American National Bank renewed a contract with SEI ( SEIC) for its portfolio processing and accounting system. American National Bank is the largest independently owned bank with a trust department in the state of Colorado. Oaks, Pa.-based SEI is an investment services firm. American National Bank will use SEI's integrated portfolio management solution that will provide decision support, trade order management, trade execution and compliance and reporting services in a straight-through processing environment. The bank's mutual fund operations will be provided with a fully integrated trading, income processing and reconciliation environment by SEI. "We are very pleased to assist American National Bank in providing greater value and expanded service for their customers," said the company. "They are a long-standing and valued client, and we're glad to work with them in growing their business through our broadened relationship."