X0206 3 2017-06-16 0 0001441849 CLOUD PEAK ENERGY INC. CLD 0001708318 Clemetson Amy 505 SOUTH GILLETTE AVENUE GILLETTE WY 82715 0 1 0 0 Senior VP, Human Resources Common Stock 3808 D Restricted Stock Units Common Stock 11795 D This total does not include restricted stock units ("RSUs") (see footnote 2 below) or performance share units ("PSUs") granted to the Reporting Person in 2015, 2016 or 2017 and that will be reported under Section 16 upon any vesting, as provided by applicable rules. PSUs represent a contingent right to receive the value of one share of Cloud Peak Energy Inc. ("CPE") common stock. In general, PSUs vest 3 years from the date of grant depending on CPE's achievement of performance goals, which are based upon CPE's relative and absolute total shareholder return ("TSR"), and subject to the terms of the award agreement and CPE's long-term incentive plan ("LTIP"). These TSR achievements may result in a payout ranging between 0% and 200% of the target. Represents the following awards of RSUs granted to the Reporting Person: 1,669 RSUs granted on 3/2/15, 7,055 RSUs granted on 3/4/16 and 3,071 RSUs granted on 3/3/17. Each RSU represents a contingent right to receive the value of one share of CPE common stock. In general, 100% of the RSUs vest three years after the date of grant subject to the terms of the award agreement and CPE's LTIP. Vested RSUs may be paid in shares, cash or a combination of shares and cash, in the discretion of the Compensation Committee. Exhibit List: 1. Exhibit 24 - Power of Attorney /s/ Bryan J. Pechersky, attorney-in-fact for Amy Clemetson 2017-06-19