Eton Pharmaceuticals, Inc.

Procedures for Submitting Stockholder Proposals

Requirements for Stockholder Proposals to be Brought Before the Annual Meeting. Our amended and restated bylaws provide that, for nominations of persons for election to our board of directors or other proposals to be considered at an annual meeting of our stockholders, a stockholder must give written notice to our corporate secretary at Eton Pharmaceuticals, Inc., 21925 W. Field Parkway, Suite 235, Deer Park, Illinois 60010, not later than the close of business 90 days, nor earlier than the close of business 120 days, prior to the first anniversary of the date of the preceding year’s annual meeting. However, our amended and restated bylaws also provide that in the event the date of the annual meeting is more than 180 days before or more than 120 days after such anniversary date, notice must be delivered not later than the close of business on the later of the 90th day prior to such annual meeting or the 15th day following the day on which public announcement of the date of such meeting is first made. Any nomination must include all information relating to the nominee that is required to be disclosed in solicitations of proxies for election of directors in election contests or is otherwise required under Regulation 14A of the Exchange Act, the person’s written consent to be named in the Proxy Statement and to serve as a director if elected and such information as we might reasonably require to determine the eligibility of the person to serve as a director. As to other business, the notice must include a brief description of the business desired to be brought before the meeting, the reasons for conducting such business at the meeting, and any material interest of such stockholder (and the beneficial owner) in the proposal. The proposal must be a proper subject for stockholder action. In addition, to make a nomination or proposal, the stockholder must be of record at the time the notice is made and must provide certain information regarding itself (and the beneficial owner), including the name and address, as they appear on our books, of the stockholder proposing such business, the number of shares of our capital stock which are, directly or indirectly, owned beneficially or of record by the stockholder proposing such business or its affiliates or associates (as defined in Rule 12b-2 promulgated under the Exchange Act) and certain additional information.

For stockholder proposals to be brought before the 2027 Annual Meeting of Stockholders, the required notice must be received by our corporate secretary at our headquarters no earlier than February 9, 2027, and no later than March 11, 2027.

Requirements for Stockholder Proposals to be Considered for Inclusion in the Company’s Proxy Materials. In addition to the requirements stated above, any stockholder who wishes to submit a proposal for inclusion in our proxy materials must comply with Rule 14a-8 promulgated under the Exchange Act. For such proposals to be included in our proxy materials relating to our 2027 Annual Meeting of Stockholders, all applicable requirements of Rule 14a-8 must be satisfied and we must receive such proposals no later than December 26, 2026. Such proposals must be delivered to Eton Pharmaceuticals, Inc., 21925 W. Field Parkway, Suite 235, Deer Park, Illinois 60010, Attn: Corporate Secretary.