The data showed that Somerfield's tills had been ringing with an increase spend of £58.8m in its stores over the 12-week period to 9 September.
The total till spend for Tesco and Waitrose also rose by £57.4m and £12.5m, respectively, while Asda, Morrisons and Sainsbury all experienced a decline.
Asda's total till spend fell by £16.6m over the 12 weeks, while Morrisons' registered a drop of £11.6m. Sainsbury showed the largest level of decline, with shopper spend decreasing by £47.8m.
Tesco continues to storm ahead with a market share of 29.18% (up 0.9% on 2005) over the 12 weeks to 9 September, compared with Asda's 15.35% (down 0.3% on last year) and Sainsbury's 14.48% (up .1% on last year).
Somerfield's market share is up 0.2% on last year to 4.35%, while Morrisons is up 1.9% to 10.55%.