OLD SECOND BANCORP INC — Director's Dealing 2025

Mar 6, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2025-03-04

Reporting Person: ADAMS BRADLEY S. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-04	Old Second Bancorp, Inc. Common Stock	A	15439	—	Acquired	147831	Direct
2025-03-04	Old Second Bancorp, Inc. Common Stock	F	4523	$17.65	Disposed	143308	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	9983	Indirect
Restricted Stock Units	77444	Direct

Footnotes

F1: Shares delivered to the reporting person pursuant to vesting of performance-based restricted stock units granted under the Old Second Bancorp, Inc. 2019 Equity Incentive Plan, as Amended and Restated and vested upon achievement of performance goals for the applicable performance period. The reporting person reported an acquisition of 8,821 on Form 4 filed on February 15, 2022, which represented the number of shares that would be delivered if target performance was achieved during the performance period. Actual performance exceeded the target performance for the performance period which resulted in an additional grant of 6,618 shares.

F2: Shares withheld for taxes upon settlement in shares of the performance-based restricted stock units previously granted to the reporting person.

F3: Included in this total are 75,300 shares held with a broker and 68,008 shares held by the reporting person jointly with spouse.