Axel Hefer

trivago GmbH operates as a hotel and accommodation search platform. It offers online meta-search for hotels by facilitating consumers’ search for hotel accommodation through online travel agents, hotel chains, and independent hotels. The company was founded by Rolf Schrömgens, Malte Siewert and Peter Vinnemeier in 2005 and is headquartered in Dusseldorf, Germany.

Permira Beteiligungsberatung GmbH (Permira) is the German office of the leading European private equity firm. Established in Germany in 1986, the firm advises the Permira Funds on German, Swiss and Austrian investments and also works on international deals. Permira's customers include investment managers, public and corporate pension funds, governmental development agencies, insurance companies, charities, endowments and foundations and banks. In addition to the Frankfurt office, the firm has offices in Luxembourg, Madrid, Paris, New York, Guernsey, London, Milan, Stockholm and Tokyo.

Fußballclub Gelsenkirchen-Schalke 04 eV engages in the operation of a football club. The firm also manages youth academy and provides membership services. It offers football-related merchandise and accessories. The company was founded on May 4, 1904 and is headquartered in Gelsenkirchen, Germany.

OEP Capital Advisors LP is an Private Equity/Venture Capital firm founded by Dick Cashin in 2001. The firm is headquartered in New York with additional offices in Frankfurt and Amsterdam.