SIERRA BANCORP Reports Material Event

Sierra Bancorp announced a leadership transition in its finance function.

Rhea-AI Filing Summary

Sierra Bancorp announced a leadership transition in its finance function. Senior Vice President & Chief Accounting Officer Cindy Dabney will retire and resign as Principal Accounting Officer effective January 5, 2026. Executive Vice President & Chief Financial Officer Christopher G. Treece (age 57) will assume the role of Principal Accounting Officer.

Treece has served as CFO of the company and Bank since January 2020, and there will be no changes to his compensation in connection with this appointment.

Insights

Corporate Governance Analyst

Officer transition: CAO retires; CFO named Principal Accounting Officer with no pay change; low operational disruption expected.

Sierra Bancorp disclosed that Senior VP & Chief Accounting Officer Cindy Dabney will retire effective January 5, 2026. Executive VP & CFO Christopher G. Treece, age 57, will assume the role of Principal Accounting Officer. He has served as CFO since January 2020. The company states there will be no compensation changes for Mr. Treece tied to this appointment.

This consolidates financial reporting oversight under the current CFO, which can streamline decision-making but concentrates responsibilities. The filing does not indicate changes to financial reporting timelines or compensation arrangements beyond the stated point.

Key watch item is the effective date on January 5, 2026. Subsequent periodic reports can signal how responsibilities are allocated across finance and accounting leadership and whether any further appointments or disclosures follow this transition.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 11/10/2025 - 12:57 PM EST Learn about SEC filing dates

0001130144false00011301442025-11-052025-11-05

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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) November 5, 2025

SIERRA BANCORP

(Exact name of registrant as specified in its charter)

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California	000-33063	33-0937517
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

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86 North Main Street, Porterville, CA 93257
(Address of principal executive offices)	(Zip code)

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(559) 782-4900

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

☐Pre-commencement communications 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:

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Title of each class	​	Trading Symbol(s)	​	Name of each exchange on which registered
Common Stock, no par value	​	BSRR	​	NASDAQ Global Select Market

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

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. ☐

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Item 5.02Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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(b)On November 5, 2025, Cindy Dabney, Senior Vice President & Chief Accounting Officer, announced her retirement and resignation as Principal Accounting Officer of the Registrant and its wholly owned subsidiary, Bank of the Sierra (“Bank”) to be effective on January 5, 2026.  In connection with Ms. Dabney’s retirement, Christopher Treece, age 57, Executive Vice President & Chief Financial Officer will assume the role of Principal Accounting Officer. Mr. Treece has served as Executive Vice President & Chief Financial Officer of the Company and Bank since January 2020. There will be no changes to Mr. Treece’s compensation as a result of his appointment as Principal Accounting Officer.

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SIGNATURES

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

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​	​	SIERRA BANCORP
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Dated: November 10, 2025		By:	/s/ Christopher G. Treece	​
​	​	​	Christopher G. Treece	​
​	​	​	Executive Vice President &	​
​	​	​	Chief Financial Officer	​
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