The private equity firm has appointed accountancy group KPMG to carry out a strategic review, including looking at a possible sale or refinancing of Bargain Booze.
Press reports have suggested the chain would be valued at around £90 million.
Bargain Booze has been with ECI since January 2006, when the firm backed a management buyout for £63.5 million.
Joint managing director Matthew Hughes told OLN ECI had always been planning to review its involvement in the business after five years, and noted that it was business as usual at the chain.
ďIt is far too early to comment. KPMG have been instructed by ECI to test the market to see whether the timing is right to sell or whether the timing is right to refinance the company. Nothing has happened yet and it is far too early to talk in terms of who might be interested.Ē
It is not thought that any financial problems lie behind the review, as Bargain Booze has performed very successfully over the past five years. Last month the franchise chain reported pre-tax operating profits of £13.2 million, up 17.3% from £11.3 million the year before.