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Gregory A. Demopulos, M.D., founded our company and has served as our president, chief executive officer and chairman of the board of directors since June 1994. He also served as our chief financial officer and treasurer from January 2009 to October 2013 in an interim capacity and as our chief medical officer from June 1994 to March 2010. Prior to founding Omeros, Dr. Demopulos completed his residency in orthopedic surgery at Stanford University and his fellowship training in hand and microvascular surgery at Duke University. In 2019, Dr. Demopulos was a recipient of the Prix Galien Canada Research Award. Dr. Demopulos currently serves on the board of trustees of the Smead Funds Trust, an open-end mutual fund company registered under the Investment Company Act of 1940. Dr. Demopulos received his M.D. from Stanford University School of Medicine and his B.S. from Stanford University.

Peter B. Cancelmo, J.D. has served as our vice president, general counsel and secretary since June 2019. He joined Omeros as deputy general counsel in January 2019. Prior to joining Omeros, Mr. Cancelmo was a principal and shareholder at Garvey Schubert Barer, P.C., where he represented clients in the life sciences and other technology industries in mergers, acquisitions, strategic alliances, public and private securities offerings, and a range of other corporate, commercial and financial transactions. He served as chair of the firm's business practice group from 2016 until his departure in December 2018. Mr. Cancelmo previously practiced corporate and transactional law at Davies, Ward, Philips and Vineberg LLP, in New York, and Choate, Hall & Stewart LLP, in Boston. Mr. Cancelmo received his J.D. from Boston University and his B.A. from Saint Michael's College.

David J. Borges has served as our vice president, finance, chief accounting officer and treasurer since June 2024. He joined Omeros in June 2020 as senior director, financial planning & analysis and served as associate vice president, financial planning & analysis from April 2022 to June 2024. Prior to joining Omeros, Mr. Borges served as vice president, finance and administration, at Bulletproof 360, Inc., a health and wellness company, where he directed and managed all aspects of corporate finance, accounting, information technology, human resources, facilities, and legal from October 2014 until October 2019. From May 2009 to June 2014, Mr. Borges served as chief financial officer and vice president of Advanced Refreshment LLC, a producer of private label bottled water and water-based beverages. From July 2001 to May 2009, Mr. Borges served as finance and business integration director at Merck & Co., Inc. (Merck), a biopharmaceutical company, after Merck acquired Rosetta Inpharmatics, where Mr. Borges had been serving as director of finance & administration/controller since 1998. Mr. Borges is a certified public accountant and received his B.S. in Commerce in Accounting from Santa Clara University.

Rajiv Shah, M.D., has served on our board of directors since June 2015 and on our audit committee, our compensation committee and our scientific committee since December 2021, May 2022 and September 2019, respectively. Dr. Shah has served as the president of the Rockefeller Foundation since February 2017. From March 2015 to February 2017, Dr. Shah was the managing partner of Latitude Capital, an emerging markets private equity firm that he founded. Dr. Shah served as administrator of the United States Agency for International Development (USAID) from January 2010 to February 2015. Dr. Shah served as undersecretary and chief scientist at the U.S. Department of Agriculture from May 2009 to January 2010, during which time he created the National Institute for Food and Agriculture. Prior to working in government, Dr. Shah worked in senior roles at the Bill & Melinda Gates Foundation, leading the Foundation's efforts in global health, agriculture and financial services. Dr. Shah also serves on the boards of trustees of the Rockefeller Foundation and the National Geographic Society. He is a member of the Defense Policy Board. Dr. Shah serves on the boards of directors of several private biotechnology companies, including Altos Labs and Mobius Scientific. From March 2015 to June 2017, Dr. Shah served on the board of directors of Arcadia Biosciences, Inc., a publicly traded agricultural technology company. Dr. Shah earned his M.D. from the University of Pennsylvania Medical School, his M.S. in Health Economics at the Wharton School of Business and his B.S. in Economics from the University of Michigan.

