FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * RIO TINTO PLC   2. Issuer Name and Ticker or Trading Symbol CLOUD PEAK ENERGY INC. [CLD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2 EASTBOURNE TERRACE,  3. Date of Earliest Transaction (Month/Day/Year) 11/19/2009 (Street) LONDON, X0 W2 6LG 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Common Membership Units

$ 0 (1)

11/19/2009

D

30,600,000

(1)

(1)

Common Stock of Cloud Peak Energy Inc., par value $.01/share

30,600,000

$ 14.18 (2)

29,400,000

I (3)

See footnote (3)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
RIO TINTO PLC 2 EASTBOURNE TERRACE LONDON, X0 W2 6LG	X	X
RIO TINTO EUROPEAN HOLDINGS LTD 2 EASTBOURNE TERRACE LONDON, X0 W2 6LG	X	X
RIO TINTO WESTERN HOLDINGS LTD 2 EASTBOURNE TERRACE LONDON, X0 W2 6LG	X	X
RIO TINTO AMERICA HOLDINGS INC 100 QUENTIN ROOSEVELT BOULEVARD GARDEN CITY, NY 11530	X	X
RTAH LLC P.O. BOX 3009 505 SOUTH GILLETTE AVENUE GILLETTE, WY 82717-3009	X	X
RIO TINTO AMERICA INC 3595 S 8309 W MAGNA, UT 84044	X	X
RIO TINTO ENERGY AMERICA INC 505 SOUTH GILLETTE AVENUE GILLETTE, WY 82717-3009	X	X
KENNECOTT MANAGEMENT SERVICES CO P.O. BOX 3009 505 SOUTH GILLETTE AVENUE GILLETTE, WY 82717-3009	X	X

Signatures

/s/ Jim Berson, Attorney-in-Fact, RIO TINTO PLC		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, RIO TINTO EUROPEAN HOLDINGS LIMITED		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, RIO TINTO WESTERN HOLDINGS LIMITED		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, RIO TINTO AMERICA HOLDINGS INC.		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, RTAH LLC		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, RIO TINTO AMERICA INC.		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, RIO TINTO ENERGY AMERICA INC.		11/17/2009
**Signature of Reporting Person		Date
/s/ Jim Berson, Attorney-in-Fact, KENNECOTT MANAGEMENT SERVICES COMPANY		11/17/2009
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	For text of Footnote 1, see Exhibit 99.1.
(2)	For text of Footnote 2, see Exhibit 99.1.
(3)	For text of Footnote 3, see Exhibit 99.1.
Remarks: Preston Chiaro serves on the board of directors of the Issuer and is the Group Executive, Technology & Innovation, of Rio  Tinto.  As a result, the Reporting Owners may be deemed directors of the Issuer by deputization. Exhibit List Exhibit 99.1 - Text of Footnote 1, Footnote 2 and Footnote 3.

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