Except as noted below, there have been no material changes to the legal proceedings disclosed in the Company’s Annual Report on Form 10-K filed with the SEC on March 31, 2026. The Company continues to monitor the status of those proceedings, and developments will be disclosed in future filings as necessary.

On March 5, 2026, Lev Khasis filed a verified complaint against the Company in Delaware Court of Chancery (Case No. 2026-0179-DG) seeking indemnification and advancement expenses from the Company in connection with the NSA and investigation by the SEC. Legal counsel to Khasis indicated that total expenses for which Mr. Khasis seeks indemnification is approximately $1.2 million plus legal expenses in connection with this suit. On April 6, 2026, the Company and Mr. Khasis entered into a confidential settlement and release agreement settling the claim for $0.4 million and the suit was dismissed with prejudice.

ANV Global Services Inc. (“ANV”), the insurer who issued a Side-A directors and officers liability insurance policy that provides coverage for the SRAC directors and officers, has asserted a claim against the Company for indemnification of certain former SRAC directors and officers in connection with a lawsuit captioned In re Momentus, Inc. Stockholders Litigation, No. 2023-0322, pending in the Delaware Court of Chancery (the “Consolidated Delaware Action”). ANV has requested reimbursement of $1.2 million for defense costs paid and contribution to a global settlement and has indicated it is prepared to file suit if a settlement is not reached. In April 2026, the Company and ANV agreed in principle to settle this matter for $1.0 million. The parties are negotiating the terms of a release and settlement agreement. The Company has made a settlement offer of $0.1 million in shares of Class A common stock to each of the three former SRAC directors and officers subject to the Consolidated Delaware Action. Discussions with ANV and the affected individuals are ongoing, but there can be no assurances a resolution will be achieved.

The Company entered a lease for office space at 1762 Automation Parkway, San Jose, California 95131 in December 2025. Previously, the Company leased a facility at 3901 North First Street, San Jose, California 95134 (“3901”) that expired on March 31, 2026. The Company vacated 3901 on or before lease termination.

Under the sublease for 3901, the Company has an obligation to restore certain modifications prior to termination of the lease. The Company is unable to complete these restorations on that timeline and is negotiating with the sublandlord and the landlord regarding a financial settlement. The Company believes that it is probable that it will be required to pay a yet-to-be-determined amount of restoration costs. Total restoration costs should not exceed $0.7 million to $0.8 million based on construction proposals received by the Company and the sublandlord. However, the Company’s obligation to restore certain alterations is subject to the landlord’s having designated such alterations for removal at the time the landlord approved the Company’s alteration plans. The Company has requested documentation from the landlord to evidence the Company’s restoration obligations. The Company has not yet received such documentation. The Company has recorded an asset retirement obligation (“ARO”) of $0.5 million related to these restoration costs, which it believes represents the low end of the range of possible loss.

On April 21, 2026, the landlord filed a complaint against the sublandlord in the Superior Court of the State of California County of Santa Clara seeking damages for breach of lease. As of the date of this filing, the Company has not received notice that the sublandlord has filed a cross-complaint against the Company.

These and other litigation matters may be time-consuming, divert management’s attention and resources, cause the Company to incur significant defense and settlement costs or liability, even if we believe the claims asserted against us are without merit. We intend to vigorously defend against all such claims. Because of the potential risks, expenses and uncertainties of litigation, as well as claims for indemnity from various of the parties concerned, we may from time to time settle disputes, even where we believe that we have meritorious claims or defenses. Because litigation is inherently unpredictable, further compounded by various claims for indemnity which may or may not be fully insured, we cannot assure that the results of these actions, either individually or in the aggregate, will not have a material adverse effect on our consolidated operating results and financial condition.

From time to time, the Company may be a party to litigation and subject to claims incident to the ordinary course of business or in connection with the matters discussed above. Although the results of litigation and claims cannot be predicted with certainty, the Company currently believes that the final outcome of these matters will not have a material adverse effect on its business. Regardless of the outcome, litigation can have an adverse impact on the Company because of judgment, defense and settlement costs, diversion of management resources and other factors. At each reporting period, the Company evaluates whether or not a potential loss amount or a potential range of loss is probable and reasonably estimable under ASC 450-20. Legal fees are expensed as incurred.

As of March 31, 2026, the Company has recorded accruals for certain probable loss contingencies and an ARO. These include $0.4 million accrued for the Khasis claim, $1.3 million for the ANV claim, $0.3 million for the 3901 sublease complaint, and a $0.5 million ARO recognized for the 3901 sublease. The $2.0 million of probable loss contingencies are recorded in litigation settlement contingency in the condensed consolidated balance sheets, and the $0.5 million ARO is recorded in other current liabilities in the condensed consolidated balance sheets. The Company believes these accruals are adequate based on information currently available.