24 PM	23	1267.00	CEUX
GENMAB A/S	04-Apr-2025	15:58:36 PM	84	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:58:36 PM	83	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:59:12 PM	27	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:12 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	10	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	74	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	40	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	27	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	6	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	16	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	15	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	27	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	15	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:17 PM	12	1268.00	TQEX
GENMAB A/S	04-Apr-2025	15:59:17 PM	14	1268.00	TQEX
GENMAB A/S	04-Apr-2025	15:59:17 PM	62	1268.00	CEUX

105

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	15:59:17 PM	28	1268.00	CEUX
GENMAB A/S	04-Apr-2025	15:59:18 PM	27	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:18 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:18 PM	16	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:18 PM	14	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:18 PM	75	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:59:18 PM	9	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	5	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	11	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	15	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	33	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	9	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	27	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	14	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	15	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:40 PM	17	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:41 PM	13	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:41 PM	40	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:41 PM	15	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:41 PM	9	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:44 PM	14	1268.50	XCSE
GENMAB A/S	04-Apr-2025	15:59:44 PM	86	1268.00	XCSE
GENMAB A/S	04-Apr-2025	15:59:52 PM	39	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:59:52 PM	45	1267.50	CEUX
GENMAB A/S	04-Apr-2025	15:59:59 PM	16	1268.00	XCSE
GENMAB A/S	04-Apr-2025	16:00:00 PM	29	1267.50	TQEX
GENMAB A/S	04-Apr-2025	16:00:01 PM	88	1267.00	XCSE
GENMAB A/S	04-Apr-2025	16:00:01 PM	66	1266.50	CEUX
GENMAB A/S	04-Apr-2025	16:00:01 PM	19	1266.50	CEUX
GENMAB A/S	04-Apr-2025	16:00:09 PM	89	1267.00	XCSE
GENMAB A/S	04-Apr-2025	16:00:09 PM	23	1267.00	AQEU
GENMAB A/S	04-Apr-2025	16:00:19 PM	85	1266.50	CEUX
GENMAB A/S	04-Apr-2025	16:00:29 PM	86	1266.00	XCSE
GENMAB A/S	04-Apr-2025	16:00:30 PM	51	1265.50	CEUX
GENMAB A/S	04-Apr-2025	16:00:30 PM	35	1265.50	CEUX
GENMAB A/S	04-Apr-2025	16:00:31 PM	83	1265.50	XCSE
GENMAB A/S	04-Apr-2025	16:01:04 PM	20	1267.00	AQEU
GENMAB A/S	04-Apr-2025	16:01:06 PM	86	1267.00	XCSE
GENMAB A/S	04-Apr-2025	16:01:06 PM	25	1267.00	TQEX
GENMAB A/S	04-Apr-2025	16:01:06 PM	84	1267.00	CEUX
GENMAB A/S	04-Apr-2025	16:01:06 PM	6	1267.00	AQEU
GENMAB A/S	04-Apr-2025	16:01:20 PM	12	1265.50	XCSE
GENMAB A/S	04-Apr-2025	16:01:20 PM	47	1266.00	CEUX

