First Amendment to First Amended and Restated Revolving Credit Agreement, dated as of October 8, 2021, by and between Byline Bancorp, Inc. and CIBC Bank USA

FIRST AMENDMENT TO

FIRST AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT

THIS FIRST AMENDMENT TO FIRST AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT is dated October 8, 2021 (the “First Amendment”), and is by and between Byline Bancorp, Inc., a Delaware corporation (“Borrower”), with offices at 180 N. LaSalle Street, 3rd Floor, Chicago, IL 60601, and CIBC Bank USA, an Illinois chartered bank (together with successors and assigns, the “Lender”), with offices at 120 S. LaSalle Street, Chicago, IL 60603, as further identified below.

RECITALS:

A. The Borrower and the Lender have heretofore executed a First Amended and Restated Revolving Credit Agreement dated October 9, 2020 (as amended from time to time, collectively, the “Loan Agreement”), which may be further amended from time to time, and the Borrower (and if applicable, certain third parties) have executed a Negative Pledge Agreement dated October 11, 2018, as amended by First Amendment thereto dated October 9, 2020, a Fifth Amended Revolving Note dated October 9, 2020, and the collateral documents which may or may not be identified in the Agreement and certain other related documents (collectively, together with the Loan Agreement, the “Loan Documents”), setting forth the terms and conditions upon which the Borrower may obtain revolving loans from time to time up to the maximum amount originally of Fifteen Million and 00/100ths Dollars ($15,000,000.00) (the “Loan Amount”), as may be amended from time to time.

B. The Borrower requested and the Lender has agreed to extend the maturity date and to make certain modifications to the Loan Agreement and Loan Documents as described below.

C. The Lender has agreed to such modifications, but only on the terms and conditions outlined in this First Amendment.

AGREEMENTS:

““Revolving Loan Maturity Date” means the earlier to occur of October 7, 2022 or the Termination Date.”

The Borrower has executed a Sixth Amended Revolving Note to reflect that the Revolving Loan Maturity Date is October 7, 2022.

“Notwithstanding anything herein to the contrary, in no event shall the interest rate in option (a) or option (b) be less than two and 00/100ths percent (2.00%) per annum.”

“3.1.3. Rates. Lender does not warrant, nor accept responsibility, nor shall Lender have any liability with respect to the administration, submission or any other matter related to the rates in the definition of “LIBOR Rate” or with respect to any comparable or successor rate thereto (including any Benchmark Replacement) or the effect of any of the foregoing, or of any Benchmark Replacement Conforming Changes, including without limitation, whether the composition or characteristics of any such alternative,

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successor or replacement reference rate will be similar to, or produce the same value or economic equivalence of, the LIBOR Rate or have the same volume or liquidity as did the London interbank offered rate prior to its discontinuance or unavailability.”

“6.9 Benchmark Replacement Setting. Notwithstanding anything to the contrary herein or in any other Loan Document (and any Hedging Agreement shall be deemed not to be a “Loan Document” for purposes of this Section):

(a) Replacing USD LIBOR. On March 5, 2021 the Financial Conduct Authority (“FCA”), the regulatory supervisor of USD LIBOR’s administrator (“IBA”), announced in a public statement the future cessation or loss of representativeness of overnight/Spot Next, 1-month, 3-month, 6-month and 12-month USD LIBOR tenor settings. On the earlier of (i) the date that all Available Tenors of USD LIBOR have either permanently or indefinitely ceased to be provided by IBA or have been announced by the FCA pursuant to public statement or publication of information to be no longer representative and (ii) the Early Opt-in Effective Date, if the then-current Benchmark is USD LIBOR, the Benchmark Replacement will replace such Benchmark for all purposes hereunder and under any Loan Document in respect of any setting of such Benchmark on such day and all subsequent settings without any amendment to, or further action or consent of any other party to this Agreement or any other Loan Document. If the Benchmark Replacement is Daily Simple SOFR, all interest payments will be payable on a quarterly basis.

