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COSTAR GROUP, INC.

For the period ended Mar 31, 2026. Filed Apr 29, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed Apr 29, 2026

CSGP$31.24+2.3%Stored close · as of Nov 9, 2026

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Item 6. Exhibits

Exhibit No.Description
3.1Fourth 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).
3.2Fourth 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).
*10.1CoStar 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).
*10.2CoStar 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).
*10.3Second 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).
31.1Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith).
31.2Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith).
32.1Certification 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).
32.2Certification 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.INSThe 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.SCHInline XBRL Taxonomy Extension Schema Document.
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document.
101.LABInline XBRL Taxonomy Extension Label Linkbase Document.
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document.
104The 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.
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.