Avangrid (AGR) 8-K Avangrid Reports First Quarter 2017 Earnings Results and Affirms 2017 Earnings Outlook

Exhibit 99.3

NEWS RELEASE

April 20, 2017 Contact: Patricia Cosgel (203) 499-2624

Avangrid Declares Quarterly Dividend

New Haven, CT – April 20, 2017 (NYSE: AGR) – Today Avangrid, Inc. announced that its Board of Directors declared a quarterly dividend of $0.432 per share on its shares of common stock. This dividend is payable July 3, 2017 to shareholders of record at the close of business on June 9, 2017.

Avangrid, Inc. (NYSE: AGR) is a diversified energy and utility company with more than $31 billion in assets and operations in 27 states. The company owns regulated utilities and electricity generation assets through two primary lines of business, Avangrid Networks and Avangrid Renewables. Avangrid Networks is comprised of eight electric and natural gas utilities, serving approximately 3.2 million customers in New York and New England. Avangrid Renewables operates 6.5 gigawatts of electricity capacity, primarily through wind power, in states across the United States. Avangrid employs approximately 6,800 people. Iberdrola S.A. (Madrid: IBE), a worldwide leader in the energy industry, owns 81.5% of the outstanding shares of Avangrid common stock. For more information, visitwww.avangrid.com.