Company · CIK 0001057352 · SIC 7389 — Services-Business Services, NEC · Nasdaq
COSTAR GROUP, INC. · CSGP
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 7, 2026 SForm 4 → | Aug 10, 4:06 pm EDT | Cynthia Cammett CannChief Accounting Officer | 4,788 | $30.78 | $147,375 | 18,822 | −20.3% | |
| Aug 5, 2026 SForm 4 → | Aug 10, 4:06 pm EDT | John W HillDirector | 3,500 | $30.21 | $105,735 | 22,993 | −13.2% | late |
| Aug 4, 2026 PForm 4 → | Aug 5, 9:27 am EDT | Andrew C FloranceFounder and CEO, Director | 83,300 | $29.89 | $2,489,837 | 1,806,165 | +4.83% | |
| Aug 1, 2026 FForm 4 → | Aug 4, 5:24 pm EDT | Cynthia Cammett CannChief Accounting Officer | 1,077 | $28.76 | $30,975 | 23,610 | — | |
| Aug 1, 2026 FForm 4 → | Aug 4, 5:24 pm EDT | Frederick G. SaintPresident, Marketplaces | 1,436 | $28.76 | $41,299 | 278,415 | — | |
| Jul 1, 2026 FForm 4 → | Jul 6, 4:05 pm EDT | Christian M. LownChief Financial Officer | 5,597 | $29.36 | $164,328 | 129,653 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:14 pm EDT | Rachel C GlaserDirector | 8,262 | — | — | 12,419 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:13 pm EDT | John L BerisfordDirector | 8,262 | — | — | 11,235 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:13 pm EDT | John W HillDirector | 8,262 | — | — | 26,493 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:13 pm EDT | Angelique G. BrunnerDirector | 8,262 | — | — | 18,428 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:13 pm EDT | Robert W MusslewhiteDirector | 8,262 | — | — | 26,539 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:13 pm EDT | Louise S SamsDirector | 8,262 | — | — | 28,671 | — | |
| Jun 23, 2026 AForm 4 → | Jun 24, 9:12 pm EDT | Christine M McCarthyDirector | 8,262 | — | — | 11,585 | — | |
| Jun 15, 2026 FForm 4 → | Jun 16, 5:32 pm EDT | Cynthia Cammett CannChief Accounting Officer | 461 | $32.04 | $14,770 | 24,687 | — |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jul 31, 2026 AForm 4 → | Aug 4, 5:24 pm EDT | Robin Jack RossmannChief Financial Officer | 34,771 | — | — | 34,771 | — | |
| Jul 31, 2026 AForm 4 → | Aug 4, 5:24 pm EDT | Cynthia Cammett CannChief Accounting Officer | 26,078 | — | — | 26,078 | — |