 The company was highly successful in its first five years, purchasing a seat on the San Francisco Stock Exchange in 1928 and then opening an office in New York and purchasing a seat on the New York Stock Exchange in 1929.Although a relatively young company, Dean Witter survived Wall Street Crash of 1929 and the Great Depression, posting profits every year during the 1930s and into the 1940s.Dean Witter would lead his company until his death in 1969.