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Octave Specialty Group Inc(OSG US)

$5.41+0.142.66%Ext:$5.02-0.397.18%(After Hours · 22:51:44 UTC)

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Octave Specialty Group Inc(OSG US)

$5.41+0.142.66%Ext:$5.02-0.397.18%(After Hours · 22:51:44 UTC)

Doc Search Profile Entity StructureFinancials Charting Short Interest Employees

Overview

Profile Entity Structure

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Home Stock Screener Document Search Charting Watchlists Recent Filings

Octave Specialty Group Inc(OSG US)

$5.41+0.142.66%Ext:$5.02-0.397.18%(After Hours · 22:51:44 UTC)

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Doc Search Profile Entity StructureFinancials Charting Short Interest Employees

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OSG US

Home Stock Screener Document Search Charting Watchlists Recent Filings

Octave Specialty Group Inc(OSG US)

$5.41+0.142.66%Ext:$5.02-0.397.18%(After Hours · 22:51:44 UTC)

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Doc Search Profile Entity StructureFinancials Charting Short Interest Employees

Overview

Profile Entity Structure

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SEC Filings

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Financials Charting Short Interest Employees

OSG US

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Insider Ownership

BIENSTOCK GREGG L(71)

Form 4PRIMARY DOCUMENT30 Jun 2010
Form 4PRIMARY DOCUMENT4 Feb 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT24 Nov 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4/AStatement of changes in beneficial ownership (amendment)2 Feb 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 5/APRIMARY DOCUMENT27 Jan 2009
Form 5PRIMARY DOCUMENT26 Jan 2009
Form 4PRIMARY DOCUMENT31 Dec 2008

LASSITER PHILLIP B(67)

Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT23 Feb 2007

Trick David(60)

Form 4Statement of changes in beneficial ownership6 Oct
Form 4Statement of changes in beneficial ownership13 Jul
Form 4Statement of changes in beneficial ownership25 Mar
Form 4Statement of changes in beneficial ownership5 Mar
Form 4Statement of changes in beneficial ownership3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Mar
Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025
Form 4Statement of changes in beneficial ownership14 Mar 2025

LeBlanc Claude(56)

Form 4Statement of changes in beneficial ownership6 Oct
Form 4Statement of changes in beneficial ownership13 Jul
Form 4Statement of changes in beneficial ownership25 Mar
Form 4Statement of changes in beneficial ownership5 Mar
Form 4Statement of changes in beneficial ownership5 Jan
Form 4/AStatement of changes in beneficial ownership (amendment)3 Oct 2025
Form 4Statement of changes in beneficial ownership3 Oct 2025
Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership11 Aug 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025

SHOBACK ROBERT G(52)

Form 4PRIMARY DOCUMENT2 Feb 2009
Form 4PRIMARY DOCUMENT30 Jan 2009
Form 4PRIMARY DOCUMENT28 Jan 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT23 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT10 Sep 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT10 Mar 2008

GENADER ROBERT J(51)

Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT2 Nov 2007
Form 4PRIMARY DOCUMENT30 Oct 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT30 Apr 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT15 Feb 2007
Form 4PRIMARY DOCUMENT6 Feb 2007

UHLEIN JOHN W(51)

Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT12 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT10 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007

DOYLE KEVIN J(49)

Form 4PRIMARY DOCUMENT4 Mar 2011
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT29 Jan 2008

Ksenak Stephen Michael(48)

Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025
Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership8 Aug 2024
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership11 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024

GANDOLFO THOMAS J(44)

Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT29 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT1 Nov 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT9 Mar 2007

CALLEN MICHAEL A(43)

Form 4PRIMARY DOCUMENT1 Dec 2010
Form 4PRIMARY DOCUMENT5 Jun 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT2 Jul 2008
Form 4PRIMARY DOCUMENT24 Jun 2008
Form 4PRIMARY DOCUMENT16 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008

Eisman Robert Bryan(43)

Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership11 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024
Form 4Statement of changes in beneficial ownership23 Feb 2024
Form 4Statement of changes in beneficial ownership9 Mar 2023
Form 4Statement of changes in beneficial ownership6 Mar 2023

Smith R Sharon(43)

Form 4Statement of changes in beneficial ownership6 Oct
Form 4Statement of changes in beneficial ownership13 Jul
Form 4Statement of changes in beneficial ownership25 Mar
Form 4Statement of changes in beneficial ownership5 Mar
Form 4Statement of changes in beneficial ownership14 Nov 2025
Form 4Statement of changes in beneficial ownership3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Mar
Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025

THEOBALD THOMAS C(42)

Form 4PRIMARY DOCUMENT9 Apr 2012
Form 4/APRIMARY DOCUMENT29 Feb 2012
Form 4PRIMARY DOCUMENT6 Jan 2012
Form 4/APRIMARY DOCUMENT10 Jan 2012
Form 4PRIMARY DOCUMENT19 Nov 2010
Form 4PRIMARY DOCUMENT24 May 2010
Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008

Wallis David W(41)

Form 4PRIMARY DOCUMENT28 Sep 2011
Form 4/AStatement of changes in beneficial ownership (amendment)22 Mar 2012
Form 4PRIMARY DOCUMENT22 Mar 2011
Form 4PRIMARY DOCUMENT4 Mar 2011
Form 4PRIMARY DOCUMENT17 Dec 2010
Form 4PRIMARY DOCUMENT24 Nov 2010
Form 4PRIMARY DOCUMENT2 Aug 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4/APRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT1 Feb 2010

RENFIELD MILLER DOUGLAS C(39)

Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007

Stein Jeffrey Scott(38)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership15 May 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025

MCKINNON WILLIAM T(37)

Form 4PRIMARY DOCUMENT29 Jan 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT24 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT30 Oct 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT24 Jul 2007
Form 4PRIMARY DOCUMENT8 Jun 2007

CONSIDINE JILL M(35)

Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007

MCDONOUGH KATHLEEN A(35)

Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT14 Nov 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT20 Feb 2007
Form 4PRIMARY DOCUMENT20 Feb 2007
Form 4PRIMARY DOCUMENT6 Feb 2007
Form 4PRIMARY DOCUMENT31 Jan 2007

BARRANCO DAVID(35)

Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership11 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024
Form 4Statement of changes in beneficial ownership23 Feb 2024
Form 4Statement of changes in beneficial ownership9 Mar 2023
Form 4Statement of changes in beneficial ownership6 Mar 2023

WALLACE HENRY D G(34)

Form 4PRIMARY DOCUMENT23 Nov 2010
Form 4PRIMARY DOCUMENT27 May 2010
Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT10 Mar 2008

HAFT IAN DAVID(31)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

UNGER LAURA S(30)

Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007

GREGORY W GRANT(30)

Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT10 May 2007
Form 4PRIMARY DOCUMENT7 May 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT8 Dec 2006
Form 4PRIMARY DOCUMENT8 Sep 2006
Form 4PRIMARY DOCUMENT9 Jun 2006
Form 4PRIMARY DOCUMENT15 May 2006

LAMMTENNANT JOAN M(29)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

BOYLE DAVID L(28)

Form 4PRIMARY DOCUMENT3 Jun 2005
Form 4PRIMARY DOCUMENT6 May 2005
Form 4PRIMARY DOCUMENT3 May 2005
Form 4PRIMARY DOCUMENT2 May 2005
Form 4PRIMARY DOCUMENT26 Apr 2005
Form 4PRIMARY DOCUMENT4 Mar 2005
Form 4PRIMARY DOCUMENT16 Feb 2005
Form 4PRIMARY DOCUMENT3 Dec 2004
Form 4PRIMARY DOCUMENT3 Sep 2004
Form 4PRIMARY DOCUMENT3 Jun 2004

Leonard Sean T(28)

Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT2 Feb 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT23 Jul 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT10 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008

IGLESIAS LISA G(26)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership3 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

REILLY MICHAEL FRANCIS(21)

Form 4Statement of changes in beneficial ownership9 Mar 2021
Form 4Statement of changes in beneficial ownership8 Mar 2021
Form 4Statement of changes in beneficial ownership3 Mar 2021
Form 4Statement of changes in beneficial ownership4 Jan 2021
Form 4Statement of changes in beneficial ownership20 May 2020
Form 4Statement of changes in beneficial ownership6 Mar 2020
Form 4Statement of changes in beneficial ownership4 Mar 2020
Form 4Statement of changes in beneficial ownership6 Jan 2020
Form 4Statement of changes in beneficial ownership17 May 2019
Form 4Statement of changes in beneficial ownership5 Mar 2019

PRICE MICHAEL D(19)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership14 May 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025

PRIEUR C JAMES(19)

Form 4Statement of changes in beneficial ownership4 Jan 2023
Form 4Statement of changes in beneficial ownership3 Oct 2022
Form 4Statement of changes in beneficial ownership5 Jul 2022
Form 4Statement of changes in beneficial ownership16 May 2022
Form 4Statement of changes in beneficial ownership16 May 2022
Form 4Statement of changes in beneficial ownership5 Apr 2022
Form 4Statement of changes in beneficial ownership7 Mar 2022
Form 4Statement of changes in beneficial ownership2 Mar 2022
Form 4Statement of changes in beneficial ownership12 Nov 2021
Form 4Statement of changes in beneficial ownership10 Aug 2021

Matus Kristi Ann(19)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

Herzog David L(16)

Form 4Statement of changes in beneficial ownership4 Apr 2023
Form 4Statement of changes in beneficial ownership4 Jan 2023
Form 4Statement of changes in beneficial ownership3 Oct 2022
Form 4Statement of changes in beneficial ownership5 Jul 2022
Form 4Statement of changes in beneficial ownership5 Apr 2022
Form 4Statement of changes in beneficial ownership2 Mar 2022
Form 4Statement of changes in beneficial ownership12 Nov 2021
Form 4Statement of changes in beneficial ownership10 Aug 2021
Form 4Statement of changes in beneficial ownership12 May 2021
Form 4Statement of changes in beneficial ownership1 May 2020

NADER TAVAKOLI(15)

Form 4Statement of changes in beneficial ownership20 Sep 2016
Form 4Statement of changes in beneficial ownership28 Jun 2016
Form 4Statement of changes in beneficial ownership15 Jun 2016
Form 4Statement of changes in beneficial ownership20 May 2016
Form 4Statement of changes in beneficial ownership7 Apr 2016
Form 4Statement of changes in beneficial ownership31 Mar 2016
Form 4Statement of changes in beneficial ownership8 Jan 2016
Form 4Statement of changes in beneficial ownership5 Jan 2016
Form 4Statement of changes in beneficial ownership15 Dec 2015
Form 4Statement of changes in beneficial ownership13 Nov 2015

Adams Diana(15)

Form 4Statement of changes in beneficial ownership22 Dec 2014
Form 4OWNERSHIP DOCUMENT23 Dec 2013
Form 4OWNERSHIP DOCUMENT1 May 2013
Form 4OWNERSHIP DOCUMENT29 Jan 2013
Form 4PRIMARY DOCUMENT4 Mar 2011
Form 4PRIMARY DOCUMENT22 Dec 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT24 Jul 2009
Form 4PRIMARY DOCUMENT28 Jan 2009
Form 4PRIMARY DOCUMENT27 Jan 2009

DULUDE RICHARD(14)

Form 4PRIMARY DOCUMENT3 May 2005
Form 4PRIMARY DOCUMENT4 Mar 2005
Form 4PRIMARY DOCUMENT3 Dec 2004
Form 4PRIMARY DOCUMENT3 Sep 2004
Form 4PRIMARY DOCUMENT3 Jun 2004
Form 4PRIMARY DOCUMENT6 May 2004
Form 4PRIMARY DOCUMENT31 Mar 2004
Form 4PRIMARY DOCUMENT5 Mar 2004
Form 5PRIMARY DOCUMENT6 Feb 2004
Form 4PRIMARY DOCUMENT5 Dec 2003

CAPORALI RENSO L(13)

Form 4PRIMARY DOCUMENT3 May 2005
Form 4PRIMARY DOCUMENT4 Mar 2005
Form 4PRIMARY DOCUMENT3 Dec 2004
Form 4PRIMARY DOCUMENT3 Sep 2004
Form 4PRIMARY DOCUMENT3 Jun 2004
Form 4PRIMARY DOCUMENT6 May 2004
Form 4PRIMARY DOCUMENT5 Mar 2004
Form 4PRIMARY DOCUMENT5 Dec 2003
Form 4PRIMARY DOCUMENT5 Dec 2003
Form 4PRIMARY DOCUMENT4 Sep 2003

McGinnis Daniel(12)

Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025
Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024
Form 4Statement of changes in beneficial ownership6 Mar 2023
Form 4Statement of changes in beneficial ownership2 Mar 2023

DEROSA PAUL R(11)

Form 4PRIMARY DOCUMENT6 Jan 2010
Form 4PRIMARY DOCUMENT5 Oct 2009
Form 4/APRIMARY DOCUMENT7 Jul 2009
Form 4PRIMARY DOCUMENT2 Jul 2009
Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT2 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 3PRIMARY DOCUMENT9 Jul 2008

Duff Philip N(11)

Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 3PRIMARY DOCUMENT8 May 2007
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007

Greene Alexander David(11)

Form 4Statement of changes in beneficial ownership13 May 2021
Form 4Statement of changes in beneficial ownership1 May 2020
Form 4Statement of changes in beneficial ownership1 May 2019
Form 4Statement of changes in beneficial ownership1 May 2018
Form 4Statement of changes in beneficial ownership1 May 2017
Form 4Statement of changes in beneficial ownership2 May 2016
Form 4Statement of changes in beneficial ownership7 Apr 2016
Form 4Statement of changes in beneficial ownership9 Jul 2015
Form 4Statement of changes in beneficial ownership1 May 2015
Form 3Initial statement of beneficial ownership6 Apr 2015

