Byline Bancorp Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation, Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): August 7, 2025

BYLINE BANCORP, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

(State or Other Jurisdiction

of Incorporation)

(773) 244-7000

(Registrant’s Telephone Number, Including Area Code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01. Entry into a Material Definitive Agreement.

On August 7, 2025, Byline Bancorp, Inc. (the “Company”) entered into a Subordinated Note Purchase Agreement (the “Purchase Agreement”) with certain institutional accredited investors and qualified institutional buyers (the “Purchasers”) pursuant to which the Company sold and issued $75.0 million in aggregate principal amount of its 6.875% Fixed-to-Floating Rate Subordinated Notes due 2035 (the “Notes”). The Notes were issued by the Company to the Purchasers at a price equal to 100% of their face amount. The Company intends to use the net proceeds it received from the sale of the Notes to redeem $75.0 million of outstanding 6.000% Fixed-to-Floating Subordinated Notes due 2030. The Purchase Agreement contains certain customary representations, warranties and covenants made by the Company, on the one hand, and the Purchasers, severally and not jointly, on the other hand.

The Notes have a stated maturity of August 15, 2035 and are redeemable by the Company, at its option, in whole or in part, on or after August 15, 2030, and at any time upon the occurrences of certain events. The Notes will bear interest at a fixed rate of 6.875% per year, from and including August 7, 2025 to, but excluding August 15, 2030 or earlier redemption date. From and including August 15, 2030 to, but excluding the maturity date or early redemption date, the interest rate will reset quarterly to an interest rate per annum equal to the then current three-month term secured overnight financing rate (“SOFR”), plus 322 basis points. As provided in the Notes, the interest rate on the Notes during the applicable floating rate period may be determined based on a rate other than three-month term SOFR.

The Notes were offered and sold by the Company in a private placement transaction in reliance on exemptions from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), pursuant to Section 4(a)(2) of the Securities Act and Rule 506(b) of Regulation D thereunder. On August 7, 2025, in connection with the sale and issuance of the Notes, the Company entered into a Registration Rights Agreement (the “Registration Rights Agreement”) with the Purchasers. Under the terms of the Registration Rights Agreement, the Company has agreed to take certain actions to provide for the exchange of the Notes for subordinated notes that are registered under the Securities Act and have substantially the same terms as the Notes (the “Exchange Offer”). Under certain circumstances, if the Company fails to meet its obligations under the Registration Rights Agreement, it would be required to pay additional interest to the holders of the Notes.

The Notes were issued under an Indenture, dated August 7, 2025 (the “Indenture”), by and between the Company and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”). The Notes are not subject to any sinking fund and are not convertible into or exchangeable, other than pursuant to the Exchange Offer, for any other securities or assets of the Company or any of its subsidiaries. The Notes are not subject to redemption at the option of the holder. Prior to August 15, 2030, the Company may redeem the Notes, in whole but not in part, only under certain limited circumstances set forth in the Indenture. On or after August 15, 2030, the Company may redeem the Notes, in whole or in part, at its option, on any interest payment date. Any redemption by the Company would be at a redemption price equal to 100% of the principal amount of the Notes being redeemed, together with any accrued and unpaid interest on the Notes being redeemed to but excluding the date of redemption.

Principal and interest on the Notes are subject to acceleration only in limited circumstances in the case of certain bankruptcy and insolvency-related events with respect to the Company. The Notes are unsecured, subordinated obligations of the Company, are not obligations of, and are not guaranteed by, any subsidiary of the Company, and rank junior in right of payment to the Company’s current and future senior indebtedness. The Notes are intended to qualify as Tier 2 capital of the Company for regulatory capital purposes.

The forms of the Purchase Agreement, the Registration Rights Agreement, the Indenture and the Notes are attached as Exhibits 10.1, 10.2, 4.1 and 4.2, respectively, to this Current Report on Form 8-K (the “Report”) and are incorporated herein by reference. The foregoing descriptions of the Purchase Agreement, the Registration Rights Agreement, the Indenture and the Notes are summaries and are qualified in their entirety by reference to the full text of such documents.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information set forth under Item 1.01 above is incorporated by reference into this Item 2.03.

Item 7.01 Regulation FD Disclosure.

On August 7, 2025, the Company issued a press release announcing the completion of the offering of the Notes, a copy of which is furnished as Exhibit 99.1 to this Report.

In connection with the offering of the Notes, the Company delivered an investor presentation to potential investors on a confidential basis, a copy of which is furnished as Exhibit 99.2 to this Report.

The information contained in this Item 7.01 and Exhibits 99.1 and 99.2 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of such

section, nor will such information be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act, except as may be expressly set forth by specific reference in such filing.

Cautionary Note Regarding Forward-Looking Statements

This communication contains forward-looking statements within the meaning of the U.S. federal securities laws. Forward-looking statements include, without limitation, statements concerning plans, estimates, calculations, forecasts and projections with respect to the anticipated 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 judgment 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 respective affiliates, directors, employees and other representatives, which could cause actual results to differ materially from those presented in this communication.

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.

Certain risks and important factors that could affect Byline’s future results are identified in our Annual Report on Form 10-K and other reports we file with the Securities and Exchange Commission, including among other things under the heading “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2024. Any forward-looking statement speaks only as of the date on which it is made, and Byline undertakes no obligation to update any forward-looking statement, whether to reflect events or circumstances after the date on which the statement is made, to reflect new information or the occurrence of unanticipated events, or otherwise unless required under the federal securities laws.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

SIGNATURE

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