Mobil Oil Guam Inc. (ExxonMobil) is a subsidiary of Exxon Mobil Corporation - the world's largest publicly traded international oil and gas company. They have been a member of the Guam business community since 1950.

They are a major supplier of petroleum products, with a large customer service base in these areas selling to over 100 retail, aviation, marine, hotel construction, transportation, power-generation and other government customers. Mobil also supplies to the wider region of Pacific Islands including Federated States of Micronesia and Palau via distributors.

ExxonMobil is committed to investing in the communities in which they operate, and in Guam Sub-Cluster, the company gives annual contributions and sponsorships to the American Cancer Society; American Red Cross; Guam Chamber of Commerce; and public and private schools (in support of a reading, math and science program in the Marianas). They also support numerous outreach, safety and environmental, and community programs.