UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16a or 15d-16 OF THE SECURITIES EXCHANGE ACT OF 1934 For the Month of April, 2002 ALTAREX CORP. (Exact name of Registrant as specified in its charter) 610 LINCOLN STREET WALTHAM, MA, USA 02451 (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. Form 20-F X Form 40-F ----- ---- Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes No X ---- ---- On April 26, 2002, AltaRex Corp. (the "Company") announced that ICN Pharmaceuticals, Inc. has brought suit against the Company in the Superior Court of Orange County in California. The full text of the press release issued in connection with the announcement is filed as Exhibit 99.1 to this report on Form 6-K and is incorporated herein by reference. INDEX TO EXHIBITS EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1 Press Release Regarding Suit by ICN Pharmaceuticals, Inc., dated April 26, 2002. Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. ALTAREX CORP. By: /s/ Edward M. Fitzgerald ------------------------------ Name: Edward M. Fitzgerald Title: Senior Vice President and Chief Financial Officer Date: April 29, 2002 - 2 -