Williamson was the senior partner and managed the actors and companies, while Musgrove was responsible for production, and Garner concentrated on finances.
After Williamson died in 1913, the company continued to operate under various managing directors, including Ward who resigned in 1922,[6] and for many years, Sir George Tallis, and then the five Tait brothers, Charles, John, James Nevin, Edward and Frank.
The firm continued to present musical comedy and operetta, including the extremely successful The Maid of the Mountains, beginning in 1917.
[7] The company's activities extended to London's West End, where it produced, among others, seasons of the musicals High Jinks (in 1916), and Mr. Cinders, together with the revue Coo-ee!
In 1937, New Zealand businessman Sir John McKenzie became chairman, and Ernest C. Rolls was appointed to the board and made managing director and principal producer of J. C. Williamson.
Following World War II, the company presented long-running productions of new American musicals, beginning with Annie Get Your Gun starring Evie Hayes which opened at Melbourne's His Majesty's Theatre in July 1947.