Contacts and Alerts

Repligen Investor Relations Contact Information

Email: investors@repligen.com
781.419.1881

For questions about your shares, replacement of a lost stock certificate, or a change of address should be directed to Repligen's transfer agent:

Equiniti Trust Company
P.O Box 500
Newark, NJ 07101
800.937.5449
www.equiniti.com
helpast@equiniti.com

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