Filings with the SEC since Jun 3, 2011
1,004 filings, 5 in the last 30 days
Latest current reportOpen ↗
Oct 27, 2026
8-K: Material agreement signed, Quarterly results, Regulation FD disclosure
Filed in the last 30 days
5
of 1,004 in all
Annual report (10-K)Quarterly report (10-Q)Current report (8-K)Auditor changeCEO, CFO, COO or CAO changeRestatementLate filing noticeInsider purchaseCluster buy (3+ insiders)SEC comment letterShare offering (S-3, 424B)
All 17 events
- Oct 28, 202610-Q Quarterly report (10-Q) period ended Sep 30, 2026
- Oct 27, 20268-K Material agreement signed, Quarterly results, Regulation FD disclosure 8-K items 1.01, 2.02, 7.01
- Aug 21, 20268-K Regulation FD disclosure 8-K item 7.01
- Aug 5, 2026Buy FLORANCE ANDREW C (Founder and CEO) bought $2.5M open-market purchase on Aug 4, 2026
- Jul 29, 202610-Q Quarterly report (10-Q) period ended Jun 30, 2026
- Jul 28, 20268-K Quarterly results 8-K item 2.02
- Jul 13, 2026Officer CFO change (the “Company” or “CoStar Group”) appointed Robin Rossmann to serve as the Company’s Chief Financial Officer, effective July 31, 2026 (“Effective Date”).
- Jun 25, 20268-K Director or officer change, Shareholder vote results, Regulation FD disclosure 8-K items 5.02, 5.07, 7.01
- May 29, 20268-K Material agreement signed, Regulation FD disclosure 8-K items 1.01, 7.01
- May 4, 2026Buy FLORANCE ANDREW C (President and CEO) bought $2.5M open-market purchase on May 1, 2026
- Apr 29, 202610-Q Quarterly report (10-Q) period ended Mar 31, 2026
- Apr 28, 20268-K Quarterly results, Regulation FD disclosure 8-K items 2.02, 7.01
- Mar 16, 20268-K Director or officer change, Regulation FD disclosure 8-K items 5.02, 7.01
- Feb 26, 202610-K Annual report (10-K) period ended Dec 31, 2025
- Feb 24, 20268-K Quarterly results, Regulation FD disclosure 8-K items 2.02, 7.01
- Feb 13, 20268-K Director or officer change 8-K item 5.02
- Jan 7, 20268-K Director or officer change, Regulation FD disclosure 8-K items 5.02, 7.01
From the SEC filing index. Insider purchases go back 180 days (the Form 4s downloaded).
Every filing
Newest first, by kind
All 1004
Annual & quarterly 62Current reports (8-K) 137Insiders 616Proxy & votes 37Big owners (13D/13G) 80Shares & debt offered 23SEC letters 19Other 30
| Filed | Form | What it is | Period | |
|---|---|---|---|---|
| Nov 10, 2026 | 4 | Insider trade | Nov 9, 2026 | all files |
| Nov 10, 2026 | 3 | New insider | Nov 9, 2026 | all files |
| Oct 28, 2026 | 10-Q | Quarterly report | Sep 30, 2026 | all files · tables |
| Oct 27, 2026 | 8-K | Material agreement signed, Quarterly results, Regulation FD disclosure | Oct 27, 2026 | all files |
| Oct 16, 2026 | 4 | Insider trade | Oct 15, 2026 | all files |
| Aug 21, 2026 | 8-K | Regulation FD disclosure | Aug 21, 2026 | all files |
| Aug 14, 2026 | SCHEDULE 13G | 5%+ owner (passive) | all files | |
| Aug 10, 2026 | 4 | Insider trade | Aug 7, 2026 | all files |
| Aug 10, 2026 | 4 | Insider trade | Aug 5, 2026 | all files |
| Aug 5, 2026 | 144 | Notice of planned insider sale | all files | |
| Aug 5, 2026 | 4 | Insider trade | Aug 4, 2026 | all files |
| Aug 4, 2026 | 4 | Insider trade | Jul 31, 2026 | all files |
| Aug 4, 2026 | 3 | New insider | Jul 31, 2026 | all files |
| Aug 4, 2026 | 4 | Insider trade | Aug 1, 2026 | all files |
| Aug 4, 2026 | 4 | Insider trade | Jul 31, 2026 | all files |
| Jul 29, 2026 | S-8 | Shares registered for employee plans | all files | |
| Jul 29, 2026 | 10-Q | Quarterly report | Jun 30, 2026 | all files · tables |
| Jul 28, 2026 | 8-K | Quarterly results | Jul 28, 2026 | all files |
| Jul 13, 2026 | 8-K | Director or officer change, Regulation FD disclosure | Jul 7, 2026 | all files |
| Jul 6, 2026 | 4 | Insider trade | Jul 1, 2026 | all files |
| Jun 25, 2026 | 8-K | Director or officer change, Shareholder vote results, Regulation FD disclosure | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 24, 2026 | 4 | Insider trade | Jun 23, 2026 | all files |
| Jun 16, 2026 | 4 | Insider trade | Jun 15, 2026 | all files |
| May 29, 2026 | 8-K | Material agreement signed, Regulation FD disclosure | May 28, 2026 | all files |
