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 |
|---|---|---|---|
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Material agreement, Results of operations, Regulation FD disclosure
|
Oct 27, 2026 | Oct 27, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 21, 2026 | Aug 21, 2026 |
| S-8 | Employee stock plan registration | Jul 29, 2026 | — |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Jul 28, 2026 | Jul 28, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jul 13, 2026 | Jul 7, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Regulation FD disclosure
|
Jun 25, 2026 | Jun 23, 2026 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
May 29, 2026 | May 28, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 20, 2026 | — |
| DEFA14A | Additional proxy material | May 18, 2026 | — |
| ARS | Annual report to shareholders | Apr 30, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 30, 2026 | — |
| DEF 14A | Proxy statement | Apr 30, 2026 | Jun 23, 2026 |
| 10-Q | Quarterly report | Apr 29, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 28, 2026 | Apr 28, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 16, 2026 | Mar 15, 2026 |
| 10-K | Annual report | Feb 26, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 24, 2026 | Feb 24, 2026 |
| 8-K |
Current report
Officer or director change
|
Feb 13, 2026 | Feb 13, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jan 7, 2026 | Jan 7, 2026 |
| 10-Q | Quarterly report | Oct 29, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 28, 2025 | Oct 28, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 27, 2025 | Aug 27, 2025 |
| S-8 | Employee stock plan registration | Jul 23, 2025 | — |
| 10-Q | Quarterly report | Jul 23, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 22, 2025 | Jul 22, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 27, 2025 | Jun 26, 2025 |
| DEFA14A | Additional proxy material | Jun 13, 2025 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
May 9, 2025 | May 9, 2025 |
| DEFA14A | Additional proxy material | May 1, 2025 | — |
| 10-Q | Quarterly report | May 1, 2025 | Mar 31, 2025 |
| ARS | Annual report to shareholders | Apr 30, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Apr 30, 2025 | Jun 26, 2025 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2025 | Apr 29, 2025 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Apr 7, 2025 | Apr 6, 2025 |
| S-8 | Employee stock plan registration | Feb 28, 2025 | — |
| 8-K |
Current report
Acquisition or sale of assets, Regulation FD disclosure
|
Feb 28, 2025 | Feb 28, 2025 |
| 10-K | Annual report | Feb 20, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 18, 2025 | Feb 18, 2025 |
| 10-Q | Quarterly report | Oct 23, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 22, 2024 | Oct 22, 2024 |
| 10-Q | Quarterly report | Jul 25, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 23, 2024 | Jul 23, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jul 11, 2024 | Jul 8, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 18, 2024 | Jun 18, 2024 |
| EFFECT | Filing | Jun 10, 2024 | — |
| 424B3 | Prospectus | Jun 10, 2024 | — |
| S-4/A | Filing | Jun 10, 2024 | — |
| CORRESP | Letter to the SEC | Jun 7, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 7, 2024 | Jun 6, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
May 31, 2024 | May 24, 2024 |
| UPLOAD | Letter from the SEC | May 30, 2024 | — |
| S-4 | Registration for a merger or exchange | May 21, 2024 | — |
| ARS | Annual report to shareholders | Apr 26, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 26, 2024 | — |
| DEF 14A | Proxy statement | Apr 26, 2024 | Jun 6, 2024 |
| 10-Q | Quarterly report | Apr 24, 2024 | Mar 31, 2024 |
| 425 | Filing | Apr 24, 2024 | — |
| 425 | Filing | Apr 24, 2024 | — |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 23, 2024 | Apr 23, 2024 |
| 425 | Filing | Apr 22, 2024 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Apr 22, 2024 | Apr 21, 2024 |
| 10-K | Annual report | Feb 22, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 21, 2024 | Feb 21, 2024 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Feb 20, 2024 | Feb 20, 2024 |
