Net income of $41.8 million, $0.94 diluted earnings per share

Byline Bancorp, Inc. (NYSE:BY), today reported:

		At or for the quarter					Third Quarter Highlights *(compared to 2Q26 unless specified)*
		3Q26	2Q26		3Q25
Financial Results ($ in thousands)							• Delivered record total revenue of $121.0 million,
Net interest income (NII)	$	103,676	$	100,836	$	99,890	up 2.8% and 4.6% Y/Y
Non-interest income		17,332		16,876		15,845
Total revenue⁽¹⁾		121,008		117,712		115,735	• EPS of $0.94, up 4.4% and 14.6% Y/Y
Non-interest expense (NIE)		59,800		56,479		60,518
Pre-tax pre-provision net income (PTPP)⁽¹⁾		61,208		61,233		55,217	• ROAA of 1.67%; ROTCE⁽¹⁾ of 14.78%
Provision for credit losses		6,748		7,162		5,298
Provision for income taxes		12,674		13,890		12,719	• PTPP ROAA of 2.45%⁽¹⁾, marking the 16th
Net income	$	41,786	$	40,181	$	37,200	consecutive quarter above 2.00%

Per Share							• TBVPS⁽¹⁾ of $24.14, down 1.4% and up 6.9% Y/Y
Diluted earnings per share (EPS)	$	0.94	$	0.90	$	0.82
Dividends declared per common share		0.14		0.12		0.10	*Income Statement*
Book value per common share		28.55		28.86		26.99	• Record NII of $103.7 million, up 2.8%
Tangible book value per common share (TBVPS)⁽¹⁾		24.14		24.48		22.58
							• NIM expanded five bps to 4.33%
Balance Sheet & Credit Quality ($ in thousands)
Total deposits	$	8,039,110	$	7,870,762	$	7,828,197	• Non-interest income of $17.3 million, up 2.7%
Total loans and leases		7,490,395		7,563,929		7,461,321
Net charge-offs		5,846		4,446		7,107	• Effective tax rate of 23.3%, reflecting impact
Allowance for credit losses (ACL)		113,040		111,861		105,717	of tax credits
ACL to total loans and leases held for investment		1.51%		1.48%		1.42%
							• Efficiency ratio⁽¹⁾ of 48.40%
Select Ratios (annualized where applicable)
Efficiency ratio⁽¹⁾		48.40%		46.93%		51.00%	*Balance Sheet*
Return on average assets (ROAA)		1.67%		1.63%		1.52%	• Total deposit growth of $168.3 million, or 8.5%⁽²⁾
Return on average stockholders' equity		12.34%		12.05%		12.21%
Return on average tangible common equity (ROTCE)⁽¹⁾		14.78%		14.47%		15.11%	• Reduced wholesale funding by $268.7 million
Net interest margin (NIM)		4.33%		4.28%		4.27%
Common equity to total assets		12.88%		13.13%		12.61%	• Lowered loan/deposit ratio to 93.22%
Tangible common equity to tangible assets⁽¹⁾		11.12%		11.36%		10.78%
Common equity tier 1		13.29%		12.92%		12.15%	• Total payout ratio⁽³⁾of 63.2%

CEO/President Commentary

Roberto R. Herencia, Executive Chairman and CEO of Byline Bancorp, commented, "We delivered record earnings and returned more than $20 million of capital to stockholders through share repurchases and a 16.7% increase in our common dividend to $0.14 per share during the third quarter. We also continued to advance our strategic priorities with the recently announced acquisition of Illinois State Bancorp, Inc., parent of First Nations Bank and The Bank of Bourbonnais. The transaction expands our market presence, strengthens our core deposit base, and adds talented bankers and long-standing customer relationships."

Alberto J. Paracchini, President of Byline Bancorp, added, "The third quarter produced record net interest income of $103.7 million and expanded our net interest margin by five basis points to 4.33% in a quarter when funding costs rose across the industry. Pre-tax, pre-provision return on average assets was 2.45%. Deposits grew at an 8.5% annualized rate while our cost of deposits rose three basis points. We believe our strong capital position provides the flexibility to support growth, capitalize on market opportunities, and create long-term value as we pursue our vision of becoming the preeminent commercial bank in Chicago."

