RIYADH, Feb 2 (Reuters) - Saudi Aramco is likely to list its shares simultaneously on more than one exchange but this is still under evaluation, Energy Minister Khalid al-Falih said on Thursday.

Asked by reporters if Aramco would list first on the Saudi bourse and then on another exchange abroad, Falih said: "It will probably be done concurrently, but we have not announced. We are evaluating. All our options are open."

The planned listing next year of up to 5 percent of Aramco, expected to be the world's biggest initial public offer of shares, is a centrepiece of the Saudi government's plan to diversify the economy beyond oil.

(Reporting by Katie Paul; Writing by Rania El Gamal; Editing by Andrew Torchia) ((rania.elgamal@thomsonreuters.com; +971 562 160 434; Reuters Messaging: rania.elgamal.reuters.com@reuters.net))