Carlsmed, Inc.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On September 4, 2026, the Board of Directors of Carlsmed, Inc. (the “Company”) appointed Jeffrey Bertolini as Chief Operating Officer of the Company, effective September 8, 2026. Mr. Bertolini, age 60, has served as the Company’s Senior Vice President, Operational Excellence since March 2025. Previously, Mr. Bertolini was Vice President of Advanced Manufacturing Technologies of the Company from September 2024 to March 2025. Before joining the Company, Mr. Bertolini was Senior Vice President, Operations & Technology of SI-BONE, Inc. from July 2022 to October 2024 and Vice President, Global Planning and Field Ops of NuVasive, Inc. from April 2020 to June 2022. He holds an MBA from Rensselaer Polytechnic Institute and a Bachelor of Science in Procurement and Logistics Management from Arizona State University. The Company previously entered into an employment agreement with Mr. Bertolini, effective as of July 10, 2025 (the “Employment Agreement”). The Employment Agreement provides for an initial annual base salary of $375,000 and the eligibility to earn an annual cash incentive award with a target incentive opportunity equal to 40% of his base salary. Mr. Bertolini’s salary was increased to $440,000 per annum on March 9, 2026. Pursuant to the Employment Agreement, if Mr. Bertolini’s employment is terminated by us without “cause” or due to his resignation for “good reason” outside the period beginning three months before and ending 12 months after the consummation of a “corporate transaction,” then, subject to a release of claims in favor of the Company, Mr. Bertolini will receive (i) continuing payments of base salary for 12 months, (ii) any earned but unpaid annual incentive award for the year prior to the year of termination, (iii) a pro-rated annual incentive award for the year of termination based on achievement of performance targets, and (iv) COBRA reimbursements for up to 12 months. In connection with Mr. Bertolini’s appointment as Chief Operating Officer, his salary was increased to $475,000 per annum, effective as of September 8, 2026 and his target incentive opportunity was increased to 60% of his base salary. On September 8, 2026, Mr. Bertolini was also granted 50,000 stock options to purchase shares of the Company’s common stock. In connection with Mr. Bertolini’s appointment as Chief Operating Officer, Mr. Bertolini and the Company have entered into an indemnification agreement substantially similar to the indemnification agreement that the Company’s directors and other executive officers have entered into, the form of which is on file with the U.S. Securities and Exchange Commission. No family relationships exist between Mr. Bertolini and any of the Company’s directors or executive officers or any person nominated or chosen by the Company to become a director or executive officer. Other than with respect to the compensation matters, as described above, there are no arrangements or understandings between Mr. Bertolini and any other person pursuant to which Mr. Bertolini was selected as Chief Operating Officer of the Company, nor are there any transactions to which the Company is or was a participant and in which Mr. Bertolini has or had a direct or indirect material interest subject to disclosure under Item 404(a) of Regulation S-K.

Item 7.01. Regulation FD Disclosure. On September 8, 2026, the Company issued a press release announcing the appointment of Mr. Bertolini as Chief Operating Officer. The text of the press release is attached as Exhibit 99.1 to this Form 8-K. The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.