The spin-off of that business however, which accounted for 7.4 percent of AIG’s pre-tax operating income in the first nine months of 2015, is unlikely on its own to appease Icahn, who is calling for AIG to break up into three separate businesses. The mortgage insurance business had revenue of $791 million in the first nine months of 2015. AIG is expected to discuss the future of the mortgage insurance business on Tuesday, when it releases its strategic plan, and the sources said this week the company will pursue a partial spin-off of the asset.