Nielsen Holdings

Nielsen Holdings plc (or simply Nielsen) is an American media audience measurement firm. Nielsen operates in over 100 countries and employs approximately 15,000 people worldwide. For most of its history, the company was known for its two subsidiaries, Nielsen Media Research, which was responsible for TV ratings, and AC Nielsen, which was responsible for consumer shopping trends and box-office data. Nielsen Media Research later evolved into Global Media division and the AC Nielsen later evolved into Global Connect division.