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QMCO US​

Quantum Corp /DE/(QMCO US)

$17.62+0.643.77%Ext:$17.54-0.080.47%(Market Closed · 23:55:48 UTC)

Overview

ProfileEntity Structure

Documents

SEC Filings
CategorizedChronologicalBy Owner

Financials & Metrics

FinancialsChartingShort InterestEmployees

SEC Filings by Owner

Insider Ownership

BRITTS WILLIAM C(49)

  • 4Statement of changes in beneficial ownership7 Feb 2018
  • 4Statement of changes in beneficial ownership7 Aug 2017
  • 4Statement of changes in beneficial ownership5 Jul 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership6 Feb 2017
  • 4Statement of changes in beneficial ownership8 Aug 2016
  • 4Statement of changes in beneficial ownership5 Jul 2016
  • 4Statement of changes in beneficial ownership8 Feb 2016
  • 4Statement of changes in beneficial ownership18 Nov 2015
  • 4Statement of changes in beneficial ownership6 Aug 2015

HALL SHAWN D(49)

  • 4Statement of changes in beneficial ownership12 Mar 2019
  • 4Statement of changes in beneficial ownership2 Mar 2018
  • 4Statement of changes in beneficial ownership5 Jul 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership3 Mar 2017
  • 4Statement of changes in beneficial ownership5 Jul 2016
  • 4Statement of changes in beneficial ownership2 Jul 2015
  • 4Statement of changes in beneficial ownership3 Jul 2014
  • 4Statement of changes in beneficial ownership6 Aug 2013
  • 4Statement of changes in beneficial ownership2 Jul 2013

BELLUZZO RICHARD(42)

  • 4Statement of changes in beneficial ownership16 Aug 2012
  • 4Statement of changes in beneficial ownership3 Jul 2012
  • 4Statement of changes in beneficial ownership4 Jun 2012
  • 4Statement of changes in beneficial ownership2 May 2012
  • 4Statement of changes in beneficial ownership3 Apr 2012
  • 4Statement of changes in beneficial ownership2 Mar 2012
  • 4Statement of changes in beneficial ownership2 Feb 2012
  • 4Statement of changes in beneficial ownership4 Jan 2012
  • 4Statement of changes in beneficial ownership2 Dec 2011
  • 4Statement of changes in beneficial ownership3 Nov 2011

GACEK JON W(36)

  • 4Statement of changes in beneficial ownership2 Oct 2017
  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership5 Jul 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership5 Jul 2016
  • 4Statement of changes in beneficial ownership3 Nov 2015
  • 4Statement of changes in beneficial ownership2 Jul 2015
  • 4Statement of changes in beneficial ownership3 Jul 2014
  • 4Statement of changes in beneficial ownership2 Apr 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013

Lerner James J(32)

  • 4Statement of changes in beneficial ownership23 Apr 2025
  • 4Statement of changes in beneficial ownership17 Jan 2025
  • 4/AStatement of changes in beneficial ownership (amendment)17 Jan 2025
  • 4Statement of changes in beneficial ownership5 Dec 2024
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4Statement of changes in beneficial ownership23 Apr 2024
  • 4Statement of changes in beneficial ownership12 Oct 2023
  • 4Statement of changes in beneficial ownership12 Jul 2023
  • 4Statement of changes in beneficial ownership12 Oct 2022

Moorehead Lewis W.(25)

  • 4Statement of changes in beneficial ownership23 Apr 2025
  • 3Initial statement of beneficial ownership14 Apr 2025
  • 4Statement of changes in beneficial ownership12 Oct 2022
  • 4Statement of changes in beneficial ownership12 Sep 2022
  • 4Statement of changes in beneficial ownership25 Jul 2022
  • 4/AStatement of changes in beneficial ownership (amendment)8 Jul 2022
  • 4Statement of changes in beneficial ownership6 Jul 2022
  • 4Statement of changes in beneficial ownership26 Apr 2022
  • 4Statement of changes in beneficial ownership10 Jan 2022
  • 4Statement of changes in beneficial ownership8 Nov 2021

DODSON J MICHAEL(24)

  • 4Statement of changes in beneficial ownership7 Oct 2022
  • 4Statement of changes in beneficial ownership12 Sep 2022
  • 4Statement of changes in beneficial ownership12 Jul 2022
  • 4Statement of changes in beneficial ownership6 Jul 2022
  • 4Statement of changes in beneficial ownership26 Apr 2022
  • 4Statement of changes in beneficial ownership10 Jan 2022
  • 4Statement of changes in beneficial ownership5 Oct 2021
  • 4Statement of changes in beneficial ownership13 Sep 2021
  • 4Statement of changes in beneficial ownership8 Jul 2021
  • 4Statement of changes in beneficial ownership14 Jun 2021

ESBER EDWARD M(20)

  • 4Statement of changes in beneficial ownership7 Apr 2011
  • 4Statement of changes in beneficial ownership16 Feb 2011
  • 4Statement of changes in beneficial ownership1 Sep 2010
  • 4Statement of changes in beneficial ownership12 Aug 2010
  • 4Statement of changes in beneficial ownership2 Aug 2010
  • 4Statement of changes in beneficial ownership2 Sep 2009
  • 4Statement of changes in beneficial ownership10 Aug 2009
  • 4Statement of changes in beneficial ownership10 Nov 2008
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership13 Aug 2008

RITTI PHILIP(20)

  • 4PRIMARY DOCUMENT24 Aug 2006
  • 4PRIMARY DOCUMENT8 Aug 2006
  • 4PRIMARY DOCUMENT3 Jul 2006
  • 4PRIMARY DOCUMENT3 Mar 2006
  • 4PRIMARY DOCUMENT8 Feb 2006
  • 4PRIMARY DOCUMENT3 Jan 2006
  • 4PRIMARY DOCUMENT10 Aug 2005
  • 4PRIMARY DOCUMENT6 Jul 2005
  • 4PRIMARY DOCUMENT29 Jun 2005
  • 4PRIMARY DOCUMENT3 Jun 2005

Cabrera Brian E(20)

  • 4Statement of changes in beneficial ownership23 Apr 2025
  • 4Statement of changes in beneficial ownership17 Jan 2025
  • 4/AStatement of changes in beneficial ownership (amendment)17 Jan 2025
  • 4Statement of changes in beneficial ownership5 Dec 2024
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4Statement of changes in beneficial ownership23 Apr 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership6 Oct 2023
  • 4Statement of changes in beneficial ownership12 Jul 2023

B. Riley Financial, Inc.(20)

  • 4Statement of changes in beneficial ownership29 Oct 2021
  • 4Statement of changes in beneficial ownership28 Apr 2021
  • 4Statement of changes in beneficial ownership24 Apr 2020
  • 4Statement of changes in beneficial ownership22 Apr 2020
  • 4Statement of changes in beneficial ownership17 Apr 2020
  • 4Statement of changes in beneficial ownership14 Apr 2020
  • 4Statement of changes in beneficial ownership8 Apr 2020
  • 4OWNERSHIP DOCUMENT31 Mar 2020
  • 4Statement of changes in beneficial ownership25 Mar 2020
  • 4OWNERSHIP DOCUMENT17 Mar 2020

CARROZZA ANTHONY(19)

