Exhibit 99.1

For Immediate Release

January 28, 2026

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Strong Loan Demand, Net Interest Margin Growth, and Better Efficiency Drive 42% Annualized Increase in Earnings Per Share.

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Reston, VA – John Marshall Bancorp, Inc. (Nasdaq: JMSB) (the “Company”), parent company of John Marshall Bank (the “Bank”), reported net income of $5.9 million for the quarter ended December 31, 2025 compared to $4.8 million for the quarter ended December 31, 2024, an increase of $1.1 million or 23.9%.  Diluted earnings per common share were $0.42 for the quarter ended December 31, 2025 compared to $0.33 for the quarter ended December 31, 2024, an increase of 27.3%. Annualized return on average assets was 1.01% for the quarter ended December 31, 2025 compared to 0.85% for the quarter ended December 31, 2024, an increase of 18.8%.

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Selected Highlights

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Chris Bergstrom, President and Chief Executive Officer, commented, “We are pleased to report a 24% increase in net income for 2025.  We grew our loan portfolio over $103 million in 2025, with 35% of that growth coming in the 4th quarter.  The nearly $140 million in loan commitments booked during the quarter should provide a nice tailwind headed into 2026. Loan growth and the re-pricing of our funding and bond portfolios drove the seventh consecutive quarter of net interest margin expansion and 17.5% revenue growth.  We believe that additional Federal Open Market Committee rate reductions and a continuing normalization of the yield curve could enhance our profitability.  We continue to invest in technology and personnel to cultivate new relationships and deepen existing ones. Despite increasing our headcount by 5%, overhead grew only 5.5% during 2025 and resulted in significant operating leverage.  As we look ahead to 2026, we remain focused on delivering tailored banking services and exceptional client experiences.  The strength of our balance sheet and consistent performance enabled us to implement a quarterly cash dividend.  We believe our fortress balance sheet allows us to focus on continued growth and drive increased returns and shareholder value.”

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Balance Sheet, Liquidity and Credit Quality

Total assets were $2.33 billion at December 31, 2025, $2.32 billion at September 30, 2025, and $2.23 billion at December 31, 2024.  Total assets increased $8.0 million or 1.4% annualized since September 30, 2025 and $98.0 million or 4.4% from December 31, 2024.

Total loans, net of unearned income, increased $37.3 million or 7.6% annualized to $1.98 billion at December 31, 2025 compared to $1.94 billion at September 30, 2025 and increased $103.2 million or 5.5% from $1.87 billion at December 31, 2024.  The increase in loans from September 30, 2025, was primarily attributable to growth in construction & development loans and residential mortgage loans, partially offset by a decline in investor real estate loans. All other portfolios remained relatively unchanged during the most recent quarter.  Refer to the Loan, Deposit and Borrowing Detail table for further information.

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The carrying value of the Company’s fixed income securities portfolio was $212.3 million at December 31, 2025, $205.7 million at September 30, 2025, and $222.3 million at December 31, 2024.  The increase in carrying value of the Company’s fixed income securities portfolio since September 30, 2025 was primarily attributable to purchases of six fixed income securities, designated as available-for-sale, with the total carrying amount of $16.4 million.  As of December 31, 2025, 95.3% of our bond portfolio carried the implied guarantee of the United States government or one of its agencies.  At December 31, 2025, 67.5% of the fixed income portfolio was invested in amortizing bonds, which provides the Company with a source of steady cash flow.  At December 31, 2025, the fixed income portfolio had an estimated weighted average life of 3.9 years.  The available-for-sale portfolio comprised approximately 60% of the fixed income securities portfolio and had a weighted average life of 3.1 years at December 31, 2025.  The held-to-maturity portfolio comprised approximately 40% of the fixed income securities portfolio and had a weighted average life of 5.2 years at December 31, 2025.

The Company’s balance sheet remains highly liquid.  The Company’s liquidity position, defined as the sum of cash, unencumbered securities and available secured borrowing capacity, totaled $827.0 million as of December 31, 2025 compared to $824.3 million as of September 30, 2025 and represented 35.6% and 35.5% of total assets, respectively. In addition to available secured borrowing capacity, the Bank had available federal funds lines of $110.0 million at December 31, 2025.

