Hong Kong-listed Noble has been hunted by short sellers amid conjecture about the company’s accounts – which it has branded "malicious” and “misleading”.

Klein, who was influential in the merger of Glencore and Xstrata, is reviewing options such as the raising of secure financing and the selling of a stake in the company, Bloomberg says.

Noble revealed last week as it shot down fears surrounding a bond repayment that it had been approached by parties offering potential financing and strategic investment.

Yesterday, Noble reported a profit of $169m for the first half of 2015, against the $218m at the same point a year ago as its gas business was boosted by one off conditions. Its results had been brought forward following the bond reports.

Yusuf Alireza, CEO of Noble Group, said: “It is very pleasing that we have continued to build the profitability and diversity of our core businesses, especially in the light of the challenging market conditions.”