W. Murray Clark established the company that bears his name in 1950. Murray Clark was the son of Fred Clark who first became involved in the poultry industry in 1925 with the establishment of a chick hatchery in the basement of his home located west of Caledonia, Ontario. Murray grew up in the business and spent the early part of his career travelling extensively, working for various hatcheries as a chick sexer. When poultry and egg producers began a post war shift to mechanization, Murray decided to focus his efforts on supplying farmers with poultry production equipment.

The original site of W. Murray Clark Limited was in Caledonia on Edinburgh Square, a stones throw from the town hall. Murray operated out of a small barn in his back yard. The business offered the "Premier" line of poultry production equipment, which included nests for layers, water troughs, floor feeding systems, brooders, and the first pullet cages available in Canada. The company moved to a larger facility in 1953, and again in 1961 to a warehouse that housed the business until 1988, at which time the company built a new 16000 sq. foot facility on the outskirts of Caledonia where they are presently located.

Watering troughs were eventually replaced by "Johnson Cups" and "Hart Cups" which were distributed across Canada by W. Murray Clark. By 1985 the industry had followed the European trend to nipple style drinkers, and W. Murray Clark eventually became a major distributor for the Ziggity brand.

During the 70's, the company bought out National Ideal, makers of Premier cages, and began manufacturing cages in Caledonia. In 1981, W. Murray Clark signed an agreement to handle the Big Dutchman line of equipment which included cages, and production of the Premier cage was discontinued.

The company has grown into Ontario's leading supplier of cage systems for layers and pullets, floor feeding and watering systems for turkeys and broilers, ventilation equipment, and electronic monitoring systems.