FILED PURSUANT TO RULE 424(b)(3) REGISTRATION STATEMENT NO. 333-50524 PROSPECTUS SUPPLEMENT NO. 20 TO PROSPECTUS DATED DECEMBER 8, 2000 ALLERGAN, INC. LIQUID YIELD OPTION(TM) NOTES DUE 2020 (ZERO COUPON -- SUBORDINATED) ------------------------- The following information supplements, and must be read in connection with, the information contained in the Prospectus, dated December 8, 2000 (the "Prospectus"), of Allergan, Inc., a Delaware corporation. This Prospectus Supplement must be delivered with a copy of the Prospectus. All capitalized terms not otherwise defined herein have the respective meanings ascribed to them in the Prospectus. The following information replaces in its entirety the information provided in the Prospectus under the caption "Selling Securityholders." ------------------------ SELLING SECURITYHOLDERS The LYONs were originally issued by us and sold by Merrill Lynch, Pierce, Fenner & Smith Incorporated (the "Initial Purchaser") in a transaction exempt from the registration requirements of the Securities Act to persons reasonably believed by such Initial Purchaser to be "qualified institutional buyers" (as defined by Rule 144A under the Securities Act). The Selling Securityholders (which term includes their transferees, pledges, donees or successors) may from time to time offer and sell pursuant to this prospectus any and all of the LYONs and common stock. Set forth below are the names of each Selling Securityholder, the principal amount of LYONs that may be offered by such Selling Securityholder pursuant to this prospectus and the number of shares of common stock into which such LYONs are convertible. Unless set forth below, none of the Selling Securityholders has had a material relationship with us or any of our predecessors or affiliates within the past three years. The following table sets forth certain information received by us on or prior to January 30, 2002. However, any or all of the LYONs or common stock listed below may be offered for sale pursuant to this prospectus by the Selling Securityholders from time to time. Accordingly, no estimate can be given as to the amounts of LYONs or common stock that will be held by the Selling Securityholders upon consummation of any such sales. In addition, the Selling Securityholders identified below may have sold, transferred, or otherwise disposed of all or a portion of their LYONs since the date on which the information regarding their LYONs was provided, in transactions exempt from the registration requirements of the Securities Act. AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ 1976 Distribution Trust F/B/O A.R Lauder/Zinterkhoffer .......................... $ 32,000 * -- 184 1976 Distribution Trust F/B/O Jene A. Lauder .... 32,000 * -- 184 AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ AIB Securities Services ......................... 22,800,000 3.47 -- 131,362 AIG Soundshore Opportunity Holding Fund Ltd. ..................................... 4,250,000 * -- 24,486 AIG Soundshore Strategic Holding Fund Ltd. ..................................... 4,250,000 * -- 24,486 AIG/National Union Fire Insurance ............... 2,035,000 * -- 11,725 Allstate Life Insurance Company ................. 5,500,000 * 31,000(2) 31,688 Aloha Airlines Non-Pilots Pension Trust ......... 375,000 * -- 2,161 Aloha Pilots Retirement Trust ................... 210,000 * -- 1,210 American Fidelity Assurance Company ............. 200,000 * -- 1,152 American Motorist Insurance Company ............. 1,309,000 * -- 7,542 Amerisure Companies/Michigan Mutual Insurance Co. ................................. 550,000 * -- 3,169 AmSouth Bank, Custodian for AmSouth Variable Equity Income Fund ................... 2,180,000 * -- 12,560 AmSouth Bank, Custodian for AmSouth Equity Income Fund ............................ 4,900,000 * -- 28,231 Arapahoe County Colorado ........................ 111,000 * -- 640 Arkansas Teachers Retirement .................... 9,113,000 1.39 -- 52,505 Arpeggo Fund, LP ................................ 