| 
                 Delaware 
               | 
              
                 41-2170618 
               | 
            
| 
                 (State
                  or Other Jurisdiction of Incorporation or
                  Organization) 
               | 
              
                 (I.R.S.
                  Employer Identification
                  No.) 
               | 
            
| 
                 Title
                  of Each Class of 
                Securities
                  to be Registered 
               | 
              
                 Amount 
                to
                  be 
                Registered(1) 
               | 
              
                 Proposed
                  Maximum 
                Offering
                  Price 
                Per
                  Unit(2) 
               | 
              
                 Proposed
                  Maximum 
                Aggregate 
                Offering
                  price(2) 
               | 
              
                 Amount
                  of 
                Registration
                  Fee 
               | 
              ||||||||||||
| 
                 Common
                  stock, $.001 par value 
               | 
              
                 10,501,000 
               | 
              $ | 
                 6.27 
               | 
              $ | 
                 65,841,270 
               | 
              $ | 
                 2,021 
               | 
              |||||||||
| 
                 (1) 
               | 
              
                 In
                  the event of a stock split, stock dividend, anti-dilution adjustment
                  or
                  similar transaction involving common stock of the Registrant, in
                  order to
                  prevent dilution, the number of shares registered shall be automatically
                  increased to cover the additional shares in accordance with Rule
                  416(a)
                  under the Securities Act. 
               | 
            
| 
                 (2) 
               | 
              
                 The
                  proposed maximum offering price per share has been estimated solely
                  for
                  the purpose of calculating the registration fee pursuant to Rule
                  457(c) of
                  the Securities Act of 1933 and is based upon the average of high
                  and low
                  sales prices of the Registrant’s common stock on the Nasdaq Global Market
                  on November 14, 2007. 
               | 
            
| 
                 Page 
               | 
            |
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                 Prospectus
                  Summary 
               | 
              
                 3 
               | 
            
| 
                 Risk
                  Factors 
               | 
              
                 5 
               | 
            
| 
                 Special
                  Note Regarding Forward-Looking Statements 
               | 
              
                 5 
               | 
            
| 
                 Use
                  of Proceeds 
               | 
              
                 6 
               | 
            
| 
                 Dividend
                  Policy 
               | 
              
                 6 
               | 
            
| 
                 Selling
                  Security Holder 
               | 
              
                 6 
               | 
            
| 
                 Plan
                  of Distribution 
               | 
              
                 8 
               | 
            
| 
                 Incorporation
                  of Certain Information by Reference 
               | 
              
                 9 
               | 
            
| 
                 Legal
                  Matters 
               | 
              
                 10 
               | 
            
| 
                 Experts 
               | 
              
                 10 
               | 
            
| 
                 Transfer
                  Agent and Registrar 
               | 
              
                 11 
               | 
            
| 
                 Where
                  You Can Find Additional Information 
               | 
              
                 11 
               | 
            
| 
                 Common
                  stock offered by the selling security holder 
               | 
              
                 10,501,000
                  shares(1) 
               | 
            
| 
                 Common
                  stock outstanding prior to this offering 
               | 
              
                 40,604,714
                  shares 
               | 
            
| 
                 Common
                  stock to be outstanding after this offering 
               | 
              
                 51,104,714
                  shares 
               | 
            
| 
                 Use
                  of proceeds 
               | 
              
                 All
                  proceeds of this offering will be received by the selling security
                  holder
                  for its own account.  See “Use of Proceeds.” 
               | 
            
| 
                 Nasdaq
                  Global Market symbol 
               | 
              
                 PEIX 
               | 
            
| 
                 | 
              
                 (1)
                  Represents 1,000 shares of common stock held directly and 10,500,000
                  shares of common stock underlying our Series A Preferred
                  Stock. 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 1,115,761
                  shares of common stock remaining reserved for issuance under our
                  2006
                  Stock Incentive Plan; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 175,000
                  shares of common stock remaining reserved for issuance under our
                  2004
                  Stock Option Plan, of which options to purchase 175,000 shares
                  were
                  outstanding as of that date, at a weighted average exercise price
                  of $7.30
                  per share; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 options
                  to purchase 50,000 shares of common stock outstanding as of that
                  date
                  under our Amended 1995 Incentive Stock Plan, at a weighted average
                  exercise price of $5.72 per share; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 723,952
                  shares of common stock underlying warrants outstanding as of that
                  date, at
                  a weighted average exercise price of $11.85 per share;
                  and 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 any
                  additional shares of common stock we may issue from time to time
                  after
                  that date. 
               | 
            
| 
                 Shares
                  of Common Stock 
                Beneficially
                  Owned 
                Prior
                  to Offering    
               | 
              
                 Shares
                  of Common Stock 
                Being 
               | 
              
                 Shares
                  of Common
                  Stock 
                Beneficially
                  Owned 
                After
                  Offering    
               | 
              ||||||||||||||||||
| 
                 Name
                  and Address of Beneficial
                  Owner                     
               | 
              
