Great American Insurance Group Announces the Retirement of Mark R. Lonneman, Sr.

Mark R. Lonneman

Posted: Tuesday, February 2, 2021 9:01 am

Associated Press |


Great American Insurance Group announces the retirement of Mark R. Lonneman, Sr., Divisional President of its Property & Casualty Group’s Risk Solutions Division, effective April 2021.

This press release features multimedia. View the full release here:

Mr. Lonneman began his 41-year career with Great American as a casualty underwriter in the Agricultural Excess & Surplus Lines operation. He later joined the Home Office Underwriting Department in 1985 and held positions of increasing responsibility in underwriting management roles.

In 2010, Mr. Lonneman was named Divisional President of the Specialty E&S Division. He assumed his current role in 2018, when he successfully led the merger of the Specialty E&S Division and American Empire Surplus Lines Insurance Company to form Great American Risk Solutions.

Mr. Lonneman will be succeeded by Brian D. DeSoto, Divisional Senior Vice President of Great American Risk Solutions. Mr. DeSoto joined Great American in 2008.

About Great American Insurance Group

Great American Insurance Group’s roots go back to 1872 with the founding of its flagship company, Great American Insurance Company. Based in Cincinnati, Ohio, the operations of Great American Insurance Group are engaged primarily in property and casualty insurance, focusing on specialty commercial products for businesses, and in the sale of traditional fixed and indexed annuities in the retail, financial institutions, broker-dealer and registered investment advisor markets. Great American Insurance Company has received an “A” (Excellent) or higher rating from the A.M. Best Company for more than 110 years (most recent rating evaluation of “A+” (Superior) affirmed October 20, 2020). The members of Great American Insurance Group are subsidiaries of American Financial Group, Inc. (AFG), also based in Cincinnati, Ohio. AFG’s common stock is listed and traded on the New York Stock Exchange under the symbol AFG.

View source version on

CONTACT: Diane P. Weidner, IRC

Vice President, Investor & Media Relations

American Financial Group, Inc.


Leave a Reply

%d bloggers like this: