Agenus to Report Fourth Quarter and Year End 2012 Financial Results on February 28, 2013; Conference Call to Follow

Thu Feb 21, 2013 7:00am EST

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LEXINGTON, Mass., Feb. 21, 2013 (GLOBE NEWSWIRE) -- Agenus Inc. (Nasdaq:AGEN) will release its
fourth quarter and year ended December 31, 2012 financial results before the market opens on
February 28, 2013.

Agenus executives will host a conference call at 11:00 a.m. Eastern Time that same day. To access
the live call, dial 877.475.3568 (domestic) or 678.809.3092 (international); the access code is
14310694. The call will also be webcast and will be accessible from the company's website at
www.agenusbio.com/webcast/
http://www.globenewswire.com/newsroom/ctr?d=10022479&l=2&a=www.agenusbio.com%2Fwebcast%2F&u=http%3A%2F%2Fwww.agenusbio.com%2Fwebcast%2F
. A replay will be available approximately two hours after the call through midnight Eastern Time
on April 25, 2013. The replay number is 855.859.2056 (domestic) or 404.537.3406 (international),
and the access code is 14310694. The replay will also be available on the company's website
approximately two 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
http://www.globenewswire.com/newsroom/ctr?d=10022479&l=3&a=www.agenusbio.com&u=http%3A%2F%2Fwww.agenusbio.com%2F
.

The Agenus logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=8187
http://www.globenewswire.com/newsroom/ctr?d=10022479&l=4&u=http%3A%2F%2Fwww.globenewswire.com%2Fnewsroom%2Fprs%2F%3Fpkgid%3D8187

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