We have so far registered 4,509 shipyards
| Name | | Ulstein Verft A/S, Ulsteinvik |
| Ulvan Ship A/S, Sandstad |
| Umoe Mandal A/S, Mandal |
| UMOE Sterkoder A/S, Kr.sund N |
| Umo Gemi Sanayi Ve Ticaret Ltd. Sti., Ergeli, Tyrkia |
| Union Giesserei A/G., Köningsberg, Tyskland |
| Union Iron Works Co., Alameda, CA, USA |
| Union Iron Works Co, San Francisco, CA, USA |
| Union Naval de Levante SA, Valencia |
| Union S.B. Co., Baltimore, MD, USA |
| Unionwerke, Boizenburg am Elbe, Tyskland |
| United D.D.Mariners Harbor, New York |
| United Ship Yards, Montreal, Quebec, Canada |
| Universal Shipbuilding, Maizuru, Japan |
| Upper Clyde S.B. Ltd, Clydebank |
| Uraga Dock Co.Ltd., Uraga |
| Uraga Dock Co. Ltd., Yokosuka, Japan |
| Uraga Dock Ltd., Yokohama, Japan |
| Uraga Heavy Ind. Ltd., Yokohama, Japan |
| Uraga Heavy Ind. Ltd., Yokosuka, Japan |
| USA |
| Usuki Tekkosho, Saiki, Japan |
| Utska Shipyard & Wisla Shipyard, Gdansk |
| Vaagland Båtbyggeri A/S, Vågland |
| Vall & Moran v/ J. H. Moran, St. Martin, New Brunswick, Canada |
