UNDERWRITING AGREEMENT TESORO CORPORATION $450,000,000 4.250% Senior Notes due 2017 $475,000,000 5.375% Senior Notes due 2022Underwriting Agreement • September 19th, 2012 • Tesoro Corp /New/ • Petroleum refining • New York
Tesoro Corporation, a Delaware corporation (the “Company”), proposes to sell to you (the “Underwriters”), for whom RBS Securities Inc. is acting as representative (the “Representative”), $450,000,000 in aggregate principal amount of its 4.250% Senior Notes due 2017 (the “2017 Notes”) and $475,000,000 in aggregate principal amount of its 5.375% Senior Notes due 2022 (the “2022 Notes” and together with the 2017 Notes, the “Notes”). The Underwriters, acting severally and not jointly, propose to purchase the principal amount of Notes set forth opposite their respective names in Schedule I hereto. The Notes will (i) have terms and provisions which are summarized in the Disclosure Package as of the Applicable Time and the Prospectus dated the date hereof (each as defined below) and (ii) be issued pursuant to an indenture (the “Indenture”), to be dated as of September 27, 2012, among the Company, U.S. Bank National Association, as trustee (the “Trustee”), and certain Subsidiaries (as defined
