Sec Form 4 Filing - HAMPSHIRE WILLIAM J @ CENTURY ALUMINUM CO - 2004-09-01

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 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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1. Name and Address of Reporting Person HAMPSHIRE WILLIAM J 2. Issuer Name and Ticker or Trading Symbol CENTURY ALUMINUM CO [ CENX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2511 GARDEN ROAD, SUITE 200 3. Date of Earliest Transaction (MM/DD/YY) 09/01/2004 (Street) MONTEREY, CA93940 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 09/01/2004 M 3,000 A $ 7.34 10,500 D Common Stock 09/01/2004 S 899 D 9,601 D Common Stock 09/01/2004 M 1,744 A $ 15.17 11,345 D Common Stock 09/01/2004 S 1,082 D 10,263 D Common Stock 09/02/2004 M 500 A $ 11.59 10,763 D Common Stock 09/02/2004 S 238 D 10,525 D Common Stock 09/02/2004 M 2,000 A $ 15.87 12,525 D Common Stock 09/02/2004 S 1,297 D 11,228 D Common Stock 09/02/2004 M 256 A $ 15.17 11,484 D Common Stock 09/02/2004 S 159 D 11,325 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Non-Employee Director Stock Option (Right to Buy) $ 7.34 09/01/2004 M 3,000 ( 6 ) 06/25/2013 Common Stock 3,000 $ 7.34 0 D Non-Employee Director Stock Option (Right to Buy) $ 15.17 09/01/2004 M 1,744 ( 7 ) 06/25/2012 Common Stock 1,744 $ 15.17 0 D Non-Employee Director Stock Option (Right to Buy) $ 11.59 09/02/2004 M 500 ( 8 ) 06/05/2010 Common Stock 500 $ 11.59 0 D Non-Employee Director Stock Option (Right to Buy) $ 15.87 09/02/2004 M 2,000 ( 9 ) 06/28/2011 Common Stock 2,000 $ 15.87 0 D Non-Employee Director Stock Option (Right to Buy) $ 15.17 09/02/2004 M 256 ( 7 ) 06/25/2012 Common Stock 256 $ 15.17 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other HAMPSHIRE WILLIAM J 2511 GARDEN ROAD SUITE 200 MONTEREY, CA93940 X Signatures /s/ Gerald J. Kitchen, as Attorney-in-Fact 09/03/2004 Signature of Reporting Person Date

Explanation of Responses:

( 1 )These shares were sold within a range of $24.50 to $24.70 per share as follows: (i) 11 shares were sold at $24.70; (ii) 9 shares were sold at $24.65; (iii) 21 shares were sold at $24.52; (iv) 108 shares were sold at $24.51; and (v) 750 shares were sold at $24.50. ( 2 )These shares were sold within a range of $24.50 to $24.70 per share as follows: (i) 13 shares were sold at $24.70; (ii) 11 shares were sold at $24.65; (iii) 26 shares were sold at $24.52; (iv) 129 shares were sold at $24.51; and (v) 903 shares were sold at $24.50. ( 3 )These shares were sold within a range of $24.50 to $24.53 per share as follows: (i) 27 shares were sold at $24.53; (ii) 22 shares were sold at $24.51; (iii) 17 shares were sold at $24.5024; (iv) 6 shares were sold at $24.5010; and (v) 166 shares were sold at $24.50. ( 4 )These shares were sold wi thin a range of $24.50 to $24.53 per share as follows: (i) 145 shares were sold at $24.53; (ii) 119 shares were sold at $24.51; (iii) 90 shares were sold at $24.5024; (iv) 37 shares were sold at $24.5010; and (v) 906 shares were sold at $24.50. ( 5 )These shares were sold within a range of $24.50 to $24.53 per share as follows: (i) 17 shares were sold at $24.53; (ii) 15 shares were sold at $24.51; (iii) 11 shares were sold at $24.5024; (iv) 5 shares were sold at $24.5010; and (v) 111 shares were sold at $24.50. ( 6 )June 25, 2003 annual grant of Non-Employee Director Stock Options. Options 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. ( 7 )June 25, 2002 annual grant of Non-Employee Director Stock Options. Options 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. ( 8 )June 5, 2000 annual grant of Non-Employee Director Stock Options. Options 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. ( 9 )June 28, 2001 annual grant of Non-Employee Director Stock Options. Options 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.

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