Dunnes Stores has again declined to comment on reports that it is convening senior managers for a significant announcement today.
On Tuesday, the Mandate trade union, which represents around 5,000 of Dunnes' 18,000 employees, called on the company to clarify whether there were plans to sell the company.
Rumours had circulated that the retailer, which accounts for around 25% of the Irish grocery market and also has significant clothing and home furnishing operations, might be sold.
Speculation has focused on the Walmart-owned chain ASDA as a potential purchaser.
On Tuesday, ASDA dismissed the suggestion as 'market speculation and rumour'.
Some market observers have also greeted the reports with scepticism, saying they have seen such stories come and go before.
