SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Glencore AG (Last) (First) (Middle) BAARERMATTSTRASSE 3 P.O. BOX 666 (Street) BAAR V8 CH-6341 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol CENTURY ALUMINUM CO [ CENX ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 06/25/2013
	4. If Amendment, Date of 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

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
Common Stock	06/25/2013		C		3,000(1)	A	$7.34	36,997,559	D(2)

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 Securities Underlying Derivative Security (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: 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
Stock Option	$7.34	06/25/2013		C			3,000	(1)	06/25/2013	Common Stock	3,000	(1)	12,000(3)	I	By nominee(3)

1. Name and Address of Reporting Person* Glencore AG (Last) (First) (Middle) BAARERMATTSTRASSE 3 P.O. BOX 666 (Street) BAAR V8 CH-6341 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* GLENCORE INTERNATIONAL AG (Last) (First) (Middle) BAARERMATTSTRASSE 3 P O BOX 555 CH 6341 BAAR (Street) SWITZERLAND (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Glencore Xstrata plc (Last) (First) (Middle) BAARERMATTSTRASSE 3 P.O. BOX 777 (Street) BAAR V8 CH-6341 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The shares of common stock reported in Table I represents shares of common stock acquired upon exercise of an option to acquire 3,000 shares of common stock by Mr. Willy R. Strothotte, who held the option as nominee for Glencore AG. As a result of the exercise of the option, the acquired shares are now held directly by Glencore AG. The option was granted on June 25, 2003 and vested and became exercisable in four equal installments on each of (i) the date three months following the date of grant, (ii) the date six months following the date of grant, (iii) the date nine months following the date of grant and (iv) the first anniversary of the date of grant.

2. The shares of common stock reported in Table I are held directly, and the stock options reported in Table II are held indirectly, by Glencore AG a direct wholly-owned subsidiary of Glencore International AG, and indirectly by Glencore International AG and its parent, Glencore Xstrata plc.

3. Represents options granted to Mr. Willy R. Strothotte, a former director of the issuer, between July 19, 2004 and May 24, 2007, which Mr. Strothotte holds as nominee for Glencore AG. Options vest and become exercisable in four equal installments on each of (i) the date three months following the date of grant, (ii) the date six months following the date of grant, (iii) the date nine months following the date of grant and (iv) the first anniversary of the date of grant. The options will expire and cease to be exercisable on the respective tenth anniversaries of the date of grant.

	/s/ Steven Kalmin, Director, GLENCORE AG	06/28/2013
	/s/ Andreas Hubmann, Director, GLENCORE AG	06/28/2013
	/s/ Martin Haering, Officer, GLENCORE INTERNATIONAL AG	06/28/2013
	/s/ Andrew Caplan, Officer, GLENCORE INTERNATIONAL AG	06/28/2013
	/s/ Ivan Glasenberg, Director, GLENCORE XSTRATA PLC	06/28/2013
	** Signature of Reporting Person	Date
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