Company:  MERCK & CO. INC. (MRK)
Form Type:  4
Filing Date:  3/1/2012 
CIK:  0000310158 
Address:  ONE MERCK DRIVE
P.O. BOX 100
 
City, State, Zip:  WHITEHOUSE STATION, New Jersey 08889-0100 
Telephone:  908-423-4840 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$47.33  
Change: 
2.12 (4.69%)  
Trade Time: 
04:00 PM EST  
Market Cap: 
$142.92B
Description of Business
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  FORM 4
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES