SFNC director gains shares via RSU vesting, new grant

SIMMONS FIRST NATIONAL CORP director Marty Casteel reported equity compensation activity involving restricted stock units and common shares.

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Form Type

Rhea-AI Filing Summary

SIMMONS FIRST NATIONAL CORP director Marty Casteel reported equity compensation activity involving restricted stock units and common shares. On May 15, 2026, 975 Restricted Stock Units vested and converted on a one-for-one basis into 975 shares of SFNC common stock, increasing his direct common stock holdings to 219,723 shares.

On the same date, Casteel also received a grant of 3,901 new Restricted Stock Units, each representing a contingent right to receive one share of SFNC common stock. Footnotes describe a vesting schedule through January 4, 2027, with SFNC shares to be delivered within 30 days of each vesting date.

Insider Trade Summary

975 shares exercised/converted

Exercise 3 txns

Insider Casteel Marty

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	3,901	$0.00	$0.00
Exercise	Restricted Stock Units	975	$0.00	$0.00
Exercise	SFNC Common Stock	975	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 2,926 contracts (Direct); SFNC Common Stock — 219,723 shares (Direct)

Footnotes (5)

F1. Restricted Stock Units convert into shares of SFNC common stock on a one-for-one basis.
F2. Each Restricted Stock Unit represents a contingent right to receive one share of SFNC common stock.
F3. 975 Restricted Stock Units vest on May 15, 2026; 975 Restricted Stock Units vest on July 1, 2026; 975 Restricted Stock Units vest on October 1, 2026; and 976 Restricted Stock Units vest on January 4, 2027. SFNC shares will be delivered within 30 days of vesting. Events such as retirement, death, disability, and other specified events in the award agreement may result in earlier vesting.
F4. The Restricted Stock Units vested on May 15, 2026.
F5. 975 Restricted Stock Units vest on July 1, 2026; 975 Restricted Stock Units vest on October 1, 2026; and 976 Restricted Stock Units vest on January 4, 2027. SFNC shares will be delivered within 30 days of vesting. Events such as retirement, death, disability, and other specified events in the award agreement may result in earlier vesting.

Key Figures

Shares acquired via RSU vesting: 975 shares New RSU grant: 3,901 Restricted Stock Units Common shares held after transactions: 219,723 shares +1 more

4 metrics

Shares acquired via RSU vesting 975 shares SFNC common stock received on May 15, 2026

New RSU grant 3,901 Restricted Stock Units Award to Marty Casteel on May 15, 2026

Common shares held after transactions 219,723 shares Direct SFNC common stock ownership following May 15, 2026

RSU-to-share ratio 1 RSU : 1 share Conversion of Restricted Stock Units into SFNC common stock

Key Terms

Restricted Stock Units, contingent right, derivative security, vest

4 terms

Restricted Stock Units financial

"The Restricted Stock Units vested on May 15, 2026."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"Each Restricted Stock Unit represents a contingent right to receive one share"

derivative security financial

"transaction_action": "derivative exercise/conversion""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

vest financial

"975 Restricted Stock Units vest on May 15, 2026; 975 Restricted Stock Units vest on July 1, 2026"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

FAQ

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What transactions did SFNC director Marty Casteel report on May 15, 2026?

Marty Casteel reported a vesting of 975 Restricted Stock Units into 975 shares of SFNC common stock and a separate grant of 3,901 new Restricted Stock Units. These transactions reflect routine equity compensation rather than open-market buying or selling.

How many SFNC common shares does Marty Casteel hold after these Form 4 transactions?

After the May 15, 2026 transactions, Marty Casteel directly holds 219,723 shares of SFNC common stock. This total reflects the addition of 975 shares received when Restricted Stock Units vested and converted into common stock on a one-for-one basis.

What are the terms of the Restricted Stock Units reported by SFNC for Marty Casteel?

Each Restricted Stock Unit represents a contingent right to receive one SFNC common share on a one-for-one basis. Footnotes state that SFNC shares will be delivered within 30 days of vesting, and certain events like retirement or death can trigger earlier vesting under the award agreement.

What new equity award did Marty Casteel receive from SFNC on May 15, 2026?

On May 15, 2026, Marty Casteel received a grant of 3,901 Restricted Stock Units. Each unit is a derivative security that can convert into one share of SFNC common stock, subject to a vesting schedule and conditions described in the award agreement footnotes.

How do the vesting schedules for SFNC Restricted Stock Units work in this Form 4?

Footnotes explain that specific blocks of Restricted Stock Units vest on set dates between July 1, 2026 and January 4, 2027. SFNC shares are delivered within 30 days after each vesting date, and certain events, such as retirement or disability, may accelerate vesting under the award agreement.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 05/19/2026 - 10:34 AM EDT

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Casteel Marty

(Last)

(First)

(Middle)

C/O SIMMONS FIRST NATIONAL CORP.

501 MAIN STREET

(Street)

PINE BLUFF

ARKANSAS

71601

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SIMMONS FIRST NATIONAL CORP [ SFNC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
SFNC Common Stock	05/15/2026		M		975	A	⁽¹⁾	219,723	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. 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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽²⁾	05/15/2026		A		3,901		⁽³⁾	⁽³⁾	SFNC Common Stock	3,901	$0	3,901	D
Restricted Stock Units	⁽¹⁾	05/15/2026		M			975	⁽⁴⁾	⁽⁴⁾	SFNC Common Stock	975	$0	2,926⁽⁵⁾	D

Explanation of Responses:

1. Restricted Stock Units convert into shares of SFNC common stock on a one-for-one basis.

2. Each Restricted Stock Unit represents a contingent right to receive one share of SFNC common stock.

3. 975 Restricted Stock Units vest on May 15, 2026; 975 Restricted Stock Units vest on July 1, 2026; 975 Restricted Stock Units vest on October 1, 2026; and 976 Restricted Stock Units vest on January 4, 2027. SFNC shares will be delivered within 30 days of vesting. Events such as retirement, death, disability, and other specified events in the award agreement may result in earlier vesting.

4. The Restricted Stock Units vested on May 15, 2026.

5. 975 Restricted Stock Units vest on July 1, 2026; 975 Restricted Stock Units vest on October 1, 2026; and 976 Restricted Stock Units vest on January 4, 2027. SFNC shares will be delivered within 30 days of vesting. Events such as retirement, death, disability, and other specified events in the award agreement may result in earlier vesting.

	/s/ Natalie Gassiott, attorney-in-fact for Marty Casteel	05/19/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR