SuperValu, Aldi and Lidl are increasing their sales as other retailers lose their share of the retail market. Tesco is still the front runner in the market, despite losing share from 27.7% to 26% - as 87% of shoppers from the Republic shopped in its stores over the past 12 weeks.
But Kantar Worldpanel, which compiles the figures, says Supervalu has been the big winner.
It has increased its market share to 20.1% from 19.9% despite a slowdown in overall grocery spend.
Aside from discount retailers Aldi and Lidl, SuperValu is the only grocer in growth.
Mark Thomson is business unit director at Kantar Worldpanel. "SuperValu continues to maintain solid growth ahead of the market at 0.7%. It has benefitted from welcoming around 30,000 new customers to its stores, with 63% of the Republic of Ireland now doing their grocery shop with the retailer" he said.
"The store's increased prominence is key as 24 Superquinn stores convert to the SuperValu fascia this month" he added.
Dunnes and Superquinn have both lost ground with shares standing at 23.8% and 5.1% respectively, while the discounters continue to thrive.
Aldi has increased its share points by 1.3% to 7.2%, with Lidl holding 6.6% of the market.
The fall in prices across vegetables is still a contributing factor to the performance of the grocery market, as Newstalk's Business Editor Ian Guider explains.