  • 4PRIMARY DOCUMENT24 Aug 2006
  • 4PRIMARY DOCUMENT8 Aug 2006
  • 4PRIMARY DOCUMENT3 Jul 2006
  • 4PRIMARY DOCUMENT14 Feb 2006
  • 4PRIMARY DOCUMENT8 Feb 2006
  • 4PRIMARY DOCUMENT3 Jan 2006
  • 4PRIMARY DOCUMENT6 Jul 2005
  • 4PRIMARY DOCUMENT29 Jun 2005
  • 4PRIMARY DOCUMENT3 Jun 2005
  • 4PRIMARY DOCUMENT2 May 2005

BRC Partners Opportunity Fund, LP(19)

  • 4Statement of changes in beneficial ownership28 Apr 2021
  • 4Statement of changes in beneficial ownership24 Apr 2020
  • 4Statement of changes in beneficial ownership22 Apr 2020
  • 4Statement of changes in beneficial ownership17 Apr 2020
  • 4Statement of changes in beneficial ownership14 Apr 2020
  • 4Statement of changes in beneficial ownership8 Apr 2020
  • 4OWNERSHIP DOCUMENT31 Mar 2020
  • 4Statement of changes in beneficial ownership25 Mar 2020
  • 4OWNERSHIP DOCUMENT17 Mar 2020
  • 4OWNERSHIP DOCUMENT11 Mar 2020

B. RILEY CAPITAL MANAGEMENT, LLC(19)

  • 4Statement of changes in beneficial ownership28 Apr 2021
  • 4Statement of changes in beneficial ownership24 Apr 2020
  • 4Statement of changes in beneficial ownership22 Apr 2020
  • 4Statement of changes in beneficial ownership17 Apr 2020
  • 4Statement of changes in beneficial ownership14 Apr 2020
  • 4Statement of changes in beneficial ownership8 Apr 2020
  • 4OWNERSHIP DOCUMENT31 Mar 2020
  • 4Statement of changes in beneficial ownership25 Mar 2020
  • 4OWNERSHIP DOCUMENT17 Mar 2020
  • 4OWNERSHIP DOCUMENT11 Mar 2020

BRC Partners Management GP, LLC(19)

  • 4Statement of changes in beneficial ownership28 Apr 2021
  • 4Statement of changes in beneficial ownership24 Apr 2020
  • 4Statement of changes in beneficial ownership22 Apr 2020
  • 4Statement of changes in beneficial ownership17 Apr 2020
  • 4Statement of changes in beneficial ownership14 Apr 2020
  • 4Statement of changes in beneficial ownership8 Apr 2020
  • 4OWNERSHIP DOCUMENT31 Mar 2020
  • 4Statement of changes in beneficial ownership25 Mar 2020
  • 4OWNERSHIP DOCUMENT17 Mar 2020
  • 4OWNERSHIP DOCUMENT11 Mar 2020

Martella Donald E. Jr.(18)

  • 4Statement of changes in beneficial ownership26 Aug 2020
  • 4Statement of changes in beneficial ownership2 Jul 2020
  • 4/AStatement of changes in beneficial ownership (amendment)19 Mar 2020
  • 4Statement of changes in beneficial ownership19 Mar 2020
  • 4Statement of changes in beneficial ownership25 Feb 2020
  • 4Statement of changes in beneficial ownership10 Sep 2019
  • 4Statement of changes in beneficial ownership2 Jul 2019
  • 4Statement of changes in beneficial ownership12 Mar 2019
  • 4Statement of changes in beneficial ownership7 Aug 2017
  • 4Statement of changes in beneficial ownership5 Jul 2017

FETTER ELIZABETH A(16)

  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership6 Dec 2011
  • 4Statement of changes in beneficial ownership3 Nov 2011
  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 4Statement of changes in beneficial ownership8 Jul 2011
  • 4Statement of changes in beneficial ownership2 Jun 2011
  • 4Statement of changes in beneficial ownership3 May 2011
  • 4Statement of changes in beneficial ownership13 Apr 2011
  • 4Statement of changes in beneficial ownership1 Sep 2010
  • 4Statement of changes in beneficial ownership2 Sep 2009

FICHTHORN JOHN(16)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership8 Jun
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership29 Dec 2025
  • 4Statement of changes in beneficial ownership5 May 2025
  • 3Initial statement of beneficial ownership30 Apr 2025
  • 4/AStatement of changes in beneficial ownership (amendment)17 Aug 2021
  • 4Statement of changes in beneficial ownership16 Aug 2021
  • 4Statement of changes in beneficial ownership18 Dec 2020
  • 4Statement of changes in beneficial ownership3 Sep 2020

B. Riley Securities, Inc.(16)

  • 4Statement of changes in beneficial ownership29 Oct 2021
  • 4Statement of changes in beneficial ownership28 Apr 2021
  • 4Statement of changes in beneficial ownership24 Apr 2020
  • 4Statement of changes in beneficial ownership22 Apr 2020
  • 4Statement of changes in beneficial ownership17 Apr 2020
  • 4Statement of changes in beneficial ownership14 Apr 2020
  • 4OWNERSHIP DOCUMENT31 Mar 2020
  • 4Statement of changes in beneficial ownership25 Mar 2020
  • 4OWNERSHIP DOCUMENT17 Mar 2020
  • 4OWNERSHIP DOCUMENT11 Mar 2020

Auvil Paul R. III(15)

  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership3 Apr 2017
  • 4Statement of changes in beneficial ownership3 Mar 2017
  • 4Statement of changes in beneficial ownership6 Nov 2015
  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership2 Dec 2014
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership2 Sep 2011

BROWN MICHAEL A/CA(14)

  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 4Statement of changes in beneficial ownership1 Sep 2010
  • 4Statement of changes in beneficial ownership2 Sep 2009
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership30 Aug 2007
  • 4Statement of changes in beneficial ownership20 Aug 2007
  • 4PRIMARY DOCUMENT30 Aug 2006
  • 4PRIMARY DOCUMENT29 Sep 2005

BARRETT BARBARA(14)

  • 4Statement of changes in beneficial ownership1 Jul 2010
  • 4Statement of changes in beneficial ownership2 Jun 2010
  • 4Statement of changes in beneficial ownership6 Jul 2009
  • 4Statement of changes in beneficial ownership3 Jun 2009
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership1 Jul 2008
  • 4Statement of changes in beneficial ownership5 Sep 2007
  • 4Statement of changes in beneficial ownership3 Jul 2007
  • 4PRIMARY DOCUMENT24 Aug 2006
  • 4PRIMARY DOCUMENT3 Jul 2006

PARKER JESSE(14)

  • 3Initial statement of beneficial ownership9 Apr 2007
  • 4PRIMARY DOCUMENT24 Aug 2006
  • 4PRIMARY DOCUMENT3 Jul 2006
  • 4PRIMARY DOCUMENT3 Jan 2006
  • 4PRIMARY DOCUMENT6 Jul 2005
  • 4PRIMARY DOCUMENT29 Jun 2005
  • 4PRIMARY DOCUMENT3 Jun 2005
  • 4PRIMARY DOCUMENT2 May 2005
  • 4PRIMARY DOCUMENT24 Mar 2005
  • 4PRIMARY DOCUMENT12 Jan 2005

Clark Robert S.(14)

