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Costar Group, Inc.(CSGP US)

$30.27-0.070.21%Ext:$30.80+0.541.78%(Pre-Market ยท 13:19:37 UTC)
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Overview

ProfileEntity Structure

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SEC Filings
CategorizedChronologicalBy Owner

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FinancialsChartingShort InterestEmployees
Logo
  • Home
  • AI Agent
  • Annotations
  • Files
  • Pricing and plans
  • BlogAboutContact us
    APIMCP
    Terms of servicePrivacy policy

  • Get the full experience

    We save the real magic for signed-in users.

HomeStock ScreenerDocument SearchChartingWatchlistsRecent Filings

Costar Group, Inc.(CSGP US)

$30.27-0.070.21%Ext:$30.80+0.541.78%(Pre-Market ยท 13:19:37 UTC)
Doc SearchProfileEntity StructureFinancialsChartingShort InterestEmployees

Overview

ProfileEntity Structure

Documents

SEC Filings
CategorizedChronologicalBy Owner

Financials & Metrics

FinancialsChartingShort InterestEmployees
CSGP USโ€‹
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SEC Filings by Owner

SEC Filings by Owner

Insider Ownership

FLORANCE ANDREW C(130)

  • Form 4Statement of changes in beneficial ownership5 Aug
  • Form 4Statement of changes in beneficial ownership4 May
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership2 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership7 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Feb 2025

Ruggles Lisa(52)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership3 Jun 2025
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Feb 2025
  • Form 4Statement of changes in beneficial ownership24 Feb 2025
  • Form 4Statement of changes in beneficial ownership4 Jun 2024

KLEIN MICHAEL R(46)

  • Form 4Statement of changes in beneficial ownership12 Dec 2024
  • Form 4Statement of changes in beneficial ownership28 Oct 2024
  • Form 4Statement of changes in beneficial ownership30 Jul 2024
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Dec 2023
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership25 May 2023
  • Form 5Annual statement of beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership9 Aug 2022

CARCHEDI FRANCIS(46)

  • Form 4Statement of changes in beneficial ownership2 Oct 2018
  • Form 4Statement of changes in beneficial ownership31 Jul 2018
  • Form 4Statement of changes in beneficial ownership3 Apr 2018
  • Form 4Statement of changes in beneficial ownership13 Mar 2018
  • Form 4Statement of changes in beneficial ownership9 Mar 2018
  • Form 4Statement of changes in beneficial ownership6 Mar 2018
  • Form 4Statement of changes in beneficial ownership1 Mar 2018
  • Form 4Statement of changes in beneficial ownership3 May 2017
  • Form 4Statement of changes in beneficial ownership14 Mar 2017
  • Form 4Statement of changes in beneficial ownership7 Mar 2017

Wheeler Scott T(45)

  • Form 4Statement of changes in beneficial ownership30 Apr 2024
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership14 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024
  • Form 4Statement of changes in beneficial ownership26 Feb 2024
  • Form 4Statement of changes in beneficial ownership20 Feb 2024
  • Form 4Statement of changes in beneficial ownership30 Jun 2023
  • Form 4Statement of changes in beneficial ownership14 Jun 2023
  • Form 4Statement of changes in beneficial ownership5 May 2023
  • Form 4Statement of changes in beneficial ownership17 Mar 2023

Radecki Brian J(44)

  • Form 4Statement of changes in beneficial ownership13 Mar 2015
  • Form 4Statement of changes in beneficial ownership9 Mar 2015
  • Form 4Statement of changes in beneficial ownership3 Mar 2015
  • Form 4Statement of changes in beneficial ownership24 Feb 2015
  • Form 4PRIMARY DOCUMENT11 Mar 2014
  • Form 4PRIMARY DOCUMENT6 Mar 2014
  • Form 4PRIMARY DOCUMENT4 Mar 2014
  • Form 4PRIMARY DOCUMENT25 Feb 2014
  • Form 4PRIMARY DOCUMENT24 Dec 2013
  • Form 4PRIMARY DOCUMENT22 Nov 2013

Stanfill John L(38)

  • Form 4PRIMARY DOCUMENT12 Mar 2014
  • Form 4PRIMARY DOCUMENT6 Mar 2014
  • Form 4PRIMARY DOCUMENT4 Mar 2014
  • Form 4PRIMARY DOCUMENT25 Feb 2014
  • Form 4PRIMARY DOCUMENT13 Nov 2013
  • Form 4PRIMARY DOCUMENT13 Mar 2013
  • Form 4PRIMARY DOCUMENT6 Mar 2013
  • Form 4PRIMARY DOCUMENT25 Feb 2013
  • Form 4PRIMARY DOCUMENT6 Sep 2012
  • Form 4PRIMARY DOCUMENT8 May 2012

Hill John W(35)

  • Form 4Statement of changes in beneficial ownership10 Aug
  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership17 Nov 2025
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership12 Dec 2024
  • Form 4Statement of changes in beneficial ownership1 Aug 2024
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership29 Nov 2023
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership28 Jun 2023

NASSETTA CHRISTOPHER J(33)

  • Form 4Statement of changes in beneficial ownership2 Dec 2024
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership9 May 2024
  • Form 4Statement of changes in beneficial ownership9 Nov 2023
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership12 Nov 2021
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 4Statement of changes in beneficial ownership28 Oct 2019

Kitchen Jennifer(32)

  • Form 4PRIMARY DOCUMENT11 Sep 2013
  • Form 4PRIMARY DOCUMENT13 Mar 2013
  • Form 4PRIMARY DOCUMENT6 Mar 2013
  • Form 4PRIMARY DOCUMENT25 Feb 2013
  • Form 4PRIMARY DOCUMENT13 Sep 2012
  • Form 4PRIMARY DOCUMENT8 May 2012
  • Form 4PRIMARY DOCUMENT13 Mar 2012
  • Form 4PRIMARY DOCUMENT6 Mar 2012
  • Form 4PRIMARY DOCUMENT23 Feb 2012
  • Form 4PRIMARY DOCUMENT1 Jun 2011

Linnington Matthew(31)

  • Form 4Statement of changes in beneficial ownership13 Aug 2020
  • Form 4Statement of changes in beneficial ownership2 Apr 2020
  • Form 4Statement of changes in beneficial ownership3 Mar 2020
  • Form 4Statement of changes in beneficial ownership19 Feb 2020
  • Form 4Statement of changes in beneficial ownership10 Feb 2020
  • Form 4Statement of changes in beneficial ownership1 Aug 2019
  • Form 4Statement of changes in beneficial ownership3 Jun 2019
  • Form 4Statement of changes in beneficial ownership2 Apr 2019
  • Form 4Statement of changes in beneficial ownership12 Mar 2019
  • Form 4Statement of changes in beneficial ownership4 Mar 2019

Marples Paul(30)

