Figures from Kantar Worldpanel show its market share has risen to 24.9 per cent, outperforming Tesco which now stands at 24.7.
According to Kantar, SuperValu has registered 18 consecutive periods of footfall growth
Dunnes has also increased its sales, while discount retailers Aldi and Lidl recorded sales growth of 11.1 per cent and 9.7 per cent respectively.
