DIODES INC /DEL/

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of

Diodes Incorporated

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Diodes Incorporated (the “Company”) as of December 31, 2025 and 2024, the related consolidated statements of income, comprehensive income, equity and cash flows for each of the three years in the period ended December 31 2025, and the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company’s internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of the Company as of December 31, 2025 and 2024, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control - Integrated Framework (2013)issued by COSO.

Basis for Opinions

The Company’s management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management Report on Internal Control over Financial Reporting included in Item 9A. Our responsibility is to express an opinion on the Company’s consolidated financial statements and an opinion on the Company’s internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether theconsolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Revenue – Ship and Debit Reserve

As described in Note 1, the Company records reserves related to estimated customer incentives, such as “ship and debit”, which arise when the Company, from time to time based on market conditions, issues credits to certain distributors upon shipments to end customers. The ship and debit reserve comprehends both claims in process and anticipated claims arising from the eventual sale of distributor inventory that is subject to claim activity. The Company performs a look-back analysis of revenues and credits issued to distributors. Using the look-back analysis, the Company adjusts assumptions and estimated reserves each quarter. The resulting ship and debit reserve is recorded within the $255.6 million reduction to 2025 net sales with a corresponding reduction to accounts receivable.

Estimating the ship and debit reserve involves the application of models which require management to make certain assumptions including historical customer ship and debit credit rates and credit lag times on such revenues. These assumptions could be affected by current and future economic and market conditions. We identified the ship and debit reserve as a critical audit matter because auditing management’s estimate of the ship and debit reserve was complex and judgmental due to significant estimation required by management.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included evaluating the design and testing the operating effectiveness of internal controls related to the Company’s ship and debit reserve, including testing management’s review of the reserve calculation and the underlying assumption used to develop the estimate. Our audit procedures related to the identification and testing of significant assumptions used in the estimate included the following, among others:

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Testing management’s process to develop the estimate for the ship and debit reserve, including:

o

Evaluating the reasonableness of management’s assumptions by comparing the significant assumptions (ship and debit claims percentages history and the relevant cycle time period between when sales are made by distributors to their end customers and when ship and debit credit memos are issued by the Company to distributors) used to historical trends, including testing the completeness and accuracy of the underlying data.

o

Vouching revenues and ship and debit credits to supporting documentation.

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Confirming point of sales data used within management’s reserve calculation with a sample of distributors to validate data fields.

o

Performing sensitivity analyses on the significant assumptions (ship and debit claims percentage history and the relevant cycle time period between when sales are made by distributors to their end customers and when ship and debit credit memos are issued by the Company to distributors) to evaluate the potential changes in the ship and debit reserve that would result from changes in the assumptions.

/s/Baker Tilly US, LLP

Irvine, California

February 10, 2026

We have served as the Company’s auditor since 1993.