The following table summarizes our investments measured at fair value on a recurring basis by balance sheet classification and investment type: | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | Fair Value - Level 1 | | Fair Value - Level 2 | | | | Fair Value - Level 3 | | Cash equivalents | | | | | | | | | Money market funds | $ | 305.1 | | | $ | — | | | | | $ | — | | | U.S. Treasury securities | 452.6 | | | — | | | | | — | | | Time deposits | 15.9 | | | — | | | | | — | | | Marketable securities | | | | | | | | | U.S. Treasury securities | 110.5 | | | — | | | | | — | | Other assets | | | | | | | | | Convertible note investment | — | | | — | | | | | 8.5 | | | Total | $ | 884.1 | | | $ | — | | | | | $ | 8.5 | |
| | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Fair Value - Level 1 | | Fair Value - Level 2 | | | | Fair Value - Level 3 | | Cash equivalents | | | | | | | | | Money market funds | $ | 206.7 | | | $ | — | | | | | $ | — | | | | | | | | | | | U.S. Treasury securities | 556.6 | | | — | | | | | — | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total | $ | 763.3 | | | $ | — | | | | | $ | — | |
The amortized cost, unrealized gains and losses, and estimated fair value of cash equivalents and marketable securities consisted of the following: | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Fair Value | | Cash equivalents | | | | | | | | | Money market funds | $ | 305.1 | | | $ | — | | | $ | — | | | $ | 305.1 | | | Time deposits | 15.9 | | | — | | | — | | | 15.9 | | | U.S. Treasury securities | 452.6 | | | — | | | — | | | 452.6 | | | Marketable securities | | | | | | | | | U.S. Treasury securities | 110.6 | | | — | | | (0.1) | | | 110.5 | | | Total | $ | 884.2 | | | $ | — | | | $ | (0.1) | | | $ | 884.1 | |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Fair Value | | Cash equivalents | | | | | | | | | Money market funds | $ | 206.7 | | | $ | — | | | $ | — | | | $ | 206.7 | | | U.S. Treasury securities | 556.6 | | | — | | | — | | | 556.6 | | | Total | $ | 763.3 | | | $ | — | | | $ | — | | | $ | 763.3 | |
|