Ecopetrol S.A. (Ecopetrol) is an oil company operating in Colombia and overseas. The Company operates in four business segments: exploration and production; transportation; refining; and marketing and supply. Exports of crude oil and refined-products accounted for approximately 33% of Colombia’s total exports during the year ended December 31, 2008, of which the Company’s exports accounted for 48%. In February 2009, Ecopetrol and Korea National Oil Corporation (KNOC) acquired Offshore International Group Inc. In February 2009, Ecopetrol and KNOC jointly acquired PetroTech Peruana SA. In May 2009, Ecopetrol completed the acquisition of all shares held by Glencore in Reficar S.A. In June 2009, the Company established Ecopetrol Global Energy S.L. Ecopetrol transferred all of its stake in Ecopetrol America Inc (Ecopetrol's affiliate in the United States) to its investment affiliate Ecopetrol Global Energy S.L.