Dunnes Stores performed well in the latest supermarket share figures from Kantar Worldpanel in Ireland.
In the 12 weeks to July 20th, Dunnes posted an increase in sales of 2.6% compared to the same three month period last year, giving it a market share of 21.2%, a slight increase on its share last year.
Tesco is continuing to lose market share according to the figures.
Its sales were down 6.2% in the period bringing its share of the market from 27.5% to 25.6%.
SuperValu's combined market share is standing steady at around the 25% mark.
It acquired Superquinn in the past few months and now trades under the SuperValu brand.
Lidl and Aldi are both continuing their impressive growth streaks.
Both discounters achieved record market shares this period, with Lidl’s share now standing at 8.4%, while Aldi boasts an 8.3% share.
"Despite declining numbers of shoppers coming through its doors over the past year, Dunnes has managed to increase footfall levels within the past two months, largely by drawing in customers with branded promotions," Dave Berry, commercial director at Kantar Worldpanel explained.
"On the flip side to Dunnes’ branded success, SuperValu has seen a strong performance among its own brand products. Some 73.6% of Irish households shopped in SuperValu over the past 12 weeks - up an impressive 94,000 customers compared with last year," he added.