Key: '~' indicates a manufacturer for whom no known products survive. •
Advance Thresher Co. –
later merged with the M. Rumely Co. to create Advance-Rumely Thresher Co. •
Advance-Rumely Thresher Co., La Porte, Indiana • ~Althaus Ewing & Co. • ~American Engine Co. •
American-Abell Engine and Thresher Company,
Toronto,
Ontario : Amongst other models, built three-wheelers with a single wheel mounted on a fork perch bracket beneath the smokebox. • Ames Iron Works • ~Atlas Engine Works • Aultman Co. • Aultman-Taylor Machinery Co. •
Avery Power Machinery Co., Peoria, Illinois •
A.D. Baker Company •
Best Manufacturing Company, San Leandro, California • Birdsall Engine Co. • Blumentritt Co. •
Buffalo-Pitts Steam Roller Co. •
Buffalo-Springfield Roller Co. • ~Byron, Jackson Machine Works •
Case, J.I. Co. • Colean Mfg. Co. • C & G Cooper & Co's. • Crowel Mfg. Co. • Clyde Iron Works Co., Duluth, MN •
D. June & Co. • ~Davidson & Rutledge • Farquhar, A.B. Co. • ~Fishkill Landing Machine Co. •
Frick & Co. •
Gaar Scott & Co. •
Geiser Manufacturing, makers of the Peerless line of steam tractors, later bought out by Emerson-Brantingham • ~George W. Morris • ~George Page & Co. • George White & Sons Co. Ltd., London and Brandon, Canada. • Greyhound, Banting Mfg. Co. • Groton, Charles Perrige & Co. • ~Hagerstown Steam Engine & Machine Co. • ~Harrisburg Car Mfg. Co. • Harrison Machine Works (Jumbo) • Heilman Machine Works • ~
Holt Manufacturing Company (became Caterpillar Inc.) • ~Hooven, Owens & Rentschler Co. •
Huber Manufacturing Co. • Illinois Thresher Co. • ~Jacob Price • ~James Means & Co. • John Goodison Thresher Co. Ltd., Sarnia, Ontario, Canada • ~J.M. Ross & Sons, St. Catharines, Ontario, Canada. •
Keck-Gonnerman Co., Mount Vernon, Indiana • O.S. Kelly Co., Springfield, Ohio • Kitten, Ferdinand Foundry Co. • ~Koppes W.M. & Co. • Lang & Button Co., Ithaca, New York • Lansing Iron Works Co. Lansing, Michigan • Leader, Marion Mfg. Co., Marion, Ohio • MacDonald Thresher Co., Stratford, Ontario, Canada • McNamer Co., Newark, Ohio • ~Merritt & Kellogg, Battle Creek, Michigan • ~Messinger Mfg. Co., Tatamy, Pennsylvania •
Minneapolis Threshing Machine Co., Hopkins, Minn. • ~Morningstar Mfg. Co. (Napoleon), Napoleon, Ohio • ~Muncy Traction Engine Co., Muncy, Pennsylvania • New-Giant, Northwest Thresher Co., Stillwater, Minn. • New Hamburg Mfg. Co. Ltd., New Hamburg, Ontario, Canada •
Nichols & Shepard Co., Battle Creek, Michigan • ~Ohio Engine & Thresher Co., Upper Sandusky, Ohio • ~Owens, Lane & Duyer Co., Hamilton, Ohio • Peerless, Geiser Mfg. Co., Waynesboro, Pennsylvania • Peterson N. C. & Sons, Sarnia, Ontario, Canada •
Port Huron Engine & Thresher Co., Port Huron, Mich. •
Reeves & Co., Columbus, Indiana • ~Remington Co., Woodburn, Oregon • Robert-Bell Engine & Thresher Co., Seaforth, Ontario, Canada • ~Roberts & Dean Co., Sacramento, California • Robinson & Co., Richmond, Indiana • M Rumley Co., LaPorte, Indiana –
later merged with the Advance Thresher Co. to create Advance-Rumely Thresher Co. •
Russell & Company (Steam Tractor), Massillon, Ohio (1848–1962) • ~Ryan & McDonald, Waterloo, New York • Sawyer-Massey & Co. Ltd., Hamilton, Ontario, Canada
after merger with Harris to form Massey-Harris later became Massey Ferguson • Scheidler, R. Co., Newark, Ohio • Springfield Engine & Thresher Co., Springfield, Ohio (later became OS Kelly Co and Kelly Springfield) • Stevens, A. W. & Son Co., Auburn, New York • Stevens, A. W. Co., Marinette, Wisconsin • Twentieth Century Mfg. Co., Marinette, Wisconsin • ~Union-Iron Works (Walker), Newark, Ohio • Upton Mfg. Co., Port Huron, Michigan •
Waterloo Mfg. Co. Ltd., Waterloo, Ontario, Canada •
Waterous Engine Works Co. Ltd., Bradford, Ontario, Canada • Watertown Engine Company, Watertown, New York • Westinghouse Co., Schenectady, New York
Westinghouse Farm Engine • Wood Brothers Thresher Co., Des Moines, Iowa • Wood, S.W. & Son Co., Clyde, New York • Wood, Taber & Morse Co., Eaton, New York ==Rest of the world==