Caturus LLC, the operator of the Commonwealth LNG project in Louisiana, has announced plans to add five liquefaction trains to its original design, expanding total capacity to approximately 17.25 million tonnes per annum (MMtpa), it is reported. The announcement was made on September 16, 2026.
Commonwealth LNG was originally designed with six trains and a capacity of 9.5 MMtpa, having already reached final investment decision (FID) and moved into construction. This announcement covers plans to add five trains with 7.75 MMtpa of capacity, roughly doubling the project’s total size to 17.25 MMtpa. Strategic investors reportedly include Kimmeridge, Mubadala Energy and the Canada Pension Plan Investment Board (CPPIB).
Financing for the base project (9.5 MMtpa) exceeds $9 billion (approximately $9.75 billion), and construction is already underway following FID. Of the base volume, 8.5 MMtpa is reported to already be under long-term sales agreements, with startup targeted for 2030. The newly announced expansion (five trains, 7.75 MMtpa) is targeted for startup in the early 2030s. A specific investment figure for the expansion has not been disclosed.
The US Gulf Coast is emerging as the world’s largest LNG export hub on the back of expanding shale gas production, and this expansion plan is an example of the continued growth of US LNG export capacity.
Announcing a large-scale expansion at the construction stage of a project that has already reached FID reflects developers’ confidence in current global LNG demand outlooks. The decision to expand even as a substantial portion of the existing volume (most of the 8.5 MMtpa) is already secured under long-term sales agreements suggests a strategy of proactively expanding capacity based on confidence that market demand will support it. If this trend of US LNG projects announcing successive expansions continues, global LNG supply could grow faster than expected over the next few years, affecting the market’s supply-demand balance. The participation of sovereign wealth fund and pension fund-type investors such as Mubadala Energy and CPPIB as strategic investors shows that large LNG projects are increasingly recognized as attractive infrastructure investments for institutional investors seeking stable long-term cash flows. If this expansion is realized, it is expected to create additional order opportunities in related EPC and equipment supply chains, including liquefaction modules and turbo-compressors.
The timing of a separate FID for this expansion, the specific investment figure, and the outcome of EPC contractor selection are the first points to confirm. How the progress of securing long-term sales agreements for the 7.75 MMtpa expansion volume unfolds is also worth watching. In addition, whether other US LNG projects will continue to announce similar expansions, and how this expanding supply affects global LNG prices and the procurement strategies of importers in Asia and Europe, also bear watching over the longer term.