The sale is part of a federal program to enhance capital levels at strong banks and spur lending to help ease the national financial crisis.
Like other banks in the program, Green Bay-based Associated Bank will pay the Treasury a 5 percent dividend for the first five years and 9 percent after that.
The Treasury also has the right to buy almost 4 million shares of Associated common stock for $19.77 per share in the future.
Associated is the second-largest bank based in Wisconsin.
Wisconsin's largest bank, Milwaukee-based Marshall & Ilsley Corp., sold more than $1.7 billion in preferred shares to the Treasury earlier this month.

