3D SYSTEMS CORP

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we evaluated the effectiveness of our disclosure controls and procedures (as that term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of December 31, 2024, which is the end of the period covered by this Annual Report on Form 10-K. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures were not effective as of December 31, 2024 due to the material weaknesses described below.

Notwithstanding the existence of the material weaknesses described below, management believes that the consolidated financial statements included in this Annual Report on Form 10-K fairly present, in all material respects, our financial position, results of operations and cash flows as of and for the periods presented, in conformity with generally accepted accounting principles.

Management’s Report on Internal Control over Financial Reporting

Management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting (as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) and for performing an assessment of the effectiveness of internal control over financial reporting as of December 31, 2024.

Management of the Company assessed the effectiveness of our internal control over financial reporting as of December 31, 2024. Management based its assessment on criteria established in Internal Control–Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission ("2013 Framework"). Based on this assessment, management has concluded we did not maintain effective internal control over financial reporting due to the material weaknesses described below.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company’s annual or interim financial statements will not be prevented or detected on a timely basis.

We have identified the following material weaknesses, which exist or continue to exist as of December 31, 2024:

We did not maintain an effective control environment based on the criteria established in the 2013 Framework and identified deficiencies in the principles associated with the Control Environment component of the 2013 Framework that constitute material weaknesses, either individually or in the aggregate. We failed to maintain sufficient qualified resources with the appropriate level of knowledge, experience, and training necessary to support accounting and financial reporting processes and controls. This material weakness in the control environment contributed to the following control activities material weaknesses:

•We did not design and maintain adequate controls within the revenue process that resulted in material weaknesses, either individually or in aggregate. Contract terms, pricing, standalone selling price models, and determination of timing of revenue recognition were not adequately reviewed prior to entry in the Company’s information systems. In addition, we did not effectively implement an accounting system that appropriately captures the allocation of the transaction price to the performance obligations to support revenue accounting.

•We did not design and maintain adequate controls over certain assumptions used in the valuation of indefinite-lived intangible assets, goodwill and other long-lived assets related to an impairment charge, that resulted in material weaknesses, either individually or in aggregate.

•We did not design and maintain adequate controls within the financial close and reporting process that resulted in material weaknesses, either individually or in aggregate. We did not maintain comprehensive formal accounting policies. We also did not maintain controls over manual journal entries, balance sheet account reconciliations, and financial statement disclosures. In part due to an inadequate level of review, such reviews were not always performed on a consistent and timely basis.

•We did not design and maintain adequate controls over the accounting treatment for certain technical matters, including controls related to complex and/or non-routine transactions and arrangements, that resulted in material weaknesses, either individually or in aggregate.

Our independent registered public accounting firm, Deloitte & Touche LLP, who audited the Consolidated Financial Statements included in this Annual Report on Form 10-K issued an adverse opinion on the effectiveness of our internal control over financial reporting. Deloitte & Touche LLP's report is included herein.

Changes in Internal Control Over Financial Reporting

Other than described above, there were no changes in our internal control over financial reporting during the quarter ended December 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Plan for Remediation

We are committed to maintaining strong internal control over financial reporting. Management, with the oversight of the Audit Committee of the Board of Directors, is taking comprehensive actions to remediate the material weaknesses described above. Our remediation plan includes the following:

•We are enhancing the design of existing controls and implementing new controls related to revenue, the financial close and reporting process, complex or non-routine transactions, and valuation of indefinite-lived intangible assets, goodwill and other long-lived assets.

•We are updating documentation, expanding education and training, and ensuring that controls are prepared and reviewed at the appropriate level of precision.

•We designed and implemented manual controls to appropriately capture the allocation of transaction price to the performance obligations.

•We have hired and will continue to hire, accounting and finance personnel with the requisite skills and expertise to strengthen our technical accounting related to complex and/or non-routine transactions, revenue accounting, and financial close and reporting capabilities.

•We will continue to augment our internal resources by engaging external consultants with technical experience in accounting and financial reporting until we add sufficient in-house skills to our staff as mentioned above.

•We have enhanced senior leadership’s oversight and monitoring of the internal control environment and effectiveness of the Company’s ongoing remediation activities.

The material weaknesses will not be considered remediated until the new and redesigned controls operate for a sufficient period of time and management has concluded, through testing, that these controls are operating effectively. We believe the above measures will remediate the control deficiencies identified and strengthen our internal control over financial reporting. As we continue to evaluate and work to remediate the control deficiencies that gave rise to the material weaknesses, we may determine that additional measures or time are required to address the control deficiencies or that we need to modify or otherwise adjust the remediation measures described above. We will continue to assess the effectiveness of our remediation efforts in connection with our evaluation of our internal control over financial reporting.