  • 4Statement of changes in beneficial ownership11 Jul 2017
  • 4Statement of changes in beneficial ownership5 Jul 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership5 Jul 2016
  • 4Statement of changes in beneficial ownership2 Jul 2015
  • 4Statement of changes in beneficial ownership3 Jul 2014
  • 4Statement of changes in beneficial ownership10 Feb 2014
  • 4Statement of changes in beneficial ownership2 Jul 2013
  • 4Statement of changes in beneficial ownership2 Apr 2013
  • 4Statement of changes in beneficial ownership3 Jul 2012

Nash Laura A.(14)

  • 4Statement of changes in beneficial ownership7 Jul
  • 4Statement of changes in beneficial ownership3 Apr
  • 4Statement of changes in beneficial ownership3 Oct 2025
  • 4Statement of changes in beneficial ownership17 Sep 2025
  • 4Statement of changes in beneficial ownership4 Apr 2025
  • 4/AStatement of changes in beneficial ownership (amendment)17 Jan 2025
  • 4Statement of changes in beneficial ownership5 Dec 2024
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4Statement of changes in beneficial ownership3 Apr 2024

Stedman Geoff G.(13)

  • 4Statement of changes in beneficial ownership7 Feb 2018
  • 4Statement of changes in beneficial ownership7 Aug 2017
  • 4Statement of changes in beneficial ownership5 Jul 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership6 Feb 2017
  • 4Statement of changes in beneficial ownership8 Aug 2016
  • 4Statement of changes in beneficial ownership6 Jul 2016
  • 4Statement of changes in beneficial ownership2 May 2016
  • 4Statement of changes in beneficial ownership8 Feb 2016
  • 4Statement of changes in beneficial ownership20 Nov 2015

Buchsbaum Thomas S(12)

  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 4Statement of changes in beneficial ownership1 Sep 2010
  • 4Statement of changes in beneficial ownership2 Sep 2009
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership30 Aug 2007
  • 4Statement of changes in beneficial ownership20 Aug 2007
  • 4PRIMARY DOCUMENT8 Sep 2006
  • 4PRIMARY DOCUMENT6 Sep 2006
  • 4PRIMARY DOCUMENT5 Sep 2006

Ahmad Fuad(12)

  • 4Statement of changes in beneficial ownership3 Apr 2018
  • 4Statement of changes in beneficial ownership20 Mar 2018
  • 4Statement of changes in beneficial ownership2 Mar 2018
  • 4Statement of changes in beneficial ownership7 Feb 2018
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 4Statement of changes in beneficial ownership18 Jul 2017
  • 4Statement of changes in beneficial ownership5 Jul 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership4 Apr 2017
  • 4Statement of changes in beneficial ownership3 Mar 2017

Smith Jeffrey C(11)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013

Rothman Marc E(11)

  • 4Statement of changes in beneficial ownership6 Sep 2022
  • 4/AStatement of changes in beneficial ownership (amendment)17 May 2022
  • 4Statement of changes in beneficial ownership26 Apr 2022
  • 4Statement of changes in beneficial ownership5 Oct 2021
  • 4Statement of changes in beneficial ownership16 Aug 2021
  • 4Statement of changes in beneficial ownership3 Sep 2020
  • 4Statement of changes in beneficial ownership9 Sep 2019
  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 3Initial statement of beneficial ownership4 May 2017

LOPATIN GERALD(11)

  • 4Statement of changes in beneficial ownership1 Jul 2010
  • 4Statement of changes in beneficial ownership2 Jun 2010
  • 4Statement of changes in beneficial ownership3 Mar 2010
  • 4Statement of changes in beneficial ownership2 Mar 2010
  • 4Statement of changes in beneficial ownership25 Feb 2010
  • 4Statement of changes in beneficial ownership19 Nov 2009
  • 4Statement of changes in beneficial ownership6 Jul 2009
  • 4Statement of changes in beneficial ownership3 Jun 2009
  • 4Statement of changes in beneficial ownership5 Sep 2008
  • 4Statement of changes in beneficial ownership1 Jul 2008

King Elizabeth(11)

  • 4Statement of changes in beneficial ownership8 Jul 2021
  • 4Statement of changes in beneficial ownership14 Jun 2021
  • 4Statement of changes in beneficial ownership19 May 2021
  • 4Statement of changes in beneficial ownership15 Apr 2021
  • 4Statement of changes in beneficial ownership17 Mar 2021
  • 4Statement of changes in beneficial ownership26 Aug 2020
  • 4Statement of changes in beneficial ownership2 Jul 2020
  • 4Statement of changes in beneficial ownership19 Mar 2020
  • 4Statement of changes in beneficial ownership15 Nov 2019
  • 4Statement of changes in beneficial ownership4 Oct 2019

KREIGLER GEORGE III(10)

  • 4PRIMARY DOCUMENT2 May 2005
  • 4PRIMARY DOCUMENT24 Mar 2005
  • 4PRIMARY DOCUMENT27 Jan 2005
  • 4PRIMARY DOCUMENT4 Feb 2005
  • 4PRIMARY DOCUMENT31 Aug 2004
  • 4PRIMARY DOCUMENT30 Jul 2004
  • 4PRIMARY DOCUMENT26 Jul 2004
  • 4PRIMARY DOCUMENT22 Jul 2004
  • 4PRIMARY DOCUMENT8 Jun 2004
  • 3PRIMARY DOCUMENT17 Feb 2004

Meyrath Hugues(10)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership7 Jul
  • 4Statement of changes in beneficial ownership3 Apr
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership4 Nov 2025
  • 4Statement of changes in beneficial ownership3 Oct 2025
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 3Initial statement of beneficial ownership28 Nov 2022
  • 4Statement of changes in beneficial ownership28 Nov 2022

Stinson Theodore A.(10)

  • 4Statement of changes in beneficial ownership2 Jul 2013
  • 4Statement of changes in beneficial ownership14 Jun 2013
  • 4Statement of changes in beneficial ownership6 Feb 2013
  • 4Statement of changes in beneficial ownership6 Aug 2012
  • 4Statement of changes in beneficial ownership3 Jul 2012
  • 4Statement of changes in beneficial ownership14 Jun 2012
  • 4Statement of changes in beneficial ownership14 Jun 2012
  • 4Statement of changes in beneficial ownership30 Jan 2012
  • 4Statement of changes in beneficial ownership4 Aug 2011
  • 3Initial statement of beneficial ownership16 Jun 2011

Gianella Kenneth P.(10)

  • 4Statement of changes in beneficial ownership5 Feb 2025
  • 4Statement of changes in beneficial ownership17 Jan 2025
  • 4Statement of changes in beneficial ownership5 Dec 2024
  • 4/AStatement of changes in beneficial ownership (amendment)17 Jan 2025
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4Statement of changes in beneficial ownership23 Apr 2024
  • 4Statement of changes in beneficial ownership5 Sep 2023
  • 4Statement of changes in beneficial ownership3 Feb 2023
  • 3Initial statement of beneficial ownership18 Jan 2023

EARHART ALAN L(9)

  • 4Statement of changes in beneficial ownership30 Aug 2007
  • 4Statement of changes in beneficial ownership20 Aug 2007
  • 4PRIMARY DOCUMENT30 Aug 2006
  • 4PRIMARY DOCUMENT28 Sep 2005
  • 4PRIMARY DOCUMENT14 Sep 2005
  • 4PRIMARY DOCUMENT29 Sep 2004
  • 4PRIMARY DOCUMENT18 Mar 2004
  • 4PRIMARY DOCUMENT26 Feb 2004
  • 4PRIMARY DOCUMENT23 Feb 2004

