CoStar Group Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Oct 28, 2026	30.00	30.68	26.86	27.54	27.54	-13.96%	18,323,954
Oct 27, 2026	33.69	33.69	31.87	32.01	32.01	-5.01%	6,899,727
Oct 26, 2026	33.94	34.26	33.02	33.70	33.70	-0.65%	4,758,913
Oct 23, 2026	35.22	35.59	33.79	33.92	33.92	-4.32%	7,393,207
Oct 22, 2026	33.98	35.63	33.43	35.45	35.45	7.75%	8,311,933
Oct 21, 2026	32.95	33.29	32.68	32.90	32.90	-0.45%	4,219,253
Oct 20, 2026	32.39	33.31	32.39	33.05	33.05	3.90%	3,966,696
Oct 19, 2026	31.93	32.05	31.39	31.81	31.81	-1.55%	4,436,687
Oct 16, 2026	32.39	32.65	31.59	32.31	32.31	0.97%	5,771,108
Oct 15, 2026	30.59	32.50	30.45	32.00	32.00	6.28%	5,551,817
Oct 14, 2026	29.98	30.21	29.30	30.11	30.11	0.37%	5,379,348
Oct 13, 2026	29.48	30.02	29.11	30.00	30.00	2.70%	7,358,098
Oct 12, 2026	29.67	29.90	29.03	29.21	29.21	-1.55%	2,764,020
Oct 9, 2026	30.02	30.16	29.54	29.67	29.67	-0.47%	4,093,001
Oct 8, 2026	27.60	29.83	27.58	29.81	29.81	8.01%	9,466,478
Oct 7, 2026	27.77	27.87	27.17	27.60	27.60	-0.11%	4,947,680
Oct 6, 2026	27.70	28.20	27.46	27.63	27.63	-0.11%	4,577,389
Oct 5, 2026	27.25	27.68	27.18	27.66	27.66	1.02%	4,934,187
Oct 2, 2026	27.48	27.81	27.15	27.38	27.38	-1.23%	3,741,484
Oct 1, 2026	27.91	28.23	27.10	27.72	27.72	1.17%	4,630,485
Sep 30, 2026	27.03	27.55	26.86	27.40	27.40	1.67%	6,693,127
Sep 29, 2026	26.84	27.18	26.52	26.95	26.95	-0.26%	5,193,571
Sep 28, 2026	27.68	27.75	26.85	27.02	27.02	-3.81%	5,182,922
Sep 25, 2026	27.73	28.63	27.60	28.09	28.09	0.84%	6,662,484
Sep 24, 2026	28.18	28.54	27.28	27.86	27.86	-1.43%	6,497,963
Sep 23, 2026	28.69	28.69	27.89	28.26	28.26	-1.77%	5,671,023
Sep 22, 2026	29.63	29.63	28.31	28.77	28.77	-0.93%	5,284,981
Sep 21, 2026	29.24	29.64	28.84	29.04	29.04	-0.17%	7,100,172
Sep 18, 2026	29.30	29.91	28.96	29.09	29.09	-0.70%	17,117,231
Sep 17, 2026	30.48	30.59	29.24	29.30	29.30	-3.51%	4,863,642
Sep 16, 2026	31.25	31.43	30.27	30.36	30.36	-3.80%	4,667,650
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