e424b3
 

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-136188
PROSPECTUS SUPPLEMENT NO. 4
(TO PROSPECTUS DATED JULY 31, 2006)
$750,000,000
ALLERGAN, INC.
1.50% CONVERTIBLE SENIOR NOTES DUE 2026
SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THE NOTES
     This Prospectus Supplement No. 4 supplements and amends the Prospectus dated July 31, 2006 (as amended, the “Prospectus”), relating to the resale from time to time by holders of our 1.50% Convertible Senior Notes Due 2026 and shares of our common stock issuable upon the conversion of the notes of such securities. Such information has been obtained from the selling securityholders. This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement.
     The information appearing in the table below, as of the date hereof, supplements and amends the information in the table appearing under the heading “Selling Securityholders” in the Prospectus, and, where the name of a Selling Securityholder identified in the table below also appears in the table in the Prospectus, the information set forth in the table below regarding that Selling Securityholder supercedes the information in the Prospectus:
                                 
    PRINCIPAL                
    AMOUNT OF                
    NOTES           COMMON   COMMON
    BENEFICIALLY   PERCENTAGE   STOCK OWNED   STOCK
    OWNED AND   OF NOTES   PRIOR TO THE   OFFERED
NAME OF SECURITY HOLDER   OFFERED HEREBY   OUTSTANDING   OFFERING   HEREBY (1)
Arctos Partners Inc.
   $ 11,680,000       1.56 %     0       92,215  
Delta Master Airlines Trust (2)
     645,000       *       276 (3)     5,092  
Delta Master Airlines Trust (4)
     1,050,000       *       0       8,289  
Delta Master Airlines Trust-CV (5)
     1,200,000       *       0       9,474  
GLG Global Convertible Fund
     7,500,000       1.00 %     0       59,214  
GLG Investments PLC — sub-fund: GLG Global Convertible UCITS Fund
     15,000,000       2.00 %     0       118,428  
GLG Investments PLC — sub-fund: GLG Global Convertible UCITS (Distributing) Fund
     250,000       *       0       1,973  
GLG Market Neutral Fund
     7,500,000       1.00 %     0       59,214  
 
*   Less than one percent.
 
(1)   The number of shares of common stock offered hereby includes shares of common stock into which the notes are convertible. The number of shares of common stock offered hereby is based on a conversion rate of 7.8952 shares of common stock per $1,000 principal amount of maturity of the notes. Information concerning other Selling Securityholders will be set forth in prospectus supplements from time to time, if required. The number of shares of common stock owned by the other Selling Securityholders or any future transferee from any such holder assumes that they do not beneficially own any common stock other than common stock into which the notes are convertible at a conversion rate of 7.8952 shares of common stock per $1,000 principal amount of maturity of the notes.
 
(2)   c/o Froley Revy Investment Co., Attention: Yadranka Draskovic, Portfolio Administrator, 10900 Wilshire Blvd., Suite 900, Los Angeles, CA 90024.

 

 

(3)   The number of shares of common stock owned prior to the offering is based upon the shares issuable upon the conversion of an additional principal amount of the 1.50% Convertible Senior Notes Due 2026 beneficially owned by the selling securityholder the sale of which was previously registered.
 
(4)   c/o Calamos Advisors, LLC, Attention: Tessa Palomo, 2020 Calamos Court, Naperville, IL 60563-2787.
 
(5)   Oaktree Capital Management, LLC, Attention: Anthony Carpenter, 333 S. Grand Ave., 28th Floor, Los Angeles, CA 90071.
     INVESTING IN THE NOTES OR THE COMMON STOCK ISSUABLE UPON CONVERSION OF THE NOTES INVOLVES A HIGH DEGREE OF RISK. PLEASE CONSIDER THE “RISK FACTORS” BEGINNING ON PAGE 5 OF THE PROSPECTUS.
     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THE PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
The date of this prospectus supplement is August 30, 2006.