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Segment Information
 3 Months Ended
Mar. 31, 2025
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Segment Information SEGMENT INFORMATION
Gross profit is the Company’s measure for segment reporting. There were no intersegment sales in the periods presented. Refer to Note 2, Revenue and Contracts with Customers, for additional details on revenue for each segment. The following table presents the Company’s segment information (in millions):

 Three Months Ended 
 March 31,
20252024
Revenue
LEU segment:
Separative work units$51.3 $23.6 
Uranium— — 
Total51.3 23.6 
Technical Solutions segment21.8 20.1 
Total revenue$73.1 $43.7 
Cost of Sales
LEU segment:
Separative work units and uranium
$20.1 $23.1 
Total20.1 23.1 
Technical Solutions segment
20.1 16.3 
Total cost of sales
$40.2 $39.4 
Segment Gross Profit
LEU segment$31.2 $0.5 
Technical Solutions segment1.7 3.8 
Gross profit$32.9 $4.3 
Reconciliation to Income before income taxes
Advanced technology costs$3.0 $5.7 
Selling, general and administrative8.3 8.1 
Amortization of intangible assets1.1 1.1 
Nonoperating components of net periodic benefit loss0.9 0.1 
Interest expense3.4 0.4 
Investment income(7.3)(2.8)
Extinguishment of long-term debt(11.8)— 
Other expense, net0.1 0.1 
Income (loss) before income taxes$35.2 $(8.4)

The Company’s total assets are not presented for each reportable segment as they are not reviewed by, nor otherwise regularly provided to the chief operating decision maker (“CODM”), the CEO. The CODM uses revenue, cost of sales and gross profit to allocate resources (including personnel and financial or capital resources) for each segment, predominantly in the annual budget and quarterly financial review and forecasting process. The CODM considers budget-to-actual variances on a quarterly basis using revenue, cost of sale and gross profit when making decisions about allocating capital and personnel to the segments. Centrus’ long-term or long-lived assets, which include property, plant and equipment and other assets reported on the Consolidated Balance Sheet, were located in the United States as of March 31, 2025 and December 31, 2024.
Revenue from Major Customers (10% or More of Total Revenue)

In the three months ended March 31, 2025, one customer in the LEU segment individually represented $47.6 million of revenue and one customer in the Technical Solutions segment individually represented $21.7 million of revenue.
In the three months ended March 31, 2024, one customer in the LEU segment individually represented $18.9 million of revenue and one customer in the Technical Solutions segment individually represented $19.8 million of revenue.