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Fair Value Measurements (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financial Assets: |  |
Marketable Securities: | $ 4,073,531 | $ 2,942,076
Corporate debt securities |  |
Financial Assets: |  |
Marketable Securities: | 2,583,393 | 1,896,041
U.S. government treasury securities |  |
Financial Assets: |  |
Marketable Securities: | 695,894 | 466,460
Commercial paper |  |
Financial Assets: |  |
Marketable Securities: | 599,967 | 390,283
Certificates of deposit |  |
Financial Assets: |  |
Marketable Securities: | 192,784 | 187,802
U.S. government agency securities |  |
Financial Assets: |  |
Marketable Securities: | 1,493 | 1,490
Fair Value, Recurring |  |
Financial Assets: |  |
Total financial assets | 4,416,040 | 4,147,593
Fair Value, Recurring | Corporate debt securities |  |
Financial Assets: |  |
Marketable Securities: | 2,583,393 | 1,896,041
Fair Value, Recurring | U.S. government treasury securities |  |
Financial Assets: |  |
Marketable Securities: | 695,894 | 466,460
Fair Value, Recurring | Commercial paper |  |
Financial Assets: |  |
Marketable Securities: | 599,967 | 390,283
Fair Value, Recurring | Certificates of deposit |  |
Financial Assets: |  |
Marketable Securities: | 192,784 | 187,802
Fair Value, Recurring | U.S. government agency securities |  |
Financial Assets: |  |
Marketable Securities: | 1,493 | 1,490
Fair Value, Recurring | Money market funds |  |
Financial Assets: |  |
Cash equivalents: | 311,106 | 1,193,927
Fair Value, Recurring | Commercial paper |  |
Financial Assets: |  |
Cash equivalents: | 29,879 | 9,088
Fair Value, Recurring | Corporate debt securities |  |
Financial Assets: |  |
Cash equivalents: | 1,524 | 2,502
Fair Value, Recurring | Level 1 |  |
Financial Assets: |  |
Total financial assets | 311,106 | 1,193,927
Fair Value, Recurring | Level 1 | Corporate debt securities |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 1 | U.S. government treasury securities |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 1 | Commercial paper |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 1 | Certificates of deposit |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 1 | U.S. government agency securities |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 1 | Money market funds |  |
Financial Assets: |  |
Cash equivalents: | 311,106 | 1,193,927
Fair Value, Recurring | Level 1 | Commercial paper |  |
Financial Assets: |  |
Cash equivalents: | 0 | 0
Fair Value, Recurring | Level 1 | Corporate debt securities |  |
Financial Assets: |  |
Cash equivalents: | 0 | 0
Fair Value, Recurring | Level 2 |  |
Financial Assets: |  |
Total financial assets | 4,104,934 | 2,953,666
Fair Value, Recurring | Level 2 | Corporate debt securities |  |
Financial Assets: |  |
Marketable Securities: | 2,583,393 | 1,896,041
Fair Value, Recurring | Level 2 | U.S. government treasury securities |  |
Financial Assets: |  |
Marketable Securities: | 695,894 | 466,460
Fair Value, Recurring | Level 2 | Commercial paper |  |
Financial Assets: |  |
Marketable Securities: | 599,967 | 390,283
Fair Value, Recurring | Level 2 | Certificates of deposit |  |
Financial Assets: |  |
Marketable Securities: | 192,784 | 187,802
Fair Value, Recurring | Level 2 | U.S. government agency securities |  |
Financial Assets: |  |
Marketable Securities: | 1,493 | 1,490
Fair Value, Recurring | Level 2 | Money market funds |  |
Financial Assets: |  |
Cash equivalents: | 0 | 0
Fair Value, Recurring | Level 2 | Commercial paper |  |
Financial Assets: |  |
Cash equivalents: | 29,879 | 9,088
Fair Value, Recurring | Level 2 | Corporate debt securities |  |
Financial Assets: |  |
Cash equivalents: | 1,524 | 2,502
Fair Value, Recurring | Level 3 |  |
Financial Assets: |  |
Total financial assets | 0 | 0
Fair Value, Recurring | Level 3 | Corporate debt securities |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 3 | U.S. government treasury securities |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 3 | Commercial paper |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 3 | Certificates of deposit |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 3 | U.S. government agency securities |  |
Financial Assets: |  |
Marketable Securities: | 0 | 0
Fair Value, Recurring | Level 3 | Money market funds |  |
Financial Assets: |  |
Cash equivalents: | 0 | 0
Fair Value, Recurring | Level 3 | Commercial paper |  |
Financial Assets: |  |
Cash equivalents: | 0 | 0
Fair Value, Recurring | Level 3 | Corporate debt securities |  |
Financial Assets: |  |
Cash equivalents: | $ 0 | $ 0

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