W. R. Berkley is an insurance holding company. Co. operates in two segments of the property casualty insurance business: Insurance, which includes commercial insurance business, including excess and surplus lines, admitted lines and specialty personal lines throughout the U.S., as well as insurance business in the U.K., Continental Europe, South America, Canada, Mexico, Scandinavia, Asia and Australia; and Reinsurance and Monoline Excess, which provides reinsurance business on a facultative and treaty basis, primarily in the U.S., the U.K., Continental Europe, Australia, the Asia-Pacific region and South Africa.

Preferreds: WRB.PRA, WRB.PRB, WRB.PRC, WRB.PRD, WRB.PRE