Exhibit 99 MONSANTO COMPANY 800 NORTH LINDBERGH BLVD ST. LOUIS, MISSOURI 63167 RELEASE Immediately CONTACT Lori Fisher (314)-694-8535) MONSANTO'S BOARD OF DIRECTORS ACCEPTS HENDRIK A. VERFAILLIE'S RESIGNATION AS CHIEF EXECUTIVE OFFICER ST. LOUIS (Dec. 18, 2002) - Monsanto Company Chief Executive Officer Hendrik A. Verfaillie has submitted his resignation, as CEO, president and director of the board, effective immediately. Monsanto's Board of Directors has accepted Verfaillie's resignation Chairman Frank V. AtLee III announced today. AtLee will continue as chairman of the board and will serve as interim CEO while an external search is conducted. Verfaillie has been with Monsanto for 26 years. He led the company through the merger with Pharmacia & Upjohn, a subsequent initial public offering, and the complete spinoff from Pharmacia Corporation, which took place earlier this year. Monsanto Company (NYSE: MON) is a leading global provider of technology-based solutions and agricultural products that improve farm productivity and food quality. -oOo-