CSGP - CIK 0001057352
COSTAR GROUP, INC. has filed 1,514 documents with the SEC between 1998 and 2026. The most frequent type is insider trade (773 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Passive ownership stake | SC 13G | 2001-02-16 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-12 | - |
| Passive ownership stake | SC 13G | 2001-02-09 | - |
| RW | - | 2000-12-07 | - |
| Quarterly report | 10-Q | 2000-11-14 | 2000-09-30 |
| Major company event | 8-K | 2000-10-26 | 2000-10-25 |
| Major company event | 8-K | 2000-09-26 | 2000-09-26 |
| Employee stock plan | S-8 | 2000-09-14 | - |
| Passive ownership stake (update) | SC 13G/A | 2000-09-08 | - |
| Quarterly report | 10-Q | 2000-08-14 | 2000-06-30 |
| 424B3 | - | 2000-08-11 | - |
| POS EX | - | 2000-08-11 | - |
| 424B3 | - | 2000-08-10 | - |
| S-3/A | - | 2000-08-02 | - |
| Major company event | 8-K | 2000-08-02 | 2000-08-01 |
| Passive ownership stake (update) | SC 13G/A | 2000-07-18 | - |
| Securities registration | S-3 | 2000-06-16 | - |
| Quarterly report | 10-Q | 2000-05-15 | 2000-03-31 |
| Proxy statement | DEF 14A | 2000-04-28 | 2000-06-21 |
| Annual report | 10-K | 2000-03-29 | 1999-12-31 |
| Activist ownership stake (update) | SC 13D/A | 2000-03-10 | - |
| Activist ownership stake (update) | SC 13D/A | 2000-03-10 | - |
| Major company event | 8-K | 2000-02-25 | 2000-02-10 |
| Activist ownership stake (update) | SC 13D/A | 2000-02-23 | - |
| Passive ownership stake | SC 13G | 2000-02-15 | - |
| Passive ownership stake | SC 13G | 2000-02-10 | - |
| Passive ownership stake | SC 13G | 2000-02-09 | - |
| S-4/A | - | 2000-01-05 | - |
| S-4 | - | 1999-12-10 | - |
| Employee stock plan | S-8 | 1999-12-06 | - |
| Major company event | 8-K | 1999-11-17 | 1999-11-03 |
| Quarterly report | 10-Q | 1999-11-15 | 1999-09-30 |
| Activist ownership stake (update) | SC 13D/A | 1999-10-19 | - |
| Major company event | 8-K | 1999-09-24 | 1999-09-15 |
| Quarterly report | 10-Q | 1999-08-11 | 1999-06-30 |
| Employee stock plan | S-8 | 1999-07-09 | - |
| Proxy statement | DEF 14A | 1999-06-16 | 1999-07-13 |
| PRE 14A | - | 1999-06-04 | 1999-07-13 |
| Quarterly report | 10-Q | 1999-05-14 | 1999-03-31 |
| 424B4 | - | 1999-05-05 | - |
| S-1MEF | - | 1999-05-05 | - |
| S-1/A | - | 1999-04-30 | - |
| Activist ownership stake | SC 13D | 1999-04-29 | - |
| Major company event (amended) | 8-K/A | 1999-04-07 | 1999-02-02 |
| Annual report | 10-K | 1999-03-31 | 1998-12-31 |
| Major company event (amended) | 8-K/A | 1999-03-26 | 1999-01-08 |
| IPO registration | S-1 | 1999-03-24 | - |
| Major company event | 8-K | 1999-02-02 | 1999-01-22 |
| Major company event | 8-K | 1999-01-22 | 1999-01-08 |
| Quarterly report | 10-Q | 1998-11-12 | 1998-09-30 |