| News Release Issued: Nov 11, 2019 (8:00am EST) 
 Agenus receives $10M from UroGen Pharma for rights to Zalifrelimab (CTLA-4) for intravesical treatment of urinary tract cancers
 
 - UroGen  receives rights to zalifrelimab to be used in its proprietary sustained  release formulation for
 
 patients with high-grade non-muscle invasive  bladder cancer       LEXINGTON, Mass., Nov. 11, 2019 / PRNewswire/  -- Agenus Inc. (NASDAQ: AGEN), an immuno-oncology (I-O) company with a  pipeline of immune checkpoint antibodies, adoptive cell therapies1 and cancer vaccines, announced today that it received $10M  upfront for a License Agreement with UroGen Pharma Ltd. Under the  agreement Agenus is providing access to zalifrelimab (AGEN1884,  anti-CTLA-4 antibody) for use with UroGen's sustained release technology  for intravesical delivery in patients with urinary tract cancers.   Agenus is conducting clinical trials for zalifrelimab in combination  with Agenus' anti-PD-1 antibody balstilimab (AGEN2034) for a planned BLA  filing in cervical cancer. In addition, zalifrelimab is being evaluated  as a monotherapy in PD-1 refractory patients.
 
 Under the terms of the agreement, in addition to the $10 million upfront payment, Agenus is eligible to receive up to $200M in potential development, regulatory and commercial milestones, as well as 14-20% royalties on net sales.
 
 "In our ongoing clinical trials,  zalifrelimab and the combination of zalifrelimab plus balstilimab  (AGEN2034, anti-PD-1 antibody) have delivered durable as well as  curative responses in patients across a broad range of tumors.  Agenus  is developing the combination in multiple solid tumors with a first  planned BLA filing in 2020," said Garo H. Armen, Ph.D., Chairman and CEO  of Agenus. "We are enthusiastic to expand the benefit of zalifrelimab  through intravesical delivery to patients with urinary tract cancer in  this exciting collaboration with UroGen."
 
 
  
 About Agenus
 
 Agenus is a clinical-stage  immuno-oncology company focused on the discovery and development of  therapies that engage the body's immune system to fight cancer. The  Company's vision is to expand the patient populations benefiting from  cancer immunotherapy with combination approaches that leverage a broad  repertoire of antibody therapeutics, adoptive cell therapies (through  its AgenTus Therapeutics subsidiary) and its proprietary cancer vaccine  platforms. Agenus has a suite of antibody discovery platforms and a  state-of-the-art GMP manufacturing facility with the capacity to support  early phase clinical programs. Agenus is headquartered in Lexington, MA. For more information, please visit  www.agenusbio.com  and our twitter handle @agenus_bio. Information that may be important  to investors will be routinely posted on our website and twitter.
 
 Forward-Looking Statements
 
 This press release contains  forward-looking statements that are made pursuant to the safe harbor  provisions of the federal securities laws, including statements  regarding Agenus' clinical development and regulatory plans and  timelines and the anticipated benefits of the UroGen collaboration.   These forward-looking statements are subject to risks and uncertainties  that could cause actual results to differ materially. These risks and  uncertainties include, among others, the factors described under the  Risk Factors section of our most recent Quarterly Report on Form 10-Q or  Annual Report on Form 10-K filed with the Securities and Exchange  Commission. Agenus cautions investors not to place considerable reliance  on the forward-looking statements contained in this release. These  statements speak only as of the date of this press release, and Agenus  undertakes no obligation to update or revise the statements, other than  to the extent required by law. All forward-looking statements are  expressly qualified in their entirety by this cautionary statement.
 
 Contact:
 Agenus Inc.
 Jennifer Buell, PhD
 781-674-4420
 Jennifer.Buell@agenusbio.com
 
 1Through AgenTus Therapeutics, a subsidiary of Agenus
 
 SOURCE  Agenus Inc.
 
 To view this release online and get more information about Agenus Bio InvestorRoom visit: investor.agenusbio.com
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