(b) Replacing Future Benchmarks. Upon the occurrence of a Benchmark Transition Event, the Benchmark Replacement will replace the then-current Benchmark for all purposes hereunder and under any Loan Document in respect of any Benchmark setting at or after 5:00 p.m. on the fifth (5th) Business Day after the date notice of such Benchmark Replacement is provided to the Borrower without any amendment to this Agreement or any other Loan Document, or further action or consent of the Borrower. At any time that the administrator of the then-current Benchmark has permanently or indefinitely ceased to provide such Benchmark or such Benchmark has been announced by the regulatory supervisor for the administrator of such Benchmark pursuant to public statement or publication of information to be no longer representative of the underlying market and economic reality that such Benchmark is intended to measure and that representativeness will not be restored, the Borrower may revoke any request for a borrowing of, conversion to or continuation of Loans to be made, converted or continued that would bear interest by reference to such Benchmark until Borrower’s receipt of notice from Lender that a Benchmark Replacement has replaced such Benchmark, and, failing that, Borrower will be deemed to have converted any such request into a request for a borrowing of or conversion to ABR Loans. During the period referenced in the foregoing sentence, the component of ABR based upon the Benchmark will not be used in any determination of ABR.

(c) Benchmark Replacement Conforming Changes. In connection with the implementation and administration of a Benchmark Replacement, Lender will have the right to make Benchmark Replacement Conforming Changes from time to time and, notwithstanding anything to the contrary herein or in any other Loan Document, any amendments implementing such Benchmark Replacement Conforming Changes will become effective without any further action or consent of any other party to this Agreement.

(d) Notices; Standards for Decisions and Determinations. Lender will promptly notify the Borrower of (i) the implementation of any Benchmark Replacement and (ii) the effectiveness of any Benchmark Replacement Conforming Changes. Any determination, decision or election that may be made by Lender pursuant to this Section, including any determination with respect to a tenor, rate or adjustment or of the occurrence or non-occurrence of an event, circumstance or date and any decision to take or refrain from taking any action, will be conclusive and binding absent manifest error and may be made in its sole discretion and without consent from any other party hereto, except, in each case, as expressly required pursuant to this Section.

(e) Unavailability of Tenor of Benchmark. At any time (including in connection with the implementation of a Benchmark Replacement), (i) if the then-current Benchmark is a term rate (including Term SOFR or USD

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LIBOR), then Lender may remove any tenor of such Benchmark that is unavailable or non-representative for Benchmark (including Benchmark Replacement) settings and (ii) Lender may reinstate any such previously removed tenor for Benchmark (including Benchmark Replacement) settings.

(f) Definitions.

“Available Tenor” means, as of any date of determination and with respect to the then-current Benchmark, as applicable, (x) if the then-current Benchmark is a term rate, any tenor for such Benchmark that is or may be used for determining the length of an Interest Period or (y) otherwise, any payment period for interest calculated with reference to such Benchmark, as applicable, pursuant to this Agreement as of such date.

“Benchmark” means, initially, USD LIBOR; provided that if a replacement of the Benchmark has occurred pursuant to this Section titled “Benchmark Replacement Setting”, then “Benchmark” means the applicable Benchmark Replacement to the extent that such Benchmark Replacement has replaced such prior benchmark rate. Any reference to “Benchmark” shall include, as applicable, the published component used in the calculation thereof.

“Benchmark Replacement” means, for any Available Tenor:

(1) For purposes of clause (a) of this Section, the first alternative set forth below that can be determined by Lender:

(a) the sum of: (i) Term SOFR and (ii) 0.11448% (11.448 basis points) for an Available Tenor of one-month’s duration, 0.26161% (26.161 basis points) for an Available Tenor of three-months’ duration, and 0.42826% (42.826 basis points) for an Available Tenor of six-months’ duration, or

(b) the sum of: (i) Daily Simple SOFR and (ii) the spread adjustment selected or recommended by the Relevant Governmental Body for the replacement of the tenor of USD LIBOR with a SOFR-based rate having approximately the same length as the interest payment period specified in clause (a) of this Section; and

(2) For purposes of clause (b) of this Section, the sum of (a) the alternate benchmark rate and (b) an adjustment (which may be a positive or negative value or zero), in each case, that has been selected by Lender as the replacement for such Available Tenor of such Benchmark giving due consideration to any evolving or then-prevailing market convention, including any applicable recommendations made by the Relevant Governmental Body, for U.S. dollar-denominated syndicated or bilateral credit facilities at such time;

provided that, if the Benchmark Replacement as determined pursuant to clause (1) or (2) above would be less than the Floor, the Benchmark Replacement will be deemed to be the Floor for the purposes of this Agreement and the other Loan Documents.

