Notice of Change in Affiliate Company

On May 10, 2005, our US subsidiary Trend Micro Incorporated (company representative: Lane Bess, main office location: 10101 North. De Anza Blvd, Cupertino, CA 95014 U.S.A.) entered into an agreement with shareholders of InterMute Inc., a US company ("InterMute”), to acquire shares of InterMute in the following manner:

1. Reason and method of change of Affiliate Company

Trend Micro Incorporated is to acquire all outstanding shares of InterMute for the purpose of capitalizing on advanced technologies InterMute owns in the anti-spyware product field.

2. Date of change of Affiliate Company

On May 10, 2005, a share acquisition agreement was entered into.

3. Outline of changing company

(1) Name: InterMute Inc.
(2) Representative: Ed English, CEO and Founder
(3) Location: 100 Grossman Drive, Braintree, MA 02184 U.S.A.
(4) Date of foundation: October 1999
(5) Line of business: Development of anti-spyware products
(6) Fiscal term: December 31
(7) Number of employees: 35
(8) Total assets and result of operation as of December 31, 2004

Total assets: US$2 million
Sales: US$ 4 million
Net profit: US$ 0.3 million

4. Name of the party from whom the shares were acquired, number and value of shares acquired

Trend Micro Incorporated acquires all shares issued (5,628,540 shares), which includes 1,500,000 shares from Ed English (CEO, Founder of InterMute Inc.).
Total acquisition amount is US$15 million.

5. Number of shares owned and share ownership before/after acquisition

Before acquisition: 0%(0 shares)
After acquisition: 100%(5,628,540 shares)

6. Effect of transaction

The effect of the transaction to our business results for the year ending December 31, 2005 is expected to be immaterial.


About Trend Micro:

Trend Micro Incorporated (TSE: 4704), a global cloud security leader, creates a world safe for exchanging digital information with its Internet content security and threat management solutions for businesses and consumers. A pioneer in server security with over 20 years' experience, we deliver top-ranked client, server and cloud-based security that fits our customers' and partners' needs, stops new threats faster, and protects data in physical, virtualized and cloud environments. Powered by the Trend Micro™ Smart Protection Network™ cloud security infrastructure, our industry-leading cloud-computing security technology, products and services stop threats where they emerge, on the Internet, and are supported by 1,000+ threat intelligence experts around the globe.

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