Byline Bancorp Investor Presentation — September 2021

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Investor Presentation –September 2021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 anticipa ted 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 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 r espective affiliates, directors,

employees and other representatives, which could cause actual results to differ materially from those presented in this commu nication.

The COVID -19 pandemic is adversely affecting us, our employees, customers, counterparties and third -party service providers, and the ultimate extent of

the impacts on our business, financial position, results of operations, liquidity, and prospects is uncertain. Deterioration in general business and economic

conditions, including increases in unemployment rates or turbulence in U.S. or global financial markets, could adversely affect our revenues and the values

of our assets and liabilities, reduce the availability of funding, and lead to a tightening of credit and further increase st ockprice volatility. In addition,

changes to statutes, regulations, or regulatory policies or practices as a result of, or in response to COVID-19, could affect u s in substantial and unpredictable

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.

2A Leading Chicago Commercial Banking Franchise

3Loan & DepositBY at a Glance ($mm)

Tangible Common Equity(1)Total Loans

Total DepositsTotal Assets$6,541