NEOGEN CORP

Shareholder Proposals and Nominations for the 2026 Annual Meeting

Shareholder proposals intended to be presented at the 2026 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 15, 2026, 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 2026 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 2026 Annual Meeting is not advanced by more than 30 days or delayed by more than 60 days from the anniversary date of the 2025 Annual Meeting, we must receive notice of an intention to introduce a nomination or other item of business at the 2026 Annual Meeting after June 25, 2026, and no later than July 25, 2026.

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 2025, 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 or officers of the Company failed to comply with the requirements of Section 16(a).

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 23, 2025. Seehttp://www.neogen.com/investor-informationfor a copy of the 2025 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

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)