NOTE 1 - DESCRIPTION OF PLAN

The following description of the Plumas Bank (the "Bank" or the “Company”) 401(k) Profit Sharing Plan (the "Plan") provides only general information. Participants should refer to the Summary Plan Description or the Plan Document for a more complete description of the Plan's provisions.

General

Plumas Bank, the Plan Sponsor, established the Plan effective on April 1, 1988, to provide all Bank employees, not otherwise excluded, who have completed three months of service and are eighteen years of age or older with the opportunity to defer a portion of their eligible compensation on a pre-tax basis. New employees become eligible to participate in the profit sharing and employee stock ownership plan (ESOP) contributions when they have worked at least 1,000 hours in a twelve month period. All investments in the Plan are participant directed. The Plan is established to comply with Internal Revenue Code Sections 4975(e)(7) as an employee stock ownership plan. The Plan is also a profit sharing plan containing a Section 401(k) feature that is intended to qualify under Section 401(a) of the Internal Revenue Code of 1986.

Participant Contributions

Each year, participants may make salary deferral contributions in any percentage of their pretax annual compensation, as defined in the Plan, subject to certain Internal Revenue Code (“IRC”) limitations. Participants may also contribute certain rollover contributions from other plans. All participant contributions and earnings thereon are 100% vested. Participants are automatically enrolled on the first day of the month following the date the participant meets eligibility requirements. Eligibility requirements include, but are not limited to, having reached the age of 18 and having completed 3 months of service with the Bank. Effective January 1, 2015, the Plan was amended to include a provision for automatic pretax elective deferral contributions. The provision applies when an employee first becomes eligible to make elective deferral contributions. The automatic deferral rate is currently 8% of compensation with automatic yearly increases on July 1, of 1% (to a maximum of 10%). The automatic deferrals default to target date funds; however, employees can elect to redirect these contributions to other investments within the plan. Employees have the right to change their deferral percentage or to elect not to make contributions.

Employer Contributions

During 2025 the Company’s contribution consisted of a matching amount of 30% of the employee’s contribution up to a total of 3% of the employee’s compensation. At the discretion of the Bank, the Bank may also make non-elective contributions to the Plan, including additional ESOP contributions. Active participants, excluding highly paid employees, who have 1,000 or more hours of service in the plan year are eligible for non-elective contributions. The ESOP discretionary contribution for the Plan Year (if any), plus any forfeitures of employer securities, shall be allocated as of the last day of the Plan Year to each person who meets the allocation requirements. Allocations are based on a participant’s eligible compensation, relative to the total eligible compensation. During 2025 the Bank did not make any discretionary contributions. Bank contributions are subject to certain IRC limitations. Both the matching contribution and any ESOP discretionary contribution vest over a five-year period as follows:

Participant Accounts

Each participant's account is credited with the participant's contributions and an allocation of the Bank's matching and discretionary contributions and Plan earnings and is charged with withdrawals and an allocation of Plan losses and investment management fees. Allocations are based on participant earnings or account balances as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account. Each participant directs the investment of his or her account to any of the investment options available under the Plan.

Investment Options

Upon enrollment to the Plan, a participant may direct deferrals and employer contributions in any of the funds offered by the Plan. Participants may change their investment options daily.

Notes Receivable from Participants

Participants may borrow from their fund accounts a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50 percent of their vested account balance. The loans are secured by the balance in the participant's account and bear interest at prime +1% at the time of borrowing. At December 31, 2025 rates on participant loans ranged from 4.25% to 9.50%. A participant may have only one loan outstanding at any time. Loans must be repaid within a 5-year period. However, if the loan is for the purchase of a primary residence, the repayment period can be up to 20-years. Principal and interest are paid through payroll deductions.

Payment of Benefits

On termination of employment or other reasons specified by the Plan, a participant may elect to receive a lump sum payment, a partial lump sum payment and partial installment payments, or installment payments (annually, quarterly or monthly) over a specified period of time, not exceeding the participant's life expectancy or the joint life expectancy of the participant or participant's beneficiary. If a participant’s vested account is $5,000 or less at termination of employment, the vested balance will be paid in a single sum. If a participant’s vested account balance at termination of employment is more than $1,000 and the participant has not reached normal retirement age and the participant does not elect to have their vested account paid in a single sum or rolled to another retirement plan the vested account will automatically roll to an IRA in a direct rollover.

At December 31, 2025, and 2024, there were no benefits payable to participants that have elected to withdraw from the Plan but have not yet been paid.

