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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 3)*

Ligand Pharmaceuticals Inc
(Name of Issuer)
Common Stock
(Title of Class of Securities)
53220K504
(CUSIP Number)
December 31, 2010
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

     þ Rule 13d-1(b)

     o Rule 13d-1(c)

     o Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 
 

 

                     
CUSIP No.
  
53220K504 
  

 

           
1   NAMES OF REPORTING PERSONS

UBS AG directly and on behalf of certain subsidiaries
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
  (a)   o
  (b)   o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Switzerland
       
  5   SOLE VOTING POWER
     
NUMBER OF   986,420
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   986,420
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  986,420
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  5.02%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  BK

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CUSIP No.
  
53220K504 
  
     
Item 1(a)  
Name of Issuer
   
 
   
Ligand Pharmaceuticals Inc
   
 
Item 1(b)  
Address of Issuer’s Principal Executive Offices:
   
 
   
11085 North Torrey Pines Road
   
La Jolla, California 92037
   
 
Item 2(a)  
Name of Person Filing:
   
 
   
UBS AG
   
 
Item 2(b)  
Address of Principal Business Office:
   
 
   
UBS AG
   
Bahnhofstrasse 45
   
PO Box CH-8021
   
Zurich, Switzerland
   
 
Item 2(c)  
Citizenship or Place of Organization:
   
 
   
Switzerland
   
 
Item 2(d)  
Title of Class of Securities
   
 
   
Common Stock
   
 
Item 2(e)  
CUSIP Number(s):
   
 
   
53220K504
   
 
Item 3.  
Type of Person Filing:
   
 
   
UBS AG is classified as a Bank as defined in section 3(a)(6) of the Securities Act or 1933 pursuant to no-action relief granted by the staff of the Securities and Exchange Commission.
   
 
Item 4 (a)-(c)(iv).  
Ownership:
   
 
   
Items 5-11 of the cover page are incorporated by reference.

 

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CUSIP No.
  
53220K504 
  
     
Item 5.  
Ownership of Five Percent or Less of a Class:
   
 
   
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following o.
   
 
Item 6.  
Ownership of More than Five Percent on Behalf of Another Person:
   
 
   
Not applicable
   
 
Item 7.  
Identification and Classification of the Subsidiary That Acquired the Security Being Reported on By the Parent Holding Company:
   
 
   
This statement on Schedule 13G is being filed by UBS AG on behalf of itself and its wholly owned subsidiaries UBS AG London Branch, UBS Securities LLC, and UBS Financial Services Inc.
   
 
Item 8.  
Identification and Classification of Members of the Group
   
 
   
Not Applicable
   
 
Item 9  
Notice of Dissolution of Group:
   
 
   
Not Applicable
   
 
Item 10.  
Certification:
   
 
   
By signing below, the undersigned certify that, to the best of their knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

 

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CUSIP No.
  
53220K504 
  
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
         
     
  By:   /s/ Anthony DeFilippis    
    Executive Director   
       
     
  By:   /s/ Gordon Kiesling    
    Executive Director   
       
 
Date: January 31, 2011

 

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