
	December 31, 2025							December 31, 2024
	Remaining Weighted- Average Useful Life (In years)	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Acquired developed technologies	6.8	$	8,194,656	$	(3,765,146)	$	4,429,510	$	7,699,423	$	(2,943,728)	$	4,755,695
Manufacturing contracts	—	12,578		(12,578)		—		11,121		(11,121)		—
Trademarks	—	2,904		(2,904)		—		2,868		(2,868)		—



Total finite-lived intangible assets		$	8,210,138	$	(3,780,628)	$	4,429,510	$	7,713,412	$	(2,957,717)	$	4,755,695

The increase in the gross carrying amount of intangible assets as of December 31, 2025 compared to December 31, 2024 primarily relates to the positive impact of foreign currency translation adjustments due to the strengthening of sterling against the U.S. dollar.

The assumptions and estimates used to determine future cash flows and remaining useful lives of our intangible and other long-lived assets are complex and subjective. They can be affected by various factors, including external factors, such as industry and economic trends, and internal factors such as changes in our business strategy and our forecasts for specific product lines.

Based on finite-lived intangible assets recorded as of December 31, 2025, and assuming the underlying assets will not be impaired and that we will not change the expected lives of any other assets, future amortization expenses were estimated as follows (in thousands):


Year Ending December 31,	Estimated Amortization Expense

2026	$	683,211
2027	673,586
2028	649,535
2029	647,270
2030	586,093
Thereafter	1,189,815
Total	$	4,429,510