AMTECH SYSTEMS INC New Standards Disclosure

Recently Issued Accounting Pronouncements

In November 2024, the FASB issued ASU 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses” (“ASU 2023-07”), which requires disclosure of additional information about specific expense categories underlying certain income statement expense line items. This ASU is effective for our annual periods beginning October 1, 2027, and interim periods beginning October 1, 2028, and requires either prospective or retrospective application. We are currently evaluating the impact of this ASU on our disclosures.

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”), which requires additional annual income tax disclosures. These include a tabular rate reconciliation comprised of eight specific categories, the disaggregation of income taxes paid between federal, state, and foreign jurisdictions, and to disaggregate income from continuing operations before income tax expense and income tax expense from continuing operations between domestic and foreign. ASU 2023-09 eliminates the disclosure of the nature and estimate of reasonably possible changes to unrecognized tax benefits in the next 12 months or that an estimated range cannot be made. ASU 2023-09 is effective for fiscal years beginning on or after December 15, 2024, with early adoption permitted, and can be applied on a prospective or retrospective basis. We are currently evaluating the impact of this ASU on our disclosures.

In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” (“ASU 2023-07”), which improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The ASU is effective for public business entities for fiscal years beginning after December 15, 2023, and for interim reporting periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments in ASU 2023-07 should be applied retrospectively to all prior periods presented in the financial statements. We adopted ASU 2023-07 in our Form 10-K for the year ended September 30, 2025. The adoption of this guidance impacted our disclosures only and did not have a material impact. See Note 15 "Reportable Segments" for more information.

There were no other new accounting pronouncements issued or effective as of September 30, 2025 that had or are expected to have a material impact on our consolidated financial statements.