SEC FORM 4

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

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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^*

Kjos David

(Last)

(First)

(Middle)

CENTURY ALUMINUM COMPANY

2511 GARDEN ROAD, BLDG A, SUITE 200

(Street)

MONTEREY

93940

(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	10% Owner
X	Officer (give title below)	Other (specify below)
	VP Maj Proj. Tech. & Sustain

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2013

4. 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 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	03/19/2013		A		5,523⁽¹⁾	A	⁽¹⁾	148,311⁽²⁾	D
Common Stock	03/19/2013		A		6,412⁽³⁾	A	⁽³⁾	154,723⁽⁴⁾	D
Common Stock								868.7973⁽⁵⁾	I	By 401(k) plan

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Represents shares of common stock acquired by the Reporting Person upon the vesting of performance share units granted pursuant to the Issuer's 2012-2014 Performance Share Program ("2012-2014 Plan Period ") under a Rule 16b-3(d) plan, all of which vest in the ordinary course on the last day of the 2012-2014 Plan Period, December 31, 2014.

2. Includes vested performance share units granted to the Reporting Person pursuant to the Issuer's 2011-2013 and 2011-2014 Performance Share Programs, 3,801 of which will settle on December 31, 2013, and 3,500 of which will settle on each of March 22, 2013 and March 22, 2014, respectively; and unvested performance share units granted to the Reporting Person pursuant to the Issuer's 2012-2014 Performance Share Program, all of which will vest on December 31, 2014, all under a Rule 16b-3(d) plan.

3. Represents shares of common stock acquired by the Reporting Person upon the vesting of performance share units granted pursuant to the Issuer's 2013-2015 Performance Share Program ("Plan Period ") under a Rule 16b-3(d) plan, all of which vest in the ordinary course on the last day of the Plan Period, December 31, 2015.

4. Includes vested performance share units granted to the Reporting Person pursuant to the Issuer's 2011-2013 and 2011-2014 Performance Share Programs, 3,801 of which will settle on December 31, 2013, and 3,500 of which will settle on each of March 22, 2013 and March 22, 2014, respectively; and unvested performance share units granted to the Reporting Person pursuant to the Issuer's 2012-2014 and 2013-2015 Performance Share Programs, all of which will vest on December 31, 2014 and December 31, 2015, respectively, all under a Rule 16b-3(d) plan.

5. As reported by 401(k) plan trustee on March 19, 2013.

	Michael A. Serafini, Attorney-in-Fact for David Kjos	03/21/2013
	** 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 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).
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