X0306 4 2018-05-01 0 0001692819 Vistra Energy Corp. VST 0001704101 Hunter Jeff D 6555 SIERRA DRIVE IRVING TX 75039 1 0 0 0 Common Stock 2018-05-01 4 A 0 6564 0.00 A 28998 D Grants of restricted stock units approved by Issuer's Board of Directors on May 1, 2018. The restricted stock units were issued in connection with the Reporting Person's director compensation, and the number of units issued was calculated based on the closing stock price of the Issuer's common stock of $22.85 on April 30, 2018. Each restricted stock unit represents a contingent right to receive one share of Vistra Energy Corp. common stock. The restricted stock units vest in full on May 1, 2019. /s/ Jeff D. Hunter 2018-05-03