 Jana Partners Trades, Portfolio, a New York-based investment firm, disclosed this week that its top five trades during the first quarter included the reduction in its holdings in Perspecta Inc. PRSP , Financial and Encompass Health Corp. EHC , Financial, the closure of its position in Bloomin Brands Inc. BLMN , Financial and boosts to its stakes in Treehouse Foods Inc. THS , Financial and Laboratory Corp of America Holdings LH , Financial. 