| Schedule of Financial Assets Measured at Fair Value on Recurring Basis |
The following tables set forth our financial assets that are measured at fair value on a recurring basis, excluding publicly traded equity securities, as of March 31, 2025 and December 31, 2024: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of March 31, 2025 | | Fair Value Hierarchy | | Cost or Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Total Estimated Fair Value | | | | | | | | | | | | | | (in thousands) | | Cash | | | $ | 456,670 | | | $ | — | | | $ | — | | | $ | 456,670 | | | Cash equivalents: | | | | | | | | | | | Money market funds | Level 1 | | 454,557 | | | — | | | — | | | 454,557 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total cash and cash equivalents | | | 911,227 | | | — | | | — | | | 911,227 | | | Marketable debt securities: | | | | | | | | | | | U.S. government securities | Level 1 | | 2,191,534 | | | 6,486 | | | (1,233) | | | 2,196,787 | | | | | | | | | | | | | Corporate debt securities | Level 2 | | 90,591 | | | 81 | | | (3) | | | 90,669 | | | | | | | | | | | | | | | | | | | | | | | Total marketable debt securities | | | 2,282,125 | | | 6,567 | | | (1,236) | | | 2,287,456 | | | Total | | | $ | 3,193,352 | | | $ | 6,567 | | | $ | (1,236) | | | $ | 3,198,683 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2024 | | Fair Value Hierarchy | | Cost or Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Total Estimated Fair Value | | | | | | | | | | | | | | (in thousands) | | Cash | | | $ | 348,251 | | | $ | — | | | $ | — | | | $ | 348,251 | | | Cash equivalents: | | | | | | | | | | | Money market funds | Level 1 | | 694,323 | | | — | | | (30) | | | 694,293 | | | U.S. government securities | Level 1 | | 3,991 | | | — | | | (1) | | | 3,990 | | | | | | | | | | | | | | | | | | | | | | | Total cash and cash equivalents | | | 1,046,565 | | | — | | | (31) | | | 1,046,534 | | | Marketable debt securities: | | | | | | | | | | | U.S. government securities | Level 1 | | 2,186,192 | | | 4,984 | | | (3,292) | | | 2,187,884 | | | | | | | | | | | | | Corporate debt securities | Level 2 | | 129,217 | | | 229 | | | (5) | | | 129,441 | | | | | | | | | | | | | | | | | | | | | | | Total marketable debt securities | | | 2,315,409 | | | 5,213 | | | (3,297) | | | 2,317,325 | | | Total | | | $ | 3,361,974 | | | $ | 5,213 | | | $ | (3,328) | | | $ | 3,363,859 | |
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| Schedule of Gain (Loss) on Strategic Investments |
Gains and losses recognized during the periods presented were as follows: | | | | | | | | | | | | | | | | | Three Months Ended March 31, | | | | 2025 | | 2024 | | | | | | | | | | | | | | (in thousands) | | Gains (losses) recognized on strategic investments sold during the period, net | $ | — | | | $ | — | | | | | | | Unrealized gains on strategic investments still held at the reporting date | — | | | 182 | | | | | | | Unrealized losses, including impairments, on strategic investments still held at the reporting date | (11,588) | | | (6,449) | | | | | | | Gains (losses) on strategic investments, net | $ | (11,588) | | | $ | (6,267) | | | | | |
Gains and losses recognized during the periods presented, which are included within other income (expense), net on our consolidated statements of operations, were as follows: | | | | | | | | | | | | | | | | | Three Months Ended March 31, | | | | 2025 | | 2024 | | | | | | | | | | | | | | (in thousands) | | Gains (losses) recognized on publicly traded equity securities sold during the period, net | $ | — | | | $ | — | | | | | | | Unrealized gains (losses) on publicly traded equity securities still held at the reporting date, net | (4,213) | | | (2,721) | | | | | | | Gains (losses) on publicly traded equity securities, net | $ | (4,213) | | | $ | (2,721) | | | | | |
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| Schedule of Cash and Cash Equivalents |
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in our consolidated balance sheet to the total of the amounts in the consolidated statements of cash flows. | | | | | | | | | | | | | As of March 31, | | 2025 | | 2024 | | | | | | (in thousands) | | Cash and cash equivalents | $ | 911,227 | | | $ | 1,060,393 | | | Restricted cash, included in other assets | 4,852 | | | 3,487 | | | Total cash, cash equivalents, and restricted cash | $ | 916,079 | | | $ | 1,063,880 | |
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| Restrictions on Cash and Cash Equivalents |
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in our consolidated balance sheet to the total of the amounts in the consolidated statements of cash flows. | | | | | | | | | | | | | As of March 31, | | 2025 | | 2024 | | | | | | (in thousands) | | Cash and cash equivalents | $ | 911,227 | | | $ | 1,060,393 | | | Restricted cash, included in other assets | 4,852 | | | 3,487 | | | Total cash, cash equivalents, and restricted cash | $ | 916,079 | | | $ | 1,063,880 | |
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