OLD SECOND BANCORP INC 8-K

What Happened

• Old Second Bancorp, Inc. (OSBC) filed a Form 8-K on May 19, 2026 (Item 7.01) announcing that materials for its Annual Stockholders Meeting presentation are available. The announcement and instructions for accessing the presentation are attached as Exhibit 99.1 to the filing. The Form 8-K was signed by Bradley S. Adams, Executive Vice President, Chief Operating Officer and Chief Financial Officer.

Key Details

• Filing date: May 19, 2026.
• Item reported: 7.01 (Regulation FD Disclosure); Exhibit 99.1 contains the shareholder presentation announcement.
• Corporate officer signing the filing: Bradley S. Adams (EVP, COO & CFO).
• The filing states the presentation information is not deemed “filed” for purposes of Section 18 of the Securities Exchange Act and is not incorporated by reference into Securities Act filings except by specific reference.

Why It Matters

• Investors can access the company’s Annual Stockholders Meeting presentation to review management’s updates, strategy commentary, or other disclosures presented at the meeting.
• This is a Regulation FD disclosure (informational), not a financial-results filing—no earnings, executive changes, or material financial data were reported in this 8-K.
• The legal note about the information not being “filed” means the presentation is being shared for transparency but is limited in how it can be used in future SEC filings.