GARY S. COLLINS - 31 Dec 2025 Form 4 Insider Report for OLD SECOND BANCORP INC (OSBC)

Role
VICE CHAIRMAN, Director
Signature
/s/ Shirley Cantrell, Attorney-in-Fact
Issuer symbol
OSBC
Transactions as of
31 Dec 2025
Net transactions value
$0
Form type
4
Filing time
05 Jan 2026, 18:20:32 UTC
Previous filing
01 Oct 2025
Next filing
24 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
COLLINS GARY S VICE CHAIRMAN, Director 37 S. RIVER ST., AURORA /s/ Shirley Cantrell, Attorney-in-Fact 05 Jan 2026 0001184766

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OSBC Old Second Bancorp, Inc. Common Stock Other $0 +40 +0.59% $0.000000 6,805 31 Dec 2025 By 401-K F1
holding OSBC Old Second Bancorp, Inc. Common Stock 46,624 31 Dec 2025 Direct
holding OSBC Old Second Bancorp, Inc. Common Stock 78,256 31 Dec 2025 IRA F2
holding OSBC Restricted Stock Units 44,946 31 Dec 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Of this total, 40 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.
F2 Included in this total are 41,000 shares in a ROTH IRA and 37,256.085 in a traditional IRA.