October 2004: Mr. Spitzer files fraud and antitrust charges against Marsh & McLennan Cos. Inc.

MMC replaces Jeffrey W. Greenberg as chief executive officer with Michael G. Cherkasky, former CEO of MMC's Marsh Kroll consulting unit. That move, along with MMC's adoption of new business procedures, a full examination of potential prior wrongdoing and a pledge of restitution to those harmed, permits "Marsh and this office to move forward toward a civil resolution of our lawsuit," Mr. Spitzer says.

January 2005: Mr. Spitzer settles charges with MMC for $850 million.

March 2005: Mr. Spitzer simultaneously sues and settles fraud and anti-competitive practices charges against Aon Corp. for $190 million.

March 2005: Maurice R. Greenberg steps down as CEO of American International Group Inc. amid increased scrutiny by Mr. Spitzer concerning Mr. Greenberg's role in a finite reinsurance deal.

April 2005: Willis Group Holdings Ltd. settles steering allegations by Mr. Spitzer for $50 million.

May 2005: Mr. Spitzer sues AIG, Mr. Greenberg and former AIG Chief Financial Officer Howard I. Smith, charging them with orchestrating fraudulent transactions to manipulate the insurer's financial results.

February 2006: AIG agrees to pay $1.6 billion to settle civil fraud charges brought by Mr. Spitzer and others.

March 2006: Zurich Financial Services Group Inc. agrees to pay $153 million to resolve allegations of bid rigging and improper use of finite reinsurance brought by Mr. Spitzer and other officials.

April 2006: ACE Ltd. agrees to settle charges of bid rigging and finite reinsurance-related charges by Mr. Spitzer

May 2006: Mr. Spitzer sues Liberty Mutual Group Inc., alleging steering and bid rigging.

May 2006: Hartford Financial Services Group Inc. agrees to pay $20 million to settle charges from Mr. Spitzer and others over its compensation of brokers placing group annuity business.

August 2006: St. Paul Travelers Cos. Inc. agrees to pay $77 million to settle bid-rigging and other charges leveled by Mr. Spitzer and others.

November 2006: UnumProvident Corp. agrees to pay $17.4 million to settle charges by Mr. Spitzer and others over its compensation practices.