James Eccher - 17 Feb 2026 Form 4 Insider Report for OLD SECOND BANCORP INC (OSBC)

Reporting relationship: CHAIRMAN AND CEO, Director
Issuer ticker: OSBC
Reported as of: 17 Feb 2026
Net transaction value: -$154,584
SEC form: 4
Accepted by SEC: 24 Feb 2026, 18:56:04 UTC
Prior SEC filing: 05 Jan 2026
Next SEC filing: 04 Mar 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 24 Feb 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: 24 Feb 2026, 18:56.

Change

Previous filing in this sequence was filed on 05 Jan 2026.
Current net transaction value: -$154,584.

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: 24 Feb 2026

Reported non-derivative transactions

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

OSBC transaction

Restricted Stock Units

Award

Transaction value: $0
Shares: +54,010
Change %: +29%
Price: $0.000000
Shares after: 238,328
Date: 17 Feb 2026
Ownership: Direct
Footnotes: F1

OSBC transaction

Restricted Stock Units

Tax liability

Transaction value: $154,584
Shares: -7,515
Change %: -3.4%
Price: $20.57
Shares after: 213,290
Date: 21 Feb 2026
Ownership: Direct
Footnotes: F2

OSBC holding

Old Second Bancorp, Inc. Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 347,419
Date: 17 Feb 2026
Ownership: Direct
Footnotes: F3

OSBC holding

Old Second Bancorp, Inc. Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 33,018
Date: 17 Feb 2026
Ownership: By 401-K

OSBC holding

Old Second Bancorp, Inc. Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 6,335
Date: 17 Feb 2026
Ownership: By Profit Sharing

^* 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

Each restricted stock unit represents a contingent right to receive one share of common stock. The reporting person was granted 54,010 restricted stock units on the date of the grant, 27,005 of which are time-based restricted stock units that vest on the third anniversary of the grant date, and 27,005 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.

Footnote F2

Represents shares withheld by the issuer to satisfy applicable tax withholding obligations in connection with the vesting of 25,038 previously reported time-based restricted stock units, the remaining shares of which were issued and added to the reporting person's common stock holdings.

Footnote F3

Included in this total are 148 shares held jointly with spouse, 17,523 shares held outright in Mr. Eccher's name and 329,748 shares held in a brokerage account.