21st Century Insurance Co. in Woodland Hills has been upgraded to an A+ rating by A.M. Best, the world's oldest authoritative insurance rating and information source.
The new A+ (Superior) rating represents Best's recognition of 21st Century's improvement since the 1994 Northridge earthquake, which forced the company to liquidate $500 million of its investment portfolio. The company paid more than $1.1 billion in earthquake-related claims
