1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D. C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16a, 15d-16 OF THE SECURITIES EXCHANGE ACT OF 1934 For the Month of September, 2000 ALTAREX CORP. (Exact name of Registrant as specified in its charter) 303 WYMAN STREET SUITE 125 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 31, 2000 AltaRex Corp. (the "Company") announced that it has closed the over-allotment option to its previously announced private placement of Common Shares, resulting in gross proceeds of C$1.2 million and the issuance of 1,380,000 Common Shares. INDEX TO EXHIBITS EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1 Press Release Regarding Private Placement of Common Shares, dated August 31, 2000. 2 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: September 7, 2000 - 2 -