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CoStar Group, Inc. (CSGP) stock

CSGPNasdaqServices-Business Services, NECFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Oct 28, 2026Score 9/3083% above fair value
$30.17+2.03 (+7.21%)

Close on Oct 30, 2026Market cap $12.22BP/E 158.8Yield –

Price history

CoStar share prices for every week, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$30.17
+7.21% on the day
52-week range
$25.89 – $70.76
-57.4% from the high
Change over 52 weeks
-56.7%
From $69.64 on Oct 30, 2025
Average volume
6.82M
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 26, 2026$33.94$34.26$26.86$30.17-11.06%46,731,265
Oct 19, 2026$31.93$35.63$31.39$33.92+4.98%28,327,776
Oct 12, 2026$29.67$32.65$29.03$32.31+8.90%27,221,996
Oct 5, 2026$27.25$30.16$27.17$29.67+8.36%28,025,012
Sep 28, 2026$27.68$28.23$26.52$27.38-2.53%25,441,589
Sep 21, 2026$29.24$29.64$27.28$28.09-3.44%31,216,623
Sep 14, 2026$31.17$31.83$28.96$29.09-4.50%39,167,842
Sep 8, 2026$30.55$30.63$28.79$30.46-1.46%24,013,282
Aug 31, 2026$31.95$32.79$30.32$30.91-4.07%53,186,661
Aug 24, 2026$32.52$33.28$31.29$32.22-0.12%24,513,450
Aug 17, 2026$31.95$33.82$30.99$32.26-0.37%25,974,811
Aug 10, 2026$30.04$33.30$30.04$32.38+7.08%28,442,429
Aug 3, 2026$29.47$31.68$29.26$30.24+5.15%32,483,642
Jul 27, 2026$28.05$31.40$25.89$28.76+3.98%57,571,888
Jul 20, 2026$29.50$29.90$26.77$27.66-7.12%31,569,157
Jul 13, 2026$28.88$31.01$26.68$29.78+4.90%42,721,035
Jul 6, 2026$29.68$30.14$28.09$28.39-5.37%28,696,570
Jun 29, 2026$30.61$30.71$28.18$30.00-0.83%23,500,682
Jun 22, 2026$30.05$31.04$28.54$30.25+0.43%37,278,464
Jun 15, 2026$32.68$34.08$29.53$30.12-8.28%37,637,915
Jun 8, 2026$33.31$34.77$31.63$32.84-3.10%33,290,211
Jun 1, 2026$32.62$34.82$31.70$33.89+5.25%41,034,757
May 26, 2026$33.61$33.71$31.86$32.20-5.15%25,525,843
May 18, 2026$32.73$34.86$32.19$33.95+3.89%31,797,996
May 11, 2026$32.45$33.54$31.36$32.68-0.27%70,659,064
May 4, 2026$35.77$35.86$32.71$32.77-5.62%32,583,950
Apr 27, 2026$36.20$37.39$33.32$34.72-4.72%42,688,115
Apr 20, 2026$39.70$41.03$36.04$36.44-8.26%23,266,808
Apr 13, 2026$36.14$40.94$34.75$39.72+8.88%36,121,978
Apr 6, 2026$39.92$41.29$35.77$36.48-8.69%26,748,151
Mar 30, 2026$40.16$41.63$38.69$39.95+0.45%23,426,547
Mar 23, 2026$43.67$43.75$39.18$39.77-7.30%28,799,129
Mar 16, 2026$43.95$45.21$41.84$42.90-1.67%39,972,154
Mar 9, 2026$48.20$48.93$42.94$43.63-9.82%26,998,578
Mar 2, 2026$43.58$49.03$43.16$48.38+8.40%26,104,938
Feb 23, 2026$49.39$50.07$43.17$44.63-10.51%40,132,578
Feb 17, 2026$44.97$52.08$43.80$49.87+10.85%29,961,124
Feb 9, 2026$49.64$52.35$43.92$44.99-10.52%36,690,735
Feb 2, 2026$61.46$62.67$48.76$50.28-18.24%44,127,029
Jan 26, 2026$65.95$70.57$60.77$61.50-6.25%35,575,045
Jan 20, 2026$64.09$67.79$62.81$65.60+0.40%24,332,055
Jan 12, 2026$58.49$65.93$57.01$65.34+11.71%42,880,893
Jan 5, 2026$65.60$68.98$58.41$58.49-10.96%37,300,228
Dec 29, 2025$67.09$67.96$65.23$65.69-1.97%12,417,141
Dec 22, 2025$65.12$67.27$64.97$67.01+2.73%10,625,123
Dec 15, 2025$68.25$68.25$62.00$65.23-4.40%33,146,069
Dec 8, 2025$67.92$68.58$66.08$68.23+0.32%15,503,470
Dec 1, 2025$67.97$69.30$67.47$68.01-1.15%13,877,014
Nov 24, 2025$67.42$69.36$66.95$68.80+2.30%19,820,778
Nov 17, 2025$68.05$69.02$64.72$67.25-1.18%22,384,273
Nov 10, 2025$67.52$69.29$66.27$68.05+0.78%20,446,225
Nov 3, 2025$67.85$70.63$66.59$67.52-1.87%25,312,652

Seasonality

CSGP return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average3.0%-3.6%1.0%2.0%-0.7%2.6%8.3%0.4%-4.2%-1.2%4.5%-2.7%
Months up6 of 104 of 106 of 106 of 105 of 106 of 109 of 103 of 102 of 103 of 106 of 93 of 9
2026-8.5%-27.4%-9.6%-14.2%-7.0%-12.0%1.6%11.5%-14.6%10.1%
20257.0%-0.5%3.9%-6.4%-0.8%9.3%18.4%-6.0%-5.7%-18.4%-0.0%-2.3%
2024-4.5%4.3%11.0%-5.2%-14.6%-5.2%5.2%-0.9%-2.4%-3.5%11.7%-12.0%
20230.8%-9.3%-2.6%11.8%3.2%12.1%-5.7%-2.4%-6.2%-4.5%13.1%5.2%
2022-11.2%-13.0%9.2%-4.5%-4.2%-0.9%20.2%-4.1%0.0%18.8%-2.0%-4.6%
2021-2.7%-8.4%-0.2%4.0%-0.1%-3.0%7.3%-4.6%1.6%-0.0%-9.6%1.6%
20209.1%2.2%-12.0%10.4%1.3%8.2%19.6%-0.1%-0.0%-2.9%10.6%1.5%
201915.8%17.1%1.9%6.4%2.7%8.7%11.1%-0.1%-3.5%-7.4%11.5%-2.4%
201816.6%-1.1%6.0%1.1%4.0%8.2%0.8%6.3%-4.8%-14.1%2.2%-8.7%
20177.2%0.5%2.0%16.2%8.6%0.8%4.5%4.0%-6.4%10.3%3.1%-2.6%