Strategic Balance Sheet Management Yields a Healthy Net Interest Margin

FAIRFAX, Va., Jan. 26, 2026 /PRNewswire/ -- MainStreet Bancshares, Inc. (NASDAQ:MNSB, MNSBP)), the financial holding company for MainStreet Bank, reported a net income of $15.6 million for the year-ended December 31, 2025, resulting in earnings per common share of $1.76. The Company executed a buyback of 209,000 shares during the fourth quarter as part of its share buyback plan. The Company and Bank remain strongly capitalized.

"The team delivered quickly on our focused return to core banking," said Jeff W. Dick, Chairman and CEO of MainStreet Bancshares, Inc. and MainStreet Bank. "We are steadfast in increasing profitability and primed to go forward."

"The net interest margin expanded to 3.46% for 2025, a 33-basis point increase from the previous year," said Alex Vari, Chief Financial Officer of MainStreet Bancshares, Inc. and MainStreet Bank. "We plan to preserve and grow this strong net interest margin and continue to control our expenses to enhance our future performance. We are laser-focused on building a strong balance sheet and our portfolio is well-positioned for the current and anticipated interest rate environment."

"We continue to prove positive outcomes as we manage our asset quality and grow our loan portfolio," said Tom Floyd, Chief Lending Officer of MainStreet Bank. "Our team increased gross loans by $54 million in the fourth quarter, and we're encouraged by the momentum carrying into this year."

About MainStreet Bank: MainStreet Bank is coming to Middleburg, Virginia in February 2026! Our newest branch will be located at 10 North Pendleton Street, Middleburg, Virginia 20118.

In addition, MainStreet operates six branches in Herndon, Fairfax, McLean, Leesburg, Clarendon, and Washington, D.C. MainStreet Bank has over 55,000 free ATMs and a fully integrated online and mobile banking solution. The Bank is not restricted by a conventional branching system, as it can offer business customers the ability to Put Our Bank in Your Office®. With robust and easy-to-use online business banking technology, MainStreet has "put our bank" in thousands of businesses in the metropolitan area.

MainStreet Bank has a robust line of business and professional lending products, including government contracting lines of credit, commercial lines and term loans, residential and commercial construction, and commercial real estate. MainStreet also works with the SBA to offer 7A and 504 lending solutions. From sophisticated cash management to enhanced mobile banking and instant-issue Debit cards, MainStreet Bank is always looking for ways to improve our customer's experience.

MainStreet Bank was the first community bank in the Washington, D.C., metropolitan area to offer a full online business banking solution. MainStreet Bank was also the first bank headquartered in the Commonwealth of Virginia to offer CDARS – a solution that provides multi-million-dollar FDIC insurance. Further information on the Bank can be obtained by visiting its website at mstreetbank.com.

This release contains forward-looking statements, including our expectations with respect to future events that are subject to various risks and uncertainties. The statements contained in this release that are not historical facts are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Words such as "may," "will," "could," "should," "expect," "plan," "project," "intend," "anticipate," "believe," "estimate," "predict," "potential," "pursuant," "target," "continue," and similar expressions are intended to identify such forward-looking statements. Factors that could cause actual results to differ materially from management's projections, forecasts, estimates and expectations include: fluctuation in market rates of interest and loan and deposit pricing, adverse changes in the overall national economy as well as adverse economic conditions in our specific market areas, future impacts of pandemic outbreaks, maintenance and development of well-established and valued client relationships and referral source relationships, and acquisition or loss of key production personnel. We caution readers that the list of factors above is not exclusive. The forward-looking statements are made as of the date of this release, and we may not undertake steps to update the forward-looking statements to reflect the impact of any circumstances or events that arise after the date the forward-looking statements are made. In addition, our past results of operations are not necessarily indicative of future performance.

