🧾 What This Document Is

This is a Form 8-K, which is like a "current report" companies must file with the SEC to announce major events to the public. Think of it as an official news bulletin. This specific filing isn't about a surprise event or financial result; it's a scheduled announcement telling everyone when the company's official first-quarter report will be released and how to listen in.

👉 Why it matters: It sets the calendar for investors. This is the formal notice that kicks off the earnings season for this company, ensuring everyone gets the details at the same time.

🏢 What The Company Does

Old Second Bancorp, Inc. (OSBC) is a bank holding company. In simple terms, it's the parent company that owns and operates Old Second National Bank.

👉 They operate as a community bank, primarily serving customers in the Chicago, Illinois area, offering typical banking services like checking accounts, loans, and mortgages.

📅 Key Dates & Earnings Release

This is the core information in the filing. Old Second Bancorp has scheduled its big financial update.

• Earnings Release: They will publish their financial results for Q1 2026 after the market closes on April 22, 2026. This means the detailed numbers will be public in the evening.
• Earnings Call: Management will host a live conference call for investors the next morning, Thursday, April 23, 2026, at 10:00 a.m. Eastern Time (9:00 a.m. Central Time). This is where they explain the numbers and take questions.

🎧 How To Listen & Participate

The filing provides clear instructions for investors who want to tune in.

• Live Webcast: You can listen live via the internet. The direct link is: https://www.webcaster5.com/Webcast/Page/2239/53807
• Alternative Access: You can also find the webcast link on the investor relations website in the "Events" section: https://investors.oldsecond.com/events
• Pro Tip: The company suggests you register at the webcast link at least 10 minutes before the call starts to ensure you can connect smoothly.
• Replay Available: If you miss the live call, a recording will be available on the same investor relations site for a full year.

🔮 What This Signals

An earnings call announcement is a routine but important signal. 👍 Strength: It shows the company is following its planned reporting schedule. It signals transparency and provides a clear forum for management to communicate its strategy and results. ⚠️ What to Watch: The call itself will be the main event. Investors will listen for commentary on loan growth, interest rates, the health of their loan portfolio, and their outlook for the rest of 2026.

🏛️ Who Signed Off

This report was officially submitted for the company by a key executive.

• Signed by: Bradley S. Adams
• His Titles: Executive Vice President, Chief Operating Officer, and Chief Financial Officer (CFO). 👉 Having the CFO sign it makes sense, as earnings releases are fundamentally a financial reporting event.

🧠 The Analogy

This 8-K filing is like a "Save the Date" invitation for the bank's biggest quarterly performance review. It doesn't tell you how they did, but it gives you the exact date and time to show up and hear the full story directly from the people in charge.

📇 Key Contacts & People

• Bradley S. Adams - Executive Vice President, Chief Operating Officer and Chief Financial Officer (Signed the filing).
• Company Address: 37 South River Street, Aurora, Illinois 60507
• Company Phone: (630) 892-0202
• Investor Relations Website: https://investors.oldsecond.com/events

🧩 Final Takeaway

Old Second Bancorp has officially scheduled its first-quarter 2026 earnings release for April 22 after market close and its investor call for the morning of April 23. This is a routine procedural filing that simply gets the important dates on the official record for all shareholders.