By SAMANTHA RUTT FOR DAILYMAIL.COM Published: 02:46, 17 January 2025 | Updated: 07:38, 17 January 2025 UnitedHealth Group has lost a staggering amount of money following the shocking December assassination of one of the healthcare company’s top executives, Brian Thompson.  UnitedHealth Group, the largest single health carrier in the United States, has lost an astounding