UNAUDITED CONSOLIDATED BALANCE SHEET INFORMATION (In thousands)

	December 31, 2025		September 30, 2025		June 30, 2025		March 31, 2025		December 31, 2024*
ASSETS
Cash and due from banks	$	25,179	$	23,940	$	20,888	$	18,384	$	21,351
Interest-bearing deposits at other financial institutions		1,276		1,315		864		735		1,711
Federal funds sold		136,301		102,039		111,532		183,521		184,646
Total cash and cash equivalents		162,756		127,294		133,284		202,640		207,708
Investment securities available for sale (AFS), at fair value		56,454		58,338		56,138		55,935		55,747
Investment securities held to maturity (HTM), at amortized cost, net of allowance for credit losses of $0 for all periods		15,298		14,293		14,846		15,657		16,078
Restricted securities, at amortized cost		7,005		7,005		7,005		7,005		6,873
Loans, net of allowance for credit losses of $19,308, $18,831, $19,057, $19,460, and $19,450, respectively		1,841,833		1,788,243		1,767,432		1,811,789		1,810,556
Premises and equipment, net		13,530		13,212		13,344		13,020		13,287
Other real estate owned, net		1,697		—		—		—		—
Property held for sale, at fair value		2,806		3,225		3,225		—		—
Accrued interest and other receivables		14,518		13,622		15,023		9,607		11,311
Bank owned life insurance		40,752		40,433		40,117		39,809		39,507
Other assets		56,020		59,124		64,367		67,383		67,031
Total Assets	$	2,212,669	$	2,124,789	$	2,114,781	$	2,222,845	$	2,228,098
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities:
Non-interest bearing deposits	$	378,694	$	324,717	$	330,045	$	345,319	$	324,307
Interest-bearing demand deposits		119,407		123,231		124,090		106,033		139,780
Savings and NOW deposits		121,905		125,214		116,069		124,049		64,337
Money market deposits		499,334		458,946		463,904		511,925		560,082
Time deposits		779,844		778,727		764,439		820,999		819,288
Total deposits		1,899,184		1,810,835		1,798,547		1,908,325		1,907,794
Subordinated debt, net		69,936		69,837		71,238		72,138		73,039
Other liabilities		24,958		25,754		31,526		32,764		39,274
Total Liabilities		1,994,078		1,906,426		1,901,311		2,013,227		2,020,107
Stockholders' Equity:
Preferred stock		27,263		27,263		27,263		27,263		27,263
Common stock		29,008		29,833		29,825		29,810		29,466
Capital surplus		66,531		68,895		68,261		67,612		67,823
Retained earnings		101,557		98,793		95,585		92,305		91,150
Accumulated other comprehensive loss		(5,768)		(6,421)		(7,464)		(7,372)		(7,711)
Total Stockholders' Equity		218,591		218,363		213,470		209,618		207,991
Total Liabilities and Stockholders' Equity	$	2,212,669	$	2,124,789	$	2,114,781	$	2,222,845	$	2,228,098

*Derived from audited financial statements

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME (LOSS) INFORMATION (In thousands, except share and per share data)

