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 20, 2013

NuStar Energy L.P.

(Exact name of registrant as specified in its charter)

19003 IH-10 West
San Antonio, Texas 78257
(Address of principal executive offices)

(210) 918-2000
(Registrant’s telephone number, including area code)

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:

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 5.02.                Departure of Directors of Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 20, 2013, NuStar Energy L.P. (the “Partnership”) announced that Steve Blank, the Executive Vice President and Chief Financial Officer of NuStar GP, LLC (“NuStar GP”), the general partner of Riverwalk Logistics, L.P., the general partner of the Partnership, plans to retire from such positions effective December 31, 2013. The board of directors of NuStar GP has appointed Tom Shoaf, the current Senior Vice President and Controller of NuStar GP to assume the position of Executive Vice President and Chief Financial Officer of NuStar GP effective December 31, 2013. The board of directors has appointed Jorge Del Alamo, the current Assistant Controller of NuStar GP to succeed Mr. Shoaf as Vice President and Controller.

Mr. Blank also plans to retire, effective December 31, 2013, as the Executive Vice President and Chief Financial Officer of NuStar GP Holdings, LLC (“NuStar GP Holdings”), a publicly traded Delaware limited liability company and the 100% owner of NuStar GP. The board of directors of NuStar GP Holdings has appointed Mr. Shoaf, the current Senior Vice President and Controller of NuStar GP Holdings, to assume the position of Executive Vice President and Chief Financial Officer effective December 31, 2013.

Mr. Blank has no employment agreement with the Partnership. Pursuant to a Separation and General Release Agreement, dated effective December 20, 2013, Mr. Blank will receive payment of an aggregate amount of $648,144. Other than this payment, the treatment of his compensation upon retirement will be consistent with the programs as described on pages 123-151 of the Partnership’s Form 10-K for the year ended December 31, 2012. Since the officers of NuStar GP Holdings are also officers of NuStar GP, NuStar GP Holdings’ wholly owned subsidiary and the general partner of Riverwalk Logistics, L.P., the general partner of the Partnership, there are no employment, severance or other agreements between NuStar GP Holdings and Mr. Blank.

Mr. Shoaf, age 55, became Senior Vice President and Controller of NuStar GP and NuStar GP Holdings in February 2012. He served as Vice President and Controller of NuStar GP from July 2005 until his promotion in February 2012. He also served as Vice President and Controller of NuStar GP Holdings from March 2006 until his promotion in February 2012. Mr. Shoaf served as Vice President-Structured Finance for Valero Corporate Services Company, a subsidiary of Valero Energy, from 2001 until his appointment with NuStar GP.

There are no understandings or arrangements between Mr. Shoaf and any other person pursuant to which Mr. Shoaf was selected to serve as Executive Vice President and Chief Financial Officer of NuStar GP or NuStar GP Holdings, other than the employment relationship described above. Mr. Shoaf has no employment or severance agreement with NuStar GP. There are no employment, severance or other agreements between NuStar GP Holdings and Mr. Shoaf and there is no familial relationship that would require disclosure under Item 401(d) of Regulation S-K.

Item 7.01                   Regulation FD Disclosure.

On December 20, 2013, the Partnership issued a press release announcing the events described above, which is attached hereto as Exhibit 99.1 and incorporated herein by reference. In accordance with General Instruction B.2 of Form 8-K, the information set forth in this Item 7.01 is deemed to be furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

Item 9.01                   Financial Statements and Exhibits.

(d)                     Exhibits.

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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.

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EXHIBIT INDEX

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Exhibit 99.1

NuStar CFO Steve Blank to Retire at Year-End; Tom Shoaf Selected as Successor

Jorge Del Alamo Named Controller

Amy Perry & Karen Thompson Promoted to General Counsel

December 20, 2013 03:24 PM Eastern Standard Time

SAN ANTONIO—(BUSINESS WIRE)—NuStar Energy L.P. (NYSE: NS) announced today that Steve Blank, Executive Vice President and CFO of NuStar Energy L.P. and NuStar GP Holdings, plans to retire from the company effective December 31, 2013. The company’s board of directors has selected Tom Shoaf, NuStar’s Controller, to serve as Executive Vice President and Chief Financial Officer upon Blank’s retirement, and Jorge Del Alamo, NuStar’s Assistant Controller, has been promoted to Vice President and Controller.

The company also announced that Amy Perry and Karen Thompson, both of whom serve as Vice President and Assistant General Counsel at NuStar, will succeed Brad Barron, Executive Vice President and General Counsel, when he becomes President and CEO on January 1, 2014. Perry is being promoted to Senior Vice President, Corporate Secretary and General Counsel — Corporate & Commercial Law, and Thompson is being promoted to Senior Vice President and General Counsel — Litigation, Regulatory & Environmental.