| May 20, 2026 | SD | Conflict minerals report | all files | |
| May 18, 2026 | DEFA14A | Extra proxy material | all files | |
| May 4, 2026 | 4 | Insider trade | May 1, 2026 | all files |
| Apr 30, 2026 | ARS | Annual report to shareholders | Dec 31, 2025 | all files |
| Apr 30, 2026 | DEFA14A | Extra proxy material | all files | |
| Apr 30, 2026 | DEF 14A | Proxy statement | Jun 23, 2026 | all files |
| Apr 29, 2026 | SCHEDULE 13G | 5%+ owner (passive) | all files | |
| Apr 29, 2026 | SCHEDULE 13G | 5%+ owner (passive) | all files | |
| Apr 29, 2026 | 10-Q | Quarterly report | Mar 31, 2026 | all files · tables |
| Apr 28, 2026 | 8-K | Quarterly results, Regulation FD disclosure | Apr 28, 2026 | all files |
| Apr 2, 2026 | 3/A | New insider (amended) | Mar 25, 2025 | all files |
| Mar 26, 2026 | SCHEDULE 13G/A | 5%+ owner (passive), amended | all files | |
| Mar 17, 2026 | 4 | Insider trade | Mar 15, 2026 | all files |
| Mar 17, 2026 | 4 | Insider trade | Mar 15, 2026 | all files |
| Mar 17, 2026 | 4/A | Insider trade (amended) | Mar 15, 2026 | all files |
| Mar 17, 2026 | 4 | Insider trade | Mar 15, 2026 | all files |
| Mar 17, 2026 | 4 | Insider trade | Mar 15, 2026 | all files |
| Mar 17, 2026 | 3 | New insider | Mar 15, 2026 | all files |
| Mar 17, 2026 | 4 | Insider trade | Mar 15, 2026 | all files |
| Mar 16, 2026 | 8-K | Director or officer change, Regulation FD disclosure | Mar 15, 2026 | all files |
| Mar 11, 2026 | 4 | Insider trade | Mar 10, 2026 | all files |
| Mar 11, 2026 | 4 | Insider trade | Mar 10, 2026 | all files |
| Mar 11, 2026 | 4 | Insider trade | Mar 10, 2026 | all files |
| Mar 11, 2026 | 4 | Insider trade | Mar 10, 2026 | all files |
| Mar 11, 2026 | 4 | Insider trade | Mar 10, 2026 | all files |
| Mar 9, 2026 | 4 | Insider trade | Mar 6, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Mar 1, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Mar 2, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 3, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Mar 2, 2026 | 4 | Insider trade | Feb 27, 2026 | all files |
| Feb 26, 2026 | 10-K | Annual report | Dec 31, 2025 | all files · tables |
| Feb 24, 2026 | 8-K | Quarterly results, Regulation FD disclosure | Feb 24, 2026 | all files |
| Feb 23, 2026 | 4 | Insider trade | Feb 19, 2026 | all files |
| Feb 23, 2026 | 4 | Insider trade | Feb 19, 2026 | all files |
| Feb 23, 2026 | 4 | Insider trade | Feb 19, 2026 | all files |
| Feb 23, 2026 | 4 | Insider trade | Feb 19, 2026 | all files |
| Feb 18, 2026 | 4 | Insider trade | Feb 15, 2026 | all files |
| Feb 18, 2026 | 4 | Insider trade | Feb 15, 2026 | all files |
| Feb 18, 2026 | 4 | Insider trade | Feb 15, 2026 | all files |
| Feb 18, 2026 | 4 | Insider trade | Feb 15, 2026 | all files |
| Feb 13, 2026 | 8-K | Director or officer change | Feb 13, 2026 | all files |
| Jan 7, 2026 | 8-K | Director or officer change, Regulation FD disclosure | Jan 7, 2026 | all files |
| Nov 17, 2025 | 4 | Insider trade | Nov 13, 2025 | all files |
| Nov 17, 2025 | 4 | Insider trade | Nov 13, 2025 | all files |
| Nov 13, 2025 | 144 | Notice of planned insider sale | all files | |
| Oct 29, 2025 | 10-Q | Quarterly report | Sep 30, 2025 | all files · tables |
| Oct 28, 2025 | 8-K | Quarterly results, Regulation FD disclosure | Oct 28, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 11, 2025 | 4 | Insider trade | Sep 9, 2025 | all files |
| Sep 2, 2025 | 4 | Insider trade | Aug 28, 2025 | all files |
| Aug 28, 2025 | 144 | Notice of planned insider sale | all files | |
| Aug 27, 2025 | 8-K | Regulation FD disclosure | Aug 27, 2025 | all files |
| Aug 5, 2025 | 4 | Insider trade | Aug 1, 2025 | all files |
| Aug 5, 2025 | 4 | Insider trade | Aug 1, 2025 | all files |
| Jul 29, 2025 | 4 | Insider trade | Jul 28, 2025 | all files |
| Jul 29, 2025 | 4 | Insider trade | Jul 28, 2025 | all files |
| Jul 28, 2025 | 144 | Notice of planned insider sale | all files | |
| Jul 23, 2025 | S-8 | Shares registered for employee plans | all files |
Show the other 75 filings on this page
Press releases with quarterly results are attached to the 8-Ks marked "Quarterly results"; read them on Earnings releases.