CoStar Group Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Sep 18, 2026	29.34	29.34	29.26	29.26	-	-0.12%	631,238
Sep 17, 2026	30.48	30.59	29.24	29.30	29.30	-3.51%	4,820,566
Sep 16, 2026	31.25	31.43	30.27	30.36	30.36	-3.80%	4,667,417
Sep 15, 2026	31.15	31.79	30.70	31.56	31.56	0.13%	6,722,572
Sep 14, 2026	31.17	31.83	30.75	31.52	31.52	3.48%	5,796,748
Sep 11, 2026	29.72	30.60	29.71	30.46	30.46	3.29%	6,196,500
Sep 10, 2026	29.64	30.14	28.79	29.49	29.49	-0.30%	7,239,503
Sep 9, 2026	30.02	30.29	29.33	29.58	29.58	-2.50%	4,448,793
Sep 8, 2026	30.55	30.63	29.66	30.34	30.34	-1.84%	6,128,486
Sep 4, 2026	31.25	31.33	30.32	30.91	30.91	-2.43%	3,875,315
Sep 3, 2026	31.84	32.79	31.22	31.68	31.68	1.34%	4,540,990
Sep 2, 2026	31.97	32.65	31.20	31.26	31.26	-2.25%	5,170,267
Sep 1, 2026	32.00	32.46	31.40	31.98	31.98	-0.28%	6,137,589
Aug 31, 2026	31.95	32.59	31.79	32.07	32.07	-0.47%	33,462,504
Aug 28, 2026	31.71	32.59	31.45	32.22	32.22	2.81%	4,336,722
Aug 27, 2026	32.05	32.49	31.29	31.34	31.34	-2.49%	5,425,507
Aug 26, 2026	32.31	32.92	31.74	32.14	32.14	-2.04%	4,800,641
Aug 25, 2026	32.59	33.28	32.25	32.81	32.81	-0.09%	4,915,535
Aug 24, 2026	32.52	32.90	32.29	32.84	32.84	1.80%	5,035,045
Aug 21, 2026	32.51	33.26	31.99	32.26	32.26	-	4,752,241
Aug 20, 2026	33.46	33.63	31.72	32.26	32.26	-4.36%	6,621,580
Aug 19, 2026	31.28	33.82	31.20	33.73	33.73	7.49%	5,818,509
Aug 18, 2026	32.03	32.30	31.30	31.38	31.38	0.10%	3,845,911
Aug 17, 2026	31.95	32.15	30.99	31.35	31.35	-3.18%	4,936,570
Aug 14, 2026	33.28	33.30	31.86	32.38	32.38	-2.03%	5,996,714
Aug 13, 2026	30.68	33.10	30.68	33.05	33.05	8.36%	7,965,595
Aug 12, 2026	30.65	31.08	30.22	30.50	30.50	-1.99%	4,275,928
Aug 11, 2026	31.25	31.52	30.65	31.12	31.12	-1.14%	4,039,545
Aug 10, 2026	30.04	31.49	30.04	31.48	31.48	4.10%	6,164,647
Aug 7, 2026	30.05	31.68	30.04	30.24	30.24	2.23%	6,205,720
Aug 6, 2026	29.89	30.22	29.27	29.58	29.58	-2.09%	7,812,176
Aug 5, 2026	30.61	30.75	29.53	30.21	30.21	1.32%	6,644,448
Aug 4, 2026	29.42	30.07	29.35	29.82	29.82	-0.72%	5,794,402
Aug 3, 2026	29.47	30.18	29.26	30.03	30.03	4.42%	6,026,896
Jul 31, 2026	29.02	29.38	28.38	28.76	28.76	-2.38%	8,230,526
Jul 30, 2026	28.27	29.57	28.13	29.46	29.46	-1.24%	12,134,878
Jul 29, 2026	26.03	30.45	25.89	29.83	29.83	-1.65%	17,582,014
Jul 28, 2026	29.90	31.40	29.75	30.33	30.33	3.98%	9,819,862
Jul 27, 2026	28.05	29.92	28.04	29.17	29.17	5.46%	9,804,610
Jul 24, 2026	27.28	28.09	27.09	27.66	27.66	1.92%	6,847,037
Jul 23, 2026	27.89	28.03	26.77	27.14	27.14	-1.99%	7,157,566
Jul 22, 2026	28.76	28.92	27.48	27.69	27.69	-2.84%	5,635,788
Jul 21, 2026	28.63	29.39	28.34	28.50	28.50	-3.98%	5,576,457
Jul 20, 2026	29.50	29.90	28.85	29.68	29.68	-0.34%	6,352,309
Jul 17, 2026	30.64	31.01	29.59	29.78	29.78	-1.94%	5,898,564
Jul 16, 2026	29.07	30.52	28.96	30.37	30.37	6.60%	8,941,693
Jul 15, 2026	28.04	29.25	27.96	28.49	28.49	2.93%	7,340,746
Jul 14, 2026	27.00	28.00	26.68	27.68	27.68	-3.79%	14,088,957
Jul 13, 2026	28.88	29.38	28.22	28.77	28.77	1.34%	6,451,072
Jul 10, 2026	29.67	30.05	28.09	28.39	28.39	-2.74%	5,916,305