106

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	16:01:42 PM	85	1266.50	XCSE
GENMAB A/S	04-Apr-2025	16:01:42 PM	23	1266.50	TQEX
GENMAB A/S	04-Apr-2025	16:01:44 PM	44	1266.50	XCSE
GENMAB A/S	04-Apr-2025	16:01:44 PM	40	1266.50	XCSE
GENMAB A/S	04-Apr-2025	16:01:44 PM	29	1266.50	XCSE
GENMAB A/S	04-Apr-2025	16:01:44 PM	20	1266.00	CEUX
GENMAB A/S	04-Apr-2025	16:01:44 PM	20	1266.00	CEUX
GENMAB A/S	04-Apr-2025	16:02:20 PM	23	1266.00	TQEX
GENMAB A/S	04-Apr-2025	16:02:20 PM	84	1266.00	CEUX
GENMAB A/S	04-Apr-2025	16:02:20 PM	3	1266.00	CEUX
GENMAB A/S	04-Apr-2025	16:02:20 PM	23	1266.00	AQEU
GENMAB A/S	04-Apr-2025	16:02:50 PM	74	1265.50	XCSE
GENMAB A/S	04-Apr-2025	16:02:51 PM	41	1265.50	XCSE
GENMAB A/S	04-Apr-2025	16:02:51 PM	7	1265.50	XCSE
GENMAB A/S	04-Apr-2025	16:03:15 PM	44	1265.00	XCSE
GENMAB A/S	04-Apr-2025	16:03:15 PM	25	1265.00	XCSE
GENMAB A/S	04-Apr-2025	16:03:15 PM	53	1264.50	XCSE
GENMAB A/S	04-Apr-2025	16:04:00 PM	35	1264.50	XCSE
GENMAB A/S	04-Apr-2025	16:04:00 PM	25	1265.00	TQEX
GENMAB A/S	04-Apr-2025	16:04:10 PM	11	1265.00	XCSE
GENMAB A/S	04-Apr-2025	16:04:11 PM	13	1265.00	XCSE
GENMAB A/S	04-Apr-2025	16:04:30 PM	1	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:04:33 PM	43	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:04:33 PM	41	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:04:33 PM	36	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:04:33 PM	23	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:04:33 PM	25	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:00 PM	7	1264.50	XCSE
GENMAB A/S	04-Apr-2025	16:05:00 PM	40	1264.50	XCSE
GENMAB A/S	04-Apr-2025	16:05:00 PM	26	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:05:00 PM	36	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	36	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	1	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	26	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	3	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	14	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	6	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:01 PM	7	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:05:07 PM	61	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:05:07 PM	30	1264.00	TQEX
GENMAB A/S	04-Apr-2025	16:05:07 PM	21	1264.00	AQEU
GENMAB A/S	04-Apr-2025	16:05:07 PM	13	1264.00	AQEU
GENMAB A/S	04-Apr-2025	16:05:23 PM	12	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:05:27 PM	11	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:05:28 PM	12	1264.00	CEUX

107

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	16:05:28 PM	10	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:05:36 PM	19	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:05:40 PM	46	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:05:40 PM	25	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:05:46 PM	36	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:06:03 PM	40	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	33	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	14	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	15	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	11	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	35	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	40	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	32	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	6	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:03 PM	13	1263.50	CEUX
GENMAB A/S	04-Apr-2025	16:06:03 PM	21	1263.50	CEUX
GENMAB A/S	04-Apr-2025	16:06:03 PM	22	1263.50	CEUX
GENMAB A/S	04-Apr-2025	16:06:03 PM	33	1263.50	CEUX
GENMAB A/S	04-Apr-2025	16:06:04 PM	16	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:04 PM	14	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:04 PM	32	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:04 PM	40	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:04 PM	11	1264.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:06 PM	29	1264.00	TQEX
GENMAB A/S	04-Apr-2025	16:06:30 PM	14	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:06:48 PM	4	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:06:50 PM	36	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:06:52 PM	36	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:06:52 PM	8	1264.00	CEUX
GENMAB A/S	04-Apr-2025	16:06:53 PM	14	1263.50	CEUX
GENMAB A/S	04-Apr-2025	16:06:57 PM	40	1263.50	XCSE
GENMAB A/S	04-Apr-2025	16:06:57 PM	20	1263.50	XCSE
GENMAB A/S	04-Apr-2025	16:06:57 PM	32	1263.50	XCSE
GENMAB A/S	04-Apr-2025	16:06:57 PM	84	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:06:57 PM	74	1263.50	CEUX
GENMAB A/S	04-Apr-2025	16:06:57 PM	26	1263.50	AQEU
GENMAB A/S	04-Apr-2025	16:06:58 PM	23	1263.00	TQEX
GENMAB A/S	04-Apr-2025	16:07:03 PM	9	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:07:03 PM	22	1262.50	AQEU
GENMAB A/S	04-Apr-2025	16:07:19 PM	40	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:07:19 PM	49	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:07:19 PM	12	1262.50	CEUX
GENMAB A/S	04-Apr-2025	16:07:19 PM	1	1262.50	AQEU
GENMAB A/S	04-Apr-2025	16:07:20 PM	11	1263.00	CEUX
GENMAB A/S	04-Apr-2025	16:07:27 PM	44	1263.00	XCSE

