On April 15, 2013, the Board of Directors of Alleghany Corporation appointed John L. Sennott, Jr. to serve as Senior Vice President of the company, effective April 16, 2013, and chief financial officer of the company, effective May 8, 2013. Mr. Sennott will succeed Roger B. Gorham, who will assume overall responsibility for the company's fixed income portfolio. Mr. Sennott, age 47, has over 26 years of experience in the insurance industry.

Mr. Sennott served as Executive Vice President and Chief Corporate Strategy Officer of Allied World Assurance Company Holdings, AG from January 2010 to April 2012. From October 2008 to January 2010, he served as the Chief Operating Officer of Allied World Insurance Company, a wholly-owned indirect subsidiary of Allied World. Prior to that, from March 2003 to October 2008, Mr. Sennott was the Chief Financial Officer and a member of the Board of Directors of Darwin Professional Underwriters Inc. and a wholly-owned indirect subsidiary of Allied World.

Prior to being acquired by Allied World in October 2008, Darwin was a wholly-owned indirect subsidiary of the Company. Mr. Sennott is a certified public accountant and began his career at Coopers & Lybrand.