ALLEGRO MICROSYSTEMS INC

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Allegro MicroSystems, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Allegro MicroSystems, Inc. and its subsidiaries (the “Company”) as of March 29, 2024 and March 31, 2023, and the related consolidated statements of operations, of comprehensive income, of changes in stockholders’ equity and of cash flows for the years then ended, including 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 March 29, 2024, 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 financial position of the Company as of March 29, 2024 and March 31, 2023, and the results of its operations and its cash flows for the years then ended 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 March 29, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the 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 Management’s Annual Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and 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 the consolidated 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 that 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 (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) 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 (iii) 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 Matters

The critical audit matters communicated below are matters arising from the current period audit of the consolidated financial statements that were communicated or required to be communicated to the audit committee and that (i) relate to accounts or disclosures that are material to the consolidated financial statements and (ii) 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 matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Revenue Recognition – Sales Allowance

As described in Notes 2 and 4 to the consolidated financial statements, variable consideration, such as sales allowances, includes sales in which the amount of consideration that the Company will receive is unknown as of the end of the reporting period. Such consideration primarily includes limited price protection provisions provided to distributors, sales under agreements that allow rights of return, referred to as stock rotation, provided to distributors, discounts and credits provided to distributors and returns provisions offered to direct customers, which make up a portion of total net sales of $1.0 billion for the year ended March 29, 2024. The liability for returns and sales allowances was $44.8 million as of March 29, 2024, of which a significant portion relates to a certain sales allowance program. Management estimates potential future returns, credits and sales allowances based on historical data from prior sales returns and credits issued and changes in product sales to customers.

The principal considerations for our determination that performing procedures relating to revenue recognition - sales allowance is a critical audit matter are a high degree of auditor effort in performing procedures and evaluating audit evidence related to the sales allowance and the liability related to the sales allowance transactions.

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 testing the effectiveness of controls relating to a certain sales allowance program, including controls over the sales allowance and the liability related to the sales allowance transactions. These procedures also included, among others, testing the completeness, accuracy, and occurrence of a sample of sales allowance and the liability related to the sales allowance transactions by obtaining and inspecting source documents, including invoices and invoice credits related to the sales allowance program, and customer arrangements or promotional practices, where applicable.

Acquisition of Crocus Technology International Corp. - Valuation of Completed Technology

As described in Note 3 to the consolidated financial statements, on October 31, 2023, the Company completed the acquisition of Crocus Technology International Corp. (“Crocus”) for $412.3 million in cash, subject to a working capital adjustment. Of the acquired intangible assets, $234.0 million of completed technology was recorded. Management applied the multi-period excess earnings method under the income approach to estimate the fair value of the completed technology asset. The fair value of intangible assets was based on estimates and assumptions developed by management, including estimating future cash flows relating to revenue growth rates, operating margins, discount rates, and technology obsolescence curves.

The principal considerations for our determination that performing procedures relating to the valuation of completed technology acquired in the acquisition of Crocus is a critical audit matter are (i) the significant judgment by management when developing the fair value estimate of the completed technology acquired; (ii) a high degree of auditor judgment, subjectivity, and effort in performing procedures and evaluating management’s significant assumptions related to revenue growth rates, operating margins, discount rate, and technology obsolescence curve; and (iii) the audit effort involved the use of professionals with specialized skill and knowledge.

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 testing the effectiveness of controls relating to the acquisition accounting, including controls over management’s valuation of the completed technology acquired. These procedures also included, among others (i) reading the purchase agreement; (ii) testing management’s process for developing the fair value estimate of the completed technology acquired; (iii) evaluating the appropriateness of the multi-period excess earnings method used by management; (iv) testing the completeness and accuracy of the underlying data used in the multi-period excess earnings method; and (v) evaluating the reasonableness of the significant assumptions used by management related to revenue growth rates, operating margins, discount rate, and technology obsolescence curve. Evaluating management’s assumptions related to revenue growth rates and operating margins involved considering (i) the current and past performance of the Crocus business; (ii) the consistency with external market and industry data; and (iii) whether the assumptions were consistent with evidence obtained in other areas of the audit. Professionals with specialized skill and knowledge were used to assist in evaluating (i) the appropriateness of the multi-period excess earnings method and (ii) the reasonableness of the discount rate and technology obsolescence curve assumptions.

/s/PricewaterhouseCoopers LLP

Boston, Massachusetts

May 23, 2024

We have served as the Company’s auditor since 2022.