Paul Alois Zumbühl

Looser Holding AG engages in the acquisition and management of participating interests in firms. It also acquires, holds, and sells real estate properties. The company was founded in 1928 and is headquartered in Arbon, Switzerland.

MCAM Symalit AG manufactures fluoropolymer products. Its fluoroplastics are available as semi finished products in the form of laminates, thin sheets, rods, tubes and high purity tubes. The company products are used in high-tech applications such as in the chemical industry for corrosion protection. The company was founded in 1952 and is headquartered in Lenzburg, Switzerland.

Sarna Kunststoff Holding AG develops, manufactures, and distributes waterproofing membranes for flat and pitched roofs. The company provides air management systems and plastic components for automotive interiors as well as waterproofing material for construction projects. It has production plants in China, the Czech Republic, Germany, Mexico, Switzerland, the UK, and the US. The company was founded in 1979 and is headquartered in Sarnen, Switzerland.

Part of Interroll Holding AG, Interroll (Schweiz) AG is a Swiss company that manufactures handling systems. The private company is based in Sant'Antonino, Switzerland. The CEO of the company is Paul Alois Zumbühl.

Sarna Gruppe is a Swiss company that specializes in manufacturing polymer seals and waterproofing systems. The private company is based in Sarnen, Switzerland.