FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Brogdon James M
2. Issuer Name and Ticker or Trading Symbol

SIMMONS FIRST NATIONAL CORP [ SFNC ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
EVP, CFO & Treasurer
(Last)          (First)          (Middle)

C/O SIMMONS FIRST NATIONAL CORPORATION, 501 MAIN STREET
3. Date of Earliest Transaction (MM/DD/YYYY)

4/26/2021
(Street)

PINE BLUFF, AR 71601
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

4/28/2021 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit  (1)4/26/2021  A   4121 (2)    (3) (3)Common 4121 (2)$0 4121 (2)D  

Explanation of Responses:
(1) Each Restricted Stock Unit represents a contingent right to receive one share of Simmons First National Corporation common stock.
(2) The Form 4, as originally filed, incorrectly reported a grant of 8,062 restricted stock units. The correct amount of the grant is 4,121 restricted stock units. This Form 4A corrects that amount and also includes a corrected vesting schedule for the grant, which is reflected in Footnote 3.
(3) 1,373 Restricted Stock Units vest on February 24, 2022; 1,374 Restricted Stock Units vest on February 24, 2023; and 1,374 Restricted Stock Units vest on February 24, 2024. SFNC shares will be delivered within 30 days of vesting. Events such as retirement, death, disability and other specified events in the agreement may result in earlier vesting.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Brogdon James M
C/O SIMMONS FIRST NATIONAL CORPORATION
501 MAIN STREET
PINE BLUFF, AR 71601


EVP, CFO & Treasurer

Signatures
/s/ James M. Brogdon by Piper P. Erwin5/25/2021
**Signature of Reporting PersonDate

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