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Dentons advises Mitsui on the sale of its interest in Oman’s Blocks 3 and 4 and 9

December 12, 2025

London—Dentons has advised oil and gas exploration and production company Mitsui E&P Middle East on the sale of its 5% working interest in Block 9 and its 20% working interest in Block 3 & 4, both located onshore in the Sultanate of Oman, for US$148 million to Kistos Energy Middle East Limited, a wholly-owned subsidiary of Kistos plc.

Completion of the transaction is subject to customary governmental and regulatory approvals and partner consents.

Block 9, operated by Occidental Petroleum, covers two producing areas. Block 3 & 4, operated by CCED, comprises seven producing fields and cover approximately 29,000 km² in eastern Oman.

The Dentons team was led by energy partner Torquil Law and included Muscat-based partner Yasser Taqi, counsel Paul Flynn, senior associate Fatima Al Sabahi, associates Alexandra VelizarovaNada Al-Amri and Karina Chopra, and trainee solicitor Manya Jain.

Torquil Law, who led the Dentons transaction team, said: “It was great to work with Mitsui’s international M&A team and MEPME on this important deal. Our involvement in this transaction underscores the firm’s leading position in the Oil & Gas sector, as well as the strength of its international network.

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