UnitedHealthcare offers certain benefits to operations employees with voluntary buyouts if they resign by March 3. Those who decline may be reassigned or face layoffs if the company does not meet its resignation quota, according to an internal resource site. The company has not disclosed how many employees received buyout offers under the Voluntary Resignation Separation Program. The move follows a year of cost-cutting at UnitedHealth Group amid rising medical expenses and fallout from a cyberattack on its subsidiary, Change Healthcare. Shares closed up 2% Wednesday.