1st Source Corporation is an Indiana-based bank holding company that operates banking centers across Indiana, Michigan, and Florida, serving customers through a range of commercial, consumer, and specialty financial services. The company's core revenue comes from commercial banking (lending to businesses for equipment, real estate, and working capital), consumer banking (deposits, mortgages, and retail lending), trust and wealth management, renewable energy project financing across the continental United States, and a specialty finance group that provides equipment leasing nationwide across construction, aircraft, truck, and vehicle segments, along with an insurance services division. The company competes on relationship quality, service responsiveness, product breadth, and pricing within a competitive landscape of banks, credit unions, finance companies, and investment firms.