ROBERSON DAVID EARLE(9)

  • 4Statement of changes in beneficial ownership3 Apr 2017
  • 4Statement of changes in beneficial ownership3 Mar 2017
  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 4Statement of changes in beneficial ownership2 Jun 2011
  • 3Initial statement of beneficial ownership10 May 2011

MITCHELL MARK R(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Wold Jim(9)

  • 3Initial statement of beneficial ownership9 Apr 2007
  • 4PRIMARY DOCUMENT24 Aug 2006
  • 4PRIMARY DOCUMENT8 Aug 2006
  • 4PRIMARY DOCUMENT8 Feb 2006
  • 4PRIMARY DOCUMENT10 Aug 2005
  • 4PRIMARY DOCUMENT29 Jun 2005
  • 4PRIMARY DOCUMENT3 Jun 2005
  • 3PRIMARY DOCUMENT3 Feb 2005
  • 3/APRIMARY DOCUMENT13 Apr 2005

STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Feld Peter A(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Starboard Value LP(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Starboard Value GP LLC(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Starboard Principal Co LP(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Starboard Principal Co GP LLC(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

STARBOARD VALUE & OPPORTUNITY S LLC(9)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013
  • 3OWNERSHIP DOCUMENT1 Nov 2012

Powers Gregg J(9)

  • 4Statement of changes in beneficial ownership3 Apr 2017
  • 4Statement of changes in beneficial ownership6 Mar 2017
  • 4Statement of changes in beneficial ownership4 Nov 2015
  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership4 Dec 2014
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 3/AAMENDMENT TO INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES5 Dec 2014
  • 3Initial statement of beneficial ownership13 Aug 2013

MARENGI JOSEPH A(8)

  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 4Statement of changes in beneficial ownership1 Sep 2010
  • 4Statement of changes in beneficial ownership2 Sep 2009
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership4 Sep 2007
  • 4Statement of changes in beneficial ownership20 Aug 2007
  • 3Initial statement of beneficial ownership31 May 2007

WOLF DENNIS P(8)

  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 4Statement of changes in beneficial ownership3 Nov 2010
  • 4Statement of changes in beneficial ownership1 Sep 2010
  • 4Statement of changes in beneficial ownership2 Sep 2009
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership4 Sep 2007
  • 4Statement of changes in beneficial ownership20 Aug 2007
  • 3Initial statement of beneficial ownership20 Jul 2007

RAU RAGHAVENDRA(8)

  • 4Statement of changes in beneficial ownership26 Apr 2022
  • 4Statement of changes in beneficial ownership5 Oct 2021
  • 4Statement of changes in beneficial ownership16 Aug 2021
  • 4Statement of changes in beneficial ownership3 Sep 2020
  • 4Statement of changes in beneficial ownership9 Sep 2019
  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership3 Apr 2017
  • 3Initial statement of beneficial ownership3 Apr 2017

Breard Linda M.(8)

  • 4Statement of changes in beneficial ownership2 Jul 2015
  • 4Statement of changes in beneficial ownership3 Jul 2014
  • 4Statement of changes in beneficial ownership2 Jul 2013
  • 4Statement of changes in beneficial ownership3 Jul 2012
  • 4Statement of changes in beneficial ownership5 Jul 2011
  • 4Statement of changes in beneficial ownership2 Jun 2011
  • 4Statement of changes in beneficial ownership7 Feb 2011
  • 3Initial statement of beneficial ownership19 Jan 2011

Lee Janae S.(8)

  • 4Statement of changes in beneficial ownership2 Jul 2015
  • 4Statement of changes in beneficial ownership7 Nov 2014
  • 4Statement of changes in beneficial ownership3 Jul 2014
  • 4Statement of changes in beneficial ownership2 Jul 2013
  • 4Statement of changes in beneficial ownership3 Jul 2012
  • 4Statement of changes in beneficial ownership5 Jul 2011
  • 4Statement of changes in beneficial ownership2 Jun 2011
  • 3Initial statement of beneficial ownership8 Apr 2011

Starboard Value & Opportunity C LP(8)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015
  • 4OWNERSHIP DOCUMENT8 Apr 2013
  • 4OWNERSHIP DOCUMENT3 Apr 2013
  • 4OWNERSHIP DOCUMENT15 Mar 2013

SANCHEZ ADALIO T(8)

  • 4Statement of changes in beneficial ownership12 Mar 2019
  • 4Statement of changes in beneficial ownership2 Feb 2018
  • 4Statement of changes in beneficial ownership2 Jan 2018
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 4Statement of changes in beneficial ownership5 May 2017
  • 3Initial statement of beneficial ownership4 May 2017

PACIFIC INVESTMENT MANAGEMENT CO LLC(7)

  • 4Statement of changes in beneficial ownership17 Apr 2025
  • 4Statement of changes in beneficial ownership7 Jan 2025
  • 4Statement of changes in beneficial ownership15 Aug 2024
  • 4Statement of changes in beneficial ownership15 Jul 2024
  • 4Statement of changes in beneficial ownership29 May 2024
  • 4Statement of changes in beneficial ownership9 Jun 2023
  • 3Initial statement of beneficial ownership25 Apr 2022

FULLER DALE L(7)

  • 4Statement of changes in beneficial ownership3 Mar 2017
  • 4Statement of changes in beneficial ownership5 Nov 2015
  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership6 Aug 2015
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 3Initial statement of beneficial ownership11 Sep 2014
  • 3OWNERSHIP DOCUMENT19 May 2014

KRALL DAVID(7)

  • 4Statement of changes in beneficial ownership6 Mar 2017
  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 4Statement of changes in beneficial ownership5 Sep 2012
  • 4Statement of changes in beneficial ownership2 Sep 2011
  • 3Initial statement of beneficial ownership29 Aug 2011

GANNON JOHN B(7)

  • 4PRIMARY DOCUMENT24 Mar 2005
  • 4PRIMARY DOCUMENT15 Feb 2005
  • 4PRIMARY DOCUMENT4 Feb 2005
  • 4PRIMARY DOCUMENT31 Aug 2004
  • 4PRIMARY DOCUMENT22 Jul 2004
  • 4PRIMARY DOCUMENT8 Jun 2004
  • 4PRIMARY DOCUMENT23 Feb 2004

FRAUENFELDER LEWIS(7)

  • 4PRIMARY DOCUMENT4 Feb 2005
  • 4PRIMARY DOCUMENT31 Aug 2004
  • 4PRIMARY DOCUMENT26 Jul 2004
  • 4PRIMARY DOCUMENT22 Jul 2004
  • 4PRIMARY DOCUMENT8 Jun 2004
  • 4PRIMARY DOCUMENT26 Feb 2004
  • 3PRIMARY DOCUMENT17 Feb 2004

WHEELWRIGHT STEVEN(7)

  • 4PRIMARY DOCUMENT30 Aug 2006
  • 4PRIMARY DOCUMENT29 Sep 2005
  • 4PRIMARY DOCUMENT14 Sep 2005
  • 4PRIMARY DOCUMENT29 Sep 2004
  • 4PRIMARY DOCUMENT18 Mar 2004
  • 4PRIMARY DOCUMENT26 Feb 2004
  • 3PRIMARY DOCUMENT17 Feb 2004

Dialectic Antithesis Partners, LP(7)