(1)		Represents non-GAAP financial measures. See "Reconciliation of non-GAAP Financial Measures" for a reconciliation to the most directly comparable GAAP financial measure.
(2)		Annualized.
(3)		Total payout ratio is inclusive of common dividends and common share repurchases divided by net income.

Board Declares Cash Dividend of $0.14 per Share

On October 6, 2026, the Company's Board of Directors declared a cash dividend of $0.14 per share. The dividend will be paid on November 17, 2026, to stockholders of record of the Company's common stock as of November 3, 2026.

STATEMENTS OF OPERATIONS HIGHLIGHTS

Net Interest Income

Net interest income for the third quarter of 2026 was $103.7 million, an increase of $2.8 million, or 2.8%, from the second quarter of 2026. The increase in net interest income was primarily attributable to higher interest income from investment securities, lower interest expense on other borrowings resulting from reduced wholesale funding levels, and the additional day in the quarter, partially offset by higher interest expense on deposits.

Net interest margin for the third quarter of 2026 was 4.33%, an increase of five basis points compared to the second quarter of 2026. The increase was primarily attributable to higher yields on investment securities and lower Federal Home Loan Bank advances, partially offset by higher rates paid on deposits. Net loan accretion income contributed six basis points to the net interest margin for the quarter, compared to 11 basis points in the prior quarter.

The average cost of total deposits was 1.95% for the third quarter of 2026, an increase of three basis points compared to the second quarter of 2026, primarily due to higher rates paid on interest-bearing accounts.

Provision for Credit Losses

The provision for credit losses was $6.7 million for the third quarter of 2026, a decrease of $414,000, or 5.8%, compared to $7.2 million for the second quarter of 2026. The decrease was primarily attributable to improvements in collateral-related qualitative factors, reflecting favorable trends in certain industry indicators, as well as lower period-end loan and lease balances held for investment. These factors were partially offset by increased reserves associated with certain individually evaluated loans.

Non-interest Income

Non-interest income for the third quarter of 2026 was $17.3 million, an increase of $456,000, or 2.7%, compared to $16.9 million for the second quarter of 2026. The increase was primarily driven by higher bank-owned life insurance income, customer swap activity, and wealth management and trust income, partially offset by lower loan servicing asset revaluation and net gains on sales of loans, as well as less favorable equity securities fair value changes.

Net gains on sales of loans totaled $5.8 million for the quarter, a decrease of $293,000, or 4.8%, compared to the prior quarter. During the third quarter of 2026, we sold $70.8 million of U.S. government guaranteed loans compared to $78.1 million during the second quarter of 2026.

Non-interest Expense

Non-interest expense for the third quarter of 2026 was $59.8 million, an increase of $3.3 million, or 5.9%, compared to $56.5 million for the second quarter of 2026. The increase in non-interest expense was mainly due to a $3.4 million increase in salaries and employee benefits and higher other non-interest expense and legal, audit and other professional fees. These increases were partially offset by lower advertising and promotions expense and lower impairment charges on assets held for sale.

Our efficiency ratio was 48.40%⁽¹⁾compared to 46.93%⁽¹⁾ for the second quarter of 2026, an increase of 147 basis points. The change in the efficiency ratio was mainly driven by higher non-interest expenses.

Income Taxes

We recorded income tax expense of $12.7 million during the third quarter of 2026, compared to $13.9 million during the second quarter of 2026. The effective tax rates were 23.3% and 25.7% for the third quarter of 2026 and second quarter of 2026, respectively. The decrease was primarily driven by the purchase of renewable energy tax credits during the third quarter.

STATEMENTS OF FINANCIAL CONDITION HIGHLIGHTS

Assets

Total assets were $9.9 billion as of September 30, 2026, a decrease of $33.7 million, or 0.3%, compared to June 30, 2026. The decrease was primarily driven by an $80.9 million decrease in loans and leases held for investment, reflecting loan payoffs and sales that exceeded portfolio growth during the quarter, partially offset by increases in cash and cash equivalents, securities available-for-sale and loans held for sale.

Allowance for Credit Losses

The ACL was $113.0 million as of September 30, 2026, an increase of $1.2 million, or 1.1%, from June 30, 2026. The increase was driven by provision for credit losses on individually assessed loans and net charge-offs on loans and leases. The ACL as a percentage of total loans and leases held for investment increased by three basis points to 1.51%, compared to 1.48% at June 30, 2026.