Forfeitures

Forfeitures from the nonvested portion of terminated employees' account balances can be used to reduce employer contributions in the following plan year or can be used to pay administrative expenses. Forfeitures used to reduce employer contributions totaled $13,755 during the year ended December 31, 2025. No forfeitures were used to offset plan expenses during these years.

Administrative Costs

The Plan’s expenses are paid by either the Plan or the Company, as provided by the plan document. Expenses that are paid directly by the Company are excluded from these financial statements. Certain expenses incurred in connection with the general administration of the Plan that are paid by the Plan are recorded as deductions in the accompanying statement of changes in net assets available for benefits. In addition, certain investment related expenses are included in net appreciation in fair value of investments presented in the accompanying statement of changes in net assets available for benefits.

Voting Rights

Each participant is entitled to exercise voting rights attributable to the shares allocated to his or her account and is notified by the Bank prior to the time that such rights are to be exercised. If the Trustee does not timely receive voting directions from a participant or beneficiary, the Trustee shall vote the shares in such manner as directed by the Bank.

Put Option

Plumas Bancorp stock that is held by the Plan and its participants and is not readily tradable on an established market, or is subject to trading limitations, includes a put option. The put option is a right to demand that the Company buy any shares of its stock distributed to participants for which there is not a market. The put prices are representative of the fair market value of the stock.

Plan Termination

Although it has not expressed any intent to do so, the Bank has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event that the Plan is terminated, participants will become fully vested in their accounts.

NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

NOTE 3 - INVESTMENT IN CONTRACTS WITH INSURANCE COMPANY

At December 31, 2025 and 2024, the Plan has an investment in a fully benefit-responsive Group Annuity contract with Principal Life Insurance Company (Principal; Issuer) which is reported at contract value in the statements of net assets available for benefits. Under the terms of the contract, the contributions are maintained in a general account. The account is credited with earnings on the underlying investments and charged for participant withdrawals and administrative expenses. Contract value, which totaled $822,452and $1,068,584at December 31, 2025 and 2024, respectively, represents contributions made under the contract, plus earnings, less participant withdrawals and administrative expenses. Participants may ordinarily direct the withdrawal or transfer of all or a portion of their investment at contract value.

The guaranteed investment contract issuer is contractually obligated to repay the principal and a specified interest rate that is guaranteed to the Plan. There are no reserves against contract value for credit risk of the contract issuer or otherwise.

Certain events limit the ability of the Plan to transact at contract value with the issuer. Such events include the following: (1) amendments to the Plan documents (including complete or partial plan termination or merger with another plan), (2) changes to the Plan's prohibition on competing investment options or deletion of equity wash provisions, (3) bankruptcy of the Plan Sponsor or other Plan Sponsor events (for example, divestitures or spin-offs of a subsidiary) that cause a significant withdrawal from the Plan, or (4) the failure of the trust to qualify for exemption from federal income taxes or any required prohibited transaction exemption under Employee Retirement Income Security Act of 1974. In the event that the Plan Sponsor terminates the contract without providing at least 12 months’ notice the contract payout would be subject to a 5% termination fee. The plan administrator does not believe that the occurrence of any other such contract value events, which would limit the Plan's ability to transact at contract value with participants, is probable. The guaranteed investment contract does not permit the insurance company to terminate the agreement prior to the scheduled maturity date. An employer-initiated transfer that exceeds 10% of the value of the contract is subject to a 5% surrender charge.

The crediting interest rate of the contract is based on a formula agreed upon with the issuer, as defined in the contract agreement, but cannot be less than zero. Such interest rates are reviewed and reset on semi-annual basis. The key factors that influence future interest crediting rates could include the following: the level of market interest rates; the amount and timing of participant contributions, transfers and withdrawals into/out of the contracts; and the duration of the underlying investments backing the contract.

The crediting rate is based on a formula established by the contract issuer but may not be less than 1% or greater than 3%.

At December 31, 2025 and 2024 the Plan had an investment in Paid-Up Deferred Annuities purchased through Principal Pension Builder (Principal; Issuer) which is reported at contract value in the statements of net assets available for benefits. This investment option allows participants to purchase deferred income annuities. The contract value for this investment totaled $2,734 and $2,062 at December 31 2025 and 2024, respectively.