	Year-to-Date				Three Months Ended
	December 31, 2025		December 31, 2024*		December 31, 2025		September 30, 2025		June 30, 2025		March 31, 2025		December 31, 2024
INTEREST INCOME:
Interest and fees on loans	$	124,211	$	125,177	$	29,969	$	30,688	$	32,443	$	31,111	$	31,323
Interest on investment securities
Taxable securities		1,707		1,693		421		435		431		420		431
Tax-exempt securities		1,076		1,093		276		270		267		263		262
Interest on interest-bearing deposits at other financial institutions		54		41		10		11		10		22		15
Interest on federal funds sold		4,540		6,611		1,198		1,060		1,135		1,147		3,088
Total interest income		131,588		134,615		31,874		32,464		34,286		32,963		35,119
INTEREST EXPENSE:
Interest on interest-bearing demand deposits		4,187		8,661		1,064		1,071		1,004		1,048		2,612
Interest on savings and NOW deposits		1,469		754		390		467		391		221		201
Interest on money market deposits		18,852		21,386		4,246		4,623		4,707		5,276		5,475
Interest on time deposits		34,239		37,364		8,244		8,369		8,595		9,031		10,003
Interest on federal funds purchased		93		575		—		28		—		65		—
Interest on Federal Home Loan Bank advances		—		46		—		—		—		—		—
Interest on subordinated debt		3,203		3,255		788		804		799		812		787
Total interest expense		62,043		72,041		14,732		15,362		15,496		16,453		19,078
Net interest income		69,545		62,574		17,142		17,102		18,790		16,510		16,041
Provision for credit losses		(70)		6,763		328		144		(543)		—		3,407
Net interest income after provision for credit losses		69,615		55,811		16,814		16,958		19,333		16,510		12,634
NON-INTEREST INCOME:
Deposit account service charges		2,184		1,996		559		557		538		530		481
Bank owned life insurance income		1,245		1,189		319		316		308		302		304
Gain on retirement of subordinated debt		273		—		—		145		68		60		—
Gain on equity securities		103		—		—		—		103		—		—
Net loss on securities called or matured		—		(48)		—		—		—		—		—
Other non-interest income		222		115		22		104		49		47		22
Total non-interest income		4,027		3,252		900		1,122		1,066		939		807
NON-INTEREST EXPENSES:
Salaries and employee benefits		31,587		30,475		7,557		7,366		8,279		8,385		8,253
Furniture and equipment expenses		3,840		3,636		884		799		1,141		1,016		830
Advertising and marketing		2,051		2,199		469		571		530		481		600
Occupancy expenses		1,407		1,614		293		400		318		396		358
Outside services		3,776		3,627		688		625		1,290		1,173		1,168
Administrative expenses		996		929		238		259		270		229		243
Computer software intangible impairment		—		19,721		—		—		—		—		19,721
Other operating expenses		10,894		10,766		2,696		2,647		2,917		2,634		3,258
Total non-interest expenses		54,551		72,967		12,825		12,667		14,745		14,314		34,431
Income (loss) before income tax expense (benefit)		19,091		(13,904)		4,889		5,413		5,654		3,135		(20,990)
Income tax expense (benefit)		3,478		(3,924)		836		896		1,064		682		(4,823)
Net income (loss)		15,613		(9,980)		4,053		4,517		4,590		2,453		(16,167)
Preferred stock dividends		2,156		2,156		539		539		539		539		539
Net income (loss) available to common shareholders	$	13,457	$	(12,136)	$	3,514	$	3,978	$	4,051	$	1,914	$	(16,706)
Earnings (loss) per common share, basic and diluted	$	1.76	$	(1.60)	$	0.46	$	0.52	$	0.53	$	0.25	$	(2.20)
Weighted average number of common shares, basic and diluted		7,652,504		7,606,391		7,564,723		7,704,639		7,704,677		7,636,191		7,603,318

*Derived from audited financial statements

UNAUDITED LOAN, DEPOSIT AND BORROWING DETAIL (In thousands)

	December 31, 2025					September 30, 2025					December 31, 2024					Percentage Change
	$ Amount		% of Total			$ Amount		% of Total			$ Amount		% of Total			Last 3 Mos			Last 12 Mos
LOANS:
Construction and land development loans	$	300,666		16.1	%	$	312,318		17.2	%	$	391,253		21.3	%		-3.7	%		-23.2	%
Residential real estate loans		441,578		23.7	%		411,592		22.7	%		438,745		23.9	%		7.3	%		0.6	%
Commercial real estate loans		1,014,933		54.4	%		981,091		54.2	%		898,204		48.9	%		3.4	%		13.0	%
Commercial and industrial loans		106,990		5.7	%		105,217		5.8	%		105,212		5.7	%		1.7	%		1.7	%
Consumer loans		1,148		0.1	%		1,204		0.1	%		1,574		0.2	%		-4.7	%		-27.1	%
Total Gross Loans	$	1,865,315		100.0	%	$	1,811,422		100.0	%	$	1,834,988		100.0	%		3.0	%		1.7	%
Less: Allowance for credit losses		(19,308)					(18,831)					(19,450)
Net deferred loan fees		(4,174)					(4,348)					(4,982)
Net Loans	$	1,841,833				$	1,788,243				$	1,810,556
DEPOSITS:
Non-interest bearing deposits	$	378,694		20.0	%	$	324,717		17.9	%	$	324,307		17.0	%		16.6	%		16.8	%
Interest-bearing deposits:
Demand deposits		119,407		6.3	%		123,231		6.8	%		139,780		7.3	%		-3.1	%		-14.6	%
Savings and NOW deposits		121,905		6.4	%		125,214		6.9	%		64,337		3.4	%		-2.6	%		89.5	%
Money market deposits		499,334		26.3	%		458,946		25.3	%		560,082		29.4	%		8.8	%		-10.8	%
Time deposit $250,000 or more		490,594		25.8	%		501,332		27.8	%		535,676		28.0	%		-2.1	%		-8.4	%
Time deposit less than $250,000		289,250		15.2	%		277,395		15.3	%		283,612		14.9	%		4.3	%		2.0	%
Total Deposits	$	1,899,184		100.0	%	$	1,810,835		100.0	%	$	1,907,794		100.0	%		4.9	%		-0.5	%
BORROWINGS:
Subordinated debt, net	$	69,936		100.0	%	$	69,837		100.0	%	$	73,039		100.0	%		0.1	%		-4.2	%
Total Borrowings	$	69,936		100.0	%	$	69,837		100.0	%	$	73,039		100.0	%		0.1	%		-4.2	%
Total Deposits and Borrowings	$	1,969,120				$	1,880,672				$	1,980,833					4.7	%		-0.6	%