Total deposits were relatively unchanged at $1.97 billion at December 31, 2025 compared to September 30, 2025, and increased $79.9 million or 4.2% from $1.89 billion at December 31, 2024. During the most recent quarter, total deposits increased $3.5 million or 0.2% when compared to September 30, 2025, primarily due to a 3.6% or $13.4 million increase in interest-bearing demand deposits, a 1.3% or $4.7 million increase in money market accounts, and a 1.0% or $4.4 million increase in core time deposits. These increases were partially offset by a 3.2% or $14.2 million decrease in non-interest bearing demand deposits.

Detail on the deposit activity can be seen in the Loan, Deposit and Borrowing Detail table. As of December 31, 2025, the Company had $691.5 million of deposits that were not insured or not collateralized compared to $682.8 million and $659.2 million at September 30, 2025 and December 31, 2024, respectively.

Federal Home Loan Bank (“FHLB”) advances remained unchanged at $56.0 million as of December 31, 2025 compared to September 30, 2025 and December 31, 2024.  The three FHLB advances have a weighted average fixed interest rate of 3.99%.  In addition to outstanding FHLB advances, total borrowings as of December 31, 2025 included subordinated debt totaling $24.9 million.

Shareholders’ equity increased $19.0 million or 7.7% to $265.6 million at December 31, 2025 compared to $246.6 million at December 31, 2024. Book value per share was $18.70 as of December 31, 2025 compared to $17.28 as of December 31, 2024, an increase of 8.2%. The year-over-year change in book value per share was primarily due to the Company’s earnings over the previous twelve months and a decrease in accumulated other comprehensive loss, resulting from an increase in the market value of our available-for-sale investment portfolio. This increase was partially offset by cash dividend paid and increased share count from shareholder option exercises and restricted share award issuances, partially offset by the Company’s share repurchases during the period.

The Bank’s capital ratios remained well above regulatory thresholds for well-capitalized banks. As of December 31, 2025, the Bank’s total risk-based capital ratio was 16.3%, compared to 16.6% at September 30, 2025, and 16.2% at December 31, 2024.

During the quarter ended December 31, 2025, the Company charged-off a commercial business U.S. Small Business Administration (“SBA”) 7(a) loan in the total amount of $361 thousand.  The charged-off amount represented the unguaranteed portion of the loan.  The Company has submitted a reimbursement claim to the SBA for the guaranteed portion of the loan in the amount of $1.1 million and expects to be paid in full during the first quarter of 2026.  As of December 31, 2025, the Company had no non-accrual loans and no other real estate owned assets.

At December 31, 2025, the allowance for loan credit losses was $19.8 million or 1.0% of outstanding loans, net of unearned income, compared to $19.7 million or 1.02% of outstanding loans, net of unearned income, at September 30, 2025.  The increase in the allowance for loan credit losses during the most recent quarter is predominantly attributable to the growth of the loan portfolio along with the impact of management’s assessment of qualitative factors, mainly related to the evaluation of the existing local economic conditions, as well as considerations of the concentrations of the Company’s loan segments.  These factors contributing to an increase in allowance for credit losses were partially offset by the previously mentioned charge-off of the commercial business SBA 7(a) loan.

At December 31, 2025, the allowance for credit losses on unfunded loan commitments was $1.3 million compared to $1.1 million at September 30, 2025, due to a higher amount of available loan commitments.

The Company did not have an allowance for credit losses on held-to-maturity securities as of December 31, 2025 or September 30, 2025.  As of December 31, 2025, 93.2% of our held-to-maturity portfolio carried the implied guarantee of the United States government or one of its agencies.

The Company believes its owner occupied and non-owner occupied commercial real estate portfolios continue to be of sound credit quality.  The following table demonstrates their strong debt-service-coverage and loan-to-value ratios as of December 31, 2025.

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The following charts provide geographic detail and stated maturity summaries for the Company’s non-owner occupied office portfolio as of December 31, 2025:

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Income Statement Review

Quarterly Results

The Company reported net income of $5.9 million for the fourth quarter of 2025, an increase of $1.1 million or 23.9% when compared to $4.8 million for the fourth quarter of 2024.  

