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 |
|---|---|---|---|
| S-8 | Employee stock plan registration | Jul 29, 2026 | — |
| S-8 | Employee stock plan registration | Jul 23, 2025 | — |
| S-8 | Employee stock plan registration | Feb 28, 2025 | — |
| 424B3 | Prospectus | Jun 10, 2024 | — |
| S-4/A | Filing | Jun 10, 2024 | — |
| S-4 | Registration for a merger or exchange | May 21, 2024 | — |
| 424B2 | Prospectus | Sep 19, 2022 | — |
| FWP | Free writing prospectus | Sep 14, 2022 | — |
| 424B2 | Prospectus | Sep 14, 2022 | — |
| S-8 | Employee stock plan registration | Jul 28, 2021 | — |
| 424B2 | Prospectus | May 21, 2020 | — |
| 424B2 | Prospectus | May 19, 2020 | — |
| S-3ASR | Automatic shelf registration | May 19, 2020 | — |
| S-8 | Employee stock plan registration | Feb 26, 2018 | — |
| 424B2 | Prospectus | Sep 29, 2017 | — |
| 424B2 | Prospectus | Sep 25, 2017 | — |
| S-3ASR | Automatic shelf registration | Sep 25, 2017 | — |
| S-8 | Employee stock plan registration | Jun 28, 2016 | — |
| S-8 | Employee stock plan registration | Sep 14, 2015 | — |
| 424B2 | Prospectus | Jun 6, 2014 | — |
| 424B2 | Prospectus | Jun 2, 2014 | — |
| S-3ASR | Automatic shelf registration | Jun 2, 2014 | — |
| S-8 | Employee stock plan registration | Jun 27, 2012 | — |
| 424B3 | Prospectus | Jun 7, 2011 | — |
Showing 24 filings. 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.