Company:  REGENERON PHARMACEUTICALS ... (REGN)
Form Type:  4
Filing Date:  5/4/2012 
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: 
$250.31   		Change: 
-4.56 (-1.79%)  
Trade Time: 
May 24   		Market Cap: 
$24.01B
Description of Business
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  FORM 4
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES
  EXHIBIT 24
    POWER OF ATTORNEY
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