We most definitely hold UnitedHealth stock in multiple mutual funds.
The reason I didn't even blink when this news came out is I know the majority of that stock was bought under $200/share. A much smaller percentage in the $200-250 range. We stopped putting money in our retirement accounts at the beginning of 2020 and focused on cash.
This stock would have to go through a serious beat down before we actually lost money, could happen but I'm not sweating it.