Skadden Arps Slate Meagher & Flom LLP
Law firm credited with spearheading tax inversions boom
CME Group
Commodities trading; futures exchange
Nasdaq, Inc.
Provider of trading, clearing, exchange technology, regulatory, securities listing, information and public company services
Allegheny Energy, Inc.
Electric utilty company supplying electricity for residential and commercial use
Northwest Airlines
Minnesota based airline, acquired by Delta in 2008
EMC CORPORATION
Information technology
Exelon Corporation
Energy services, electric and nat gas distribution, and largest nuclear operator in US