Complex sentence: Avangrid (formerly Energy East, and Iberdrola USA), a subsidiary of Spanish energy company Iberdrola, S.A., is an energy services and delivery company serving about 2.7 million customers throughout upstate New York and New England, in the United States.
Split into simpler sentences: Avangrid (formerly Energy East, and Iberdrola USA), is an energy services and delivery company. A subsidiary of Spanish energy company Iberdrola, S.A., Avangrid serves about 2.7 million customers throughout upstate New York and New England in the United States.