  • 4Statement of changes in beneficial ownership5 Dec 2019
  • 4Statement of changes in beneficial ownership23 Jan 2019
  • 4Statement of changes in beneficial ownership17 Jan 2019
  • 4Statement of changes in beneficial ownership11 Jan 2019
  • 4Statement of changes in beneficial ownership3 Jan 2019
  • 4Statement of changes in beneficial ownership28 Dec 2018
  • 3Initial statement of beneficial ownership28 Dec 2018

BR Dialectic Capital Management, LLC(7)

  • 4Statement of changes in beneficial ownership5 Dec 2019
  • 4Statement of changes in beneficial ownership23 Jan 2019
  • 4Statement of changes in beneficial ownership17 Jan 2019
  • 4Statement of changes in beneficial ownership11 Jan 2019
  • 4Statement of changes in beneficial ownership3 Jan 2019
  • 4Statement of changes in beneficial ownership28 Dec 2018
  • 3Initial statement of beneficial ownership28 Dec 2018

White Yue Zhou(7)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership6 Sep 2022
  • 4Statement of changes in beneficial ownership5 Oct 2021
  • 3Initial statement of beneficial ownership23 Sep 2021

Spanjaard Henk Jan(7)

  • 4Statement of changes in beneficial ownership17 Jan 2025
  • 4Statement of changes in beneficial ownership5 Dec 2024
  • 4/AStatement of changes in beneficial ownership (amendment)17 Jan 2025
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4Statement of changes in beneficial ownership23 Apr 2024
  • 3Initial statement of beneficial ownership12 Apr 2024

Press Clifford(6)

  • 4Statement of changes in beneficial ownership9 Sep 2019
  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership3 Apr 2017
  • 4Statement of changes in beneficial ownership3 Mar 2017
  • 4Statement of changes in beneficial ownership5 Apr 2016
  • 3Initial statement of beneficial ownership5 Apr 2016

Dalton Stephen P(6)

  • 4Statement of changes in beneficial ownership1 Nov 2007
  • 4Statement of changes in beneficial ownership3 Oct 2007
  • 4Statement of changes in beneficial ownership5 Sep 2007
  • 4Statement of changes in beneficial ownership3 Jul 2007
  • 4Statement of changes in beneficial ownership16 Aug 2007
  • 3Initial statement of beneficial ownership6 Apr 2007

Jacoby Rebecca(6)

  • 4Statement of changes in beneficial ownership6 Sep 2022
  • 4Statement of changes in beneficial ownership26 Apr 2022
  • 4Statement of changes in beneficial ownership5 Oct 2021
  • 4Statement of changes in beneficial ownership3 Sep 2020
  • 4Statement of changes in beneficial ownership4 Feb 2020
  • 3Initial statement of beneficial ownership17 Dec 2019

MacPherson Regan J(6)

  • 4Statement of changes in beneficial ownership15 Mar 2021
  • 4Statement of changes in beneficial ownership23 Dec 2020
  • 4Statement of changes in beneficial ownership2 Jul 2020
  • 4Statement of changes in beneficial ownership19 Mar 2020
  • 4Statement of changes in beneficial ownership4 Feb 2020
  • 3Initial statement of beneficial ownership5 Nov 2019

Hurley John(6)

  • 4Statement of changes in beneficial ownership6 Sep 2023
  • 4Statement of changes in beneficial ownership12 Jul 2023
  • 4Statement of changes in beneficial ownership6 Sep 2022
  • 4Statement of changes in beneficial ownership6 Jul 2022
  • 4Statement of changes in beneficial ownership2 Sep 2021
  • 3Initial statement of beneficial ownership19 Aug 2021

Jaworksi Don(6)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership5 Jan
  • 4/AStatement of changes in beneficial ownership (amendment)19 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 4Statement of changes in beneficial ownership17 Nov 2022
  • 3Initial statement of beneficial ownership17 Nov 2022

Wilderotter Mary Agnes(5)

  • 4PRIMARY DOCUMENT28 Sep 2005
  • 4PRIMARY DOCUMENT14 Sep 2005
  • 4PRIMARY DOCUMENT2 Dec 2004
  • 4PRIMARY DOCUMENT29 Sep 2004
  • 3PRIMARY DOCUMENT2 Sep 2004

DINARDO LOUIS(5)

  • 4Statement of changes in beneficial ownership6 Mar 2017
  • 4Statement of changes in beneficial ownership3 Sep 2015
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 3Initial statement of beneficial ownership9 Aug 2013

KENNEDY KEVIN J(5)

  • 4PRIMARY DOCUMENT2 Nov 2004
  • 4/APRIMARY DOCUMENT29 Oct 2004
  • 4PRIMARY DOCUMENT29 Sep 2004
  • 4PRIMARY DOCUMENT18 Mar 2004
  • 4PRIMARY DOCUMENT26 Feb 2004

Pasternack Bruce A(5)

  • 4Statement of changes in beneficial ownership2 Sep 2009
  • 4Statement of changes in beneficial ownership3 Sep 2008
  • 4Statement of changes in beneficial ownership4 Sep 2007
  • 4Statement of changes in beneficial ownership20 Aug 2007
  • 3Initial statement of beneficial ownership20 Jul 2007

Starboard Value R LP(5)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015

Starboard Value R GP LLC(5)

  • 4OWNERSHIP DOCUMENT7 Dec 2016
  • 4OWNERSHIP DOCUMENT5 Dec 2016
  • 4OWNERSHIP DOCUMENT18 Mar 2016
  • 4OWNERSHIP DOCUMENT26 Jan 2016
  • 4OWNERSHIP DOCUMENT13 Oct 2015

Tracy John R.(5)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership5 Nov 2024
  • 4Statement of changes in beneficial ownership21 Oct 2024
  • 3Initial statement of beneficial ownership8 Jul 2024

Craythorne Anthony(5)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership5 Aug
  • 4Statement of changes in beneficial ownership3 Apr
  • 4Statement of changes in beneficial ownership5 Jan
  • 3Initial statement of beneficial ownership14 Jul 2025

B. RILEY FBR, INC.(4)

  • 4Statement of changes in beneficial ownership8 Apr 2020
  • 4Statement of changes in beneficial ownership17 Jan 2019
  • 4Statement of changes in beneficial ownership11 Jan 2019
  • 4Statement of changes in beneficial ownership28 Dec 2018

Hayes Edward J Jr(4)

  • 4PRIMARY DOCUMENT24 Aug 2006
  • 4PRIMARY DOCUMENT29 Jun 2005
  • 4PRIMARY DOCUMENT3 Jun 2005
  • 3PRIMARY DOCUMENT1 Jul 2004

PARTRIDGE JOHN(4)

  • 4PRIMARY DOCUMENT30 Aug 2006
  • 4PRIMARY DOCUMENT28 Sep 2005
  • 4PRIMARY DOCUMENT14 Sep 2005
  • 3PRIMARY DOCUMENT7 Mar 2005

Black Philip(4)

  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership2 Oct 2014
  • 4Statement of changes in beneficial ownership4 Sep 2013
  • 3Initial statement of beneficial ownership8 Aug 2013

Singer Eric(4)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership9 Sep 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

Blevins Tony J(4)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership4 Nov 2025
  • 3Initial statement of beneficial ownership17 Sep 2025

Clancy James C(4)

