| Schedule of Marketable Debt Securities |
The following tables summarize our marketable debt securities: | | | | | | | | | | | | | | | | | | | | | | | | | As of September 30, 2026 | | (In thousands) | Amortized
Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Fair Value | | U.S. treasury securities | $ | 890,175 | | | $ | 17 | | | $ | (7,248) | | | $ | 882,944 | | | Corporate notes | 518,707 | | | 11 | | | (4,423) | | | 514,295 | | | U.S. government-sponsored enterprise securities | 455,852 | | | 4 | | | (4,051) | | | 451,805 | | | Commercial paper | 28,132 | | | — | | | (48) | | | 28,084 | | | | | | | | | | | Total | $ | 1,892,866 | | | $ | 32 | | | $ | (15,770) | | | $ | 1,877,128 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2025 | | | | | | (In thousands) | Amortized
Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Fair Value | | | | | | U.S. treasury securities | $ | 670,566 | | | $ | 1,736 | | | $ | (9) | | | $ | 672,293 | | | | | | | Corporate notes | 332,104 | | | 1,152 | | | (15) | | | 333,241 | | | | | | | U.S. government-sponsored enterprise securities | 254,829 | | | 559 | | | (64) | | | 255,324 | | | | | | | Commercial paper | 9,012 | | | — | | | — | | | 9,012 | | | | | | | | | | | | | | | | | | | Municipal securities | 5,000 | | | 1 | | | — | | | 5,001 | | | | | | | Total | $ | 1,271,511 | | | $ | 3,448 | | | $ | (88) | | | $ | 1,274,871 | | | | | |
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| Schedule of Fair Value of Marketable Debt Securities |
The fair values of our marketable debt securities by classification in the condensed consolidated balance sheets were as follows: | | | | | | | | | | | | | (In thousands) | As of September 30, 2026 | | As of December 31, 2025 | | Marketable debt securities | $ | 1,832,915 | | | $ | 1,251,234 | | | Cash and cash equivalents | 44,213 | | | 23,637 | | | Total | $ | 1,877,128 | | | $ | 1,274,871 | |
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