For the three months ended December 31, 2025, net interest income increased $1.8 million or 13.3% to $15.9 million compared to $14.1 million for the three months ended December 31, 2024. During the same period, interest income grew $1.2 million or 4.2%, driven by higher interest income on loans, while interest expense declined by $0.7 million or 5.1%, predominantly due to lower interest expense on time deposits, interest-bearing checking accounts and money market accounts.

The annualized net interest margin for the fourth quarter of 2025 was 2.73% as compared to 2.52% for the same period in 2024.  The increase in net interest margin was primarily due to an increase in average balances of the loan portfolio in combination with the lower rates on interest-bearing deposits.

The cost of interest-bearing liabilities was 3.28% for the fourth quarter of 2025 compared to 3.62% for the same quarter in the prior year driven by the 35 basis points decline in rates on interest-bearing deposits. Rates declined across all deposit categories, most notably in interest-bearing demand deposits, time deposits, and money market accounts, which declined by 38 basis points, 37 basis points, and 36 basis points, respectively.  The yield on interest-earning assets was 4.99% for the fourth quarter of 2025 compared to 5.01% for the same period in 2024 primarily due to a three basis points decrease in loan yield coupled with an 81 basis points decrease in yield on interest-bearing deposits in other banks.  These decreases were partially offset by a 12 basis points increase in securities yield.  Average loans increased by $107.9 million between the three months ended December 31, 2025 and the three months ended December 31, 2024, which was primarily attributable to origination volume in the construction & development and residential mortgage loan portfolios subsequent to December 31, 2024.

Management has been repricing deposits concurrently with each of the three federal funds rate cuts totaling 75 basis points since September 2025.  Management believes that the full benefit of these rate reductions has yet to be realized and expects that the repricing of time deposits should continue to reduce the cost of funds and have a positive impact on the Company’s net interest margin prospectively.

The Company recorded a $624 thousand provision for credit losses for the fourth quarter of 2025 compared to $298 thousand for the fourth quarter of 2024.  Provision for credit losses on funded loans totaled $451 thousand, while provision for credit losses on unfunded loan commitments totaled $173 thousand during the three months ended December 31, 2025.  The provision for credit losses on funded loans during the most recent quarter reflected the impact of the charge-off of the unguaranteed portion of a commercial business SBA 7(a) loan, as well as the growth of the Company’s loan portfolio quarter-over-quarter coupled with the impact of management’s assessment of the qualitative adjustments related to existing local economic conditions and loan segments concentrations.

Non-interest income increased $128 thousand or 45.6% during the fourth quarter of 2025 compared to the fourth quarter of 2024.  This increase was primarily attributable to a $108 thousand increase in gains recorded on sales of the guaranteed portions of the SBA 7(a) loans in combination with the $100 thousand increase in mark-to-market adjustments on investments related to the Company’s nonqualified deferred compensation (“NQDC”) plan.

Non-interest expense increased $26 thousand or 0.3% during the fourth quarter of 2025 compared to the fourth quarter of 2024 primarily resulting from an increase in salaries and employee benefits and higher professional fees.  These increases were partially offset by lower occupancy expense. Salaries and employee benefits increased by $100 thousand, which was mainly related to increases in headcount within the Bank during the current fiscal year.  Professional fees increased by $89 thousand due to higher consulting fees. The $91 thousand decrease in occupancy expense was due to a lower office rent resulting from the renegotiation of certain leases during the current year.

For the three months ended December 31, 2025, annualized non-interest expense to average assets was 1.36% compared to 1.41% for the three months ended December 31, 2024.  This decrease was primarily due to the growth in average assets and stable non-interest expense, when comparing the two periods.  For the three months ended December 31, 2025, the efficiency ratio declined to 48.8% compared to 55.4% for the three months ended December 31, 2024. The improvement in the efficiency ratio was due to a 14.0% growth in total revenue, which outpaced 0.3% increase in non-interest expense over the period.

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Return on average assets for the quarter ended December 31, 2025 was 1.01% and return on average equity was 8.89% compared to 0.85% and 7.71%, respectively, for the fourth quarter of 2024.

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Year-End Results

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The Company reported net income of $21.2 million for the twelve months ended December 31, 2025, an increase of $4.1 million or 24.0% when compared to the same period in 2024.

