Cornerstone Underwriting Partners (CUP) is a nationwide Underwriting Manager and Program Administrator headquartered in Naperville, IL.

• We distribute a diversified mix of specialty products through a select group of wholesalers, MGAs, and specialty insurance brokers.


• We develop proprietary programs and products for distribution through contracted CUP partner agents.


• We develop agency specific, customized programs for distribution through single source wholesalers/MGAs and specialty program agents.