csgp-20260331

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q


☒			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2026


☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______ to ______

Commission file number 0-24531

CoStar Group, Inc.

(Exact name of registrant as specified in its charter)


Delaware						52-2091509
(State or other jurisdiction of incorporation or organization)						(I.R.S. Employer Identification No.)


1201 Wilson Blvd
Arlington	VA	22209

(Address of principal executive offices) (Zip Code)

(202) 346-6500

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock ($0.01 par value)	CSGP	Nasdaq Global Select Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.


Large accelerated filer	x	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No x

As of April 27, 2026, there were 408,355,715 shares of the registrant’s common stock outstanding.

COSTAR GROUP, INC.

FORM 10-Q

TABLE OF CONTENTS


	Glossary of Terms	3

PART I	FINANCIAL INFORMATION

Item 1.	Financial Statements	6

	Condensed Consolidated Statements of Operations	6

	Condensed Consolidated Statements of Comprehensive Income (Loss)	7

	Condensed Consolidated Balance Sheets	8

	Condensed Consolidated Statements of Changes in Stockholders’ Equity	9

	Condensed Consolidated Statements of Cash Flows	11

	Notes to Condensed Consolidated Financial Statements	12

Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	40

Item 3.	Quantitative and Qualitative Disclosures About Market Risk	54

Item 4.	Controls and Procedures	55

PART II	OTHER INFORMATION

Item 1.	Legal Proceedings	56

Item 1A.	Risk Factors	56

Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	56

Item 3.	Defaults Upon Senior Securities	56

Item 4.	Mine Safety Disclosures	56

Item 5.	Other Information	56

Item 6.

SEC Form 10-Q filed by CoStar Group Inc.