Company:  REGENERON PHARMACEUTICALS ... (REGN)
Form Type:  10-Q
Filing Date:  4/30/2009 
CIK:  0000872589 
Address:  777 OLD SAW MILL RIVER RD 
City, State, Zip:  TARRYTOWN, New York 10591-6707 
Telephone:  (914) 347-7000 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$26.26   		Change: 
0.49 (1.90%)  
Trade Time: 
Feb 09   		Market Cap: 
$2.05B
Description of Business
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  FORM 10-Q
    PART I. FINANCIAL INFORMATION
      ITEM 1. FINANCIAL STATEMENTS
        BALANCE SHEET
        INCOME STATEMENT
        STOCKHOLDERS EQUITY
        CASH FLOW
        Notes to Condensed Financial Statements (Unaudited)
      ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET ...
      Item 4. Controls and Procedures
    PART II. OTHER INFORMATION
      ITEM 1. LEGAL PROCEEDINGS
      ITEM 1A. RISK FACTORS
      ITEM 6. EXHIBITS
    SIGNATURE
  EXHIBIT 10.1
  EXHIBIT 10.2
  EXHIBIT 10.3
  EXHIBIT 31.1
  EXHIBIT 31.2
  EXHIBIT 32
    Certification of CEO and CFO Pursuant to
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