Stevens Timothy J(6)

Form 4PRIMARY DOCUMENT2 Jul 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT24 Jul 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 3PRIMARY DOCUMENT5 Dec 2008

PFEFFER HOWARD C(5)

Form 4PRIMARY DOCUMENT5 Dec 2003
Form 4PRIMARY DOCUMENT4 Sep 2003
Form 4PRIMARY DOCUMENT5 Jun 2003
Form 4PRIMARY DOCUMENT21 May 2003
Form 4Statement of changes in beneficial ownership6 Mar 2003

Smith Robert Sorenson(5)

Form 4PRIMARY DOCUMENT16 Jun 2010
Form 4PRIMARY DOCUMENT22 Oct 2009
Form 3PRIMARY DOCUMENT17 Jul 2009
Form 4PRIMARY DOCUMENT17 Jul 2009
Form 3/APRIMARY DOCUMENT17 Jul 2009

BULLIS EUGENE M(4)

Form 4Statement of changes in beneficial ownership1 May 2015
Form 4Statement of changes in beneficial ownership2 May 2014
Form 4OWNERSHIP DOCUMENT23 Dec 2013
Form 3OWNERSHIP DOCUMENT6 Jun 2013

MANDEL VICTOR E(4)

Form 4Statement of changes in beneficial ownership1 May 2015
Form 4Statement of changes in beneficial ownership2 May 2014
Form 4OWNERSHIP DOCUMENT23 Dec 2013
Form 3OWNERSHIP DOCUMENT10 May 2013

BIVONA FRANK J(3)

Form 4Statement of changes in beneficial ownership28 Jan 2003
Form 4Statement of changes in beneficial ownership5 Dec 2002
Form 4Statement of changes in beneficial ownership24 Oct 2002

MATANLE CATHLEEN(3)

Form 4OWNERSHIP DOCUMENT1 May 2013
Form 3/AOWNERSHIP DOCUMENT30 Nov 2012
Form 3OWNERSHIP DOCUMENT20 Nov 2012

METZ LAWRENCE F.(2)

Form 4Statement of changes in beneficial ownership25 Mar
Form 3Initial statement of beneficial ownership17 Dec 2025

Ahn Cristina E.(2)

Form 4Statement of changes in beneficial ownership25 Mar
Form 3Initial statement of beneficial ownership30 Sep 2025

Raab Gregory G(1)

Form 3PRIMARY DOCUMENT10 Mar 2009

BRUCE IAIN H(1)

Form 3OWNERSHIP DOCUMENT20 Nov 2012

≥5% Ownership

FMR LLC(17)

SC 13G/AAmbac Financial Group Inc10 Mar 2009
SC 13G/AAmbac Financial Group Inc17 Feb 2009
SC 13G/AAmbac Financial Group Inc10 Dec 2008
SC 13G/AAmbac Financial Group Inc10 Apr 2008
SC 13GAmbac Financial Group Inc14 Feb 2008
SC 13G/AAmbac Financial Group Inc14 Feb 2007
SC 13G/AAmbac Financial Group Inc10 Oct 2006
SC 13G/AAmbac Financial Group Inc14 Feb 2006
SC 13G/AAmbac Financial Group Inc14 Feb 2005
SC 13G/AAmbac Financial Group Inc10 Feb 2005

VANGUARD GROUP INC(16)

SC 13G/AOctave Specialty Group Inc27 Mar
SC 13G/AAmbac Financial Group Inc30 Apr 2025
SC 13G/AAmbac Financial Group Inc30 Jan 2025
SC 13G/AAmbac Financial Group Inc12 Nov 2024
SC 13G/AAmbac Financial Group Inc4 Nov 2024
SC 13G/AAmbac Financial Group Inc13 Feb 2024
SC 13G/AAmbac Financial Group Inc9 Feb 2023
SC 13G/AAmbac Financial Group Inc9 Feb 2022
SC 13G/AAmbac Financial Group Inc12 Apr 2021
SC 13G/AAmbac Financial Group Inc10 Feb 2021

BlackRock Inc.(12)

SC 13G/AAmbac Financial Group Inc22 Jan 2024
SC 13G/AAmbac Financial Group Inc26 Jan 2023
SC 13GAmbac Financial Group Inc20 Jan 2023
SC 13G/AAmbac Financial Group Inc27 Jan 2022
SC 13G/AAmbac Financial Group Inc25 Jan 2022
SC 13G/AAmbac Financial Group Inc26 Jan 2021
SC 13G/AAmbac Financial Group Inc4 Feb 2020
SC 13GAmbac Financial Group Inc10 Jan 2019
SC 13G/AAmbac Financial Group Inc7 Feb 2014
SC 13GAmbac Financial Group Inc28 Jan 2014

J P MORGAN CHASE & CO(10)

SC 13G/AAmbac Financial Group Inc9 Apr 2008
SC 13G/AAmbac Financial Group Inc28 Jan 2008
SC 13G/AAmbac Financial Group Inc2 Feb 2007
SC 13G/AAmbac Financial Group Inc8 Feb 2006
SC 13G/AAmbac Financial Group Inc28 Feb 2005
SC 13G/AAmbac Financial Group Inc12 Feb 2004
SC 13G/AAmbac Financial Group Inc13 Feb 2003
SC 13G/AAmbac Financial Group Inc12 Feb 2002
SC 13G/AAmbac Financial Group Inc10 Aug 2001
SC 13G/AAmbac Financial Group Inc12 Feb 2001

MORGAN J P & CO INC(7)

SC 13G/AAmbac Financial Group Inc10 Jan 2000
SC 13G/AAmbac Financial Group Inc12 Mar 1999
SC 13G/AAmbac Financial Group Inc22 Feb 1999
SC 13G/AAmbac Financial Group Inc13 Feb 1998
SC 13G/AAmbac Inc /De/9 Jul 1997
SC 13G/AAmbac Inc /De/31 Jan 1997
SC 13G/AAmbac Inc /De/15 Feb 1996

CITIGROUP INC(7)

SC 13G/AAmbac Financial Group Inc10 Aug 2010
SC 13G/AAmbac Financial Group Inc20 Jan 2010
SC 13GAmbac Financial Group Inc9 Feb 2009
SC 13G/AAmbac Financial Group Inc11 Feb 2005
SC 13G/AAmbac Financial Group Inc29 Jan 2004
SC 13G/AAmbac Financial Group Inc4 Feb 2003
SC 13GAmbac Financial Group Inc7 Feb 2002

WELLINGTON MANAGEMENT CO LLP(6)

SC 13G/AAmbac Financial Group Inc14 Feb 2007
SC 13G/AAmbac Financial Group Inc14 Feb 2006
SC 13G/AAmbac Financial Group Inc14 Feb 2005
SC 13G/AAmbac Financial Group Inc12 Feb 2004
SC 13G/AAmbac Financial Group Inc12 Feb 2003
SC 13GAmbac Financial Group Inc12 Feb 2002

DIMENSIONAL FUND ADVISORS LP(5)

SC 13G/AAmbac Financial Group Inc9 Oct 2025
SC 13GAmbac Financial Group Inc9 Feb 2024
SC 13G/AAmbac Financial Group Inc8 Feb 2019
SC 13G/AAmbac Financial Group Inc9 Feb 2018
SC 13GAmbac Financial Group Inc9 Feb 2017

PIONEER INVESTMENT MANAGEMENT INC /ADV(5)

SC 13G/AAmbac Financial Group Inc13 Nov 2000
SC 13G/AAmbac Financial Group Inc3 Jan 2000
SC 13G/AAmbac Inc /De/5 Jan 1998
SC 13G/AAmbac Inc /De/9 Jan 1997
SC 13G/AAmbac Inc /De/9 Aug 1996

BERNSTEIN SANFORD C & CO INC(5)

SC 13G/AAmbac Financial Group Inc8 Nov 2000
SC 13G/AAmbac Financial Group Inc8 Feb 2000
SC 13G/AAmbac Financial Group Inc5 Feb 1999
SC 13G/AAmbac Financial Group Inc4 Feb 1998
SC 13G/AAmbac Inc /De/30 Jan 1997

DAVIS SELECTED ADVISERS(4)

SC 13G/AAmbac Financial Group Inc13 Feb 2009
SC 13G/AAmbac Financial Group Inc10 Jun 2008
SC 13G/AAmbac Financial Group Inc12 Feb 2008
SC 13GAmbac Financial Group Inc5 Oct 2007

HARRIS ASSOCIATES L P(3)

SC 13G/AAmbac Financial Group Inc11 Feb 1998
SC 13G/AAmbac Inc /De/5 Feb 1997
SC 13G/AAmbac Inc /De/6 Feb 1996

HARRIS ASSOCIATES INVESTMENT TRUST(3)

SC 13G/AAmbac Financial Group Inc11 Feb 1998
SC 13G/AAmbac Inc /De/11 Feb 1997
SC 13G/AAmbac Inc /De/6 Feb 1996

GOLDMAN SACHS ASSET MANAGEMENT/(3)

SC 13G/AAmbac Financial Group Inc12 Feb 2003
SC 13G/AAmbac Financial Group Inc14 Feb 2002
SC 13GAmbac Financial Group Inc9 Feb 2001

THIRD AVENUE MANAGEMENT LLC(3)

SC 13GAmbac Financial Group Inc10 Feb 2010
SC 13GAmbac Financial Group Inc13 Feb 2009
SC 13GAmbac Financial Group Inc10 Sep 2008

GOLDMAN SACHS ASSET MANAGEMENT LP(3)

SC 13G/AAmbac Financial Group Inc27 Feb 2008
SC 13GAmbac Financial Group Inc7 Feb 2007
SC 13G/AAmbac Financial Group Inc11 Feb 2004

Raging Capital Management, LLC(3)

SC 13G/AAmbac Financial Group Inc14 Feb 2020
SC 13G/AAmbac Financial Group Inc14 Feb 2019
SC 13GAmbac Financial Group Inc14 Feb 2018

BANK OF AMERICA CORP /DE/(2)

SC 13G/AAmbac Financial Group Inc29 Jan 2009
SC 13GAmbac Financial Group Inc7 Feb 2008

STATE STREET BANK & TRUST CO(2)

SC 13G/AAmbac Financial Group Inc7 May 2008
SC 13GAmbac Financial Group Inc5 May 2008

PUTNAM LLC(2)

SC 13G/AAmbac Financial Group Inc13 Feb 2009
SC 13GAmbac Financial Group Inc1 Feb 2008

LEGG MASON CAPITAL MANAGEMENT INC(2)

SC 13G/AAmbac Financial Group Inc17 Feb 2009
SC 13GAmbac Financial Group Inc14 Feb 2008

OPPENHEIMER CAPITAL(2)

SC 13G/AAmbac Financial Group Inc12 Feb 2008
SC 13GAmbac Financial Group Inc14 Feb 2006

LIBERTY INVESTMENT MANAGEMENT INC/(2)

SC 13G/AAmbac Inc /De/25 Jul 1997
SC 13GAmbac Inc /De/24 Jul 1997

FIR TREE INC(2)

SC 13G/AAmbac Financial Group Inc9 Feb 2009
SC 13GAmbac Financial Group Inc8 Aug 2008

SUSQUEHANNA SECURITIES, LLC(2)

SC 13G/AOctave Specialty Group Inc13 Nov 2025
SC 13GAmbac Financial Group Inc14 Aug 2025

Western Standard LLC(2)

SC 13G/AOctave Specialty Group Inc11 May
SC 13GOctave Specialty Group Inc12 Feb

JANE STREET GROUP, LLC(2)

SC 13G/AOctave Specialty Group Inc11 May
SC 13GOctave Specialty Group Inc11 Feb

BlackRock, Inc.(2)

SC 13G/AAmbac Financial Group Inc17 Oct 2025
SC 13G/AAmbac Financial Group Inc3 Apr 2025

VANGUARD CAPITAL MANAGEMENT LLC(2)

SC 13G/AOctave Specialty Group Inc30 Oct
SC 13GOctave Specialty Group Inc31 Jul

STATE STREET RESEARCH ET AL(1)

SC 13G/AAmbac Inc /De/13 Feb 1996

METROPOLITAN LIFE INSURANCE CO/NY(1)

SC 13G/AAmbac Inc /De/1 Feb 1996

AMBAC INC /DE/(1)

SC 13G/AHcia Inc14 Feb 1997

CAPITAL GROUP INTERNATIONAL INC(1)

SC 13GAmbac Financial Group Inc12 Feb 2008

King Theodore Walker Cheng-De(1)

SC 13GAmbac Financial Group Inc5 Apr 2024

BlackRock Portfolio Management LLC(1)

SC 13GOctave Specialty Group Inc27 Oct

Insider Ownership

BIENSTOCK GREGG L(71)

Form 4PRIMARY DOCUMENT30 Jun 2010
Form 4PRIMARY DOCUMENT4 Feb 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT24 Nov 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4/AStatement of changes in beneficial ownership (amendment)2 Feb 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 5/APRIMARY DOCUMENT27 Jan 2009
Form 5PRIMARY DOCUMENT26 Jan 2009
Form 4PRIMARY DOCUMENT31 Dec 2008

LASSITER PHILLIP B(67)

Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT26 Feb 2007
Form 4PRIMARY DOCUMENT23 Feb 2007

Trick David(60)

