Sam Eyde, (29 October 1866 - 21 June 1940) was a Norwegian engineer and industrialist born in Arendal.
Sam (Samuel) Eyde was son of a shipowner, and studied engineering in Berlin where he graduated in 1891. He then started his career in Hamburg, working with the railways, planning new lines, bridges and stations.
In 1897 he started his own business, Gleim & Eyde with his previous boss from Hamburg. He soon established offices in Kristiania (Oslo today) and Stockholm, and by the turn of the century his office was one of the largest in Scandinavia, with some 30 engineers.
Sam Eyde is best known for together with the scientist Kristian Birkeland establishing Norsk Hydro in 1905, the aim was to produce fertiliser with abundant Norwegian hydroelectrical power. Crucial to financing the new company was the Swedish Wallenberg family, that Eyde had got in contact with through his work in Sweden.