108

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	16:07:27 PM	49	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:07:27 PM	11	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:07:27 PM	9	1263.00	XCSE
GENMAB A/S	04-Apr-2025	16:07:27 PM	23	1262.00	TQEX
GENMAB A/S	04-Apr-2025	16:07:27 PM	21	1263.00	CEUX
GENMAB A/S	04-Apr-2025	16:07:27 PM	74	1262.50	CEUX
GENMAB A/S	04-Apr-2025	16:07:28 PM	13	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:28 PM	27	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:28 PM	7	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:28 PM	9	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:35 PM	10	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:35 PM	49	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:35 PM	6	1262.50	XCSE
GENMAB A/S	04-Apr-2025	16:07:38 PM	20	1262.50	CEUX
GENMAB A/S	04-Apr-2025	16:07:38 PM	65	1262.50	CEUX
GENMAB A/S	04-Apr-2025	16:08:26 PM	19	1264.50	TQEX
GENMAB A/S	04-Apr-2025	16:08:26 PM	15	1264.50	TQEX
GENMAB A/S	04-Apr-2025	16:08:27 PM	40	1265.00	XCSE
GENMAB A/S	04-Apr-2025	16:08:27 PM	46	1265.00	XCSE
GENMAB A/S	04-Apr-2025	16:08:30 PM	27	1265.50	CEUX
GENMAB A/S	04-Apr-2025	16:09:08 PM	20	1265.00	CEUX
GENMAB A/S	04-Apr-2025	16:09:09 PM	36	1265.00	CEUX
GENMAB A/S	04-Apr-2025	16:09:10 PM	26	1265.00	CEUX
GENMAB A/S	04-Apr-2025	16:09:21 PM	1	1264.50	TQEX
GENMAB A/S	04-Apr-2025	16:09:21 PM	25	1264.50	TQEX
GENMAB A/S	04-Apr-2025	16:09:21 PM	3	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:09:21 PM	81	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:09:36 PM	12	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:09:36 PM	8	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:09:36 PM	3	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:10:03 PM	20	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:10:08 PM	32	1264.50	TQEX
GENMAB A/S	04-Apr-2025	16:10:08 PM	51	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:10:08 PM	15	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:10:09 PM	36	1264.50	CEUX
GENMAB A/S	04-Apr-2025	16:11:21 PM	31	1263.50	TQEX
GENMAB A/S	04-Apr-2025	16:12:24 PM	27	1262.00	TQEX
GENMAB A/S	04-Apr-2025	16:12:25 PM	25	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:13:24 PM	27	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:15:10 PM	33	1262.00	TQEX
GENMAB A/S	04-Apr-2025	16:15:20 PM	28	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:16:03 PM	19	1260.00	TQEX
GENMAB A/S	04-Apr-2025	16:16:16 PM	3	1260.00	TQEX
GENMAB A/S	04-Apr-2025	16:16:16 PM	5	1260.00	TQEX
GENMAB A/S	04-Apr-2025	16:17:34 PM	7	1261.00	TQEX