Net loan and lease charge-offs during the third quarter of 2026 were $5.8 million, or 0.31% of average loans and leases on an annualized basis, an increase of $1.4 million or seven basis points, compared to the second quarter of 2026.

Asset Quality

Non-performing assets were $87.9 million, or 0.89% of total assets, as of September 30, 2026, an increase of $15.6 million, or 21.6%, from June 30, 2026. The increase was primarily attributable to an increase in non-accrual loans and leases. The government guaranteed portion of non-performing loans included in non-performing assets was $9.7 million at September 30, 2026, compared to $8.1 million at June 30, 2026, an increase of $1.5 million, or 18.7%.

Deposits and Other Liabilities

Total deposits increased $168.3 million, up 2.1%, or 8.5% annualized, to $8.0 billion at September 30, 2026 from $7.9 billion as of June 30, 2026. The increase was primarily driven by growth in non-interest-bearing demand deposits, interest-bearing accounts and time deposits, partially offset by lower money market and savings account balances.

Total borrowings and other liabilities were $584.4 million at September 30, 2026, a decrease of $173.1 million, or 22.8%, from $757.5 million at June 30, 2026. The decrease for the quarter was primarily driven by lower Federal Home Loan Bank advances.

Stockholders’ Equity

Total stockholders’ equity was $1.3 billion at September 30, 2026, a decrease of $29.0 million, or 2.2%, from June 30, 2026. The decrease was primarily driven by an increase in accumulated other comprehensive loss related to available-for-sale securities, common share repurchases and dividends declared, partially offset by net income of $41.8 million.

During the quarter ended September 30, 2026, we repurchased 521,980 shares of our common stock.

Conference Call, Webcast and Slide Presentation

We will host a conference call and webcast at 9:00 a.m. Central Time on Friday, October 23, 2026, to discuss our quarterly financial results. Analysts and investors may participate in the question-and-answer session. The call can be accessed via telephone at (833) 461-5787; Meeting ID: 511 124 815

A slide presentation relating to our third quarter 2026 results will be accessible prior to the conference call. The slide presentation and webcast of the conference call can be accessed on our investor relations website at www.bylinebancorp.com.

About Byline Bancorp, Inc.

Headquartered in Chicago, Byline Bancorp, Inc. is the parent company of Byline Bank, a full service commercial bank serving small- and medium-sized businesses, financial sponsors, and consumers. Byline Bank has approximately $9.9 billion in assets and operates 44 branch locations throughout the Chicago and Milwaukee metropolitan areas. Byline Bank offers a broad range of commercial and community banking products and services including small ticket equipment leasing solutions and is one of the top Small Business Administration lenders in the United States.

Forward-Looking Statements

This communication contains forward-looking statements within the meaning of the U.S. federal securities laws. Forward-looking statements include, without limitation, statements concerning plans, estimates, calculations, forecasts and projections with respect to the anticipated future performance of the Company. These statements are often, but not always, made through the use of words or phrases such as ‘‘may’’, ‘‘might’’, ‘‘should’’, ‘‘could’’, ‘‘predict’’, ‘‘potential’’, ‘‘believe’’, ‘‘expect’’, ‘‘continue’’, ‘‘will’’, ‘‘anticipate’’, ‘‘seek’’, ‘‘estimate’’, ‘‘intend’’, ‘‘plan’’, ‘‘projection’’, ‘‘would’’, ‘‘annualized’’, "target" and ‘‘outlook’’, or the negative version of those words or other comparable words or phrases of a future or forward-looking nature. Forward-looking statements involve estimates and known and unknown risks, and reflect various assumptions and involve elements of subjective judgment and analysis, which may or may not prove to be correct, and which are subject to uncertainties and contingencies outside the control of Byline and its affiliates, directors, employees and other representatives, which could cause actual results to differ materially from those presented in this communication.

No representations, warranties or guarantees are or will be made by Byline as to the reliability, accuracy or completeness of any forward-looking statements contained in this communication or that such forward-looking statements are or will remain based on reasonable assumptions. You should not place undue reliance on any forward-looking statements contained in this communication.

