Michael Stock is an English songwriter, record producer, musician, and member of the songwriting and production trio Stock Aitken Waterman. He has been responsible for over a hundred top-40 hits in the UK, including 16 number ones, and is recognised as one of the most successful songwriters of all time by the Guinness World Records. As part of Stock Aitken Waterman in the 1980s and 1990s, Stock holds the UK record of eleven number-one records with different acts. On the UK singles chart, he has written 54 top-ten hits, including seven number ones.