Pepsi, IKEA, AIG, Coach, Deutsche Bank, Abbott Laboratories and nearly 340 other companies have secured secret deals from Luxembourg that allowed many of them to slash their global tax bills. PWC involved.

see this link

The International Consortium of Investigative Journalists collaborated with more than 80 journalists in 26 countries in its Luxembourg Leaks investigation, exploring the secret tax deals global corporations have made with Luxembourg. For Belgium MO Magazine, De Tijd and Le Soir were involved in the investigation.PricewaterhouseCoopers has helped multinational companies obtain at least 548 tax rulings in Luxembourg from 2002 to 2010. These legal secret deals feature complex financial structures designed to create drastic tax reductions. The rulings provide written assurance that companies’ tax-saving plans will be viewed favorably by Luxembourg authorities.
Companies have channeled hundreds of billions of dollars through Luxembourg and saved billions of dollars in taxes. Some firms have enjoyed effective tax rates of less than 1 percent on the profits they’ve shuffled into Luxembourg.
Many of the tax deals exploited international tax mismatches that allowed companies to avoid taxes both in Luxembourg and elsewhere through the use of so-called hybrid loans.
In many cases Luxembourg subsidiaries handling hundreds of millions of dollars in business maintain little presence and conduct little economic activity in Luxembourg. One popular address – 5, rue Guillaume Kroll – is home to more than 1,600 companies.