CoStar Group (CSGP) insider trading in the last 6 months

Form 4 filings, newest first

Quality Score today 3

One insider bought $2.5M, 2 sold $253K.

SellCynthia Cammett Cann$147KChief Accounting Officerat $30.78 on Aug 7, filed Aug 10

SellCynthia Cammett CannChief Accounting Officer$147Kat $30.78 on Aug 7, filed Aug 10

SellJohn W. Hill$106KDirectorat $30.21 on Aug 5, filed Aug 10

SellJohn W. HillDirector$106Kat $30.21 on Aug 5, filed Aug 10

BuyAndrew C. Florance$2.5MFounder and CEOat $29.89 on Aug 4, filed Aug 5

BuyAndrew C. FloranceFounder and CEO$2.5Mat $29.89 on Aug 4, filed Aug 5

From SEC Form 4s, the newest filed Aug 10, 2026 · Insiders have 2 business days to file a trade

We do the work for you. Every stock is scored and ranked, every 15 seconds while the market is open. Here it's 15 minutes behind. Pro members see it live.

See all 3 tradesSee it live, free until Wednesday morning. No account. No card. Then keep going with a free account.

Pro members see every filing on CSGP with what each insider bought or sold and at what price, and can turn on an optional alert when an insider buys.

Who files at CoStar Group

Insider trades by person

Tested. Our top-⁠scored stocks returned 2.2x the average stock over the next month. How we tested it

Questions about CSGP's insider trades

As of Nov 2, 2026: CoStar Group (CSGP) has 3 insider filings on record in the last 6 months, the newest filed Aug 10, 2026. Its Quality Score is 3 (Below Average). Scores as of 5:08 PM ET, 15 minutes behind.

Are CSGP insiders buying or selling?

One insider bought $2.5M across 1 filing, and 2 insiders sold $253K across 2 filings, in the last 6 months. The newest filing: Cynthia Cammett Cann, Chief Accounting Officer, sold $147K on Aug 7, 2026.

Who are CSGP's biggest insider sellers?

By the dollars of their sales in the last 6 months: Cynthia Cammett Cann (Chief Accounting Officer), 1 sale; John W. Hill (Director), 1 sale.

When did a CSGP insider last buy?

Andrew C. Florance, Founder and CEO, bought CSGP shares ($2.5M) on Aug 4, 2026, filed Aug 5, 2026, the newest insider buy on record.

CoStar Group's page has its Quality Score, its chart, and its earnings. More in Real Estate and Services-Business Services.