NuStar Energy L.P. Declares Series A Preferred Unit, Series B Preferred Unit and Common Unit Third Quarter 2017 Distributions

SAN ANTONIO–(BUSINESS WIRE)–NuStar Energy L.P. (NYSE: NS) today announced that its Board of
Directors has declared a third quarter 2017 Series A preferred unit
distribution of $0.53125 per unit and a Series B preferred unit
distribution of $0.47657 per unit. The preferred unit distributions will
be paid on December 15, 2017 to holders of record as of December 1, 2017.

NuStar Energy L.P.’s Board of Directors also declared a third quarter
2017 common unit distribution of $1.095 per unit. The third quarter
common unit distribution will be paid on November 14, 2017 to holders of
record as of November 9, 2017.

A conference call with management is scheduled for 9:00 a.m. CT on
Tuesday, November 7, 2017, to discuss the financial and operational
results for the third quarter of 2017. Investors interested in listening
to the discussion may dial toll-free 844/889-7787, passcode 93805813.
International callers may access the discussion by dialing 661/378-9931,
passcode 93805813. The partnership intends to have a playback available
following the discussion, which may be accessed by dialing toll-free
855/859-2056, passcode 93805813. International callers may access the
playback by dialing 404/537-3406, passcode 93805813. The playback will
be available until 12:00 p.m. CT on December 7, 2017.

Investors interested in listening to the live discussion or a replay via
the internet may access the discussion directly at https://edge.media-server.com/m6/p/ounvkpgz
or by logging on to NuStar Energy L.P.’s website at www.nustarenergy.com.

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 approximately
9,300 miles of pipeline and 81 terminal and storage facilities that
store and distribute crude oil, refined products and specialty liquids.
The partnership’s combined system has approximately 96 million barrels
of storage capacity, and NuStar has operations in the United States,
Canada, Mexico, the Netherlands, including St. Eustatius in the
Caribbean, and the United Kingdom. For more information, visit NuStar
Energy L.P.'s website at www.nustarenergy.com.

This release serves as qualified notice to nominees under Treasury
Regulation Sections 1.1446-4(b)(4) and (d). Please note that 100% of
NuStar Energy L.P.’s distributions to foreign investors are attributable
to income that is effectively connected with a United States trade or
business. Accordingly, all of NuStar Energy L.P.’s distributions to
foreign investors are subject to federal income tax withholding at the
highest effective tax rate for individuals and corporations, as
applicable. Nominees, and not NuStar Energy L.P., are treated as the
withholding agents responsible for withholding on the distributions
received by them on behalf of foreign investors.

Contacts

NuStar Energy, L.P., San Antonio
Investors, Chris Russell,
Treasurer and Vice President Investor Relations
Investor Relations:
210-918-3507
or
Media, Mary Rose Brown, Executive Vice
President and Chief Administrative Officer,
Corporate
Communications: 210-918-2314
website: http://www.nustarenergy.com