Five Star Bancorp CFO granted 2,715 shares

Luck Heather Christina reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Luck Heather Christina reported acquisition or exercise transactions in this Form 4 filing.

Five Star Bancorp reported that EVP and Chief Financial Officer Heather Christina Luck received a grant of 2,715 shares of common stock on May 21, 2026. The shares were awarded at no cash cost as restricted stock under the Five Star Bancorp 2021 Equity Incentive Plan.

The award vests annually in equal installments over five years, contingent on Ms. Luck remaining employed by the company on each vesting date. Following this grant, she directly holds 30,376 shares of common stock, including previously granted restricted stock awards that are partly vested and partly scheduled to vest over time.

Insider Trade Summary

Grant/Award: 2,715 shares

Grant/Award 1 txn

Insider Luck Heather Christina

Role EVP, Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,715	$0.00	$0.00

Holdings After Transaction: Common Stock — 30,376 shares (Direct)

Footnotes (2)

1. F1. Granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan. The award of restricted stock vests annually in equal installments over five years, provided Ms. Luck, the reporting person, remains employed by Five Star Bancorp on the respective vesting dates.
2. F2. Includes 6,000 shares granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan (including 2,400 shares which have vested and 3,600 which are scheduled to vest in equal installments over the remainder of a five-year period, provided Ms. Luck remains employed by Five Star Bancorp on the respective vesting dates) and 3,629 shares granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan (including 726 shares which have vested and 2,903 which are scheduled to vest in equal installments over the remainder of a five-year period, provided Ms. Luck remains employed by Five Star Bancorp on the respective vesting dates).

Key Figures

Restricted stock grant: 2,715 shares Post-transaction holdings: 30,376 shares Grant price: $0.00 per share +5 more

8 metrics

Restricted stock grant 2,715 shares Common stock awarded on May 21, 2026

Post-transaction holdings 30,376 shares Total common stock directly held after grant

Grant price $0.00 per share Restricted stock award, no cash paid by insider

Vesting period 5 years Restricted stock vests annually in equal installments

Prior grant 1 total 6,000 shares Restricted stock under 2021 Equity Incentive Plan

Prior grant 1 vested portion 2,400 shares Already vested from 6,000-share award

Prior grant 2 total 3,629 shares Additional restricted stock under the plan

Prior grant 2 vested portion 726 shares Already vested from 3,629-share award

Key Terms

restricted stock, Five Star Bancorp 2021 Equity Incentive Plan, vesting dates, grant, award, or other acquisition

4 terms

restricted stock financial

"The award of restricted stock vests annually in equal installments over five years"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Five Star Bancorp 2021 Equity Incentive Plan financial

"Granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan"

vesting dates financial

"provided Ms. Luck remains employed by Five Star Bancorp on the respective vesting dates"

grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

FAQ

What insider transaction did Five Star Bancorp (FSBC) report for Heather Christina Luck?

Five Star Bancorp reported that EVP and CFO Heather Christina Luck received a grant of 2,715 shares of common stock. The shares are a restricted stock award under the 2021 Equity Incentive Plan and increase her direct holdings to 30,376 shares after the transaction.

How many Five Star Bancorp (FSBC) shares did the CFO receive in this Form 4 filing?

The CFO received 2,715 shares of Five Star Bancorp common stock. These shares were granted as a restricted stock award at a price of $0.00 per share under the 2021 Equity Incentive Plan, rather than being purchased in the open market.

How does the new restricted stock grant affect the CFO’s total FSBC share holdings?

After the 2,715-share restricted stock grant, the CFO directly holds 30,376 shares of Five Star Bancorp common stock. This total includes earlier awards under the 2021 Equity Incentive Plan that are partly vested and partly scheduled to vest in future years.

What are the vesting terms of the FSBC restricted stock granted to the CFO?

The 2,715-share restricted stock award vests in equal annual installments over five years. Vesting is contingent on Heather Christina Luck remaining employed by Five Star Bancorp on each vesting date, aligning the grant with continued service at the bank.

What other restricted stock awards under the FSBC 2021 Equity Incentive Plan does the CFO hold?

The filing notes the CFO holds 6,000 shares from one grant and 3,629 shares from another under the 2021 Equity Incentive Plan. Portions of each grant have already vested, while remaining shares will vest in equal installments over the rest of their five-year schedules.

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Accepted by SEC EDGAR 05/26/2026 - 04:09 PM Learn about SEC filing dates

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^*

Luck Heather Christina

(Last) (First) (Middle)

C/O FIVE STAR BANCORP

3100 ZINFANDEL DRIVE, SUITE 100

(Street)

RANCHO CORDOVA CALIFORNIA 95670

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
FIVE STAR BANCORP [ FSBC ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/21/2026		A		2,715(1)	A	$0	30,376(2)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan. The award of restricted stock vests annually in equal installments over five years, provided Ms. Luck, the reporting person, remains employed by Five Star Bancorp on the respective vesting dates.

2. Includes 6,000 shares granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan (including 2,400 shares which have vested and 3,600 which are scheduled to vest in equal installments over the remainder of a five-year period, provided Ms. Luck remains employed by Five Star Bancorp on the respective vesting dates) and 3,629 shares granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan (including 726 shares which have vested and 2,903 which are scheduled to vest in equal installments over the remainder of a five-year period, provided Ms. Luck remains employed by Five Star Bancorp on the respective vesting dates).

Remarks:

	/s/ Heather C. Luck	05/26/2026
	** 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)