Heraeus is a German technology group with a focus on precious and special metals, medical technology, quartz glass, sensors and specialty light sources. Founded in Hanau in 1851, the company is one of the largest family-owned companies in Germany in terms of revenue. According to company statements, Heraeus generates product revenues of €3.4 billion and precious metals trading revenue of €12.2 billion on the strength of approximately 12,600 employees in more than 100 companies.