COSTAR GROUP, INC.
For the period ended Sep 30, 2026. Filed Oct 28, 2026.
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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.
Sep 30, 2026 · Filed Oct 28, 2026
CSGP$31.24+2.3%Stored close · as of Nov 9, 2026
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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 | Employment Letter by and between CoStar Group, Inc. and Robin Rossmann dated July 12, 2026 (filed herewith). |
| 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 September 30, 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 September 30, 2026, formatted in Inline XBRL (included as Exhibit 101). |
- Management Contract or Compensatory Plan or Arrangement.
Certain personal information in this exhibit has been omitted in accordance with Item 601(a)(6) of Regulation S-K.
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.