SHAREHOLDER ALERT: Rigrodsky & Long, P.A. Announces Investigation of QEP Resources, Inc. Merger

announces that it is investigating QEP Resources, Inc. (QEP) (NYSE: QEP ) regarding possible breaches of fiduciary duties and other violations of law related to QEPs agreement to be acquired by Diamondback Energy, Inc. (Diamondback) (NASDAQ GS: FANG ).