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BCS

Current Report · Items 8.01 · 8-K

Old Second Bancorp, Inc.

OSBCNASDAQEQUITYCurrent

Other Events

Item 8.01 Other Events Old Second Bancorp, Inc. (the “Company”, “we,” “us” and “our”) will release financial results for the second quarter of 2026 after the market closes on July 22, 2026. We will also host an earnings call on Thursday, July 23, 2026 at 10:00 a.m. Eastern Time (9:00 a.m. Central Time).…

Filed Jul 1, 2026Accepted Jul 1, 2026, 11:00 AM EDTCIK 357173Accession 0000357173-26-000035
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Company context

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.

Current securities

Recent company filings

  1. 10-Q filingNov 4, 2026
  2. Results of Operations and Financial ConditionOct 21, 2026
  3. Other EventsOct 20, 2026
  4. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory ArrangementsOct 19, 2026
  5. SCHEDULE 13G - filed by DIMENSIONAL FUND ADVISORS LP regarding OLD SECOND BANCORP INCOct 8, 2026

Registered securities in this filing

OLD SECOND BANCORP INC · 8-K · Filed 2026-07-01

As filed in this accession. Current/historical status below comes from the governed listing record; the cover itself remains exact to this filing.

Common Stock

Symbol
OSBC
Exchange
NASDAQ
Classification
COMMON
Status
Current
Filing context

Context: Duration_7_1_2026_To_7_1_2026_lAOhuJ8qLEKh-ni8xjm8eQ

Dimensions: Not supplied

Accession 000035717326000035 · 1 registered-security cover member

Read the exact SEC filing ↗

Disclosure sections

Items 8.01

Select an item to read the extracted section. The as-filed document remains the primary evidence.

Item 8.01Item 8.01 - Other Events
Item 8.01 Other Events Old Second Bancorp, Inc. (the “Company”, “we,” “us” and “our”) will release financial results for the second quarter of 2026 after the market closes on July 22, 2026. We will also host an earnings call on Thursday, July 23, 2026 at 10:00 a.m. Eastern Time (9:00 a.m. Central Time). Investors may listen to our earnings call via a live webcast by accessing the link provided below, or alternatively, on the Events section of the Old Second Investor Relations website (https://investors.oldsecond.com/events). Investors are encouraged to register at the webcast link at least 10 minutes prior to the scheduled start of the call. Webcast URL: https://www.webcaster5.com/Webcast/Page/2239/54212 A replay of the webcast will be available under the Events section of the Old Second Investor Relations website (https://investors.oldsecond.com/events) for up to one year after the earnings call date.

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