March 7, 2018
VIA EDGAR
United States Securities and Exchange Commission
Division of Corporation Finance
100 F Street, N.E.
Washington, D.C. 20549
Attention: | Ms. Era Anagnosti |
| Mr. Christopher Dunham |
Re: | Byline Bancorp, Inc. |
| Request for Acceleration of Effectiveness of Form S-4 |
| SEC File No. 333- 222935 (“Registration Statement”) |
Dear Mr. Dunham:
On behalf of Byline Bancorp, Inc., as registrant, the undersigned officer hereby requests that the effective date for the Registration Statement, as amended, be accelerated so that it will become effective at 11:00 a.m. (Washington, D.C. time), or as soon as practicable thereafter, on Friday, March 9, 2018.
Feel free to telephone Jennifer Durham King of Vedder Price P.C., the registrant’s legal counsel, at (312) 609-7835 with any questions or comments.
| Very truly yours, |
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| Byline Bancorp, Inc. |
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| /s/ Lindsay Y. Corby |
| Lindsay Y. Corby |
| Chief Financial Officer |
