Old Second Bancorp (OSBC) executive logs small 91-share stock sale

Rhea-AI Filing Summary

Old Second Bancorp Inc. director and officer Darin Patrick Campbell reported an open-market sale of 91 shares of Old Second Bancorp common stock at $20.70 per share. After this sale, he directly owned 309,589 shares and indirectly held 31,159 shares through an IRA.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Campbell Darin Patrick

(Last) (First) (Middle)

37 S. RIVER ST.

(Street)

AURORA IL 60506

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
OLD SECOND BANCORP INC [ OSBC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President, Powersports Lending

3. Date of Earliest Transaction (Month/Day/Year)
02/13/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Old Second Bancorp, Inc. Common Stock	02/13/2026		S		91	D	$20.7	309,589	D
Old second Bancorp Inc., Common Stock								31,159	I	IRA

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Shirley Cantrell, Attorney-in-Fact	02/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did OSBC executive Darin Patrick Campbell report?

Darin Patrick Campbell reported selling 91 shares of Old Second Bancorp common stock in an open-market transaction at $20.70 per share. This was disclosed as a non-derivative transaction on a Form 4 insider trading report for OLD SECOND BANCORP INC.

At what price did the OSBC insider sell Old Second Bancorp shares?

The OSBC insider sale was priced at $20.70 per share. Darin Patrick Campbell sold 91 shares of Old Second Bancorp common stock in an open-market transaction, as shown in the Form 4 filing detailing this non-derivative stock sale.

How many Old Second Bancorp shares does the OSBC insider own after the sale?

After the sale, Darin Patrick Campbell directly owned 309,589 Old Second Bancorp shares. He also indirectly held 31,159 additional shares through an IRA, according to the reported post-transaction ownership details in the Form 4 filing.

What is Darin Patrick Campbell’s role at Old Second Bancorp (OSBC)?

Darin Patrick Campbell is both a director and an officer of Old Second Bancorp, serving as President, Powersports Lending. His positions are noted in the Form 4 filing that reports his recent open-market sale of company common stock.

What types of ownership did the OSBC insider report in this Form 4?

The OSBC insider reported direct ownership of 309,589 Old Second Bancorp shares and indirect ownership of 31,159 shares. The indirect holdings are through an IRA, as specified by the “I” ownership code and nature-of-ownership description in the filing.