                 Number 
               | 
              
                 Percentage 
               | 
              
                 Offered 
               | 
              
                 Number 
               | 
              
                 Percentage 
               | 
              |||||||||||||||
| 
                 Cascade
                  Investment, L.L.C. 
                2365
                  Carillon Point 
                Kirkland,
                  Washington  98033 
               | 
              10,501,000 | (1) | 20.55 | % | 10,501,000 | (1) | 
                 – 
               | 
              
                 * 
               | 
              ||||||||||||
| 
                 | 
              
                 * 
               | 
              
                 Less
                  than 1.0%. 
               | 
            
| 
                 (1)    
                   
               | 
              
                 Represents
                  1,000 shares of common stock held directly and 10,500,000 shares
                  of common
                  stock underlying our Series A Preferred
                  Stock. 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 ordinary
                  brokerage transactions and transactions in which the broker-dealer
                  solicits purchasers; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 block
                  trades in which the broker-dealer will attempt to sell the shares
                  as agent
                  but may position and resell a portion of the block as principal
                  to
                  facilitate the transaction; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 purchases
                  by a broker-dealer as principal and resale by the broker-dealer
                  for its
                  account; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 an
                  exchange distribution in accordance with the rules of the applicable
                  exchange; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 privately
                  negotiated transactions; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 short
                  sales; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 broker-dealers
                  may agree with the selling security holder to sell a specified
                  number of
                  such shares at a stipulated price per
                  share; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 a
                  combination of any such methods of sale;
                  and 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 any
                  other method permitted pursuant to applicable
                  law. 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Quarterly Report on Form 10-Q for the three months ended September
                  30,
                  2007, as filed with the Commission on November 9,
                  2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for October 8, 2007, as filed with the
                  Commission on October 12, 2007 (File No.
                  0-21467); 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for October 1, 2007, as filed with the
                  Commission on October 5, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Quarterly Report on Form 10-Q for the three months ended June 30,
                  2007, as
                  filed with the Commission on August 9,
                  2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for August 8, 2007, as filed with the
                  Commission on August 9, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for July 18, 2007, as filed with the
                  Commission
                  on July 23, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for June 8, 2007, as filed with the
                  Commission
                  on June 8, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Quarterly Report on Form 10-Q for the three months ended March
                  31, 2007,
                  as filed with the Commission on May 10,
                  2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for May 4, 2007, as filed with the Commission
                  on May 10, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Proxy Statement for our 2007 Annual Meeting of Stockholders, as
                  filed with
                  the Commission on April 27, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Amendment No. 1 to Annual Report on Form 10-K for the year ended
                  December
                  31, 2006, as filed with the Commission on April 23,
                  2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for April 13, 2007, as filed with the
                  Commission on April 13, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Annual Report on Form 10-K for the year ended December 31, 2006,
                  as filed
                  with the Commission on March 12,
                  2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for February 27, 2007, as filed with
                  the
                  Commission on March 5, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K/A for March 1, 2007, as filed with the
                  Commission on March 2, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for March 1, 2007, as filed with the
                  Commission
                  on March 1, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K for January 10, 2007, as filed with
                  the
                  Commission on January 17, 2007; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 Our
                  Current Report on Form 8-K/A for October 17, 2006, as filed with
                  the
                  Commission on January 3, 2007; and 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 The
                  description of our capital stock contained in our Current Report
                  on Form
                  8-K for June 8, 2007, as filed with the Commission on June 8, 2007,
                  including any amendments or reports filed for the purpose of updating
                  such
                  description. 
               | 
            
| 
                 SEC
                  registration fee 
               | 
              $ | 
                 2,021 
               | 
              ||
| 
                 Legal
                  fees and expenses 
               | 
              
                 25,000 
               | 
              |||
| 
                 Accounting
                  fees and expenses  
               | 
              
                 10,000 
               | 
              |||
| 
                 Printing
                  expenses  
               | 
              
                 — 
               | 
              |||
| 
                 Blue
                  sky fees and expenses 
               | 
              
                 — 
               | 
              |||
| 
                 Transfer
                  agent and registrar fees and expenses  
               | 
              
                 — 
               | 
              |||
| 
                 Miscellaneous  
               | 
              
