Company:  UNITED MICROELECTRONICS C ... (UMC)
Form Type:  20-F
Filing Date:  4/29/2011 
CIK:  0001033767 
Address:  978 HIGHLANDS CIRCLE 
City, State, Zip:  LOS ALTOS, California 94024 
Telephone:  (650) 968-8855 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$2.17  
Change: 
-0.05 (-2.25%)  
Trade Time: 
04:00 PM EST  
Market Cap: 
$5.49B
Description of Business
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  FORM 20-F
    PART I
      ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS
      ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE
      ITEM 3. KEY INFORMATION
      ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS
      ITEM 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES
        NAME AND TITLE
      ITEM 7. MAJOR STOCKHOLDERS AND RELATED PARTY TRANSACTIONS
        BENEFICIAL OWNERS
      ITEM 8. FINANCIAL INFORMATION
      ITEM 9. THE OFFER AND LISTING
      ITEM 10. ADDITIONAL INFORMATION
      ITEM 11. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY ...
    PART II
      ITEM 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES
      ITEM 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY ...
      ITEM 15. CONTROLS AND PROCEDURES
        Attestation Report of the Independent Registered Public ...
        REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
      ITEM 16A. AUDIT COMMITTEE FINANCIAL EXPERT
      ITEM 16B. CODE OF ETHICS
      ITEM 16C. PRINCIPAL ACCOUNTANT FEES AND SERVICES
      ITEM 16D. EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT ...
      ITEM 16E. PURCHASE OF EQUITY SECURITIES BY THE ISSUER AND ...
      ITEM 16F. CHANGE IN REGISTRANT'S CERTIFYING ACCOUNTANT
      ITEM 16G. CORPORATE GOVERNANCE
    PART III
      ITEM 17. FINANCIAL STATEMENTS
      ITEM 18. FINANCIAL STATEMENTS
      ITEM 19. EXHIBITS
    BENEFICIAL OWNERS
    SIGNATURES
    NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
    REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
    BALANCE SHEET
    INCOME STATEMENT
    STOCKHOLDERS EQUITY
    STOCKHOLDERS EQUITY
    STOCKHOLDERS EQUITY
    CASH FLOW
    CASH FLOW
    BENEFICIAL OWNERS
    BENEFICIAL OWNERS
    BENEFICIAL OWNERS
    STOCKHOLDERS EQUITY
    INCOME STATEMENT
    STOCKHOLDERS EQUITY
  EXHIBIT 1.1
  EXHIBIT 8.1
  EXHIBIT 12.1
  EXHIBIT 12.2
  EXHIBIT 13.1
  EXHIBIT 13.2
  EXHIBIT 15.1