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GOODWILL AND INTANGIBLE ASSETS
 9 Months Ended
Sep. 27, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS
Goodwill
The following table provides a rollforward of the Company’s goodwill:
RMS
DSA (1)
Manufacturing (2)
Total
(in thousands)
December 28, 2024$496,740 $1,635,651 $714,217 $2,846,608 
Divestitures— (4,000)— (4,000)
Foreign exchange13,565 41,962 24,146 79,673 
September 27, 2025$510,305 $1,673,613 $738,363 $2,922,281 
(1) DSA includes accumulated impairment losses of $1 billion, which were recognized in fiscal years 2008 and 2010.
(2) Manufacturing includes an accumulated impairment loss of $215 million, which was recognized in fiscal year 2024.
As of the beginning of fiscal 2025, the Company has combined the Discovery Services and Safety Assessment reporting units into a single reporting unit consistent with recent changes to the DSA integrated operating structure.
The increase in goodwill during the nine months ended September 27, 2025 is primarily related to the effect of foreign exchange; partially offset by a divestiture of a site in the DSA reportable segment.
Intangible Assets, Net
The following table displays intangible assets, net by major class:
 September 27, 2025December 28, 2024
GrossAccumulated AmortizationNetGrossAccumulated AmortizationNet
(in thousands)
Client relationships$1,528,202 $(992,424)$535,778 $1,505,871 $(823,903)$681,968 
Technology141,307 (122,329)18,978 139,335 (116,536)22,799 
Trademarks and trade names12,100 (6,673)5,427 11,827 (5,630)6,197 
Other21,029 (10,118)10,911 39,819 (27,383)12,436 
Intangible assets$1,702,638 $(1,131,544)$571,094 $1,696,852 $(973,452)$723,400 
The decrease in intangible assets for the nine months ended September 27, 2025 related primarily to the accelerated amortization of certain CDMO client relationships in the Biologics Solutions reporting unit, normal amortization over the useful lives, and a divestiture of a site in the DSA reportable segment.
Amortization expense of definite-lived intangible assets for three months ended September 27, 2025 and September 28, 2024 was $27.4 million and $32.4 million, respectively. Amortization expense of definite-lived intangible assets for nine months ended September 27, 2025 and September 28, 2024 was $158.1 million and $97.2 million, respectively. Amortization expense for the nine months ended September 27, 2025 includes $71.0 million of accelerated amortization expense as a result of a decrease in the remaining useful life of certain client relationships due to a loss of key customers in 2025 which was identified in fiscal year 2024.