  • Form 4PRIMARY DOCUMENT1 Aug 2012
  • Form 4PRIMARY DOCUMENT15 May 2012
  • Form 4PRIMARY DOCUMENT13 Mar 2012
  • Form 4PRIMARY DOCUMENT6 Mar 2012
  • Form 4PRIMARY DOCUMENT23 Feb 2012
  • Form 4PRIMARY DOCUMENT2 Aug 2011
  • Form 4PRIMARY DOCUMENT1 Jun 2011
  • Form 4PRIMARY DOCUMENT4 May 2011
  • Form 4PRIMARY DOCUMENT14 Mar 2011
  • Form 4PRIMARY DOCUMENT8 Mar 2011

SAINT FREDERICK G.(28)

  • Form 4Statement of changes in beneficial ownership4 Aug
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership2 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2025
  • Form 4Statement of changes in beneficial ownership29 Jul 2025
  • Form 4Statement of changes in beneficial ownership12 Jun 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025

HABER WARREN H(21)

  • Form 4Statement of changes in beneficial ownership24 Sep 2018
  • Form 4Statement of changes in beneficial ownership14 Sep 2017
  • Form 4Statement of changes in beneficial ownership15 Sep 2016
  • Form 4Statement of changes in beneficial ownership11 Sep 2015
  • Form 4Statement of changes in beneficial ownership15 Sep 2014
  • Form 4PRIMARY DOCUMENT21 Aug 2014
  • Form 4PRIMARY DOCUMENT23 Sep 2013
  • Form 4PRIMARY DOCUMENT22 Aug 2013
  • Form 4PRIMARY DOCUMENT1 Oct 2012
  • Form 4PRIMARY DOCUMENT12 Jun 2012

DESMARAIS MICHAEL J(21)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership7 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership27 Nov 2024
  • Form 4Statement of changes in beneficial ownership30 Apr 2024
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024

Glosserman Michael J(19)

  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 4Statement of changes in beneficial ownership2 Jan 2020
  • Form 4Statement of changes in beneficial ownership23 Sep 2019
  • Form 4Statement of changes in beneficial ownership24 Sep 2018
  • Form 4Statement of changes in beneficial ownership14 Sep 2017
  • Form 4Statement of changes in beneficial ownership15 Sep 2016
  • Form 4Statement of changes in beneficial ownership2 Aug 2016

BONDERMAN DAVID(17)

  • Form 4Statement of changes in beneficial ownership15 Sep 2014
  • Form 4PRIMARY DOCUMENT14 Aug 2014
  • Form 4PRIMARY DOCUMENT23 Sep 2013
  • Form 4PRIMARY DOCUMENT22 Aug 2013
  • Form 4PRIMARY DOCUMENT1 Oct 2012
  • Form 4PRIMARY DOCUMENT30 May 2012
  • Form 4PRIMARY DOCUMENT14 Sep 2011
  • Form 4PRIMARY DOCUMENT12 Sep 2011
  • Form 4PRIMARY DOCUMENT7 Sep 2010
  • Form 4PRIMARY DOCUMENT1 Apr 2010

SIMURO FRANK(17)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Feb 2025
  • Form 4Statement of changes in beneficial ownership24 Feb 2025
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024

Cann Cynthia Cammett(16)

  • Form 4Statement of changes in beneficial ownership10 Aug
  • Form 4Statement of changes in beneficial ownership4 Aug
  • Form 4Statement of changes in beneficial ownership16 Jun
  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership17 Nov 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2025
  • Form 4Statement of changes in beneficial ownership29 Jul 2025
  • Form 4Statement of changes in beneficial ownership17 Jun 2025

Tully Christopher(14)

  • Form 4PRIMARY DOCUMENT29 May 2008
  • Form 4PRIMARY DOCUMENT29 Apr 2008
  • Form 4PRIMARY DOCUMENT21 Apr 2008
  • Form 4PRIMARY DOCUMENT11 Mar 2008
  • Form 4PRIMARY DOCUMENT29 Feb 2008
  • Form 4PRIMARY DOCUMENT1 May 2007
  • Form 4PRIMARY DOCUMENT18 Apr 2007
  • Form 4PRIMARY DOCUMENT13 Mar 2007
  • Form 4PRIMARY DOCUMENT14 Dec 2006
  • Form 4PRIMARY DOCUMENT1 May 2006

Kaplan Laura Cox(13)

  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership8 Nov 2021
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership3 May 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 4Statement of changes in beneficial ownership19 Nov 2019
  • Form 4Statement of changes in beneficial ownership23 Sep 2019
  • Form 4Statement of changes in beneficial ownership24 Sep 2018

Boxer Gene(13)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4/AStatement of changes in beneficial ownership (amendment)17 Mar
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership7 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024
  • Form 4Statement of changes in beneficial ownership26 Feb 2024

FARRINGTON CRAIG(12)

  • Form 4PRIMARY DOCUMENT1 May 2007
  • Form 4PRIMARY DOCUMENT18 Apr 2007
  • Form 4PRIMARY DOCUMENT13 Mar 2007
  • Form 4PRIMARY DOCUMENT14 Dec 2006
  • Form 4PRIMARY DOCUMENT5 Dec 2006
  • Form 4PRIMARY DOCUMENT1 May 2006
  • Form 4PRIMARY DOCUMENT16 Mar 2006
  • Form 4PRIMARY DOCUMENT14 Mar 2006
  • Form 4PRIMARY DOCUMENT8 Jun 2005
  • Form 4PRIMARY DOCUMENT14 Mar 2005

Steinberg David Jay(12)

  • Form 4Statement of changes in beneficial ownership5 Mar 2020
  • Form 4Statement of changes in beneficial ownership23 Sep 2019
  • Form 4Statement of changes in beneficial ownership24 Sep 2018
  • Form 4Statement of changes in beneficial ownership14 Sep 2017
  • Form 4Statement of changes in beneficial ownership15 Sep 2016
  • Form 4Statement of changes in beneficial ownership11 Sep 2015
  • Form 4Statement of changes in beneficial ownership16 Jun 2015
  • Form 4Statement of changes in beneficial ownership15 Sep 2014
  • Form 4PRIMARY DOCUMENT23 Sep 2013
  • Form 4PRIMARY DOCUMENT1 Oct 2012

LOW JOSIAH O III(9)

  • Form 4PRIMARY DOCUMENT7 Sep 2010
  • Form 4PRIMARY DOCUMENT1 Jun 2010
  • Form 4PRIMARY DOCUMENT8 Dec 2009
  • Form 4PRIMARY DOCUMENT4 Sep 2008
  • Form 4PRIMARY DOCUMENT18 Sep 2007
  • Form 4PRIMARY DOCUMENT26 Oct 2006
  • Form 4PRIMARY DOCUMENT11 Oct 2005
  • Form 4PRIMARY DOCUMENT9 Sep 2004
  • Form 4PRIMARY DOCUMENT4 Sep 2003

Sams Louise S(9)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership9 Mar
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 3Initial statement of beneficial ownership20 Dec 2019

Musslewhite Robert W(8)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 3Initial statement of beneficial ownership23 Dec 2019

LOWN CHRISTIAN M.(8)

