CoStar Group Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
May 15, 2026	31.92	33.02	31.92	32.68	32.68	2.61%	37,834,033
May 14, 2026	31.97	32.58	31.36	31.85	31.85	-0.38%	7,866,867
May 13, 2026	32.41	32.88	31.78	31.97	31.97	-3.27%	8,482,366
May 12, 2026	33.21	33.54	32.21	33.05	33.05	0.39%	8,261,063
May 11, 2026	32.45	33.19	32.09	32.92	32.92	0.46%	8,214,738
May 8, 2026	34.62	34.64	32.71	32.77	32.77	-6.32%	7,105,832
May 7, 2026	34.08	35.59	33.94	34.98	34.98	2.67%	7,712,372
May 6, 2026	34.95	35.26	34.03	34.07	34.07	-2.38%	5,465,988
May 5, 2026	35.23	35.37	33.82	34.90	34.90	-1.36%	5,587,221
May 4, 2026	35.77	35.86	34.69	35.38	35.38	1.90%	6,712,537
May 1, 2026	35.28	36.09	34.35	34.72	34.72	0.32%	6,367,853
Apr 30, 2026	33.76	34.75	33.33	34.61	34.61	1.38%	7,908,176
Apr 29, 2026	35.65	36.53	33.32	34.14	34.14	-5.06%	15,388,135
Apr 28, 2026	36.85	37.39	35.88	35.96	35.96	-0.77%	7,354,880
Apr 27, 2026	36.20	36.98	36.08	36.24	36.24	-0.55%	5,669,066
Apr 24, 2026	37.30	37.49	36.04	36.44	36.44	-2.51%	4,343,258
Apr 23, 2026	38.48	38.70	36.56	37.38	37.38	-3.59%	6,626,643
Apr 22, 2026	39.13	39.62	37.77	38.77	38.77	-0.36%	4,509,745
Apr 21, 2026	40.16	41.03	38.77	38.91	38.91	-2.87%	4,004,298
Apr 20, 2026	39.70	40.32	39.36	40.06	40.06	0.86%	3,782,864
Apr 17, 2026	40.58	40.94	39.52	39.72	39.72	-0.80%	3,994,095
Apr 16, 2026	39.77	40.41	39.57	40.04	40.04	1.86%	6,694,113
Apr 15, 2026	38.05	39.52	37.64	39.31	39.31	4.55%	6,507,525
Apr 14, 2026	36.81	38.35	36.81	37.60	37.60	1.46%	7,372,275
Apr 13, 2026	36.14	37.26	34.75	37.06	37.06	1.59%	11,553,967
Apr 10, 2026	37.30	37.50	35.77	36.48	36.48	-2.25%	5,175,738
Apr 9, 2026	38.28	38.44	36.91	37.32	37.32	-3.86%	5,767,003
Apr 8, 2026	40.73	41.13	38.48	38.82	38.82	-1.67%	6,050,958
Apr 7, 2026	41.11	41.25	39.44	39.48	39.48	-4.12%	4,277,357
Apr 6, 2026	39.92	41.29	39.64	41.18	41.18	3.07%	5,477,095
Apr 2, 2026	39.65	40.84	38.70	39.95	39.95	0.81%	5,798,078
Apr 1, 2026	40.34	40.34	38.69	39.63	39.63	-1.76%	5,478,429
Mar 31, 2026	41.50	41.63	39.57	40.34	40.34	-1.32%	5,482,177
Mar 30, 2026	40.16	41.07	40.04	40.88	40.88	2.79%	6,667,863
Mar 27, 2026	41.07	41.43	39.18	39.77	39.77	-3.70%	6,295,307
Mar 26, 2026	40.95	42.71	40.95	41.30	41.30	-0.27%	4,984,292
Mar 25, 2026	41.84	42.12	40.33	41.41	41.41	-0.12%	5,753,119
Mar 24, 2026	42.32	42.52	40.78	41.46	41.46	-3.38%	4,557,034
Mar 23, 2026	43.67	43.75	41.79	42.91	42.91	0.02%	7,209,377
Mar 20, 2026	42.24	43.27	41.96	42.90	42.90	0.19%	15,183,228
Mar 19, 2026	42.73	43.57	41.84	42.82	42.82	-0.67%	6,127,139
Mar 18, 2026	43.53	44.13	42.65	43.11	43.11	-2.58%	8,457,747
Mar 17, 2026	44.07	45.21	43.62	44.25	44.25	1.44%	4,299,039
Mar 16, 2026	43.95	44.10	43.45	43.62	43.62	-0.02%	5,904,999
Mar 13, 2026	43.71	44.27	42.94	43.63	43.63	0.62%	5,270,621
Mar 12, 2026	45.01	46.34	43.29	43.36	43.36	-4.37%	6,289,529
Mar 11, 2026	46.46	47.15	44.83	45.34	45.34	-2.14%	5,274,605
Mar 10, 2026	47.73	48.32	45.50	46.33	46.33	-4.32%	4,530,916
Mar 9, 2026	48.20	48.93	47.62	48.42	48.42	0.08%	5,632,907
Mar 6, 2026	48.36	48.74	47.64	48.38	48.38	-1.08%	3,959,580