Fair Value Measurements
Assets and liabilities recorded at fair value on a recurring basis in the consolidated balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows:
Level 1 - Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date;
Level 2 - Inputs are observable, unadjusted quoted prices in active markets for similar assets or liabilities, unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities; and
Level 3 - Unobservable inputs that are significant to the measurement of the fair value of the assets or liabilities that are supported by little or no market data.
A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the asset or liability.
The Company’s financial assets consist of Level 1 and 2 assets. The Company classifies its cash equivalents and marketable debt securities within Level 1 or Level 2 because they are valued using either quoted market prices or inputs other than quoted prices which are directly or indirectly observable in the market, including readily-available pricing sources for the identical underlying security which may not be actively traded. The Company’s fixed income available-for-
sale securities consist of high quality, investment grade securities from diverse issuers. The valuation techniques used to measure the fair value of the Company’s marketable debt securities were derived from non-binding market consensus prices that are corroborated by observable market data and quoted market prices for similar instruments.
The Company’s financial liabilities measured at fair value on a recurring basis consist of Level 1, Level 2 and Level 3 liabilities. The Company’s Public Warrants (as defined in Note 8) are classified as Level 1 because they are directly observable in the market. The Company classifies the Private Placement Warrants (as defined in Note 8) within Level 2, because they were valued using inputs other than quoted prices which are directly observable in the market, including readily available pricing for the Company’s Public Warrants. The Company classifies Delta Warrant, Earnout Shares Liability (as defined in Note 8) and EBITDA Earnout liability (as defined in Note 4) within Level 3, because they were valued using unobservable inputs that are significant to the fair value measurement. The Delta Warrant, Earnout Shares Liability and EBITDA Earnout liability are measured at fair value on a recurring basis. Changes in fair value of Level 3 liabilities are recorded in total other income (loss), net, in the consolidated statements of operations.
The following tables set forth the fair value of the Company’s financial assets and liabilities measured on a recurring basis by level within the fair value hierarchy (in thousands):
December 31, 2025
Level 1Level 2Level 3Total
Assets measured at fair value
Money market funds$218,080 $— $— $218,080 
Cash equivalents$218,080 $— $— $218,080 
Term deposits$— $30,937 $— $30,937 
Asset backed securities— 94,183 — 94,183 
Government debt securities— 641,172 — 641,172 
Corporate debt securities— 400,814 — 400,814 
Available-for-sale investments— 1,167,106 — 1,167,106 
Total fair value of assets$218,080 $1,167,106 $— $1,385,186 
Liabilities measured at fair value
Common stock warrant liabilities (Public)$56,392 $— $— $56,392 
Common stock warrant liabilities (Delta)— — 48,486 48,486 
Warrant liability56,392 — 48,486 104,878 
Earnout Shares Liability— — 156,692 156,692 
EBITDA Earnout Liability$— $— $13,424 $13,424 
Total fair value of liabilities$56,392 $— $218,602 $274,994 
December 31, 2024
Level 1Level 2Level 3Total
Assets measured at fair value
Money market funds$178,383 $— $— $178,383 
Cash equivalents$178,383 $— $— $178,383 
Term deposits— 31,179 — 31,179 
Asset backed securities— 98,412 — 98,412 
Government debt securities— 206,945 — 206,945 
Corporate debt securities— 396,688 — 396,688 
Available-for-sale investments— 733,224 — 733,224 
Total fair value of assets$178,383 $733,224 $— $911,607 
Liabilities measured at fair value
Common stock warrant liabilities (Public)$34,843 $— $— $34,843 
Common stock warrant liabilities (Private)— 23,296 — 23,296 
Common stock warrant liabilities (Delta)— — 37,271 37,271 
Warrant liability34,843 23,296 37,271 95,410 
Earnout Shares Liability— — 117,416 117,416 
Total fair value of liabilities$34,843 $23,296 $154,687 $212,826 
The following is a summary of the Company’s available-for-sale securities (in thousands):
December 31, 2025
Cost or Amortized CostUnrealized
Gains
Unrealized
Losses
Allowance for credit lossesFair value
Assets measured at fair value
Term deposits$30,937 $— $— $— $30,937 
Asset backed securities93,990 193 — — 94,183 
Government debt securities640,270 902 — — 641,172 
Corporate debt securities400,231 592 (9)— 400,814 
Total$1,165,428 $1,687 $(9)$— $1,167,106 
December 31, 2024
Cost or Amortized CostUnrealized
Gains
Unrealized
Losses
Allowance for credit lossesFair Value
Term deposits$31,179 $— $— $— $31,179 
Asset backed securities98,277 135 — — 98,412 
Government debt securities206,779 166 — — 206,945 
Corporate debt securities396,410 352 (74)— 396,688 
Total$732,645 $653 $(74)$— $733,224 
The weighted-average remaining maturity of the Company’s investment portfolio was less than one year as of the periods presented. No individual security incurred continuous significant unrealized losses for greater than 12 months. There were no transfers between Level 1, Level 2 or Level 3 financial instruments in the years ended December 31, 2025 and 2024.
The following table sets forth a summary of the change in the fair value, which is recognized as a component of total other loss, net within the consolidated statement of operations, of the Company’s Level 3 financial liabilities (in thousands):
Earnout Shares LiabilityCommon stock warrant liabilities (Delta)EBITDA Earnout Liability
Fair value as of January 1, 2025$117,416 $37,271 $— 
Issuance (Settlement) of liability(60,709)— 7,631 
Change in fair value99,985 17,008 5,793 
Fair value as of December 31 2025$156,692 $54,279 $13,424 
The fair value of the Earnout Shares Liability and Common stock warrant liabilities (Delta) (see Note 8) and EBITDA Earnout liability (see Note 4) are based on significant unobservable inputs, which represent Level 3 measurements within the fair value hierarchy.

Historical Timeline

Fiscal YearFiled
2025Feb 27, 2026Showing above
2024Feb 27, 2025
2023Feb 27, 2024
2022Mar 1, 2023
2021Mar 28, 2022
2020Mar 3, 2021

About Fair Value Disclosures

Fair value disclosures classify all assets and liabilities measured at fair value into a three-level hierarchy: Level 1 (quoted market prices), Level 2 (observable inputs like yield curves), and Level 3 (unobservable inputs requiring management estimates). The proportion of Level 3 assets directly reflects how much of the balance sheet depends on internal models rather than market evidence.

Key signals: a growing Level 3 balance relative to total fair-value assets increases valuation uncertainty and earnings volatility risk. Watch for transfers between levels — assets moving from Level 2 to Level 3 often signal deteriorating market liquidity. Unrealized gains and losses on Level 3 positions flow through earnings or other comprehensive income, so large swings deserve scrutiny. For financial institutions, examine the sensitivity disclosures that show how Level 3 valuations change under alternative assumptions. Compare the fair value of debt against its carrying amount to gauge hidden leverage.