According to Verdict Research, the acquisition means that Primark will leapfrog New Look and Matalan to control 2.6 per cent market share.
However, Primark is still a long way from rivalling dominant player George, which has 3.69 per cent of the value clothing market.
The value clothing market was worth£6.4 billion last year, according to Verdict, with the top seven retailers in the sector accounting for sales of£5.2 billion. The value sector accounts for nearly 20 per cent of the clothing sector as a whole.
ABF acquired the Littlewoods shops yesterday at a price of slightly more than£400 million. It intends to keep 48 stores and sell the remaining 72. New Look and Arcadia are both in the frame as possible buyers.