Rio Tinto PLC — Director's Dealing 2009

Nov 20, 2009

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CLOUD PEAK ENERGY INC. (CLD)
CIK: 0001441849
Period of Report: 2009-11-19

Reporting Person: RIO TINTO PLC (Director, 10% Owner)
Reporting Person: RIO TINTO EUROPEAN HOLDINGS LTD (Director, 10% Owner)
Reporting Person: RIO TINTO WESTERN HOLDINGS LTD (Director, 10% Owner)
Reporting Person: RIO TINTO AMERICA HOLDINGS INC (Director, 10% Owner)
Reporting Person: RTAH LLC (Director, 10% Owner)
Reporting Person: RIO TINTO AMERICA INC (Director, 10% Owner)
Reporting Person: RIO TINTO ENERGY AMERICA INC (Director, 10% Owner)
Reporting Person: KENNECOTT MANAGEMENT SERVICES CO (Director, 10% Owner)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2009-11-19	Common Membership Units	$0	D	30600000	Disposed		Common Stock of Cloud Peak Energy Inc., par value $.01/share (30600000)	Indirect

Footnotes

F1: For text of Footnote 1, see Exhibit 99.1.

F2: For text of Footnote 2, see Exhibit 99.1.

F3: For text of Footnote 3, see Exhibit 99.1.