Stemcor is a British steel trading company. The company is based in London, UK, and has 80 offices in 40 countries around the world, employing more than 1400 people.
In 2009 the company was ranked as the third largest privately owned company by turnover in the United Kingdom by The Sunday Times' Top Track 100 list.
The company does not own any steel producers, and the majority of the shares are held by the Oppenheimer family.
In 1951 Coutinho, Caro & Co (London) Ltd was established by Hans Oppenheimer and a German trading company, Coutinho, Caro & Co.
The German company was sold to J McDermott in 1984, and in 1985 Hans Oppenheimer died passing his 50% ownership of the London company to his children.
In 1987 Ralph Oppenheimer negotiated his family's purchase of the remaining 50% of the company.
Upon completion of the deal in February 1988 the London company name was changed to Stemcor, an abbreviation of STEel Marketing CORporation.