(Alliance News) - Amerisur Resources PLC said on Friday that multiple companies have expressed an interest in acquiring the firm during its formal sale process.
Amerisur said it is engaging with potential takeover parties "in a constructive and positive manner to achieve an outcome that maximises value for all our shareholders".
Shareholders were advised to take no action until the formal sales process was completed, however.
Part of the formal sales process includes a confidentiality agreement, the oil company said.
Amerisur put itself up for sale in July after it reported that there was interest in the company and its assets from other companies in the industry.
Since then, the company rejected a USD260 million takeover proposal from Paris-listed firm Etablissements Maurel & Prom SA. Maurel & Prom has a number of assets in Colombia, where Amerisur also operates.
Shares were up 7.2% at 19.00 pence each in London on Friday morning. Back in 2014, the stock traded as high as 64.50p.