Santos Raises Papua LNG Stake as Exxon Takes Over

The bigger strategic change is the handover of operatorship from TotalEnergies to ExxonMobil PNG Antelope, with ExxonMobil set to hold 34.1% and run the project. That matters because Exxon already operates the neighboring PNG LNG venture, giving the combined development a common operator, potential construction synergies and a clearer path to use existing infrastructure. For a capital-intensive LNG project that has already been delayed by uneconomic contractor bids, operator alignment can be as important as geology.

Papua LNG is designed to tap the Elk-Antelope fields and produce about 5.6 million tonnes a year, largely for Asian buyers. TotalEnergies said project optimization and a renewed EPC tender have cut roughly $4 billion from costs since 2024, bringing estimated capital expenditure down to about $14 billion. That is a material reset for economics that had previously stalled the project and underscores how much discipline the industry now needs to sanction new LNG supply.

For Santos, the transaction raises long-dated LNG exposure at a time when the company is also bringing Barossa gas and the Pikka oil project toward production. A bigger Papua LNG stake would add about 19% to its expected share of output from the project, to roughly 1.2 million tonnes a year, strengthening its future LNG portfolio and increasing its weight in Papua New Guinea, where it already holds an interest in Exxon-operated PNG LNG.

Investors are likely to view the move through two lenses. The bull case is that Exxon’s operatorship and the lower cost base improve the probability of a final investment decision and eventual cash flow from a strategically located LNG asset close to Asia. The bear case is that the project is still conditional, exposed to regulatory timing, state back-in mechanics and the usual slippage that has dogged large LNG builds.

The stock market has already reflected Santos’ stronger LNG optionality: the shares have climbed sharply over recent months, and the latest close near A$8.35 leaves them trading well above the 50-day and 200-day moving averages. But the fundamental test remains whether Papua LNG can move from a paper restructuring to sanction and construction in 2026, because only then will the stake increase translate into earnings power rather than deferred capital.