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Andrew Witty had been CEO of UnitedHealth Group for four years. Andrew Witty has resigned as chief executive of US health conglomerate UnitedHealth Group, as the company pulled its financial forecasts ...

GlaxoSmithKline’s (GSK) former chief executive Andrew Witty was yesterday announced as the new CEO of Optum – a US payer organisation which includes pharmacy benefits manager OptumRx. Witty, who ...