  • Form 4Statement of changes in beneficial ownership6 Jul
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership2 Jul 2025
  • Form 4Statement of changes in beneficial ownership24 Feb 2025
  • Form 3Initial statement of beneficial ownership3 Jul 2024
  • Form 4/AStatement of changes in beneficial ownership (amendment)5 Aug 2024
  • Form 4Statement of changes in beneficial ownership3 Jul 2024

Reynolds Catherine B(5)

  • Form 4PRIMARY DOCUMENT18 Sep 2007
  • Form 4PRIMARY DOCUMENT26 Oct 2006
  • Form 4PRIMARY DOCUMENT11 Oct 2005
  • Form 4PRIMARY DOCUMENT9 Sep 2004
  • Form 3PRIMARY DOCUMENT16 Jun 2004

Brunner Angelique G.(5)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 3Initial statement of beneficial ownership2 Aug 2023

McCarthy Christine M(4)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 3Initial statement of beneficial ownership14 Apr 2025
  • Form 3/AInitial statement of beneficial ownership (amendment)2 Apr

Glaser Rachel C(4)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 3Initial statement of beneficial ownership14 Apr 2025

SCHAFFEL DAVID M(3)

  • Form 4PRIMARY DOCUMENT14 Mar 2005
  • Form 4PRIMARY DOCUMENT2 Mar 2004
  • Form 4PRIMARY DOCUMENT25 Sep 2003

BERISFORD JOHN L(3)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 3Initial statement of beneficial ownership14 Apr 2025

Rossmann Robin Jack(3)

  • Form 4Statement of changes in beneficial ownership16 Oct
  • Form 4Statement of changes in beneficial ownership4 Aug
  • Form 3Initial statement of beneficial ownership4 Aug

ARABE MICHAEL D(2)

  • Form 4PRIMARY DOCUMENT2 Mar 2004
  • Form 4PRIMARY DOCUMENT25 Sep 2003

Harding Catrina(2)

  • Form 4Statement of changes in beneficial ownership10 Nov
  • Form 3Initial statement of beneficial ownership10 Nov

COSTAR GROUP INC(1)

  • Form 3Initial statement of beneficial ownership6 May 2011

FOUNDERS RIG LLC(1)

  • Form 3Initial statement of beneficial ownership17 Jul 1998

Yinger Scott L(1)

  • Form 3Initial statement of beneficial ownership11 Aug 2015

Banerjee Nana(1)

  • Form 3Initial statement of beneficial ownership17 Mar

โ‰ฅ5% Ownership

BAMCO INC /NY/(17)

  • SC 13GCostar Group, Inc.14 Aug
  • SC 13G/ACostar Group, Inc.12 Feb 2021
  • SC 13G/ACostar Group, Inc.14 Feb 2020
  • SC 13G/ACostar Group Inc14 Feb 2019
  • SC 13G/ACostar Group Inc14 Feb 2018
  • SC 13G/ACostar Group Inc14 Feb 2017
  • SC 13G/ACostar Group Inc16 Feb 2016
  • SC 13G/ACostar Group Inc17 Feb 2015
  • SC 13G/ACostar Group Inc14 Feb 2014
  • SC 13G/ACostar Group Inc14 Feb 2013

VANGUARD GROUP INC(14)

  • SC 13G/ACostar Group, Inc.26 Mar
  • SC 13G/ACostar Group, Inc.13 Feb 2024
  • SC 13G/ACostar Group, Inc.9 Feb 2023
  • SC 13G/ACostar Group, Inc.11 Oct 2022
  • SC 13G/ACostar Group, Inc.9 Feb 2022
  • SC 13G/ACostar Group, Inc.10 Feb 2021
  • SC 13G/ACostar Group, Inc.12 Feb 2020
  • SC 13G/ACostar Group Inc11 Feb 2019
  • SC 13G/ACostar Group Inc9 Feb 2018
  • SC 13G/ACostar Group Inc10 Feb 2017

BlackRock Inc.(14)

  • SC 13G/ACostar Group, Inc.25 Jan 2024
  • SC 13G/ACostar Group, Inc.30 Jan 2023
  • SC 13G/ACostar Group, Inc.1 Feb 2022
  • SC 13G/ACostar Group, Inc.29 Jan 2021
  • SC 13G/ACostar Group, Inc.5 Feb 2020
  • SC 13GCostar Group Inc8 Feb 2019
  • SC 13G/ACostar Group Inc10 Jul 2014
  • SC 13G/ACostar Group Inc28 Jan 2014
  • SC 13G/ACostar Group Inc6 Feb 2013
  • SC 13GCostar Group Inc9 Feb 2012

JANUS CAPITAL MANAGEMENT LLC(13)

  • SC 13G/ACostar Group Inc13 Feb 2018
  • SC 13G/ACostar Group Inc13 Feb 2017
  • SC 13GCostar Group Inc16 Feb 2016
  • SC 13G/ACostar Group Inc31 Jan 2013
  • SC 13G/ACostar Group Inc14 Feb 2012
  • SC 13G/ACostar Group Inc14 Feb 2011
  • SC 13G/ACostar Group Inc16 Feb 2010
  • SC 13G/ACostar Group Inc17 Feb 2009
  • SC 13G/ACostar Group Inc12 Nov 2008
  • SC 13G/ACostar Group Inc14 Feb 2008

PRICE T ROWE ASSOCIATES INC /MD/(10)

  • SC 13G/ACostar Group, Inc.14 Feb 2023
  • SC 13G/ACostar Group, Inc.14 Feb 2022
  • SC 13G/ACostar Group, Inc.16 Feb 2021
  • SC 13G/ACostar Group, Inc.14 Feb 2020
  • SC 13G/ACostar Group, Inc.10 Dec 2019
  • SC 13G/ACostar Group Inc14 Feb 2019
  • SC 13GCostar Group Inc14 Feb 2018
  • SC 13G/ACostar Group Inc8 Feb 2013
  • SC 13G/ACostar Group Inc8 Feb 2012
  • SC 13GCostar Group Inc9 Feb 2011

MORGAN STANLEY(8)

  • SC 13G/ACostar Group Inc13 Feb 2013
  • SC 13G/ACostar Group Inc8 Feb 2012
  • SC 13G/ACostar Group Inc9 Feb 2011
  • SC 13G/ACostar Group Inc12 Feb 2010
  • SC 13G/ACostar Group Inc17 Feb 2009
  • SC 13G/ACostar Group Inc14 Feb 2008
  • SC 13G/ACostar Group Inc10 Sep 2007
  • SC 13GCostar Group Inc15 Feb 2007

TimesSquare Capital Management, LLC(8)

  • SC 13G/ACostar Group Inc10 Feb 2014
  • SC 13G/ACostar Group Inc11 Feb 2013
  • SC 13G/ACostar Group Inc8 Feb 2012
  • SC 13G/ACostar Group Inc9 Feb 2011
  • SC 13G/ACostar Group Inc9 Feb 2010
  • SC 13G/ACostar Group Inc9 Feb 2009
  • SC 13G/ACostar Group Inc31 Jan 2008
  • SC 13GCostar Group Inc9 Feb 2007

Winslow Capital Management, LLC(7)

