LIMITED POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints each of Natalie Gassiott, Piper Erwin, David W. Garner, Kevin W. Pletcher, and Ambar Quintanilla, or any of them acting individually and with full power of substitution, the undersigned's true and lawful attorney-in-fact to:

1.
execute for and on behalf of the undersigned, in the undersigned's capacity as an officer or director or both of Simmons First National Corporation (the "Company"), Forms 3, 4 and 5 (and any amendments thereto) in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the rules thereunder; and
2.
do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendments thereto, and file such form with the U.S. Securities and Exchange Commission (the "SEC"), including without limitation the filing of a Form ID or any other documents necessary or appropriate to enable the undersigned to file the Forms 3, 4 and 5 electronically with the SEC; and
3.
take any other action in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by or for, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Limited Power of Attorney shall be in such form and shall contain such information and disclosure as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever required, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Limited Power of Attorney and the rights and powers herein granted. This Limited Power of Attorney is effective immediately and shall survive any subsequent incapacity or disability of the undersigned.

The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of and on the behalf of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with, or any liability for the failure to comply with, any provision of Section 16 of the Exchange Act.

This Limited Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 or 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing.

This Limited Power of Attorney supersedes any power of attorney previously executed by the undersigned regarding the purposes outlined in the first and second paragraph hereof (“Prior Powers of Attorney”), and the authority of the attorneys-in-fact named in any Prior Powers of Attorney is hereby revoked.

IN WITNESS WHEREOF, the undersigned has executed this Limited Power of Attorney as of this 12th day of November, .2024.

 

Signed and acknowledged:

/s/ Christopher J. Van Steenberg

Signature

 

Christopher J. Van Steenberg

Printed Name

 

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