Between 1975 and 1978, Reid was the manager of British rock group Queen.
For 28 years he was Elton John's manager. During the first five years they enjoyed an intimate relationship. Their professional relationship ended over a leaked letter from his accountants detailing John's spending, which was found by Benjamin Pell and published in the Daily Mirror. The ending of their business relationship in 1998 led to a legal action in 2000.