Oil company Aminex said its 1-for-6 open offer of 96.1m shares was oversubscribed by around 27%. Excess applications for shares will be scaled back on a pro rata basis, the company said.The company raised around £6m (gross) from the open offer, which was priced at 8p per share. The proceeds from the open offer, which will supplement the £20m the company raised from a placing of shares in February, will be used to advance the group's exploration activities in Tanzania, its development and exploration activities in the US and for ongoing corporate and working capital purposes.