Ennstone, the troubled concrete and aggregates company, withdrew its shares from the market on Wednesday amidst fears over the solvency of its US subsidiary Ennstone Inc.

Ennstone Inc stopped making interest payments in December and has been in talks with its US creditors since then. Its liquidity position will “become critical” by the end of January if an agreement is not worked out with its US lenders, Ennstone plc said in a statement.