• • Co-founder and CSO Dr. Justin Hanes to deliver keynote presentation

• President & CEO Michael O’Rourke to speak on panel

BALTIMORE (March 17, 2015) – GrayBug Inc., a privately held pharmaceutical company developing drug delivery therapies and sustained-release compounds for the treatment of eye diseases, today announced that its co-founder and Chief Scientific Officer Dr. Justin Hanes will deliver the keynote presentation, titled “The Dawn of Nanotechnology in Ocular Therapeutics” at the 7^th Ocular Diseases Drug Discovery Conference at the Westin San Diego on Thursday, March 19 at 8:00 a.m. PT. Dr. Hanes is the Lewis J. Ort Endowed Professor and Director of the Johns Hopkins University School of Medicine’s Center for Nanomedicine at the Wilmer Eye Institute.

GrayBug President & CEO Michael O’Rourke will speak on a panel titled “Challenges of Sustained Release Drug Delivery in Ocular Therapeutics” on March 19 at 11:20 a.m. PT.

For more information on the 7^th Ocular Diseases Drug Discovery Conference, please visit: www.gtcbio.com/conferences/ocular-diseases-drug-discovery-overview.

About GrayBug

GrayBug is a Baltimore, Maryland-based privately held preclinical-stage pharmaceutical company focused on developing breakthrough products for serious ocular diseases. The company is developing a continuum of therapeutic products for major ocular disease indications utilizing proprietary micro- and nanoparticle controlled-release technologies. The broad platform has applicability for potential strategic partnerships. GrayBug’s technologies were co-developed by several of the founders, including Justin Hanes, Ph.D, Lewis J. Ort Professor of Ophthalmology at the Wilmer Eye Institute at the Johns Hopkins University School of Medicine, in collaboration with Dr. Peter J. McDonnell and Dr. Peter Campochiaro, leading ophthalmology clinician-scientists from the Wilmer Eye Institute.

The technologies were licensed from Johns Hopkins University. For more information, please visit www.graybug.com.

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