Certain risks and important factors that could affect Byline’s future results are identified in our Annual Report on Form 10-K and other reports we file with the Securities and Exchange Commission, including among other things under the heading "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2025. Any forward-looking statement speaks only as of the date on which it is made, and Byline undertakes no obligation to update any forward-looking statement, whether to reflect events or circumstances after the date on which the statement is made, to reflect new information or the occurrence of unanticipated events, or otherwise unless required under the federal securities laws.

BYLINE BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (unaudited)

	September 30,			June 30,			September 30,
(dollars in thousands)	2026			2026			2025
ASSETS
Cash and due from banks	$	54,221		$	77,159		$	70,406
Interest bearing deposits with other banks		164,454			116,400			190,774
Cash and cash equivalents		218,675			193,559			261,180
Equity and other securities, at fair value		1,897			7,476			10,461
Securities available-for-sale, at fair value		1,640,029			1,616,748			1,512,194
Restricted stock, at cost		10,269			18,777			15,934
Loans held for sale		28,878			21,518			20,566
Loans and leases:
Loans and leases		7,461,517			7,542,411			7,440,755
Allowance for credit losses - loans and leases		(113,040	)		(111,861	)		(105,717	)
Net loans and leases		7,348,477			7,430,550			7,335,038
Servicing assets, at fair value		19,242			19,291			19,019
Premises and equipment, net		55,735			55,981			58,785
Other real estate owned, net		2,781			3,153			4,220
Goodwill and other intangible assets, net		196,815			198,050			202,014
Bank-owned life insurance		108,940			109,414			106,575
Deferred tax assets, net		57,124			40,624			49,918
Accrued interest receivable and other assets		209,918			217,324			216,471
Total assets	$	9,898,780		$	9,932,465		$	9,812,375
LIABILITIES AND STOCKHOLDERS’ EQUITY
LIABILITIES
Non-interest-bearing demand deposits	$	1,872,965		$	1,826,739		$	1,932,869
Interest-bearing deposits		6,166,145			6,044,023			5,895,328
Total deposits		8,039,110			7,870,762			7,828,197
Other borrowings		272,629			460,449			361,286
Subordinated notes, net		73,995			73,967			148,971
Junior subordinated debentures issued to capital trusts, net		72,016			71,814			71,272
Accrued expenses and other liabilities		165,788			151,258			164,967
Total liabilities		8,623,538			8,628,250			8,574,693
STOCKHOLDERS’ EQUITY
Common stock		471			471			471
Additional paid-in capital		758,540			756,361			758,089
Retained earnings		748,048			712,588			615,784
Treasury stock		(98,874	)		(78,627	)		(56,959	)
Accumulated other comprehensive loss, net of tax		(132,943	)		(86,578	)		(79,703	)
Total stockholders’ equity		1,275,242			1,304,215			1,237,682
Total liabilities and stockholders’ equity	$	9,898,780		$	9,932,465		$	9,812,375

BYLINE BANCORP, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited)

	Three Months Ended
(dollars in thousands,	September 30,			June 30,			September 30,
except per share data)	2026			2026			2025
INTEREST AND DIVIDEND INCOME
Interest and fees on loans and leases	$	128,969		$	127,524		$	132,401
Interest on securities		15,042			14,426			13,289
Other interest and dividend income		3,581			2,356			2,936
Total interest and dividend income		147,592			144,306			148,626
INTEREST EXPENSE
Deposits		39,284			37,338			42,857
Other borrowings		1,750			3,273			1,502
Subordinated notes and debentures		2,882			2,859			4,377
Total interest expense		43,916			43,470			48,736
Net interest income		103,676			100,836			99,890
PROVISION FOR CREDIT LOSSES		6,748			7,162			5,298
Net interest income after provision for credit losses		96,928			93,674			94,592
NON-INTEREST INCOME
Fees and service charges on deposits		2,925			2,853			2,741
Loan servicing revenue		3,062			3,047			3,062
Loan servicing asset revaluation		(1,791	)		(1,126	)		(1,294	)
ATM and interchange fees		1,289			1,377			1,015
Net gains (losses) on sales of securities available-for-sale		—			21			—
Change in fair value of equity securities, net		218			814			(298	)
Net gains on sales of loans		5,802			6,095			6,981
Wealth management and trust income		1,394			1,270			1,366
Other non-interest income		4,433			2,525			2,272
Total non-interest income		17,332			16,876			15,845
NON-INTEREST EXPENSE
Salaries and employee benefits		39,069			35,656			37,492
Occupancy and equipment expense, net		3,872			4,065			4,531
Impairment charge on assets held for sale		—			496			—
Loan and lease related expenses		832			752			1,274
Legal, audit, and other professional fees		3,578			3,231			3,876
Data processing		4,773			4,866			4,903
Net loss (gain) recognized on other real estate owned and other related expenses		93			137			617
Other intangible assets amortization expense		1,235			1,235			1,494
Other non-interest expense		6,348			6,041			6,331
Total non-interest expense		59,800			56,479			60,518
INCOME BEFORE PROVISION FOR INCOME TAXES		54,460			54,071			49,919
PROVISION FOR INCOME TAXES		12,674			13,890			12,719
NET INCOME	$	41,786		$	40,181		$	37,200
EARNINGS PER COMMON SHARE
Basic	$	0.94		$	0.90		$	0.82
Diluted	$	0.94		$	0.90		$	0.82

