Chen founded Trend Micro with her brother-in-law, Steve Chang, and her sister, Jenny Chang, in 1988.

FORBES: Why Trend Micro Founder Eva Chen Is Not On The List Of Taiwan's 40 Richest

Today, Steve Chang remains chairman of Trend Micro and the biggest individual stockholder, with a 3.84% stake in the company.

FORBES: Why Trend Micro Founder Eva Chen Is Not On The List Of Taiwan's 40 Richest

After serving as executive vice president and chief technology officer, Chen took the position of CEO from Steve Chang in 2005.

FORBES: Why Trend Micro Founder Eva Chen Is Not On The List Of Taiwan's 40 Richest

While Steve Chang was the face of Trend Micro in its early years, his sister-in-law came to be his secret weapon.

FORBES: Asia's Women In the Mix: Eva Chen Battles the Hackers

As early as 2000 Steve Chang suggested Chen succeed him as CEO, as he sought to split that and his role as chairman.

FORBES: Asia's Women In the Mix: Eva Chen Battles the Hackers

Steve Chang is listed as top individual shareholder, with 3.9%, but the ownership stakes registered in Tokyo, where the company is listed, are as cloaked as the business it does.

FORBES: Asia's Women In the Mix: Eva Chen Battles the Hackers

When Steve and Jenny Chang semiretired from Trend Micro in 2005, it was well established in major corporate sectors like automotive and telecom, and with big government clients, including the Pentagon.

FORBES: Asia's Women In the Mix: Eva Chen Battles the Hackers