Neogen Corporation

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On October 30, 2025, Neogen Corporation (the “Company”) announced the appointment of Bryan Riggsbee as Senior Vice President and Chief Financial Officer, effective November 3, 2025. Mr. Riggsbee will report directly to Mike Nassif, President and Chief Executive Officer. Mr. Riggsbee, 55, joins Neogen from bioMérieux, where he most recently served as Chief Financial Officer, North America, overseeing a $2 billion business and multiple manufacturing sites across the region. Prior to that, Mr. Riggsbee spent nearly a decade as Chief Financial Officer at Myriad Genetics, where he led the company’s finance, accounting, and investor relations functions and played a key role in expanding the company’s portfolio and partnerships, as well as supporting growth into new international markets. Earlier in his career, he held senior finance roles at Laboratory Corporation of America (LabCorp), GE, and KPMG. Mr. Riggsbee currently serves on the Board of Directors of CareDx, Inc., having been appointed in March 2024. He holds bachelor’s degrees in Political Science from the University of North Carolina at Chapel Hill and in Accounting from North Carolina State University, as well as an MBA from Northwestern University’s Kellogg School of Management. He is also a Certified Public Accountant (CPA). Compensatory Arrangements In connection with Mr. Riggsbee’s appointment, the Compensation & Talent Management Committee of the Board of Directors approved the following compensation arrangements: Base Salary: An annual base salary of $600,000. Annual Bonus: Eligible to participate in the Company’s Incentive Compensation Plan (“ICP”), with a target bonus opportunity equal to 80% of annual base salary. The ICP measures both Company financial metrics and personal performance with an opportunity between 0 - 250% of the target. For Fiscal Year 2026, Mr. Riggsbee will be eligible for the full year (no proration). Long-Term Incentive Plan: Eligible for an annual grant of equity with a target of $2,000,000 in value at grant with a composition as approved by the Compensation & Talent Management Committee. Sign-On Equity Grant: Mr. Riggsbee will receive a special, one-time equity inducement grant of $2,250,000, comprised of 50% stock options with a three-year ratable vesting schedule and 50% performance share units (“PSUs”) aligned with the Company’s FY26 PSU Plan. Sign-On Cash Award: Mr. Riggsbee will receive a one-time cash award of $250,000 to be paid by December 31, 2025, which he will be required to repay the Company if his employment terminates within one year. Relocation: Mr. Riggsbee will relocate to Michigan within twenty-four (24) months of service and will receive reasonably and customary relocation benefits, including reasonable and customary realtor fees and closing costs related to the sale of his current home and the purchase of a new home, expenses related to the movement of household goods, and two (2) house hunting trips. Mr. Riggsbee will be required to repay 100% of these relocation benefits if he terminates his service within one (1) year of relocating to Michigan and 50% if he terminates his service within two (2) years of relocating to Michigan. Health & Welfare Benefits: Mr. Riggsbee is eligible to participate in the Company’s health and welfare benefits programs on the same basis as other senior executives, including health and welfare benefits, 401(k) plan participation, and any applicable perquisites; such benefits being effective with his hire date. The foregoing description of Mr. Riggsbee’s compensation is qualified in its entirety by the terms of his offer letter, which is included as an exhibit. Mr. Riggsbee’s employment is at-will, subject to customary pre-employment conditions, including background verification and execution of Neogen’s standard Non-Disclosure, Non-Competition, and Non-Solicitation Agreement.

Item 8.01 Other Events. On October 30, 2025, Neogen issued a press release announcing the appointment of a new Chief Financial Officer. Item 9.01 Financial Statements and Exhibits. (d) Exhibits 10.1 Offer Letter between Neogen Corporation and Bryan Riggsbee dated October 24, 2025. 99.1 Press Release issued by Neogen Corporation on October 30, 2025, announcing appointment of Bryan Riggsbee as Senior Vice President and Chief Financial Officer. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document).