Form 4Statement of changes in beneficial ownership6 Oct
Form 4Statement of changes in beneficial ownership13 Jul
Form 4Statement of changes in beneficial ownership25 Mar
Form 4Statement of changes in beneficial ownership5 Mar
Form 4Statement of changes in beneficial ownership3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Mar
Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025
Form 4Statement of changes in beneficial ownership14 Mar 2025

LeBlanc Claude(56)

Form 4Statement of changes in beneficial ownership6 Oct
Form 4Statement of changes in beneficial ownership13 Jul
Form 4Statement of changes in beneficial ownership25 Mar
Form 4Statement of changes in beneficial ownership5 Mar
Form 4Statement of changes in beneficial ownership5 Jan
Form 4/AStatement of changes in beneficial ownership (amendment)3 Oct 2025
Form 4Statement of changes in beneficial ownership3 Oct 2025
Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership11 Aug 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025

SHOBACK ROBERT G(52)

Form 4PRIMARY DOCUMENT2 Feb 2009
Form 4PRIMARY DOCUMENT30 Jan 2009
Form 4PRIMARY DOCUMENT28 Jan 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT23 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT10 Sep 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT10 Mar 2008

GENADER ROBERT J(51)

Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT2 Nov 2007
Form 4PRIMARY DOCUMENT30 Oct 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT30 Apr 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT15 Feb 2007
Form 4PRIMARY DOCUMENT6 Feb 2007

UHLEIN JOHN W(51)

Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT12 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT10 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007

DOYLE KEVIN J(49)

Form 4PRIMARY DOCUMENT4 Mar 2011
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT29 Jan 2008

Ksenak Stephen Michael(48)

Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025
Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership8 Aug 2024
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership11 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024

GANDOLFO THOMAS J(44)

Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT29 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT1 Nov 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT9 Mar 2007

CALLEN MICHAEL A(43)

Form 4PRIMARY DOCUMENT1 Dec 2010
Form 4PRIMARY DOCUMENT5 Jun 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT2 Jul 2008
Form 4PRIMARY DOCUMENT24 Jun 2008
Form 4PRIMARY DOCUMENT16 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008

Eisman Robert Bryan(43)

Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership11 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024
Form 4Statement of changes in beneficial ownership23 Feb 2024
Form 4Statement of changes in beneficial ownership9 Mar 2023
Form 4Statement of changes in beneficial ownership6 Mar 2023

Smith R Sharon(43)

Form 4Statement of changes in beneficial ownership6 Oct
Form 4Statement of changes in beneficial ownership13 Jul
Form 4Statement of changes in beneficial ownership25 Mar
Form 4Statement of changes in beneficial ownership5 Mar
Form 4Statement of changes in beneficial ownership14 Nov 2025
Form 4Statement of changes in beneficial ownership3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Oct 2025
Form 4/AStatement of changes in beneficial ownership (amendment)3 Mar
Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025

THEOBALD THOMAS C(42)

Form 4PRIMARY DOCUMENT9 Apr 2012
Form 4/APRIMARY DOCUMENT29 Feb 2012
Form 4PRIMARY DOCUMENT6 Jan 2012
Form 4/APRIMARY DOCUMENT10 Jan 2012
Form 4PRIMARY DOCUMENT19 Nov 2010
Form 4PRIMARY DOCUMENT24 May 2010
Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008

Wallis David W(41)

Form 4PRIMARY DOCUMENT28 Sep 2011
Form 4/AStatement of changes in beneficial ownership (amendment)22 Mar 2012
Form 4PRIMARY DOCUMENT22 Mar 2011
Form 4PRIMARY DOCUMENT4 Mar 2011
Form 4PRIMARY DOCUMENT17 Dec 2010
Form 4PRIMARY DOCUMENT24 Nov 2010
Form 4PRIMARY DOCUMENT2 Aug 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4/APRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT1 Feb 2010

RENFIELD MILLER DOUGLAS C(39)

Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007

Stein Jeffrey Scott(38)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership15 May 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025

MCKINNON WILLIAM T(37)

Form 4PRIMARY DOCUMENT29 Jan 2008
Form 4/APRIMARY DOCUMENT31 Jan 2008
Form 4PRIMARY DOCUMENT30 Jan 2008
Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT24 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT30 Oct 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT24 Jul 2007
Form 4PRIMARY DOCUMENT8 Jun 2007

CONSIDINE JILL M(35)

Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007

MCDONOUGH KATHLEEN A(35)

Form 4PRIMARY DOCUMENT28 Jan 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT14 Nov 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT20 Feb 2007
Form 4PRIMARY DOCUMENT20 Feb 2007
Form 4PRIMARY DOCUMENT6 Feb 2007
Form 4PRIMARY DOCUMENT31 Jan 2007

BARRANCO DAVID(35)

Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership11 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024
Form 4Statement of changes in beneficial ownership23 Feb 2024
Form 4Statement of changes in beneficial ownership9 Mar 2023
Form 4Statement of changes in beneficial ownership6 Mar 2023

WALLACE HENRY D G(34)

Form 4PRIMARY DOCUMENT23 Nov 2010
Form 4PRIMARY DOCUMENT27 May 2010
Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT10 Mar 2008

HAFT IAN DAVID(31)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

UNGER LAURA S(30)

Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007

GREGORY W GRANT(30)

Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007
Form 4PRIMARY DOCUMENT10 May 2007
Form 4PRIMARY DOCUMENT7 May 2007
Form 4PRIMARY DOCUMENT9 Mar 2007
Form 4PRIMARY DOCUMENT8 Dec 2006
Form 4PRIMARY DOCUMENT8 Sep 2006
Form 4PRIMARY DOCUMENT9 Jun 2006
Form 4PRIMARY DOCUMENT15 May 2006

LAMMTENNANT JOAN M(29)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

BOYLE DAVID L(28)

Form 4PRIMARY DOCUMENT3 Jun 2005
Form 4PRIMARY DOCUMENT6 May 2005
Form 4PRIMARY DOCUMENT3 May 2005
Form 4PRIMARY DOCUMENT2 May 2005
Form 4PRIMARY DOCUMENT26 Apr 2005
Form 4PRIMARY DOCUMENT4 Mar 2005
Form 4PRIMARY DOCUMENT16 Feb 2005
Form 4PRIMARY DOCUMENT3 Dec 2004
Form 4PRIMARY DOCUMENT3 Sep 2004
Form 4PRIMARY DOCUMENT3 Jun 2004

Leonard Sean T(28)

Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT2 Feb 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT23 Jul 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT10 Mar 2008
Form 4PRIMARY DOCUMENT7 Mar 2008

IGLESIAS LISA G(26)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership3 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

REILLY MICHAEL FRANCIS(21)