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Net interest income for the twelve months ended December 31, 2025 increased $9.5 million or 18.6% compared to the same period of 2024.  The net interest margin for the twelve months ended December 31, 2025 was 2.68% as compared to 2.28% for the same period in the prior year. These increases were driven primarily by the decrease in rates of interest-bearing deposits coupled with increases in average balances and yields of the loan portfolio.

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The cost of interest-bearing liabilities was 3.37% for the twelve months ended December 31, 2025 compared to 3.78% for the twelve months ended December 31, 2024.

The decrease in the cost of interest-bearing liabilities was primarily due to a 40 basis points decrease in the cost of interest-bearing deposits as a result of the repricing of the Company’s time deposits coupled with a decrease in rates offered on money market, interest-bearing demand deposits and savings deposit accounts since the fourth quarter of 2024. The yield on interest-earning assets was 5.01% for the twelve months ended December 31, 2025 compared to 4.91% for the same period in 2024. The increase in yield on interest-earning assets was primarily due to a 13 basis point increase in loan yield and an eight basis point increase in securities yield, as a result of higher prevailing interest rates as assets repriced subsequent to the fourth quarter of 2024. Average loans increased $73.1 million between the twelve months ended December 31, 2025 and 2024, which was primarily attributable to origination volume in the construction & development and residential mortgage loan portfolios subsequent to December 31, 2024. These positive contributing factors to the year-over-year increase in the net interest margin were partially offset by lower yields and average balances of interest-bearing deposits in other banks.

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The Company recorded a $1.7 million provision for credit losses for the twelve months ended December 31, 2025 compared to a $0.4 million recovery of provision for credit losses for the twelve months ended December 31, 2024. The provision for credit losses during the twelve months ended December 31, 2025 was primarily a result of growth of the loan portfolio and the related changes in the portfolio mix, coupled with the impact of the charge-off of the unguaranteed portion of a commercial business SBA 7(a) loan and management’s assessment of the qualitative adjustments reflecting changing local economic conditions monitored throughout the year.

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Non-interest income decreased $197 thousand or 8.7% during the twelve months ended December 31, 2025 compared to the same period of 2024.  The decrease was primarily driven by a $198 thousand decrease in the recorded gain on sale of the government guaranteed portion of the SBA 7(a) loans due to lower sale activity along with the $88 thousand decrease in insurance commissions. These decreases were partially offset by a $166 thousand increase to the mark-to-market adjustments on the Company’s NQDC plan and a $37 thousand increase in swap fee income.

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Non-interest expense increased $1.8 million or 5.5% during the twelve months ended December 31, 2025 compared to the same period in 2024 primarily resulting from increases in salaries and employee benefits and other expense, predominantly due to higher data processing service fees and professional fees. The $1.5 million or 7.7% increase in salaries and employee benefits was mainly associated with the higher headcount within the Company and an increase in incentive compensation tied to the Company’s operating performance. The investments made to expand the headcount during the current year are expected to contribute to the future growth of the Company and subsequent increases in revenues. Increase in incentive compensation was commensurate with the 24% year-over-year increase in net income and the fact that the Company’s operating performance for 2025 exceeded the budget and strategic plan.  The $168 thousand or 7.6% increase in data processing service fees was primarily due to contractual increases and volume-based activity.  Professional fees increased $146 thousand or 14.6% for the period, driven primarily by higher consulting fees.  These increases were partially offset by a decrease in the Company’s occupancy expense, which declined by $216 thousand or 12.3%, due to a decrease in office rent as a result of the renegotiation of more favorable terms on certain leases.

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For the twelve months ended December 31, 2025, non-interest expense to average assets was 1.48% compared to 1.41% for the twelve months ended December 31, 2024. The increase was primarily due to higher non-interest expenses, as outlined above, when comparing the two periods.

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For the twelve months ended December 31, 2025, the efficiency ratio was 53.6% compared to 59.7% for the twelve months ended December 31, 2024. The improvement in the efficiency ratio was due to a 17.5% growth in total revenue, which outpaced a 5.5% increase in non-interest expense over the period.

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Return on average assets for the twelve months ended December 31, 2025 was 0.93% and return on average equity was 8.26% compared to 0.76% and 7.16%, respectively, for the twelve months ended December 31, 2024.

About John Marshall Bancorp, Inc.

