A summary of our debt securities as of June 30, 2026 is as follows (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Fair Value | | Available-for-sale debt securities: | | | | | | | | | U.S. government and agency securities | $ | 35.2 | | | $ | 0.1 | | | $ | (0.2) | | | $ | 35.1 | | | Corporate bonds and notes | 92.4 | | | 0.1 | | | (0.6) | | | 91.9 | |
A summary of our debt securities as of December 31, 2025 is as follows (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Fair Value | | Available-for-sale debt securities: | | | | | | | | | U.S. government and agency securities | $ | 40.2 | | | $ | 0.2 | | | $ | — | | | $ | 40.4 | | | Corporate bonds and notes | 68.7 | | | 0.5 | | | (0.1) | | | 69.1 | |
Investing information related to our available-for-sale debt securities is as follows (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | | 2026 | | 2025 | | 2026 | | 2025 | | Proceeds from sales and maturities | $ | 10.8 | | | $ | 8.7 | | | $ | 21.1 | | | $ | 8.7 | |
The contractual maturities of our available-for-sale debt securities as of June 30, 2026 are as follows (in millions): | | | | | | | | | | | | | Amortized Cost | | Fair Value | | Due in one year or less | $ | 24.3 | | | $ | 24.3 | | | Due after one year through five years | 88.5 | | | 88.1 | | | Due after five years through ten years | 6.5 | | | 6.4 | | | Due after ten years | 8.3 | | | 8.2 | | | Total | $ | 127.6 | | | $ | 127.0 | |
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