BY Byline Bancorp Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13G/A

Under the Securities Exchange Act of 1934

(Amendment No. 1)*

Byline Bancorp, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

124411109

(CUSIP Number)

September 30, 2024

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 124411109

Byline Bancorp, Inc. (the “Issuer”)

180 North LaSalle Street, Suite 300

Chicago, Illinois 60601

Estate of Daniel L. Goodwin

2901 Butterfield Road, Oak Brook, IL 606521

Illinois

Common Stock, par value $0.01 per share (“Common Stock”)

124411109

Not applicable.

The information required by this item is set forth in Rows 5 through 9 and 11 of the cover page to this Schedule 13G. The ownership percentage is based on 44,385,204 outstanding shares of Common Shares as of October 30, 2024, as reported in the Issuer’s Form 10-Q filed with the Securities and Exchange Commission on October 24, 2024.

The Estate of Daniel L. Goodwin (the “Estate”) holds 4,277,559 shares of Common Stock, and a limited liability company affiliated with the Estate holds 4,651 shares of Common Stock. In addition, an affiliate of the Estate indirectly owns the managing interest of the indirect parent of holding companies that hold, or have the right to acquire, 25,056 shares of Common Stock. The Estate disclaims beneficial ownership of the shares of Common Stock held by the LLC and by the holding companies.

If this statement is being filed to report the fact that as of the date hereof the Reporting Persons have ceased to be the beneficial owner of more than five percent of the class of securities, check the following ☐.

Not applicable.

Not applicable.

Not applicable.

Not applicable.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.