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BCS

Current Report · Items 2.02, 9.01 · 8-K

Old Second Bancorp, Inc.

OSBCNASDAQEQUITYCurrent

Results of Operations and Financial Condition

Item 2.02 Results of Operations and Financial Condition On October 21, 2026, Old Second Bancorp, Inc. (the “Company’s”) issued a press release announcing its financial results for the third quarter ended September 30, 2026, along with certain other financial information. Copies of the Company’s press release and loan portfolio disclosures are attached as Exhibits 99.1 and 99.2, respectively.

Filed Oct 21, 2026Accepted Oct 21, 2026, 4:05 PM EDTCIK 357173Accession 0000357173-26-000057
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Press release in this filing

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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. Other EventsOct 20, 2026
  3. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory ArrangementsOct 19, 2026
  4. SCHEDULE 13G - filed by DIMENSIONAL FUND ADVISORS LP regarding OLD SECOND BANCORP INCOct 8, 2026
  5. Other EventsOct 1, 2026

Registered securities in this filing

OLD SECOND BANCORP INC · 8-K · Filed 2026-10-21

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_10_21_2026_To_10_21_2026_P3uFXH773kaN_NdYJJTkDQ

Dimensions: Not supplied

Accession 000035717326000057 · 1 registered-security cover member

Read the exact SEC filing ↗

Disclosure sections

Items 2.02, 9.01

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

Item 2.02Item 2.02 - Results of Operations
Item 2.02 Results of Operations and Financial Condition On October 21, 2026, Old Second Bancorp, Inc. (the “Company’s”) issued a press release announcing its financial results for the third quarter ended September 30, 2026, along with certain other financial information. Copies of the Company’s press release and loan portfolio disclosures are attached as Exhibits 99.1 and 99.2, respectively.
Filed exhibits (2)
EX-99.1 (by filename) osbc-ex99d1.htm

(NASDAQ:OSBC) Exhibit 99.1 Contact: Bradley S. Adams For Immediate Release Chief Financial Officer October 21, 2026 ───────────────────────────────────────────────────────────────────────── (630) 906-5484 Old Second Bancorp, Inc. Reports Third Quarter 2026 Net Income of $28.9 Million, or $0.56 per Diluted Share AURORA, IL, October 21, 2026 - Old Second Bancorp, Inc. (the “Company,” “Old Second,” “we,” “us,” and “our”) (NASDAQ: OSBC), the parent company of Old Second National Bank (the “Bank”), today announced financial results for the third quarter of 2026. Our net income was $28.9 million, or $0.56 per diluted share, for the third quarter of 2026, compared to net income of $28.2 million, or $0.54 per diluted share, for the second quarter of 2026. Adjusted net income1 was $28.5 million, or adjusted diluted earnings per share1 of $0.55, for the third quarter of 2026, compared to adjusted net income1 of $28.7 million, or adjusted diluted earnings per share1 of $0.55, for the second quarter of 2026. Notable Items2 Net interest and dividend income was $84.0 million, reflecti…

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EX-99.2 (by filename) osbc-ex99d2.htm

1 Loan Portfolio Disclosures AS OF SEPTEMBER 30, 2026 Exhibit 99.2 2 Portfolio Segment Outstanding Classified Allowance Commercial (incl. Leases) $1,422 $15 1.05% Commercial Real Estate Investor $1,132 $13 1.64% Commercial Real Estate Owner Occ. $684 $27 0.40% Construction $154 $13 0.73% Residential Real Estate $313 $3 0.81% Multifamily $370 $1 0.41% HELOC $246 $2 1.37% Powersport $689 - 2.70% Other (less than $100 million) $228 - 2.01% Total $5,238 $74 1.23% Construction 3% Commercial RE Investor 22% Commercial RE Owner Occ. 13% Commercial (inc. Leases) 27% Multifamily 7% Residential Real Estate 6% HELOC 5% Other (less than $100 million) 4% Powersport 13% Loan Portfolio Composition (in millions) Q3 2026 Loan Portfolio Disclosures Total Loans and Allowance for Credit Losses Trend (in millions) $3,940 $3,999 $5,265 $5,252 $5,185 $5,246 $5,238 $42 $43 $75 $72 $72 $70 $64 $- $10 $20 $30 $40 $50 $60 $70 $80 $- $1,000 $2,000 $3,000 $4,000 $5,000 $6,000 $7,000 3/31/2025 6/30/2025 9/30/2025 12/31/2025 3/31/2026 6/30/2026 9/30/2026 Total Loans ACL ──────────────…

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