Five Star Bancorp COO sells 400 company shares

FIVE STAR BANCORP executive vice president and chief operating officer Lydia Ann Ramirez-Medina reported an open-market sale of 400 shares of common stock at $40.99 per share on May 6, 2026.

Rhea-AI Filing Summary

FIVE STAR BANCORP executive vice president and chief operating officer Lydia Ann Ramirez-Medina reported an open-market sale of 400 shares of common stock at $40.99 per share on May 6, 2026. After this transaction, she directly holds 10,960 shares.

According to a footnote, her reported holdings include share grants under the Five Star Bancorp 2021 Equity Incentive Plan: 4,332 shares, 6,000 shares, and 3,629 shares. Portions of these grants have already vested, while the remaining shares are scheduled to vest in equal installments over the remainder of five-year periods, provided she remains employed on the respective vesting dates.

Insider Trade Summary

Net Seller: 400 shares

Net Sell 1 txn

Insider Ramirez-Medina Lydia Ann

Role EVP & Chief Operating Officer

Sold 400 shs ($16K)

Type	Security	Shares	Price	Value
Sale	Common Stock	400	$40.99	$16K

Holdings After Transaction: Common Stock — 10,960 shares (Direct)

Footnotes (1)

1. F1. 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 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

Shares sold: 400 shares Sale price per share: $40.99 per share Shares held after transaction: 10,960 shares +3 more

6 metrics

Shares sold 400 shares Open-market sale on May 6, 2026

Sale price per share $40.99 per share Common stock transaction

Shares held after transaction 10,960 shares Direct ownership following the sale

Equity grant 1 4,332 shares Granted under 2021 Equity Incentive Plan

Equity grant 2 6,000 shares Granted under 2021 Equity Incentive Plan

Equity grant 3 3,629 shares Granted under 2021 Equity Incentive Plan

Key Terms

open-market sale, transaction code "S", 2021 Equity Incentive Plan, vested, +1 more

5 terms

open-market sale financial

"reported an open-market sale of 400 shares of common stock"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

transaction code "S" regulatory

"The filing classifies the trade with transaction code “S,” indicating a sale"

2021 Equity Incentive Plan financial

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

vested financial

"including 3,465 shares which have vested and 867 which are scheduled"

scheduled to vest financial

"3,600 which are scheduled to vest in equal installments"

FAQ

What insider transaction did FSBC executive Lydia Ann Ramirez-Medina report?

Lydia Ann Ramirez-Medina reported selling 400 shares of FIVE STAR BANCORP common stock in an open-market transaction at $40.99 per share. This Form 4 filing reflects a routine disposition and updates her direct ownership position in the company’s stock.

How many FIVE STAR BANCORP (FSBC) shares does the COO hold after this sale?

Following the sale, Lydia Ann Ramirez-Medina directly holds 10,960 shares of FIVE STAR BANCORP common stock. This figure includes shares granted under the company’s 2021 Equity Incentive Plan, combining vested shares and additional shares scheduled to vest over several years.

At what price were the FIVE STAR BANCORP (FSBC) shares sold in this Form 4?

The 400 FIVE STAR BANCORP common shares were sold at $40.99 per share in an open-market transaction. The filing classifies the trade with transaction code “S,” indicating a sale in the open market or a private transaction under SEC rules.

What equity awards are included in the FSBC COO’s reported holdings?

Her reported holdings include grants of 4,332, 6,000, and 3,629 shares under the Five Star Bancorp 2021 Equity Incentive Plan. Some portions of these grants have already vested, while remaining shares will vest in equal installments over five-year periods, contingent on continued employment.

How are vesting conditions described for FSBC’s 2021 Equity Incentive Plan grants?

The grants under the Five Star Bancorp 2021 Equity Incentive Plan vest in equal installments over the remainder of five-year periods. Vesting is conditional on Ms. Ramirez-Medina remaining employed by Five Star Bancorp on each respective vesting date, aligning incentives with ongoing service.

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Accepted by SEC EDGAR 05/07/2026 - 04:39 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)
05/06/2026

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	05/06/2026		S		400	D	$40.99	10,960(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 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	05/07/2026
	** 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)