Form 4Statement of changes in beneficial ownership9 Mar 2021
Form 4Statement of changes in beneficial ownership8 Mar 2021
Form 4Statement of changes in beneficial ownership3 Mar 2021
Form 4Statement of changes in beneficial ownership4 Jan 2021
Form 4Statement of changes in beneficial ownership20 May 2020
Form 4Statement of changes in beneficial ownership6 Mar 2020
Form 4Statement of changes in beneficial ownership4 Mar 2020
Form 4Statement of changes in beneficial ownership6 Jan 2020
Form 4Statement of changes in beneficial ownership17 May 2019
Form 4Statement of changes in beneficial ownership5 Mar 2019

PRICE MICHAEL D(19)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership14 May 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025

PRIEUR C JAMES(19)

Form 4Statement of changes in beneficial ownership4 Jan 2023
Form 4Statement of changes in beneficial ownership3 Oct 2022
Form 4Statement of changes in beneficial ownership5 Jul 2022
Form 4Statement of changes in beneficial ownership16 May 2022
Form 4Statement of changes in beneficial ownership16 May 2022
Form 4Statement of changes in beneficial ownership5 Apr 2022
Form 4Statement of changes in beneficial ownership7 Mar 2022
Form 4Statement of changes in beneficial ownership2 Mar 2022
Form 4Statement of changes in beneficial ownership12 Nov 2021
Form 4Statement of changes in beneficial ownership10 Aug 2021

Matus Kristi Ann(19)

Form 4Statement of changes in beneficial ownership5 Oct
Form 4Statement of changes in beneficial ownership7 Jul
Form 4Statement of changes in beneficial ownership2 Apr
Form 4Statement of changes in beneficial ownership5 Jan
Form 4Statement of changes in beneficial ownership2 Oct 2025
Form 4Statement of changes in beneficial ownership30 Sep 2025
Form 4Statement of changes in beneficial ownership1 Jul 2025
Form 4Statement of changes in beneficial ownership2 Apr 2025
Form 4Statement of changes in beneficial ownership3 Jan 2025
Form 4Statement of changes in beneficial ownership1 Oct 2024

Herzog David L(16)

Form 4Statement of changes in beneficial ownership4 Apr 2023
Form 4Statement of changes in beneficial ownership4 Jan 2023
Form 4Statement of changes in beneficial ownership3 Oct 2022
Form 4Statement of changes in beneficial ownership5 Jul 2022
Form 4Statement of changes in beneficial ownership5 Apr 2022
Form 4Statement of changes in beneficial ownership2 Mar 2022
Form 4Statement of changes in beneficial ownership12 Nov 2021
Form 4Statement of changes in beneficial ownership10 Aug 2021
Form 4Statement of changes in beneficial ownership12 May 2021
Form 4Statement of changes in beneficial ownership1 May 2020

NADER TAVAKOLI(15)

Form 4Statement of changes in beneficial ownership20 Sep 2016
Form 4Statement of changes in beneficial ownership28 Jun 2016
Form 4Statement of changes in beneficial ownership15 Jun 2016
Form 4Statement of changes in beneficial ownership20 May 2016
Form 4Statement of changes in beneficial ownership7 Apr 2016
Form 4Statement of changes in beneficial ownership31 Mar 2016
Form 4Statement of changes in beneficial ownership8 Jan 2016
Form 4Statement of changes in beneficial ownership5 Jan 2016
Form 4Statement of changes in beneficial ownership15 Dec 2015
Form 4Statement of changes in beneficial ownership13 Nov 2015

Adams Diana(15)

Form 4Statement of changes in beneficial ownership22 Dec 2014
Form 4OWNERSHIP DOCUMENT23 Dec 2013
Form 4OWNERSHIP DOCUMENT1 May 2013
Form 4OWNERSHIP DOCUMENT29 Jan 2013
Form 4PRIMARY DOCUMENT4 Mar 2011
Form 4PRIMARY DOCUMENT22 Dec 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT24 Jul 2009
Form 4PRIMARY DOCUMENT28 Jan 2009
Form 4PRIMARY DOCUMENT27 Jan 2009

DULUDE RICHARD(14)

Form 4PRIMARY DOCUMENT3 May 2005
Form 4PRIMARY DOCUMENT4 Mar 2005
Form 4PRIMARY DOCUMENT3 Dec 2004
Form 4PRIMARY DOCUMENT3 Sep 2004
Form 4PRIMARY DOCUMENT3 Jun 2004
Form 4PRIMARY DOCUMENT6 May 2004
Form 4PRIMARY DOCUMENT31 Mar 2004
Form 4PRIMARY DOCUMENT5 Mar 2004
Form 5PRIMARY DOCUMENT6 Feb 2004
Form 4PRIMARY DOCUMENT5 Dec 2003

CAPORALI RENSO L(13)

Form 4PRIMARY DOCUMENT3 May 2005
Form 4PRIMARY DOCUMENT4 Mar 2005
Form 4PRIMARY DOCUMENT3 Dec 2004
Form 4PRIMARY DOCUMENT3 Sep 2004
Form 4PRIMARY DOCUMENT3 Jun 2004
Form 4PRIMARY DOCUMENT6 May 2004
Form 4PRIMARY DOCUMENT5 Mar 2004
Form 4PRIMARY DOCUMENT5 Dec 2003
Form 4PRIMARY DOCUMENT5 Dec 2003
Form 4PRIMARY DOCUMENT4 Sep 2003

McGinnis Daniel(12)

Form 4Statement of changes in beneficial ownership1 Oct 2025
Form 4Statement of changes in beneficial ownership9 Jul 2025
Form 4Statement of changes in beneficial ownership14 Mar 2025
Form 4Statement of changes in beneficial ownership10 Mar 2025
Form 4Statement of changes in beneficial ownership4 Mar 2025
Form 4Statement of changes in beneficial ownership15 Mar 2024
Form 4Statement of changes in beneficial ownership4 Mar 2024
Form 4Statement of changes in beneficial ownership1 Mar 2024
Form 4Statement of changes in beneficial ownership6 Mar 2023
Form 4Statement of changes in beneficial ownership2 Mar 2023

DEROSA PAUL R(11)

Form 4PRIMARY DOCUMENT6 Jan 2010
Form 4PRIMARY DOCUMENT5 Oct 2009
Form 4/APRIMARY DOCUMENT7 Jul 2009
Form 4PRIMARY DOCUMENT2 Jul 2009
Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT3 Apr 2009
Form 4PRIMARY DOCUMENT2 Apr 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 3PRIMARY DOCUMENT9 Jul 2008

Duff Philip N(11)

Form 4PRIMARY DOCUMENT7 May 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 4PRIMARY DOCUMENT5 Sep 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 4PRIMARY DOCUMENT5 Jun 2008
Form 3PRIMARY DOCUMENT8 May 2007
Form 4PRIMARY DOCUMENT7 Mar 2008
Form 4PRIMARY DOCUMENT7 Dec 2007
Form 4PRIMARY DOCUMENT6 Sep 2007
Form 4PRIMARY DOCUMENT8 Jun 2007