Core customer funding sources ⁽¹⁾	$	1,400,678		71.1	%	$	1,289,952		68.6	%	$	1,439,657		72.7	%		8.6	%		-2.7	%
Brokered and listing service sources⁽²⁾		498,506		25.3	%		520,883		27.7	%		468,137		23.6	%		-4.3	%		6.5	%
Subordinated debt, net⁽³⁾		69,936		3.6	%		69,837		3.7	%		73,039		3.7	%		0.1	%		-4.2	%
Total Funding Sources	$	1,969,120		100.0	%	$	1,880,672		100.0	%	$	1,980,833		100.0	%		4.7	%		-0.6	%


(1)	Includes ICS, CDARS, and reciprocal deposits maintained by customers, which represent sweep accounts tied to customer operating accounts.
(2)	Consists of certificates of deposit (CD) through multiple listing services and multiple brokered deposit services, as well as ICS and CDARS one-way certificates of deposit and regional money market accounts. Excludes $145.2 million in core deposits placed in reciprocal networks for FDIC insurance coverage that will be classified as brokered deposits on the call report in pursuant to rule 12 CFR 337.6(e) as of December 31, 2025.
(3)	Subordinated debt obligation qualifies as Tier 2 capital at the holding company and Tier 1 capital at the Bank.

UNAUDITED AVERAGE BALANCE SHEETS, INTEREST AND RATES (In thousands)

	For the three months ended December 31, 2025							For the three months ended December 31, 2024
	Average Balance		Interest Income/ Expense ⁽³⁾⁽⁴⁾		Average Yields/ Rate (annualized) ⁽³⁾⁽⁴⁾			Average Balance		Interest Income/ Expense ⁽³⁾⁽⁴⁾		Average Yields/ Rate (annualized) ⁽³⁾⁽⁴⁾
ASSETS:
Interest-earning assets:
Loans ⁽¹⁾⁽²⁾	$	1,819,614	$	29,969		6.53	%	$	1,808,894	$	31,323		6.87	%
Securities:
Taxable		50,844		421		3.29	%		53,566		431		3.19	%
Tax-exempt		35,631		349		3.89	%		35,512		332		3.71	%
Interest-bearing deposits at other financial institutions		1,044		10		3.80	%		1,272		15		4.68	%
Federal funds sold		127,376		1,198		3.73	%		262,323		3,088		4.67	%
Total interest-earning assets	$	2,034,509	$	31,947		6.23	%	$	2,161,567	$	35,189		6.46	%
Other assets		123,757							129,077
Total assets	$	2,158,266						$	2,290,644
Liabilities and Stockholders' Equity:
Interest-bearing liabilities:
Interest-bearing demand deposits	$	125,673	$	1,064		3.36	%	$	231,496	$	2,612		4.48	%
Savings and NOW deposits		121,401		390		1.27	%		64,112		201		1.24	%
Money market deposits		467,891		4,246		3.60	%		514,235		5,475		4.22	%
Time deposits		786,801		8,244		4.16	%		809,924		10,003		4.90	%
Total interest-bearing deposits	$	1,501,766	$	13,944		3.68	%	$	1,619,767	$	18,291		4.48	%
Federal funds purchased		2		—		—			2		—		—
Subordinated debt, net		69,898		788		4.47	%		73,001		787		4.28	%
Total interest-bearing liabilities	$	1,571,666	$	14,732		3.72	%	$	1,692,770	$	19,078		4.47	%
Demand deposits and other liabilities		368,502							370,332
Total liabilities	$	1,940,168						$	2,063,102
Stockholders' Equity		218,098							227,542
Total Liabilities and Stockholders' Equity	$	2,158,266						$	2,290,644
Interest Rate Spread						2.51	%						1.99	%
Net Interest Income			$	17,215						$	16,111
Net Interest Margin						3.36	%						2.96	%


