Aggreko said in a statement that the new structure would create a more balanced organisation, with each of the units accounting for 30-40% of group trading profit.
In his statement Mr Micalizzi said he had relied on "a sophisticated structure of service providers and market participants to conduct an ongoing due diligence of the bond transaction".
In a statement, they said the new proposals represented "a fundamental change to the governance structure which underpinned the agreed merger of equals" initially announced in February.
Yahoo, Softbank and Alibaba Group issued a joint statement Sunday that is clearly addressed at trying to calm the storm over the ownership structure of the online payments company Alipay.
In a statement, Xstrata's independent directors said the new proposals represented "a fundamental change to the governance structure which underpinned the agreed merger of equals" initially announced in February.