“Benchmark Replacement Conforming Changes” means, with respect to any Benchmark Replacement, any technical, administrative or operational changes (including changes to the definition of “ABR,” the definition of “Business Day,” the definition of “Interest Period,” timing and frequency of determining rates and making payments of interest, timing of borrowing requests or prepayment, conversion or continuation notices, the applicability and length of lookback periods, the applicability of breakage provisions, and other technical, administrative or operational matters) that Lender decides may be appropriate to reflect the adoption and implementation of such Benchmark Replacement and to permit the administration thereof by Lender in a manner substantially consistent with market practice (or, if Lender decides that adoption of any portion of such market practice is not administratively feasible or if Lender determines that no market practice for the administration of such Benchmark Replacement exists, in such other manner of administration as Lender decides is reasonably necessary in connection with the administration of this Agreement and the other Loan Documents).

“Benchmark Transition Event” means, with respect to any then-current Benchmark other than USD LIBOR, the occurrence of a public statement or publication of information by or on behalf of the administrator of the

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then-current Benchmark, the regulatory supervisor for the administrator of such Benchmark, the Board of Governors of the Federal Reserve System, the Federal Reserve Bank of New York, an insolvency official with jurisdiction over the administrator for such Benchmark, a resolution authority with jurisdiction over the administrator for such Benchmark or a court or an entity with similar insolvency or resolution authority over the administrator for such Benchmark, announcing or stating that (a) such administrator has ceased or will cease on a specified date to provide all Available Tenors of such Benchmark, permanently or indefinitely, provided that, at the time of such statement or publication, there is no successor administrator that will continue to provide any Available Tenor of such Benchmark or (b) all Available Tenors of such Benchmark are or will no longer be representative of the underlying market and economic reality that such Benchmark is intended to measure and that representativeness will not be restored.

“Daily Simple SOFR” means, for any day, SOFR, with the conventions for this rate (which will include a lookback) being established by Lender in accordance with the conventions for this rate recommended by the Relevant Governmental Body for determining “Daily Simple SOFR” for bilateral business loans; provided, that if Lender decides that any such convention is not administratively feasible for Lender, then Lender may establish another convention in its reasonable discretion.

“Early Opt-in Effective Date” means, with respect to any Early Opt-in Election, the sixth (6th) Business Day after the date notice of such Early Opt-in Election is provided to the Borrower.

“Early Opt-in Election” means the occurrence of:

(1) a determination by Lender that at least ten currently outstanding U.S. dollar-denominated syndicated or bilateral credit facilities at such time contain (as a result of amendment or as originally executed) a SOFR-based rate (including SOFR, a term SOFR or any other rate based upon SOFR) as a benchmark rate, and

(2) the election by Lender to trigger a fallback from USD LIBOR and the provision by Lender of written notice of such election to Borrower.

“Floor” means the benchmark rate floor, if any, provided in this Agreement initially (as of the execution of this Agreement, the modification, amendment or renewal of this Agreement or otherwise) with respect to USD LIBOR.

“Relevant Governmental Body” means the Board of Governors of the Federal Reserve System or the Federal Reserve Bank of New York, or a committee officially endorsed or convened by the Board of Governors of the Federal Reserve System or the Federal Reserve Bank of New York, or any successor thereto.

“SOFR” means a rate per annum equal to the secured overnight financing rate for such Business Day published by the Federal Reserve Bank of New York (or a successor administrator of the secured overnight financing rate) on the website of the Federal Reserve Bank of New York, currently at http://www.newyorkfed.org (or any successor source for the secured overnight financing rate identified as such by the administrator of the secured overnight financing rate from time to time).

