Lemonade, the New York-based start-up peer-to-peer insurer, has expanded its executive team by hiring four executives from AIG and Ace. Ty Sagalow, a 25-year veteran of AIG and more recently chief innovation officer at Zurich North America, has been named chief insurance officer. Sagalow left Zurich in 2011 to form Innovation Insurance Group, a consulting and broking firm for the bitcoin industry.