Hannes Winkler

TRIGAMMA Vermögensverwaltung GmbH operates as a holding company, which engages in the management of participating interests in firms. It also provides financial management services for associated enterprises. The company was founded by Ernst Lemberger and Hannes Winkler in 1989 and is headquartered in Vienna, Austria.

Part of TRIGAMMA Vermögensverwaltung GmbH, ÖAG AG is a bathroom and energy service manufacturer-neutral wholesaler based in Vienna, Austria. The Austrian company provides competent advice, installer service center (ISZ) networking, trends, and innovations container service, shelving system, and other service solutions for plumbing, heating, and raw installation. ÖAG AG also offers numerous ÖAG solutions as additional services. ÖAG AG was acquired by Frauenthal Holding AG from Ferguson Holdings Ltd. on June 30, 2014 for $31.79 million.

Frauenthal Airtank Elterlein GmbH is the largest producer of air tanks, with a market share of over 80%. Frauenthal Airtank Elterlein GmbH is based in Elterlein, Germany. The German company offers internships and holiday work opportunities for students to gain insights into various professions. Air tanks are used in air brake systems to store compressed air for ensuring necessary braking functions. It was founded in 1990, and the CEOs are Daniel Kratzsch and Mikael Mårtensson.

Ventana Holding GmbH operates as a private holding company. The company was founded in 1999 and is headquartered in Vienna, Austria.