Nigel Grainge began his career in the record business as a sales office assistant at Phonogram UK in 1970. After a promotion to US-affiliated labels manager, he was responsible for the marketing and chart success of many hits by acts such as Faron Young, The Detroit Emeralds, The Stylistics, Chuck Berry, Rod Stewart (switching "Maggie May" from an original 'B' side), and eventually became the company's head of A&R from 1974 to 1976. He directly signed Thin Lizzy, 10cc, The Steve Miller Band, and a worldwide license for the successful All Platinum label (hits by Shirley & Co, the Moments, etc.), among others, before deciding to leave and set up his own independent label, funded by Phonogram Inc., which distributed it.
By 1990, millions of records had been sold by O'Connor, the biggest success being "Nothing Compares 2 U" which hit number one in over 30 countries.
After EMI acquired Chrysalis Records in 1991, Grainge felt stifled by the corporate changes and requested to leave the company, and the label was folded into its parent.
With the acquisition of the EMI group by Universal in 2012, the ownership of the Ensign catalogue of artists was transferred to Parlophone/Warner Music Group,[3] and in 2016 Ensign and Chrysalis were acquired by Blue Raincoat Music.
Chris Hill continues to DJ in the London area, and Grainge relocated to Santa Monica, California in 2002, where he co-founded cultural search-engine TunesMap, owned by G. Marq Roswell, and[4] worked as a special advisor on the HBO series Vinyl.[5] He died, at age 70, on 11 June 2017.[6][7]