LIVE FROM THE DATABASETRANSACTIONS 362,430COMPANIES 5,763LATEST TRADE Oct 16UPDATED Oct 17, 12:31 AM
CSGPCIK 0001057352

COSTAR GROUP, INC.

63 transactions by 16 insiders, from November 13, 2025 to October 15, 2026.

Transactions
6316 insiders
Bought · P
$8.5Mopen market
Sold · S
$534Kopen market
Net
+$8.0Mnet buying

Officers and directors

People inside the company. What they do with their own shares is the reason this data exists.

InsiderTradesPlannedBoughtSold
Andrew C. FloranceCEO10—$7.5M—
Cynthia Cammett CannCAO9——$274K
Frederick G. SaintPres7—$907K—
Frank SimuroCTO6———
Lisa RugglesVP6———
Christian M. LownCFO4———
Gene BoxerGC4———
Michael J. DesmaraisChief4———
John W. HillDir3——$260K
Louise S. SamsDir2—$48K—
Robin Jack RossmannChief2———
Rachel C. GlaserDir2—$45K—
John L. BerisfordDir1———
Angelique G. BrunnerDir1———
Christine M. McCarthyDir1———
Robert W. MusslewhiteDir1———

All transactions

63 in total, newest filings first.

InsiderDateCodeSharesPriceValue
Robin Jack RossmannChiefOct 15F756$32.00$24K
Cynthia Cammett CannCAOAug 7S4,788$30.78$147K
John W. HillDirAug 5S3,500$30.21$106K
Andrew C. FloranceCEOAug 4P83,300$29.89$2.5M
Robin Jack RossmannChiefDERIVJul 31A34,771$0.00—?
Frederick G. SaintPresAug 1F1,436$28.76$41K
Cynthia Cammett CannCAODERIVJul 31A26,078$0.00—?
Cynthia Cammett CannCAOAug 1F1,077$28.76$31K
Christian M. LownCFOJul 1F5,597$29.36$164K
Louise S. SamsDirJun 23A8,262$0.00—
Christine M. McCarthyDirJun 23A8,262$0.00—
Rachel C. GlaserDirJun 23A8,262$0.00—
Robert W. MusslewhiteDirJun 23A8,262$0.00—
John W. HillDirJun 23A8,262$0.00—
Angelique G. BrunnerDirJun 23A8,262$0.00—
John L. BerisfordDirJun 23A8,262$0.00—
Cynthia Cammett CannCAOJun 15F461$32.04$15K
Andrew C. FloranceCEOMay 1P3,100$35.82$111K
Andrew C. FloranceCEOMay 1P68,330$35.17$2.4M
Frank SimuroCTOMar 15F11,107$43.63$485K
Michael J. DesmaraisChiefMar 15F2,873$43.63$125K
Lisa RugglesVPMar 15F2,977$43.63$130K
Cynthia Cammett CannCAOMar 15F1,194$43.63$52K
Gene BoxerGCMar 15F428$43.63$19K
Michael J. DesmaraisChiefMar 10A17,676——
Christian M. LownCFOMar 10A12,268——
Cynthia Cammett CannCAOMar 10A4,374——
Andrew C. FloranceCEOMar 10A124,162——
Gene BoxerGCMar 10A21,920——
Louise S. SamsDirMar 6P1,000$48.36$48K
Frank SimuroCTODERIVFeb 27A52,869$0.00—?
Frank SimuroCTOMar 1F18,702$44.63$835K
Michael J. DesmaraisChiefDERIVFeb 27A17,926$0.00—?
Michael J. DesmaraisChiefMar 1F6,353$44.63$284K
Lisa RugglesVPDERIVFeb 27A28,197$0.00—?
Lisa RugglesVPMar 1F8,931$44.63$399K
Christian M. LownCFODERIVFeb 27A39,652$0.00—?
Christian M. LownCFOMar 1F7,175$44.63$320K
Frederick G. SaintPresDERIVFeb 27A39,652$0.00—?
Frederick G. SaintPresMar 2P20,000$45.33$907K
Frederick G. SaintPresMar 1F11,096$44.63$495K
Rachel C. GlaserDirMar 2P1,000$44.94$45K
Cynthia Cammett CannCAODERIVFeb 27A6,834$0.00—?
Cynthia Cammett CannCAOMar 1F1,385$44.63$62K
Andrew C. FloranceCEODERIVFeb 27A83,708$0.00—?
Andrew C. FloranceCEOMar 1F59,593$44.63$2.7M
Gene BoxerGCDERIVFeb 27A26,888$0.00—?
Gene BoxerGCMar 1F4,547$44.63$203K
Andrew C. FloranceCEOFeb 27P55,720$44.52$2.5M
Frank SimuroCTOFeb 19F4,421$49.07$217K
Frank SimuroCTOFeb 19D30,727$0.00—
Lisa RugglesVPFeb 19F3,219$49.07$158K
Lisa RugglesVPFeb 19D17,583$0.00—
Frederick G. SaintPresFeb 19F2,149$49.07$105K
Frederick G. SaintPresFeb 19D17,583$0.00—
Andrew C. FloranceCEOFeb 19F19,221$49.07$943K
Andrew C. FloranceCEOFeb 19D104,983$0.00—
Frank SimuroCTOFeb 15F4,151$44.99$187K
Lisa RugglesVPFeb 15F3,576$44.99$161K
Frederick G. SaintPresFeb 15F2,424$44.99$109K
Andrew C. FloranceCEOFeb 15F17,482$44.99$787K
John W. HillDirNov 13S2,250$68.68$155K
Cynthia Cammett CannCAONov 13S1,841$68.79$127K