4,200,000 * -- 24,198 Associated Electric & Gas Insurance Services Limited ....................................... 1,000,000 * -- 5,762 Attorney's Title Insurance Fund, Inc. ........... 500,000 * -- 2,881 Aventis Pension Master Trust .................... 385,000 * -- 2,218 Banc of America Securities LLC .................. 500,000 * -- 2,881 Bancroft Convertible Fund, Inc. ................. 815,000 * -- 4,696 Bank Austria Cayman Island, Ltd. ................ 2,500,000 * -- 14,404 Baptist Health of South Florida ................. 482,000 * -- 2,777 Bay County PERS ................................. 455,000 * -- 2,621 Blue Cross Blue Shield of Florida ............... 2,000,000 * -- 11,523 Boilermaker - Blacksmith Pension Trust .......... 2,275,000 * -- 13,107 Boston Museum of Fine Art ....................... 245,000 * -- 1,412 British Virgin Islands Social Security Board ......................................... 84,000 * -- 484 BS Debt Income Fund - Class A ................... 25,000 * -- 144 C & H Sugar Company, Inc. ....................... 575,000 * -- 3,313 CA State Automobile Assn Inter-Insurance ............................... 1,100,000 * -- 6,338 CALAMOS(R) Convertible Fund - CALAMOS(R) Investment Trust ................... 3,690,000 * -- 21,260 CALAMOS(R) Convertible Growth and Income Fund - CALAMOS(R) Investment Trust ............................. 2,370,000 * -- 13,655 CALAMOS(R) Convertible Portfolio - CALAMOS(R) Advisors Trust .................... 150,000 * -- 864 2 AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ CALAMOS(R) Global Convertible Fund - CALAMOS(R) Investment Trust ................... 500,000 * -- 2,881 California State Automobile Inter Insurance ..................................... 390,000 * -- 2,247 California State Automobile Retirement Pension ....................................... 90,000 * -- 519 Capital Care, Inc. .............................. 60,000 * -- 346 CareFirst of Maryland, Inc. ..................... 275,000 * -- 1,584 Charitable Convertible Securities Fund .......... 380,000 * -- 2,189 Charitable Income Fund .......................... 150,000 * -- 864 Chrysler Corporation Master Retirement Trust .... 2,960,000 * -- 17,054 CIBC World Markets International Arbitrage Corp .......................................... 8,000,000 1.22 -- 46,092 City of Albany Pension Plan ..................... 215,000 * -- 1,239 City of Birmingham Retirement & Relief System ................................. 1,800,000 * -- 10,371 City of Knoxville Pension System ................ 520,000 * -- 2,996 City University of New York ..................... 271,000 * -- 1,561 Clinton Riverside Convertible Portfolio Limited ....................................... 3,000,000 * -- 17,285 Conseco Annuity Assurance - Multi-bucket Annuity Convertible Bond Fund ................. 9,000,000 1.37 -- 51,854 Conseco Fund Group - Convertible Securities Fund .......................................... 2,000,000 * -- 11,523 Continental Assurance Company ................... 1,400,000 * -- 8,066 Continental Casualty Company .................... 7,600,000 1.16 -- 43,787 Credit Suisse First Boston Corporation .......... 13,663,000 2.08 -- 78,719 Daimler Chrysler Corporation Emp. #1 Pension Plan DTD 4/1/89 ....................... 5,665,000 * -- 32,639 DeAm Convertible Arbitrage Fund ................. 3,500,000 * -- 20,165 Delta Air Lines Master Trust (c/o Oaktree Capital Management, LLC) ...................... 1,065,000 * -- 6,136 Delta Airlines Master Trust ..................... 4,280,000 * -- 24,659 Deutsche Bank Alex Brown Inc. ................... 39,000 * -- 225 Dorinco Reinsurance Company ..................... 1,500,000 * -- 8,642 EB Convertible Securities Fund .................. 800,000 * -- 4,609 Elf Aquitaine ................................... 400,000 * -- 2,305 Ellsworth Convertible Growth and Income Fund, Inc ........................................... 815,000 * -- 4,696 Engineers Joint Pension Fund .................... 