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v3.25.3

Redeemable Convertible Preferred Stock, Redeemable Common Stock, and Stockholders’ Equity (Deficit) - 2019 Stock Option Plan and 2025 Equity Incentive Plan (Details) - USD ($) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Dec. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Shares outstanding (in shares) | 36,324,000 |  |  | 47,219,000
Granted (in shares) | 0 | 0 |  |
Fair value of shares vested | $ 27 | $ 32 |  |
Intrinsic value of stock options exercised | $ 940 | $ 40 |  |
Related Party |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Shares outstanding (in shares) | 375,000 |  |  |
2019 And 2025 Plans | Stock Options | Minimum |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
2019 And 2025 Plans | Stock Options | Maximum |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Vesting period | 4 years |  |  |
Expiration period | 10 years |  |  |
2019 Plan | Stock Options |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Number of shares authorized (in shares) |  |  |  | 73,637,600
Number of shares available for grant (in shares) |  |  |  | 3,750,480
2025 Plan | Stock Options |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Number of shares available for grant (in shares) | 46,370,204 |  |  |
Shares reserved for future issuance (in shares) |  |  | 50,000,000 |
Capital shares reserved for future issuance annual increase |  |  | 5.00% |

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