  • SC 13GCostar Group Inc13 Feb 2019
  • SC 13G/ACostar Group Inc13 Feb 2019
  • SC 13GCostar Group Inc14 Feb 2018
  • SC 13GCostar Group Inc13 Feb 2017
  • SC 13GCostar Group Inc1 Feb 2016
  • SC 13GCostar Group Inc5 Feb 2015
  • SC 13GCostar Group Inc17 Dec 2014

CAPITAL GROUP INTERNATIONAL INC(7)

  • SC 13G/ACostar Group Inc13 Feb 2004
  • SC 13G/ACostar Group Inc10 Dec 2003
  • SC 13G/ACostar Group Inc11 Feb 2003
  • SC 13G/ACostar Group Inc14 Feb 2002
  • SC 13G/ACostar Group Inc12 Feb 2001
  • SC 13G/ACostar Group Inc8 Sep 2000
  • SC 13GCostar Group Inc15 Feb 2000

FMR LLC(6)

  • SC 13G/ACostar Group Inc16 Feb 2010
  • SC 13G/ACostar Group Inc17 Feb 2009
  • SC 13G/ACostar Group Inc10 Dec 2008
  • SC 13G/ACostar Group Inc14 Feb 2008
  • SC 13G/ACostar Group Inc10 Apr 2007
  • SC 13GCostar Group Inc14 Feb 2007

WADDELL & REED FINANCIAL INC(5)

  • SC 13G/ACostar Group Inc12 Feb 2010
  • SC 13G/ACostar Group Inc4 Feb 2009
  • SC 13G/ACostar Group Inc1 Feb 2008
  • SC 13G/ACostar Group Inc9 Feb 2007
  • SC 13GCostar Group Inc1 Feb 2006

WELLS FARGO & COMPANY/MN(4)

  • SC 13G/ACostar Group Inc11 Feb 2016
  • SC 13GCostar Group Inc29 Jan 2016
  • SC 13G/ACostar Group Inc10 Mar 2015
  • SC 13GCostar Group Inc10 Feb 2015

WELLINGTON MANAGEMENT GROUP LLP(4)

  • SC 13G/ACostar Group Inc12 Feb 2019
  • SC 13GCostar Group Inc8 Feb 2018
  • SC 13G/ACostar Group Inc9 Feb 2017
  • SC 13GCostar Group Inc11 Feb 2016

BROWN INVESTMENT ADVISORY & TRUST CO(4)

  • SC 13G/ACostar Group Inc15 Feb 2005
  • SC 13GCostar Group Inc13 Feb 2004
  • SC 13GCostar Group Inc14 Feb 2003
  • SC 13GCostar Group Inc8 Mar 2002

TRANSAMERICA INVESTMENT MANAGEMENT LLC(3)

  • SC 13G/ACostar Group Inc8 Oct 2008
  • SC 13G/ACostar Group Inc14 Feb 2008
  • SC 13GCostar Group Inc13 Feb 2007

FEDERATED INVESTORS INC /PA/(3)

  • SC 13G/ACostar Group Inc9 Jan 2009
  • SC 13G/ACostar Group Inc13 Feb 2008
  • SC 13GCostar Group Inc13 Feb 2007

KERN CAPITAL MANAGEMENT LLC(3)

  • SC 13G/ACostar Group Inc14 Feb 2005
  • SC 13G/ACostar Group Inc13 Feb 2004
  • SC 13G/ACostar Group Inc14 Feb 2003

KLEIN MICHAEL R(3)

  • SC 13D/ACostar Group Inc7 Jul 2006
  • SC 13D/ACostar Group Inc23 Feb 2000
  • SC 13DRealty Information Group Inc17 Jul 1998

DARUMA ASSET MANAGEMENT INC /NY(3)

  • SC 13G/ACostar Group Inc14 Feb 2012
  • SC 13G/ACostar Group Inc14 Feb 2011
  • SC 13GCostar Group Inc16 Feb 2010

JANUS HENDERSON GROUP PLC(3)

  • SC 13G/ACostar Group, Inc.14 Feb 2020
  • SC 13G/ACostar Group Inc12 Feb 2019
  • SC 13GCostar Group Inc13 Feb 2018

SELIGMAN J & W & CO INC /NY/(2)

  • SC 13G/ACostar Group Inc18 Jul 2000
  • SC 13GCostar Group Inc10 Feb 2000

SCUDDER KEMPER INVESTMENTS INC(2)

  • SC 13G/ACostar Group Inc1 Feb 2002
  • SC 13GCostar Group Inc21 Mar 2001

BONDERMAN DAVID(2)

  • SC 13D/ACostar Group Inc10 Mar 2000
  • SC 13DRealty Information Group Inc16 Jul 1998

KORNITZER CAPITAL MANAGEMENT INC /KS(2)

  • SC 13G/ACostar Group Inc20 Jan 2012
  • SC 13GCostar Group Inc21 Jan 2011

DEUTSCHE BANK AG\(2)

  • SC 13G/ACostar Group Inc17 Feb 2004
  • SC 13G/ACostar Group Inc12 Feb 2003

KERN CAPITAL MANAGEMENT LLC /ADV(2)

  • SC 13G/ACostar Group Inc14 Feb 2002
  • SC 13GCostar Group Inc9 Feb 2001

STANDISH AYER & WOOD INC/MA(2)

  • SC 13GCostar Group Inc16 Feb 2001
  • SC 13GCostar Group Inc9 Feb 2000

FLORANCE ANDREW C(2)

  • SC 13D/ACostar Group Inc10 Mar 2000
  • SC 13DRealty Information Group Inc16 Jul 1998

FOUNDERS RIG LLC(2)

  • SC 13D/ACostar Group Inc19 Oct 1999
  • SC 13DRealty Information Group Inc20 Jul 1998

CHILTON INVESTMENT CO INC(2)

  • SC 13G/ACostar Group Inc14 Feb 2005
  • SC 13GCostar Group Inc10 Nov 2003

ALLIANCEBERNSTEIN L.P.(2)

  • SC 13G/ACostar Group Inc13 Feb 2013
  • SC 13GCostar Group Inc13 Feb 2012

NEXT CENTURY GROWTH INVESTORS LLC(2)

  • SC 13G/ACostar Group Inc14 Feb 2007
  • SC 13GCostar Group Inc14 Feb 2006

CAPITAL GUARDIAN TRUST CO(1)

  • SC 13G/ACostar Group Inc14 Feb 2005

GRUBER & MCBAINE CAPITAL MANAGEMENT LLC(1)

  • SC 13DRealty Information Group Inc29 Apr 1999

BARCLAYS GLOBAL INVESTORS NA /CA/(1)

  • SC 13GCostar Group Inc5 Feb 2009

COSTAR GROUP INC(1)

  • SC 13DLoopNet, Inc.6 May 2011

BlackRock, Inc.(1)

  • SC 13G/ACostar Group, Inc.23 Apr 2025

VANGUARD CAPITAL MANAGEMENT LLC(1)

  • SC 13GCostar Group, Inc.29 Apr

VANGUARD PORTFOLIO MANAGEMENT LLC(1)

