Byline Bancorp Investor Presentation — March 2024

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1Q24 Earnings Presentation

2Forward -Looking Statements

Forward -Looking Statements

This communication contains forward -looking statements within the meaning of the U.S. federal securities laws. Forward -looking s tatements include, without limitation, statements concerning

plans, estimates, calculations, forecasts and projections with respect to the anticipated future performance of the Company. The se 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 comparab le 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 sub jective judgement 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 respective affilia tes, 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

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 D ecember 31, 2023. 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 t he federal securities laws. Due to rounding, numbers presented

throughout this document may not add up precisely to the totals provided and percentages may not precisely reflect the absolu te figures.

Reported(1)(2)Adjusted(1)(2)

Reported(1)(2)Adjusted(1)(2)ROTCE$0.70 $0.70