(1)	Includes loans classified as non-accrual
(2)	Total loan interest income includes amortization of deferred loan fees, net of deferred loan costs
(3)	Income and yields for all periods presented are reported on a tax-equivalent basis using the federal statutory rate of 21%
(4)	Refer to "Unaudited Reconciliation of Certain Non-GAAP Financial Measures" for reconciliation of non-GAAP measures

UNAUDITED AVERAGE BALANCE SHEETS, INTEREST AND RATES (In thousands)

	For the year ended December 31, 2025							For the year ended December 31, 2024
	Average Balance		Interest Income/ Expense ⁽³⁾⁽⁴⁾		Average Yields/ Rate (annualized) ⁽³⁾⁽⁴⁾			Average Balance		Interest Income/ Expense ⁽³⁾⁽⁴⁾		Average Yields/ Rate (annualized) ⁽³⁾⁽⁴⁾
ASSETS:
Interest-earning assets:
Loans ⁽¹⁾⁽²⁾	$	1,820,481	$	124,211	6.82		%	$	1,782,061	$	125,177	7.02		%
Securities:
Taxable		52,401		1,707	3.26		%		54,935		1,693	3.08		%
Tax-exempt		35,382		1,362	3.85		%		36,379		1,384	3.80		%
Interest-bearing deposits at other financial institutions		1,216		54	4.44		%		815		41	5.03		%
Federal funds sold		111,144		4,540	4.08		%		136,258		6,611	4.85		%
Total interest-earning assets	$	2,020,624	$	131,874	6.53		%	$	2,010,448	$	134,906	6.71		%
Other assets		120,810							126,138
Total assets	$	2,141,434						$	2,136,586
Liabilities and Stockholders' Equity:
Interest-bearing liabilities:
Interest-bearing demand deposits	$	117,493	$	4,187	3.56		%	$	181,109	$	8,661	4.78		%
Savings and NOW deposits		107,151		1,469	1.37		%		54,385		754	1.39		%
Money market deposit		486,945		18,852	3.87		%		464,400		21,386	4.61		%
Time deposits		785,378		34,239	4.36		%		748,938		37,364	4.99		%
Total interest-bearing deposits	$	1,496,967	$	58,747	3.92		%	$	1,448,832	$	68,165	4.70		%
Federal funds purchased		1,973		93	4.71		%		9,941		575	5.78		%
FHLB advances		—		—	—				820		46	5.61		%
Subordinated debt, net		71,223		3,203	4.50		%		72,852		3,255	4.47		%
Total interest-bearing liabilities	$	1,570,163	$	62,043	3.95		%	$	1,532,445	$	72,041	4.70		%
Demand deposits and other liabilities		358,146							379,510
Total liabilities	$	1,928,309						$	1,911,955
Stockholders' Equity		213,114							224,631
Total Liabilities and Stockholders' Equity	$	2,141,423						$	2,136,586
Interest Rate Spread						2.58	%						2.01	%
Net Interest Income			$	69,831						$	62,865
Net Interest Margin					3.46		%					3.13		%


(1)	Includes loans classified as non-accrual
(2)	Total loan interest income includes amortization of deferred loan fees, net of deferred loan costs
(3)	Income and yields for all periods presented are reported on a tax-equivalent basis using the federal statutory rate of 21%
(4)	Refer to "Unaudited Reconciliation of Certain Non-GAAP Financial Measures" for reconciliation of non-GAAP measures

