SK Holdings is one of the largest conglomerates in South Korea, and the 57th largest company in the world. Bet you didn’t know that! SK is composed of 95 subsidiary companies with 70,000 employees and has its fingers in many pies, including telecommunications, manufacturing and chemicals. One of SK’s core businesses is energy. Yesterday the company made a major investment in energy by investing in Blue Racer Midstream, a gathering and processing system with 700 miles of pipelines in Ohio and West Virginia, the heart of the Marcellus/Utica.