Glencore and Rio Tinto restart merger talks.

Glencore and Rio Tinto confirmed preliminary talks about a possible combination of some or all of their businesses, and Rio Tinto said the talks could include an all-share merger.

Glencore and Rio Tinto have restarted talks about a possible merger. Glencore confirmed a Financial Times report that the companies are in preliminary discussions about combining some or all of their businesses. Rio Tinto said the talks could include an all-share merger. The companies' market capitalizations were reported as about $67.44 billion for Glencore and $145.32 billion for Rio Tinto, and Rio Tinto previously rejected a Glencore proposal in 2014. Key points: - Glencore confirmed preliminary talks with Rio Tinto about a possible combination of some or all of their businesses. - Rio Tinto said the talks could include an all-share merger. - Reports describe the deal as potentially creating the world's largest mining company if completed. - Market capitalizations were reported as about $67.44 billion for Glencore and $145.32 billion for Rio Tinto. - In 2014, Rio Tinto rejected a prior merger proposal from Glencore. Summary: If completed as reported, a combination could create the world's largest mining company and would alter the industry's scale. The companies have presented these discussions as preliminary. Undetermined at this time.