On June 10, 2024, Michael A. Jacobsen informed the Board of Directors of Omeros Corporation (?Omeros? or the ?Company?) of his intention to retire from his positions as the Company?s Chief Accounting Officer and Treasurer, effective June 30, 2024. To facilitate an effective transition of his responsibilities and as part of a planned transition to retirement after 10 years with Omeros, Mr. Jacobsen will continue to serve as a part-time employee and senior finance advisor to the Company.

On June 10, 2024, the Company?s Board of Directors appointed David J. Borges as the Company?s Chief Accounting Officer and Treasurer, effective June 30, 2024 (the ?Effective Date?), and designated him as the Company?s principal financial officer and principal accounting officer as of the Effective Date. Mr. Borges, 60, joined Omeros in June 2020 as Senior Director, Financial Planning & Analysis and was promoted to Associate Vice President, Financial Planning &Analysis in April 2022. 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.