Old Second Bancorp Insider Report: Collins Reports Allocations and Large Disposals

Rhea-AI Filing Summary

Gary S. Collins, Vice Chairman and a director of Old Second Bancorp, Inc. (OSBC), reported several Form 4 transactions dated 09/30/2025. The filing shows an allocation of 62 shares to Mr. Collins under the companys Employee Salary and Savings Plan and multiple disposals: 46,624 shares and 44,946 restricted stock units were disposed of on the same date. After these transactions, Mr. Collins beneficially owned 6,765 shares 78,256.085 shares indirectly in IRAs, which include 41,000 shares in a Roth IRA and 37,256.085 shares in a traditional IRA.

The report was signed by an attorney-in-fact on 10/01/2025 and discloses Mr. Collins dual role as director and Vice Chairman. The filing records routine plan allocations and disposals but does not provide reasons for the disposals or any derivative transactions.

Positive

• 62 shares were allocated to the reporting person under the Employee Salary and Savings Plan, indicating ongoing participation in the company plan
• Post-transaction beneficial ownership details are disclosed, showing transparent reporting of 401(k) and IRA holdings including 41,000 Roth IRA shares

Negative

• 46,624 shares disposed of on 09/30/2025, a sizable reduction in directly reported holdings
• 44,946 restricted stock units were disposed of on 09/30/2025 without explanation in the filing

Insights

Financial Analyst

TL;DR: Routine insider allocation and sizable disposals; holdings remain concentrated in retirement accounts, indicating limited direct control changes.

The Form 4 documents a small plan allocation of 62 shares and two large disposals on 09/30/2025: 46,624 shares and 44,946 RSUs. Post-transaction beneficial ownership is dominated by indirect holdings in a 401(k) and IRAs totaling 78,256.085 shares, including 41,000 Roth IRA shares. From an investor lens, the filing is informational and routine; it shows movement of shares out of direct holdings but does not include option exercises or derivative activity. No price per disposed share is provided for the RSUs and one disposal shows $0 price for the 62-share allocation, consistent with plan allocation.

Corporate Governance Expert

TL;DR: Disclosure meets Section 16 format; transactions appear administrative

The Form 4 identifies Mr. Collins as a reporting officer and director and discloses indirect ownership through qualified plans and IRAs. The submission is signed by an attorney-in-fact, which is acceptable for timely filing mechanics. The report does not signal a change in board composition or executive role. It lacks explanatory notes about the motive for large disposals, so governance implications are limited to transparency of insider holdings.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

1. Name and Address of Reporting Person^*

COLLINS GARY S

(Last) (First) (Middle)

37 S. RIVER ST.

(Street)

AURORA IL 60302

(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)
	VICE CHAIRMAN

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

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	09/30/2025		J	V	62	A	$0	6,765(1)	I	By 401-K
Old Second Bancorp, Inc. Common Stock								46,624	D
Old Second Bancorp, Inc. Common Stock								78,256.085(2)	I	IRA
Restricted Stock Units								44,946	D

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:

1. Of this total, 62 shares were allocated during the third quarter pursuant to the Old Second Bancorp, Inc. Employee Salary and Savings Plan. Information herein was provided by the Plan Trustee as of 09-30-25.

2. Included in this total are 41,000 shares in a ROTH IRA and 37,256.085 in a traditional IRA.

	/s/ Shirley Cantrell, Attorney-in-Fact	10/01/2025
	** 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.
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FAQ

What transactions did Gary S. Collins report on Form 4 for OSBC?

The Form 4 reports a 62-share allocation under the Employee Salary and Savings Plan and disposals of 46,624 shares and 44,946 restricted stock units, all dated 09/30/2025.

How many OSBC shares does Gary S. Collins beneficially own after the reported transactions?

After the reported transactions he beneficially owned 6,765 shares indirectly via a 401(k) and 78,256.085 shares indirectly in IRAs 41,000 Roth IRA shares).

What positions does the reporting person hold at Old Second Bancorp (OSBC)?

The filing lists Gary S. Collins as a Director and Vice Chairman of Old Second Bancorp.

When were the transactions reported and who signed the filing?

The earliest transaction date is 09/30/2025 and the Form 4 was signed by an attorney-in-fact, Shirley Cantrell, on 10/01/2025.

Does the Form 4 include derivative securities or option exercises?

No. Table II for derivative securities contains no entries; the filing shows only non-derivative stock allocations and disposals.