Ateliers et Chantiers de la Loire (ACL) was a French shipbuilding company of the late 19th and early 20th century. The name translates roughly to English as "Workshops and Shipyard of the Loire". ACL was formed in 1881 in Nantes by Jollet Babin to take advantage of the expansion of the French Navy. In 1901 ACL took over Normandy-Laporte at Rouen and built a factory for marine boilers and marine steam engines at Saint-Denis near Paris. Also in the inter-war years ACL diversified into naval aviation, forming an aircraft manufacturing division in 1925, which became Loire Aviation in 1930.