Old Second director plans $615K stock sale

A director of OLD SECOND BANCORP INC has filed a Rule 144 notice to sell up to 24,000 OSBC shares relative to 50.9 million shares outstanding.

Rhea-AI Filing Summary

OLD SECOND BANCORP INC (OSBC) director Darin Patrick Campbell has filed a notice under Rule 144 indicating an intention to sell up to 24,000 shares of common stock through Charles Schwab. The planned sale has an aggregate market value of $615,360, based on recent prices, and is targeted for September 2, 2026 on Nasdaq.

The filing states that Campbell acquired 309,680 common shares on July 1, 2025 via a corporate action from the issuer in connection with a company acquisition. Shares of OLD SECOND BANCORP INC outstanding are listed as 50,875,716, providing context for the size of the planned sale.

Key Figures

Shares planned for sale: 24,000 shares Aggregate market value of planned sale: $615,360 Shares outstanding: 50,875,716 shares +2 more

5 metrics

Shares planned for sale 24,000 shares Maximum number of OLD SECOND BANCORP INC common shares covered by the Rule 144 notice

Aggregate market value of planned sale $615,360 Value of 24,000 shares of OLD SECOND BANCORP INC common stock in the Rule 144 filing

Shares outstanding 50,875,716 shares OLD SECOND BANCORP INC common shares outstanding as cited for Rule 144 context

Shares acquired via corporate action 309,680 shares Common shares acquired on July 1, 2025 via a corporate action in a company acquisition

Approximate sale date September 2, 2026 Planned date for sale of up to 24,000 OLD SECOND BANCORP INC shares under Rule 144

Key Terms

Rule 144, corporate action, aggregate market value, company acquisition

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.

corporate action financial

"Common | 07/01/2025 | Corporate Action | Issuer"

aggregate market value financial

"Common | Charles Schwab Corp. Inc. ... | 24000 | 615360.00"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

company acquisition financial

"| 309680 | 07/01/2025 | Company acquisition"

FAQ

What does the Form 144 filing disclose for OLD SECOND BANCORP INC (OSBC)?

It discloses that director Darin Patrick Campbell intends to sell up to 24,000 shares of OLD SECOND BANCORP INC common stock under Rule 144, with an indicated aggregate market value of $615,360, through Charles Schwab on Nasdaq.

How many OLD SECOND BANCORP INC (OSBC) shares are planned for sale and what is their value?

The notice covers up to 24,000 common shares of OLD SECOND BANCORP INC, with an indicated aggregate market value of $615,360. This value is based on recent market prices used in the Form 144 disclosure.

When is the planned Rule 144 sale for OSBC shares expected to occur?

The Form 144 states an approximate sale date of September 2, 2026 for the planned disposition of up to 24,000 OLD SECOND BANCORP INC common shares on Nasdaq through Charles Schwab.

How many OLD SECOND BANCORP INC (OSBC) shares did the director acquire and how?

The filing reports that Darin Patrick Campbell acquired 309,680 common shares of OLD SECOND BANCORP INC on July 1, 2025 via a corporate action from the issuer in connection with a company acquisition.

What is the total number of OLD SECOND BANCORP INC (OSBC) shares outstanding cited in the filing?

The Form 144 lists 50,875,716 shares of OLD SECOND BANCORP INC common stock as outstanding, providing context for the size of the planned 24,000-share sale under Rule 144.

Who is the broker handling the planned OSBC share sale under Rule 144?

The planned sale of up to 24,000 OLD SECOND BANCORP INC common shares is to be executed through Charles Schwab Corp. Inc., with trading expected on Nasdaq according to the Form 144 notice.

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

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Available on EDGAR 09/02/2026 - 04:01 PM Accepted by SEC EDGAR 09/02/2026 - 04:00 PM Learn about SEC filing dates

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	0002074132
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 INC
SEC File Number	000-10537
Address of Issuer	37 S RIVER ST AURORA ILLINOIS 60507
Phone	6308920202
Name of Person for Whose Account the Securities are To Be Sold	Campbell Darin Patrick
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	Charles Schwab Corp. Inc. 3000 Schwab Way Westlake TX 76262	24000	615360.00	50875716	09/02/2026	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	07/01/2025	Corporate Action	Issuer			309680	07/01/2025	Company acquisition

* 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	09/02/2026
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	Darin Patrick Campbell
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)