Greene Alexander David(11)

Form 4Statement of changes in beneficial ownership13 May 2021
Form 4Statement of changes in beneficial ownership1 May 2020
Form 4Statement of changes in beneficial ownership1 May 2019
Form 4Statement of changes in beneficial ownership1 May 2018
Form 4Statement of changes in beneficial ownership1 May 2017
Form 4Statement of changes in beneficial ownership2 May 2016
Form 4Statement of changes in beneficial ownership7 Apr 2016
Form 4Statement of changes in beneficial ownership9 Jul 2015
Form 4Statement of changes in beneficial ownership1 May 2015
Form 3Initial statement of beneficial ownership6 Apr 2015

Stevens Timothy J(6)

Form 4PRIMARY DOCUMENT2 Jul 2010
Form 4PRIMARY DOCUMENT2 Feb 2010
Form 4PRIMARY DOCUMENT24 Jul 2009
Form 4PRIMARY DOCUMENT27 Jan 2009
Form 4PRIMARY DOCUMENT5 Dec 2008
Form 3PRIMARY DOCUMENT5 Dec 2008

PFEFFER HOWARD C(5)

Form 4PRIMARY DOCUMENT5 Dec 2003
Form 4PRIMARY DOCUMENT4 Sep 2003
Form 4PRIMARY DOCUMENT5 Jun 2003
Form 4PRIMARY DOCUMENT21 May 2003
Form 4Statement of changes in beneficial ownership6 Mar 2003

Smith Robert Sorenson(5)

Form 4PRIMARY DOCUMENT16 Jun 2010
Form 4PRIMARY DOCUMENT22 Oct 2009
Form 3PRIMARY DOCUMENT17 Jul 2009
Form 4PRIMARY DOCUMENT17 Jul 2009
Form 3/APRIMARY DOCUMENT17 Jul 2009

BULLIS EUGENE M(4)

Form 4Statement of changes in beneficial ownership1 May 2015
Form 4Statement of changes in beneficial ownership2 May 2014
Form 4OWNERSHIP DOCUMENT23 Dec 2013
Form 3OWNERSHIP DOCUMENT6 Jun 2013

MANDEL VICTOR E(4)

Form 4Statement of changes in beneficial ownership1 May 2015
Form 4Statement of changes in beneficial ownership2 May 2014
Form 4OWNERSHIP DOCUMENT23 Dec 2013
Form 3OWNERSHIP DOCUMENT10 May 2013

BIVONA FRANK J(3)

Form 4Statement of changes in beneficial ownership28 Jan 2003
Form 4Statement of changes in beneficial ownership5 Dec 2002
Form 4Statement of changes in beneficial ownership24 Oct 2002

MATANLE CATHLEEN(3)

Form 4OWNERSHIP DOCUMENT1 May 2013
Form 3/AOWNERSHIP DOCUMENT30 Nov 2012
Form 3OWNERSHIP DOCUMENT20 Nov 2012

METZ LAWRENCE F.(2)

Form 4Statement of changes in beneficial ownership25 Mar
Form 3Initial statement of beneficial ownership17 Dec 2025

Ahn Cristina E.(2)

Form 4Statement of changes in beneficial ownership25 Mar
Form 3Initial statement of beneficial ownership30 Sep 2025

Raab Gregory G(1)

Form 3PRIMARY DOCUMENT10 Mar 2009

BRUCE IAIN H(1)

Form 3OWNERSHIP DOCUMENT20 Nov 2012

≥5% Ownership

FMR LLC(17)

SC 13G/AAmbac Financial Group Inc10 Mar 2009
SC 13G/AAmbac Financial Group Inc17 Feb 2009
SC 13G/AAmbac Financial Group Inc10 Dec 2008
SC 13G/AAmbac Financial Group Inc10 Apr 2008
SC 13GAmbac Financial Group Inc14 Feb 2008
SC 13G/AAmbac Financial Group Inc14 Feb 2007
SC 13G/AAmbac Financial Group Inc10 Oct 2006
SC 13G/AAmbac Financial Group Inc14 Feb 2006
SC 13G/AAmbac Financial Group Inc14 Feb 2005
SC 13G/AAmbac Financial Group Inc10 Feb 2005

VANGUARD GROUP INC(16)

SC 13G/AOctave Specialty Group Inc27 Mar
SC 13G/AAmbac Financial Group Inc30 Apr 2025
SC 13G/AAmbac Financial Group Inc30 Jan 2025
SC 13G/AAmbac Financial Group Inc12 Nov 2024
SC 13G/AAmbac Financial Group Inc4 Nov 2024
SC 13G/AAmbac Financial Group Inc13 Feb 2024
SC 13G/AAmbac Financial Group Inc9 Feb 2023
SC 13G/AAmbac Financial Group Inc9 Feb 2022
SC 13G/AAmbac Financial Group Inc12 Apr 2021
SC 13G/AAmbac Financial Group Inc10 Feb 2021

BlackRock Inc.(12)

SC 13G/AAmbac Financial Group Inc22 Jan 2024
SC 13G/AAmbac Financial Group Inc26 Jan 2023
SC 13GAmbac Financial Group Inc20 Jan 2023
SC 13G/AAmbac Financial Group Inc27 Jan 2022
SC 13G/AAmbac Financial Group Inc25 Jan 2022
SC 13G/AAmbac Financial Group Inc26 Jan 2021
SC 13G/AAmbac Financial Group Inc4 Feb 2020
SC 13GAmbac Financial Group Inc10 Jan 2019
SC 13G/AAmbac Financial Group Inc7 Feb 2014
SC 13GAmbac Financial Group Inc28 Jan 2014

J P MORGAN CHASE & CO(10)

SC 13G/AAmbac Financial Group Inc9 Apr 2008
SC 13G/AAmbac Financial Group Inc28 Jan 2008
SC 13G/AAmbac Financial Group Inc2 Feb 2007
SC 13G/AAmbac Financial Group Inc8 Feb 2006
SC 13G/AAmbac Financial Group Inc28 Feb 2005
SC 13G/AAmbac Financial Group Inc12 Feb 2004
SC 13G/AAmbac Financial Group Inc13 Feb 2003
SC 13G/AAmbac Financial Group Inc12 Feb 2002
SC 13G/AAmbac Financial Group Inc10 Aug 2001
SC 13G/AAmbac Financial Group Inc12 Feb 2001

MORGAN J P & CO INC(7)

SC 13G/AAmbac Financial Group Inc10 Jan 2000
SC 13G/AAmbac Financial Group Inc12 Mar 1999
SC 13G/AAmbac Financial Group Inc22 Feb 1999
SC 13G/AAmbac Financial Group Inc13 Feb 1998
SC 13G/AAmbac Inc /De/9 Jul 1997
SC 13G/AAmbac Inc /De/31 Jan 1997
SC 13G/AAmbac Inc /De/15 Feb 1996

CITIGROUP INC(7)

