 WILMINGTON, Del., Dec. 21, 2020 GLOBE NEWSWIRE -- Rigrodsky Long, P.A. announces that it is investigating PNM Resources, Inc. PNM NYSE: PNM regarding possible breaches of fiduciary duties and other violations of law related to PNMs agreement to be acquired by Avangrid, Inc. Avangrid NYSE: AGR. Under the terms of the agreement, PNMs shareholders will receive 50.30 in cash per share. 