James Lancaster, co-founder and non-executive director of the leading retail group, has stepped down from his role with immediate effect.
Lancaster co-founded the group back in 1973, becoming chief executive in 1990 and then chairman and chief executive in 1995.
Under his direction McColl's has grown to be the largest independent neighbourhood retailer in the UK.
James led a management buyout of the business in 1995, a secondary buyout in 2005 and IPO in 2014.
In July 2014 he relinquished the role of chairman to focus on his role as chief executive and between 1 April 2016 and 27 April 2017 he held the position of non-executive chairman before stepping down into the role of non-executive director.
Angus Porter, chairman of the board, said: "On behalf of the board, I want to thank James for his enormous contribution to McColl's over the years.
“Under his direction and guidance, he has helped grow McColl's into one of the largest independent neighbourhood retailers in the UK.
“We wish him all the best with his future endeavours."
Lancaster, said: "I am extremely proud of the business I co-founded over 40 years ago, but it is now the right time for me to stand down.
“I have every confidence that under the stewardship of the board, and in the capable hands of Jonathan Miller and his superb management team, McColl's will continue to thrive.
“I wish the group all the best for the future."