Lancashire Holdings and its wholly owned subsidiary Lancashire Insurance Company have entered into a $350m three-year letter of credit facility.
The letters of credit will be used to support obligations under reinsurance liabilities of Lancashire Insurance Company.
The facility also has a $75m sub-limit for revolving loans which will be used for working capital and other corporate purposes.
Neil McConachie, chief financial officer and chief operating officer, said: “We are very pleased to have these leading financial institutions showing their support for the Lancashire group.
"This facility boosts the long-term financial flexibility and strength we have committed to our clients.”