CoStar Group Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Sep 30, 2025	84.22	84.74	83.15	84.64	-	0.49%	1,576,619
Sep 29, 2025	84.73	84.73	83.66	84.23	84.23	0.29%	2,394,433
Sep 26, 2025	83.09	84.41	82.80	83.99	83.99	1.08%	3,091,205
Sep 25, 2025	84.05	84.42	82.91	83.09	83.09	-1.14%	3,275,545
Sep 24, 2025	85.56	85.60	83.86	84.05	84.05	-1.48%	2,703,819
Sep 23, 2025	86.32	86.57	85.06	85.31	85.31	-1.16%	3,309,883
Sep 22, 2025	86.70	86.99	85.27	86.31	86.31	-0.91%	2,828,004
Sep 19, 2025	89.40	89.80	86.92	87.10	87.10	-2.42%	5,822,569
Sep 18, 2025	87.91	89.56	87.51	89.26	89.26	1.58%	2,177,142
Sep 17, 2025	88.72	90.72	87.78	87.87	87.87	-0.30%	3,011,615
Sep 16, 2025	88.63	88.84	87.22	88.13	88.13	-0.94%	2,116,033
Sep 15, 2025	87.14	89.46	87.13	88.97	88.97	2.50%	2,954,115
Sep 12, 2025	86.68	87.39	86.43	86.80	86.80	-0.30%	1,261,443
Sep 11, 2025	86.48	87.52	86.19	87.06	87.06	0.88%	2,322,428
Sep 10, 2025	88.26	88.33	85.13	86.30	86.30	-2.09%	3,254,024
Sep 9, 2025	87.88	88.74	87.12	88.14	88.14	0.09%	2,625,984
Sep 8, 2025	89.16	91.01	87.84	88.06	88.06	-1.56%	2,826,633
Sep 5, 2025	89.77	91.89	89.15	89.46	89.46	0.40%	1,666,570
Sep 4, 2025	88.16	89.16	87.55	89.10	89.10	1.41%	1,652,884
Sep 3, 2025	88.10	88.82	87.35	87.86	87.86	-0.30%	1,981,011
Sep 2, 2025	88.87	88.98	87.48	88.12	88.12	-1.53%	2,081,151
Aug 29, 2025	90.14	90.54	89.11	89.49	89.49	-0.93%	1,974,761
Aug 28, 2025	89.52	90.60	88.71	90.33	90.33	0.98%	1,988,975
Aug 27, 2025	89.12	89.66	88.14	89.45	89.45	0.09%	1,877,535
Aug 26, 2025	90.37	90.59	88.83	89.37	89.37	-1.26%	2,247,228
Aug 25, 2025	90.86	91.48	90.29	90.51	90.51	-0.78%	1,687,481
Aug 22, 2025	88.52	91.50	88.52	91.22	91.22	3.24%	2,876,277
Aug 21, 2025	87.68	88.66	87.49	88.36	88.36	0.12%	2,065,804
Aug 20, 2025	89.00	89.56	88.21	88.25	88.25	-0.79%	2,881,769
Aug 19, 2025	88.23	89.40	87.65	88.95	88.95	0.90%	2,452,159
Aug 18, 2025	89.27	89.50	88.10	88.16	88.16	-1.67%	2,725,642
Aug 15, 2025	87.97	89.72	87.73	89.66	89.66	1.92%	2,534,755
Aug 14, 2025	87.34	89.32	87.17	87.97	87.97	0.47%	2,943,620
Aug 13, 2025	89.15	89.30	84.57	87.56	87.56	-1.02%	5,494,975
Aug 12, 2025	92.82	92.99	87.78	88.46	88.46	-4.37%	5,088,579
Aug 11, 2025	94.23	94.95	92.33	92.50	92.50	-2.12%	2,477,861
Aug 8, 2025	95.53	96.27	94.33	94.50	94.50	-0.88%	2,429,530
Aug 7, 2025	96.83	97.12	95.25	95.34	95.34	-0.99%	2,185,701
Aug 6, 2025	97.19	97.40	96.08	96.29	96.29	-0.28%	2,818,862
Aug 5, 2025	96.89	97.43	96.03	96.56	96.56	-0.28%	2,878,202
Aug 4, 2025	95.53	96.88	94.96	96.83	96.83	2.36%	2,247,743
Aug 1, 2025	94.70	95.35	93.70	94.60	94.60	-0.62%	2,841,265
Jul 31, 2025	96.10	96.73	94.77	95.19	95.19	-1.10%	3,099,593
Jul 30, 2025	95.51	97.15	95.14	96.25	96.25	0.69%	3,576,286
Jul 29, 2025	93.69	95.66	93.49	95.59	95.59	2.39%	3,968,882
Jul 28, 2025	92.85	93.67	92.42	93.36	93.36	0.42%	2,619,096
Jul 25, 2025	93.38	93.65	92.33	92.97	92.97	0.01%	2,529,650
Jul 24, 2025	90.84	93.75	90.47	92.96	92.96	2.15%	4,461,607
Jul 23, 2025	88.24	91.13	88.24	91.00	91.00	6.86%	6,652,481
Jul 22, 2025	85.02	86.59	84.26	85.16	85.16	0.18%	4,521,120