John Marshall Bancorp, Inc. is the bank holding company for John Marshall Bank. The Bank is headquartered in Reston, Virginia with eight full-service branches located in Alexandria, Arlington, Loudoun, Prince William, Reston, and Tysons, Virginia, as well as Rockville, Maryland, and Washington, D.C. The Bank is dedicated to providing exceptional value, personalized service and convenience to local businesses and professionals in the Washington, D.C. Metropolitan area. The Bank offers a comprehensive line of sophisticated banking products and services that rival those of the largest banks along with experienced staff to help achieve customers’ financial goals. Dedicated relationship managers serve as direct points-of-contact, providing subject matter expertise in a variety of niche industries including charter and private schools, government contractors, health services, nonprofits and associations, professional services, property management companies and title companies. Learn more at  www.johnmarshallbank.com.

Cautionary Note Regarding Forward-Looking Statements

In addition to historical information, this press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are based on certain assumptions and describe future plans, strategies and expectations of the Company. These forward-looking statements are generally identified by use of the words “believe,” “expect,” “intend,” “anticipate,” “estimate,” “project,” “will,” “should,” “may,” “view,” “opportunity,” “potential,” or similar expressions or expressions of confidence. Our ability to predict results or the actual effect of future plans or strategies is inherently uncertain. Factors which could have a material adverse effect on the operations of the Company and the Bank include, but are not limited to, the following: the concentration of our business in the Washington, D.C. metropolitan area and the effect of changes in the economic, political and environmental conditions on this market, including potential reductions in spending by the U.S. Government and related reductions in the federal workforce; adequacy of our allowance for loan credit losses, allowance for unfunded commitments credit losses, and allowance for credit losses associated with our held-to-maturity and available-for-sale securities portfolios; deterioration of our asset quality; future performance of our loan portfolio with respect to recently originated loans; the level of prepayments on loans and mortgage-backed securities; liquidity, interest rate and operational risks associated with our business; changes in our financial condition or results of operations that reduce capital; our ability to maintain existing deposit relationships or attract new deposit relationships; changes in consumer spending, borrowing and savings habits; inflation and changes in interest rates that may reduce our margins or reduce the fair value of financial instruments; changes in the monetary and fiscal policies of the U.S. Government, including policies of the U.S. Treasury and the Board of Governors of the Federal Reserve System; additional risks related to new lines of business, products, product enhancements or services; increased competition with other financial institutions and fintech companies; adverse changes in the securities markets; changes in the financial condition or future prospects of issuers of securities that we own; our ability to maintain an effective risk management framework; changes in laws or government regulations or policies affecting financial institutions, including changes in regulatory structure and in regulatory fees and capital requirements; compliance with legislative or regulatory requirements; results of examination of us by our regulators, including the possibility that our regulators may require us to increase our allowance for credit losses or to write-down assets or take similar actions; potential claims, damages, and fines related to litigation or government actions; the effectiveness of our internal controls over financial reporting and our ability to remediate any future material weakness in our internal controls over financial reporting; geopolitical conditions, including trade restrictions and tariffs, and acts or threats of terrorism and/or military conflicts, or actions taken by the U.S. or other governments in response to trade restrictions and tariffs, and acts or threats of terrorism and/or military conflicts, negatively impacting business and economic conditions in the U.S. and abroad; the effects of weather-related or natural disasters, which may negatively affect our operations and/or our loan portfolio and increase our cost of conducting business; public health events (such as the COVID-19 pandemic) and governmental and societal responses thereto; technological risks and developments, and cyber threats, attacks, or events; changes in accounting policies and practices; our ability to successfully capitalize on growth opportunities; our ability to retain key employees; deteriorating economic conditions, either nationally or in our market area, including higher unemployment and lower real estate values; implications of our status as a smaller reporting company and as an emerging growth company; and other factors discussed in the Company’s reports (such as our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K) filed with the Securities and Exchange Commission.  These risks and uncertainties should be considered in evaluating forward-looking statements and undue reliance should not be placed on such statements. The Company does not undertake, and specifically disclaims any obligation, to publicly release the result of any revisions which may be made to any forward-looking statements to reflect events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events. Annualized, pro forma, projected and estimated numbers are used for illustrative purpose only, are not forecasts and may not reflect actual results.

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* Derived from audited consolidated financial statements.

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* Derived from audited consolidated financial statements.

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