Old Second director plans $641,912 stock sale

Available on EDGAR 09/08/2026 - 03:22 PM EDT Accepted by SEC EDGAR 09/08/2026 - 03:21 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

OLD SECOND BANCORP INC (OSBC) director Hugh H. McLean has filed a notice under Rule 144 for a proposed sale of 25,000 shares of Old Second Bancorp common stock through UBS Financial Services Inc. The filing reports an aggregate market value of approximately $641,912.12 for these shares, with 50,875,716 shares of common stock outstanding.

Key Figures

Shares proposed for sale: 25,000 shares Aggregate market value of shares: $641,912.12 Shares outstanding: 50,875,716 shares +2 more

5 metrics

Shares proposed for sale 25,000 shares Common stock of Old Second Bancorp in Rule 144 notice for Hugh H. McLean

Aggregate market value of shares $641,912.12 Value of 25,000 Old Second Bancorp common shares covered by the notice

Shares outstanding 50,875,716 shares Old Second Bancorp common stock outstanding as referenced in the filing

Acquisition date of shares June 3, 2016 Date the common stock was acquired as Qualifying Director Owned Shares

Listing market Nasdaq Market on which the Old Second Bancorp common stock is listed

Key Terms

Rule 144, Qualifying Director Owned Shares, attorney-in-fact, Open Market Purchase

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Qualifying Director Owned Shares financial

"Qualifying Director Owned Shares Open Market Purchase"

attorney-in-fact regulatory

"for UBS Financial Services Inc, as attorney-in-fact for HUGH H. MCLEAN"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

Open Market Purchase financial

"Qualifying Director Owned Shares Open Market Purchase"

An open market purchase is when a company buys its own shares on public stock exchanges the same way any investor would, rather than through a private deal. Investors care because these purchases reduce the number of shares available, can boost earnings per share and share price, signal that management thinks the stock is undervalued, and use company cash that might otherwise go to reinvestment or dividends — like a business quietly buying back its own tickets at the box office.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction was disclosed for OSBC in this Form 144?

The filing reports that director Hugh H. McLean intends to sell 25,000 shares of Old Second Bancorp common stock under Rule 144 through UBS Financial Services Inc.

How many Old Second Bancorp (OSBC) shares are covered by this Rule 144 filing?

The notice covers a proposed sale of 25,000 shares of Old Second Bancorp common stock for the account of director Hugh H. McLean.

What is the reported market value of the OSBC shares in this Form 144?

The filing lists an aggregate market value of approximately $641,912.12 for the 25,000 shares of Old Second Bancorp common stock proposed to be sold.

How many Old Second Bancorp (OSBC) shares are outstanding according to this notice?

The Form 144 states that there are 50,875,716 shares of Old Second Bancorp common stock outstanding.

On which market are the Old Second Bancorp (OSBC) shares in this filing listed?

The shares referenced in the Form 144 are described as being listed on Nasdaq.

What is the nature of the OSBC shares being sold by Hugh H. McLean?

The securities to be sold are described as Common Stock, acquired on June 3, 2016 as Qualifying Director Owned Shares through an open market purchase for cash payment.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001184764
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Old Second Bancorp
SEC File Number	000-10537
Address of Issuer	37 South River Street Aurora ILLINOIS 60507
Phone	630-906-2303
Name of Person for Whose Account the Securities are To Be Sold	HUGH H. MCLEAN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	25000	641912.12	50875716	09/08/2026	Nasdaq

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	06/03/2016	Qualifying Director Owned Shares Open Market Purchase	Issuer			25000	06/08/2016	Cash Payment

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/08/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for HUGH H. MCLEAN
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)