ST. LOUIS--(BUSINESS WIRE)--Businesses throughout the Midwest and Southern U.S. have a new partner that can help them grow and thrive for generations to come. Co-founders William L. Willhite (Bill) and James G. Wilmsen (Jamie) today announced the formal launch of WILsquare Capital, a private equity firm formed to address the unique capital needs and growth opportunities of Midwestern and Southern businesses in the lower-middle market. Believing this sector requires a unique and differentiated a