BYLINE BANCORP, INC. AND SUBSIDIARIES
SELECTED FINANCIAL DATA (unaudited)

	As of or For the Three Months Ended
(dollars in thousands, except share	September 30,			June 30,			September 30,
and per share data)	2026			2026			2025
Earnings per Common Share
Basic earnings per common share	$	0.94		$	0.90		$	0.82
Diluted earnings per common share	$	0.94		$	0.90		$	0.82
Adjusted diluted earnings per common share⁽¹⁾⁽³⁾	$	0.94		$	0.91		$	0.83
Weighted average common shares outstanding (basic)		44,265,063			44,596,967			45,102,828
Weighted average common shares outstanding (diluted)		44,541,961			44,789,192			45,372,602
Common shares outstanding		44,674,518			45,191,493			45,859,977
Cash dividends per common share	$	0.14		$	0.12		$	0.10
Dividend payout ratio on common stock		14.89	%		13.33	%		12.20	%
Book value per common share	$	28.55		$	28.86		$	26.99
Tangible book value per common share⁽¹⁾	$	24.14		$	24.48		$	22.58
Key Ratios and Performance Metrics (annualized where applicable)
Net interest margin		4.33	%		4.28	%		4.27	%
Net interest margin, fully taxable equivalent ⁽¹⁾⁽⁴⁾		4.33	%		4.29	%		4.28	%
Average cost of deposits		1.95	%		1.92	%		2.16	%
Efficiency ratio⁽¹⁾⁽²⁾		48.40	%		46.93	%		51.00	%
Adjusted efficiency ratio^(1)(2)(3)		48.40	%		46.51	%		50.27	%
Non-interest income to total revenues⁽¹⁾		14.32	%		14.34	%		13.69	%
Non-interest expense to average assets		2.39	%		2.29	%		2.47	%
Adjusted non-interest expense to average assets⁽¹⁾⁽³⁾		2.39	%		2.27	%		2.44	%
Return on average stockholders' equity		12.34	%		12.05	%		12.21	%
Adjusted return on average stockholders' equity⁽¹⁾⁽³⁾		12.34	%		12.16	%		12.42	%
Return on average assets		1.67	%		1.63	%		1.52	%
Adjusted return on average assets⁽¹⁾⁽³⁾		1.67	%		1.65	%		1.54	%
Pre-tax pre-provision return on average assets⁽¹⁾		2.45	%		2.49	%		2.25	%
Adjusted pre-tax pre-provision return on average assets⁽¹⁾⁽³⁾		2.45	%		2.51	%		2.29	%
Return on average tangible common stockholders' equity⁽¹⁾		14.78	%		14.47	%		15.11	%
Adjusted return on average tangible common stockholders' equity⁽¹⁾⁽³⁾		14.78	%		14.60	%		15.36	%
Non-interest-bearing deposits to total deposits		23.30	%		23.21	%		24.69	%
Loans and leases held for sale and loans and leases held for investment to total deposits		93.17	%		96.10	%		95.31	%
Deposits to total liabilities		93.22	%		91.22	%		91.29	%
Deposits per branch	$	182,707		$	178,881		$	173,960
Asset Quality Ratios
Non-performing loans and leases to total loans and leases held for investment, net before ACL		1.14	%		0.92	%		0.85	%
Total non-performing assets as a percentage of total assets		0.89	%		0.73	%		0.69	%
ACL to total loans and leases held for investment, net before ACL		1.51	%		1.48	%		1.42	%
Net charge-offs to average total loans and leases held for investment, net before ACL - loans and leases		0.31	%		0.24	%		0.38	%
Capital Ratios
Common equity to total assets		12.88	%		13.13	%		12.61	%
Tangible common equity to tangible assets⁽¹⁾		11.12	%		11.36	%		10.78	%
Leverage ratio		12.90	%		12.79	%		12.20	%
Common equity tier 1 capital ratio		13.29	%		12.92	%		12.15	%
Tier 1 capital ratio		14.27	%		13.88	%		13.12	%
Total capital ratio		16.37	%		15.96	%		15.81	%

