(7) Fair Value Measurements

The Company holds certain assets that are required to be measured at fair value in accordance with GAAP. The Company determined fair value of these assets based on the following three levels of inputs:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices 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 assets or liabilities. Some of the Company’s marketable securities primarily utilize broker quotes in a non-active market for valuation of these securities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities, therefore requiring an entity to develop its own assumptions.

As of December 31, 2025 and 2024, the Company held certain assets that are required to be measured at fair value on a recurring basis. Assets measured at fair value on a recurring basis are summarized below (in thousands):

Fair Value Measurements as of December 31, 2025

  ​ ​ ​

Total

  ​ ​ ​

Level 1

  ​ ​ ​

Level 2

  ​ ​ ​

Level 3

Marketable Securities

Bonds and bond funds

$

487,699

$

$

487,699

$

Commercial paper

 

96,537

 

 

96,537

 

584,236

584,236

Investments in Other Companies

4,253

4,253

Cash and Cash Equivalents

122,673

122,673

Total Assets Measured at Fair Value

$

711,162

$

126,926

$

584,236

$

Fair Value Measurements as of December 31, 2024

Total

Level 1

Level 2

Level 3

Marketable Securities

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

  ​ ​ ​

Bonds and bond funds

$

462,333

$

$

462,333

$

Commercial paper

 

111,933

 

 

111,933

 

574,266

574,266

Investments in Other Companies

8,160

 

 

8,160

Cash and Cash Equivalents

227,362

227,362

Total Assets Measured at Fair Value

$

809,788

$

227,362

$

574,266

$

8,160

The Company’s “Marketable Securities” classified as Level 2 securities primarily utilize broker quotes in a non-active market for valuation of these securities.

During the year ended December 31, 2025, the Company exercised its warrant to purchase 1,500,000 shares of common stock of Eve Holding, Inc. (“Eve”) through a cashless exercise and received shares of common stock of Eve. See Note 12 “Investments in Other Companies” for additional information regarding the Company’s investment in Eve. The warrant was classified as Level 3 within the fair value hierarchy as of December 31, 2024. The Company’s shares of Eve’s common stock are actively traded and are valued using quoted market prices and are classified as Level 1 within the fair value hierarchy as of December 31, 2025. The Company’s policy regarding the recording of transfers between levels is to record any such transfers at the end of the reporting period.

Historical Timeline

Fiscal YearFiled
2025Feb 17, 2026Showing above
2024Feb 13, 2025
2023Feb 15, 2024
2022Feb 16, 2023
2021Feb 17, 2022
2020Feb 22, 2021
2019Feb 18, 2020
2018Feb 21, 2019
2017Feb 26, 2018
2016Feb 27, 2017
2015Feb 26, 2016

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.