James Eccher - 31 Dec 2025 Form 4 Insider Report for OLD SECOND BANCORP INC (OSBC)

Reporting relationship: CHAIRMAN AND CEO, Director
Issuer ticker: OSBC
Reported as of: 31 Dec 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Jan 2026, 18:24:24 UTC
Prior SEC filing: 01 Oct 2025
Next SEC filing: 24 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Shirley Cantrell, Attorney-in-Fact

Key filing fact

James Eccher filed Form 4 for OLD SECOND BANCORP INC (OSBC) on 05 Jan 2026.

Key facts

This page summarizes James Eccher's Form 4 filing for OLD SECOND BANCORP INC (OSBC).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 05 Jan 2026, 18:24.

Change

Previous filing in this sequence was filed on 01 Oct 2025.
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 0001314109 Primary reporting owner

Eccher James

Relationship: CHAIRMAN AND CEO, Director
Address: 37 S. RIVER ST., AURORA
Signature: /s/ Shirley Cantrell, Attorney-in-Fact
Signature date: 05 Jan 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: $0
Shares: +125
Change %: +0.38%
Price: $0.000000
Shares after: 33,018
Date: 31 Dec 2025
Ownership: By 401-K
Footnotes: F1

OSBC transaction

Old Second Bancorp, Inc. Common Stock

Other

Transaction value: $0
Shares: +24
Change %: +0.38%
Price: $0.000000
Shares after: 6,335
Date: 31 Dec 2025
Ownership: By Profit Sharing
Footnotes: F2

OSBC holding

Old Second Bancorp, Inc. Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 329,896
Date: 31 Dec 2025
Ownership: Direct
Footnotes: F3

OSBC holding

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 184,318
Date: 31 Dec 2025
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 3 footnotes

Footnote F1

Of this total, 125 shares were allocated during the fourth quarter pursuant to the Old Second Bancorp, Inc. Employee Salary and Savings Plan. Information herein was provided by the Plan Trustee as of 12-31-25.

Footnote F2

Of this total, 24 shares were allocated during the fourth quarter pursuant to the Old Second Bancorp, Inc. Employee Profit Sharing Plan & Trust. Information herein was provided by the Plan Trustee as of 12-31-25.

Footnote F3

Included in this total are 148 shares held jointly with spouse and 329,748 shares held in a brokerage account.