1,006,000 * -- 5,796 Enterprise Convertible Security Fund ............ 127,000 * -- 732 Fidelity Financial Trust: Fidelity Convertible Securities Fund(3) ....... 10,800,000 1.64 -- 62,224 Fidelity Financial Trust: Fidelity Equity-Income Fund(3) ................ 18,103,000 2.75 -- 104,300 3 AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ Fidelity Management Trust Company on behalf of accounts managed by it(4) .............................. 1,097,000 * -- 6,320 Field Foundation of Illinois .................... 40,000 * -- 230 Finance Factors Limited ......................... 450,000 * -- 2,593 First Republic Bank ............................. 175,000 * -- 1,008 Franklin and Marshall College ................... 375,000 * -- 2,161 Free State Health Plan, Inc. .................... 80,000 * -- 461 GE Pension Trust ................................ 2,800,000 * -- 16,132 Global Bermuda Limited Partnership .............. 750,000 * -- 4,321 Genesee County Employees' Retirement System ........................................ 475,000 * -- 2,737 Goldman Sachs and Company ....................... 23,000,000 3.50 -- 132,515 Grady Hospital Foundation ....................... 243,000 * -- 1,400 Greek Catholic Union ............................ 35,000 * -- 202 Greek Catholic Union II ......................... 30,000 * -- 173 Group Hospitalization and Medical Services, Inc. ................................ 300,000 * -- 1,728 Gryphon Domestic III, LLC ....................... 12,200,000 1.86 -- 70,290 H.K. Porter Company, Inc. ....................... 60,000 * -- 346 Hamilton Partners Limited ....................... 1,000,000 * -- 5,762 Hawaiian Airlines Employees Pension Plan - IAM .................................... 170,000 * -- 979 Hawaiian Airlines Pension Plan for Salaried Employees ............................ 35,000 * -- 202 Hawaiian Airlines Pilots Retirement Plan ........ 330,000 * -- 1,901 HealthNow New York, Inc. ........................ 175,000 * -- 1,008 IL Annuity and Insurance Company ................ 6,000,000 * -- 34,569 Independence Blue Cross ......................... 235,000 * -- 1,354 ING Barings LLC ................................. 50,000 * -- 288 Investcorp-SAM Fund Limited ..................... 13,000,000 1.98 -- 74,900 Island Insurance Convertible Account ............ 310,000 * -- 1,786 Islands Holdings ................................ 125,000 * -- 720 Jackson County Employees' Retirement System ........................................ 375,000 * -- 2,161 Jefferies & Co. ................................. 4,000,000 * -- 23,046 Julius Baer Multibond Convertbond ............... 1,250,000 * -- 7,202 KBC Financial Products USA, Inc. ................ 1,000,000 * -- 5,762 Kerr McGee Corporation .......................... 1,750,000 * -- 10,083 Kettering Medical Center Funded Depreciation Account .......................... 145,000 * -- 835 Key Trust Convertible Securities Fund ........... 160,000 * -- 922 Key Trust Fixed Income Fund ..................... 210,000 * -- 1,210 Knoxville Utilities Board Retirement System ..... 335,000 * -- 1,930 Lakeshore International Ltd. .................... 1,750,000 * -- 10,083 Lancer Securities Cayman ........................ 1,400,000 * -- 8,066 Lehman Brothers Inc. ............................ 54,820,000 8.34 -- 315,845 Local Universities Support Corporation .......... 108,000 * -- 622 4 AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ Louisiana Workers' Compensation Corporation ..... 325,000 * -- 1,872 Lumberman's Mutual Casualty ..................... 1,039,000 * -- 5,986 Lutheran Brotherhood ............................ 3,000,000 * -- 17,285 Lydian Overseas Partners Master Fund ............ 24,000,000 3.65 -- 138,276 Macomb County Employees' Retirement System ...... 325,000 * -- 1,872 McMahan Securities Co. L.P. ..................... 975,000 * -- 5,617 Merrill Lynch Insurance Group ................... 569,000 * -- 3,278 Merrill Lynch, Pierce, Fenner & Smith, Inc.(5) .. 31,862,000 4.85 -- 183,573 Merrill Lynch Quantitative Advisors Securities Arbitrage Ltd. ................................ 