CSGP
COSTAR GROUP, INC.
Latest Form 4:Sale$106KbyHill John W (Director) · filed Aug 10, 2026
COSTAR GROUP, INC. (CSGP) has 45 SEC Form 4 filings (51 transaction rows) in the rolling window, disclosed by 6 distinct insiders. Most recent filing: Aug 10, 2026.
The most active filer is Founder and CEO FLORANCE ANDREW C with 3 filings. Insiders have net bought $8.2M over the trailing 6 months. The largest single insider purchase in this window was $2.5M by President and CEO FLORANCE ANDREW C on May 1, 2026.
- Industry:Real Estate - Services
- CEO:Andrew C. Florance
- Employees:8,441
- HQ:Arlington, VA, US
- IPO:1998-07-01
Insider Buying
$8.5M
reported purchases (SEC code P)
Insider Selling
$253K
reported sales (SEC code S)
Unique Insiders
6
in the rolling window
Market Cap
$13.1B
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
Hill John WFirst filing | Director | Sale | 3,500 | $106K | Aug 10 | SEC ↗ |
Cann Cynthia CammettFirst filing | Chief Accounting Officer | Sale | 4,788 | $147K | Aug 10 | SEC ↗ |
FLORANCE ANDREW CFirst in 3 months | Founder and CEO | Purchase | 83,300 | $2.5M | Aug 5 | SEC ↗ |
| President and CEO | Purchase | 71,430 | $2.5M | May 4 | SEC ↗ | |
Sams Louise SFirst filing | Director | Purchase | 1,000 | $48K | Mar 9 | SEC ↗ |
SAINT FREDERICK G.First filing | President, Marketplaces | Purchase | 20,000 | $907K | Mar 3 | SEC ↗ |
Glaser Rachel CFirst filing | Director | Purchase | 1,000 | $45K | Mar 3 | SEC ↗ |
FLORANCE ANDREW CFirst filing | President and CEO | Purchase | 55,720 | $2.5M | Mar 2 | SEC ↗ |
Congress trading CSGP
See timeline →- DRep. Gilbert CisnerosSale$1,001 - $15,0002026-04-14
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Related companies
COSTAR GROUP, INC. is in the Services sector.