CoStar Group insider trading
Real Estate · Strong buyingShare price and insider trades
Valuation, profit and volume
Summary
Over the past 12 months, 4 CoStar Group insiders reported open-market purchases totaling $8.5M, while 2 insiders reported sales totaling $534K. The most recent cluster buy began on Feb 27, 2026, when 4 insiders bought a combined $3.5M. Among insiders with enough purchase history to measure, Andrew C Florance (CEO) has the highest Insider Score at 13. 0 of 4 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales. 42 grants, option exercises and tax withholdings are not shown.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 10SEC | Cynthia Cammett CannChief Accounting Officer | Sell | 4,788 | $30.78 | $147K | -10.1% | — |
| Aug 10SEC | John W HillDirector | Sell | 3,500 | $30.21 | $106K | -8.4% | — |
| Aug 5SEC | Andrew C FloranceCEO | Buy | 83,300 | $29.89 | $2.5M | -7.5% | 13 |
| May 4SEC | Andrew C FloranceCEO, President | Buy | 68,330 | $35.17 | $2.4M | -21.4% | 13 |
| May 4SEC | Andrew C FloranceCEO, President | Buy | 3,100 | $35.82 | $111K | -22.8% | 13 |
| Mar 9SEC | Louise S SamsDirector | Buy | 1,000 | $48.36 | $48K | -42.8% | — |
| Mar 3SEC | Frederick G. SaintPresident | Buy | 20,000 | $45.33 | $907K | -39.0% | — |
| Mar 3SEC | Rachel C GlaserDirector | Buy | 1,000 | $44.94 | $45K | -38.5% | — |
| Mar 2SEC | Andrew C FloranceCEO, President | Buy | 55,720 | $44.52 | $2.5M | -37.9% | 13 |
| Nov 17SEC | John W HillDirector | Sell | 2,250 | $68.68 | $155K | -59.7% | — |
| Nov 17SEC | Cynthia Cammett CannChief Accounting Officer | Sell | 1,841 | $68.79 | $127K | -59.8% | — |
Insiders at CoStar Group
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Andrew C FloranceCEO | $7.5M | — | Aug 5, 2026 | 13 |
| Frederick G. SaintPresident | $907K | — | Aug 4, 2026 | — |
| Cynthia Cammett CannChief Accounting Officer | — | $274K | Aug 10, 2026 | — |
| John W HillDirector | — | $260K | Aug 10, 2026 | — |
| Louise S SamsDirector | $48K | — | Jun 24, 2026 | — |
| Rachel C GlaserDirector | $45K | — | Jun 24, 2026 | — |
| Christian M. LownCFO | — | — | Jul 6, 2026 | — |
| Robert W MusslewhiteDirector | — | — | Jun 24, 2026 | — |
| John L BerisfordDirector | — | — | Jun 24, 2026 | — |
| Christine M MccarthyDirector | — | — | Jun 24, 2026 | — |
| Angelique G. BrunnerDirector | — | — | Jun 24, 2026 | — |
| Frank SimuroCTO | — | — | Mar 17, 2026 | — |
| Lisa RugglesSenior Vp, Global Operations | — | — | Mar 17, 2026 | — |
| Michael J DesmaraisChief Human Resources Officer | — | — | Mar 17, 2026 | — |
| Gene BoxerGeneral Counsel | — | — | Mar 17, 2026 | — |
Insider activity at other Real Estate companies
Same sector, ranked by insider buying in the last 90 days.
Common questions about CSGP insiders
Are CoStar Group insiders buying CSGP stock?
In the past 12 months, 4 insiders reported open-market purchases of CSGP worth $8.5M. The latest was CEO Andrew C Florance bought $2.5M of CSGP at $29.89.
Are CoStar Group insiders selling CSGP stock?
2 insiders reported sales worth $534K over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.