CSGP

Costar Group, Inc.

Company with tickers: CSGP

CIK

1057352

CUSIP

22160N109

Shares Outstanding

408,355,715

13F Activity (30d)

390 filings 378 filers

Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start	ATS Volume	Non-ATS OTC Volume	Total Off-Exchange	% of FINRA Weekly Volume
2026-05-18	8,561,224	5,476,539	14,037,763	58.7%
2026-05-11	12,006,163	17,449,145	29,455,308	91.7%

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