v3.26.1
Intangible assets
 3 Months Ended
Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible assets Intangible assets
The carrying amount of intangible assets as of March 31, 2026 and December 31, 2025 is as follows:

March 31,
2026		December 31,
2025
(in thousands)
Cost
Customer relationships$4,133,727 $4,134,478 
Order backlog545,727 546,054 
Trade names & brands204,700 204,721 
Patient database170,484 170,511 
Technology assets151,582 151,754 
Total cost5,206,220 5,207,518 
Accumulated amortization(2,009,516)(1,873,663)
Impairment— (86,737)
Net book value$3,196,704 $3,247,118 

In the three months ended March 31, 2026, the amortization expense recognized by the Company was $50.3 million (three months ended March 31, 2025: $58.9 million).

There were no additions to intangible assets during the three months ended March 31, 2026.