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 August, 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 August 9, 2002, AltaRex Corp. (the "Company") announced that it had engaged Vitale, Caturano & Company as the Company's independent auditors, effective immediately. The Company's engagement of Vitale, Caturano & Company follows the resignation in June 2002 of Arthur Andersen LLP as the Company's independent auditors in connection with Arthur Andersen LLP's cessation of its audit practice in the United States. The full text of the press release issued in connection with the announcement of the engagement of Vitale, Caturano & Company is filed as Exhibit 99.1 to this report on Form 6-K and is incorporated herein by reference. Also incorporated herein by reference is the notice of the change of auditors filed by the Company with Canadian securities authorities on July 30, 2002, the full text of which is filed as Exhibit 99.2 to this report on Form 6-K. INDEX TO EXHIBITS EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1 Press Release Regarding Change in Auditors, dated August 9, 2002. 99.2 Notice of Change of Auditors, as filed with Canadian securities authorities on July 30, 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/ Richard E. Bagley ------------------------------------- Omar Hussain Name: Richard E. Bagley Title: President and Chief Executive Officer Date: August 14, 2002 - 2 -