v3.26.1
BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)
 6 Months Ended
Mar. 27, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation
Basis of Presentation — The accompanying unaudited condensed consolidated financial statements of the Company included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). These unaudited condensed consolidated financial statements have been prepared in accordance with the Company’s accounting policies and on the same basis as those consolidated financial statements included in the Company’s latest Annual Report on Form 10-K for the year ended September 30, 2025, filed with the U.S. Securities and Exchange Commission (the “SEC”) on November 26, 2025, and should be read in conjunction with those consolidated financial statements and the notes thereto. Certain information and disclosures normally included in the Company’s annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC.
    
The unaudited condensed consolidated financial statements include the assets and liabilities used in operating the Company’s business. All intercompany balances and transactions have been eliminated in consolidation. The results of companies acquired or disposed of are included in the unaudited condensed consolidated financial statements from the effective date of acquisition or up to the date of disposal.
    
These statements include all adjustments (consisting of normal recurring adjustments) that the Company considered necessary to present a fair statement of its results of operations, financial position and cash flows. The results reported in these unaudited condensed consolidated financial statements should not be regarded as necessarily indicative of results that may be expected for the entire year.
Fiscal Periods
Fiscal Periods — The Company has a fiscal year that ends on September 30. The Company’s fiscal quarters typically end on the last Friday in December, March and June as it follows a 4-5-4 calendar.
Use of Estimates
Use of Estimates — The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclose contingent assets and liabilities at the date of the condensed consolidated financial statements and report the associated amounts of revenues and expenses. Actual results could differ materially from these estimates.
Recent Accounting Pronouncements
Recent Accounting Pronouncements

A summary of recently adopted accounting guidance is as follows. Adoption dates are on the first day of the fiscal year indicated below, unless otherwise specified.
ASUDescription of ASUImpact to AtkoreAdoption Date
2023-09 Income Taxes (Topic 740); Improvements to Income Tax DisclosuresThe ASU requires companies to provide additional tax disclosures including specific categories in the rate reconciliations and reconciling items that meet a quantitative threshold. Additional disclosures are also required for income tax paid and the disaggregation of domestic and foreign income tax expense.The Company has adopted the standard in fiscal 2026 and will include the disclosures required by the ASU within the Income Tax Footnote of the annual report.2026
2024-03 Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)The ASU requires companies to disclose, in the notes to the financial statements, specified information about certain costs and expenses. The amendments in this update do not change or remove current expense disclosure requirements presented on the face of the income statement. However, the amendments require the disaggregation of certain expense captions into specified categories in the notes to financial statements and inclusion of certain current disclosures in the same tabular format as the other disaggregation requirements in the amendments.The Company will adopt the standard in fiscal 2028 and include the disclosures required by the ASU within the annual report and quarterly reports beginning in fiscal 2029.2028
2025-06 Intangibles - Goodwill and Other-Internal-Use Software (Subtopic 350-40); Targeted Improvements to the Accounting for Internal-Use SoftwareThis ASU requires companies to consider project stages in determining whether a software development cost for internal-use software is capitalized or expensed. The amendment requires an entity to start capitalizing software costs when management has both authorized and committed to funding the software project and when it is probable that the project will be completed and the software will be used to perform the intended function. Additionally, disclosures are required for all capitalized internal-use software costs, regardless of how those costs are presented in the financial statements in accordance with Subtopic 360-10, Property, Plant, and Equipment - Overall.The Company is still evaluating the future impact of this accounting standard.2029