NOTE 4 - FAIR VALUE MEASUREMENTS

Fair Value Hierarchy

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The effect of a change in valuation technique or its application on a fair value estimate is accounted for prospectively as a change in accounting estimate. When evaluating indications of fair value resulting from the use of multiple valuation techniques, the Plan is to select the point within the resulting range of reasonable estimates of fair value that is most representative of fair value under current market conditions.

Fair value measurements are classified within a hierarchy that prioritizes inputs based on their observability in the market. Fair value measurements are determined by maximizing the use of observable inputs and minimizing the use of unobservable inputs. The hierarchy places the highest priority on unadjusted quoted market prices in active markets for identical assets or liabilities (level 1 measurements) and gives the lowest priority to unobservable inputs (level 3 measurements). The three levels of inputs within the fair value hierarchy are defined as follows:

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the Plan has the ability to access as of the measurement date.

Level 2: Significant other observable inputs other than level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs that reflect the Plan's own assumptions about the assumptions that market participants would use in pricing an asset or liability.

In some cases, a valuation technique used to measure fair value may include inputs from multiple levels of the fair value hierarchy. The lowest level of significant input determines the placement of the entire fair value measurement in the hierarchy. Transfers between hierarchy measurement levels are recognized by the Plan as of the actual date of the event or change in circumstances that caused the transfer.

The following descriptions of the valuation methods and assumptions used by the Plan to estimate the fair values of investments apply to investments held directly by the Plan.

Company Common Stock: The fair value of Plumas Bancorp common stock is determined by obtaining quoted prices from a nationally recognized exchange (level 1 inputs).

Mutual Funds (including money market mutual funds): The fair values of mutual fund investments are valued at the net asset value (NAV) of shares held by the Plan and are valued at the closing price reported on the active market on which the individual securities are traded.

Investments measured at fair value on a recurring basis which are held directly by the Plan are summarized below:

Investments measured at fair value on a recurring basis which are held directly by the Plan are summarized below:                  

NOTE 5 - CONCENTRATION OF INVESTMENTS

At December 31, 2025 and 2024, the Plan held investments in Plumas Bancorp common stock, representing approximately 14% and 17%, respectively of net assets available for benefits.

NOTE 6 – RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS

At December 31, 2025 and 2024, the Plan's investments in Plumas Bancorp common stock (a related party) are as follows:

Dividends of $118,601 were paid by Plumas Bancorp to the Plan during the year ended December 31, 2025. Net depreciation in fair value of Plumas Bancorp stock totaled $248,941 during 2025.

Certain Plan investments are managed by Principal. Principal is the trustee as defined by the Plan and, therefore, these transactions qualify as party-in-interest transactions. Fees paid by the Plan for investment management services totaled approximately $64,000 for the year ended December 31, 2025. Notes receivable from participants also reflect party-in-interest transactions.

NOTE 7 - FEDERAL INCOME TAX STATUS

The Internal Revenue Service (“IRS”) issued an opinion letter dated June 30, 2020 indicating that the prototype adopted by the Plan, as then designed, was in compliance with applicable sections of the IRC. The Plan has been amended subsequent to this opinion letter. However, the Plan Administrator believes that the Plan is designed, and is currently being operated, in compliance with the applicable requirements of the IRC, and therefore, believes that the Plan is qualified, and the related Trust is tax-exempt. Therefore, no provision for income taxes has been included in the Plan’s financial statements.

U.S. GAAP requires Plan management to evaluate tax positions taken by the Plan and recognize a tax liability (or tax asset) if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the IRS. The Plan management analyzed the tax positions taken by the Plan and concluded that, at December 31, 2025 and 2024, there were no uncertain positions taken or expected to be taken that would require recognition of a tax liability (or tax asset) or disclosure in the financial statements. The Plan is subject to routine audits by tax jurisdictions; however, there are currently no audits for any tax periods in progress.

Note 8 – RIGHT OF FIRST REFUSAL

Any participant desiring to sell Plumas Bancorp stock to a third party shall give written notice of such desire to the Plan management. Both the Trust and the Employer have the right of first refusal for a period of fourteen (14) days from the date the participant gives such notice to acquire the offered shares with the Trust having priority. The selling price and terms shall be the same as offered by the third party.

NOTE 9 – SUBSEQUENT EVENTS

The Plan Administrator has evaluated subsequent events through June 22, 2026, the date which the financial statements were available to be issued.

SUPPLEMENTAL SCHEDULE

PLUMAS BANK 401(k) PROFIT SHARING PLAN

EMPLOYER IDENTIFICATION NUMBER: 95-3520374

PLAN NUMBER: 001

SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2025