Wortmann AG is a German computer manufacturer, based in Hüllhorst, North Rhine-Westphalia.

Shortly after the foundation, they began marketing products under the Terra brand.

[4] Siegbert Wortmann, the founder, has been awarded the Order of Merit of the Federal Republic of Germany in 2007 for his work as an entrepreneur.

Despite the financial crisis, Wortmann saw an increase in turnover of 12% in 2009 and had a revenue of 350 million Euros and employed 350 people.

[6] Wortmann AG was one of sixteen regional companies that joined forces in 2020 to become OWL Sport & Event GmbH & Co. KG.