Company:  IPG PHOTONICS CORP (IPGP)
Form Type:  10-K
Filing Date:  2/27/2012 
CIK:  0001111928 
Address:  50 Old Webster Road 
City, State, Zip:  Oxford, Massachusetts 01540 
Telephone:  508-373-1100 
Last Trade
Last Trade: 
$62.21  
Change: 
-0.93 (-1.47%)  
Trade Time: 
02:15 PM EST  
Market Cap: 
$3.20B
Description of Business
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  FORM 10-K
    PART I
      ITEM 1. BUSINESS
      ITEM 1A. RISK FACTORS
      ITEM 1B. UNRESOLVED STAFF COMMENTS
      ITEM 2. PROPERTIES
      ITEM 3. LEGAL PROCEEDINGS
      ITEM 4. MINE SAFETY DISCLOSURES
    PART II
      ITEM 5. MARKET FOR THE REGISTRANT'S COMMON EQUITY, RELATED ...
      ITEM 6. SELECTED FINANCIAL DATA
      ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
        Results of Operations
        Liquidity and Capital Resources
      ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
      ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ...
      ITEM 9A. CONTROLS AND PROCEDURES
      REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
      ITEM 9B. OTHER INFORMATION
    PART III
      ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
      ITEM 11. EXECUTIVE COMPENSATION
      ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND ...
      ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND ...
      ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES
    PART IV
      ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
    SIGNATURES
    REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
    BALANCE SHEET
    INCOME STATEMENT
    STOCKHOLDERS EQUITY
    STOCKHOLDERS EQUITY
    CASH FLOW
    NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
    INDEX TO EXHIBITS
  EXHIBIT 12.1
    RATIO COMPUTATION
  EXHIBIT 21.1
    SUBSIDIARIES
  EXHIBIT 23.1
    CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
  EXHIBIT 31.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
  EXHIBIT 31.2
    CERTIFICATION OF CHIEF FINANCIAL OFFICER
  EXHIBIT 32.1
    CERTIFICATION PURSUANT TO