Company:  ALKERMES PLC. (ALKS)
Form Type:  S-1
Filing Date:  2/16/2012 
CIK:  0001520262 
Address:  TREASURY BUILDING
LOWER GRAND CANAL STREET
 
City, State, Zip:  DUBLIN 2,  00000 
Telephone:  00-353-1-649-2000 
Fiscal Year:  03/31 
Last Trade
Last Trade: 
$31.75  
Change: 
-0.23 (-0.72%)  
Trade Time: 
May 22  
Market Cap: 
$4.23B
Description of Business
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  FORM S-1
    CALCULATION OF REGISTRATION FEE
    TABLE OF CONTENTS
    SUMMARY
    Risk Factors
    THE OFFERING
    SUMMARY HISTORICAL FINANCIAL DATA
    RISK FACTORS
    CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS
    USE OF PROCEEDS
    MARKET PRICE OF ORDINARY SHARES
    DIVIDEND POLICY
    CAPITALIZATION
    SELECTED HISTORICAL FINANCIAL DATA
    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
      Liquidity and Capital Resources of Alkermes
    BUSINESS
      Competition
      Employees
    Available Information
      Properties
      Legal Proceedings
      NAME AND TITLE
    EXECUTIVE COMPENSATION
      OPTIONS
      COMPENSATION TABLE
    Compensation of Directors
      Compensation Committee Interlocks and Insider Participation
    PRINCIPAL AND SELLING SHAREHOLDERS
      BENEFICIAL OWNERS
      BENEFICIAL OWNERS
    CERTAIN RELATIONSHIPS AND RELATED PERSON TRANSACTIONS
    Policy Concerning Related Person Transactions
    DESCRIPTION OF ORDINARY SHARES
    SHARES ELIGIBLE FOR FUTURE SALE
    CERTAIN IRISH AND UNITED STATES FEDERAL INCOME TAX ...
    PLAN OF DISTRIBUTION
    LEGAL MATTERS
    EXPERTS
    INDEX TO FINANCIAL STATEMENTS
      REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
        BALANCE SHEET
        INCOME STATEMENT
        STOCKHOLDERS EQUITY
        CASH FLOW
      NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
        STOCKHOLDERS EQUITY
      REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
        BALANCE SHEET
        INCOME STATEMENT
        CASH FLOW
    PART II
      Item 13. Other Expenses of Issuance and Distribution
      Item 14. Indemnification of Directors and Officers
      Item 15. Recent Sales of Unregistered Securities
      Item 16. Exhibits and Financial Statements
      Item 17. Undertakings
    SIGNATURES
    POWER OF ATTORNEY
    EXHIBIT INDEX
  EXHIBIT 5.1
  EXHIBIT 21.1
    SUBSIDIARIES
  EXHIBIT 23.2
    Consent of Independent Registered Public Accounting Firm
  EXHIBIT 23.3
    CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM