NEOGEN CORP

Shareholder Proposals and Nominations for the 2025 Annual Meeting

Shareholder proposals intended to be presented at the 2025 Annual Meeting of shareholders and that a shareholder would like to have included in the proxy statement and form of proxy relating to that meeting must be received by the Company at its principal executive offices at 620 Lesher Place, Lansing, Michigan 48912 for consideration no later than May 16, 2025, to be considered for inclusion in the proxy statement and form of proxy related to that meeting. Such proposals of shareholders should be made in accordance with Rule 14a-8 under the Securities Exchange Act of 1934.

Under the Company’s Bylaws, proposals of shareholders intended to be submitted to a formal vote (other than proposals to be included in our proxy statement) at the 2025 Annual Meeting may be made only by a shareholder of record who has given notice of the proposal to the Secretary of the Company at our principal executive offices no earlier than 120 days and no later than 90 days prior to the anniversary of the preceding year’s Annual Meeting; provided, however that in the event that the date of the Annual Meeting is advanced by more than 30 days or delayed by more than 60 days from such anniversary date, notice by the shareholder to be timely must be given no earlier than 120 days prior to such Annual Meeting and no later than 90 days prior to such Annual Meeting or the 10 th day following the day on which public announcement of the date of such meeting is first made by the Company. The notice must contain certain information as specified in our Bylaws. In addition, shareholders who intend to solicit proxies in support of director nominees other than the Company’s nominees must also comply with the additional requirements of Rule 14a-19(b) of the Exchange Act, to the extent applicable. Assuming that our 2025 Annual Meeting is not advanced by more than 30 days or delayed by more than 60 days from the anniversary date of the 2024 Annual Meeting, we must receive notice of an intention to introduce a nomination or other item of business at the 2025 Annual Meeting after June 26, 2025, and no later than July 26, 2025.

Delinquent Section 16(a) Reports

Section 16(a) of the Exchange Act requires directors, certain specified officers, and beneficial owners of more than 10% of the Company’s common stock to file reports with respect to changes in their beneficial ownership of common stock. During fiscal 2024, based solely on review of the insiders' forms filed with the SEC during the fiscal year and written representations made by the directors and officers, none of the directors, officers, or 10% shareholders of the Company failed to comply with the requirements of Section 16(a), except as follows: There were late Form 4's filed on behalf of our NEO's and directors related to their annual grant of stock options and RSU awards. The Form 4's were filed on the third business day subsequent to the grants.

Other Actions

At this time, no other matter other than those referred to above is known to be brought before the Annual Meeting. If any additional matter(s) should properly come before the Annual Meeting, it is the intention of the persons named in the enclosed proxy to vote said proxy in accordance with their judgment on such matter(s).

Notice of Internet Availability of Proxy Materials

Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to be held on October 24, 2024. Seehttp://www.neogen.com/en/investor-informationfor a copy of the 2024 Proxy Statement and Annual Report.

Householding of Annual Meeting Materials

Some banks, brokers, and other nominee record holders may be participating in the practice of “householding” proxy statements and annual reports. This means that only one copy of this Proxy Statement may have been sent to multiple shareholders in your household. If you would prefer to receive separate copies of our Proxy Statement or the Annual Report on Form 10-K either now or in the future, please contact your bank, broker or other nominee.

Expenses of Solicitation

The cost of solicitation of proxies for the Annual Meeting is being paid by the Company. In addition to solicitation by mail, proxies may be solicited by officers, directors and regular employees of the Company personally, by telephone or other means of communication. The Company will, upon request, reimburse brokers and other nominees for their reasonable expenses in forwarding the proxy material to the beneficial owners of the stock held in street name by such persons.

By Order of the Board,

Amy M. Rocklin

Corporate Secretary

NEOGEN CORPORATION NEOGEN CORPORATION ATTN: AMY M. ROCKLIN 620 LESHER PLACE LANSING, MI 48912 SCAN TO VIEW MATERIALS & VOTE VOTE BY INTERNET Before The Meeting - Go to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 p.m. Eastern Time on October 23, 2024 for shares held directly and by 11:59 p.m. Eastern Time on October 21, 2024 for shares held in a Plan. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. During The Meeting - Go to www.virtualshareholdermeeting.com/NEOG2024 You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VOTE BY PHONE - 1-800-690-6903 Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 p.m. Eastern Time on October 23, 2024 for shares held directly and by 11:59 p.m. Eastern Time on October 21, 2024 for shares held in a Plan. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: V55702-P16651 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY NEOGEN CORPORATION For All Withhold All For All Except To withhold authority to vote for any individual nominee(s), mark "For All Except" and write the number(s) of the nominee(s) on the line below. The Board of Directors recommends you vote FOR the listed nominees: 1. Election of Directors Nominees: 01) James C. Borel 02) Jeffrey D. Capello 03) Ronald D. Green, Ph.D. The Board of Directors recommends you vote FOR the following proposals 2 and 3: For Against Abstain 2. To Approve, On An Advisory Basis, The Compensation of Named Executive Officers. 3. Ratification of Appointment of BDO USA P.C. as the Company’s Independent Registered Public Accounting Firm. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Annual Report are available atwww.proxyvote.com. V55703-P16651 PROXY NEOGEN CORPORATION ANNUAL MEETING OF SHAREHOLDERS - OCTOBER 24, 2024 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS The undersigned hereby appoints Amy M. Rocklin, with full power to appoint her substitutes, attorney and proxy to represent the shareholder and to vote and act with respect to all shares that the shareholder would be entitled to vote on all matters which come before the Annual Meeting of Shareholders of Neogen Corporation to be held at 10:00 AM, ET on October 24, 2024, virtually at www.virtualshareholdermeeting.com/NEOG2024, referred to above and at any adjournment of that meeting. THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS. IF THIS PROXY IS PROPERLY EXECUTED, THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS SPECIFIED. IF NO SPECIFICATIONS ARE MADE, THE SHARES WILL BE VOTED FOR PROPOSALS 1 THROUGH 3 ON THIS PROXY. THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED IN THE DISCRETION OF THE PROXY HOLDERS ON ANY MATTER NOT OTHERWISE COVERED HEREBY, INCLUDING SUBSTITUTION OF DIRECTOR NOMINEES, WHICH MAY COME BEFORE THE MEETING. (Continued and to be signed on reverse side)