Blank to Retire & Shoaf to Succeed Him as CFO

“Throughout his long career with the company, Steve has made countless contributions to our success and has built a top-notch Accounting/Finance organization from the ground up,” said Curt Anastasio, NuStar’s President and CEO. “His fiscal responsibility, strong principles and personal integrity have contributed to NuStar’s reputation as one of the most trustworthy companies in corporate America. Also since our inception, Steve’s extensive knowledge of the financial industry has been an important component of our strategic planning effort.”

Barron praised Blank for contributing to NuStar’s growth and building one of the best finance departments in the industry. “Steve contributed to NuStar’s tremendous growth over the years as he was a key player in every major transaction from the time of the formation of our company through today. Thanks to Steve, we’re fortunate to have an outstanding Finance Department with a great group of employees and many strong leaders who have numerous years of experience, a thorough understanding of our business, and a commitment to NuStar’s guiding principles.

“When we contemplated a successor for Steve, we knew that we wanted someone who could work collaboratively with the other executives in Finance, as well as in other departments at the corporate office and in our field operations. And without a doubt, Tom has the leadership skills, experience and personality to do just that. We have no doubt that he will do a great job of leading this organization as he has nearly 30 years of experience in his field, solid leadership skills, the highest ethical standards, a strong work ethic and great interpersonal skills,” said Barron.

Prior to becoming NuStar’s Controller eight years ago, Shoaf served in positions of increasing responsibility with Valero Energy Corporation, eventually becoming Director of Finance. Shoaf started his career as an Accountant with City Public Service, San Antonio’s energy utility company, after graduating with a bachelor of business administration degree in accounting from Abilene Christian University. In recognition of his experience and achievements over the years, Shoaf was named the Top Controller by the San Antonio Business Journal in 2012.

Del Alamo Selected as Controller

“Tom has chosen an outstanding accounting executive and strong leader to succeed him,” said Barron. “Jorge has done a great job in his current position, as he has the unique ability to focus on the details without losing sight of the big picture. He has helped ensure that our financial statements reflect the most accurate and up-to-date disclosure, our budgets and forecasts are as precise as possible, and our capital expenses are properly planned and allocated.”

Del Alamo joined Valero in 2003 as Director of Sarbanes Oxley, and subsequently moved over to NuStar as Director of Financial Reporting. Prior to that, he served as the Controller of Fuego, Inc., as CFO and Controller of Life Systems, Inc., and as a Sr. Manager of Ernst & Young LLP.

Perry & Thompson Appointed General Counsel

“Our Legal Department has a very strong leadership team and an outstanding group of professionals who are incredibly smart, hard-working, dedicated and accomplished,” said Barron. “And Amy Perry and Karen Thompson have done an outstanding job of handling many complex legal issues, ranging from overseeing complicated acquisitions to successfully resolving challenging legal disputes. So I am looking forward to expanding their roles within the company and having their involvement on the senior leadership team.”

Since joining the company nearly 11 years ago, Perry has overseen its corporate finance and commercial transactions, corporate governance, external legal reporting, and employee benefits issues. Prior to NuStar, she served as Counsel — Corporate Law for Valero, and prior to that she practiced corporate, mergers & acquisitions and securities law at DLA Piper in New York City and Wilson Sonsini Goodrich & Rosati in Austin. In her new role, she will continue to be responsible for the same areas within the company’s Legal Department and will continue to serve as Corporate Secretary, but she also will oversee the Ad Valorem Tax and Right-of-Way departments.

Thompson joined the company approximately 12 years ago, and since that time she has resolved many complex issues, providing legal advice and support regarding litigation, disputes, environmental and regulatory matters. Prior to joining the company, she served as Managing Counsel for Valero and practiced law at Mayor, Day, Caldwell &

Keeton in Houston. Thompson will continue to be responsible for all litigation and regulatory issues, plus she will now oversee Risk Management, Health, Safety & Environmental, and Customs & Trade.

About NuStar Energy L.P.

NuStar Energy L.P., a publicly traded master limited partnership based in San Antonio, is one of the largest independent liquids terminal and pipeline operators in the nation. NuStar currently has 8,643 miles of pipeline; 87 terminal and storage facilities that store and distribute crude oil, refined products and specialty liquids; and 50% ownership in a joint venture that owns a terminal and an asphalt refinery with a throughput capacity of 74,000 barrels per day. The partnership’s combined system has approximately 97 million barrels of storage capacity, and NuStar has operations in the United States, Canada, Mexico, the Netherlands, including St. Eustatius in the Caribbean, the United Kingdom and Turkey. For more information, visit NuStar Energy L.P.’s Web site at www.nustarenergy.com.

Contacts

NuStar Energy L.P.

Media:

Mary Rose Brown, 210-918-2314

maryrose.brown@nustarenergy.com

or

Investors:

Chris Russell, 210-918-3507

chris.russell@nustarenergy.com