| 10-Q | Quarterly report | Oct 25, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 24, 2023 | Oct 24, 2023 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 1, 2023 | Jul 28, 2023 |
| 10-Q | Quarterly report | Jul 26, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Jul 25, 2023 | Jul 25, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2023 | Jun 8, 2023 |
| PX14A6G | Filing | May 12, 2023 | — |
| ARS | Annual report to shareholders | Apr 27, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 27, 2023 | — |
| DEF 14A | Proxy statement | Apr 27, 2023 | — |
| 10-Q | Quarterly report | Apr 26, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
Apr 25, 2023 | Apr 25, 2023 |
| 10-K | Annual report | Feb 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2023 | Feb 21, 2023 |
| 10-Q | Quarterly report | Oct 26, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Oct 25, 2022 | Oct 25, 2022 |
| 8-K |
Current report
Other events
|
Sep 20, 2022 | Sep 16, 2022 |
| 424B2 | Prospectus | Sep 19, 2022 | — |
| FWP | Free writing prospectus | Sep 14, 2022 | — |
| 424B2 | Prospectus | Sep 14, 2022 | — |
| 10-Q | Quarterly report | Jul 27, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Jul 26, 2022 | Jul 26, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Jun 9, 2022 | Jun 9, 2022 |
| 8-K |
Current report
Bylaw or fiscal year change
|
May 9, 2022 | Apr 18, 2022 |
| 10-Q | Quarterly report | Apr 28, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
Apr 26, 2022 | Apr 26, 2022 |
| DEFA14A | Additional proxy material | Apr 25, 2022 | — |
| DEF 14A | Proxy statement | Apr 25, 2022 | Jun 9, 2022 |
| 10-K | Annual report | Feb 23, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 22, 2022 | Feb 22, 2022 |
| 10-Q | Quarterly report | Oct 27, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Oct 26, 2021 | Oct 26, 2021 |
| 10-Q | Quarterly report | Jul 28, 2021 | Jun 30, 2021 |
| S-8 | Employee stock plan registration | Jul 28, 2021 | — |
| 8-K |
Current report
Results of operations
|
Jul 27, 2021 | Jul 27, 2021 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results, Other events
|
Jun 7, 2021 | Jun 2, 2021 |
| 10-Q | Quarterly report | Apr 28, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
Apr 27, 2021 | Apr 27, 2021 |
| DEFA14A | Additional proxy material | Apr 26, 2021 | — |
| DEFA14A | Additional proxy material | Apr 19, 2021 | — |
| DEF 14A | Proxy statement | Apr 19, 2021 | Jun 2, 2021 |
| PRE 14A | Preliminary proxy statement | Apr 5, 2021 | Jun 2, 2021 |
| 8-K |
Current report
Other events
|
Mar 5, 2021 | Mar 4, 2021 |
| 425 | Filing | Mar 1, 2021 | — |
| 10-K | Annual report | Feb 24, 2021 | Dec 31, 2020 |
| 425 | Filing | Feb 24, 2021 | — |
| 8-K |
Current report
Results of operations
|
Feb 23, 2021 | Feb 23, 2021 |
| 425 | Filing | Feb 16, 2021 | — |
| 8-K |
Current report
Other events
|
Feb 16, 2021 | Feb 16, 2021 |
| 8-K |
Current report
Agreement ended
|
Jan 4, 2021 | Jan 4, 2021 |
| 10-Q | Quarterly report | Oct 28, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Oct 27, 2020 | Oct 27, 2020 |
| 8-K |
Current report
Officer or director change
|
Oct 1, 2020 | Sep 27, 2020 |
| 10-Q | Quarterly report | Jul 29, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Jul 28, 2020 | Jul 28, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 1, 2020 | Jul 1, 2020 |
| 8-K |
Current report
Other events
|
Jun 24, 2020 | Jun 24, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 5, 2020 | Jun 3, 2020 |
| 8-K |
Current report
Other events
|
May 28, 2020 | May 26, 2020 |
| 424B2 | Prospectus | May 21, 2020 | — |
| 424B2 | Prospectus | May 19, 2020 | — |
| S-3ASR | Automatic shelf registration | May 19, 2020 | — |
| 8-K |
Current report
Material agreement
|
May 14, 2020 | May 13, 2020 |
| 8-K |
Current report
Other events
|
Apr 30, 2020 | Apr 29, 2020 |
| 10-Q | Quarterly report | Apr 29, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
Apr 28, 2020 | Apr 28, 2020 |
| DEFA14A | Additional proxy material | Apr 24, 2020 | — |
| DEF 14A | Proxy statement | Apr 24, 2020 | Jun 3, 2020 |
| 8-K |
Current report
New debt
|
Mar 26, 2020 | Mar 25, 2020 |
| 10-K | Annual report | Feb 26, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 25, 2020 | Feb 25, 2020 |
