United Insurance acquires 81% stake in Applied Underwriters, a workers’ compensation insurer that has been stuck under a cloud of multiple regulatory investigations from Berkshire Hathaway. Financial terms are not disclosed. One of the largest sellers of workers’ compensation insurance in the US, Applied Underwriters has been accused of being a “reverse Ponzi scheme” in a pending civil suit filed in 2016 by ex-clients - an accusation the company has denied.