Public companies also had varied success. Between 1936 and 1939, twenty public companies were formed, of which three failed. Between 1945 and 1951, thirty-five public firms were incorporated, six of which went out of business. Between 1936 and 1963, fiftyfour firms were incorporated, but at the end of 1963ออออ only thirtyfour remained in operation. The success of public companies continued to be erratic.

Data as of September 1991