AMPHENOL CORP /DE/ Segments Disclosure

Note 13—Reportable Business Segments and International Operations

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The Company aligns its businesses into three reportable business segments: (i) Communications Solutions, (ii) Harsh Environment Solutions and (iii) Interconnect and Sensor Systems. This segment structure reflects (i) the manner in which the Chief Operating Decision Maker (“CODM”), who is the Company’s Chief Executive Officer, regularly assesses information for decision-making purposes, including the allocation of resources, and (ii) how the Company operates its businesses, assesses performance, and communicates results and strategy, among other items, to the Board and its stockholders. The Company has three segment managers to lead their respective reportable business segments, each reporting directly to the Chief Executive Officer. The Company organizes its reportable business segments based on the manner in which management evaluates the performance of the Company, combined with the nature of the individual business activities and the product-based solutions offered.

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The Company aligns its businesses into the following three reportable business segments:

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The accounting policies of the segments are the same as those for the Company as a whole, as described in Note 1 herein. The Company’s CODM assesses each segment’s performance and allocates resources to each of them based on a single measure of profit and loss, which is operating income as adjusted for certain corporate and other related items and before interest, stock-based compensation expense, income taxes, amortization related to certain intangible assets and other non-cash purchase accounting costs, and nonrecurring gains and losses, as outlined in the table below (we refer to this measure as segment operating income). Intersegment net sales and operating expenses have been eliminated in the computation of consolidated net sales and operating income.

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The CODM considers budget-to-actual variances in net sales and segment operating income on a quarterly basis and uses that information when making decisions about the allocation of operating and capital resources to each segment. Other than segment operating expenses (which is easily computable from the difference between net sales and segment operating income), our CODM is not regularly provided disaggregated segment level expense information as such information is not used in our CODM’s decision-making related to the allocation of operating and capital resources to our segments. The Company also incurs general corporate expenses and costs which are not allocated to the reportable business segments but have been included in “Corporate / Other” in the following tables for reconciliation purposes. Assets are reviewed by the CODM on a consolidated basis and therefore are not presented by reportable business segment.

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The following tables (i) summarize, by segment, total sales, intersegment sales and external net sales and (ii) reconcile each segment’s external net sales to their respective segment operating income, including segment operating expenses, for each of the years ended December 31, 2025, 2024 and 2023:

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Segment operating income and the reconciliation of segment operating income to consolidated income before income taxes for the years ended December 31, 2025, 2024 and 2023 are as follows:

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Depreciation and amortization expense by segment for the years ended December 31, 2025, 2024 and 2023 is as follows:

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For the year ended December 31, 2025, depreciation and amortization expense in Corporate / Other includes (i) $28.2 related to the amortization of acquired backlog resulting from the 2025 Acquisitions, which is primarily included in Acquisition-related expenses in the Consolidated Statements of Income, and (ii) $77.8 of amortization of acquisition-related inventory step-up costs associated with the Andrew acquisition, which is included in Cost of sales in the Consolidated Statements of Income, as discussed in Note 11 herein. For the year ended December 31, 2024, depreciation and amortization expense in Corporate / Other includes (i) $55.0 related to the amortization of acquired backlog resulting from the CIT acquisition, which is included in Acquisition-related expenses in the Consolidated Statements of Income, and (ii) $18.2 of amortization of acquisition-related inventory step-up costs associated with the CIT acquisition, which is included in Cost of sales in the Consolidated Statements of Income, as discussed in Note 11 herein. These expenses are reported in Corporate / Other, since they are not components in the determination of segment operating income.

Net sales by geographic area for the years ended December 31, 2025, 2024 and 2023 and long-lived assets by geographic area as of December 31 were as follows:

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Disaggregation of Net Sales

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The following tables show our net sales disaggregated into categories the Company considers meaningful to depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors for the years ended December 31, 2025, 2024 and 2023:

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Net sales by geographic area are based on the customer location to which the product is shipped. No single customer accounted for 10% or more of the Company’s net sales during the years ended December 31, 2025, 2024 and 2023. As the Company is not organized by product or group of products, it is impracticable to disclose net sales by product or group of products. For further discussion related to the Company’s policies surrounding revenue recognition, refer to Note 1 herein.