Earthmaster tractors was initially based in Burbank, California. While specific corporate details are limited, it seems they began full-scale production around 1948. This production lasted until the mid-1950s, when the company was sold. By 1958, the remaining stock of Earthmaster tractors was acquired by Latham Feed in North Carolina. Latham may have assembled a small number of additional Earthmaster tractors from leftover parts, but production did not restart.