Greenberg's company, Starr International Co, also filed a lawsuit against the Federal Reserve Bank of New York, whose president at the time of the takeover was Timothy Geithner, now U.S. Treasury Secretary.
Once AIG's largest shareholder, Starr said the government took a roughly 80 percent stake in AIG and charged an "punitive" 14.5 percent on federal loans without seeking a shareholder vote, hoping to provide a "backdoor bailout" for AIG trading partners such as Goldman Sachs Group Inc.
It said the bailouts that began on September 16, 2008, violated shareholders' rights to due process and equal protection, and a Fifth Amendment ban against taking private property for public use without just compensation, known as the "takings clause."