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Item 6. Exhibits

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Item 6. Exhibits


Exhibit No.						Description

3.1						Fourth Amended and Restated Certificate of Incorporation (Incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K filed with the SEC on June 7, 2021).
3.2						Fourth Amended and Restated By-Laws (Incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K filed with the SEC on May 9, 2022).
*10.1						CoStar Group, Inc. Executive Severance Plan, dated as of January 6, 2026 (Incorporated by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed with the SEC on January 7, 2026).
*10.2						CoStar Group, Inc. Amended Executive Severance Plan, dated as of February 13, 2026 (Incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the SEC on February 13, 2026).
*10.3						Second Amendment, dated January 6, 2026, to the Employment Agreement between CoStar Realty Information, Inc. and Andrew C. Florance (Incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the SEC on January 7, 2026).
31.1						Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith).
31.2						Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith).
32.1						Certification of Principal Executive Officer pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith).
32.2						Certification of Principal Financial Officer pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith).
101.INS						The following financial statements from the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2026, formatted in Inline XBRL: (i) Condensed Consolidated Statements of Operations; (ii) Condensed Consolidated Statements of Comprehensive Income; (iii) Condensed Consolidated Balance Sheets; (iv) Condensed Consolidated Statements of Changes in Stockholders’ Equity; (v) Condensed Consolidated Statements of Cash Flows; and (vi) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text and including detailed tags.
101.SCH						Inline XBRL Taxonomy Extension Schema Document.
101.CAL						Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF						Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB						Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE						Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104						The cover page from the Registrant's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2026, formatted in Inline XBRL (included as Exhibit 101).

Management Contract or Compensatory Plan or Arrangement.

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 thereunto duly authorized.


						COSTAR GROUP, INC.
Date:			April 29, 2026			By:						/s/ Christian M. Lown
												Christian M. Lown Chief Financial Officer (Principal Financial Officer and Duly Authorized Officer)

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