Form 8-K
8-K — OLD SECOND BANCORP INC
Accession: 0000357173-26-000024
Filed: 2026-05-19
Period: 2026-05-19
CIK: 0000357173
SIC: 6022 (STATE COMMERCIAL BANKS)
Item: Regulation FD Disclosure
Item: Financial Statements and Exhibits
Documents
8-K — osbc-20260519x8k.htm (Primary)
EX-99.1 (osbc-20260519xex99d1.htm)
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8-K
8-K (Primary)
Filename: osbc-20260519x8k.htm · Sequence: 1
OLD SECOND BANCORP INC_May 19, 2026
OLD SECOND BANCORP INC0000357173false00003571732026-05-192026-05-19
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): May 19, 2026
(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 7.01 Regulation FD Disclosure
On May 19, 2026, a presentation was made at the Annual Stockholders Meeting. Details of how to access the Annual Stockholders Meeting presentation materials are attached as Exhibit 99.1 to this report and such presentation announcement is incorporated herein by reference.
The information in this Form 8-K and the Exhibit attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference.
Item 9.01 Exhibits.
(d) Exhibits
99.1 – Shareholder Presentation Announcement.
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: May 19, 2026
By:
/s/ Bradley S. Adams
Bradley S. Adams
Executive Vice President,
Chief Operating Officer and
Chief Financial Officer
EX-99.1
EX-99.1
Filename: osbc-20260519xex99d1.htm · Sequence: 2
(NASDAQ:OSBC)
Exhibit 99.1
Contact:
Bradley S. Adams
For Immediate Release
Executive Vice President,
May 19, 2026
Chief Operating Officer and
Chief Financial Officer
(630) 906-5484
Old Second Bancorp, Inc. Annual Stockholders Meeting
AURORA, IL, – Old Second Bancorp, Inc. (“Old Second”) (NASDAQ: OSBC), announced the Annual Stockholders Meeting will be held on May 19, 2026 at 9:00 am CDT.
Shareholders and investors may access the presentation made at the meeting under the Presentations tab on the Investor Relations section of Old Second’s website (www.oldsecond.com).
About Old Second Bancorp, Inc.
Old Second Bancorp, Inc., is a financial services company with its main headquarters located in Aurora, Illinois. The Company is the holding company of Old Second National Bank (the “Bank”), a national banking organization headquartered in Aurora, Illinois that provides commercial and retail banking services, as well as a full complement of trust and wealth management services. The Company has offices located in Cook, DeKalb, DuPage, Kane, Kendall, LaSalle and Will counties in Illinois.
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Document and Entity Information
May 19, 2026
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