December 14, 2005

Tokyo, Japan – December 14, 2005 - Trend Micro (TSE: 4704; Nasdaq: TMIC),
a leader in network antivirus and Internet content security software and
services, today announced the final terms of Stock Acquisition Rights
to be issued as stock options.

Amount to be paid upon exercise of Stock Acquisition Rights:
3,950yen per share

Aggregate amount of issue price of shares to be issued
upon exercise of Stock Acquisition Rights:
9,875,000,000yen

Amount to be accounted for as stated capital in case shares are issued
upon exercise of Stock Acquisition Rights:
1,975yen per share

Notes:

• Issue date of Stock Acquisition Rights: December 14, 2005
• Number of shares to be issued or transferred upon exercise of Stock Acquisition Rights: 2,500,000
  (The number of shares to be issued or transferred upon exercise of each Stock Acquisition Right is 500.)
• Exercise period of the stock acquisition rights:
  From December 14, 2006 to December 13, 2010

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.

Additional information about Trend Micro Incorporated and the products and services are available at Trend Micro.com This Trend Micro news release and other announcements are available at http://trendmicro.mediaroom.com/ and as part of an RSS feed at www.trendmicro.com/rss Or follow our news on Twitter at @TrendMicro.