its network operating system.[12] In 1996, the two companies agreed to a two-year continuation of the agreement in which Trend was allowed to globally market the ServerProtect product under its own brand alongside Intel's LANDesk brand.[citation needed] Trend Micro was listed on the Tokyo Stock Exchange in 1998 under the ticker 4704.[11] The company began trading on the United States–based NASDAQ stock exchange in July 1999.[13] 2000s In 2004, founding chief executive officer Steve Chang decided to split the responsibilities of CEO and chairman of the company.[11] Company co-founder Eva Chen succeeded Chang as chief executive officer of Trend Micro in January 2005.[8] Chen has been the company's chief technology officer since 1996 and before that executive vice president since the company's founding in October 1989.[8] Chang retained his position as company chairman.[8] In May, Trend Micro acquired US-based antispyware company InterMute for $15 million.[14] Trend Micro had fully integrated InterMute's SpySubtract antispyware program into its antispyware product offerings by the end of that yea