The Company’s significant accounting policies are described in the notes to the audited financial statements included in the Company's Current Report on Form 8-K/A filed on May 12, 2026 (amending the Current Report on Form 8-K filed on February 25, 2026), and in Blackbox's Annual Report on Form 10-K for the year ended December 31, 2025, which is incorporated by reference into such Current Reports. There have been no material changes to the Company’s significant accounting policies during the three months ended March 31, 2026 except as described below.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of expenses during the reporting period. Actual results could differ from those estimates. Significant estimates include, but are not limited to, accounting for the reverse recapitalization transaction, the valuation of equity instruments and stock-based compensation, the assessment of the recoverability of long-lived assets, including mineral properties, and the evaluation of the Company’s ability to continue as a going concern.

The accounting for payments under the Saskatchewan Research Council (SRC) arrangements requires judgment in determining whether amounts should be recorded as prepaid assets, research and development expense, project development expense, construction in progress, or property and equipment. This assessment depends on the nature of the underlying goods or services received, whether specific equipment or materials have been acquired, whether such equipment or materials have alternative future use, and whether costs are directly attributable to preparing a long-lived asset for its intended use.

Restricted cash consists of cash deposits that are not available for general corporate purposes due to contractual or other restrictions. The Company presents restricted cash together with cash and cash equivalents in the statement of cash flows and includes such amounts within current or non‑current assets on the consolidated balance sheets based on the expected timing of release of the restrictions.

As of March 31, 2026, restricted cash was $7.5 million and consisted of deposits received from prospective investors in connection with potential investment transactions. These deposits were subject to contractual conditions and were therefore not available for use in the Company’s operations. In April 2026, following a joint decision by the Company and the prospective investors not to proceed with the potential investments, the Company returned the full $7.5 million of

The following table provides a reconciliation of cash and restricted cash reported within the statement of financial position that sum to the total of the same such amounts shown in the statement of cash flows (in thousands).

The Company holds an investment in EVTEC Holdings Group Limited ("EVTEC"), a private UK-based automotive components manufacturer, acquired through the February 24, 2026 reverse recapitalization with Blackbox. The Company applies the measurement alternative for equity securities without a readily determinable fair value under ASC 321. Under this method, the investment is carried at cost minus impairment, plus or minus adjustments from observable price changes in orderly transactions for identical or similar investments of the same issuer See Note 4 – Blackbox Reverse Recapitalization.

The Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers, when control of goods or services is transferred to customers. PMTCM recognizes revenue from the sale of rare earth metals and magnet materials primarily under the output method or right-to-invoice practical expedient as production is completed and delivered to customers. Subscription revenue from the Blackbox trading analytics platform is recognized ratably over the subscription period on a straight-line basis.