UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 27, 2025


COSTAR GROUP, INC.
(Exact name of registrant as specified in its charter)


Delaware	0-24531	52-2091509
(State or other jurisdiction of incorporation or organization)	(Commission File Number)	(I.R.S. Employer Identification No.)

1201 Wilson Blvd.

Arlington,

22209

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (202) 346-6500


Not Applicable
(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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 is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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.

Item 7.01 Regulation FD Disclosure.

On August 27, 2025, CoStar Group, Inc., a Delaware corporation (“CoStar Group” or the “Company”), issued a press release (the “Press Release”) announcing the completion of its acquisition of 100% of the issued capital of Domain Holdings Australia Limited (“Domain”). Pursuant to the binding Scheme Implementation Deed previously disclosed and entered into on May 9, 2025, the Company acquired the remaining approximately 83% of Domain's ordinary shares not previously acquired by CoStar Group by way of Scheme of Arrangement at $4.43 AUD per Domain ordinary share, less $0.088 AUD per share paid as a special dividend declared by Domain and paid on August 19, 2025. A copy of the Press Release is hereby furnished as Exhibit 99.1 to this Current Report.

The information contained in this Item 7.01 and in Exhibit 99.1 of this Current Report shall be considered “furnished” and shall not be

deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended, nor shall it be incorporated by reference to any reports or filings with the Securities and Exchange Commission, whether made before or after the date hereof, except as expressly set forth by specific reference in such a filing.

Item 9.01 Financial Statements and Exhibits.


Exhibit No.			Description
99.1			CoStar Group, Inc. Press Release Dated August 27, 2025.
104			Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


		COSTAR GROUP, INC.

		By: /s/ Christian M. Lown
Date:	August 27, 2025	Name: Christian M. Lown
		Title: Chief Financial Officer

COSTAR GROUP, INC. 8-K