In 1931, the firm split its investment banking business from its traditional brokerage business.[3]
In 1934, Cassatt began discussions with E.A. Pierce & Co., the largest brokerage firm in the U.S. at the time about a potential merger.[4] In 1935, these discussions resulted in a partnership between the two firms. As part of the deal, Cassatt transferred its brokerage business to E.A. Pierce and focused exclusively on investment banking and merchant banking.[5]
In the late 1930s, E.A. Pierce began discussions with Merrill Lynch about a potential merger. E.A. Pierce was struggling financially in the 1930s and was thinly capitalized.[6] Following the death of Edmund C. Lynch in 1938, Winthrop Smith began discussions with Charles E. Merrill, who owned a minority interest in E.A. Pierce about a possible merger of the two firms. On April 1, 1940, Merrill Lynch, E.A. Pierce & Cassatt was formed when the two firms merged and also acquired Cassatt & Co.[6]