FSBC COO granted 2,715 restricted shares

Ramirez-Medina Lydia Ann reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Ramirez-Medina Lydia Ann reported acquisition or exercise transactions in this Form 4 filing.

FIVE STAR BANCORP EVP and COO Lydia Ann Ramirez-Medina received an award of 2,715 shares of common stock on May 21, 2026 at no cash cost to her. The grant is restricted stock under the Five Star Bancorp 2021 Equity Incentive Plan and vests annually in equal installments over five years, as long as she remains employed on each vesting date.

After this grant, she directly holds 13,675 shares of common stock. Footnotes explain that this total includes prior restricted stock awards where some shares have already vested and others are scheduled to vest over the remaining five-year periods, reinforcing that this is compensation-related rather than an open-market purchase.

Insider Trade Summary

Grant/Award: 2,715 shares

Grant/Award 1 txn

Insider Ramirez-Medina Lydia Ann

Role EVP, Chief Operating Officer

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

Holdings After Transaction: Common Stock — 13,675 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. Ramirez, 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. Ramirez 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. Ramirez remains employed by Five Star Bancorp on the respective vesting dates).

Key Figures

Restricted stock grant: 2,715 shares Post-transaction holdings: 13,675 shares First prior grant total: 6,000 shares +5 more

8 metrics

Restricted stock grant 2,715 shares Awarded on May 21, 2026 to EVP and COO

Post-transaction holdings 13,675 shares Total common stock directly held after grant

First prior grant total 6,000 shares Restricted stock under 2021 Equity Incentive Plan

First prior grant vested 2,400 shares Already vested from 6,000-share award

First prior grant unvested 3,600 shares Scheduled to vest over remaining five-year period

Second prior grant total 3,629 shares Restricted stock under 2021 Equity Incentive Plan

Second prior grant vested 726 shares Already vested from 3,629-share award

Second prior grant unvested 2,903 shares Scheduled to vest over remaining five-year period

Key Terms

restricted stock, Five Star Bancorp 2021 Equity Incentive Plan, vests annually, vesting dates

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"

vests annually financial

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

vesting dates financial

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

FAQ

What insider transaction did FIVE STAR BANCORP (FSBC) report for Lydia Ann Ramirez-Medina?

FIVE STAR BANCORP reported that EVP and COO Lydia Ann Ramirez-Medina received a grant of 2,715 shares of common stock. The award is restricted stock issued under the company’s 2021 Equity Incentive Plan as part of her compensation, not an open-market stock purchase.

How many FIVE STAR BANCORP (FSBC) shares does Lydia Ann Ramirez-Medina hold after this Form 4 grant?

After the 2,715-share restricted stock grant, Lydia Ann Ramirez-Medina directly holds 13,675 shares of FIVE STAR BANCORP common stock. This total includes earlier restricted stock awards, some already vested and others scheduled to vest over the remainder of their five-year vesting periods.

How does the new FSBC restricted stock award to Lydia Ann Ramirez-Medina vest?

The 2,715-share restricted stock award to Lydia Ann Ramirez-Medina vests annually in equal installments over five years. Each installment only vests if she remains employed by Five Star Bancorp on the applicable vesting date, aligning the award with continued executive service.

Is the FSBC Form 4 transaction for Lydia Ann Ramirez-Medina a stock purchase or compensation grant?

The transaction is a compensation grant, not a stock purchase. Lydia Ann Ramirez-Medina received 2,715 shares of restricted common stock at a stated price of $0.00 per share under the 2021 Equity Incentive Plan, reflecting an award rather than an open-market buy.

What prior equity awards are referenced in the FSBC Form 4 footnotes for Lydia Ann Ramirez-Medina?

Footnotes state she has a 6,000-share restricted stock grant with 2,400 shares vested and 3,600 scheduled to vest, plus a 3,629-share grant with 726 vested and 2,903 scheduled to vest. All were granted under the Five Star Bancorp 2021 Equity Incentive Plan.

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Accepted by SEC EDGAR 05/26/2026 - 04:10 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^*

Ramirez-Medina Lydia Ann

(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 Operating 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	13,675(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. Ramirez, 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. Ramirez 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. Ramirez remains employed by Five Star Bancorp on the respective vesting dates).

Remarks:

	/s/ Lydia A. Ramirez-Medina, by Heather C. Luck, Attorney-in-Fact	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)