Edgar Filing: GLENCORE HOLDING AG

Ownership Submission

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 ^*

Glencore AG

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)

(Last)

(First)

(Middle)

BAARERMATTSTRASSE 3, PO BOX 666

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2010

(Street)

BAAR, V8 CH-6341

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
Common Stock	05/12/2010		C		2,000	A	$ 11.59 ⁽¹⁾	36,205,317	D ⁽²⁾

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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

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Option

$ 11.59

05/12/2010

2,000

⁽¹⁾

06/05/2010

Common Stock

2,000

⁽¹⁾

19,000 ⁽³⁾

By nominee ⁽³⁾

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Glencore AG BAARERMATTSTRASSE 3 PO BOX 666 BAAR, V8 CH-6341		X
GLENCORE INTERNATIONAL AG BAARERMATTSTRASSE 3 P O BOX 666 BAAR, V8 CH-6341		X
GLENCORE HOLDING AG BAARERMATTSTRASSE 3 PO BOX 666 BAAR, V8 CH-6341		X

Signatures

GLENCORE AG - /s/ Barbara Bodmer, Officer and /s/ Stefan Peter, Officer		05/14/2010
^**Signature of Reporting Person		Date
GLENCORE INTERNATIONAL AG - /s/ Richard Marshall, Officer and /s/ Steven Blumgart, Officer		05/14/2010
^**Signature of Reporting Person		Date
GLENCORE HOLDING AG - /s/ Willy R. Strothotte, Director and /s/ Andreas Hubmann, Officer		05/14/2010
^**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)	The shares of common stock reported in Table I represents shares of common stock acquired upon exercise of 2,000 stock options by Mr. Willy R. Strothotte, who held the options as nominee for Glencore AG. As a result of the exercise of the options, the acquired shares are now held directly by Glencore AG. The options were granted on June 5, 2000 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 controlling shareholder, Glencore Holding AG.
(3)	Represents options granted to Mr. Willy R. Strothotte, a director of the issuer, between June 28, 2001 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.

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