v3.26.3
Goodwill and Other Intangible Assets
 9 Months Ended
Sep. 30, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Changes to goodwill during the nine months ended September 30, 2026 were as follows:
(thousands of U.S. dollars)SterigenicsNordionNelson LabsTotal
Goodwill at December 31, 2025$658,919 $267,771 $176,542 $1,103,232 
Changes due to foreign currency exchange rates(1,551)(9,238)(1,226)(12,015)
Goodwill at September 30, 2026$657,368 $258,533 $175,316 $1,091,217 
Other intangible assets consisted of the following:
(thousands of U.S. dollars)
Gross Carrying
Amount
Accumulated
Amortization
As of September 30, 2026
Finite-lived intangible assets
Customer relationships$165,561 $91,663 
Proprietary technology36,470 19,975 
Trade names2,400 2,360 
Land-use rights9,246 2,584 
Sealed source and supply agreements162,876 94,452 
Other600 590 
Total finite-lived intangible assets377,153 211,624 
Indefinite-lived intangible assets
Regulatory licenses and other(a)
73,421 — 
Trade names / trademarks25,887 — 
Total indefinite-lived intangible assets99,308 — 
Total$476,461 $211,624 
As of December 31, 2025
Gross Carrying
Amount
Accumulated
Amortization
Finite-lived intangible assets
Customer relationships$167,313 $84,083 
Proprietary technology37,775 19,253 
Trade names2,400 2,000 
Land-use rights8,861 2,313 
Sealed source and supply agreements168,740 91,405 
Other900 790 
Total finite-lived intangible assets385,989 199,844 
Indefinite-lived intangible assets
Regulatory licenses and other(a)
76,064 — 
Trade names / trademarks26,018 — 
Total indefinite-lived intangible assets102,082 — 
Total$488,071 $199,844 
(a)Includes certain transportation certifications, a class 1B nuclear license and other intangible assets related to obtaining such licensure. These assets are considered indefinite-lived as the decision for renewal by the Canadian Nuclear Safety Commission (“CNSC”) is primarily based on a licensee’s previous assessments, reported incidents, and annual compliance and inspection results. New applications for a license can take a significant amount of time and cost; whereas an existing
licensee with a historical record of compliance and current operating conditions is generally expected to obtain renewal, as Nordion has demonstrated over its 75-year history. In September 2025, the CNSC renewed Nordion’s Class 1B nuclear license for a 25-year term.
Amounts include the impact of foreign currency translation. Fully amortized amounts are written off.
Amortization expense for finite-lived intangible assets was $5.5 million and $5.7 million for the three months ended September 30, 2026 and 2025, respectively. $3.0 million and $3.1 million were included in “Amortization of intangible assets” in the Consolidated Statements of Operations and Comprehensive Income for the three months ended September 30, 2026 and 2025, respectively, whereas the remainder was included in “Cost of revenues.”
Amortization expense for finite-lived intangible assets was $16.7 million and $36.2 million for the nine months ended September 30, 2026 and 2025, respectively. $9.1 million and $27.7 million were included in “Amortization of intangible assets” in the Consolidated Statements of Operations and Comprehensive Income for the nine months ended September 30, 2026 and 2025, respectively, whereas the remainder was included in “Cost of revenues.”
The estimated aggregate amortization expense for finite-lived intangible assets for each of the next five years and thereafter is as follows:
(thousands of U.S. dollars)
For the remainder of 2026$5,422 
202720,623 
202820,076 
202919,966 
203019,966 
Thereafter79,476 
Total$165,529