“Term SOFR” means, for the applicable corresponding tenor, the forward-looking term rate based on SOFR that has been selected or recommended by the Relevant Governmental Body.

“USD LIBOR” means the London interbank offered rate for U.S. dollars.

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Dated: October 8, 2021.

BORROWER:

Byline Bancorp, Inc., a Delaware corporation, successor by merger to Byline Bancorp, Inc, an Illinois corporation

By: /s/ Alberto J. Paracchini

Name/ Title: Alberto Paracchini, President

NEGATIVE PLEDGE AFFIRMATION AND CONSENT

BYLINE BANCORP, INC., a Delaware corporation, successor by merger to Byline Bancorp, Inc, an Illinois corporation, its capacity as Borrower under the Negative Pledge Agreement, as may be amended, hereby consents to and agrees to the terms of the foregoing First Amendment, as of the day and year first above written.

Byline Bancorp, Inc., a Delaware corporation, successor by merger to Byline Bancorp, Inc, an Illinois corporation

By: /s/ Alberto J. Paracchini

Name/ Title: Alberto Paracchini, President

ACCEPTED AND AGREED TO: LENDER:

CIBC BANK USA

By:

Name: ____________________________________

Title:

[signature page of First Amendment]

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SIXTH AMENDED REVOLVING NOTE

$15,000,000.00 October 8, 2021

Chicago, Illinois

THE UNDERSIGNED, Byline Bancorp, Inc., a Delaware corporation (the “Borrower”), for value received, promises to pay to the order of CIBC Bank USA (the “Lender”) at its principal office in Chicago, Illinois, the aggregate unpaid amount of all Revolving Loans made to the undersigned by Lender pursuant to the Loan Agreement referred to below (as shown on the schedule attached hereto (and any continuation thereof) or in the records of Lender), such principal amount to be payable on the dates set forth in the Loan Agreement.

The Borrower further promises to pay interest on the unpaid principal amount of the Loan from the date of such Loan until such Loan is paid in full, payable at the rate(s) and at the time(s) set forth in the Loan Agreement. Payments of both principal plus interest are to be made in lawful money of the United States of America.

This Note evidences indebtedness incurred under, and is subject to the terms and provisions of, the Amended and Restated Revolving Credit Agreement, dated as of October 9, 2020 (as amended, restated, supplemented or otherwise modified from time to time, the “Loan Agreement”), between the Borrower and Lender, to which Loan Agreement reference is hereby made for a statement of the terms and provisions under which this Note may or must be paid prior to its due date or its due date accelerated. The remaining outstanding principal balance of this Note, together with all accrued and unpaid interest, shall be due and payable on the Revolving Loan Maturity Date, which is October 7, 2022. Terms not otherwise defined herein are used herein as defined in the Loan Agreement. This Sixth Amended Revolving Note (“Sixth Amended Note”) is an amendment to and restatement, without novation or satisfaction, of that certain Fifth Amended Revolving Note dated on or about October 9, 2020 (the “Original Note”). Accordingly, Borrower acknowledges that all amounts presently due and owing under the Original Note shall be deemed transferred to and be advanced under this Sixth Amended Note.

If any attorney is engaged by Lender to enforce or defend any provision of this Note or any of the other Loan Documents, or as a consequence of any Event of Default, with or without the filing of any legal action or proceeding, then Borrower shall pay to Lender immediately upon demand all attorneys' fees and expenses, together with interest thereon from the date of such demand until paid at the rate of interest applicable to the principal balance owing hereunder as if such unpaid attorneys' fees and expenses had been added to the principal.

No previous waiver and no failure or delay by Lender in acting with respect to the terms of this Note or any of the other Loan Documents shall constitute a waiver of any breach, default or failure of condition under this Note, the Loan Agreement or any of the other Loan Documents or the obligations secured thereby. A waiver of any term of this Note or any of the other Loan Documents or of any of the obligations secured thereby must be made in writing and shall be limited to the express written terms of such waiver. In the event of any inconsistencies between the terms of this Note and the terms of any other document related to the Loan evidenced by this Note, the terms of this Note shall prevail.

