[Form 4] Five Star Bancorp Insider Trading Activity

Rhea-AI Filing Summary

Five Star Bancorp (FSBC) insider filing: Lydia A. Ramirez-Medina, EVP & Chief Operating Officer and director, reported a sale of 825 shares of Five Star Bancorp common stock on 08/15/2025 at a reported price of $30.9438 per share. After the sale she beneficially owns 11,960 shares. The filing discloses equity awards under the Five Star Bancorp 2021 Equity Incentive Plan: 4,332 shares (3,465 vested, 867 scheduled to vest), 6,000 shares (1,200 vested, 4,800 scheduled to vest), and 3,629 shares scheduled to vest beginning in 2026. The form is signed by an attorney-in-fact.

Positive

• Timely compliance with Section 16 reporting requirements via Form 4 filing
• Transparency about the composition of equity awards and vesting schedules
• Continued beneficial ownership of 11,960 shares after the reported sale

Negative

• Insider sale of 825 shares reported, reducing immediate holdings
• Significant portion of shares are unvested or scheduled to vest, indicating future dilution when they vest

Insights

Corporate Governance Expert

TL;DR: Routine insider sale with continued substantial beneficial ownership and multiple outstanding time-based equity awards.

The reported transaction is a straightforward sale of 825 shares reported on Form 4, consistent with required Section 16 disclosure. Ramirez-Medina retains 11,960 beneficially owned shares and holds a mix of vested and scheduled-to-vest awards under the 2021 Equity Incentive Plan. From a governance perspective, the filing demonstrates compliance with reporting obligations and transparency about award vesting schedules.

Securities Analyst

TL;DR: Small open-market sale relative to total holdings; remaining equity awards create future share interest.

The sale of 825 shares at $30.9438 reduces immediate holdings but leaves Ms. Ramirez-Medina with 11,960 shares. The disclosure of three award tranches (4,332; 6,000; 3,629 shares) with specified vested and scheduled vesting provides clear detail on potential future share delivery. This is a routine Section 16 filing and does not by itself indicate a material change to insider ownership concentration.

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
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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 CA 95670

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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

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. 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	08/15/2025		S		825	D	$30.9438	11,960(1)	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. Includes 4,332 shares granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan (including 3,465 shares which have vested and 867 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), 6,000 shares granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan (including 1,200 shares which have vested and 4,800 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 which are scheduled to vest in equal installments over a five-year period beginning in 2026.

Remarks:

	/s/ Lydia A. Ramirez-Medina, by Heather C. Luck, Attorney-in-Fact	08/18/2025
	** 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.

FAQ

What transaction did Lydia A. Ramirez-Medina report on Form 4 for FSBC?

She reported a sale of 825 shares of Five Star Bancorp common stock on 08/15/2025 at a price of $30.9438 per share.

How many FSBC shares does Ramirez-Medina beneficially own after the reported transaction?

The Form 4 reports she beneficially owns 11,960 shares following the sale.

What equity awards are disclosed in the filing for Ramirez-Medina?

The filing discloses awards of 4,332 shares (3,465 vested, 867 scheduled to vest), 6,000 shares (1,200 vested, 4,800 scheduled to vest), and 3,629 shares scheduled to vest beginning in 2026 under the 2021 Equity Incentive Plan.

What is Ramirez-Medina's role at Five Star Bancorp as listed on the Form 4?

She is listed as EVP & Chief Operating Officer and a Director of Five Star Bancorp.

Who signed the Form 4 filing for Ramirez-Medina?

The Form 4 is signed by /s/ Lydia A. Ramirez-Medina, by Heather C. Luck, Attorney-in-Fact dated 08/18/2025.