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Clyde & Co, a global law firm headquartered in London •
Clyde Engineering, a defunct Australian manufacturer of locomotives, rolling stock, and other industrial products •
Clyde Iron Works, a Scottish-based ironworking plant from 1786 to 1978 •
Clyde Steamship Company, a defunct American transportation company •
WW Clyde, a heavy construction company based in Orem, Utah, United States •
Puma Clyde, a line of shoes released by Puma in 1973 •
Clyde Hotel, Portland, Oregon, United States, on the National Register of Historic Places == Education ==