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Fair Value Measurement | 9 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Fair Value Measurement | 7. Fair Value Measurement The Company measures its financial assets and liabilities at fair value each reporting period using a fair value hierarchy that prioritizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The Company uses the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. The carrying amounts of Company’s financial instruments, which include cash equivalents, accounts receivable, prepaid expenses, other current assets, accounts payable, accrued liabilities and certain other current liabilities approximate fair value because of their short-term maturities. The Company issued warrants to purchase Series J Preferred Stock (the “Series J Warrants”) in connection with the Company’s entrance into the Term Loans (as defined in Note 9. Notes Payable and Warrants) and issued warrants to purchase common stock (the “Common Warrants”, together with the “Series J Warrants”, the “Warrants”) and two tranche obligations: (1) the RPM Call Option and (2) the Majority Sponsor Top-Up (both as defined in Note 11. Stockholders’ Equity (Deficit) and Redeemable Convertible Preferred Stock) in connection with the Company’s issuance of the Series D-1 Preferred Stock. The Company determined that the Warrants and tranche obligations should be classified as either liabilities or assets on the unaudited condensed consolidated balance sheets depending on valuation and are recorded at fair value both initially and subsequently, with changes in fair value recorded through earnings. The Warrants are recorded within warrant liability, the RPM Call Option is recorded within other current liabilities, and the Majority Sponsor Top-Up is recorded within other current assets on the audited consolidated balance sheet as of December 31, 2024. In March 2025, the Majority Sponsor Top-Up expired unexercised when the total amount of Series D-1 Preferred Stock purchased by investors exceeded $250.0 million. On March 24, 2025, the RPM Call Option was terminated via amendment of the Series D stock purchase agreement. As a result, the $0.2 million Majority Sponsor Top-Up and $4.2 million RPM Call Option were derecognized from the unaudited condensed consolidated balance sheet as of September 30, 2025, and recognized in other income, net in the unaudited condensed consolidated statement of net loss and comprehensive loss for the nine months ended September 30, 2025. Prior to the Company’s IPO on August 8, 2025, the Company used a Monte Carlo simulation model and probability weighted valuations based on different scenarios including change of control, IPO and default scenarios to value the Warrants. The value per Warrant under the change of control scenario was the average value per unit under 50,000 Monte Carlo simulations, the value per Warrant under the IPO scenario was based on the number of common stock equivalent shares (including the Warrants) and total estimated equity value of the Company, and the value per Warrant under the default scenario was assumed to be zero. In connection with the IPO, the Common Warrants were net exercised into 1.0 million shares of common stock. The Series J Warrants remain outstanding and continue to be classified as liabilities and remeasured at fair value as of September 30, 2025. Following the IPO, the Company determines the fair value of the Series J Warrants based on the intrinsic value method, calculated as the difference between the trading price of its common stock and the exercise price of the Series J Warrants. As of September 30, 2025, the fair value per Series J Warrant was $8.1475 per warrant. The following tables present the key inputs applied in the valuations of the Series J Warrants as of December 31, 2024:
|  | December 31, 2024 |
|  | Change of Control Scenario |  |  | IPO Scenario |  |  | Default Scenario |
Average value per Series J Warrant |  | $ | 8.43 |  |  | $ | 2.86 |  |  | $ | — |
Event weighting |  |  | 55 | % |  |  | 15 | % |  |  | 30 | %
Weighted average value per Series J Warrant |  | $ | 4.64 |  |  | $ | 0.43 |  |  | $ | — |
Total probability weighted average value per Series J Warrant |  |  |  |  |  |  |  | $ | 5.07 |
The following tables present the key inputs applied in the valuations of the Common Warrants as of December 31, 2024:
|  | December 31, 2024 |
|  | Change of Control Scenario |  |  | IPO Scenario |  |  | Default Scenario |
