Costar Group, Inc.
A maker of online real estate marketplaces and data tools, CoStar Group runs well-known sites like CoStar, LoopNet, Apartments.com, Homes.com, and Matterport, which agents, brokers, and property managers use to list, find, and tour properties. Founder Andy Florance started the business in 1987 in the Washington, D.C. area after realizing commercial real estate had almost no organized data compared to stock markets. A fun quirk: the name is a mashup of "computerized" and "star," and the firm grew through big acquisitions like Matterport and the British site OnTheMarket.
Granted 7.8K · Sold 71.6K
Granted 1.02M · Bought 141.9K
Granted 144.0K · Sold 122.7K
Granted 7.8K · Sold 3.2K
Granted 257.1K
Granted 179.5K · Bought 20.0K · Sold 77.5K
Granted 123.0K · Sold 20.0K
Granted 109.9K
Granted 3.9K
Granted 88.2K
Granted 69.4K · Sold 9.3K
Granted 18.8K · Bought 1.0K
Granted 18.2K
Granted 19.1K · Sold 9.3K
Granted 19.5K · Sold 8.1K
Granted 18.4K
Granted 7.2K
Granted 11.4K · Bought 1.0K
Granted 11.2K
Granted 11.2K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Klein Michael RDirector · 9 transactions | -10.2% | 1.85Mas of Dec 2024 | 7.8K | — | 71.6K |
| Florance Andrew CPresident and CEO, Director · 20 transactions | +29.1% | 1.72M | 1.02M | 141.9K | — |
| Wheeler Scott TChief Financial Officer · 15 transactions | +6.8% | 745.3Kas of Apr 2024 | 144.0K | — | 122.7K |
| Nassetta Christopher JDirector · 6 transactions | — | 549.3Kas of Dec 2024 | 7.8K | — | 3.2K |
| Simuro FrankChief Technology Officer · 17 transactions | +56.7% | 414.5K | 257.1K | — | — |
| Saint Frederick G.President, Marketplaces · 21 transactions | +17.6% | 279.9K | 179.5K | 20.0K | 77.5K |
| Ruggles LisaSenior VP, Global Operations · 20 transactions | +12% | 174.9K | 123.0K | — | 20.0K |
| Lown Christian M.Chief Financial Officer · 4 transactions | — | 135.3K | 109.9K | — | — |
| Glosserman Michael JDirector · 1 transaction | +4% | 101.5Kas of Oct 2023 | 3.9K | — | — |
| Boxer GeneGeneral Counsel and Secretary · 11 transactions | +429.3% | 95.5K | 88.2K | — | — |
| Desmarais Michael JChief Human Resources Officer · 14 transactions | +91% | 87.7K | 69.4K | — | 9.3K |
| Sams Louise SDirector · 5 transactions | +222.8% | 28.7K | 18.8K | 1.0K | — |
| Musslewhite Robert WDirector · 4 transactions | +218.6% | 26.5K | 18.2K | — | — |
| Hill John WDirector · 9 transactions | +56.4% | 26.5K | 19.1K | — | 9.3K |
| Cann Cynthia CammettChief Accounting Officer · 16 transactions | — | 24.7K | 19.5K | — | 8.1K |
| Brunner Angelique G.Director · 4 transactions | — | 18.4K | 18.4K | — | — |
| Kaplan Laura CoxDirector · 2 transactions | +67% | 17.8Kas of Jul 2024 | 7.2K | — | — |
| Glaser Rachel CDirector · 3 transactions | — | 12.4K | 11.4K | 1.0K | — |
| McCarthy Christine MDirector · 2 transactions | — | 11.6K | 11.2K | — | — |
| Berisford John LDirector · 2 transactions | — | 11.2K | 11.2K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: -157.9K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.