The Holyoke Machine Company was an American manufacturer of industrial machinery, best known for its work in paper manufacturing equipment and water turbines. The company, formed in 1863, was founded by Nathan H. Whitten, T.C. Page, T. B. Flanders, Richard Pattee, and S. S. Chase, after the Holyoke Water Power Company's machine shop had been sold off. Stephen Holman, the company's treasurer, president, and largest shareholder during different times in its first decade, is credited as its founder, though the nature of his early involvement is not well documented. Holman would purchase the company's foundry works in Worcester in April 1873, a second manufacturing branch which remained open for several decades.