OLD SECOND BANCORP INC — Director's Dealing 2025

Feb 21, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2025-02-19

Reporting Person: COLLINS GARY S (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-19	Restricted Stock Units	A	11962	—	Acquired	53619	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	46624	Direct
Old Second Bancorp, Inc. Common Stock	61768.0850	Indirect
Old Second Bancorp, Inc. Common Stock	6370	Indirect
Old Second Bancorp, Inc. Common Stock	5755	Direct

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one share of common stock. The reporting person was granted 11,962 restricted stock units on the date of the grant, 5,981 of which are time-based restricted stock units that vest on the third anniversary of the grant date, and 5,981 of which are performance-based restricted stock units that may vest and convert to shares within a range from 0% to 175% 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 in 3 to 5 business days from the date of vesting.

F2: Of this total, 31,146 shares are Performance-based Restricted Stock Units and 22,473 are time-based Restricted Stock Units.

F3: Included in this total are 41,000 shares in a ROTH IRA and 20,768.085 in a traditional IRA.

F4: These shares are held in Mr. Collins' name outright.