 Elfun Trusts Trades, Portfolio, part of Boston-based State Street Global Advisors, disclosed this week that its top five trades during the first quarter included a new position in Regions Financial Corp. RF , Financial, a boost to its Air Products Chemicals Inc. APD , Financial holding, the closure of its Alexion Pharmaceuticals Inc. ALXN , Financial holding and reduced positions in Applied Materials Inc. AMAT , Financial and First Republic Bank FRC , Financial. 