Insider holders · CIK 0001057352
COSTAR GROUP, INC. · CSGP
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Andrew C FloranceFounder and CEO | 1,806,165 | — | 1,806,165 | Aug 5, 2026 · 9:27 am EDT | Form 4 |
| Frederick G. SaintPresident, Marketplaces | 278,415 | — | 278,415 | Aug 4, 2026 · 5:24 pm EDT | Form 4 |
| Michael R KleinDirector | 265,196 | — | 265,196 | Sep 24, 2018 · 4:31 pm EDT | Form 4 |
| Christian M. LownChief Financial Officer | 129,653 | — | 129,653 | Jul 6, 2026 · 4:05 pm EDT | Form 4 |
| Warren H HaberDirector | 121,049 | — | 121,049 | Sep 24, 2018 · 4:28 pm EDT | Form 4 |
| Robin Jack RossmannChief Financial Officer | 86,691 | — | 86,691 | Aug 4, 2026 · 5:22 pm EDT | Form 3 |
| Brian J RadeckiChief Financial Officer | 41,473 | — | 41,473 | Mar 13, 2015 · 5:07 pm EDT | Form 4 |
| Scott T WheelerChief Financial Officer | 30,302 | — | 30,302 | Mar 4, 2019 · 6:19 pm EST | Form 4 |
| Louise S SamsDirector | 28,671 | — | 28,671 | Jun 24, 2026 · 9:13 pm EDT | Form 4 |
| Robert W MusslewhiteDirector | 26,539 | — | 26,539 | Jun 24, 2026 · 9:13 pm EDT | Form 4 |
| Christopher J NassettaDirector | 26,456 | — | 26,456 | Oct 30, 2018 · 5:51 pm EDT | Form 4 |
| Matthew LinningtonExecutive VP, Sales | 24,471 | — | 24,471 | Mar 12, 2019 · 6:06 pm EDT | Form 4 |
| John W HillDirector | 22,993 | — | 22,993 | Aug 10, 2026 · 4:06 pm EDT | Form 4 |
| Cynthia Cammett CannChief Accounting Officer | 18,822 | — | 18,822 | Aug 10, 2026 · 4:06 pm EDT | Form 4 |
| Angelique G. BrunnerDirector | 18,428 | — | 18,428 | Jun 24, 2026 · 9:13 pm EDT | Form 4 |
| Lisa RugglesSenior VP, Global Research | 14,009 | — | 14,009 | Mar 4, 2019 · 6:22 pm EST | Form 4 |
| Rachel C GlaserDirector | 12,419 | — | 12,419 | Jun 24, 2026 · 9:14 pm EDT | Form 4 |
| Christine M McCarthyDirector | 11,585 | — | 11,585 | Jun 24, 2026 · 9:12 pm EDT | Form 4 |
| John L BerisfordDirector | 11,235 | — | 11,235 | Jun 24, 2026 · 9:13 pm EDT | Form 4 |
| Michael J GlossermanDirector | 9,338 | — | 9,338 | Sep 24, 2018 · 4:33 pm EDT | Form 4 |
| David Jay SteinbergDirector | 6,988 | — | 6,988 | Sep 24, 2018 · 4:26 pm EDT | Form 4 |
| Francis CarchediExecutive VP, Corp. Dev. | 6,540 | — | 6,540 | Oct 2, 2018 · 4:17 pm EDT | Form 4 |
| Scott L YingerInterim CFO | 4,583 | — | 4,583 | Aug 11, 2015 · 5:23 pm EDT | Form 3 |
| Laura Cox KaplanDirector | 1,944 | — | 1,944 | Sep 24, 2018 · 4:35 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.