The news came as the 229-strong chain revealed that it had secured a£30 million injection of private funding, allowing it to buy 45 stores from Somerfield over the weekend.
Commercial director David Birchall is now acting managing director of the company, after it emerged today that Andrew Villars - who was only appointed in July - has left the business.
Villars had been appointed as successor to Paul Niklas, who quit suddenly after being installed by new owner Richard Kirk, who led the purchase of the chain from Somerfield in February.
In a statement, Kwik Save said that the additional funding had 'exceeded its original expectations' and that, as well as paying for the 45 former Somerfield stores, the funds would be spent on its 'growth strategy' and revamping its stores.
The chain was sold to the Back to the Future consortium in February.