Vodafone (VOD), a U.K. mobile operator, is considering a sale of its 45% stake in a venture with Verizon Communications (VZ), according the London’s Sunday Times.

Verizon shares were up 25 cents at $49.27 early Monday. Shares of Vodafone jumped 2.41%, or 67 cents, to $28.70.

According to the report, Vodafone recently held a series of talks with Verizon over a sale of Vodafone’s shares in Verizon Wireless, a venture between the two companies.

Verizon and Vodafone declined to comment on the report.

Vodafone and Verizon reportedly discussed a range of options, including a merger of the two telecommunications giants or a partial sale of Vodafone’s stake. However, the report said Vodafone is leaning toward a complete sale, which could net the carrier $135 billion.

The newspaper, citing unnamed sources, added that a deal could happen as soon as this summer. It also noted that a $135 billion deal would be one of the largest corporate transactions of all time. AOL’s (AOL) takeover of Time Warner (TWX) in 2001 totaled $164 billion.

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