(1)		Represents a non-GAAP financial measure. See "Reconciliation of non-GAAP Financial Measures" for a reconciliation of our non-GAAP measures to the most directly comparable GAAP financial measure.
(2)		Represents non-interest expense less amortization of intangible assets divided by net interest income and non-interest income.
(3)		Calculation excludes secondary public offering of common stock expense and impairment charges on assets held for sale.
(4)		Interest income and rates include the effects of a tax equivalent adjustment to adjust tax exempt investment income on tax exempt investment securities to a fully taxable basis, assuming a federal income tax rate of 21%.

BYLINE BANCORP, INC. AND SUBSIDIARIES
QUARTER-TO-DATE STATEMENT OF AVERAGE INTEREST-EARNING ASSETS AND AVERAGE INTEREST-BEARING LIABILITIES (unaudited)

	For the Three Months Ended
	September 30, 2026								June 30, 2026								September 30, 2025
(dollars in thousands)	Average Balance⁽⁵⁾			Interest Inc / Exp		Avg. Yield / Rate			Average Balance⁽⁵⁾			Interest Inc / Exp		Avg. Yield / Rate			Average Balance⁽⁵⁾			Interest Inc / Exp		Avg. Yield / Rate
ASSETS
Cash and cash equivalents	$	211,540		$	1,756		3.29	%	$	145,381		$	1,132		3.12	%	$	193,683		$	1,878		3.84	%
Loans and leases⁽¹⁾		7,449,374			128,969		6.87	%		7,472,818			127,524		6.84	%		7,355,958			132,401		7.14	%
Taxable securities		1,729,277			16,236		3.72	%		1,707,484			14,978		3.52	%		1,585,013			13,491		3.38	%
Tax-exempt securities⁽²⁾		118,992			798		2.66	%		131,354			850		2.60	%		153,424			1,084		2.80	%
Total interest-earning assets	$	9,509,183		$	147,759		6.16	%	$	9,457,037		$	144,484		6.13	%	$	9,288,078		$	148,854		6.36	%
Allowance for credit losses - loans and leases		(114,389	)							(111,021	)							(109,877	)
All other assets		528,742								536,969								538,719
TOTAL ASSETS	$	9,923,536							$	9,882,985							$	9,716,920
LIABILITIES AND STOCKHOLDERS’ EQUITY
Deposits
Interest checking	$	1,299,949		$	7,470		2.28	%	$	1,050,011		$	5,048		1.93	%	$	834,763		$	3,682		1.75	%
Money market accounts		2,709,522			17,480		2.56	%		2,854,519			18,585		2.61	%		2,986,541			23,468		3.12	%
Savings		483,203			130		0.11	%		490,500			130		0.11	%		495,506			136		0.11	%
Time deposits		1,650,495			14,204		3.41	%		1,624,667			13,575		3.35	%		1,654,056			15,571		3.73	%
Total interest-bearing deposits		6,143,169			39,284		2.54	%		6,019,697			37,338		2.49	%		5,970,866			42,857		2.85	%
Other borrowings		283,922			1,750		2.45	%		442,187			3,273		2.97	%		307,457			1,502		1.94	%
Subordinated notes and debentures		145,898			2,882		7.84	%		145,672			2,859		7.87	%		190,074			4,377		9.14	%
Total borrowings		429,820			4,632		4.28	%		587,859			6,132		4.18	%		497,531			5,879		4.69	%
Total interest-bearing liabilities	$	6,572,989		$	43,916		2.65	%	$	6,607,556		$	43,470		2.64	%	$	6,468,397		$	48,736		2.99	%
Non-interest-bearing demand deposits		1,856,218								1,792,439								1,888,693
Other liabilities		150,967								145,406								151,540
Total stockholders’ equity		1,343,362								1,337,584								1,208,290
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	9,923,536							$	9,882,985							$	9,716,920
Net interest spread⁽³⁾							3.51	%							3.49	%							3.37	%
Net interest income, fully taxable equivalent				$	103,843							$	101,014							$	100,118
Net interest margin, fully taxable equivalent^(2)(4)(6)							4.33	%							4.29	%							4.28	%
Less: Tax-equivalent adjustment					167		0.00	%					178		0.01	%					228		0.01	%
Net interest income				$	103,676							$	100,836							$	99,890
Net interest margin⁽⁴⁾							4.33	%							4.28	%							4.27	%

