Ryerson global headquarters is proud to call Chicago home. The longest continually operated business in Chicago, Ryerson is built on over 170 years of innovation, ingenuity and hard work. Joseph T. Ryerson first opened his iron store in 1842 along the banks of the Chicago River. Today, our network of offices and facilities spans the globe. Our metal distribution and processing services span essential industries: heavy equipment, transportation, industrial equipment and energy are among those that rely on Ryerson.