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Three Unit­ed States leg­is­la­tors have writ­ten to the oil and gas gi­ant, Exxon­Mo­bil, on how its pay­ments to the Guyana gov­ern­ment re­gard­ing the 2016 Stabroek Block Pe­tro­le­um Agree­ment (PA), have af­fect­ed its US fed­er­al tax li­a­bil­i­ty.

“Does the 2016 PA be­tween Exxon­Mo­bil and Guyana make a dis­tinc­tion be­tween tax­es owed to the Gov­ern­ment of Guyana and pay­ments for eco­nom­ic ben­e­fits? If so, please pro­vide the spe­cif­ic lan­guage and Exxon­Mo­bil’s in­ter­pre­ta­tion of how it af­fects your U.S. fed­er­al tax li­a­bil­i­ty un­der cur­rent rules,” the three De­mo­c­ra­t­ic leg­is­la­tors wrote in their Sep­tem­ber 23, 2025 let­ter to Exxon­Mo­bil’s chair­man and chief ex­ec­u­tive of­fi­cer, Dar­ren Woods.

In their lengthy cor­re­spon­dence, Shel­don White­house of Rhode Is­land, Chris Van Hollen of Mary­land and Jeff Merkley, of Ore­gon, said that af­ter Exxon­Mo­bil dis­cov­ered near­ly 11 bil­lion bar­rels of oil off the coast Guyana, the com­pa­ny signed a PA with the Guyana gov­ern­ment.