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OSBC · Current Report (Form 8-K) · Filed March 4, 2026

Old Second Bancorp Inc — Current Report (Form 8-K)

Form
8-K
Filed
March 4, 2026
Period
Mar 4, 2026
Ticker
OSBC
Accession
0000357173-26-000014
Boardroom Alpha · Filing insights

Old Second Bancorp to redeem $30M of 2031 subordinated notes on April 15, 2026; 100% principal and accrued interest; Fed non-objection.

About Old Second Bancorp Inc
Market cap
$1.1B
1Y TSR
+25.7%
3Y TSR
+18.1%
Board grade
B+
Sector
Financial Services
CEO
James Eccher
Last annual meeting: May 19, 2026 · View full Old Second Bancorp Inc profile →
OLD SECOND BANCORP INC_March 4, 2026

I

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): March 4, 2026

Graphic

(Exact name of registrant as specified in its charter)

Delaware

000-10537

36-3143493

(State or other jurisdiction of incorporation)

(Commission File Number)

(I.R.S. Employer Identification No.)

37 South River Street
Aurora, Illinois 60507
(Address of principal executive offices) (Zip code)

(630) 892-0202
(Registrant’s telephone number, including area code)

N/A

(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):

  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock

OSBC

The Nasdaq Stock Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 under the Securities Act (17 CFR 230.405) or Rule 12b-2 under the Exchange Act (17 CFR 240.12b-2).

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 8.01 Other Events

On March 4, 2026, Old Second Bancorp, Inc. (the “Company”) notified U.S. Bank National Association, as paying agent (the “Paying Agent”), of its intention to redeem (the “Redemption”), on April 15, 2026 (the “Redemption Date”), $30,000,000 aggregate principal amount of its outstanding 3.50% Fixed-to-Floating Rate Subordinated Notes due 2031 (CUSIP No. 680277AC4), originally issued on April 6, 2021 (the “Notes”). The Notes will be redeemed at a cash redemption price equal to 100% of the aggregate principal amount of the Notes being redeemed, plus accrued and unpaid interest thereon to, but excluding, the Redemption Date (the “Redemption Price”). Upon completion of the Redemption, $30,000,000 aggregate principal amount of the Notes will remain outstanding.

The Company has received non-objection from the Federal Reserve Bank of Chicago with respect to the Redemption.

Payment of the Redemption Price will be made on the Redemption Date only upon presentation and surrender of the Notes to the Paying Agent. Notes held in book-entry form will be redeemed and the Redemption Price paid in accordance with the applicable procedures of The Depository Trust Company. Interest on the Notes called for redemption will cease to accrue on and after the Redemption Date. Notice of redemption will be delivered to the registered holders of the Notes in accordance with the terms governing the Notes.

Cautionary Statement Regarding Forward Looking Statements

Statements included in this Current Report on Form 8-K that are not historical facts are intended to be, and are hereby identified as, forward-looking statements for purposes of the safe harbor provided by Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements generally include words such as “expects,” “anticipates,” “intends,” “estimates,” and similar expressions. The Company cautions readers that forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those anticipated. Such risks and uncertainties include, among others, the factors disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with the Securities and Exchange Commission on February 26, 2026, and in the Company’s subsequent filings with the Securities and Exchange Commission. The Company undertakes no obligation to update any forward-looking statements to reflect events or circumstances after the date of this report.

Signature

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 hereunto duly authorized.

OLD SECOND BANCORP, INC.

Dated: March 4, 2026

By:

/s/ Bradley S. Adams

Bradley S. Adams

Executive Vice President, Chief Operating Officer and Chief Financial Officer

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Reference

Frequently asked questions

When did Old Second Bancorp Inc file this 8-K?
Old Second Bancorp Inc (OSBC) filed this Current Report (Form 8-K) with the SEC on March 4, 2026. The accession number assigned by EDGAR is 0000357173-26-000014.
What does an 8-K disclose?
Form 8-K is the SEC's current-report form, used to disclose material events between periodic reports (10-K / 10-Q). Triggers include CEO/CFO departures, acquisitions, bankruptcies, earnings releases, auditor changes, changes in fiscal year, and amendments to corporate governance. Each 8-K is keyed to one or more Item numbers (1.01 through 9.01).
What is the key takeaway from this filing?
Old Second Bancorp to redeem $30M of 2031 subordinated notes on April 15, 2026; 100% principal and accrued interest; Fed non-objection. This is Boardroom Alpha's one-line summary of the current report; see the full filing text above for the formal disclosure.
What Item codes does an 8-K cover?
An 8-K's Item codes (1.01 through 9.01) specify what kind of event is being disclosed — e.g. Item 1.01 for entering a material agreement, Item 5.02 for departure/election of directors and executive officers, Item 8.01 for other events. The Item codes for this 8-K appear in the filing text above.
Where can I find Old Second Bancorp Inc's prior current reports on EDGAR?
The SEC EDGAR browser lists every 8-K Old Second Bancorp Inc has filed under CIK 357173, sortable by date. Use the "View on SEC EDGAR" link in the page header, or browse directly via https://www.sec.gov/cgi-bin/browse-edgar.
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