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Note 21. Segment and Geographical Information (Notes)
 12 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Segment and Geographical Information
21. Segment and Geographical Information

First Solar operates as one business, which involves the design, manufacture, and sale of CdTe solar modules, which convert sunlight into electricity. Third-party customers of this segment include system developers, independent power producers, utilities, commercial and industrial companies, large corporate energy buyers, and other system owners and operators. Our business is managed by our Chief Executive Officer, who is also considered our chief operating decision maker (“CODM”).

Prior to 2025, we regularly provided our CODM with financial information that included certain legacy business activities. As such activities have continued to decline in size and importance, our CODM no longer receives detailed financial information at this disaggregated level. Therefore, we currently operate as a single operating segment, and our disclosures reflect this change.

Although our CODM regularly uses gross profit for key operating decisions about allocating resources and assessing performance, we have concluded that consolidated net income is also used and is the measure of profit or loss required to be disclosed under the provisions of ASC 280 for our single operating segment. Accordingly, we considered whether there were any significant expense categories to disclose and concluded that the consolidated financial statements and accompanying notes thereto include the relevant categories regularly provided to our CODM. The measure of segment assets is reported in our consolidated balance sheets as “Total assets.”
The following table presents net sales for the years ended December 31, 2025, 2024, and 2023 by geographic region, based on the customer country of invoicing (in thousands):
 202520242023
United States$4,994,679 $3,904,844 $3,187,603 
India195,584 201,714 10,869 
France6,303 34,370 68,302 
All other foreign countries22,810 65,361 51,828 
Net sales$5,219,376 $4,206,289 $3,318,602 

The following table presents long-lived assets, which include property, plant and equipment, lease assets, and project assets as of December 31, 2025 and 2024 by geographic region, based on the physical location of the assets (in thousands):
 20252024
United States$4,392,571 $3,911,923 
Malaysia574,255 646,111 
Vietnam434,749 500,568 
India433,661 471,736 
All other foreign countries62,337 52,345 
Long-lived assets$5,897,573 $5,582,683