On May 8, 2023, Marc Rosenbaum notified the Board of Directors of the Company of his decision to resign from his position as Vice President, Corporate Controller and Chief Accounting Officer. Mr. Rosenbaum indicated that he is leaving the Company to pursue another opportunity outside the spine industry and that his resignation is not the result of any dispute or disagreement with the Company, including any matters relating to the Company's accounting practices or financial reporting. The effective date of Mr. Rosenbaum's departure will be May 19, 2023.

Matthew Harbaugh, the Company's Executive Vice President and Chief Financial Officer, will assume the responsibilities of Chief Accounting Officer effective upon Mr. Rosenbaum's departure and will serve as the Company's principal financial officer and principal accounting officer for purposes of the rules and regulations of the U.S. Securities and Exchange Commission.