Gilead Sciences Inc. is making a one-time $1.25 billion payment, with a commitment for a royalty that analysts predict could add as much $1.5 billion more, to Viiv Healthcare Ltd., in a deal designed to resolve all global pending or potential patent infringement claims relating to sales of HIV drug Biktarvy (bictegravir/emtricitabine/tenofovir alafenamide). The initial payment, recorded in the fourth quarter of 2021, put a significant dent in Gilead’s earnings per share but removes the uncertainty of a trial outcome and clears the way for future bictegravir-containing products.