Debevoise Advises Alliant in Acquisition of Mesirow Insurance Services

13 July 2016

Debevoise & Plimpton LLP is advising Alliant Insurance Services, the nation’s largest specialty insurance brokerage firm, in its acquisition of Chicago-based Mesirow Insurance Services (MIS). A division of Mesirow Financial, MIS is one of the Midwest’s leading independent insurance agencies, bringing a diverse client base, extensive suite of resources, and proven team of professionals under the Alliant banner.

Headquartered in Newport Beach, CA, Alliant Insurance Services, Inc. is one of the largest insurance brokerage firms in the United States and has a history dating back to 1925. Alliant provides property and casualty, workers’ compensation, employee benefits, surety, and financial products and services to more than 26,000 clients nationwide, including public entities, tribal nations, healthcare, energy, law firms, real estate, construction, and other industry groups. More information is available on the company’s website at

The Debevoise team is led by partners Jeffrey J. Rosen and Uri Herzberg and includes partner Elizabeth Pagel Serebransky and associates Usman Arain, Malinda R. Bridges-Sampson, Brooke A. Fodor, Simone S. Hicks, Ramya S. Tiller and Aaron Christopher West.

Debevoise & Plimpton LLP is a premier law firm with market-leading practices, a global perspective and strong New York roots. We deliver effective solutions to our clients’ most important legal challenges, applying clear commercial judgment and a distinctively collaborative approach.