  • SC 13GCostar Group, Inc.29 Apr

Insider Ownership

FLORANCE ANDREW C(130)

  • Form 4Statement of changes in beneficial ownership5 Aug
  • Form 4Statement of changes in beneficial ownership4 May
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership2 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership7 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Feb 2025

Ruggles Lisa(52)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership3 Jun 2025
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Feb 2025
  • Form 4Statement of changes in beneficial ownership24 Feb 2025
  • Form 4Statement of changes in beneficial ownership4 Jun 2024

KLEIN MICHAEL R(46)

  • Form 4Statement of changes in beneficial ownership12 Dec 2024
  • Form 4Statement of changes in beneficial ownership28 Oct 2024
  • Form 4Statement of changes in beneficial ownership30 Jul 2024
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Dec 2023
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership25 May 2023
  • Form 5Annual statement of beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership9 Aug 2022

CARCHEDI FRANCIS(46)

  • Form 4Statement of changes in beneficial ownership2 Oct 2018
  • Form 4Statement of changes in beneficial ownership31 Jul 2018
  • Form 4Statement of changes in beneficial ownership3 Apr 2018
  • Form 4Statement of changes in beneficial ownership13 Mar 2018
  • Form 4Statement of changes in beneficial ownership9 Mar 2018
  • Form 4Statement of changes in beneficial ownership6 Mar 2018
  • Form 4Statement of changes in beneficial ownership1 Mar 2018
  • Form 4Statement of changes in beneficial ownership3 May 2017
  • Form 4Statement of changes in beneficial ownership14 Mar 2017
  • Form 4Statement of changes in beneficial ownership7 Mar 2017

Wheeler Scott T(45)

  • Form 4Statement of changes in beneficial ownership30 Apr 2024
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership14 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024
  • Form 4Statement of changes in beneficial ownership26 Feb 2024
  • Form 4Statement of changes in beneficial ownership20 Feb 2024
  • Form 4Statement of changes in beneficial ownership30 Jun 2023
  • Form 4Statement of changes in beneficial ownership14 Jun 2023
  • Form 4Statement of changes in beneficial ownership5 May 2023
  • Form 4Statement of changes in beneficial ownership17 Mar 2023

Radecki Brian J(44)

  • Form 4Statement of changes in beneficial ownership13 Mar 2015
  • Form 4Statement of changes in beneficial ownership9 Mar 2015
  • Form 4Statement of changes in beneficial ownership3 Mar 2015
  • Form 4Statement of changes in beneficial ownership24 Feb 2015
  • Form 4PRIMARY DOCUMENT11 Mar 2014
  • Form 4PRIMARY DOCUMENT6 Mar 2014
  • Form 4PRIMARY DOCUMENT4 Mar 2014
  • Form 4PRIMARY DOCUMENT25 Feb 2014
  • Form 4PRIMARY DOCUMENT24 Dec 2013
  • Form 4PRIMARY DOCUMENT22 Nov 2013

Stanfill John L(38)

  • Form 4PRIMARY DOCUMENT12 Mar 2014
  • Form 4PRIMARY DOCUMENT6 Mar 2014
  • Form 4PRIMARY DOCUMENT4 Mar 2014
  • Form 4PRIMARY DOCUMENT25 Feb 2014
  • Form 4PRIMARY DOCUMENT13 Nov 2013
  • Form 4PRIMARY DOCUMENT13 Mar 2013
  • Form 4PRIMARY DOCUMENT6 Mar 2013
  • Form 4PRIMARY DOCUMENT25 Feb 2013
  • Form 4PRIMARY DOCUMENT6 Sep 2012
  • Form 4PRIMARY DOCUMENT8 May 2012

Hill John W(35)

  • Form 4Statement of changes in beneficial ownership10 Aug
  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership17 Nov 2025
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership12 Dec 2024
  • Form 4Statement of changes in beneficial ownership1 Aug 2024
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership29 Nov 2023
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership28 Jun 2023

NASSETTA CHRISTOPHER J(33)

  • Form 4Statement of changes in beneficial ownership2 Dec 2024
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership9 May 2024
  • Form 4Statement of changes in beneficial ownership9 Nov 2023
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership12 Nov 2021
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 4Statement of changes in beneficial ownership28 Oct 2019

Kitchen Jennifer(32)

  • Form 4PRIMARY DOCUMENT11 Sep 2013
  • Form 4PRIMARY DOCUMENT13 Mar 2013
  • Form 4PRIMARY DOCUMENT6 Mar 2013
  • Form 4PRIMARY DOCUMENT25 Feb 2013
  • Form 4PRIMARY DOCUMENT13 Sep 2012
  • Form 4PRIMARY DOCUMENT8 May 2012
  • Form 4PRIMARY DOCUMENT13 Mar 2012
  • Form 4PRIMARY DOCUMENT6 Mar 2012
  • Form 4PRIMARY DOCUMENT23 Feb 2012
  • Form 4PRIMARY DOCUMENT1 Jun 2011

Linnington Matthew(31)

  • Form 4Statement of changes in beneficial ownership13 Aug 2020
  • Form 4Statement of changes in beneficial ownership2 Apr 2020
  • Form 4Statement of changes in beneficial ownership3 Mar 2020
  • Form 4Statement of changes in beneficial ownership19 Feb 2020
  • Form 4Statement of changes in beneficial ownership10 Feb 2020
  • Form 4Statement of changes in beneficial ownership1 Aug 2019
  • Form 4Statement of changes in beneficial ownership3 Jun 2019
  • Form 4Statement of changes in beneficial ownership2 Apr 2019
  • Form 4Statement of changes in beneficial ownership12 Mar 2019
  • Form 4Statement of changes in beneficial ownership4 Mar 2019

Marples Paul(30)

  • Form 4PRIMARY DOCUMENT1 Aug 2012
  • Form 4PRIMARY DOCUMENT15 May 2012
  • Form 4PRIMARY DOCUMENT13 Mar 2012
  • Form 4PRIMARY DOCUMENT6 Mar 2012
  • Form 4PRIMARY DOCUMENT23 Feb 2012
  • Form 4PRIMARY DOCUMENT2 Aug 2011
  • Form 4PRIMARY DOCUMENT1 Jun 2011
  • Form 4PRIMARY DOCUMENT4 May 2011
  • Form 4PRIMARY DOCUMENT14 Mar 2011
  • Form 4PRIMARY DOCUMENT8 Mar 2011

SAINT FREDERICK G.(28)

  • Form 4Statement of changes in beneficial ownership4 Aug
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership2 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2025
  • Form 4Statement of changes in beneficial ownership29 Jul 2025
  • Form 4Statement of changes in beneficial ownership12 Jun 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025

HABER WARREN H(21)

