Katharina Lehmann

Blumer-Lehmann AG is a Swiss company that specializes in the planning, construction, and sale of wooden buildings. The private company is based in Gossau, Switzerland and has subsidiaries in Austria and Switzerland. The company was founded in 1875, and Katharina Lehmann has been the CEO of the company since 1996.

BLUMER TECHNO FENSTER AG engages in the manufacture and sale of wood, wood and metal, as well as plastic windows. It also offers window mullions and crossbar windows. The company was founded by Franz Bischofberger und Thomas Holderegger in 1997 and is headquartered in Waldstatt, Switzerland.

Precious Woods Holding AG produces and sells logs and sawn timber. The firm also engages in the sustainable management and use of tropical forest. It operates through the following segments: Sustainable Forestry in Brazil, Sustainable Forestry in Gabon, Trading and Carbon and Energy. The Sustainable Forestry in Brazil segment engages in the sustainable management of tropical forests and the processing of tropical timber in Brazil. The Sustainable Forestry in Gabon segment operates in the sustainable management of tropical forests and the processing of tropical timber in Gabon. The Trading segment engages in the trading of timber from external sources in Switzerland. The Carbon & Energy segment engages in the trading of certified emission reductions. The company was founded on December 17, 1990 and is headquartered in Zug, Switzerland.