Agenus to Report First Quarter 2013 Financial Results on April 24, 2013; Conference Call to Follow

Agenus to Report First Quarter 2013 Financial Results on April 24, 2013;
Conference Call to Follow

LEXINGTON, Mass., April 18, 2013 (GLOBE NEWSWIRE) -- Agenus Inc. (Nasdaq:AGEN)
will release its first quarter 2013 financial results before the market opens
on April 24, 2013.

Agenus executives will host a conference call at 11:00 a.m. Eastern Time that
same day. To access the live call, dial 647-426-1845; the access code is
R128039. The call will also be webcast and will be accessible at
www.agenusbio.com/webcast/. A replay will be available approximately two hours
after the call through midnight Eastern Time on June 21, 2013. The replay
number is 416-915-1035 and the access code is 735470. The replay will also be
available on the company's website approximately twenty four hours after the
live call.

Agenus Inc. is a biotechnology company working to develop treatments for
cancers and infectious diseases. The company is focused on immunotherapeutic
products based on strong platform technologies with multiple product
candidates advancing through the clinic, including several product candidates
that have advanced into late-stage clinical trials through corporate partners.
Between Agenus and its partners, 19 programs are in clinical development. For
more information, please visit www.agenusbio.com.

CONTACT: Media and Investor Contact:
         Jonae R. Barnes
         Vice President
         Investor Relations and
         Corporate Communications
         jonae.barnes@agenusbio.com
         617-818-2985

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