  • Form 4Statement of changes in beneficial ownership24 Sep 2018
  • Form 4Statement of changes in beneficial ownership14 Sep 2017
  • Form 4Statement of changes in beneficial ownership15 Sep 2016
  • Form 4Statement of changes in beneficial ownership11 Sep 2015
  • Form 4Statement of changes in beneficial ownership15 Sep 2014
  • Form 4PRIMARY DOCUMENT21 Aug 2014
  • Form 4PRIMARY DOCUMENT23 Sep 2013
  • Form 4PRIMARY DOCUMENT22 Aug 2013
  • Form 4PRIMARY DOCUMENT1 Oct 2012
  • Form 4PRIMARY DOCUMENT12 Jun 2012

DESMARAIS MICHAEL J(21)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership7 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership27 Nov 2024
  • Form 4Statement of changes in beneficial ownership30 Apr 2024
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024

Glosserman Michael J(19)

  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 4Statement of changes in beneficial ownership2 Jan 2020
  • Form 4Statement of changes in beneficial ownership23 Sep 2019
  • Form 4Statement of changes in beneficial ownership24 Sep 2018
  • Form 4Statement of changes in beneficial ownership14 Sep 2017
  • Form 4Statement of changes in beneficial ownership15 Sep 2016
  • Form 4Statement of changes in beneficial ownership2 Aug 2016

BONDERMAN DAVID(17)

  • Form 4Statement of changes in beneficial ownership15 Sep 2014
  • Form 4PRIMARY DOCUMENT14 Aug 2014
  • Form 4PRIMARY DOCUMENT23 Sep 2013
  • Form 4PRIMARY DOCUMENT22 Aug 2013
  • Form 4PRIMARY DOCUMENT1 Oct 2012
  • Form 4PRIMARY DOCUMENT30 May 2012
  • Form 4PRIMARY DOCUMENT14 Sep 2011
  • Form 4PRIMARY DOCUMENT12 Sep 2011
  • Form 4PRIMARY DOCUMENT7 Sep 2010
  • Form 4PRIMARY DOCUMENT1 Apr 2010

SIMURO FRANK(17)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership23 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Feb 2025
  • Form 4Statement of changes in beneficial ownership24 Feb 2025
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024

Cann Cynthia Cammett(16)

  • Form 4Statement of changes in beneficial ownership10 Aug
  • Form 4Statement of changes in beneficial ownership4 Aug
  • Form 4Statement of changes in beneficial ownership16 Jun
  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership17 Nov 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2025
  • Form 4Statement of changes in beneficial ownership29 Jul 2025
  • Form 4Statement of changes in beneficial ownership17 Jun 2025

Tully Christopher(14)

  • Form 4PRIMARY DOCUMENT29 May 2008
  • Form 4PRIMARY DOCUMENT29 Apr 2008
  • Form 4PRIMARY DOCUMENT21 Apr 2008
  • Form 4PRIMARY DOCUMENT11 Mar 2008
  • Form 4PRIMARY DOCUMENT29 Feb 2008
  • Form 4PRIMARY DOCUMENT1 May 2007
  • Form 4PRIMARY DOCUMENT18 Apr 2007
  • Form 4PRIMARY DOCUMENT13 Mar 2007
  • Form 4PRIMARY DOCUMENT14 Dec 2006
  • Form 4PRIMARY DOCUMENT1 May 2006

Kaplan Laura Cox(13)

  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership8 Nov 2021
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership3 May 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 4Statement of changes in beneficial ownership19 Nov 2019
  • Form 4Statement of changes in beneficial ownership23 Sep 2019
  • Form 4Statement of changes in beneficial ownership24 Sep 2018

Boxer Gene(13)

  • Form 4Statement of changes in beneficial ownership17 Mar
  • Form 4/AStatement of changes in beneficial ownership (amendment)17 Mar
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership18 Mar 2025
  • Form 4Statement of changes in beneficial ownership7 Mar 2025
  • Form 4Statement of changes in beneficial ownership3 Mar 2025
  • Form 4Statement of changes in beneficial ownership19 Mar 2024
  • Form 4Statement of changes in beneficial ownership5 Mar 2024
  • Form 4Statement of changes in beneficial ownership26 Feb 2024

FARRINGTON CRAIG(12)

  • Form 4PRIMARY DOCUMENT1 May 2007
  • Form 4PRIMARY DOCUMENT18 Apr 2007
  • Form 4PRIMARY DOCUMENT13 Mar 2007
  • Form 4PRIMARY DOCUMENT14 Dec 2006
  • Form 4PRIMARY DOCUMENT5 Dec 2006
  • Form 4PRIMARY DOCUMENT1 May 2006
  • Form 4PRIMARY DOCUMENT16 Mar 2006
  • Form 4PRIMARY DOCUMENT14 Mar 2006
  • Form 4PRIMARY DOCUMENT8 Jun 2005
  • Form 4PRIMARY DOCUMENT14 Mar 2005

Steinberg David Jay(12)

  • Form 4Statement of changes in beneficial ownership5 Mar 2020
  • Form 4Statement of changes in beneficial ownership23 Sep 2019
  • Form 4Statement of changes in beneficial ownership24 Sep 2018
  • Form 4Statement of changes in beneficial ownership14 Sep 2017
  • Form 4Statement of changes in beneficial ownership15 Sep 2016
  • Form 4Statement of changes in beneficial ownership11 Sep 2015
  • Form 4Statement of changes in beneficial ownership16 Jun 2015
  • Form 4Statement of changes in beneficial ownership15 Sep 2014
  • Form 4PRIMARY DOCUMENT23 Sep 2013
  • Form 4PRIMARY DOCUMENT1 Oct 2012

LOW JOSIAH O III(9)

  • Form 4PRIMARY DOCUMENT7 Sep 2010
  • Form 4PRIMARY DOCUMENT1 Jun 2010
  • Form 4PRIMARY DOCUMENT8 Dec 2009
  • Form 4PRIMARY DOCUMENT4 Sep 2008
  • Form 4PRIMARY DOCUMENT18 Sep 2007
  • Form 4PRIMARY DOCUMENT26 Oct 2006
  • Form 4PRIMARY DOCUMENT11 Oct 2005
  • Form 4PRIMARY DOCUMENT9 Sep 2004
  • Form 4PRIMARY DOCUMENT4 Sep 2003

Sams Louise S(9)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership9 Mar
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 3Initial statement of beneficial ownership20 Dec 2019

Musslewhite Robert W(8)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 4Statement of changes in beneficial ownership15 Sep 2022
  • Form 4Statement of changes in beneficial ownership17 Sep 2021
  • Form 4Statement of changes in beneficial ownership25 Sep 2020
  • Form 3Initial statement of beneficial ownership23 Dec 2019

LOWN CHRISTIAN M.(8)

  • Form 4Statement of changes in beneficial ownership6 Jul
  • Form 4Statement of changes in beneficial ownership11 Mar
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership2 Jul 2025
  • Form 4Statement of changes in beneficial ownership24 Feb 2025
  • Form 3Initial statement of beneficial ownership3 Jul 2024
  • Form 4/AStatement of changes in beneficial ownership (amendment)5 Aug 2024
  • Form 4Statement of changes in beneficial ownership3 Jul 2024

Reynolds Catherine B(5)

