Opexa Therapeutics, Inc. (NASDAQ: OPXA), a biotechnology company developing Tcelna ® (imilecleucel-T), a novel T-cell immunotherapy for the treatment of multiple sclerosis (MS), today announced its addition to the Russell Microcap ® Index. Effective today, Opexa joins the index following an annual reconstitution of the 4,000 largest U.S. stocks as of the end of May. Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Russell calculates more than 700,000 benchmarks daily covering approximately 98 percent of the investable market globally, 80 countries and more than 10,000 securities. Approximately $5.2 trillion in assets are benchmarked to the Russell Indexes. “We are pleased to be joining the Russell Microcap Index and look forward to increased exposure to the investment community,” said Neil K. Warma, President and Chief Executive Officer of Opexa. “This listing provides an additional opportunity to generate interest in Opexa as we continue to make progress on our Abili-T clinical trial and leverage our T-cell immunotherapy platform.” Members of the Russell Microcap Index are automatically included in the appropriate growth and value style indexes. Russell determines membership for its equity indexes primarily by objective, market-capitalization rankings and style attributes. About Opexa Opexa’s mission is to lead the field of Precision Immunotherapy™ by aligning the interests of patients, employees and shareholders. The Company’s leading therapy candidate, Tcelna ®, is a personalized T-cell immunotherapy that is in a Phase IIb clinical development program (the Abili-T trial) for the treatment of Secondary Progressive MS. Tcelna is derived from T-cells isolated from a patient’s peripheral blood, expanded ex vivo, and reintroduced into the patient via subcutaneous injections. This process triggers a potent immune response against specific subsets of autoreactive T-cells known to attack myelin. About Multiple Sclerosis (MS) MS is a chronic, inflammatory condition of the central nervous system and is the most common, non-traumatic, disabling neurological disease in young adults. It is estimated that approximately two million people have MS worldwide.