ムーディーズ
Nielsen went in for an IPO () in January 2011 and was the largest public offer in the United States in the previous four years. Being the largest IPO for a firm backed by private equity at $1.64 billion, the IPO was well received and closely watched by all big banks and private equity boutiques On March 1, 2011 they announced the appointment of Liz Zale as Senior Vice President for Investor Relations. Liz Zale was previously Vice President for Investor Relations at Moody's Corporation ().