  • Form 4PRIMARY DOCUMENT18 Sep 2007
  • Form 4PRIMARY DOCUMENT26 Oct 2006
  • Form 4PRIMARY DOCUMENT11 Oct 2005
  • Form 4PRIMARY DOCUMENT9 Sep 2004
  • Form 3PRIMARY DOCUMENT16 Jun 2004

Brunner Angelique G.(5)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 4Statement of changes in beneficial ownership5 Aug 2024
  • Form 4Statement of changes in beneficial ownership1 Nov 2023
  • Form 3Initial statement of beneficial ownership2 Aug 2023

McCarthy Christine M(4)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 3Initial statement of beneficial ownership14 Apr 2025
  • Form 3/AInitial statement of beneficial ownership (amendment)2 Apr

Glaser Rachel C(4)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership3 Mar
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 3Initial statement of beneficial ownership14 Apr 2025

SCHAFFEL DAVID M(3)

  • Form 4PRIMARY DOCUMENT14 Mar 2005
  • Form 4PRIMARY DOCUMENT2 Mar 2004
  • Form 4PRIMARY DOCUMENT25 Sep 2003

BERISFORD JOHN L(3)

  • Form 4Statement of changes in beneficial ownership24 Jun
  • Form 4Statement of changes in beneficial ownership11 Sep 2025
  • Form 3Initial statement of beneficial ownership14 Apr 2025

Rossmann Robin Jack(3)

  • Form 4Statement of changes in beneficial ownership16 Oct
  • Form 4Statement of changes in beneficial ownership4 Aug
  • Form 3Initial statement of beneficial ownership4 Aug

ARABE MICHAEL D(2)

  • Form 4PRIMARY DOCUMENT2 Mar 2004
  • Form 4PRIMARY DOCUMENT25 Sep 2003

Harding Catrina(2)

  • Form 4Statement of changes in beneficial ownership10 Nov
  • Form 3Initial statement of beneficial ownership10 Nov

COSTAR GROUP INC(1)

  • Form 3Initial statement of beneficial ownership6 May 2011

FOUNDERS RIG LLC(1)

  • Form 3Initial statement of beneficial ownership17 Jul 1998

Yinger Scott L(1)

  • Form 3Initial statement of beneficial ownership11 Aug 2015

Banerjee Nana(1)

  • Form 3Initial statement of beneficial ownership17 Mar

โ‰ฅ5% Ownership

BAMCO INC /NY/(17)

  • SC 13GCostar Group, Inc.14 Aug
  • SC 13G/ACostar Group, Inc.12 Feb 2021
  • SC 13G/ACostar Group, Inc.14 Feb 2020
  • SC 13G/ACostar Group Inc14 Feb 2019
  • SC 13G/ACostar Group Inc14 Feb 2018
  • SC 13G/ACostar Group Inc14 Feb 2017
  • SC 13G/ACostar Group Inc16 Feb 2016
  • SC 13G/ACostar Group Inc17 Feb 2015
  • SC 13G/ACostar Group Inc14 Feb 2014
  • SC 13G/ACostar Group Inc14 Feb 2013

VANGUARD GROUP INC(14)

  • SC 13G/ACostar Group, Inc.26 Mar
  • SC 13G/ACostar Group, Inc.13 Feb 2024
  • SC 13G/ACostar Group, Inc.9 Feb 2023
  • SC 13G/ACostar Group, Inc.11 Oct 2022
  • SC 13G/ACostar Group, Inc.9 Feb 2022
  • SC 13G/ACostar Group, Inc.10 Feb 2021
  • SC 13G/ACostar Group, Inc.12 Feb 2020
  • SC 13G/ACostar Group Inc11 Feb 2019
  • SC 13G/ACostar Group Inc9 Feb 2018
  • SC 13G/ACostar Group Inc10 Feb 2017

BlackRock Inc.(14)

  • SC 13G/ACostar Group, Inc.25 Jan 2024
  • SC 13G/ACostar Group, Inc.30 Jan 2023
  • SC 13G/ACostar Group, Inc.1 Feb 2022
  • SC 13G/ACostar Group, Inc.29 Jan 2021
  • SC 13G/ACostar Group, Inc.5 Feb 2020
  • SC 13GCostar Group Inc8 Feb 2019
  • SC 13G/ACostar Group Inc10 Jul 2014
  • SC 13G/ACostar Group Inc28 Jan 2014
  • SC 13G/ACostar Group Inc6 Feb 2013
  • SC 13GCostar Group Inc9 Feb 2012

JANUS CAPITAL MANAGEMENT LLC(13)

  • SC 13G/ACostar Group Inc13 Feb 2018
  • SC 13G/ACostar Group Inc13 Feb 2017
  • SC 13GCostar Group Inc16 Feb 2016
  • SC 13G/ACostar Group Inc31 Jan 2013
  • SC 13G/ACostar Group Inc14 Feb 2012
  • SC 13G/ACostar Group Inc14 Feb 2011
  • SC 13G/ACostar Group Inc16 Feb 2010
  • SC 13G/ACostar Group Inc17 Feb 2009
  • SC 13G/ACostar Group Inc12 Nov 2008
  • SC 13G/ACostar Group Inc14 Feb 2008

PRICE T ROWE ASSOCIATES INC /MD/(10)

  • SC 13G/ACostar Group, Inc.14 Feb 2023
  • SC 13G/ACostar Group, Inc.14 Feb 2022
  • SC 13G/ACostar Group, Inc.16 Feb 2021
  • SC 13G/ACostar Group, Inc.14 Feb 2020
  • SC 13G/ACostar Group, Inc.10 Dec 2019
  • SC 13G/ACostar Group Inc14 Feb 2019
  • SC 13GCostar Group Inc14 Feb 2018
  • SC 13G/ACostar Group Inc8 Feb 2013
  • SC 13G/ACostar Group Inc8 Feb 2012
  • SC 13GCostar Group Inc9 Feb 2011

MORGAN STANLEY(8)

  • SC 13G/ACostar Group Inc13 Feb 2013
  • SC 13G/ACostar Group Inc8 Feb 2012
  • SC 13G/ACostar Group Inc9 Feb 2011
  • SC 13G/ACostar Group Inc12 Feb 2010
  • SC 13G/ACostar Group Inc17 Feb 2009
  • SC 13G/ACostar Group Inc14 Feb 2008
  • SC 13G/ACostar Group Inc10 Sep 2007
  • SC 13GCostar Group Inc15 Feb 2007

TimesSquare Capital Management, LLC(8)

  • SC 13G/ACostar Group Inc10 Feb 2014
  • SC 13G/ACostar Group Inc11 Feb 2013
  • SC 13G/ACostar Group Inc8 Feb 2012
  • SC 13G/ACostar Group Inc9 Feb 2011
  • SC 13G/ACostar Group Inc9 Feb 2010
  • SC 13G/ACostar Group Inc9 Feb 2009
  • SC 13G/ACostar Group Inc31 Jan 2008
  • SC 13GCostar Group Inc9 Feb 2007

Winslow Capital Management, LLC(7)