| 8-K |
Current report
Material agreement
|
Feb 13, 2020 | Feb 11, 2020 |
| 8-K |
Current report
Officer or director change
|
Dec 18, 2019 | Dec 12, 2019 |
| 10-Q | Quarterly report | Oct 23, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations, Other events
|
Oct 22, 2019 | Oct 22, 2019 |
| 8-K |
Current report
Material agreement
|
Oct 2, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 1, 2019 | Sep 30, 2019 |
| 10-Q | Quarterly report | Jul 24, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Jul 23, 2019 | Jul 23, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Jun 6, 2019 | Jun 5, 2019 |
| 10-Q | Quarterly report | Apr 24, 2019 | Mar 31, 2019 |
| DEFA14A | Additional proxy material | Apr 24, 2019 | — |
| DEF 14A | Proxy statement | Apr 24, 2019 | Jun 5, 2019 |
| 8-K |
Current report
Results of operations
|
Apr 23, 2019 | Apr 23, 2019 |
| 10-K | Annual report | Feb 28, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2019 | Feb 26, 2019 |
| 10-Q | Quarterly report | Oct 24, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Oct 23, 2018 | Oct 23, 2018 |
| 10-Q | Quarterly report | Jul 25, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Jul 24, 2018 | Jul 24, 2018 |
| 8-K |
Current report
Shareholder vote results
|
Jun 6, 2018 | Jun 6, 2018 |
| 10-Q | Quarterly report | Apr 25, 2018 | Mar 31, 2018 |
| DEFA14A | Additional proxy material | Apr 24, 2018 | — |
| DEF 14A | Proxy statement | Apr 24, 2018 | Jun 6, 2018 |
| 8-K |
Current report
Results of operations
|
Apr 23, 2018 | Apr 23, 2018 |
| S-8 | Employee stock plan registration | Feb 26, 2018 | — |
| 10-K | Annual report | Feb 23, 2018 | Dec 31, 2017 |
| 8-K |
Current report
Results of operations, Unregistered share sale, Other events
|
Feb 21, 2018 | Feb 21, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 17, 2018 | Jan 17, 2018 |
| 8-K |
Current report
Other events
|
Nov 28, 2017 | Nov 24, 2017 |
| 10-Q | Quarterly report | Oct 26, 2017 | Sep 30, 2017 |
| 8-K |
Current report
Material agreement, Results of operations, New debt, Other events
|
Oct 25, 2017 | Oct 25, 2017 |
| 8-K |
Current report
Other events
|
Oct 3, 2017 | Oct 3, 2017 |
| 424B2 | Prospectus | Sep 29, 2017 | — |
| 424B2 | Prospectus | Sep 25, 2017 | — |
| S-3ASR | Automatic shelf registration | Sep 25, 2017 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Sep 13, 2017 | Sep 12, 2017 |
| 10-Q | Quarterly report | Jul 27, 2017 | Jun 30, 2017 |
| 8-K |
Current report
Results of operations
|
Jul 26, 2017 | Jul 26, 2017 |
| 8-K |
Current report
Shareholder vote results
|
Jun 7, 2017 | Jun 6, 2017 |
| 10-Q | Quarterly report | Apr 27, 2017 | Mar 31, 2017 |
| 8-K |
Current report
Results of operations
|
Apr 27, 2017 | Apr 26, 2017 |
| DEFA14A | Additional proxy material | Apr 24, 2017 | — |
| DEF 14A | Proxy statement | Apr 24, 2017 | Jun 6, 2017 |
| 10-K | Annual report | Feb 24, 2017 | Dec 31, 2016 |
| 8-K |
Current report
Results of operations
|
Feb 22, 2017 | Feb 22, 2017 |
| 10-Q | Quarterly report | Oct 27, 2016 | Sep 30, 2016 |
| 8-K |
Current report
Results of operations
|
Oct 27, 2016 | Oct 26, 2016 |
| 10-Q | Quarterly report | Jul 28, 2016 | Jun 30, 2016 |
| 8-K |
Current report
Results of operations
|
Jul 27, 2016 | Jul 27, 2016 |
| S-8 | Employee stock plan registration | Jun 28, 2016 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 9, 2016 | Jun 9, 2016 |
| 10-Q | Quarterly report | Apr 28, 2016 | Mar 31, 2016 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Apr 27, 2016 | Apr 27, 2016 |
| DEFA14A | Additional proxy material | Apr 26, 2016 | — |
| DEF 14A | Proxy statement | Apr 26, 2016 | Jun 9, 2016 |
| 10-K | Annual report | Feb 26, 2016 | Dec 31, 2015 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2016 | Feb 24, 2016 |
| 8-K |
Current report
Officer or director change
|
Nov 19, 2015 | Nov 19, 2015 |
| 10-Q | Quarterly report | Oct 29, 2015 | Sep 30, 2015 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2015 | Oct 28, 2015 |
| UPLOAD | Letter from the SEC | Sep 30, 2015 | — |
| S-8 | Employee stock plan registration | Sep 14, 2015 | — |
| 10-Q | Quarterly report | Jul 30, 2015 | Jun 30, 2015 |
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.