In December 2009, Baker McKenzie won a landmark tax case against the U.S. Internal Revenue Service for Symantec Corporation. The IRS had claimed that the Veritas Software Corporation, which Symantec had subsequently acquired in 2005, owed over $1 billion in back taxes, penalties and interest as a result of Veritas' non-U.S. operations. Symantec took the case to the U.S. Tax Court where Baker & McKenzie argued that the IRS position was arbitrary, capricious and unreasonable. In an opinion by Judge Maurice Foley, the court decided in favor of Symantec.