  • SC 13GCostar Group Inc13 Feb 2019
  • SC 13G/ACostar Group Inc13 Feb 2019
  • SC 13GCostar Group Inc14 Feb 2018
  • SC 13GCostar Group Inc13 Feb 2017
  • SC 13GCostar Group Inc1 Feb 2016
  • SC 13GCostar Group Inc5 Feb 2015
  • SC 13GCostar Group Inc17 Dec 2014

CAPITAL GROUP INTERNATIONAL INC(7)

  • SC 13G/ACostar Group Inc13 Feb 2004
  • SC 13G/ACostar Group Inc10 Dec 2003
  • SC 13G/ACostar Group Inc11 Feb 2003
  • SC 13G/ACostar Group Inc14 Feb 2002
  • SC 13G/ACostar Group Inc12 Feb 2001
  • SC 13G/ACostar Group Inc8 Sep 2000
  • SC 13GCostar Group Inc15 Feb 2000

FMR LLC(6)

  • SC 13G/ACostar Group Inc16 Feb 2010
  • SC 13G/ACostar Group Inc17 Feb 2009
  • SC 13G/ACostar Group Inc10 Dec 2008
  • SC 13G/ACostar Group Inc14 Feb 2008
  • SC 13G/ACostar Group Inc10 Apr 2007
  • SC 13GCostar Group Inc14 Feb 2007

WADDELL & REED FINANCIAL INC(5)

  • SC 13G/ACostar Group Inc12 Feb 2010
  • SC 13G/ACostar Group Inc4 Feb 2009
  • SC 13G/ACostar Group Inc1 Feb 2008
  • SC 13G/ACostar Group Inc9 Feb 2007
  • SC 13GCostar Group Inc1 Feb 2006

WELLS FARGO & COMPANY/MN(4)

  • SC 13G/ACostar Group Inc11 Feb 2016
  • SC 13GCostar Group Inc29 Jan 2016
  • SC 13G/ACostar Group Inc10 Mar 2015
  • SC 13GCostar Group Inc10 Feb 2015

WELLINGTON MANAGEMENT GROUP LLP(4)

  • SC 13G/ACostar Group Inc12 Feb 2019
  • SC 13GCostar Group Inc8 Feb 2018
  • SC 13G/ACostar Group Inc9 Feb 2017
  • SC 13GCostar Group Inc11 Feb 2016

BROWN INVESTMENT ADVISORY & TRUST CO(4)

  • SC 13G/ACostar Group Inc15 Feb 2005
  • SC 13GCostar Group Inc13 Feb 2004
  • SC 13GCostar Group Inc14 Feb 2003
  • SC 13GCostar Group Inc8 Mar 2002

TRANSAMERICA INVESTMENT MANAGEMENT LLC(3)

  • SC 13G/ACostar Group Inc8 Oct 2008
  • SC 13G/ACostar Group Inc14 Feb 2008
  • SC 13GCostar Group Inc13 Feb 2007

FEDERATED INVESTORS INC /PA/(3)

  • SC 13G/ACostar Group Inc9 Jan 2009
  • SC 13G/ACostar Group Inc13 Feb 2008
  • SC 13GCostar Group Inc13 Feb 2007

KERN CAPITAL MANAGEMENT LLC(3)

  • SC 13G/ACostar Group Inc14 Feb 2005
  • SC 13G/ACostar Group Inc13 Feb 2004
  • SC 13G/ACostar Group Inc14 Feb 2003

KLEIN MICHAEL R(3)

  • SC 13D/ACostar Group Inc7 Jul 2006
  • SC 13D/ACostar Group Inc23 Feb 2000
  • SC 13DRealty Information Group Inc17 Jul 1998

DARUMA ASSET MANAGEMENT INC /NY(3)

  • SC 13G/ACostar Group Inc14 Feb 2012
  • SC 13G/ACostar Group Inc14 Feb 2011
  • SC 13GCostar Group Inc16 Feb 2010

JANUS HENDERSON GROUP PLC(3)

  • SC 13G/ACostar Group, Inc.14 Feb 2020
  • SC 13G/ACostar Group Inc12 Feb 2019
  • SC 13GCostar Group Inc13 Feb 2018

SELIGMAN J & W & CO INC /NY/(2)

  • SC 13G/ACostar Group Inc18 Jul 2000
  • SC 13GCostar Group Inc10 Feb 2000

SCUDDER KEMPER INVESTMENTS INC(2)

  • SC 13G/ACostar Group Inc1 Feb 2002
  • SC 13GCostar Group Inc21 Mar 2001

BONDERMAN DAVID(2)

  • SC 13D/ACostar Group Inc10 Mar 2000
  • SC 13DRealty Information Group Inc16 Jul 1998

KORNITZER CAPITAL MANAGEMENT INC /KS(2)

  • SC 13G/ACostar Group Inc20 Jan 2012
  • SC 13GCostar Group Inc21 Jan 2011

DEUTSCHE BANK AG\(2)

  • SC 13G/ACostar Group Inc17 Feb 2004
  • SC 13G/ACostar Group Inc12 Feb 2003

KERN CAPITAL MANAGEMENT LLC /ADV(2)

  • SC 13G/ACostar Group Inc14 Feb 2002
  • SC 13GCostar Group Inc9 Feb 2001

STANDISH AYER & WOOD INC/MA(2)

  • SC 13GCostar Group Inc16 Feb 2001
  • SC 13GCostar Group Inc9 Feb 2000

FLORANCE ANDREW C(2)

  • SC 13D/ACostar Group Inc10 Mar 2000
  • SC 13DRealty Information Group Inc16 Jul 1998

FOUNDERS RIG LLC(2)

  • SC 13D/ACostar Group Inc19 Oct 1999
  • SC 13DRealty Information Group Inc20 Jul 1998

CHILTON INVESTMENT CO INC(2)

  • SC 13G/ACostar Group Inc14 Feb 2005
  • SC 13GCostar Group Inc10 Nov 2003

ALLIANCEBERNSTEIN L.P.(2)

  • SC 13G/ACostar Group Inc13 Feb 2013
  • SC 13GCostar Group Inc13 Feb 2012

NEXT CENTURY GROWTH INVESTORS LLC(2)

  • SC 13G/ACostar Group Inc14 Feb 2007
  • SC 13GCostar Group Inc14 Feb 2006

CAPITAL GUARDIAN TRUST CO(1)

  • SC 13G/ACostar Group Inc14 Feb 2005

GRUBER & MCBAINE CAPITAL MANAGEMENT LLC(1)

  • SC 13DRealty Information Group Inc29 Apr 1999

BARCLAYS GLOBAL INVESTORS NA /CA/(1)

  • SC 13GCostar Group Inc5 Feb 2009

COSTAR GROUP INC(1)

  • SC 13DLoopNet, Inc.6 May 2011

BlackRock, Inc.(1)

  • SC 13G/ACostar Group, Inc.23 Apr 2025

VANGUARD CAPITAL MANAGEMENT LLC(1)

  • SC 13GCostar Group, Inc.29 Apr

VANGUARD PORTFOLIO MANAGEMENT LLC(1)

  • SC 13GCostar Group, Inc.29 Apr