1934 Act Registration No. 1-14700 SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2004 Taiwan Semiconductor Manufacturing Company Ltd. (Translation of Registrant's Name Into English) No. 8, Li-Hsin Rd. 6, Hsinchu Science Park, Taiwan (Address 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, indicated below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82: .) -------- 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. Taiwan Semiconductor Manufacturing Company Ltd. Date: April 7, 2004 By /s/ Lora Ho ---------------------------------- Lora Ho Vice President & Chief Financial Officer TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LIMITED This is to report the amount of common shares bought back by TSMC from the Taiwan Stock Exchange from March 24 to April 6, 2004. ------------------------------------------------ ----------------- ----------------- ----------------- Date(s) 03/24/2004 - 03/31/2004 - 04/06/2004 03/29/2004 04/02/2004 ------------------------------------------------ ----------------- ----------------- ----------------- Number of common shares bought back 8,067,000 6,685,000 7,000,000 ------------------------------------------------ ----------------- ----------------- ----------------- Value of common shares bought back NT$477,168,533 NT$397,654,369 NT$434,271,246 ------------------------------------------------ ----------------- ----------------- ----------------- Average buyback price per share NT$59.15 NT$59.48 NT$62.04 ------------------------------------------------ ----------------- ----------------- ----------------- Accumulative number of shares bought back 8,067,000 14,752,000 21,752,000 ------------------------------------------------ ----------------- ----------------- ----------------- Percentage of accumulative shares bought back to total outstanding common shares 0.04% 0.07% 0.11% ------------------------------------------------ ----------------- ----------------- ----------------- Note: The Company is required by the ROC Securities and Futures Commission to make a public announcement whenever accumulative shares repurchased exceed NT$300,000,000 in value.