The European Commission is scrutinising around six tax opinions multinationals received in Ireland in the early 1990s, the same period in which it said one granted to Apple amounted to illegal state aid, Ireland's Sunday Business Post said.
Last week, European Union antitrust regulators ordered Apple to pay up to 13 billion euros ($14.5 billion) in taxes to the Irish government after ruling that Ireland granted undue and selective tax benefit to the company.
Apple denies that Dublin gave it any tax breaks, a view shared by Ireland's Office of the Revenue Commissioners, which assesses and collects taxes, and the Irish government, which on Friday agreed to join Apple in appealing the decision.
The Commission is now actively scrutinising multiple tax opinions given to multinationals in Ireland and focusing on around six that could lead to Apple-style investigations, the Sunday Business Post said, without quoting any sources.