NuStar Energy L.P. (NYSE: NS) and NuStar GP Holdings, LLC (NYSE: NSH) today announced that they will host a joint conference call on Wednesday, April 25, 2012 at 9:00 a.m. Central Time to discuss the first quarter 2012 earnings results, which will be released earlier that day, and provide an update on the operations of the companies. The conference call may be accessed by dialing 800/622-7620, reservation passcode 67573485. International callers may access the conference call by dialing 706/645-0327, reservation passcode 67573485. The companies intend to have a playback available following the conference call, which may be accessed by calling 800/585-8367, reservation passcode 67573485. International callers may access the playback by calling 404/537-3406, reservation passcode 67573485.

Persons interested in listening to the presentation live via the internet may log on to NuStar Energy L.P.’s Web site at www.nustarenergy.com or NuStar GP Holdings, LLC’s Web site at www.nustargpholdings.com.

NuStar Energy L.P. is a publicly traded limited partnership based in San Antonio, with 8,420 miles of pipeline; 89 terminal and storage facilities that store and distribute crude oil, refined products and specialty liquids; and two asphalt refineries and a fuels refinery with a combined throughput capacity of 118,500 barrels per day. The partnership’s combined system has approximately 98 million barrels of storage capacity. One of the largest asphalt refiners and marketers in the U.S. and the second largest independent liquids terminal operator in the nation, 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.

NuStar GP Holdings, LLC is a publicly traded limited liability company that owns the two percent general partner interest, a 14.2 percent limited partner interest and the incentive distribution rights in NuStar Energy L.P., one of the largest asphalt refiners and marketers in the U.S. and the second largest independent liquids terminal operator in the nation with 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 GP Holdings, LLC’s Web site at www.nustargpholdings.com.