Except as otherwise provided in the Loan Agreement, Borrower expressly waives presentment, demand, notice of dishonor, notice of default or delinquency, notice of acceleration, notice of protest and nonpayment, notice of costs, expenses or losses and interest thereon, notice of late charges, and diligence in taking any action to collect any sums owing under this Note or in proceeding against any of the rights or interests in or to properties securing payment of this Note. In addition, Borrower

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expressly agrees that this Note and any payment coming due hereunder may be extended from time to time without in any way affecting the liability of any such party hereunder.

Time is of the essence with respect to every provision hereof. This Note shall be construed and enforced in accordance with the laws of the State of Illinois, except to the extent that federal laws preempt the laws of the State of Illinois, and all persons and entities in any manner obligated under this Note consent to the jurisdiction of any Federal or State court located in Chicago, Illinois having proper venue and also consent to service of process by any means authorized by Illinois or Federal law. Any reference contained herein to attorneys' fees and expenses shall be deemed to be to reasonable fees and expenses and to include all reasonable fees and expenses of in-house or staff attorneys and the reasonable fees and expenses of any other experts or consultants.

All agreements between Borrower and Lender (including, without limitation, this Note and the Loan Agreement, and any other documents securing all or any part of the indebtedness evidenced hereby) are expressly limited so that in no event whatsoever shall the amount paid or agreed to be paid to Lender exceed the highest lawful rate of interest permissible under applicable law. If, from any circumstances whatsoever, fulfillment of any provision hereof, the Loan Agreement or any other documents securing all or any part of the indebtedness evidenced hereby at the time performance of such provisions shall be due, shall involve exceeding the limit of validity prescribed by law which a court of competent jurisdiction may deem applicable hereto, then, ipso facto, the obligation to be fulfilled shall be reduced to the highest lawful rate of interest permissible under such applicable laws, and if, for any reason whatsoever, Lender shall ever receive as interest an amount which would be deemed unlawful under such applicable law, such interest shall be automatically applied to the payment of the principal of this Note (whether or not then due and payable) and not to the payment of interest or refunded to Borrower if such principal has been paid in full.

Any notice which either party hereto may be required or may desire to give hereunder shall be governed by the notice provisions of the Loan Agreement.

BORROWER HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVES ANY RIGHT THAT IT MAY HAVE TO A TRIAL BY JURY IN ANY LITIGATION ARISING IN ANY WAY IN CONNECTION WITH THIS REVOLVING NOTE OR ANY OF THE OTHER LOAN DOCUMENTS, OR ANY OTHER STATEMENTS OR ACTIONS OF BORROWER OR LENDER. BORROWER ACKNOWLEDGES THAT IT HAS BEEN REPRESENTED IN THE SIGNING OF THIS NOTE AND IN THE MAKING OF THIS WAIVER BY INDEPENDENT LEGAL COUNSEL SELECTED OF ITS OWN FREE WILL, AND THAT IT HAS DISCUSSED THIS WAIVER WITH SUCH LEGAL COUNSEL. BORROWER FURTHER ACKNOWLEDGES THAT (i) IT HAS READ AND UNDERSTANDS THE MEANING AND RAMIFICATIONS OF THIS WAIVER, (ii) THIS WAIVER HAS BEEN REVIEWED BY BORROWER AND BORROWER'S COUNSEL AND IS A MATERIAL INDUCEMENT FOR LENDER TO ENTER INTO THE LOAN DOCUMENTS, AND (iii) THIS WAIVER SHALL BE EFFECTIVE AS TO EACH OF THE LOAN DOCUMENTS AS IF FULLY INCORPORATED THEREIN.

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IN WITNESS WHEREOF, the undersigned has executed this Note or caused this Note to be executed by its duly authorized representative as of the date first above written.

Borrower:

Byline Bancorp, Inc., a Delaware corporation

By: /s/ Alberto J. Paracchini

Name/ Title: Alberto Paracchini, President

Signature Page to Note

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