Leroy E. Hood, M.D., Ph.D., has served on our board of directors since March 2001. He also has served on our nominating and governance committee since September 2009, on our compensation committee since July 2011 and on our scientific committee since September 2019. Dr. Hood is chief strategy officer and professor at the Institute for Systems Biology, a non-profit research institute dedicated to the study and application of systems biology. Dr. Hood co-founded the Institute for Systems Biology in 2000 and served as its first president through December 2017. Dr. Hood is the founding chief executive officer of Phenome Health, a non-profit organization dedicated to the development of phenomics as a tool for assessing and optimizing individual health. Previously, Dr. Hood served as senior vice president and chief science officer of Providence St. Joseph Health, a multi-state, not-for-profit health system, from 2016 to 2021. Dr. Hood was founder and chairman of the Department of Molecular Biotechnology at the University of Washington School of Medicine. Dr. Hood also co-founded Amgen, Inc., Applied Biosystems, Inc., Darwin Molecular Technologies, Inc., Rosetta Inpharmatics, Inc. and SyStemix, Inc. Dr. Hood is a member of the National Academy of Science, the National Academy of Engineering and the National Academy of Medicine and is the recipient of numerous national and international awards, including the National Medal of Science, the Lasker Award and the Kyoto Prize. Dr. Hood received his Ph.D. and B.S. from the California Institute of Technology and his M.D. from The Johns Hopkins School of Medicine.

Diana T. Perkinson, M.D., has served on our board of directors and as a member of our scientific committee since May 2023. She has also served on our nominating and governance committee since April 2024. Dr. Perkinson holds dual board certifications in nephrology and internal medicine. From 2009 to 2025, she practiced as a physician at MD2 International LLC, a premier concierge medicine network. From 1987 to 2009, Dr. Perkinson practiced nephrology and internal medicine at Minor & James Medical in Seattle. She previously served as a clinical assistant professor in the division of nephrology at the University of Washington, from 1987 until 2009, and as medical director, transplantation, at Swedish Hospital, from 1996 until 2007. Dr. Perkinson also served as a major in the United States Air Force and as director of the dialysis unit at Wilford Hall Medical Center at Lackland Air Force Base in San Antonio, Texas from 1984 until 1987. Dr. Perkinson received her M.D. from the University of Alabama and her B.S. from Birmingham Southern College. She completed her fellowship in nephrology at the University of Washington.

Thomas F. Bumol, Ph.D., has served on our board of directors since February 2019 and as chair of our scientific committee since September 2019. Dr. Bumol served as Executive Vice President of the Allen Institute for Immunology in Seattle, Washington, from March 2018 until August 2022. Dr. Bumol joined the Allen Institute following a 35-year career at Eli Lilly and Company. Dr. Bumol held various positions at Eli Lilly from 1982 until his retirement in December 2017. He was most recently the senior vice president of biotechnology and immunology research and the site head of Eli Lilly's Biotechnology Center in San Diego, California. While at Eli Lilly, Dr. Bumol's teams and collaborators advanced over 100 molecules into clinical development, including TRULICITY (dulaglutide), TALTZ (ixekizumab), EMGALITY (galcanezumab) and mirikizumab. Through strategic alliances, he and his teams also helped develop and support REOPRO (abciximab) with Centocor Inc. (n/k/a Janssen Pharmaceutical Cos.) as well as OLUMIANT (baricitinib) with Incyte Corporation. Dr. Bumol serves on the University of Michigan Technology Transfer National Advisory Board and as an advisor to Lilly Ventures. He is a member of the Board of Directors of Tentarix Biotherapeutics LP, a private biotechnology company, and serves as a scientific advisor to a number of biotechnology and immunology companies. Dr. Bumol earned his B.S. degree in microbiology from the University of Michigan and his Ph.D. in microbiology-immunology from the University of Minnesota. He completed postdoctoral studies through a fellowship in the Department of Molecular Immunology at Scripps Research in La Jolla, California.

