Spencer Klein has been recognized regularly as one of the world's leading M+A lawyers by International Financial Law Review, Legal 500 United States and The World’s Leading Lawyers for Mergers and Acquisitions: U.S. Expert Guide (Legal Media Group). He has been named a "New York Super Lawyer" by Law & Politics in each of 2006-2012. According to Legal 500 US 2011, Mr. Klein "is a true adviser and has a wealth of experience. He understands the legal intricacies, is always accessible, and is very respected by boards and senior management teams." In 2012, Legal 500 US referred to Mr. Klein as "one of the best deal lawyers in the country."