OLD SECOND BANCORP INC — Director's Dealing 2025

Mar 25, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2025-03-11

Reporting Person: Gartelmann Richard A JR (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-11	Restricted Stock Units	A	2724	—	Acquired	20552	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	26874	Direct
Old Second Bancorp, Inc. Common Stock	12177	Indirect

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one share of common stock. The reporting person was granted 2,724 restricted stock units on the date of grant, 1,362 of which are time-based restricted stock units that vest on the third anniversary of the grant date and 1,362 of which are performance-based restricted stock units that may vest and convert to shares within a range from 0% to 150% of the underlying performance-based restricted stock units originally awarded, depending on our compensation committee approved performance metrics. Vested shares, if any, will be delivered to the reporting person within 3 to 5 business days from the date of vesting.

F2: These shares are held at a broker in Mr. Gartelmann's name alone.