Bradley S. Adams - 30 Jun 2026 Form 4 Insider Report for OLD SECOND BANCORP INC (OSBC)

Reporting relationship: CFO & COO
Issuer ticker: OSBC
Reported as of: 30 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Jul 2026, 10:29:34 UTC
Prior SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Shirley Cantrell, Attorney-in-Fact

Key filing fact

Bradley S. Adams filed Form 4 for OLD SECOND BANCORP INC (OSBC) on 02 Jul 2026.

Key facts

This page summarizes Bradley S. Adams's Form 4 filing for OLD SECOND BANCORP INC (OSBC).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Jul 2026, 10:29.

Change

Previous filing in this sequence was filed on 02 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001598917 Primary reporting owner

ADAMS BRADLEY S.

Relationship: CFO & COO
Address: 37 S. RIVER ST., AURORA
Signature: /s/ Shirley Cantrell, Attorney-in-Fact
Signature date: 02 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OSBC transaction

Old Second Bancorp, Inc. Common Stock

Other

Transaction value
Shares: +34
Change %: +0.33%
Price: $0.000000^*
Shares after: 10,193
Date: 30 Jun 2026
Ownership: By 401-k Plan
Footnotes: F1

OSBC holding

Old Second Bancorp, Inc. Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 160,401
Date: 30 Jun 2026
Ownership: Direct
Footnotes: F2

OSBC holding

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 84,980
Date: 30 Jun 2026
Ownership: Direct

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Of this total, 34 shares were allocated during the second quarter pursuant to the Old Second Bancorp, Inc. Salary & Savings Plan. Information herein was provided by the Plan Trustee as of 6-30-26.

Footnote F2

Included in this total are 75,300 shares held jointly with spouse with a broker and 85,101 shares held jointly with spouse outright.