Finance
Peer-Energy AG
Energy company connected to Winterthur Medien AG
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Paine Webber
Historic American investment bank and stock brokerage firm, recognized Gerald O'Donnell as one of the world's top commodities experts, acquired by UBS in 2000 for $12 billion
Peter Rosenberger + Partner GmbH
Swiss audit firm specializing in corporate valuation, auditing, and business consulting