  • 4Statement of changes in beneficial ownership5 Oct
  • 4Statement of changes in beneficial ownership5 Jan
  • 4Statement of changes in beneficial ownership4 Nov 2025
  • 3Initial statement of beneficial ownership17 Sep 2025

SANDERSON EDWARD J(3)

  • 4PRIMARY DOCUMENT29 Sep 2004
  • 4PRIMARY DOCUMENT18 Mar 2004
  • 4PRIMARY DOCUMENT26 Feb 2004

Pinchev Alex(3)

  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership1 Jun 2017
  • 3Initial statement of beneficial ownership1 Jun 2017

Andersen Robert J(3)

  • 4Statement of changes in beneficial ownership2 Sep 2015
  • 4Statement of changes in beneficial ownership5 Jun 2015
  • 3Initial statement of beneficial ownership6 May 2015

VIEX Opportunities Fund, LP Series One(3)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

VIEX Capital Advisors, LLC(3)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

VIEX Special Opportunities Fund III, LP(3)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

VIEX GP, LLC(3)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

VIEX Opportunities Fund, LP - Series Two(3)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

VIEX Special Opportunities GP III, LLC(3)

  • 4OWNERSHIP DOCUMENT12 Dec 2019
  • 4Statement of changes in beneficial ownership4 Dec 2017
  • 3OWNERSHIP DOCUMENT2 Jun 2016

Dialectic Technology SPV LLC(3)

  • 4Statement of changes in beneficial ownership8 Jun
  • 4Statement of changes in beneficial ownership23 Dec 2025
  • 3Initial statement of beneficial ownership23 Dec 2025

SOROS GEORGE(2)

  • 4Statement of changes in beneficial ownership30 Jan 2015
  • 3Initial statement of beneficial ownership29 May 2012

SOROS FUND MANAGEMENT LLC(2)

  • 4Statement of changes in beneficial ownership30 Jan 2015
  • 3Initial statement of beneficial ownership29 May 2012

SLAYTON GREGORY W(2)

  • 4PRIMARY DOCUMENT18 Mar 2004
  • 4PRIMARY DOCUMENT26 Feb 2004

BROWN DAVID A/CA(2)

  • 4PRIMARY DOCUMENT18 Mar 2004
  • 4PRIMARY DOCUMENT26 Feb 2004

RILEY BRYANT R(2)

  • 4Statement of changes in beneficial ownership29 Oct 2021
  • 4Statement of changes in beneficial ownership28 Apr 2021

MUTCH JOHN(2)

  • 4Statement of changes in beneficial ownership3 Apr 2017
  • 3Initial statement of beneficial ownership3 Apr 2017

Matthews Howard L(2)

  • 4PRIMARY DOCUMENT24 Aug 2006
  • 3PRIMARY DOCUMENT9 Jun 2005

Panayides, Andy(2)

  • 4PRIMARY DOCUMENT8 Feb 2007
  • 3PRIMARY DOCUMENT5 Sep 2006

SOROS ROBERT(2)

  • 4Statement of changes in beneficial ownership30 Jan 2015
  • 3Initial statement of beneficial ownership29 May 2012

Dennis Patrick(2)

  • 4Statement of changes in beneficial ownership2 Feb 2018
  • 3Initial statement of beneficial ownership17 Jan 2018

Willis Christopher Shawn(2)

  • 4Statement of changes in beneficial ownership8 Feb 2016
  • 3Initial statement of beneficial ownership5 Feb 2016

White William Hillis(2)

  • 4Statement of changes in beneficial ownership4 Mar
  • 3Initial statement of beneficial ownership9 Feb

Patel Hiral(2)

  • 4Statement of changes in beneficial ownership5 Oct
  • 3Initial statement of beneficial ownership8 Sep

QUANTUM CORP /DE/(1)

  • 3Initial statement of beneficial ownership8 Jun 2000

TERINO EDWARD(1)

  • 3OWNERSHIP DOCUMENT19 May 2014

NELSON BARBARA H(1)

  • 5PRIMARY DOCUMENT15 Apr 2004

LAMBERT MICHAEL(1)

  • 4PRIMARY DOCUMENT23 Feb 2004

ORECKLIN LAWRENCE(1)

  • 5PRIMARY DOCUMENT15 Apr 2004

MAURER JERALD L(1)

  • 5PRIMARY DOCUMENT15 Apr 2004

Arden Todd(1)

  • 3Initial statement of beneficial ownership17 Jun 2024

CROWELL CHRISTOPHER(1)

  • 3OWNERSHIP DOCUMENT19 May 2014

Neumeyer Christopher D.(1)

  • 3Initial statement of beneficial ownership29 Aug 2022

≥5% Ownership

FMR LLC(19)

  • SC 13G/AQuantum Corp /De/10 Jun 2016
  • SC 13G/AQuantum Corp /De/12 Feb 2016
  • SC 13G/AQuantum Corp /De/13 Feb 2015
  • SC 13G/AQuantum Corp /De/14 Feb 2014
  • SC 13G/AQuantum Corp /De/14 Feb 2013
  • SC 13G/AQuantum Corp /De/14 Feb 2012
  • SC 13G/AQuantum Corp /De/10 Aug 2011
  • SC 13GQuantum Corp /De/14 Feb 2011
  • SC 13G/AQuantum Corp /De/14 Feb 2001
  • SC 13G/AQuantum Corp /De/13 Feb 2001

BlackRock Inc.(16)

  • SC 13G/AQuantum Corp /De/8 Jul 2022
  • SC 13GQuantum Corp /De/11 Mar 2022
  • SC 13GQuantum Corp /De/8 Feb 2022
  • SC 13G/AQuantum Corp /De/10 Jul 2018
  • SC 13GQuantum Corp /De/1 Feb 2018
  • SC 13G/AQuantum Corp /De/8 Jul 2016
  • SC 13G/AQuantum Corp /De/27 Jan 2016
  • SC 13G/AQuantum Corp /De/29 Jan 2015
  • SC 13G/AQuantum Corp /De/30 Jan 2014
  • SC 13GQuantum Corp /De/30 Jan 2013

PRIVATE CAPITAL MANAGEMENT(15)

  • SC 13G/AQuantum Corp /De/15 Feb 2013
  • SC 13G/AQuantum Corp /De/14 Feb 2012
  • SC 13G/AQuantum Corp /De/14 Feb 2011
  • SC 13G/AQuantum Corp /De/10 Aug 2010
  • SC 13G/AQuantum Corp /De/10 Feb 2010
  • SC 13G/AQuantum Corp /De/13 Feb 2009
  • SC 13G/AQuantum Corp /De/14 Feb 2008
  • SC 13G/AQuantum Corp /De/14 Feb 2007
  • SC 13G/AQuantum Corp /De/14 Feb 2006
  • SC 13G/AQuantum Corp /De/14 Feb 2005

PACIFIC INVESTMENT MANAGEMENT CO LLC(13)

  • SC 13D/AQuantum Corp /De/17 Apr 2025
  • SC 13D/AQuantum Corp /De/31 Mar 2025
  • SC 13D/AQuantum Corp /De/21 Mar 2025
  • SC 13D/AQuantum Corp /De/7 Jan 2025
  • SC 13D/AQuantum Corp /De/15 Aug 2024
  • SC 13D/AQuantum Corp /De/14 Jul 2023
  • SC 13D/AQuantum Corp /De/14 Jun 2023
  • SC 13D/AQuantum Corp /De/24 Aug 2022
  • SC 13D/AQuantum Corp /De/12 Aug 2022
  • SC 13D/AQuantum Corp /De/26 Apr 2022

