EE's current ownership structure isn't sustainable in the long-term, Orange Chief Executive Stéphane Richard has claimed.
The mobile broadband provider was formed in 2010 as a joint venture between Orange and T-Mobile, with the French and German operators each holding a 50 per cent share in EE.
However, there has long been talk of a stock market flotation, following initial talks in 2013. A full acquisition of the company from one of the owners may also be an option.
Speaking at the Morgan Stanley telecom, media and technology conference in Barcelona, Orange's Mr Stéphane suggested his firm would not continue to hold half of the EE shares with T-Mobile.
"In the mid-term future, we will have to think with the Germans about the evolution of EE," he stated.
Mr Stéphane added that "all options are open" with regards to the future of the firm - which has the UK's largest 4G network and offers the fastest mobile broadband speeds.
There are no concerns about EE as a viable business - it is a thriving company which continues to expand.
EE recently launched its own multi-platform TV service, allowing the company to offer quad-play broadband bundles to its UK customers.
Mr Richard said that, amid increased competition from other operators - such as BT and Vodafone - EE needs to be active in this convergent market.
He confirmed that Orange is happy with the performance of EE, adding that it represents a very attractive asset for both companies.
And with an estimated value of £10 billion, it is little wonder Orange and T-Mobile have considered selling shares on the open market.
This may still happen in the future, but according to Mr Richard, no decision is imminent.
"Don’t expect anything spectacular in the short-term," he added.