Aramco to transfer PRefChem stakes to Malaysia's Petronas

• The Iran war has effectively closed the Strait of Hormuz since late February, slashing crude flows to Asia and forcing Saudi output down roughly one-third in April from pre-war levels
• Full ownership gives Petronas flexibility to source crude beyond the Gulf to meet surging regional fuel demand, as Aramco had been supplying 50-70% of PRefChem's crude feedstock
• PRefChem operates a 300,000 barrels-per-day refinery and 3.4 million tonnes-per-year petrochemical complex in Johor state, producing jet fuel, gasoline and diesel

Summary

Saudi Aramco is transferring its equity stakes in Malaysia's PRefChem refining and petrochemical joint ventures to partner Petronas, ending their eight-year downstream partnership in Southeast Asia. The deal, announced May 25, will make PRefChem a wholly owned subsidiary of the Malaysian state energy company, though financial terms were not disclosed.

The transaction reflects shifting energy dynamics driven by the Iran war and the effective closure of the Strait of Hormuz since late February, which has severely disrupted crude flows to Asia. This conflict has forced refiners to reduce operations and created shortages of jet fuel, gasoline, and diesel—key products from PRefChem facilities.

Full ownership will enable Petronas to diversify crude sourcing beyond the Gulf and better address surging regional fuel demand. Meanwhile, Aramco has been forced to cut production significantly, with Saudi output falling roughly one-third in April from pre-war levels, according to OPEC secondary sources. Aramco had previously supplied 50-70% of PRefChem's crude feedstock.

PRefChem comprises two joint ventures—Pengerang Refining Company and Pengerang Petrochemical Company—operating an integrated complex in Johor state, southern Malaysia. The refinery has capacity of approximately 300,000 barrels per day, while the petrochemical facility has nameplate capacity of about 3.4 million tonnes annually. Aramco initially invested $7 billion in 2017 for equal participation in the project.

Both companies emphasized the deal was concluded on "mutually agreed terms, reflecting the evolving strategic priorities of both parties," and stated they will continue exploring cooperation in crude supply, technology exchange, and product distribution.