VIEX Capital Advisors, LLC(13)

  • SC 13D/AQuantum Corp /De/11 Mar 2020
  • SC 13D/AQuantum Corp /De/9 Jan 2020
  • SC 13D/AQuantum Corp /De/5 Nov 2019
  • SC 13D/AQuantum Corp /De/13 Nov 2017
  • SC 13D/AQuantum Corp /De/3 Mar 2017
  • SC 13D/AQuantum Corp /De/6 Feb 2017
  • SC 13D/AQuantum Corp /De/6 Dec 2016
  • SC 13D/AQuantum Corp /De/27 Sep 2016
  • SC 13D/AQuantum Corp /De/7 Jun 2016
  • SC 13D/AQuantum Corp /De/2 Jun 2016

CITIGROUP INC(11)

  • SC 13G/AQuantum Corp /De/5 Jan 2006
  • SC 13G/AQuantum Corp /De/10 Feb 2005
  • SC 13G/AQuantum Corp /De/17 Feb 2004
  • SC 13G/AQuantum Corp /De/11 Feb 2003
  • SC 13G/AQuantum Corp /De/6 Feb 2002
  • SC 13G/AQuantum Corp /De/10 Dec 2001
  • SC 13G/AQuantum Corp /De/16 Feb 2001
  • SC 13G/AQuantum Corp /De/16 Feb 2001
  • SC 13G/AQuantum Corp /De/11 Dec 2000
  • SC 13GQuantum Corp /De/11 Dec 2000

B. Riley Financial, Inc.(11)

  • SC 13D/AQuantum Corp /De/8 Aug 2022
  • SC 13D/AQuantum Corp /De/10 Jun 2022
  • SC 13D/AQuantum Corp /De/28 Apr 2022
  • SC 13D/AQuantum Corp /De/1 Nov 2021
  • SC 13D/AQuantum Corp /De/28 Apr 2021
  • SC 13D/AQuantum Corp /De/8 Feb 2021
  • SC 13D/AQuantum Corp /De/29 Apr 2020
  • SC 13DQuantum Corp /De/6 Apr 2020
  • SC 13G/AQuantum Corp /De/28 Jan 2020
  • SC 13G/AQuantum Corp /De/28 Jan 2019

Starboard Value LP(10)

  • SC 13D/AQuantum Corp /De/15 Nov 2017
  • SC 13D/AQuantum Corp /De/7 Dec 2016
  • SC 13D/AQuantum Corp /De/6 Apr 2016
  • SC 13D/AQuantum Corp /De/27 Jan 2016
  • SC 13D/AQuantum Corp /De/7 May 2015
  • SC 13D/AQuantum Corp /De/29 Jul 2014
  • SC 13D/AQuantum Corp /De/13 May 2014
  • SC 13D/AQuantum Corp /De/15 May 2013
  • SC 13D/AQuantum Corp /De/15 Mar 2013
  • SC 13DQuantum Corp /De/1 Nov 2012

NWQ INVESTMENT MANAGEMENT CO LLC(9)

  • SC 13G/AQuantum Corp /De/17 Feb 2009
  • SC 13G/AQuantum Corp /De/10 Dec 2008
  • SC 13G/AQuantum Corp /De/14 Feb 2008
  • SC 13G/AQuantum Corp /De/14 Feb 2007
  • SC 13G/AQuantum Corp /De/24 May 2006
  • SC 13G/AQuantum Corp /De/13 Feb 2006
  • SC 13G/AQuantum Corp /De/14 Feb 2005
  • SC 13G/AQuantum Corp /De/29 Nov 2004
  • SC 13GQuantum Corp /De/9 Dec 2003

MORGAN J P & CO INC(8)

  • SC 13G/AQuantum Corp /De/9 Mar 2000
  • SC 13GQuantum Corp /De/14 Feb 2000
  • SC 13G/AQuantum Corp /De/13 Feb 1998
  • SC 13G/AQuantum Corp /De/9 Apr 1997
  • SC 13G/AQuantum Corp /De/7 Feb 1997
  • SC 13G/AQuantum Corp /De/31 Jan 1997
  • SC 13G/AQuantum Corp /De/15 Feb 1996
  • SC 13G/AQuantum Corp /De/9 Feb 1996

VANGUARD GROUP INC(6)

  • SC 13G/AQuantum Corp /De/31 Jan 2025
  • SC 13GQuantum Corp /De/13 Feb 2024
  • SC 13G/AQuantum Corp /De/10 Feb 2016
  • SC 13G/AQuantum Corp /De/10 Feb 2015
  • SC 13G/AQuantum Corp /De/12 Feb 2014
  • SC 13GQuantum Corp /De/13 Feb 2013

BERNSTEIN SANFORD C & CO INC(6)

  • SC 13G/AQuantum Corp /De/8 Nov 2000
  • SC 13G/AQuantum Corp /De/8 Nov 2000
  • SC 13GQuantum Corp /De/8 Feb 2000
  • SC 13GQuantum Corp /De/8 Feb 2000
  • SC 13G/AQuantum Corp /De/8 Jan 1999
  • SC 13GQuantum Corp /De/4 Feb 1998

SOROS FUND MANAGEMENT LLC(6)

  • SC 13G/AQuantum Corp /De/14 Feb 2017
  • SC 13GQuantum Corp /De/29 Jul 2016
  • SC 13G/AQuantum Corp /De/7 Oct 2015
  • SC 13G/AQuantum Corp /De/29 May 2012
  • SC 13G/AQuantum Corp /De/6 Jan 2012
  • SC 13GQuantum Corp /De/15 Aug 2011

NORDEA NORTH AMERICAN VALUE FUND(6)

  • SC 13G/AQuantum Corp /De/14 Feb 2011
  • SC 13G/AQuantum Corp /De/6 Aug 2010
  • SC 13G/AQuantum Corp /De/12 Feb 2010
  • SC 13G/AQuantum Corp /De/13 Feb 2009
  • SC 13G/AQuantum Corp /De/14 Feb 2008
  • SC 13GQuantum Corp /De/27 Jul 2007

Neuberger Berman Group LLC(6)

  • SC 13G/AQuantum Corp /De/4 Dec 2024
  • SC 13G/AQuantum Corp /De/12 Feb 2024
  • SC 13G/AQuantum Corp /De/10 Feb 2023
  • SC 13G/AQuantum Corp /De/20 May 2022
  • SC 13G/AQuantum Corp /De/14 Feb 2022
  • SC 13GQuantum Corp /De/8 Apr 2021

TCW GROUP INC(5)

  • SC 13G/AQuantum Corp /De/9 Feb 2022
  • SC 13G/AQuantum Corp /De/8 Feb 2021
  • SC 13G/AQuantum Corp /De/7 Feb 2020
  • SC 13G/AQuantum Corp /De/4 Feb 2019
  • SC 13GQuantum Corp /De/10 Dec 2018

AXA FINANCIAL INC(5)

  • SC 13GQuantum Corp /De/10 Feb 2004
  • SC 13G/AQuantum Corp /De/12 Feb 2003
  • SC 13G/AQuantum Corp /De/12 Feb 2002
  • SC 13G/AQuantum Corp /De/12 Feb 2001
  • SC 13GQuantum Corp /De/13 Nov 2000

