Old Second Bancorp, Inc. (OSBC) will release its financial results for the first quarter of 2026 after the market closes on April 22, 2026. The company will host an earnings call on Thursday, April 23, 2026, at 10:00 a.m. Eastern Time (9:00 a.m. Central Time). Investors can access the earnings call via a live webcast link provided or through the Events section of the Old Second Investor Relations website. A replay of the webcast will be available on the Investor Relations website for up to one year after the earnings call date.