Press release | September 3, 2025
Allianz Commercial Appoints Stewart as North American Head of Liability
Global insurer Allianz Commercial announced today that Mary Ann Stewart has been named Regional Head of Liability, North America, effective September 22, 2025. Based in Chicago, Stewart will report to Jenise Klein, Chief Underwriting Officer of Allianz Commercial North America, with a matrix into Alfredo Alonso, Global Head of Liability.
Allianz Commercial specializes in tailored solutions for complex risks, offering a comprehensive portfolio of commercial general liability and specialty liability insurance.
In this role, Stewart will be responsible for the strategic direction and management of Allianz Commercial’s North American Liability portfolio, which includes Excess Casualty, Construction Liability, and Environmental coverages across the US and Canada. Mary Ann will also oversee the direction, leadership, and talent development of all Liability underwriters across the U.S. and Canada.
Stewart joins from Markel where she held several roles over her seven years, most recently acting as Senior Director, Global Casualty Underwriting, within Markel’s casualty business line, driving portfolio management and strategy across Markel’s Casualty portfolio.
“Liability remains a core product for Allianz Commercial as we strive to be the most trusted commercial insurer to our customers across a broad range of solutions,” said Klein. “We are delighted to welcome Mary Ann to the Allianz North American team. Her exceptional expertise in both global and regional liability underwriting and strong leadership will be pivotal to our continued success in the region.”
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About Allianz Commercial
Allianz Commercial is the center of expertise and global line of Allianz Group for insuring mid-sized businesses, large enterprises and specialist risks. Among our customers are the world’s largest consumer brands, financial institutions and industry players, the global aviation and shipping industry, as well as family-owned and medium enterprises, which are the backbone of the economy. We also cover unique risks such as offshore wind parks, infrastructure projects or film productions.
Powered by the employees, financial strength, and network of the world’s #1 insurance brand Allianz, as ranked by Interbrand, we work together to help our customers prepare for what’s ahead: They trust us to provide a wide range of traditional and alternative risk transfer solutions, outstanding risk consulting and multinational services as well as seamless claims handling.
The trade name Allianz Commercial brings together the large corporate insurance business of Allianz Global Corporate & Specialty (AGCS) and the commercial insurance business of national Allianz Property & Casualty entities serving mid-sized companies. We are present in over 200 countries and territories either though our own teams or the Allianz Group network and partners. In 2025, the integrated business of Allianz Commercial generated around €17,3 billion in gross premium globally.
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