Exhibit 31.4
CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER
PURSUANT TO RULES 13a-14(a) AND 15d-14(a)
OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED,
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Shawna Bowin, certify that:
- I have reviewed this Amendment No. 1 on Form 10-K/A to the Annual Report on Form 10-K of Expion360 Inc.; and
- Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
| Date: April 30, 2026 | /s/ Shawna Bowin |
| Shawna Bowin Chief Financial Officer (Principal Financial and Accounting Officer) |