The Tem group is a international medical technology company with its headquarter in Basel (Switzerland). In addition to the headquarter, the Tem group includes two companies in Munich, development and production sites in the USA and in UK and several sales offices worldwide.

Tem Innovations GmbH deals with the development and production of ROTEM® point-of-care diagnostic systems and reagents.
The Tem International GmbH handles the sales distribution, marketing and customer service. The global activities of both companies are coordinated from the global headquarters in Basel. Since its founding in 2000, the group now employs about 130 people worldwide.

In September 2016, the Tem Group was acquired by Instrumentation Laboratory, a Werfen company.