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Goodwill and Intangible Assets, net
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets, net Goodwill and Intangible Assets, net
Goodwill
A summary of the activity impacting goodwill is presented below (in thousands):
Balance as of December 31, 2024
$416,821 
Adjustment
— 
Balance as of September 30, 2025
$416,821 
Intangible Assets, net
Our acquired intangible assets are amortized using the straight-line method over their estimated useful lives of seven to ten years. The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of September 30, 2025 (in thousands).
Weighted Average Useful Life (in years)
Gross Carrying ValueAccumulated AmortizationNet Carrying Value
Auto-Injector technology platform
7$402,000 $192,663 $209,337 
XYOSTED proprietary product10136,200 45,693 90,507 
Total finite-lived intangibles, net
$538,200 $238,356 $299,844 
ATRS-1902 (IPR&D)Indefinite48,700 
Total intangibles, net$348,544 
Estimated future annual amortization of finite-lived intangible assets is shown in the following table (in thousands). Actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors.

YearAmortization Expense
Remainder of 2025
$17,763 
2026
71,049 
2027
71,049 
2028
71,049 
2029
36,313 
Thereafter32,621 
Total$299,844