| Debt Securities, Available-for-sale |
The following tables summarize the Company’s cash and available-for-sale debt securities’ amortized cost, gross unrealized gains, gross unrealized losses, allowance for credit loss, and fair value by significant investment category reported as cash and cash equivalents, short-term investments, or long-term investments (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of June 30, 2026 | | | | | | | | | | | | Reported as: | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Allowance for Credit Loss | | Fair Value | | Cash and Cash Equivalents | | Short- term Investments | | Long- term Investments | | Cash | $ | 601.0 | | | $ | — | | | $ | — | | | $ | — | | | $ | 601.0 | | | $ | 601.0 | | | $ | — | | | $ | — | | | Level 1: | | | | | | | | | | | | | | | | | Money market funds | 1,802.4 | | | — | | | — | | | — | | | 1,802.4 | | | 1,802.4 | | | — | | | — | | | U.S. treasuries | 5,448.1 | | | 5.9 | | | (15.2) | | | — | | | 5,438.8 | | | 353.8 | | | 2,163.7 | | | 2,921.3 | | | Subtotal | 7,250.5 | | | 5.9 | | | (15.2) | | | — | | | 7,241.2 | | | 2,156.2 | | | 2,163.7 | | | 2,921.3 | | Level 2(1): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Corporate debt securities | 499.6 | | | — | | | (6.0) | | | (0.1) | | | 493.5 | | | 3.2 | | | 52.0 | | | 438.3 | | | U.S. government agencies | 289.7 | | | 0.4 | | | (0.3) | | | — | | | 289.8 | | | — | | | 240.1 | | | 49.7 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Subtotal | 789.3 | | | 0.4 | | | (6.3) | | | (0.1) | | | 783.3 | | | 3.2 | | | 292.1 | | | 488.0 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total assets measured at fair value | $ | 8,640.8 | | | $ | 6.3 | | | $ | (21.5) | | | $ | (0.1) | | | $ | 8,625.5 | | | $ | 2,760.4 | | | $ | 2,455.8 | | | $ | 3,409.3 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2025 | | | | | | | | | | | | Reported as: | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Allowance for Credit Loss | | Fair Value | | Cash and Cash Equivalents | | Short- term Investments | | Long- term Investments | | Cash | $ | 514.9 | | | $ | — | | | $ | — | | | $ | — | | | $ | 514.9 | | | $ | 514.9 | | | $ | — | | | $ | — | | | Level 1: | | | | | | | | | | | | | | | | | Money market funds | 2,287.0 | | | — | | | — | | | — | | | 2,287.0 | | | 2,287.0 | | | — | | | — | | | U.S. treasuries | 5,694.3 | | | 39.0 | | | (0.9) | | | — | | | 5,732.4 | | | 565.1 | | | 2,345.5 | | | 2,821.8 | | | Subtotal | 7,981.3 | | | 39.0 | | | (0.9) | | | — | | | 8,019.4 | | | 2,852.1 | | | 2,345.5 | | | 2,821.8 | | Level 2(1): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Corporate debt securities | 167.8 | | | — | | | (0.7) | | | (0.1) | | | 167.0 | | | 1.0 | | | 78.4 | | | 87.6 | | | U.S. government agencies | 330.6 | | | 2.3 | | | (0.1) | | | — | | | 332.8 | | | — | | | 143.0 | | | 189.8 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Subtotal | 498.4 | | | 2.3 | | | (0.8) | | | (0.1) | | | 499.8 | | | 1.0 | | | 221.4 | | | 277.4 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total assets measured at fair value | $ | 8,994.6 | | | $ | 41.3 | | | $ | (1.7) | | | $ | (0.1) | | | $ | 9,034.1 | | | $ | 3,368.0 | | | $ | 2,566.9 | | | $ | 3,099.2 | | | | | | | | | | | | | | | | | | (1) When sufficient quoted pricing for identical securities is not available, the Company uses market pricing and other observable inputs for similar securities from various third-party data providers. |
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| Summary of Contractual Maturities of Cash Equivalents and Available-For-Sale Investments |
The following table summarizes the contractual maturities of the Company’s cash equivalents and available-for-sale debt securities, excluding money market funds (in millions): | | | | | | | | | | | | | As of June 30, 2026 | | Amortized Cost | | Fair Value | | Mature in less than one year | $ | 2,811.7 | | | $ | 2,812.7 | | | Mature in one to five years | 3,425.7 | | | 3,409.4 | | | | | | | Total | $ | 6,237.4 | | | $ | 6,222.1 | |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value |
The following tables present the breakdown of the available-for-sale debt securities with unrealized losses (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of June 30, 2026 | | Unrealized losses less than 12 months | | Unrealized losses 12 months or greater | | Total | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | U.S. treasuries | $ | 2,777.5 | | | $ | (15.0) | | | $ | 111.2 | | | $ | (0.2) | | | $ | 2,888.7 | | | $ | (15.2) | | | | | | | | | | | | | | | Corporate debt securities | 467.3 | | | (5.7) | | | 25.9 | | | (0.3) | | | 493.2 | | | (6.0) | | | U.S. government agencies | 92.3 | | | (0.3) | | | 5.0 | | | — | | | 97.3 | | | (0.3) | | | | | | | | | | | | | | | Total | $ | 3,337.1 | | | $ | (21.0) | | | $ | 142.1 | | | $ | (0.5) | | | $ | 3,479.2 | | | $ | (21.5) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2025 | | | | | | Unrealized losses less than 12 months | | Unrealized losses 12 months or greater | | Total | | | | | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | | | | | U.S. treasuries | $ | 298.0 | | | $ | (0.3) | | | $ | 164.4 | | | $ | (0.6) | | | $ | 462.4 | | | $ | (0.9) | | | | | | | | | | | | | | | | | | | | | | | Corporate debt securities | 44.5 | | | — | | | 73.6 | | | (0.7) | | | 118.1 | | | (0.7) | | | | | | | U.S. government agencies | — | | | — | | | 29.2 | | | (0.1) | | | 29.2 | | | (0.1) | | | | | | | | | | | | | | | | | | | | | | | Total | $ | 342.5 | | | $ | (0.3) | | | $ | 267.2 | | | $ | (1.4) | | | $ | 609.7 | | | $ | (1.7) | | | | | |
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| Summary of Equity Investment Activity |
The following table is a summary of the activity related to equity investments (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reported as: | | December 31, 2025 Carrying Value | | Changes in Fair Value (1) | | Purchases / Sales / Other (2) | | June 30, 2026 Carrying Value | | Prepaids and other current assets | | Intangible and other assets, net | | | | | | | | | | | | | Equity investments without readily determinable fair value | $ | 121.7 | | | $ | 0.8 | | | $ | 6.6 | | | $ | 129.1 | | | $ | — | | | $ | 129.1 | | | | | | | | | | | | | | | (1) Recorded in interest and other income, net. | (2) Other includes foreign currency translation gains/(losses). | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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