Brian J. Radecki is CFO at COSTAR GROUP INC (CSGP). They have made 10 open-market trades across 1 company since 2012, most recently 2026-05-27.
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 10 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CSGP | SELL | 2015-03-13 | 2015-03-13 | $192.53 | $866K | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2015-03-02 | 2015-03-03 | $197.14 | $2.9M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2014-03-07 | 2014-03-11 | $208.83 | $4.4M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2013-11-20 | 2013-11-22 | $180.10 | $1.5M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2013-07-30 | 2013-08-01 | $157.00 | $1.6M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2013-03-05 | 2013-03-06 | $103.45 | $2.1M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2012-12-31 | 2013-01-03 | $89.00 | $1.6M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2012-05-22 | 2012-05-24 | $71.16 | $1.8M | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2012-05-11 | 2012-05-15 | $70.50 | $4K | -11.4% | -2.9% | -2.9% |
| CSGP | SELL | 2012-05-04 | 2012-05-08 | $70.57 | $743K | -11.4% | -2.9% | -2.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.