Net loan accretion impact on margin				$	1,534		0.06	%				$	2,476		0.11	%				$	2,528		0.11	%

(1)		Loan and lease balances are net of deferred origination fees and costs and initial direct costs. Non-accrual loans and leases are included in total loan and lease balances.
(2)		Interest income and rates include the effects of a tax equivalent adjustment to adjust tax exempt investment income on tax exempt investment securities to a fully taxable basis, assuming a federal income tax rate of 21%.
(3)		Represents the average rate earned on interest-earning assets minus the average rate paid on interest-bearing liabilities.
(4)		Represents net interest income (annualized) divided by total average earning assets.
(5)		Average balances are average daily balances.

BYLINE BANCORP, INC. AND SUBSIDIARIES
SELECTED BALANCE SHEET TABLES AND FINANCIAL RATIOS (unaudited)

The following table presents our allocation of originated, purchased credit deteriorated (PCD), and acquired non-credit-deteriorated loans and leases at the dates indicated:

	September 30, 2026						June 30, 2026						September 30, 2025
(dollars in thousands)	Amount			% of Total			Amount			% of Total			Amount			% of Total
Originated loans and leases:
Commercial real estate	$	2,390,641			32.0	%	$	2,303,785			30.5	%	$	2,234,986			30.0	%
Residential real estate		638,538			8.6	%		575,062			7.6	%		552,984			7.4	%
Construction, land development, and other land		237,851			3.2	%		344,578			4.6	%		412,032			5.6	%
Commercial and industrial		3,070,144			41.1	%		3,120,209			41.3	%		2,804,434			37.7	%
Installment and other		4,324			0.1	%		4,817			0.1	%		2,431			0.0	%
Leasing financing receivables		695,456			9.3	%		721,090			9.6	%		750,531			10.1	%
Total originated loans and leases	$	7,036,954			94.3	%	$	7,069,541			93.7	%	$	6,757,398			90.8	%
Purchased credit deteriorated loans:
Commercial real estate	$	50,926			0.7	%	$	59,161			0.8	%	$	71,359			1.0	%
Residential real estate		15,549			0.2	%		18,941			0.2	%		24,061			0.3	%
Construction, land development, and other land		2,689			0.0	%		2,674			0.0	%		2,513			0.0	%
Commercial and industrial		5,332			0.1	%		5,633			0.1	%		19,193			0.3	%
Installment and other		64			0.0	%		66			0.0	%		81			0.0	%
Total purchased credit deteriorated loans	$	74,560			1.0	%	$	86,475			1.1	%	$	117,207			1.6	%
Acquired non-credit-deteriorated loans and leases:
Commercial real estate	$	136,720			1.9	%	$	152,230			2.0	%	$	215,801			2.9	%
Residential real estate		143,173			1.9	%		148,709			2.0	%		178,896			2.4	%
Construction, land development, and other land		—			—			—			—			50,493			0.7	%
Commercial and industrial		67,086			0.9	%		80,537			1.1	%		106,827			1.4	%
Installment and other		3,024			0.0	%		4,919			0.1	%		14,133			0.2	%
Total acquired non-credit-deteriorated loans and leases	$	350,003			4.7	%	$	386,395			5.2	%	$	566,150			7.6	%
Total loans and leases	$	7,461,517			100.0	%	$	7,542,411			100.0	%	$	7,440,755			100.0	%
Allowance for credit losses - loans and leases		(113,040	)					(111,861	)					(105,717	)
Total loans and leases, net of allowance for credit losses - loans and leases	$	7,348,477					$	7,430,550					$	7,335,038

