Weeden & Co. works to weed out information so it can provide clients with institutional equities trading, fixed income sales and trading, and research services. The firm specializes in difficult-to-execute transactions, serving some 1,500 institutional clients. Weeden's research division, which includes The Leuthold Group, produces a variety of analytical reports on equity and fixed-income markets. Research affiliates cover such sectors as technology, health care, biotechnology, and REITs. Brothers Frank and Norman Weeden founded the company in 1922, and the company has been employee-owned (more than 80%) since 1986. It has offices in Boston; Chicago; Greenwich, Connecticut; Minneapolis; and San Francisco.