Updates

** Shares of health insurer Centene CNC.N fall 3.1% to $63.18

** Co is offering a voluntary separation program to support employees who may be considering a transition, according to a company spokesperson

** Layoffs could follow if voluntary departures do not meet CNC's target, according to Bloomberg News, which reported the development earlier in the day

** CNC's Marketplace membership fell to 3.6 million in Q1 from 5.6 million a year earlier, according to CNC's Q1 results

** Including session's move, CNC up 53.5% YTD