Peter A. Demopulos, M.D., has served on our board of directors since January 1995 and on our scientific committee since September 2019. Dr. Demopulos is a practicing board-certified general and interventional cardiologist at Seattle Cardiology, part of the Swedish Heart & Vascular Institute. He has been a member of Seattle Cardiology since 2005, also serving as its Medical Director from 2005 to 2010. Dr. Demopulos is also a clinical assistant professor of cardiology at the University of Washington School of Medicine, a position that he has held since 1989. He is a Fellow of the American College of Cardiology and the Society for Cardiovascular Angiography and Interventions. He also participates as an investigator in clinical trials evaluating interventional cardiology devices and drug therapies as a member of Swedish Heart and Vascular Research. Dr. Demopulos received his M.D. from the Stanford University School of Medicine and his B.S. from Stanford University.

On August 12, 2026, the Board of Directors of Omeros Corporation appointed Joseph Schocken as a director, effective immediately. Mr. Schocken, is a private investor and the founder and president of Tranceka Capital, LLC. Mr. Schocken founded Seattle-based investment bank Broadmark Capital LLC in 1987. In 2010, Mr. Schocken co-founded and served as chief executive officer of the entities that became Broadmark Realty Capital, Inc. (NYSE) until its merger in 2019. He served as its post-merger chairman from 2019 through 2021. He currently serves as chairman of Taqtile, Inc., a digital work assistance platform. Mr. Schocken has long been involved in politics and economic policy on a national level. He is recognized as one of the driving forces behind the JOBS Act, has testified on economic policy before committees of the U.S. House and Senate, and was a Presidential appointee to the National Advisory Council on Innovation and Entrepreneurship. He received his MBA from Harvard University and his BA in history from the University of Washington.

Nadia Dac has served as our chief commercial officer since January 2021. Ms. Dac brings nearly three decades of international experience as a strategic commercial leader at large and small biopharmaceutical companies. Prior to joining Omeros, Ms. Dac served as the chief commercial officer at Alder Pharmaceuticals, Inc. (acquired in 2019 by Lundbeck) from April 2019 until June 2020 and as vice president of global specialty commercial development at AbbVie, Inc. from December 2014 to March 2019. She previously served as vice president of marketing at Auxilium Pharmaceuticals, Inc. from May 2013 to September 2014, when the company was acquired by Endo International plc. From 2009 to 2013, Ms. Dac held several roles of increasing responsibility at Novartis AG, including global vice president of neuroscience professional relations prior to her role as vice president of Novartis' multiple sclerosis franchise, and at Biogen Inc., Johnson & Johnson, and Eli Lilly and Company. She holds a B.S. in Marketing from Rutgers University.

Peter W. Williams has served as our vice president, human resources since June 2020. Prior to joining Omeros, Mr. Williams served as the senior vice president of human resources at Redbox Automated Retail, LLC from 2016 to 2019, where he led human resources and internal communications functions. From 2013 to 2016, Mr. Williams served as the vice president, HR operations at Outerwall Inc. (Coinstar) and before that he held human resources leadership roles at Coinstar from 2009 to 2013. Prior to 2009, Mr. Williams held human resources leadership roles at various technology and consumer focused companies, including Washington Mutual, Inc., Sterling Commerce, Inc., Expedia, Inc., and Verio, Inc. Mr. Williams received a B.A. in Business Administration and a B.A. in English from the University of Washington.

David W. Ghesquiere has served as our chief business development officer since August 2024. Prior to joining Omeros, Mr. Ghesquiere served as managing director of Adrenaline Venture & Advisory LLC, an international advisory firm, advising biotech and technology companies, which he founded in 2012. Mr. Ghesquiere served, from November 2013 to December 2023, as senior vice president, corporate & business development of NanoString Technologies, focusing on life science tools, informatics, and molecular diagnostics (acquired by Bruker Corporation). Mr. Ghesquiere served as senior vice president, corporate & business development at Dendreon Corporation, a biotechnology company, from 2011 to 2012. From 2005 until its acquisition by Astellas in 2010, Mr. Ghesquiere also held a variety of executive positions at OSI Pharmaceuticals, including senior vice-president of corporate & business development and managing director of OSI's corporate venture capital arm. Earlier in his career, Mr. Ghesquiere served in business development and alliance management roles at Aventis Pharmaceuticals (acquired by Sanofi) and worked in product marketing/new product planning at Johnson & Johnson. Mr. Ghesquiere received his M.B.A. from the University of Western Ontario's Ivey Business School and his B.A. in economics from the University of Western Ontario.

