United Monolithic Semiconductors (UMS) was created in 1996, as a joint venture of Thales and EADS, to provide a European source of III-V technologies and products.
 
The Company has industrial facilities in Ulm, Germany and Orsay, France (headquarters), and sales offices in Totowa NJ,USA and Shanghaï, China.
In 2007, the head-count was 240 people, for sales of 41M€, serving four main markets around the world.

Those markets are:
- Telecommunication infrastructure,
- Automotive and ISM,
- Space,
- Security and Defense.