Tokyo, Japan – June 23, 2004 - Trend Micro (TSE: 4704; Nasdaq: TMIC), a worldwide leader in network antivirus and Internet content security, today announced the results of share buyback pursuant to Sub-section 2 of Section 1 of Article 211-3 of the Japanese Commercial Code. The share buyback program was approved pursuant to a resolution of a meeting of the Board of Directors held on May 19, 2004.

1. Repurchase period: May 20, 2004 through June 23, 2004
2. Number of shares repurchased: 375,000 shares
3. Aggregate cost of shares repurchased: 1,466,195,000 yen

<Note>

1. At the meeting of the Board of Directors held on May 19, 2004, the following was resolved:

Number of shares to be repurchased: Maximum of 1,000,000 shares
Aggregate cost: Maximum of 4,000,000,000 yen

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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