MetaCap

CoStar Group Insider Trades

NASDAQ: CSGPFinanceReal EstateUSD

29.74-0.075 (-0.25%)

Market open · Delayed 15 min · as of Oct 9, 1:21 PM ET

Last 12 months

Purchases
7 · $8.48M
Sales
2 · $253.11K
Shares bought / sold
232.45K / 8.29K
Net activity
Net buying $8.2 million

CoStar Group insider activity

Over the last 12 months, CoStar Group insiders reported 41 transactions on SEC Form 4: 7 open-market purchases and 2 sales. Insiders bought $8.5 million and sold $253,110 worth of stock, for net insider buying of $8.2 million. The largest seller was Cann Cynthia Cammett, with $147,375 in reported sales.

The most recent filing shows Cann Cynthia Cammett (Chief Accounting Officer) selling 4,788 shares at $30.78 on Aug 7, 2026. Insider sales are common for compensation, tax and diversification reasons, while open-market purchases are rarer; tracking both helps put CSGP's ownership changes in context.

Summary generated from market data by MetaCap's automated system. Methodology

CSGP insider transactions

CoStar Group insider transactions
DateInsiderTypeSharesValueFiling
Aug 7, 2026Cann Cynthia CammettChief Accounting OfficerSale4,788$147.37KForm 4
Aug 5, 2026Hill John WDirectorSale3,500$105.73KForm 4
Aug 4, 2026FLORANCE ANDREW CFounder and CEOBuy83,300$2.49MForm 4
Aug 1, 2026SAINT FREDERICK G.President, MarketplacesTax withholding1,436$41.30KForm 4
Aug 1, 2026Cann Cynthia CammettChief Accounting OfficerTax withholding1,077$30.97KForm 4
Jul 1, 2026LOWN CHRISTIAN M.Chief Financial OfficerTax withholding5,597$164.33KForm 4
Jun 23, 2026McCarthy Christine MDirectorAward8,262—Form 4
Jun 23, 2026Musslewhite Robert WDirectorAward8,262—Form 4
Jun 23, 2026BERISFORD JOHN LDirectorAward8,262—Form 4
Jun 23, 2026Glaser Rachel CDirectorAward8,262—Form 4
Jun 23, 2026Sams Louise SDirectorAward8,262—Form 4
Jun 23, 2026Brunner Angelique G.DirectorAward8,262—Form 4
Jun 23, 2026Hill John WDirectorAward8,262—Form 4
Jun 15, 2026Cann Cynthia CammettChief Accounting OfficerTax withholding461$14.77KForm 4
May 1, 2026FLORANCE ANDREW CPresident and CEOBuy3,100$111.04KForm 4
May 1, 2026FLORANCE ANDREW CPresident and CEOBuy68,330$2.40MForm 4
Mar 15, 2026Cann Cynthia CammettChief Accounting OfficerTax withholding1,194$52.09KForm 4
Mar 15, 2026DESMARAIS MICHAEL JChief Human Resources OfficerTax withholding2,873$125.35KForm 4
Mar 15, 2026SIMURO FRANKChief Technology OfficerTax withholding11,107$484.60KForm 4
Mar 15, 2026Boxer GeneGeneral Counsel and SecretaryTax withholding428$18.67KForm 4
Mar 15, 2026Ruggles LisaSenior VP, Global OperationsTax withholding2,977$129.89KForm 4
Mar 15, 2026Boxer GeneGeneral Counsel and SecretaryTax withholding482$21.03KForm 4
Mar 10, 2026LOWN CHRISTIAN M.Chief Financial OfficerAward12,268—Form 4
Mar 10, 2026Boxer GeneGeneral Counsel and SecretaryAward21,920—Form 4
Mar 10, 2026DESMARAIS MICHAEL JChief Human Resources OfficerAward17,676—Form 4
Mar 10, 2026Cann Cynthia CammettChief Accounting OfficerAward4,374—Form 4
Mar 10, 2026FLORANCE ANDREW CPresident and CEOAward124,162—Form 4
Mar 6, 2026Sams Louise SDirectorBuy1,000$48.36KForm 4
Mar 2, 2026SAINT FREDERICK G.President, MarketplacesBuy20,000$906.60KForm 4
Mar 2, 2026Glaser Rachel CDirectorBuy1,000$44.94KForm 4
Mar 1, 2026SIMURO FRANKChief Technology OfficerTax withholding18,702$834.67KForm 4
Mar 1, 2026Ruggles LisaSenior VP, Global OperationsTax withholding8,931$398.59KForm 4
Mar 1, 2026SAINT FREDERICK G.President, MarketplacesTax withholding11,096$495.21KForm 4
Mar 1, 2026LOWN CHRISTIAN M.Chief Financial OfficerTax withholding7,175$320.22KForm 4
Mar 1, 2026Cann Cynthia CammettChief Accounting OfficerTax withholding1,385$61.81KForm 4
Mar 1, 2026DESMARAIS MICHAEL JChief Human Resources OfficerTax withholding6,353$283.53KForm 4
Mar 1, 2026Boxer GeneGeneral Counsel and SecretaryTax withholding4,547$202.93KForm 4
Mar 1, 2026FLORANCE ANDREW CPresident and CEOTax withholding59,593$2.66MForm 4
Feb 27, 2026FLORANCE ANDREW CPresident and CEOBuy55,720$2.48MForm 4
Feb 19, 2026SIMURO FRANKChief Technology OfficerTax withholding4,421$216.94KForm 4
Feb 19, 2026SIMURO FRANKChief Technology OfficerDisposition30,727—Form 4

Transaction codes follow SEC Form 4: P = open-market purchase, S = open-market sale, A = grant or award, M = option exercise, F = shares withheld for taxes. About Form 4

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