UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 29, 2007

Tesoro Corporation

(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction
of incorporation) 1-3473
(Commission File Number) 95-0862768
(IRS Employer Identification No.)

300 Concord Plaza Drive
San Antonio, Texas
(Address of principal executive offices) 78216-6999
(Zip Code)

(210) 828-8484
(Registrant’s telephone number,
including area code)

Not Applicable
(Former name or former address, if
changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2.):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events.

On May 29, 2007, Tesoro Corporation (“Tesoro”) issued a press release (the “Press Release”) announcing the closing of its offering of $500 million in aggregate principal amount of its 6¹/2% Senior Notes due 2017 issued pursuant to a private placement and expected to be resold by the initial purchasers under Rule 144A and Regulation S under the Securities Act of 1933. Tesoro used the net proceeds from the Notes offering, together with cash on hand, to repay borrowings under Tesoro’s $700 million 364-day term loan. The 364-day term loan was used to finance, in part, the acquisition of certain assets from Shell Oil Products US. The 364-day term loan was terminated upon repayment. The Press Release is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

     (c) Exhibits.

99.1 Press Release issued on May 29, 2007 by Tesoro Corporation.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: May 29, 2007

TESORO CORPORATION
By:	/s/ GREGORY A. WRIGHT
	Gregory A. Wright
	Executive Vice President and Chief Financial Officer

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Index to Exhibits

Exhibit Number	Description
99.1	Press Release issued on May 29, 2007 by Tesoro Corporation.

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