OLD SECOND BANCORP INC — Director's Dealing 2025

Aug 5, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2025-08-04

Reporting Person: Lyons Billy J Jr. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-04	Old Second Bancorp, Inc. Common Stock	P	25	$16.61	Acquired	16946	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Restricted Stock Units	10551	Direct

Footnotes

F1: Included in this total are 8,353 shares held outright in Mr. Lyon's name and 8,593 shares held in Mr. Lyon's name in a brokerage account.