OLD SECOND BANCORP INC — Director's Dealing 2025

Apr 1, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2025-03-31

Reporting Person: Pilmer Donald (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-31	Old Second Bancorp, Inc. Common Stock	J	12	—	Acquired	3966	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	180	Indirect
Old Second Bancorp, Inc. Common Stock	1450	Indirect
Restricted Stock Units	38718	Direct
Old Second Bancorp, Inc. Common Stock	63135	Direct

Footnotes

F1: Of this total, 12 shares were allocated during the first quarter pursuant to the Old Second Bancorp, Inc. Employee Salary Savings Plan. Information herein was provided by the plan trustee as of 3-31-25.

F2: These shares are held in spouse's IRA for which Mr. Pilmer is listed as a beneficiary.

F3: Included in this total are 57,649 shares held in Mr. Pilmer's name in a brokerage account and 5,486 shares held in Mr. Pilmer's name outright.