11,500,000 1.75 -- 66,257 Morgan Stanley & Co. ............................ 20,000,000 3.04 -- 115,230 Morgan Stanley Dean Witter Convertible Securities Trust .............................. 3,600,000 * -- 20,741 Motion Picture Industry Health Plan - Active Member Fund ............................ 345,000 * -- 1,988 Motion Picture Industry Health Plan - Retiree Member Fund ........................... 175,000 * -- 1,008 Museum of Fine Arts, Boston ..................... 20,000 * -- 115 Nabisco Holdings ................................ 67,000 * -- 386 Nalco Chemical Company .......................... 750,000 * -- 4,321 Nashville Electric Service ...................... 325,000 * -- 1,872 New Orleans Firefighters Pension/Relief Fund .... 252,000 * -- 1,452 New York Life Insurance and Annuity Corporation ................................... 1,250,000 * -- 7,202 New York Life Insurance Company ................. 11,250,000 1.71 -- 64,817 Nicholas Applegate Convertible Fund ............. 3,165,000 * -- 18,235 Nicholas Applegate Global Holdings Co. LP ....... 80,000 * -- 461 Nicholas Applegate Investment Grade Convertible ................................... 13,000 * -- 75 Norcal Mutual Insurance Company ................. 400,000 * -- 2,305 Occidental Petroleum ............................ 433,000 -- 2,495 OCM Convertible Trust ........................... 1,355,000 * -- 7,807 Ohio Bureau of Workers Compensation ............. 302,000 * -- 1,740 Oxford, Lord, Abbett & Co. ...................... 2,750,000 * -- 15,844 Pacific Life Insurance Company .................. 2,000,000 * -- 11,523 Pacific Specialty (Convertibles) ................ 850,000 * -- 4,897 Palladin Securities ............................. 1,050,000 * -- 6,050 Parker/Key Convertible Securities Fund .......... 180,000 * -- 1,037 Parker-Hannifin Corporation ..................... 190,000 * -- 1,095 Partner Reinsurance Company Ltd. ................ 590,000 * -- 3,399 Penn Treaty Network American Insurance Company ............................. 460,000 * -- 2,650 PGEP III LLC .................................... 1,050,000 * -- 6,050 Physicians Life ................................. 791,000 * -- 4,557 Physicians' Reciprocal Insurers Account #7 .................................... 2,000,000 * -- 11,523 PIMCO Convertible Fund .......................... 5,900,000 * -- 33,993 5 AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ Port Authority of Allegheny County Retirement and Disability Allowance Plan for the Employees Represented by Local 85 of the Amalgamated Transit Union ..................... 2,520,000 * -- 14,519 Potlatch-First Trust Company of St. Paul ........ 300,000 * -- 1,728 PRIM Board ...................................... 6,050,000 * -- 34,857 ProMutual ....................................... 420,000 * -- 2,420 Putnam Asset Allocation Funds--Balanced Portfolio ..................................... 845,000 * -- 4,868 Putnam Asset Allocation Funds--Conservative Portfolio ..................................... 510,000 * -- 2,938 Putnam Convertible Income--Growth Trust ......... 7,396,000 1.12 -- 42,612 Putnam Convertible Opportunities and Income Trust ......................................... 280,000 * -- 1,613 Quattro Fund, LLC ............................... 1,500,000 * -- 8,642 Queens Health Plan .............................. 125,000 * -- 720 R(2) Investments, LDC ........................... 12,000,000 1.83 -- 69,138 Radian Guaranty, Inc. ........................... 2,500,000 * -- 14,404 Ramius Capital Group Holdings, Ltd. ............. 700,000 * -- 4,033 Raytheon Master Pension Trust ................... 876,000 * -- 5,047 RCG Lattitude Master Fund ....................... 800,000 * -- 4,609 Ret Pension Plan of the CA State Automob ........ 350,000 * -- 2,017 Rhapsody Fund LP. ............................... 14,600,000 2.22 -- 84,118 RJR Reynolds .................................... 220,000 * -- 1,268 Rockhaven Premier Dividend Fund ................. 