Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Dietl Deanna
 2. Date of Event Requiring Statement (Month/Day/Year)
03/25/2009		 3. Issuer Name and Ticker or Trading Symbol
MEDAREX INC [MEDX]
(Last)
(First)
(Middle)
MEDAREX, INC., 707 STATE ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP, Human Resources
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PRINCETON, NJ 08540		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 1,786
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Options   (1) 11/01/2009 Common Stock 5,000 $ 3.43 D  
Stock Options   (1) 07/11/2012 Common Stock 3,959 $ 7.04 D  
Stock Options   (1) 07/11/2012 Common Stock 6,041 $ 6.37 D  
Stock Options   (1) 09/19/2011 Common Stock 6,700 $ 6.33 D  
Stock Options   (1) 02/05/2011 Common Stock 2,500 $ 6.33 D  
Stock Options   (1) 11/24/2013 Common Stock 10,938 $ 6.7 D  
Stock Options   (1) 11/24/2013 Common Stock 4,062 $ 6.455 D  
Stock Options   (1) 07/26/2014 Common Stock 13,000 $ 5.605 D  
Stock Options   (2) 09/06/2015 Common Stock 15,000 $ 10.06 D  
Stock Options   (3) 07/28/2016 Common Stock 20,000 $ 9.555 D  
Stock Options   (4) 08/31/2017 Common Stock 13,965 $ 17.27 D  
Stock Options   (5) 03/03/2018 Common Stock 15,536 $ 9.065 D  
Stock Options   (6) 03/05/2019 Common Stock 23,300 $ 3.72 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Dietl Deanna
MEDAREX, INC.
707 STATE ROAD
PRINCETON, NJ 08540		       VP, Human Resources  

Signatures

Deanna Dietl 04/02/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Fully vested and exercisable.
(2) 13,125 shares are fully vested and exercisable; the remainder vests ratably on a monthly basis through 9/6/2009.
(3) 13,333 shares are fully vested and exercisable; the remainder vests ratably on a monthly basis through 7/28/2010.
(4) 5,527 shares are fully vested and exercisable; the remainder vests ratably on a monthly basis through 8/31/2011.
(5) 3,884 shares are fully vested and exercisable; the remainder vests ratably on a monthly basis through 3/3/2012.
(6) 5,825 shares vest on 3/5/2010; the remainder vests ratably on a monthly basis through 3/5/2013.

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