Old Second Bancorp, Inc.

Old Second Bancorp, Inc.

OSBCยทNASDAQ

$20.70

-3.1%
Financial ServicesBanks - Regional

Old Second Bancorp, Inc. operates as the bank holding company for Old Second National Bank that provides community banking services. It provides demand, NOW, money market, savings, time deposit, individual retirement, and checking accounts, as well as certificate of deposit accounts. The company also offers commercial loans; lease financing receivables; commercial real estate loans; construction loans; residential real estate loans, such as residential first mortgage and second mortgage loans; home equity line of credit; consumer loans, including motor vehicle, home improvement, and signature loans; installment and agricultural loans; residential mortgages; and overdraft checking. Further, it provides safe deposit services; trust and wealth management services; and money orders, cashier's checks, foreign currency, direct deposits, discount brokerage, debit and credit cards, and other services, as well as acquires the U.S. treasury notes and bonds. In addition, the company offers online and mobile banking; corporate cash management products, including remote and mobile deposits capture, investment sweep accounts, zero balance accounts, automated tax payments, automatic teller machines access, telephone banking, lockbox accounts, automated clearing house transactions, account reconciliation, controlled disbursement, detail and general information reporting, foreign and domestic wire transfers, and vault services for currency and coin; and investment, agency, and custodial services for individual, corporate, and not-for-profit clients. It operates through 63 banking centers in Cook, DeKalb, DuPage, Kane, Kendall, LaSalle, and Will counties in Illinois. Old Second Bancorp, Inc. was incorporated in 1981 and is headquartered in Aurora, Illinois.

At a Glance

Live Snapshot
Market Cap$1.06B
EPS1.6400
P/E Ratio12.62
Earnings Date07/22/2026

SEC Filings

OSBC - Filing history and reports

Filing TypeFiling DatePeriod EndingFiscal YearActions
8-K

8-K 2026

N/A

May 20, 2026
May 19, 2026
2026
8-K

8-K 2026

N/A

May 19, 2026
May 19, 2026
2026
10-Q

10-Q 2026 Q1

Q1

May 07, 2026
March 31, 2026
2026
8-K

8-K 2026

N/A

April 22, 2026
April 22, 2026
2026
8-K

8-K 2026

N/A

April 21, 2026
April 21, 2026
2026
DEF 14A

DEF 14A 2026

N/A

April 06, 2026
May 19, 2026
2026
8-K

8-K 2026

N/A

April 01, 2026
April 01, 2026
2026
8-K

8-K 2026

N/A

March 04, 2026
March 04, 2026
2026
10-K

10-K 2025 FY

FY

February 26, 2026
December 31, 2025
2025
8-K

8-K 2026

N/A

January 29, 2026
January 29, 2026
2026
Showing 1 to 10 of 572 filings

Understanding SEC Filings

Essential regulatory documents for investors

SEC filings are mandatory documents that publicly traded companies must submit to the Securities and Exchange Commission. These reports provide critical insights into a company's financial health, operations, risks, and strategic direction. For investors conducting due diligence, these filings are the most authoritative source of company information.

10-K

Annual Report

Comprehensive annual financial report filed within 60-90 days of fiscal year-end. Includes audited financial statements, management discussion & analysis (MD&A), risk factors, and detailed business operations. The most thorough financial disclosure of the year.

Filed annually
10-Q

Quarterly Report

Unaudited quarterly financial report filed within 40-45 days after each of the first three fiscal quarters. Provides updates on financial position, results of operations, and significant events. Essential for tracking quarterly performance trends.

Filed 3 times per year
8-K

Current Report

Event-driven filing for material events that shareholders should know about, filed within 4 business days. Includes acquisitions, executive changes, bankruptcy, earnings releases, and other significant developments. Critical for staying informed about breaking news.

Filed as events occur
DEF 14A

Proxy Statement

Definitive proxy statement sent to shareholders before annual meetings. Contains executive compensation details, board member information, voting matters, and corporate governance policies. Key for understanding management incentives and board composition.

Filed before shareholder meetings
S-1

Registration Statement

Initial registration for securities offerings, including IPOs. Provides detailed company history, business model, financial statements, risk factors, and use of proceeds. Essential for evaluating new investment opportunities and understanding company fundamentals.

Filed for new offerings
20-F

Foreign Annual Report

Annual report for foreign private issuers, equivalent to Form 10-K for non-U.S. companies. Filed within 4-6 months of fiscal year-end. Contains audited financials, business description, and regulatory disclosures adapted for international companies.

Foreign companies only

Why SEC Filings Matter

  • Regulatory Accuracy: Filings are subject to SEC review and legal penalties for misstatements, ensuring high data quality
  • Management Insights: MD&A sections reveal management's perspective on trends, challenges, and future outlook
  • Risk Assessment: Detailed risk factor disclosures help investors understand potential threats to business operations
  • Competitive Analysis: Business descriptions and segment data enable comparison with industry peers
  • Historical Context: Years of filings provide trend analysis and context for current performance