NEOGEN CORP

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d[1]15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) that are designed to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and (ii) accumulated and communicated to the Company’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of May 31, 2025, was carried out under the supervision and with the participation of the Company’s management, including the President & Chief Executive Officer and Chief Financial Officer (“the Certifying Officers”), using the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control – Integrated Framework (2013). Based on the evaluation, the Certifying Officers concluded that the Company’s disclosure controls and procedures were not effective as of such date due to material weaknesses in internal control over financial reporting, referenced below.

Management’s Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13-a-15(f) and 15d-15(f). Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. GAAP and includes those policies and procedures that: (1) pertain to the maintenance of records that in reasonable detail accurately and fairly reflect our transactions and the dispositions of our assets; (2) provide reasonable assurance that our transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles and that our receipts and expenditures are being made only in accordance with appropriate authorizations; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our consolidated financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness for 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.

Under the supervision of and with the participation of our management, including the Chief Executive Officer, Chief Financial Officer and the Chief Accounting Officer, we assessed the effectiveness of our internal control over financial reporting as of May 31, 2025, using the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control—Integrated Framework (2013). The objective of this assessment was to determine whether our internal control over financial reporting was effective as of May 31, 2025. Based on management’s assessment, we have concluded that our internal control over financial reporting was ineffective as of May 31, 2025, due to the material weaknesses relating to our control activities as well as the related information and communication processes described below.

Material Weakness

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our financial statements will not be prevented or detected on a timely basis.

Remediation of Previously Identified Material Weaknesses

Management's assessment of the Company’s internal control over financial reporting identified the following material weaknesses that existed as of May 31, 2023 and 2024. As of May 31, 2025, management believes our remediation efforts have been effective with respect to these material weaknesses and that the associated controls are now effective as of May 31, 2025:

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A material weakness in internal control related to ineffective information technology general controls (ITGCs) in the areas of user access and change management over certain information technology (IT) systems that support the Company’s financial reporting processes. Specifically, we did not design and maintain: (i) sufficient logical access controls to ensure appropriate segregation of duties and adequately restrict user and privileged access to financial applications, programs and data to appropriate Company personnel; (ii) program change management controls to ensure that information technology program and data changes affecting financial information technology applications and underlying accounting records are identified, tested, authorized and implemented appropriately. As a result, manual business process controls that are dependent on the affected ITGCs were also deemed ineffective, because they could have been adversely impacted to the extent that they rely upon information and configurations from the affected IT systems.

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A material weakness in internal controls related to controls over period-end invoice accruals that are designed to ensure the completeness and accuracy of accrued expenses and accrued capital assets.

In fiscal year 2025, we implemented measures designed to improve internal control over financial reporting to remediate the controls that led to the material weaknesses described above. Such remediation measures included:

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We hired additional accounting and information technology resources with the required technical expertise and clearly defined roles and responsibilities;

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We enhanced the overall identification and review process relating to invoices to be accrued for to ensure the completeness and accuracy of accrued expenses and capital assets;

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We enhanced our processes to evaluate, monitor and approve user access reviews and change management controls;

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We conducted additional training on the Company’s enhanced invoice accrual, user access review and change management controls.

Identified Material Weaknesses

As a result of management’s assessment of the Company’s internal control over financial reporting, we have concluded that as of May 31, 2025, the Company had deficiencies in the control activities and information and communication components of the COSO Framework that constitute material weaknesses, either individually or in aggregate.

Control Activities

We did not design, implement, and/or operate effective control activities, across substantially all of the Company’s business and financial reporting processes to adequately achieve complete and accurate financial accounting, reporting, and disclosures based on the criteria established in the COSO Framework and we identified deficiencies in the principles associated with the control activities component of the COSO

Framework. The following items contributed to the material weakness in control activities, either individually or in aggregate:

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Management did not maintain effective management review controls to adequately support certain assumptions applied in its goodwill valuation analysis.