UNAUDITED SUMMARY FINANCIAL DATA (Dollars in thousands except per share data)

	At or For the Three Months Ended						At or For the Year Ended
	December 31,						December 31,
	2025			2024			2025			2024
*Per share Data and Shares Outstanding*
Earnings (loss) per common share (basic and diluted)	$	0.46		$	(2.20)		$	1.76		$	(1.60)
Book value per common share	$	25.52		$	23.77		$	25.52		$	23.77
Tangible book value per common share ⁽²⁾	$	25.52		$	23.77		$	25.52		$	23.77
Weighted average common shares (basic and diluted)		7,564,723			7,603,318			7,652,504			7,606,391
Common shares outstanding at end of period		7,496,571			7,603,765			7,496,571			7,603,765
*Performance Ratios*
Return on average assets (annualized)		0.75	%		(2.80)	%		0.73	%		(0.47)	%
Return on average equity (annualized)		7.37	%		(28.19)	%		7.33	%		(4.44)	%
Return on average common equity (annualized)		7.31	%		(29.13)	%		7.24	%		(6.15)	%
Yield on earning assets (FTE)⁽²⁾ (annualized)		6.23	%		6.46	%		6.53	%		6.71	%
Cost of interest-bearing liabilities (annualized)		3.72	%		4.47	%		3.95	%		4.70	%
Net interest spread (FTE) ⁽²⁾ (annualized)		2.51	%		1.99	%		2.58	%		2.01	%
Net interest margin (FTE) ⁽²⁾(annualized)		3.36	%		2.96	%		3.46	%		3.13	%
Non-interest income as a percentage of average assets (annualized)		0.17	%		0.14	%		0.19	%		0.15	%
Non-interest expense to average assets (annualized)		2.36	%		5.96	%		2.55	%		3.42	%
Efficiency ratio ⁽³⁾		71.08	%		204.36	%		74.15	%		110.85	%
*Allowance for Credit Losses*
Allowance for credit losses (ACL)
Beginning balance, ACL - loans	$	18,831		$	18,327		$	19,450		$	16,506
Add: recoveries		2			9			834			28
Less: charge-offs		—			(2,151)			(858)			(4,569)
Add: provision for credit losses - loans		475			3,265			(118)			7,485
Ending balance, ACL - loans	$	19,308		$	19,450		$	19,308		$	19,450

Beginning balance, reserve for unfunded commitment (RUC)	$	482		$	145		$	287		$	1,009
Provision for unfunded commitments, net		(147)			142			48			(722)
Ending balance, RUC	$	335		$	287		$	335		$	287
Total allowance for credit losses	$	19,643		$	19,737		$	19,643		$	19,737

Allowance for credit losses on loans to total gross loans		1.04	%		1.06	%		1.04	%		1.06	%
Allowance for credit losses on loans to non-performing loans		58.19	%		89.84	%		58.19	%		89.84	%
Net charge-offs to average gross loans (annualized)		0.00	%		0.46	%		0.00	%		0.25	%
*Concentration Ratios*
Commercial real estate loans to total capital⁽⁴⁾		354.85	%		393.79	%		354.85	%		393.79	%
Construction loans to total capital⁽⁵⁾		98.06	%		131.92	%		98.06	%		131.92	%
*Past due and Non-performing Assets*
Loans 30-89 days past due and accruing to total gross loans		0.98	%		0.00	%		0.98	%		0.00	%
Loans 90 days past due and accruing to total gross loans		0.00	%		0.00	%		0.00	%		0.00	%
Non-accrual loans to total gross loans		1.69	%		1.18	%		1.69	%		1.18	%
Other real estate owned, net	$	1,697		$	—		$	1,697		$	—
Non-performing loans	$	31,482		$	21,650		$	31,482		$	21,650
Non-performing assets to total assets		1.50	%		0.97	%		1.50	%		0.97	%
*Regulatory Capital Ratios (Bank only)* *⁽¹⁾*
Total risk-based capital ratio		16.08	%		15.69	%		16.08	%		15.69	%
Tier 1 risk-based capital ratio		15.05	%		14.64	%		15.05	%		14.64	%
Leverage ratio		13.28	%		12.08	%		13.28	%		12.08	%
Common equity tier 1 ratio		15.05	%		14.64	%		15.05	%		14.64	%
*Other information*
Common shares closing stock price	$	20.36		$	18.10		$	20.36		$	18.10
Tangible equity / tangible assets		9.88	%		9.33	%		9.88	%		9.33	%
Average tangible equity / average tangible assets ⁽²⁾		10.11	%		9.21	%		9.95	%		9.80	%
Number of full time equivalent employees		174			204			174			204
Number of full service branch offices		6			6			6			6


