IR Contacts

Primary IR Contact
Kirk Richter
Treasurer
Email: kirk.richter@sial.com
Sigma-Aldrich Corporation
Phone: (314) 286-8004
Fax: (314) 286-7874

Transfer Agent
Registered Shareholder Contact Information
American Stock Transfer & Trust Company
Shareholder Services Department
6201 15th Street
Brooklyn, NY 11219
Toll Free: (800) 937-5449
Local & International: (718) 921-8124
Email: investors@amstock.com
Web site: http://www.amstock.com

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