8-K

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): December 14, 2006

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))

TABLE OF CONTENTS

	Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.
	Item 9.01 Financial Statements and Exhibits.
SIGNATURES
Index to Exhibits
Press Release

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

On December 18, 2006 Tesoro Corporation (the “Company”) issued a press release (the “Press Release”) announcing that the Company’s Board of Directors had elected Arlen Glenewinkel, Jr. as Vice President and Controller effective as of December 14, 2006. Mr. Glenewinkel will assume the role of Principal Accounting Officer. Prior to the election Mr. Glenewinkel had served as Vice President, Enterprise Risk beginning in April 2005, Vice President, Internal Audit from August 2002 to April 2005 and Director, Business Processes from July 2001 to August 2002. 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 December 18, 2006 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: December 18, 2006

TESORO CORPORATION
By:	/s/ Bruce A. Smith
	Bruce A. Smith
	Chairman of the Board of Directors, President and Chief Executive Officer

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Index to Exhibits

Exhibit Number	Description
99.1	Press Release issued on December 18, 2006 by Tesoro Corporation.

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EX-99.1

Exhibit 99.1

     NEWS RELEASE

For More Information:
Natalie Silva
Corporate Communications
210-283-2729
nsilva@tsocorp.com

Scott Phipps
Investor Relations
210-283-2882
sphipps@tsocorp.com

Tesoro Names Arlen Glenewinkel Jr. Vice President and Controller

San Antonio, Texas — December 18, 2006 — Tesoro Corporation (NYSE: TSO) announced today that the board of directors has elected Arlen Glenewinkel Jr. Vice President and Controller. Prior to his new position, Glenewinkel was Vice President, Enterprise Risk. The new appointment is effective immediately.

     “We continue to focus on employee development with the goal of improving the overall strength and scope of our management team. For the past 26 years, Arlen has done an outstanding job for the company and has made significant improvements to the company’s controls and audit processes. We see this as another step in Arlen’s career experience with Tesoro,” said Greg Wright, Tesoro Executive Vice President and Chief Financial Officer.

     Glenewinkel joined Tesoro in 1980 as an associate accountant and has since filled many roles in the controller and CFO organizations. He served as Vice President of Internal Audit before being named Vice President, Enterprise Risk in 2005. Glenewinkel holds a bachelor’s degree in accounting from the University of Texas at San Antonio and is a Certified Public Accountant.

About Tesoro
Tesoro Corporation, a Fortune 200 and a Global Fortune 500 company headquartered in San Antonio, Texas, is an independent refiner and marketer of petroleum products. Tesoro operates six refineries in the western United States with a combined crude oil capacity of more than 560,000 barrels per day. Tesoro’s retail marketing system includes over 450 branded retail stations, of which approximately 200 are company operated under the Tesoro^® and Mirastar^® brands. Tesoro’s commercial marketing system includes sales of jet fuel and marine fuels.

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