The following table presents the balance and activity within the allowance for credit losses - loans and leases for the periods indicated:

	Three Months Ended
	September 30,			June 30,			September 30,
(dollars in thousands)	2026			2026			2025
ACL - loans and leases, beginning of period	$	111,861		$	108,879		$	107,727
Provision for credit losses - loans and leases		7,025			7,428			5,097
Net charge-offs - loans and leases		(5,846	)		(4,446	)		(7,107	)
ACL - loans and leases, end of period	$	113,040		$	111,861		$	105,717
Net charge-offs - loans and leases to average total loans and leases held for investment, net before ACL (annualized)		0.31	%		0.24	%		0.38	%
Provision for credit losses - loans and leases to net charge-offs - loans and leases during the period		1.20	x		1.67	x		0.72	x

BYLINE BANCORP, INC. AND SUBSIDIARIES
SELECTED BALANCE SHEET TABLES AND FINANCIAL RATIOS (unaudited)

The following table presents the amounts of non-performing loans and leases, other real estate owned, and past due loans and leases 90 days or more and still accruing interest, at the date indicated:

										September 30, 2026
										Change from
(dollars in thousands)	September 30, 2026			June 30, 2026			September 30, 2025			June 30, 2026			September 30, 2025
Non-performing assets:
Non-performing loans and leases	$	85,077		$	69,087		$	63,158			23.1	%		34.7	%
Other real estate owned		2,781			3,153			4,220			(11.8	)%		(34.1	)%
Total non-performing assets	$	87,858		$	72,240		$	67,378			21.6	%		30.4	%
Total non-performing loans and leases as a percentage of total loans and leases		1.14	%		0.92	%		0.85	%
Total non-performing assets as a percentage of total assets		0.89	%		0.73	%		0.69	%
Allowance for credit losses - loans and lease as a percentage of non-performing loans and leases		132.87	%		161.91	%		167.38	%

Non-performing assets guaranteed by U.S. government:
Non-accrual loans guaranteed	$	9,657		$	8,136		$	8,417			18.7	%		14.7	%
Total non-performing loans guaranteed	$	9,657		$	8,136		$	8,417			18.7	%		14.7	%
Total non-performing loans and leases not guaranteed as a percentage of total loans and leases		1.01	%		0.81	%		0.74	%
Total non-performing assets not guaranteed as a percentage of total assets		0.79	%		0.65	%		0.60	%

Past due loans and leases 90 days or more and accruing interest:
Past due leases 90 days or more and accruing interest	$	544		$	1,114		$	—			(51.2	)%		100.0	%
Total past due loans and leases 90 days or more and accruing interest	$	544		$	1,114		$	—			(51.2	)%		100.0	%
Total past due loans and leases 90 days or more and accruing as a percentage of total loans and leases		0.01	%		0.01	%		—

The following table presents the composition of deposits at the dates indicated:

							September 30, 2026
							Change from
(dollars in thousands)	September 30, 2026		June 30, 2026		September 30, 2025		June 30, 2026			September 30, 2025
Non-interest-bearing demand deposits	$	1,872,965	$	1,826,739	$	1,932,869		2.5	%		(3.1	)%
Interest-bearing checking accounts		1,346,583		1,229,287		868,922		9.5	%		55.0	%
Money market demand accounts		2,692,285		2,710,183		2,957,995		(0.7	)%		(9.0	)%
Other savings		474,333		489,415		488,894		(3.1	)%		(3.0	)%
Time deposits (below $250,000)		1,163,972		1,152,305		1,151,764		1.0	%		1.1	%
Time deposits ($250,000 and above)		488,972		462,833		427,753		5.6	%		14.3	% <

Byline Bancorp, Inc. Reports Third Quarter 2026 Financial Results