SC 13G/AAmbac Financial Group Inc10 Aug 2010
SC 13G/AAmbac Financial Group Inc20 Jan 2010
SC 13GAmbac Financial Group Inc9 Feb 2009
SC 13G/AAmbac Financial Group Inc11 Feb 2005
SC 13G/AAmbac Financial Group Inc29 Jan 2004
SC 13G/AAmbac Financial Group Inc4 Feb 2003
SC 13GAmbac Financial Group Inc7 Feb 2002

WELLINGTON MANAGEMENT CO LLP(6)

SC 13G/AAmbac Financial Group Inc14 Feb 2007
SC 13G/AAmbac Financial Group Inc14 Feb 2006
SC 13G/AAmbac Financial Group Inc14 Feb 2005
SC 13G/AAmbac Financial Group Inc12 Feb 2004
SC 13G/AAmbac Financial Group Inc12 Feb 2003
SC 13GAmbac Financial Group Inc12 Feb 2002

DIMENSIONAL FUND ADVISORS LP(5)

SC 13G/AAmbac Financial Group Inc9 Oct 2025
SC 13GAmbac Financial Group Inc9 Feb 2024
SC 13G/AAmbac Financial Group Inc8 Feb 2019
SC 13G/AAmbac Financial Group Inc9 Feb 2018
SC 13GAmbac Financial Group Inc9 Feb 2017

PIONEER INVESTMENT MANAGEMENT INC /ADV(5)

SC 13G/AAmbac Financial Group Inc13 Nov 2000
SC 13G/AAmbac Financial Group Inc3 Jan 2000
SC 13G/AAmbac Inc /De/5 Jan 1998
SC 13G/AAmbac Inc /De/9 Jan 1997
SC 13G/AAmbac Inc /De/9 Aug 1996

BERNSTEIN SANFORD C & CO INC(5)

SC 13G/AAmbac Financial Group Inc8 Nov 2000
SC 13G/AAmbac Financial Group Inc8 Feb 2000
SC 13G/AAmbac Financial Group Inc5 Feb 1999
SC 13G/AAmbac Financial Group Inc4 Feb 1998
SC 13G/AAmbac Inc /De/30 Jan 1997

DAVIS SELECTED ADVISERS(4)

SC 13G/AAmbac Financial Group Inc13 Feb 2009
SC 13G/AAmbac Financial Group Inc10 Jun 2008
SC 13G/AAmbac Financial Group Inc12 Feb 2008
SC 13GAmbac Financial Group Inc5 Oct 2007

HARRIS ASSOCIATES L P(3)

SC 13G/AAmbac Financial Group Inc11 Feb 1998
SC 13G/AAmbac Inc /De/5 Feb 1997
SC 13G/AAmbac Inc /De/6 Feb 1996

HARRIS ASSOCIATES INVESTMENT TRUST(3)

SC 13G/AAmbac Financial Group Inc11 Feb 1998
SC 13G/AAmbac Inc /De/11 Feb 1997
SC 13G/AAmbac Inc /De/6 Feb 1996

GOLDMAN SACHS ASSET MANAGEMENT/(3)

SC 13G/AAmbac Financial Group Inc12 Feb 2003
SC 13G/AAmbac Financial Group Inc14 Feb 2002
SC 13GAmbac Financial Group Inc9 Feb 2001

THIRD AVENUE MANAGEMENT LLC(3)

SC 13GAmbac Financial Group Inc10 Feb 2010
SC 13GAmbac Financial Group Inc13 Feb 2009
SC 13GAmbac Financial Group Inc10 Sep 2008

GOLDMAN SACHS ASSET MANAGEMENT LP(3)

SC 13G/AAmbac Financial Group Inc27 Feb 2008
SC 13GAmbac Financial Group Inc7 Feb 2007
SC 13G/AAmbac Financial Group Inc11 Feb 2004

Raging Capital Management, LLC(3)

SC 13G/AAmbac Financial Group Inc14 Feb 2020
SC 13G/AAmbac Financial Group Inc14 Feb 2019
SC 13GAmbac Financial Group Inc14 Feb 2018

BANK OF AMERICA CORP /DE/(2)

SC 13G/AAmbac Financial Group Inc29 Jan 2009
SC 13GAmbac Financial Group Inc7 Feb 2008

STATE STREET BANK & TRUST CO(2)

SC 13G/AAmbac Financial Group Inc7 May 2008
SC 13GAmbac Financial Group Inc5 May 2008

PUTNAM LLC(2)

SC 13G/AAmbac Financial Group Inc13 Feb 2009
SC 13GAmbac Financial Group Inc1 Feb 2008

LEGG MASON CAPITAL MANAGEMENT INC(2)

SC 13G/AAmbac Financial Group Inc17 Feb 2009
SC 13GAmbac Financial Group Inc14 Feb 2008

OPPENHEIMER CAPITAL(2)

SC 13G/AAmbac Financial Group Inc12 Feb 2008
SC 13GAmbac Financial Group Inc14 Feb 2006

LIBERTY INVESTMENT MANAGEMENT INC/(2)

SC 13G/AAmbac Inc /De/25 Jul 1997
SC 13GAmbac Inc /De/24 Jul 1997

FIR TREE INC(2)

SC 13G/AAmbac Financial Group Inc9 Feb 2009
SC 13GAmbac Financial Group Inc8 Aug 2008

SUSQUEHANNA SECURITIES, LLC(2)

SC 13G/AOctave Specialty Group Inc13 Nov 2025
SC 13GAmbac Financial Group Inc14 Aug 2025

Western Standard LLC(2)

SC 13G/AOctave Specialty Group Inc11 May
SC 13GOctave Specialty Group Inc12 Feb

JANE STREET GROUP, LLC(2)

SC 13G/AOctave Specialty Group Inc11 May
SC 13GOctave Specialty Group Inc11 Feb

BlackRock, Inc.(2)

SC 13G/AAmbac Financial Group Inc17 Oct 2025
SC 13G/AAmbac Financial Group Inc3 Apr 2025

VANGUARD CAPITAL MANAGEMENT LLC(2)

SC 13G/AOctave Specialty Group Inc30 Oct
SC 13GOctave Specialty Group Inc31 Jul

STATE STREET RESEARCH ET AL(1)

SC 13G/AAmbac Inc /De/13 Feb 1996

METROPOLITAN LIFE INSURANCE CO/NY(1)

SC 13G/AAmbac Inc /De/1 Feb 1996

AMBAC INC /DE/(1)

SC 13G/AHcia Inc14 Feb 1997

CAPITAL GROUP INTERNATIONAL INC(1)

SC 13GAmbac Financial Group Inc12 Feb 2008

King Theodore Walker Cheng-De(1)

SC 13GAmbac Financial Group Inc5 Apr 2024

BlackRock Portfolio Management LLC(1)

SC 13GOctave Specialty Group Inc27 Oct