One Rock Capital Partners, a private equity firm with offices in New York and Los Angeles, completed the acquisition of the tire additives business of Eastman Chemical, a global specialty materials company, for $786m. "The business serves an impressive group of global blue-chip customers as a result of its unique technical and commercial service expertise. During the next stage of growth, we look forward to working closely with management to enhance the portfolio of product and service offerings," R. Scott Spielvogel, One Rock Managing Partner.