3D SYSTEMS CORP

Evaluation of Disclosure Controls and Procedures

As of September 30, 2026, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) pursuant to Rules 13a-15 and 15d-15 under the Exchange Act. Based on this evaluation, management has concluded that our disclosure controls and procedures were not effective as of September 30, 2026 due to the material weaknesses discussed in our 2025 Annual Report on Form 10-K.

Changes in Internal Control Over Financial Reporting

We are in the process of implementing certain changes to our internal controls to remediate the material weaknesses described in our 2025 Annual Report on Form 10-K. Management has developed and is implementing a remediation plan designed to address the control deficiencies underlying the material weaknesses. This plan includes, but is not limited to, increased training, enhanced documentation associated with accounting treatment for non-routine items, and automation efforts designed to specifically address the identified material weaknesses. Aside from these activities, the results of which continue to be evaluated, there were no changes in the Company’s internal control over financial reporting during the three months ended September 30, 2026 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.