BYLINE BANCORP, INC.

For the period ended Sep 30, 2025. Filed Nov 7, 2025.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Nov 7, 2025

BY$38.82+1.8%Stored close · as of Nov 9, 2026

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Contents

Item 6. Exhibits

	EXHIBIT
Number	Description
3.1	Amended and Restated Certificate of Incorporation (filed as Exhibit 3.1 to the Company’s Registration Statement on Form S-1, as amended (File No. 333-218362) filed on June 19, 2017 and incorporated herein by reference)
3.2	Amended and Restated Bylaws (filed as Exhibit 3.2 to the Company’s Registration Statement on Form S-1, as amended (File No. 333-218362) filed on June 19, 2017 and incorporated herein by reference)
4.1	Certain instruments defining the rights of holders of long-term debt securities of the registrant and its subsidiaries are omitted pursuant to Item 601(b)(4)(iii) of Regulation S-K. The registrant hereby undertakes to furnish to the SEC, upon request, copies of any such instruments.
31.1	Certification of the Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, and Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of the Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, and Section 302 of the Sarbanes-Oxley Act of 2002
32.1(a)	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	Financial information from the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025, formatted in Inline XBRL interactive data files pursuant to Rule 405 of Regulation S-T: (i) Condensed Consolidated Statements of Condition; (ii) Condensed Consolidated Statements of Operations; (iii) Condensed Consolidated Statements of Comprehensive Income (Loss); (iv) Condensed Consolidated Statements of Changes in Stockholders’ Equity; (v) Condensed Consolidated Statements of Cash Flows; and (vi) Notes to Condensed Consolidated Financial Statements
104	Cover Page Interactive Data File – the cover page XBRL tags are embedded with the Inline XBRL document.

(a)

This exhibit shall not be deemed "filed" for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act.

SIGNAT URES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Byline Bancorp, Inc.
Date: November 7, 2025	By:	/s/	Roberto R. Herencia
			Roberto R. Herencia
			Chief Executive Officer
			(Principal Executive Officer)
Date: November 7, 2025	By:	/s/	Thomas J. Bell III
			Thomas J. Bell III
			Executive Vice President, Chief Financial Officer and Treasurer
			(Principal Financial Officer)

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.