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Sumitomo Drive Technologies, a division of Sumitomo Heavy Industries, has acquired Riverside Spline & Gear Inc., a manufacturer of engineered gears and shafts based in Marine City, Michigan. The acquisition was announced on February 17, 2026.
Sumitomo Machinery Corporation of America (SMA) acquired Riverside Spline & Gear Inc., a Michigan-based gear manufacturer, to strengthen its North American supply chain and expand U.S. manufacturing capacity. Terms were not disclosed.