December 6, 2005

Tokyo, Japan –December 6, 2005 - Trend Micro (TSE: 4704; Nasdaq: TMIC), a leader in network antivirus and Internet content security software and services, today at a meeting of its Board aof Directors determined the details of stock acquisition rights to be issued as stock options (the "Stock Acquisition Rights) pursuant to Article 280-20 and 280-21 of the Commercial Code of Japan and the resolution at the 16th ordinary general meeting of shareholders on March 25, 2005.

1. Issue date of stock acquisition rights:
   December 14, 2005
2. Number of stock acquisition rights to be issued:
   5,000 (The number of shares to be issued upon exercise of each Stock Acquisition Right is 500)
3. Class of shares subject to the exercise of stock acquisition rights:
   Common shares of the Company
4. Issue price of stock acquisition rights:
   None
5. Amount to be paid upon exercise of stock acquisition rights (exercise price):
   To be decided on December 14, 2005
6. Aggregated amount to be issued or transferred upon exercise stock acquisition rights:
   To be decided on December 14, 2005
7. Exercise period of the stock acquisition rights:
   From December 14, 2006 to December 13, 2010
8. Amount to be accounted for as stated capital:
   The amount to be accounted for as stated capital shall mean an amount obtained by multiplying the exercise price (to be decided on December 14, 2005) by 0.5, with any fraction amounts to be rounded up to a full yen.
9. Individuals who will be allotted the stock acquisition rights:
   The directors, employees of and staff seconded to, the Company and its affiliates, a total of 1,614 persons

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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