Momentus Inc.

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures (“Disclosure Controls”) as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act that are designed to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms, and that such information is accumulated and communicated to management, including the Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), as appropriate to allow timely decisions regarding required disclosure.

In designing and evaluating the Disclosure Controls, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives and management was required to apply judgment in evaluating its controls and procedures. All internal control systems, no matter how well designed, have inherent limitations, including the possibility of human error and the circumvention of overriding controls.

In connection with the preparation of this report, our management, under the supervision and with the participation of our CEO and CFO, conducted an evaluation of the effectiveness of the design and operation of our Disclosure Controls as of June 30, 2025. Based on this evaluation, the CEO and CFO concluded that the Company’s Disclosure Controls were not effective as of June 30, 2025, due to the material weakness in internal control over financial reporting described below.

Our management, including our CEO and CFO, has concluded that, notwithstanding the identified material weakness in our internal control over financial reporting, the condensed consolidated interim financial statements included in this Quarterly Report on Form 10-Q fairly present, in all material respects, our financial condition, results of operations and cash flows for the periods presented in conformity with GAAP.

Previously Identified Material Weakness

During the preparation of the Company’s financial statements for the year ended December 31, 2024, management identified a material weakness related to misclassification errors in our accounting for certain matters including the following:

•misclassifying $0.2 million of other income activity as revenue, where a transaction outside the scope of ASC Topic 606 was incorrectly presented in revenue rather than other income;

•misclassifying $0.1 million in legal expenses that were costs associated with an offering of common stock and warrants as legal costs instead of recording them as a reduction to additional paid-in capital in accordance with applicable guidance;

•a misclassifying $1.7 million related to the Company’s prepaid research and development expense balance. Based on the nature of the underlying items, which included both deposits for undelivered goods and components received intended for use in commercial launch services, the balance did not meet the criteria for prepaid research and development expense under ASC Topic 730. The Company has subsequently recorded and reclassified the balance from current assets to other non-current assets, ensuring proper classification in accordance with U.S. GAAP; and

•misclassifying $0.3 million of accounts payable as accrued liabilities.

There were no material misstatements as a result of this material weakness; however, it could have resulted in a material misstatement to the annual or interim consolidated financial statements that would not have been prevented or detected on a timely basis.

Management’s Plan to Remediate the Material Weakness

Management is implementing remediation steps to address the material weakness and to improve our internal control environment. Company Management prepared a plan with specific steps and milestones. This plan was briefed to the Disclosure Committee and Audit Committee, and then to the full Board of Directors. The Company will engage with outside consultants to review the revised control processes and procedures and assist with implementation as necessary. The Company’s progress in implementation is being reviewed regularly by Management, and the Disclosure and Audit Committees of the Board of Directors.

No assurance can be made that our remediation efforts will be completed in a timely manner or that the updated controls and procedures associated with such efforts will be deemed adequate after being subjected to testing. If not remediated, this material weakness could result in material misstatements to our annual or interim consolidated financial statements that may not be prevented or detected on a timely basis or result in a delayed filing of required periodic reports. If we are unable to assert that our internal control over financial reporting is effective, investors may lose confidence in the accuracy and completeness of our financial reports, the market price of our common stock could be adversely affected, and we could become subject to litigation or investigations by Nasdaq, the SEC, or other regulatory authorities, which could require additional financial and management resources.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the fiscal quarter ended June 30, 2025 which were identified in connection with management’s evaluation required by paragraph (d) of Rules 13a-15 and 15d-15 under the Exchange Act that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.