Alder Sales Corporation (Alder's) was founded in September, 1935. The original founders were G. Alfred Alder, President and General Manager; Lindon B. Alder, Vice-president; Donald B. Alder, Secretary/Treasurer; George B. Alder, Board of Directors; and Gerald B. Alder, Board of Directors.

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In 1940, Alfred died and Lindon became the company's president and Donald took over as the company's general manager. In 1957, after Lindon passed away, Donald became the company's president and CEO in 1975. In 1962 Elsie L. Alder (Donald’s wife) became secretary of the company and remained an asset to the company until 1986 when she retired.