v3.26.1
Intangible assets
9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible assets Intangible assets
The carrying amount of Intangible Assets as of September 30, 2025 is as follows:

September 30,
2025
(As Restated)
(in thousands)
Cost
Customer relationships$4,134,107 
Order backlog545,922 
Trade names & brands204,713 
Patient database170,487 
Technology assets151,691 
Total cost5,206,920 
Accumulated amortization(1,822,598)
Impairment(86,739)
 Net book value$3,297,583 

In the three months ended September 30, 2025, the amortization expense recognized by the Company was $58.7 million (three months ended September 30, 2024: $58.0 million).

In the nine months ended September 30, 2025, the amortization expense recognized by the Company was $176.7 million (nine months ended September 30, 2024: $291.0 million).

An impairment indicator was identified specific to the Company's Data Solutions reporting unit that indicated the carrying amount of the intangible assets in the Data Solutions reporting unit may not be recoverable. This indicator related to the Company’s revised expectations on the future performance of the reporting unit considering specific external market participant factors. As a result, the Company assessed the fair value of the intangible assets based on estimated future discounted cash flows and recorded an impairment charge of $86.7 million.

There were no additions to intangible assets during the nine months ended September 30, 2025.