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fsbc-20260427

0001275168FALSE00012751682026-04-272026-04-27

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported): April 27, 2026

FIVE STAR BANCORP

(Exact Name of Registrant as Specified in Charter)

California

001-40379

75-3100966

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

3100 Zinfandel Drive, Suite 100, Rancho Cordova, California, 95670

(Address of Principal Executive Offices, and Zip Code)

(916) 626-5000

Registrant’s Telephone Number, Including Area Code

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐

Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, no par value per share

FSBC

The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☑

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition

On April 27, 2026, Five Star Bancorp (the “Company”) issued a press release announcing its results of operations and financial condition for the quarter ended March 31, 2026. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

This information (including Exhibit 99.1) is being furnished under Item 2.02 hereof and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and such information shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 7.01    Regulation FD Disclosure

The Company is conducting an earnings call on April 28, 2026 at 10:00 AM PT/1:00 PM ET to discuss its first quarter 2026 financial results. A copy of the investor presentation to be used during the earnings call is attached to this Current Report on Form 8-K as Exhibit 99.2 and is incorporated herein by reference.

This information (including Exhibit 99.2) is being furnished under Item 7.01 hereof and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, and such information shall not be deemed incorporated by reference into any filing under the Securities Act, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits

(d) Exhibits

Number

Description

99.1

Press Release dated April 27, 2026

99.2

First Quarter 2026 Investor Presentation, dated April 28, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

FIVE STAR BANCORP

By:

/s/ Heather C. Luck

Name: Heather C. Luck

Title: Executive Vice President and Chief Financial Officer

Date: April 28, 2026

fsbc-202601260001275168FALSE00012751682026-01-262026-01-26

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 26, 2026

FIVE STAR BANCORP

(Exact Name of Registrant as Specified in Charter)

California 001-40379 75-3100966 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

3100 Zinfandel Drive, Suite 100, Rancho Cordova, California, 95670 (Address of Principal Executive Offices, and Zip Code)

(916) 626-5000 Registrant’s Telephone Number, Including Area Code

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, no par value per shareFSBCThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☑ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition On January 26, 2026, Five Star Bancorp (the “Company”) issued a press release announcing its results of operations and financial condition for the quarter and year ended December 31, 2025. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. This information (including Exhibit 99.1) is being furnished under Item 2.02 hereof and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and such information shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 7.01    Regulation FD Disclosure The Company is conducting an earnings call on January 27, 2026 at 10:00 AM PT/1:00 PM ET to discuss its fourth quarter and year end 2025 financial results. A copy of the investor presentation to be used during the earnings call is attached to this Current Report on Form 8-K as Exhibit 99.2 and is incorporated herein by reference. This information (including Exhibit 99.2) is being furnished under Item 7.01 hereof and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, and such information shall not be deemed incorporated by reference into any filing under the Securities Act, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits (d) Exhibits

Number Description 99.1

Press Release dated January 26, 2026

99.2Fourth Quarter and Year End 2025 Investor Presentation, dated January 27, 2026

104Cover Page Interactive Data File (embedded within the Inline XBRL)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

FIVE STAR BANCORP

By:/s/ Heather C. Luck Name: Heather C. Luck Title: Executive Vice President and Chief Financial Officer

Date: January 26, 2026