Information and Communication

We did not consistently generate or provide adequate quality supporting information and communication based on the criteria established in the COSO Framework and we identified deficiencies in the principles associated with the information and communication component of the COSO Framework. The following were contributing factors to the material weakness in information and communication:

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Management did not consistently retain information and documentation to adequately support the functions of internal control, including controls over information produced by the entity used in connection with control activities.

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Management did not adequately communicate information internally to enable personnel to sufficiently understand internal control responsibilities.

These control deficiencies create a reasonable possibility that a material misstatement to the consolidated financial statements would not be prevented or detected on a timely basis, and therefore, we concluded that the deficiencies represent material weaknesses. As a result of these material weaknesses, management has concluded that our internal control over financial reporting was not effective as of May 31, 2025.

However, after giving full consideration to these material weaknesses, and the additional analyses and other procedures that we performed to ensure that our consolidated financial statements were prepared in accordance with US GAAP, we have concluded that our consolidated financial statements present fairly, in all material respects, our financial position, results of operations and cash flows for the periods disclosed in conformity with US GAAP.

The Company’s independent registered public accounting firm, BDO USA, P.C., which has audited and reported on our consolidated financial statements, issued an attestation report on the effectiveness of the Company’s internal control over financial reporting as of May 31, 2025, which is included in this annual report below.

Ongoing Remediation Efforts

Management continues to implement and evaluate measures designed to remediate control deficiencies and enhance the overall internal control environment. These actions are intended to ensure that internal controls are properly designed, effectively implemented, and reliably operated. Our ongoing and prospective initiatives include:

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Enhancing the design, implementation, and execution of existing control activities, while developing new controls as needed to address identified risks;

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Enhancing internal controls documentation, including the retention of adequate documentary evidence to demonstrate precision in review procedures and the effective operation of management review controls;

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Expanding and formalizing entity-level controls and policies to respond to evolving risks, ensure proper communication and information flow, and promote accountability;

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Developing and deploying document retention protocols aligned with internal control requirements, also planned for implementation in the first quarter of fiscal year 2026;

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Providing training and ongoing education to control owners on the principles of the COSO Internal Control – Integrated Framework (2013), and reinforcing a culture of compliance and accountability; and

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Hiring and retaining qualified personnel and external resources to support enhanced control ownership, including the appointment of a dedicated Director of Internal Controls.

Changes in Internal Control over Financial Reporting

Other than with respect to the remediation efforts in connection with the material weaknesses described above, no changes in our internal control over financial reporting were identified as having occurred during the fourth quarter of fiscal year 2025 that have materially affected, or are reasonably likely to materially affect, internal control over financial reporting.

Shareholders and Board of Directors

Lansing, Michigan

Opinion on Internal Control over Financial Reporting

We have audited Neogen Corporation’s (the “Company’s”) internal control over financial reporting as of May 31, 2025, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (the “COSO criteria”). In our opinion, the Company did not maintain, in all material respects, effective internal control over financial reporting as of May 31, 2025, based on the COSO criteria. We do not express an opinion or any other form of assurance on management’s statements referring to any corrective actions taken by the Company after the date of management’s assessment.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated balance sheets of the Company as of May 31, 2025 and 2024, the related consolidated statements of operations, comprehensive (loss) income, stockholders’ equity, and cash flows for each of the three years in the period ended May 31, 2025, and the related notes (collectively referred to as “the financial statements”) and our report dated July 30, 2025 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible 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 Item 9A, Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit of internal control over financial reporting in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit 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 audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company’s annual or interim financial statements will not be prevented or detected on a timely basis. Material weaknesses were identified regarding management’s failure to design and maintain controls (i) to adequately achieve complete and accurate financial accounting, reporting and disclosures and (ii) to consistently retain information and documentation to adequately support functions of internal control or communicate information internally to personnel. These material weaknesses were considered in determining the nature, timing, and extent of audit tests applied in our audit of the 2025 consolidated financial statements, and this report does not affect our report dated July 30, 2025 on those consolidated financial statements.

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.

/s/ BDO USA, P.C.

Grand Rapids, Michigan

July 30, 2025