SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A7 (Amendment No. 7)* Under the Securities Exchange Act of 1934 LIGAND PHARMACEUTICALS INCORPORATED -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $0.001 par value -------------------------------------------------------------------------------- (Title of Class of Securities) 53220K 20 7 -------------------------------------------------------------------------------- (CUSIP Number) William F. Daniel Elan Corporation, plc Lincoln House Lincoln Place Dublin 2, Ireland (353) 1-709-4000 -------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) May 28, 2003 -------------------------------------------------------------------------------- (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box / /. NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See ss. 240.13d-7 for other parties to whom copies are to be sent. *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 disclosures provided in a prior cover page. The information required on 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). SCHEDULE 13D -------------------------------------------------------------------------------- CUSIP No. 53220K 20 7 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) Elan Corporation, plc I.R.S. Employer Identification No.: NA -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) / / (b) / / N/A -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS -------------------------------------------------------------------------------- WC -------------------------------------------------------------------------------- 5 CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) N/A -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Ireland ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF 5,835,771 SHARES ___________________________________________________ BENEFICIALLY 8 SHARED VOTING POWER OWNED BY EACH None REPORTING ___________________________________________________ PERSON WITH 9 SOLE DISPOSITIVE POWER 5,835,771 ___________________________________________________ 10 SHARED DISPOSITIVE POWER None ________________________________________________________________________________ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,835,771 ________________________________________________________________________________ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / / ________________________________________________________________________________ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8.4% (based upon 69,267,262 shares of common stock of Ligand Pharmaceuticals Incorporated outstanding as of April 30, 2003) ________________________________________________________________________________ 14 TYPE OF REPORTING PERSON CO ________________________________________________________________________________ Item 1. Security and Issuer. This Amendment No. 7 amends the Schedule 13D filed with the Securities and Exchange Commission (the "Commission") on January 6, 1999, as amended by the Schedule 13D/A1 filed with the Commission on July 27, 1999, as amended by the Schedule 13D/A2 filed with the Commission on July 29, 1999, as amended by the Schedule 13D/A3 filed with the Commission on September 10, 1999, as amended by the Schedule 13D/A4 filed with the Commission on December 17, 1999, as amended by Schedule 13D/A5 filed with the Commission September 11, 2000, as amended by Schedule 13D/A6 filed with the Commission on March 22, 2002 (as so amended, this "Schedule 13D"), with respect to the Common Stock, $0.001 par value per share ("Common Stock"), of Ligand Pharmaceuticals Incorporated (the "Issuer"), a Delaware corporation, whose principal executive offices are located at 10275 Science Center Drive, San Diego, California 92121-1117. Item 5. Interest in Securities of the Issuer. Item 5 (a) of the Schedule 13D is restated in its entirety as follows: (a) Elan is the beneficial owner of 5,835,771 shares of Common Stock, or approximately 8.4% of the outstanding shares of Common Stock (based upon 69,267,262 shares of Common Stock outstanding as of April 30, 2003). To the best knowledge of Elan, no other person named in Item 2 of this Schedule 13D owns any shares of Common Stock. (c) Elan sold 6,400,000 shares of Common Stock on May 28, 2003 at a price of $11.40 per share in a transaction exempt from registration under the Securities Act of 1933 (the "Act") pursuant to Rule 144 promulgated under the Act and Elan sold 2,222,222 shares of Common Stock to the Issuer on November 12, 2002 at a price of $9.00 per share. Item 7. Items to be Filed as Exhibits. Exhibit 1* Securities Purchase Agreement, dated as of November 6, 1998, by and among Elan Corporation, plc ("Elan"), Elan International Services, Ltd. ("EIS") and Ligand Pharmaceuticals Incorporated (the "Issuer"). Exhibit 2* Development, License and Supply Agreement, dated as of November 9, 1998, by and between Elan and the Issuer. Exhibit 3* Letter Agreement, dated as of August 13, 1999, between Elan, EIS and the Issuer. Exhibit 4* Amendment to Development, License and Supply Agreement, dated as of August 20, 1999, between Elan and the Issuer. ---------- * Previously filed. Signature The undersigned certifies that, after reasonable inquiry and to the best of its knowledge and belief, the information set forth in this statement is true, complete and correct. June 17, 2003 ELAN CORPORATION, PLC By: /s/ William F. Daniel ------------------------------------------- Name: William F. Daniel Title: Executive Vice President and Company Secretary Exhibit Index Exhibit No. Exhibit ----------- ------- 1* Securities Purchase Agreement, dated as of November 6, 1998, by and among Elan Corporation, plc ("Elan"), Elan International Services, Ltd. ("EIS") and Ligand Pharmaceuticals Incorporated (the "Issuer"). 2* Development, License and Supply Agreement, dated as of November 9, 1998, by and between Elan and the Issuer. 3* Letter Agreement, dated as of August 13, 1999, between Elan, EIS and the Issuer. 4* Amendment to Development, License and Supply Agreement, dated as of August 20, 1999, between Elan and the Issuer. ---------- * Previously filed.