WELLINGTON MANAGEMENT CO LLP(5)

  • SC 13G/AQuantum Corp /De/14 Feb 2013
  • SC 13GQuantum Corp /De/14 Feb 2012
  • SC 13G/AQuantum Corp /De/13 Feb 2001
  • SC 13G/AQuantum Corp /De/10 Jul 2000
  • SC 13GQuantum Corp /De/11 Feb 2000

MELLON FINANCIAL CORP(4)

  • SC 13G/AQuantum Corp /De/31 Jan 2002
  • SC 13G/AQuantum Corp /De/1 Feb 2001
  • SC 13G/AQuantum Corp /De/9 Feb 2000
  • SC 13GQuantum Corp /De/31 Jan 2000

WELLS FARGO & CO/MN(4)

  • SC 13G/AQuantum Corp /De/12 Nov 2010
  • SC 13G/AQuantum Corp /De/23 Jun 2010
  • SC 13G/AQuantum Corp /De/11 Jun 2010
  • SC 13GQuantum Corp /De/21 Jan 2010

ELM RIDGE CAPITAL MANAGEMENT LLC(4)

  • SC 13G/AQuantum Corp /De/14 Feb 2008
  • SC 13G/AQuantum Corp /De/13 Feb 2007
  • SC 13G/AQuantum Corp /De/14 Feb 2006
  • SC 13GQuantum Corp /De/6 Oct 2005

Noonday Asset Management, L.P.(4)

  • SC 13G/AQuantum Corp /De/21 Jan 2009
  • SC 13G/AQuantum Corp /De/24 Jan 2008
  • SC 13G/AQuantum Corp /De/24 Jan 2007
  • SC 13GQuantum Corp /De/16 Mar 2006

Amici Capital, LLC(4)

  • SC 13G/AQuantum Corp /De/14 Feb 2014
  • SC 13G/AQuantum Corp /De/14 Feb 2013
  • SC 13G/AQuantum Corp /De/6 Feb 2012
  • SC 13GQuantum Corp /De/30 Jun 2011

Clearbridge Advisors, LLC(4)

  • SC 13G/AQuantum Corp /De/13 Feb 2009
  • SC 13G/AQuantum Corp /De/14 Feb 2008
  • SC 13G/AQuantum Corp /De/8 Feb 2007
  • SC 13GQuantum Corp /De/15 Feb 2006

Capital Research Global Investors(4)

  • SC 13G/AQuantum Corp /De/10 Dec 2012
  • SC 13G/AQuantum Corp /De/8 Feb 2012
  • SC 13G/AQuantum Corp /De/10 Feb 2011
  • SC 13GQuantum Corp /De/9 Jul 2010

Private Capital Management, LLC(4)

  • SC 13D/AQuantum Corp /De/9 Nov 2017
  • SC 13D/AQuantum Corp /De/6 Feb 2017
  • SC 13DQuantum Corp /De/17 Aug 2015
  • SC 13GQuantum Corp /De/13 Feb 2014

Dialectic Technology SPV LLC(4)

  • SC 13D/AQuantum Corp /De/8 Jun
  • SC 13D/AQuantum Corp /De/12 Jan
  • SC 13D/AQuantum Corp /De/22 Dec 2025
  • SC 13DQuantum Corp /De/10 Oct 2025

FRANKLIN RESOURCES INC(3)

  • SC 13G/AQuantum Corp /De/6 Feb 1998
  • SC 13G/AQuantum Corp /De/13 Feb 1997
  • SC 13G/AQuantum Corp /De/9 Feb 1996

HARROSH JOSEPH L(3)

  • SC 13G/AQuantum Corp /De/5 Jan 2010
  • SC 13G/AQuantum Corp /De/7 Jan 2009
  • SC 13GQuantum Corp /De/4 Dec 2008

Senvest Management, LLC(3)

  • SC 13G/AQuantum Corp /De/10 Feb 2023
  • SC 13G/AQuantum Corp /De/9 Feb 2022
  • SC 13GQuantum Corp /De/18 Nov 2021

Park West Asset Management LLC(3)

  • SC 13G/AQuantum Corp /De/14 Feb 2019
  • SC 13GQuantum Corp /De/14 Feb 2018
  • SC 13GQuantum Corp /De/20 Nov 2017

Long Focus Capital Management, LLC(3)

  • SC 13G/AQuantum Corp /De/15 May 2025
  • SC 13G/AQuantum Corp /De/14 Feb 2024
  • SC 13GQuantum Corp /De/11 May 2023

ADK Soho Fund LP(3)

  • SC 13G/AQuantum Corp /De/8 May 2025
  • SC 13G/AQuantum Corp /De/17 Jan 2024
  • SC 13GQuantum Corp /De/4 Dec 2023

CAPITAL RESEARCH & MANAGEMENT CO(2)

  • SC 13G/AQuantum Corp /De/12 Feb 2001
  • SC 13GQuantum Corp /De/14 Feb 2000

J P MORGAN CHASE & CO(2)

  • SC 13G/AQuantum Corp /De/11 Feb 2002
  • SC 13GQuantum Corp /De/14 Feb 2001

QUANTUM CORP /DE/(2)

  • SC 13DAdvanced Digital Information Corp12 May 2006
  • SC 13DMeridian Data Inc20 May 1999

CAPITAL GROUP COMPANIES INC ET AL(2)

  • SC 13GQuantum Corp /De/11 Feb 1998
  • SC 13G/AQuantum Corp /De/14 Feb 1997

LAZARD FRERES & CO LLC(2)

  • SC 13G/AQuantum Corp /De/14 Feb 2001
  • SC 13GQuantum Corp /De/3 Feb 2000

180 DEGREE CAPITAL CORP. /NY/(2)

  • SC 13G/AQuantum Corp /De/14 Feb 2022
  • SC 13GQuantum Corp /De/29 Jan 2021

GOLDMAN SACHS GROUP LP(2)

  • SC 13G/AQuantum Corp /De/16 Feb 1999
  • SC 13GQuantum Corp /De/17 Feb 1998

RENAISSANCE TECHNOLOGIES LLC(2)

  • SC 13G/AQuantum Corp /De/11 Feb 2011
  • SC 13GQuantum Corp /De/11 Feb 2010

TENNENBAUM CAPITAL PARTNERS LLC(2)

  • SC 13G/AQuantum Corp /De/11 Feb 2010
  • SC 13GQuantum Corp /De/28 Mar 2008

Silver Point Capital L.P.(2)

  • SC 13GQuantum Corp /De/14 Feb 2008
  • SC 13GQuantum Corp /De/16 Aug 2007

Portolan Capital Management, LLC(2)

  • SC 13G/AQuantum Corp /De/13 Feb 2019
  • SC 13GQuantum Corp /De/2 Feb 2018

Blue Torch Capital LP(2)

  • SC 13D/AQuantum Corp /De/21 Feb 2025
  • SC 13DQuantum Corp /De/6 Jan 2025

OAKTREE CAPITAL MANAGEMENT LP(1)

  • SC 13GQuantum Corp /De/10 Aug

Alyeska Investment Group, L.P.(1)

  • SC 13GQuantum Corp /De/14 Aug

VIEX Special Opportunities Fund III, LP(1)

  • SC 13DQuantum Corp /De/28 Dec 2015

Two Seas Capital LP(1)

  • SC 13GQuantum Corp /De/14 Aug