The Company follows the guidance in Accounting Standards Codification (“ASC”) 820, “Fair Value Measurement” for its assets and liabilities that are re-measured and reported at fair value at the end of each reporting period.

The fair value of the Company’s common stock warrant liabilities reflects management’s estimate of amounts that the Company would have received in connection with the sale of the assets or paid in connection with the transfer of the liabilities in an orderly transaction between market participants at the measurement date. The following fair value hierarchy is used to classify assets and liabilities based on the observable inputs and unobservable inputs used in order to value the assets and liabilities:

The Company classifies financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation model. In addition to these unobservable inputs, the valuation models for Level 3 financial instruments typically also rely on a number of inputs that are readily observable, either directly or indirectly. The Company’s assessment of a particular input to the fair value measurement requires management to make judgments and consider factors specific to the asset or liability. The fair value hierarchy requires the use of observable market data when available in determining fair value. The Company recognizes transfers between levels within the fair value hierarchy, if any, at the end of each period.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Financial Assets

The Company values its Level 1 assets, consisting of money market funds and U.S. treasury bills and bonds using quoted prices in active markets for identical instruments.

Financial assets whose fair values are measured on a recurring basis using Level 2 inputs consist of commercial paper. The Company measures the fair values of these assets with the help of a pricing service that either provides quoted market prices in active markets for identical or similar securities or uses observable inputs for their pricing without applying significant adjustments.

Credit Agreement Warrants

On June 13, 2022, in connection with the Blue Torch Financing Agreement, the Company issued warrants to Blue Torch, which were exercisable for an aggregate of 437,024 shares of the Company’s Class A common stock with a per share exercise price of $16.08 (the “2022 Blue Torch Warrants”). In addition, in connection with the closing of the financing, the Company paid Urgent Capital LLC, a Delaware limited liability company, $600 in cash and issued a warrant to purchase 24,834 shares of the Company’s Class A common stock with a per share exercise price of $16.08 (the “Urgent Warrants”).

On September 27, 2023, in connection with the Waiver and Amendment No. 2 to Financing Agreement, which amended the Blue Torch Financing Agreement, the Company and certain affiliates of Blue Torch amended and restated the 2022 Blue Torch Warrants to reduce the per share exercise price from $16.08 to $5.44. The Company also concurrently issued new warrants to certain Blue Torch affiliates that were exercisable for an additional 597,082 shares of the Company’s Class A common stock at a per share exercise price of $5.44 (the “2023 Blue Torch Warrants” and together with the 2022 Blue Torch Warrants and the Urgent Warrants, the “Credit Agreement Warrants”).

On May 30, 2025, Blue Torch exercised 825,623 warrants to purchase shares of the Company’s Class A common stock on a cashless basis, in accordance with the applicable warrant agreement. Based on the exercise price of $5.44 and the Company’s Class A common stock price of $10.66 on the date of exercise, the Company issued 404,286 shares of Class A common stock. On June 11, 2025, Blue Torch exercised its remaining 208,483 warrants, excluding the Urgent Warrants, also on a cashless basis. Using the exercise price of $5.44 and the Company’s Class A common stock price of $11.83 on the date of exercise, the Company issued 112,611 shares of Class A common stock. No cash was received in connection with either exercise.

As of June 30, 2025, Urgent Warrants exercisable for 24,834 shares of Class A common stock remained outstanding.

The fair value of the Credit Agreement Warrants is estimated using the Black-Scholes model with inputs that include the Company’s Class A common stock price in an actively traded market, making this fair value classified as a Level 2 financial instrument. The other significant assumptions used in the model are the exercise price, expected term, volatility, interest rate, and expected dividend yield.

Securities Purchase Agreement Warrants

On March 12, 2025, the Company entered into the 2025 Securities Purchase Agreement with the purchasers named therein for the 2025 Private Placement of (i) 4,843,750 shares of Class A common stock at a purchase price of $8.00 per share and (ii)

Pre-Funded Warrants to purchase 156,250 shares of Class A common stock at a purchase price of $7.9999 per Pre-Funded Warrant. The Pre-Funded Warrants had an exercise price of $0.0001 per share of Class A common stock, were exercisable immediately and remained outstanding until fully exercised. The Pre-Funded Warrants were initially recorded at fair value at issuance which equal to the proceeds received on March 14, 2025. The Pre-Funded Warrants were classified as liabilities because they contain provisions that could require settlement in cash under certain circumstances, resulting in the instruments not being considered indexed to the Company’s own stock. These Pre-Funded Warrants were measured at fair value at each reporting date, with changes in fair value recognized in the condensed consolidated statements of operations.

On June 10, 2025, 156,250 Pre-Funded Warrants were exercised to purchase shares of the Company’s Class A common stock on a cashless basis, in accordance with the Pre-Funded Warrant agreement. Based on the exercise price of $0.0001 per share, the Company issued 156,249 shares of Class A common stock.

Contingent Earnout Liability

In connection with the Merger, eligible Spire equity holders are entitled to receive additional shares of the Company’s Class A common stock upon the achievement of certain earnout triggering events. The estimated fair value of the contingent earnout liability is determined using a Monte Carlo simulation using a distribution of potential outcomes on a monthly basis over the earnout period, which is a period up to five years post-closing of the Merger, prioritizing the most reliable information available, making this fair value classified as a Level 3 liability. The assumptions utilized in the calculation are based on the achievement of certain stock price milestones, including the current price of the Company’s Class A common stock, expected volatility, risk-free interest rate, expected term and expected dividend yield.

Cash, Cash Equivalents, and Marketable Securities

In accordance with the Company's investment policy, investments are placed in investment grade securities with high credit quality issuers, and generally limit the amount of credit exposure to any one issuer. The Company evaluates securities for impairment at the end of each reporting period. The Company did not record any impairment charges related to its available-for-sale securities during the three and six months ended June 30, 2025 and 2024.