UNITED STATES OF AMERICA SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN ISSUER PURSUANT TO RULE 13A-16 OR 15D-16 OF THE SECURITIES AND EXCHANGE ACT OF 1934 Includes the free translation of a material event sent by Sociedad Quimica y Minera de Chile S.A. to the Superintendencia de Valores y Seguros de Chile on November 21, 2003. SOCIEDAD QUIMICA Y MINERA DE CHILE S.A. --------------------------------------- (Exact name of registrant as specified in its charter) CHEMICAL AND MINING COMPANY OF CHILE INC. ----------------------------------------- (Translation of registrant's name into English) El Trovador 4285, Santiago, Chile (562) 425-2000 ------------------------------------------------ (Address and phone number of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover of 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 ----- ----- If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82___________ SQM SOCIEDAD QUIMICA Y MINERA DE CHILE S.A. Santiago, November 21, 2003 Mr. Alejandro Ferreiro Y. Superintendent Securities and Insurance Superintendence Avda. Libertador Bernardo O'Higgins 1449 Santiago - -------- Essential Issue --------------- Dear Mr. Superintendent. We hereby inform you that Sociedad Quimica y Minera de Chile S.A. (SQM) and its affiliate, SQM Nitratos S.A., on one side, and Inversiones PCS Chile Limitada and 628550 Saskatchewan Ltd. -both companies affiliates of Potash Corporation of Saskatchewan Inc., an important shareholder at SQM-, on the other side, subscribed on November 20, 2003, a Promise Agreement pursuant to which the formers will acquire from the latter all of the shares of PCS Yumbes S.C.M. We inform you the above to update what was exposed in our previous letters sent to you on August 27 and October 24, 2003 and as an essential issue in compliance with articles 9 and 10 of Law Number 18.045, and article 44 of Law Number 18.046. Additionally, also in compliance with the indications set forth in the Rule of General Character Number 30 that was issued on November 10, 1989. We remain at your disposal to clarify any additional aspects that you may deem relevant in relation to the above. Yours truly, Sociedad Quimica y Minera de Chile S.A. Conf: /s/ Patricio Contesse G. ------------------------- Patricio Contesse G. Chief Executive Officer Cc: Santiago Stock Exchange Brokers Stock Exchange Electronic Stock Exchange New York Stock Exchange Securities and Exchange Commission The Bank of New York SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. SOCIEDAD QUIMICA Y MINERA DE CHILE S.A. Conf: /s/ Ricardo Ramos R. -------------------------- Ricardo Ramos R. Chief Financial Officer Date: November 21, 2003