930,000 * -- 5,358 Salomon Brothers Asset Management, Inc. ......... 1,650,000 * -- 9,506 Salomon Smith Barney Inc. ....................... 4,000,000 * -- 23,046 San Diego City Retirement ....................... 1,973,000 * -- 11,367 San Diego County Convertible .................... 4,250,000 * -- 24,486 Screen Actors Guild Pension Convertible ......... 1,072,000 * -- 6,176 Shell Pension Trust ............................. 831,000 * -- 4,788 Southern Farm Bureau Life Insurance ............. 3,350,000 * -- 19,301 SPT ............................................. 1,830,000 * -- 10,544 Standard Insurance Company ...................... 450,000 * -- 2,593 Starvest Combined Portfolio ..................... 2,475,000 * -- 14,260 Starvest Managed Portfolio ...................... 200,000 * -- 1,152 State Employees' Retirement Fund of the State of Delaware ............................. 1,495,000 * -- 8,613 State of Connecticut Combined Investment Funds .............................. 3,290,000 * -- 18,955 State of Maryland Retirement System ............. 5,923,000 * -- 34,125 State of Mississippi Health Care Trust Fund ..... 1,600,000 * -- 9,218 State of Oregon/SAIF Corporation ................ 14,750,000 2.24 -- 84,982 Teacher's Insurance and Annuity Association ..... 7,000,000 1.06 -- 40,331 The Class 1c Company ............................ 4,000,000 * -- 23,046 The Cockrell Foundation ......................... 125,000 * -- 720 The Dow Chemical Company Employees' Retirement Plan ............................... 4,550,000 * -- 26,215 6 AGGREGATE PRINCIPAL COMMON AMOUNT STOCK OF LYONS AT PERCENTAGE OWNED COMMON STOCK MATURITY THAT OF LYONS PRIOR TO REGISTERED NAME MAY BE SOLD OUTSTANDING CONVERSION HEREBY(1) ---- ------------- ----------- ---------- ------------ The Fondren Foundation .......................... 145,000 * -- 835 The Grable Foundation ........................... 216,000 * -- 1,244 Tribeca Investments LLC ......................... 12,000,000 1.83 -- 69,138 UBS AG, London Branch ........................... 11,000,000 1.67 -- 63,377 UBS O'Connor LLC f/b/o UBS Global Equity Arbitrage Master Limited ...................... 7,500,000 1.14 -- 43,211 UBS Warburg LLC ................................. 61,540,000 9.36 -- 354,563 Unifi, Inc. Profit Sharing Plan and Trust ....... 230,000 * -- 1,325 United Food and Commercial Workers Local 1262 and Employers Pension Fund ......... 1,140,000 * -- 6,568 University of Rochester ......................... 100,000 * -- 576 University of South Florida ..................... 550,000 * -- 3,169 University of South Florida Foundation .......... 80,000 * -- 461 Van Kampen Harbor Fund .......................... 13,700,000 2.08 2,635,165(6) 78,933 Van Waters & Rogers, Inc. Retirement Plan ....... 650,000 * -- 3,745 Vanguard Convertible Securities Fund, Inc. ...... 3,725,000 * -- 21,462 Victory Convertible Securities Fund ............. 580,000 * -- 3,342 Victory Invest Quality Bond Fund ................ 90,000 * -- 519 Wake Forest University .......................... 1,867,000 * -- 10,757 Writers Guild Convertible ....................... 626,000 * -- 3,607 Wyoming State Treasurer ......................... 2,153,000 * -- 12,405 -------------------------- * Less than one percent. (1) Assumes conversion of all of the Holder's LYONs at a conversion rate of 5.7615 shares of common stock per $1,000 principal amount at maturity of the LYONs. However, this conversion rate will be subject to adjustment as described under "Description of the LYONs - Conversion Rights." As a result, the amount of common stock issuable upon conversion of the LYONs may increase or decrease in the future. (2) The Allstate Corporation ("Allstate") directly and through its subsidiaries currently owns 29,600 shares of Company common stock. The Agents Pension Plan (the "Pension Plan") currently owns 1,400 shares of Company common stock. The Pension Plan is a qualified ERISA plan that is maintained for the benefit of certain agents of Allstate Insurance Company ("AIC"), a subsidiary of Allstate. The Trustee for the Pension Plan holds title to all Pension Plan investments. Allstate disclaims any interest in securities held in the pension plan trust, although the Investment Committee of the Pension Plan consists of AIC officers. In the course of managing their investment portfolios, AIC and its affiliates may acquire and hold investments that exceed 10% of a class of equity securities of an issuer. The Public Equity Group of the Investment Department of AIC, which has the responsibility for the securities described herein, is not aware of any positions, offices or other material relationships involving AIC or its subsidiaries which are required to be disclosed. However, no independent investigation has been made as to whether there are or may have been any such transactions as a result of insurance activities, investment activities or other groups or divisions or actions with respect to or by such investing companies. (3) This entity is either an investment company or a portfolio of an investment company registered under Section 8 of the Investment Company Act of 1940, as amended, or a private investment account advised by Fidelity Management & Research Company ("FMR Co."). FMR Co. is a Massachusetts corporation and an investment advisor registered under Section 203 of the Investment Advisers Act of 1940, as amended, and provides investment advisory services to each of such Fidelity entities identified above, and to other 7 registered investment companies and to certain other funds which are generally offered to a limited group of investors. FMR Co. is a wholly-owned subsidiary of FMR Corp. ("FMR"), a Massachusetts corporation. The holdings indicated are as of December 13, 2000. (4) Shares indicated as owned by such entity are owned directly by various private investment accounts, primarily employee benefit plans for which Fidelity Trust Management Trust Company ("FMTC") serves as trustee or managing agent. FMTC is a wholly-owned subsidiary of FMR and a bank as defined in Section 3(a)(6) of the Securities Exchange Act of 1934, as amended. The holdings indicated are as of December 13, 2000. (5) Merrill Lynch, Pierce, Fenner & Smith, Inc. was the Initial Purchaser in a private placement of the LYONs by the Company on November 1, 2000. Merrill Lynch, Pierce, Fenner & Smith, Inc. is not aware of any position, office or directorship relationship with the Company or its affiliates. However, it may or may not have, from time to time, acted in a financial investment advisory capacity to the Company. (6) Van Kampen Asset Management, Inc. is the investment advisor to the Van Kampen Harbor Fund and has discretionary authority over its portfolio. Van Kampen Asset Management, Inc. is also the investment advisor to a number of other funds. Those funds hold an aggregate amount of 2,635,165 shares of common stock of the Company. The preceding table has been prepared based upon information furnished to us by the Selling Securityholders in the table. From time to time, additional information concerning ownership of the LYONs and common stock may rest with certain Holders thereof not named in the preceding table, with whom we believe we have no affiliation. The Selling Securityholders listed in the above table may have sold or transferred, in transactions exempt form the registration requirements of the Securities Act, some or all of their LYONs since the date on which the information is presented in the above table. Information about the Selling Securityholders may change over time. Any changed information will be set forth in prospectus supplements. Because the Selling Securityholders may offer all or some of their LYONs or the underlying common stock from time to time, we can not estimate the amount of the LYONs or the underlying common stock that will be held by the Selling Securityholders upon the termination of any particular offering. See "Plan of Distribution." THE DATE OF THIS PROSPECTUS SUPPLEMENT IS JANUARY 31, 2002 8