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CSGP

COSTAR GROUP, INC.

NASDAQ · Real Estate · Real Estate - Services · US

$28.14
+2.18%
Ask drillr
1
Insider buys (3m)
2
Insider sells (3m)
$2.2M
Net value (3m)
-6.1%
Price return (3m)
Form 4 filings
DateInsiderActivitySharesPrice
Oct 16, 2026Rossmann Robin Jack · officer: Chief Financial OfficerF-InKind756$32
Aug 10, 2026Cann Cynthia Cammett · officer: Chief Accounting OfficerSale4,788$31
Aug 10, 2026Hill John W · directorSale3,500$30
Aug 5, 2026FLORANCE ANDREW C · director, officer: Founder and CEOPurchase83,300$30
Aug 4, 2026Cann Cynthia Cammett · officer: Chief Accounting OfficerA-Award26,078$0.00
Aug 4, 2026Rossmann Robin Jack · officer: Chief Financial OfficerA-Award34,771$0.00
Aug 4, 2026Cann Cynthia Cammett · officer: Chief Accounting OfficerF-InKind1,077$29
Aug 4, 2026SAINT FREDERICK G. · officer: President, MarketplacesF-InKind1,436$29
Jul 6, 2026LOWN CHRISTIAN M. · officer: Chief Financial OfficerF-InKind5,597$29
Jun 24, 2026Hill John W · directorA-Award8,262$0.00
Jun 24, 2026BERISFORD JOHN L · directorA-Award8,262$0.00
Jun 24, 2026Glaser Rachel C · directorA-Award8,262$0.00
Jun 24, 2026McCarthy Christine M · directorA-Award8,262$0.00
Jun 24, 2026Brunner Angelique G. · directorA-Award8,262$0.00
Jun 24, 2026Musslewhite Robert W · directorA-Award8,262$0.00
Jun 24, 2026Sams Louise S · directorA-Award8,262$0.00
Jun 16, 2026Cann Cynthia Cammett · officer: Chief Accounting OfficerF-InKind461$32
May 4, 2026FLORANCE ANDREW C · director, officer: President and CEOPurchase3,100$36
May 4, 2026FLORANCE ANDREW C · director, officer: President and CEOPurchase68,330$35
Mar 17, 2026Cann Cynthia Cammett · officer: Chief Accounting OfficerF-InKind1,194$44
Mar 17, 2026Boxer Gene · officer: General Counsel and SecretaryF-InKind428$44
Mar 17, 2026DESMARAIS MICHAEL J · officer: Chief Human Resources OfficerF-InKind2,873$44
Mar 17, 2026SIMURO FRANK · officer: Chief Technology OfficerF-InKind11,107$44
Mar 17, 2026Boxer Gene · officer: General Counsel and SecretaryF-InKind482$44
Mar 17, 2026Ruggles Lisa · officer: Senior VP, Global OperationsF-InKind2,977$44
Mar 11, 2026Cann Cynthia Cammett · officer: Chief Accounting OfficerA-Award4,374$46
Mar 11, 2026Boxer Gene · officer: General Counsel and SecretaryA-Award21,920$46
Mar 11, 2026LOWN CHRISTIAN M. · officer: Chief Financial OfficerA-Award12,268$46
Mar 11, 2026DESMARAIS MICHAEL J · officer: Chief Human Resources OfficerA-Award17,676$46
Mar 11, 2026FLORANCE ANDREW C · director, officer: President and CEOA-Award124,162$46
Institutional positioning

13F filings over the trailing two quarters

New 253Increased 602Reduced 552Sold out 142
FilerActionSharesFiled
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position38,234,133May 8, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCReduced37,914,844Aug 13, 2026
BlackRock, Inc.Increased33,813,969Aug 7, 2026
BLACKROCK, INC.Reduced33,808,184May 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position27,423,903May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCReduced26,683,792Aug 13, 2026
BAMCO INC /NY/Increased21,626,763Aug 14, 2026
STATE STREET CORPIncreased18,650,975May 15, 2026
STATE STREET CORPReduced18,410,876Sep 22, 2026
PRINCIPAL FINANCIAL GROUP INCIncreased17,696,192May 4, 2026
Capital International InvestorsIncreased16,643,016Aug 12, 2026
BAMCO INC /NY/Reduced16,314,175May 15, 2026
CAPITAL INTERNATIONAL INVESTORSIncreased15,513,753May 13, 2026
BAILLIE GIFFORD & COIncreased13,610,922May 8, 2026
BAILLIE GIFFORD & COReduced13,154,165Aug 6, 2026

Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Oct 16, 2026