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PROPERTY, PLANT AND EQUIPMENT, NET
 6 Months Ended
Jun. 28, 2025
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET PROPERTY, PLANT AND EQUIPMENT, NET
The composition of property, plant and equipment, net is as follows:
June 28, 2025December 28, 2024
(in thousands)
Land$72,118 $71,736 
Buildings (1)
1,082,601 1,069,667 
Machinery and equipment (1)
1,061,968 1,029,424 
Leasehold improvements432,857 438,746 
Furniture and fixtures27,780 30,413 
Computer hardware and software (1)
277,368 268,032 
Vehicles (1)
7,234 6,800 
Construction in progress141,196 143,306 
Total3,103,122 3,058,124 
Less: Accumulated depreciation(1,496,389)(1,454,110)
Property, plant and equipment, net$1,606,733 $1,604,014 
(1) These balances include assets under finance leases.
As of June 28, 2025, the Company included approximately $20 million of certain property, plant and equipment primarily related to corporate assets as held for sale within other assets on the unaudited condensed consolidated balance sheets.
Depreciation expense in the three months ended June 28, 2025 and June 29, 2024 was $44.3 million and $47.6 million, respectively. Depreciation expense in the six months ended June 28, 2025 and June 29, 2024 was $87.7 million and $93.3 million, respectively.
Change in estimated useful lives
In accordance with its policy, the Company reviews the estimated useful lives of its property, plant and equipment on an ongoing basis. This review indicated that the actual lives of certain assets were longer than the estimated useful lives used for depreciation purposes in the Company’s financial reporting. As a result, effective December 29, 2024, the first day of fiscal 2025, the Company changed certain estimates of the useful lives to better reflect the estimated periods during which these assets will remain in service. The estimated useful lives of machinery and equipment, which was previously 5 years increased to 7 years, and building improvements that was previously 10 years increased to 15 years. The effect of this change in estimate during the three and six months ended June 28, 2025 reduced depreciation expense by $4.5 million and $9.0 million, increased net income available to Charles River Laboratories International, Inc. common shareholders by $3.4 million and $6.9 million and increased basic and diluted earnings per share by approximately $0.07 and $0.14, respectively.