                 — 
                 | 
              |||
| 
                 Total   
               | 
              $ | 
                 37,021 
                 | 
              
| 
                 | 
              
                 · 
               | 
              
                 the
                  Registrant shall indemnify its directors and officers for serving
                  the
                  Registrant in those capacities or for serving other business enterprises
                  at the Registrant’s request, to the fullest extent permitted by Delaware
                  law; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 the
                  Registrant may, in its discretion, indemnify employees and agents
                  in those
                  circumstances where indemnification is not required by
                  law; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 the
                  Registrant is required to advance expenses, as incurred, to its
                  directors
                  and officers in connection with defending a proceeding, except
                  that such
                  director or officer shall undertake to repay such advance if it
                  is
                  ultimately determined that such person is not entitled to
                  indemnification; 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 the
                  rights conferred in the bylaws are not exclusive, and the Registrant
                  is
                  authorized to enter into indemnification agreements with its directors,
                  officers, employees and agents and to obtain insurance to indemnify
                  such
                  persons; and 
               | 
            
| 
                 | 
              
                 · 
               | 
              
                 the
                  Registrant may not retroactively amend the bylaw provisions to
                  reduce its
                  indemnification obligations to directors, officers, employees and
                  agents. 
               | 
            
| 
                 Exhibit 
                Number 
               | 
              
                 Description 
               | 
            
| 
                 4.1 
               | 
              
                 Purchase
                  Agreement dated November 14, 2005 between Pacific Ethanol, Inc.
                  and
                  Cascade Investment, L.L.C. (1) 
               | 
            
| 
                 4.2 
               | 
              
                 Certificate
                  of Designations, Powers, Preferences and Rights of the Series A
                  Cumulative
                  Redeemable Convertible Preferred Stock (2) 
               | 
            
| 
                 4.3 
               | 
              
                 Registration
                  Rights and Stockholders Agreement dated April 13, 2006 between
                  Pacific
                  Ethanol, Inc. and Cascade Investment, L.L.C. (2) 
               | 
            
| 
                 5.1 
               | 
              
                 Opinion
                  of Rutan & Tucker, LLP (*) 
               | 
            
| 
                 23.1 
               | 
              
                 Consent
                  of Independent Registered Public Accounting Firm (*) 
               | 
            
| 
                 23.2 
               | 
              
                 Consent
                  of Rutan & Tucker, LLP (contained in Exhibit 5.1)
                  (*) 
               | 
            
| 
                 24.1 
               | 
              
                 Power
                  of Attorney (contained in the signature page hereto)
                  (*) 
               | 
            
| 
                 (*) 
               | 
              
                 Filed
                  herewith. 
               | 
            
| 
                 (1) 
               | 
              
                 Filed
                  as an exhibit to the Registrant’s current report on Form 8-K for November
                  10, 2005 filed with the Securities and Exchange Commission on November
                  15,
                  2005 and incorporated herein by reference (File No.
                  0-21467). 
               | 
            
| 
                 (2) 
               | 
              
                 Filed
                  as an exhibit to the Registrant’s Current Report on Form 8-K for April 13,
                  2006 filed with the Securities and Exchange Commission on April
                  19, 2006
                  and incorporated herein by
                  reference. 
               | 
            
| 
                 | 
              
                 PACIFIC
                  ETHANOL, INC. 
               | 
            
| 
                 | 
              
                 By:
                  /s/ NEIL M.
                  KOEHLER                        
                   
                Neil M. Koehler 
                President and Chief Executive
                  Officer 
               | 
              
| 
                 Name 
                 | 
              
                 Title 
                 | 
              
                 Date 
                 | 
            
| 
                 /s/
                  WILLIAM L.
                  JONES          
                   
                William
                  L. Jones 
               | 
              
                 Chairman
                  of the Board and Director 
               | 
              
                 November
                  15, 2007 
               | 
            
| 
                 /s/
                  NEIL M.
                  KOEHLER            
                   
                Neil
                  M. Koehler 
               | 
              
                 President,
                  Chief Executive Officer and Director (principal executive
                  officer) 
               | 
              
                 November
                  15, 2007 
               | 
            
| 
                 /s/
                  JOHN T.
                  MILLER               
                   
                John
                  T. Miller 
               | 
              
                 Acting
                  Chief Financial Officer (principal financial and accounting officer)
                   
              and Chief Operating Officer  | 
              
                 November
                  15, 2007 
               | 
            
| 
                 /s/
                  TERRY L.
                  STONE                
                Terry
                  L. Stone 
               | 
              
                 Director 
               | 
              
                 November
                  15, 2007 
               | 
            
| 
                 /s/
                  JOHN L.
                  PRINCE                
                   
                John
                  L. Prince 
               | 
              
                 Director 
               | 
              
                 November
                  15, 2007 
               | 
            
| 
                 /s/
                  DOUGLAS L. KIETA        
                   
                Douglas
                  L. Kieta 
               | 
              
                 Director 
               | 
              
                 November
                  15, 2007 
               | 
            
| 
                  Exhibit 
                Number 
               | 
              
                 Description 
               | 
            ||
| 
                 5.1 
               | 
              
                 Opinion
                  of Rutan & Tucker, LLP 
               | 
              ||
| 
                 23.1 
               | 
              
                 Consent
                  of Independent Registered Public Accounting Firm 
               | 
              ||
| 
                 23.2 
               | 
              
                 Consent
                  of Rutan & Tucker, LLP (contained in Exhibit 5.1) 
               | 
              ||
| 
                 24.1 
               | 
              
                 Power
                  of Attorney (contained in the signature page to the registration
                  statement) 
               | 
              ||