SEC Form 3

FORM 3

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

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1. Name and Address of Reporting Person* Kjos David (Last) (First) (Middle) CENTURY ALUMINUM COMPANY 2511 GARDEN ROAD, BLDG A, SUITE 200 (Street) MONTEREY CA 93940 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 10/03/2011	3. Issuer Name and Ticker or Trading Symbol CENTURY ALUMINUM CO [ CENX ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) VP Maj. Proj., Tech. & Sustain	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	130,310	D
Common Stock	2,650(1)	D
Common Stock	3,801(2)	D
Common Stock	7,000(3)	D
Common Stock	868.7973(4)	I	401(k)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(5)	07/31/2017	Common Stock	5,000	$53.45	D
Stock Option (Right to Buy)	(5)	05/04/2019	Common Stock	16,099	$6.55	D

Explanation of Responses:

1. Represents unvested shares of common stock acquired by the Reporting Person pursuant to the Issuer's 2010-2012 Performance Share Program (the "2010-2012 Performance Period") under a Rule 16b-3(d) plan, all of which vest in the ordinary course on the last day of the 2010-2012 Performance Period, December 31, 2012.

2. Represents unvested shares of common stock acquired by the Reporting Person pursuant to the Issuer's 2011-2013 Performance Share Program (the "2011-2013 Performance Period") under a Rule 16b-3(d) plan, all of which vest in the ordinary course on the last day of the 2011-2013 Performance Period, December 31, 2013.

3. Represents shares of common stock acquired by the Reporting Person under a Rule 16b-3(d) plan. These shares vested on June 7, 2011. Though vested, these shares will not settle until the earlier of (i) March 22,2013 (with respect to 3,500 shares) or March 22, 2014 (with respect to the remaining 3,500 shares) or (ii) the occurrence of certain subsequent events.

4. As reported by the 401(k) plan trustee on October 3, 2011.

5. Currently exercisable.

Remarks:

	William J. Leatherberry, Attorney-in-Fact for David Kjos	10/05/2011
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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