Costar Group, Inc. SEC filings CSGP
Costar Group, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to Jun 7, 2011. Its latest annual report, Form ARS, was filed on Apr 30, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (material agreement, results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Oct 16, 2026 | Oct 15, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| 4 | Insider transaction | Aug 10, 2026 | Aug 7, 2026 |
| 4 | Insider transaction | Aug 10, 2026 | Aug 5, 2026 |
| 144 | Notice of proposed sale | Aug 5, 2026 | — |
| 4 | Insider transaction | Aug 5, 2026 | Aug 4, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Jul 31, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Jul 31, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Aug 1, 2026 |
| 3 | Initial insider ownership | Aug 4, 2026 | Jul 31, 2026 |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 3/A | Form 3/a | Apr 2, 2026 | Mar 25, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4/A | Form 4/a | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 3 | Initial insider ownership | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 15, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 11, 2026 | Mar 10, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 3, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Nov 17, 2025 | Nov 13, 2025 |
| 4 | Insider transaction | Nov 17, 2025 | Nov 13, 2025 |
| 144 | Notice of proposed sale | Nov 13, 2025 | — |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 11, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Aug 28, 2025 |
| 144 | Notice of proposed sale | Aug 28, 2025 | — |
| 4 | Insider transaction | Aug 5, 2025 | Aug 1, 2025 |
| 4 | Insider transaction | Aug 5, 2025 | Aug 1, 2025 |
| 4 | Insider transaction | Jul 29, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 29, 2025 | Jul 28, 2025 |
| 144 | Notice of proposed sale | Jul 28, 2025 | — |
| 4 | Insider transaction | Jul 2, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jun 17, 2025 | Jun 15, 2025 |
| 4 | Insider transaction | Jun 12, 2025 | Jun 11, 2025 |
| 144 | Notice of proposed sale | Jun 11, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 144 | Notice of proposed sale | May 12, 2025 | — |
| 144 | Notice of proposed sale | May 9, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 23, 2025 | — |
| 3 | Initial insider ownership | Apr 14, 2025 | Apr 6, 2025 |
| 3 | Initial insider ownership | Apr 14, 2025 | Apr 6, 2025 |
| 3 | Initial insider ownership | Apr 14, 2025 | Apr 6, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 15, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Jul 31, 2024 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Mar 1, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Mar 1, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Mar 1, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Mar 1, 2025 |
| 4 | Insider transaction | Feb 24, 2025 | Feb 20, 2025 |
| 4 | Insider transaction | Feb 24, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 24, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 24, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 24, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Dec 12, 2024 | Dec 10, 2024 |
| 4 | Insider transaction | Dec 12, 2024 | Dec 10, 2024 |
| 144 | Notice of proposed sale | Dec 10, 2024 | — |
| 4 | Insider transaction | Dec 2, 2024 | Nov 27, 2024 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 26, 2024 |
| 144 | Notice of proposed sale | Nov 27, 2024 | — |
| 144 | Notice of proposed sale | Nov 26, 2024 | — |
| 4 | Insider transaction | Oct 28, 2024 | Oct 25, 2024 |
| 4 | Insider transaction | Oct 28, 2024 | Oct 25, 2024 |
| 144 | Notice of proposed sale | Oct 25, 2024 | — |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4/A | Form 4/a | Aug 5, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Aug 5, 2024 | Jul 17, 2024 |
| 4 | Insider transaction | Aug 1, 2024 | Jul 30, 2024 |
| 4 | Insider transaction | Jul 30, 2024 | Jul 26, 2024 |
| 4 | Insider transaction | Jul 30, 2024 | Jul 26, 2024 |
| 4 | Insider transaction | Jul 30, 2024 | Jul 27, 2024 |
| 144 | Notice of proposed sale | Jul 30, 2024 | — |
| 3 | Initial insider ownership | Jul 18, 2024 | Jul 8, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 3 | Initial insider ownership | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jun 4, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 16, 2024 |
| 144 | Notice of proposed sale | May 16, 2024 | — |
| 4 | Insider transaction | May 10, 2024 | May 9, 2024 |
| 144 | Notice of proposed sale | May 9, 2024 | — |
| 4 | Insider transaction | May 9, 2024 | May 7, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 26, 2024 |
| 144 | Notice of proposed sale | Apr 26, 2024 | — |
| 144 | Notice of proposed sale | Apr 26, 2024 | — |
| 4 | Insider transaction | Mar 19, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 19, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 19, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 19, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 19, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 14, 2024 | Mar 12, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 5, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 25, 2024 | — |
| 4 | Insider transaction | Dec 1, 2023 | Nov 29, 2023 |
| 4 | Insider transaction | Nov 29, 2023 | Nov 28, 2023 |
| 144 | Notice of proposed sale | Nov 28, 2023 | — |
| 4 | Insider transaction | Nov 9, 2023 | Nov 8, 2023 |
| 144 | Notice of proposed sale | Nov 8, 2023 | — |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Nov 1, 2023 | Oct 30, 2023 |
| 4 | Insider transaction | Oct 2, 2023 | Oct 1, 2023 |
| 3 | Initial insider ownership | Aug 2, 2023 | Aug 1, 2023 |
| 144 | Notice of proposed sale | Jun 30, 2023 | — |
| 4 | Insider transaction | Jun 30, 2023 | Jun 28, 2023 |
| 4 | Insider transaction | Jun 30, 2023 | Jun 30, 2023 |
| 144 | Notice of proposed sale | Jun 28, 2023 | — |
| 4 | Insider transaction | Jun 28, 2023 | Jun 27, 2023 |
| 4 | Insider transaction | Jun 28, 2023 | Jun 26, 2023 |
| 144 | Notice of proposed sale | Jun 27, 2023 | — |
| 144 | Notice of proposed sale | Jun 23, 2023 | — |
| 4 | Insider transaction | Jun 14, 2023 | Jun 12, 2023 |
| 144 | Notice of proposed sale | Jun 12, 2023 | — |
| 4 | Insider transaction | Jun 9, 2023 | Jun 7, 2023 |
| 144 | Notice of proposed sale | Jun 7, 2023 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Business Services, NEC (SIC 7389)
- Listed as
- CSGP (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Arlington, VA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1057352
- Former names
- COSTAR GROUP, INC. (until Oct 28, 2026); COSTAR GROUP INC (until Jun 25, 2019); REALTY INFORMATION GROUP INC (until May 5, 1999)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.