109

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	16:17:34 PM	20	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:18:18 PM	20	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:18:18 PM	7	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:18:18 PM	8	1261.00	TQEX
GENMAB A/S	04-Apr-2025	16:20:22 PM	36	1260.50	TQEX
GENMAB A/S	04-Apr-2025	16:21:02 PM	26	1259.50	TQEX
GENMAB A/S	04-Apr-2025	16:21:29 PM	34	1260.00	TQEX
GENMAB A/S	04-Apr-2025	16:21:56 PM	35	1258.50	TQEX
GENMAB A/S	04-Apr-2025	16:22:20 PM	24	1258.00	TQEX
GENMAB A/S	04-Apr-2025	16:23:31 PM	26	1258.00	TQEX
GENMAB A/S	04-Apr-2025	16:23:42 PM	28	1257.00	TQEX
GENMAB A/S	04-Apr-2025	16:25:24 PM	28	1256.00	TQEX
GENMAB A/S	04-Apr-2025	16:26:51 PM	29	1256.00	TQEX
GENMAB A/S	04-Apr-2025	16:27:22 PM	8	1255.00	TQEX
GENMAB A/S	04-Apr-2025	16:27:22 PM	18	1255.00	TQEX
GENMAB A/S	04-Apr-2025	16:28:15 PM	26	1255.00	TQEX
GENMAB A/S	04-Apr-2025	16:28:33 PM	25	1255.00	TQEX
GENMAB A/S	04-Apr-2025	16:29:44 PM	26	1254.00	TQEX
GENMAB A/S	04-Apr-2025	16:30:09 PM	26	1255.00	TQEX
GENMAB A/S	04-Apr-2025	16:30:09 PM	25	1255.00	TQEX
GENMAB A/S	04-Apr-2025	16:30:44 PM	27	1256.00	TQEX
GENMAB A/S	04-Apr-2025	16:31:55 PM	36	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:34:44 PM	28	1251.50	TQEX
GENMAB A/S	04-Apr-2025	16:36:03 PM	23	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:37:23 PM	6	1253.00	TQEX
GENMAB A/S	04-Apr-2025	16:37:23 PM	21	1253.00	TQEX
GENMAB A/S	04-Apr-2025	16:37:44 PM	27	1253.00	TQEX
GENMAB A/S	04-Apr-2025	16:40:30 PM	1	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:40:30 PM	22	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:40:36 PM	37	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:41:32 PM	25	1252.50	TQEX
GENMAB A/S	04-Apr-2025	16:41:38 PM	23	1252.50	TQEX
GENMAB A/S	04-Apr-2025	16:41:47 PM	10	1252.50	TQEX
GENMAB A/S	04-Apr-2025	16:42:17 PM	13	1252.50	TQEX
GENMAB A/S	04-Apr-2025	16:44:40 PM	46	1252.00	TQEX
GENMAB A/S	04-Apr-2025	16:45:11 PM	30	1251.00	TQEX
GENMAB A/S	04-Apr-2025	16:46:34 PM	24	1249.50	TQEX
GENMAB A/S	04-Apr-2025	16:47:28 PM	15	1249.00	TQEX
GENMAB A/S	04-Apr-2025	16:48:03 PM	21	1249.50	TQEX
GENMAB A/S	04-Apr-2025	16:48:06 PM	27	1249.50	TQEX
GENMAB A/S	04-Apr-2025	16:48:50 PM	15	1249.00	TQEX
GENMAB A/S	04-Apr-2025	16:49:33 PM	29	1248.50	TQEX
GENMAB A/S	04-Apr-2025	16:49:38 PM	6	1248.50	TQEX
GENMAB A/S	04-Apr-2025	16:49:38 PM	6	1248.50	TQEX
GENMAB A/S	04-Apr-2025	16:50:03 PM	55	1249.00	TQEX

110

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 3 – April 4, 2025

GENMAB A/S	04-Apr-2025	16:50:44 PM	39	1248.00	TQEX
GENMAB A/S	04-Apr-2025	16:51:34 PM	3	1250.50	TQEX
GENMAB A/S	04-Apr-2025	16:52:26 PM	47	1251.00	TQEX
GENMAB A/S	04-Apr-2025	16:53:17 PM	21	1251.00	TQEX
GENMAB A/S	04-Apr-2025	16:53:45 PM	20	1251.50	TQEX
GENMAB A/S	04-Apr-2025	16:54:28 PM	15	1253.00	TQEX
GENMAB A/S	04-Apr-2025	16:54:28 PM	4	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:54:28 PM	5	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:54:28 PM	15	1253.50	TQEX
GENMAB A/S	04-Apr-2025	16:54:42 PM	87	1252.50	TQEX

111