ADAMS BRADLEY S. 4

What Happened
Bradley S. Adams, Chief Financial Officer and Chief Operating Officer of Old Second Bancorp, was allocated 34 shares on 2026-06-30 under the Old Second Bancorp, Inc. Salary & Savings Plan. The shares were reported at $0.00 per share (total $0) and are recorded as an "other acquisition" (code J) on the Form 4.

Key Details

• Transaction date: 2026-06-30; reported on Form 4 filed 2026-07-02. No late filing flag is indicated.
• Transaction type/code: Other acquisition (J) — allocation under the company Salary & Savings Plan.
• Shares transacted: 34 shares allocated at $0.00 (total value reported $0).
• Holdings noted in filing: footnote indicates 75,300 shares held jointly with spouse via a broker and 85,101 shares held jointly with spouse outright; the 34-share allocation was provided by the Plan Trustee as of 6-30-26.
• Footnotes: F1 confirms the allocation came from the company Salary & Savings Plan; F2 details joint holdings included in the reported total.

Context
This was a routine retirement-plan allocation, not an open-market purchase or sale. Allocations under employer savings plans are common and generally reflect payroll or plan credits rather than a direct market signal about the insider's view of the stock.