OLD SECOND BANCORP INC 8-K

What Happened
Old Second Bancorp, Inc. announced its financial results for the quarter ended March 31, 2026 in a press release dated April 22, 2026 and filed those results on Form 8-K (Item 2.02). The filing also included separate loan portfolio disclosures. The report was signed by Bradley S. Adams, Executive Vice President, Chief Operating Officer and Chief Financial Officer.

Key Details

• The company filed an 8-K on April 22, 2026 reporting first-quarter 2026 results (quarter ended March 31, 2026).
• Exhibits attached: 99.1 — press release dated April 22, 2026; 99.2 — loan portfolio disclosures as of March 31, 2026; 104 — interactive XBRL cover page data.
• The filing is limited to results and portfolio disclosures (Item 2.02 and Item 9.01); no executive departures or material transactions were reported in this 8-K.

Why It Matters
This filing provides investors the company’s latest quarterly earnings information plus detailed loan portfolio data, which are key inputs for evaluating Old Second’s recent performance, credit quality and balance-sheet trends. Retail investors should review the attached press release and loan disclosures to see reported revenue, earnings metrics, asset quality measures and any commentary management provides about trends or outlook.