Press Release

NEEDHAM, Mass., May 22, 2013 (GLOBE NEWSWIRE) -- Celldex Therapeutics, Inc. (Nasdaq:CLDX) announced today that Anthony Marucci, President and Chief Executive Officer, will present a corporate overview at the Deutsche Bank 38^th Annual Healthcare Conference in Boston on May 29, 2013 at 4:10 p.m. ET and at the Jefferies 2013 Global Healthcare Conference on June 5, 2013 at 9:30 a.m. ET in New York City.

The live webcasts of the presentations will be available online on the "Events & Presentations" page of the "Investors & Media" section of the Celldex website. Replays of the presentations will be available for 30 days following each event.

About Celldex Therapeutics, Inc.

Celldex is developing targeted therapeutics to address devastating diseases for which available treatments are inadequate. Our pipeline is built from a proprietary portfolio of antibodies and immunomodulators used alone and in strategic combinations to create novel, disease-specific therapies that induce, enhance or suppress the body's immune response. Visit http://www.celldextherapeutics.com.

CONTACT: Sarah Cavanaugh

         Vice President of Investor Relations &

         Corp CommunicationsCelldex Therapeutics, Inc.

         (781) 433-3161

         scavanaugh@celldextherapeutics.com

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