IANAL, but I would think the person who filed the takedown notice would be charged. AFAIK, even the automated mass-takedowns are in theory signed off by a lawyer. At least, there's someone named as responsible for it.
Actually, UMG could be charged; if it is convicted it would likely be fined.
(Proving that any given corporate officer had the requisite intent to commit a crime (the 'mens rea') is difficult to impossible, which is one reason why corporations can be tried in criminal court.)
