Approximately 1,200 people are employed at the site.

In March 2016, the joint venture between Shell and Saudi Aramco was set on course to dissolve, and this refinery is now controlled by Saudi Aramco effective May 1, 2017.

The completion of the expansion of the Port Arthur Refinery, officially celebrated on 31 May 2012, increased its crude oil capacity to 600,000 barrels per day - making it the largest refinery in the US. The expansion added 325,000 barrels per day of capacity. As of May 2016 the refinery has reached a maximum

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