X0306 4 2017-11-30 0 0001037676 ARCH COAL INC ARCH 0001046085 KRIEGSHAUSER PATRICK A ONE CITYPLACE DRIVE, SUITE 300 ST. LOUIS MO 63141 1 0 0 0 Restricted Stock Units 2017-11-30 4 A 0 1600 0.00 A Class A Common Stock 1600 1600 D Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock of Arch Coal, Inc. The restricted stock units vest on the first anniversary of the grant date. Vested shares are scheduled to be delivered to the reporting person on the earlier of the third month anniversary of the date of the reporting person's separation of service from the Board or the date of the occurrence of a Change of Control. /s/ Rosemary L. Klein, Attorney-in-Fact 2017-12-04