Value per Common Warrant on a marketable basis |  | $ | 0.98 |  |  | $ | 7.03 |  |  |  | — |
Discount for lack of marketability |  |  | 40 | % |  |  | 20 | % |  | N/A |
Value per Common Warrant on a non-marketable basis |  | $ | 0.59 |  |  | $ | 5.62 |  |  | — |
Event weighting |  |  | 55 | % |  |  | 15 | % |  |  | 30 | %
Weighted value per Common Warrant |  | $ | 0.32 |  |  | $ | 0.84 |  |  |  | — |
Total probability weighted value per Common Warrant |  |  |  |  |  |  |  | $ | 1.16 |
The Company uses the Black-Scholes option-pricing valuation model to value the RPM Call Option. The following table presents the key inputs applied in the valuation of the RPM Call Option as of December 31, 2024:
|  | December 31, 2024 |
Weighted average Series D Preferred Stock Price |  | $ | 16.53 |
Exercise price for the RPM Option |  | $ | 16.92 |
Risk-free rate |  |  | 4.27 | %
Volatility |  |  | 60 | %
Term (years) |  |  | 0.36 |
Black-Scholes value (per share) |  | $ | 2.29 |
Number of units |  |  | 1,820 |
Value of RPM Option |  | $ | 4,159 |
The Company uses the forward pricing valuation model to value the Majority Sponsor Top-Up. The following table presents the key inputs applied in the valuations of the Majority Sponsor Top-Up as of December 31, 2024:
|  | December 31, 2024 |
Amount subject to the Majority Sponsor Top-Up |  | $ | 20,198 |
Contractual purchase price for Series D Preferred Stock (per share) |  | $ | 16.92 |
Weighted average Series D Preferred Stock price |  | $ | 16.53 |
Risk-free rate |  |  | 4.27 | %
Term (years) |  |  | 0.36 |
Discount factor |  |  | 0.9849 |
Value of forward obligation (per share) |  | $ | (0.14 | )
Number of units subject to purchase by majority sponsor |  |  | 1,194 |
Value of Majority Sponsor Top-Up |  | $ | (170 | )
The Company did not issue any Warrants during the three and nine months ended September 30, 2025. The fair value remeasurement of the Series J Warrants resulted in an increase in fair value of $2.7 million and $2.4 million for the three and nine months ended September 30, 2025, respectively, and $0.4 million and $0.5 million for the three and nine months ended September 30, 2024, respectively. The Company recognized losses of $39.5 million and $44.8 million related to the Common Warrants through their net exercise on August 8, 2025, during the three and nine months ended September 30, 2025, respectively. The fair value of the Series J Warrants as of September 30, 2025 was $5.3 million.
|  | September 30, 2025 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 622,256 |  |  | $ | — |  |  | $ | — |  |  | $ | 622,256 |
Money market funds |  |  | 372,906 |  |  |  | — |  |  |  | — |  |  |  | 372,906 |
Total financial assets |  | $ | 995,162 |  |  | $ | — |  |  | $ | — |  |  | $ | 995,162 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Series J Warrants |  |  | — |  |  |  | 5,267 |  |  |  | — |  |  |  | 5,267 |
Total financial liabilities |  | $ | — |  |  | $ | 5,267 |  |  | $ | — |  |  | $ | 5,267 |
The fair value of the Series J Warrants, Common Warrants, and tranche obligations as of December 31, 2024, was $2.9 million, $1.2 million and $4.0 million, respectively. The carrying value of the Term Loans approximated their estimated fair value as of December 31, 2024.
|  | December 31, 2024 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 81,847 |  |  | $ | — |  |  | $ | — |  |  | $ | 81,847 |
Restricted cash |  |  | 14,127 |  |  |  | — |  |  |  | — |  |  |  | 14,127 |
Money market funds |  |  | — |  |  |  | 41,584 |  |  |  | — |  |  |  | 41,584 |
Majority Sponsor Top-Up |  |  | — |  |  |  | — |  |  |  | 170 |  |  |  | 170 |
Total financial assets |  | $ | 95,974 |  |  | $ | 41,584 |  |  | $ | 170 |  |  | $ | 137,728 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Series J Warrants |  |  | — |  |  |  | — |  |  |  | 2,850 |  |  |  | 2,850 |
Common Warrants |  |  | — |  |  |  | — |  |  |  | 1,220 |  |  |  | 1,220 |
RPM Call Option |  |  | — |  |  |  | — |  |  |  | 4,159 |  |  |  | 4,159 |
Total financial liabilities |  | $ | — |  |  | $ | — |  |  | $ | 8,229 |  |  | $ | 8,229 |
During the three and nine months ended September 30, 2025, the Company recorded $5.3 million in transfers from Level 3 to Level 2 due to an increase in available observable inputs in market data upon completion of the IPO. There were no transfers between levels within the fair value hierarchy during the three and nine months ended September 30, 2024.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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