X0303 4/A 2009-11-19 2009-11-23 0001441849 CLOUD PEAK ENERGY INC. CLD 0001191413 TONG CHRIS 505 S. GILLETTE AVE. GILLETTE WY 82716 1 Common Stock 2009-11-19 4 P 0 1500 15.00 A 1500 D Purchased pursuant to Cloud Peak Energy's directed share program as part of the initial public offering. These shares were inadvertantly omitted from the reporting person's Form 4 required to be filed on November 23, 2009. /s/ Amy J. Stefonick, attorney-in-fact for Chris Tong 2009-12-01