Advisers to Deltic Group, which owns the Atik and Pryzm pub and nightclub chains, are seeking initial bids by Thursday, according to Sky News.
Deltic is in talks with accountancy firm BDO to identify new investors who could help avert its potential collapse.
The group, which has 2,000 employees and operates 52 bars and clubs across the UK, is under pressure to find a financial solution as it continues to suffer from enforced COVID-19 restrictions.
The company is privately owned by its management team, led by chief executive Peter Marks, and a number of other individual shareholders.