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: COLLINS GARY 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	15180	—	Acquired	67559	Direct
2025-03-04	Old Second Bancorp, Inc. Common Stock	F	4447	$17.65	Disposed	63112	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	61768.0850	Indirect
Old Second Bancorp, Inc. Common Stock	6370	Indirect
Restricted Stock Units	44946	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 8,673 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 6,507 shares.

F2: Included in this total are 46,624 shares held with a broker and 16,488 shares held outright in the reporting person's name solely.

F3: Shares withheld for taxes upon the settlement in shares of the performance-based restricted stock units previously granted to the reporting person.

F4: Included in this total are 46,624 shares held with a broker and 16,488 shares held outright in the reporting person's name solely.

F5: Included in this total are 41,000 shares in a ROTH IRA and 31,768.085 in a traditional IRA.