Expion Energy, Inc.

APPENDIX A

SECOND AMENDMENT TO THE EXPION360 INC. 2021 INCENTIVE AWARD PLAN

This Second Amendment (this “Second Plan Amendment”) to the Expion360 Inc. 2021 Incentive Award Plan (as may be amended from time to time, the “2021 Plan”) is made on July 31, 2025. Capitalized terms used herein without definition shall have the meanings ascribed to such terms in the 2021 Plan.

WHEREAS, Section 11.4 of the 2021 Plan permits the Board to amend the 2021 Plan, subject, in the case of any amendment requiring stockholder approval under Applicable Law, to approval by the Company’s stockholders;

WHEREAS, the Board desires to amend the 2021 Plan to increase the Overall Share Limit;

WHEREAS, an increase to the Overall Share Limit requires stockholder approval under Applicable Law;

WHEREAS, this Second Plan Amendment shall be submitted to the Company’s stockholders for approval, and shall become effective as of the date on which the Company’s stockholders approve such Second Plan Amendment (the “Second Amendment Effective Date”); and

WHEREAS, if the Company’s stockholders fail to approve this Plan Amendment, the 2021 Plan as in effect prior to the Amendment Effective Date shall continue in full force and effect.

NOW, THEREFORE, pursuant to Section 11.4 of the 2021 Plan, the 2021 Plan is hereby amended as follows, effective as of the Amendment Effective Date:

“Overall Share Limit” means the sum of (i) 10% of the fully diluted shares of all classes of the Company’s common stock outstanding immediately following the Public Trading Date plus (ii) any Shares that are subject to Awards that become available for issuance under the Plan pursuant to Article V plus (iii) an increase commencing on January 1, 2022 and continuing annually on the anniversary thereof through (and including) January 1, 2031, equal to the lesser of (A) 5% of the aggregate number of shares of all classes of the Company’s common stock outstanding on the last day of the immediately preceding calendar year and (B) such smaller number of Shares as determined by the Board or the Committee plus (iv) an additional 250,000 Shares as of the Amendment Effective Date, and (v) an additional 750,000 Shares as of the Second Amendment Effective Date.

“Second Amendment Effective Date” means the date the stockholders of the Company approve the amendment to the Plan proposed to such stockholders of the Company in the Company’s 2025 annual proxy statement.