Simpson Thacher represented YPF Energía Eléctrica S.A. (YPF Luz) in connection with its offering of US$420 million aggregate principal amount of 7.875% Senior Notes due 2032, in reliance on Rule 144A and Regulation S.~~YPF Luz is engaged in the development and generation of electrical power from both conventional and renewable sources in Argentina. YPF Luz is 72.7% owned by YPF S.A., Argentina’s largest energy company, and 24.9% owned by GE EFS Power Investments B.V.~~The Simpson Thacher team included Juan Francisco Méndez, Juan Naveira, Jon Vicuña and Matias Allende (Capital Markets), and Jon Cantor and Sean Largey (Tax).