(1)	Regulatory capital ratios as of December 31, 2025 are preliminary
(2)	Refer to "Unaudited Reconciliation of Certain Non-GAAP Financial Measures" for reconciliation of non-GAAP measures
(3)	Efficiency ratio is calculated as non-interest expense as a percentage of net interest income and non-interest income
(4)	Commercial real estate includes only non-owner occupied, multifamily, and construction loans as a percentage of Bank capital
(5)	Construction loans as a percentage of Bank capital

Unaudited Reconciliation of Certain Non-GAAP Financial Measures (Dollars In thousands)

	For the three months ended December 31,						For the year ended December 31,
	2025			2024			2025			2024
Net interest margin (FTE)
Net interest income (GAAP)	$	17,142		$	16,041		$	69,545		$	62,574
FTE adjustment on tax-exempt securities		73			70			286			291
Net interest income (FTE) (non-GAAP)		17,215			16,111			69,831			62,865

Average interest-earning assets		2,034,509			2,161,567			2,020,624			2,010,448
Net interest margin (GAAP)		3.34	%		2.94	%		3.44	%		3.11	%
Net interest margin (FTE) (non-GAAP)		3.36	%		2.96	%		3.46	%		3.13	%

	For the three months ended December 31,						For the year ended December 31,
	2025			2024			2025			2024
Yield on earning assets (FTE)
Total interest income (GAAP)	$	31,874		$	35,119		$	131,588		$	134,615
FTE adjustment on tax-exempt securities		73			70			286			291
Total interest income (FTE) (non-GAAP)		31,947			35,189			131,874			134,906

Average interest-earning assets		2,034,509			2,161,567			2,020,624			2,010,448
Yield on earning assets (GAAP)		6.22	%		6.45	%		6.51	%		6.70	%
Yield on earning assets (FTE) (non-GAAP)		6.23	%		6.46	%		6.53	%		6.71	%

	For the three months ended December 31,						For the year ended December 31,
	2025			2024			2025			2024
Net interest spread (FTE)
Yield on earning assets (GAAP)		6.22	%		6.45	%		6.51	%	6.70		%
Yield on earning assets (FTE) (non-GAAP)		6.23	%		6.46	%	6.53		%	6.71		%

Yield on interest-bearing liabilities (GAAP)		3.72	%		4.47	%	3.95		%	4.70		%

Net interest spread (GAAP)		2.50	%		1.98	%	2.56		%		2.00	%
Net interest spread (FTE) (non-GAAP)		2.51	%		1.99	%	2.58		%		2.01	%

	For the three months ended December 31,						For the year ended December 31,
	2025			2024			2025			2024
Average tangible stockholders' equity
Total average stockholders' equity (GAAP)	$	218,098		$	227,542		$	213,114		$	224,631
Less: average intangible assets		—			(18,327)			—			(16,989)
Total average tangible stockholders' equity (non-GAAP)		218,098			209,215			213,114			207,642

	For the three months ended December 31,						For the year ended December 31,
	2025			2024			2025			2024
Average tangible assets
Total average assets (GAAP)	$	2,158,266		$	2,290,644		$	2,141,434		$	2,136,586
Less: average intangible assets		—			(18,327)			—			(16,989)
Total average tangible assets (non-GAAP)		2,158,266			2,272,317			2,141,434			2,119,597

Contact: Billy Freesmeier

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(703) 481-4579

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SOURCE MainStreet Bancshares, Inc.