Sunoco to Buy NuStar Energy in All-Stock Deal of $7.3 Billion / Energy Topics & Technology, Latest, Mergers and Acquisitions, US News / By mark Reuters Jan 22 (Reuters) – Sunoco (SUN.N) said on Monday it would acquire NuStar Energy (NS.N) in an all-equity transaction valued at about $7.3 billion, including assumed debt. Share this:FacebookX Related