| Accounts Payable and Accrued Liabilities |
8. Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities consist of the following (in thousands): | | | | | | | | | | | | | As of | | June 30, 2026 | | December 31, 2025 | | Accounts payable and other accrued operating expenses | $ | 74,555 | | | $ | 79,907 | | | Accrued clinical trial expenses | 34,443 | | | 34,329 | | | Accrued professional fees | 25,014 | | | 23,658 | | | Accrued technical operation expenses | 21,730 | | | 22,533 | | | | | | | Accrued compensation and employee related costs | 61,579 | | | 111,514 | | | Accrued royalty and milestones payable | 37,774 | | | 17,101 | | | | | | | Revenue Interest Payments payable | 7,553 | | | 6,449 | | | Accrued sales allowances and related costs | 146,373 | | | 70,869 | | | Accrued French rebate payable | 9,062 | | | 6,960 | | | Contingent consideration | — | | | 57,799 | | | | | | | | | | | Accrued milestone payment to AstraZeneca | — | | | 15,000 | | | Other accrued liabilities | 10,846 | | | 9,941 | | | $ | 428,929 | | | $ | 456,060 | |
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