Andreas Grauer, M.D. has served as our chief medical officer since October 2023. Prior to joining Omeros, Dr. Grauer served as chief medical officer at Federation Bio from October 2021, where he led all clinical activities with a focus on hyperoxaluria and immuno-oncology. From March 2019 to August 2021, Dr. Grauer was chief medical officer of Corcept Therapeutics, Inc., leading its global development organization in the design and execution of clinical programs directed to oncology, neurology, endocrinology, and metabolism indications. From December 2007 to December 2018, Dr. Grauer held several roles of increasing responsibility at Amgen, most recently serving as vice president of global development, therapeutic area head, and co-chair of the franchise steering committee for bone, nephrology and inflammation. Earlier in his career, Dr. Grauer was at Proctor and Gamble Pharmaceuticals where he held roles as global executive medical director for bone and for new technology development. Dr. Grauer received his M.D. from the University of Heidelberg Medical School in Germany, where he also completed his clinical training in internal medicine and endocrinology. He did research in molecular and cellular endocrinology both there and during a post-doctoral fellowship at Baylor College of Medicine. He holds an active associate professorship of medicine at the University of Heidelberg Medical School.

Catherine A. Melfi, Ph.D. has served as our vice president, regulatory affairs and quality systems since October 2012 and has served as our chief regulatory officer since April 2016. Dr. Melfi previously served from January 1996 to September 2012 at Eli Lilly and Company, where she held technical and leadership roles of increasing scope and responsibility, including as senior director and scientific director in global health outcomes and regulatory affairs, respectively. Prior to joining Eli Lilly, Dr. Melfi held various faculty and research positions at Indiana University, including appointments in its Economics Department, in the School of Public and Environmental Affairs, and in the Indiana University School of Medicine. Dr. Melfi received her Ph.D. in Economics from the University of North Carolina - Chapel Hill and B.S. in Economics from John Carroll University.

Mariana N. Dimitrova, Ph.D., has served as our vice president chemistry, manufacturing, and controls (CMC) since October 2022. Prior to joining Omeros in this role, Dr. Dimitrova had 20 years of pharmaceutical experience with CMC leadership spanning formulation development, drug product and device development, drug delivery and Human Factors engineering, analytical sciences, process development, and clinical manufacturing. In her career, Dr. Dimitrova contributed to the development of a number of monoclonal antibodies, Fc-fusion proteins, PEG-proteins, bispecific molecules, cytokines, DNA, peptides, and small molecules at Amgen Inc., MedImmune (Astra Zeneca), Biogen, and Jazz Pharmaceuticals. Dr. Dimitrova contributed to the commercialization of nine patient-convenient drug/device combination products for the treatment of autoimmune, respiratory, neurodegenerative, hematology, and infectious diseases. Most recently, from May 2019 to September 2022, Dr. Dimitrova was vice president of product and device development at Akero Therapeutics, developing Fc-FGF21 fusion protein for treatment of NASH. Prior to her industry work, Dr. Dimitrova spent five years in academia, including at the National Heart, Lung, and Blood Institute at the National Institutes of Health and the National Institute of Advanced Industrial Science and Technology (AIST) in Japan. Dr. Dimitrova holds a Ph.D. in Biophysics and Biological Sciences from the Bulgarian Academy of Sciences and the AIST, and a M.S. in Chemistry from Kliment Ohridski University in Bulgaria.

George A. Gaitanaris, M.D., Ph.D. has served as our vice president, science since August 2006 and as our chief scientific officer since January 2012. From August 2003 until our acquisition of nura, inc., in August 2006, Dr. Gaitanaris served as the chief scientific officer of nura, a company that he co-founded, and that developed treatments for central nervous system disorders. From 2000 to 2003, Dr. Gaitanaris served as president and chief scientific officer of Primal, Inc., a biotechnology company that was acquired by nura in 2003. Prior to co-founding Primal, Dr. Gaitanaris served as staff scientist at the National Cancer Institute. Dr. Gaitanaris received his Ph.D. in cellular, molecular and biophysical studies and his M.Ph. and M.A. from Columbia University and his M.D. from the Aristotelian University of Greece.