Appointments strengthen company’s capabilities across drug discovery, development and manufacturing WALTHAM, Mass. – Dyne Therapeutics, a biotechnology company pioneering targeted therapies for patients with serious muscle diseases, today announced the addition of three key members to its leadership team: Oxana Beskrovnaya, Ph.D., senior vice president and head of research; Chris Mix, M.D., senior vice president, clinical development; and John Najim, vice president, chemistry, manufacturing and controls (CMC). “Dyne is establishing a leadership position in muscle disease therapeutics by combining transformative science with an organizational passion for changing the lives of patients,” said Joshua Brumm, president and chief executive officer of Dyne. “We are thrilled to welcome Oxana, Chris and John to our growing team. Leveraging their collective experience in the discovery and development of novel medicines, we are poised to rapidly advance our programs toward the clinic and are fully focused on execution.” Dr. Beskrovnaya is an accomplished R&D leader with a strong track record of discovering and developing first-in-class therapeutics for rare genetic diseases. Prior to joining Dyne, she served as head of musculoskeletal and renal research in Sanofi’s rare disease and neurological unit, where she advanced a pipeline of drug candidates using multiple therapeutic modalities, including nucleic acids, proteins and small molecules. Dr. Beskrovnaya is the author of numerous patents, invited reviews, editorials, book chapters and original research articles in major scientific journals. She received her Ph.D. in genetics from Moscow Genetics Institute, followed by postdoctoral fellowship training in neuromuscular diseases at the Howard Hughes Medical Institute at the University of Iowa. Dr. Mix brings extensive clinical development experience to Dyne, most recently serving as vice president of rare genetic disease clinical development at Agios Pharmaceuticals, where he oversaw development across several hemolytic anemia indications. In his previous role as vice president of clinical development at Sarepta Therapeutics, he focused on advancing candidate therapies for rare neuromuscular disease. Dr. Mix received his B.A. in chemistry from Haverford College and his M.D. from the University of Massachusetts Medical School. He completed his residency in internal medicine at Tufts Medical Center, a fellowship in nephrology at the Beth Israel Deaconess Medical Center in Boston and an M.S. in clinical care research at the Tufts School of Biomedical Sciences. Mr. Najim brings a wealth of CMC biopharmaceutical development and cGMP manufacturing experience across multiple biologic expression systems and small molecules. Mr. Najim previously held roles of increasing responsibility at Proteon Therapeutics, including most recently as vice president of manufacturing and process development, and also served as associate director of manufacturing at Dyax Corporation. He received his B.S. in biochemistry from Merrimack College and his MBA from Bentley University. About Dyne Therapeutics Dyne Therapeutics is pioneering life-transforming therapies for patients with serious muscle diseases. The company’s FORCE™ platform delivers oligonucleotides and other molecules to skeletal, cardiac and smooth muscle with unprecedented precision to restore muscle health. Dyne is advancing treatments for myotonic dystrophy type 1 (DM1), Duchenne muscular dystrophy (DMD) and facioscapulohumeral muscular dystrophy (FSHD). Dyne was founded by Atlas Venture and is headquartered in Waltham, Mass. For more information, please visit www.dyne-tx.com, and follow us on Twitter and LinkedIn.   Media Contact Ten Bridge Communications Max Stendahl, 508-277-8117 max@tenbridgecommunications.com