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 September 2005

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 þ		Form 40-F o

     (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 o		No þ

(If “Yes” is marked, indicated below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82:                     .)

 

 

Taiwan Semiconductor Manufacturing Company Limited
For the month of August 2005

This is to report 1) the changes in the shareholdings of our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares of Taiwan Semiconductor Manufacturing Company Ltd. (The Company; “TSMC”) (NYSE:TSM); 2) the pledge and clear of pledge of TSMC common shares by our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares of TSMC; 3) the acquisition of assets by TSMC and 4) the disposition of assets by TSMC for the month of August 2005.

1)

The changes in the shareholdings of our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares:

Number of

Number of

shares held as of

shares held as of

Title

Name

July 31, 2005

August 31, 2005

Changes

Chairman

Morris Chang

132,082,772

114,027,772

–18,055,000

Director & Supervisor

Koninklijke Philips Electronics N.V.

2,705,839,885

2,177,829,885

–528,010,000

Director & Supervisor

The Development Fund

1,802,512,466

1,597,057,466

–205,455,000

Vice Chairman

F. C. Tseng

43,977,891

39,647,891

–4,330,000

Director, President & CEO

Rick Tsai

26,823,795

26,606,795

–217,000

Senior Vice President

Kenneth Kin

3,874,860

3,854,860

–20,000

Senior Vice President

Stephen T. Tso

13,590,380

12,145,380

–1,445,000

Vice President

C. C. Wei

5,910,079

5,892,079

–18,000

Vice President

Mark Liu

10,557,792

10,477,792

–80,000

Vice President

J. B. Chen

7,513,645

7,078,645

–435,000

Vice President

Ping Yang

5,720,085

5,500,085

–220,000

Vice President

M. C. Tzeng

5,813,601

5,378,601

–435,000

Vice President & General Counsel

Richard Thurston

2,502,211

2,382,211

–120,000

Vice President

Wei Jen Lo

722,552

702,552

–20,000

Senior Director

L.C. Tu

8,233,827

8,231,827

–2,000

2)

The pledge and clear of pledge of TSMC common shares by our directors, supervisors, executive officers and shareholders who own more than 10% of total outstanding common shares: None.

3)

The acquisition of assets:

Description of assets		Purchase price
Machinery Equipment		NT$511,572,991
Facility and engineering equipment		NT$519,678,273
Corporate Notes and Asset Backed Securities		US$9,782,031

4)

The disposition of assets:

Description of assets		Sell price
Corporate Bonds		US$10,519,616
Bond Funds		NT$1,250,000,000

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.