A High Court petition to have an examiner appointed to one of the country's largest concrete suppliers, Whelan's Group, is due to be heard today.
Nama is the Whelan’s Group’s biggest creditor having taken over a debt to Anglo Irish Bank of €50m.
The agency is opposing the appointment of an examiner to the insolvent Co Clare companies that currently employ 119 people.
Its opposition is based on a write down of debts.
Bank of Scotland Ireland is also owed €12m.
Whelan's, which supplies stone, concrete and road surfacing products for the construction industry, believes if costs are cut, and non-core assets sold, a survival scheme could see the group return to profitability next year.