The story
KHS GmbH was established in 1993 from a merger involving Holstein & Kappert AG of Dortmund (founded in 1868) and Seitz-Werke GmbH (founded in 1887), which later became SEN AG, Bad Kreuznach.
Timeline:
1868: Holstein & Kappert (H&K) is founded in Dortmund, Germany
1887: Seitz-Werke (later SEN) is founded in Bad Kreuznach, Germany
1977-1982 H&K (100%) and SEN (90%) acquired by Klöckner-Werke AG, Duisburg, Germany
1993: H&K and SEN merge to form KHS Maschinen- und Anlagenbau AG, Dortmund, Germany
2007: Salzgitter AG acquires the majority share in Klöckner-Werke
2008: KHS Corpoplast, KHS Plasmax, and KHS Moldtec are integrated into the Salzgitter Klöckner-Werke GmbH
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2010: KHS AG becomes KHS GmbH
2011: KHS GmbH becomes a wholly owned subsidiary of Salzgitter Klöckner-Werke GmbH
From Wikipedia’s article on KHS GmbH, shared under CC BY-SA 4.0.5