Madison Dearborn-backed Amynta Group, a provider of property and casualty insurance services, completed the acquisition of the surety operations of Aspen Insurance, a provider of reinsurance and insurance coverage. Financial terms were not disclosed. "We are very excited to welcome Michael Toppi and the entire surety team to Amynta, forming the foundation of our surety practice. The business brings a well-established surety team with a proven underwriting track record and culture of delivering creative solutions for clients," Robert Giammarco, Amynta Group Chairman and CEO.