Sigh. You mean you still don't know SI? SI Financial Group is the holding company for Savings Institute Bank and Trust Company, a community savings bank serving eastern Connecticut from around 20 locations, including branches within retail stores. In addition to traditional deposit services like checking and savings accounts and CDs, the bank and its subsidiaries offer financial services such as trust services, investment management, retirement planning, and life insurance. Residential and commercial mortgages dominate Savings Institute's lending portfolio, which also includes commercial business and consumer loans. Mutual holding company SI Bancorp owns more than 60% of SI Financial Group.