AI Earnings Predictions for Old Second Bancorp Inc. (OSBC)

EX-99.1

2 osbc-20260422xex99d1.htm

EX-99.1

Old Second Bancorp, Inc

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(NASDAQ:OSBC)

Exhibit 99.1

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Contact:

Bradley S. Adams

For Immediate Release

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Chief Financial Officer

April 22, 2026

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(630) 906-5484

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Old Second Bancorp, Inc. Reports First Quarter 2026 Net Income of $25.6 Million,

or $0.48 per Diluted Share

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AURORA, IL, April 22, 2026 – Old Second Bancorp, Inc. (the “Company,” “Old Second,” “we,” “us,” and “our”) (NASDAQ: OSBC), the parent company of Old Second National Bank (the “Bank”), today announced financial results for the first quarter of 2026. Our net income was $25.6 million, or $0.48 per diluted share, for the first quarter of 2026, compared to net income of $28.8 million, or $0.54 per diluted share, for the fourth quarter of 2025. Adjusted net income1 was $26.0 million, or adjusted diluted earnings per share1 of $0.49, for the first quarter of 2026, compared to adjusted net income1 of $30.8 million, or adjusted diluted earnings per share1 of $0.58, for the fourth quarter of 2025.

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Notable Items2 ​

●Net interest and dividend income was $81.1 million, reflecting a decrease of $1.9 million, or 2.30%.

●Net interest margin (NIM) on a fully tax-equivalent basis1 was 5.14%, an increase of 5 basis points.

●Provision for credit losses of $9.5 million compared to $3.0 million.

●Noninterest income was $12.6 million, an increase of $476,000, or 3.92%, compared to $12.2 million.

●Noninterest expense was $50.2 million, a decrease of $2.7 million, or 5.15%, compared to $52.9 million.

●Efficiency ratio improved 158 basis points to 52.40%; adjusted efficiency ratio was 51.70%1.

●Provision for income tax of $8.5 million, compared to $10.5 million with an effective tax rate of 24.89% and 26.69%, respectively.

●Return on average assets of 1.51%, compared to 1.64%.

●Return on tangible common equity (ROATCE)1 of 14.20%; adjusted ROATCE1 of 14.41%.

●On April 15, 2026, we paid down $30 million of the total $60 million subordinated debt outstanding and due in 2031.

●On April 21, 2026, our Board of Directors declared a cash dividend of $0.07 per share of common stock, payable on May 11, 2026, to stockholders of record as of May 1, 2026.

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Chairman, President and Chief Executive Officer Jim Eccher said “Old Second reported strong results in the first quarter of 2026 led by exceptional margin performance and disciplined operating efficiency. Tangible book value per share increased by 1.63% on a linked quarter basis despite the reduction to equity from our stock repurchases of $23.1 million, or 1.2 million shares, during the quarter. Nonperforming assets increased due to a few larger relationships, but we believe we are adequately reserved for any future losses with an Allowance for Credit Losses on loans (“ACL”) to total loans of 1.39% and ACL to nonperforming loans of 95.53%.  Credit deterioration in the first quarter largely resulted from one downtown Chicago office credit and one cash-flow-dependent commercial relationship.  Otherwise results remain solid with first quarter return on average assets and return on average common equity of 1.51% and 11.43%, respectively. The tax equivalent net interest margin expanded to 5.14% and the efficiency ratio was a very healthy 52.40%. This strong bottom-line performance and a well-positioned balance sheet drove an increase in the tangible common equity capital ratio to 11.07% from 11.02% for the prior linked period. We are proud of our performance from both a bottom-line perspective and in positioning ourselves to deliver better results to our stockholders over the remainder of the year.”

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1Non-GAAP financial measure that management believes is useful in evaluating the financial results of the Company – refer to the non-GAAP reconciliation contained in this release.

2All comparisons throughout this release are on a linked-quarter basis, unless otherwise noted.

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Results of Operations:

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Our net income was $25.6 million, or $0.48 per diluted share, for the first quarter of 2026, compared to net income of $28.8 million, or $0.54 per diluted share.

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Loans declined $66.9 million driven by decreases in commercial real estate, construction, and powersport.

●Total loans were $5.19 billion.

●Average loans (including loans held-for-sale) for the first quarter of 2026 totaled $5.21 billion, reflecting a decrease of $70.9 million.

●Yield on loans, including loans held for sale, declined 5 basis points.

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Credit Quality key performance metrics were impacted by a few larger credits.

●Nonperforming loans totaled $75.5 million compared to $52.8 million. The increase of $22.7 million was partially driven by $9.8 million of loans past due greater than 90 days, still accruing, which are in the process of renewal.

●Nonperforming loans to total loans was 1.46% compared to 1.01%.

●Classified loans totaled $148.6 million compared to $150.1 million.

●Criticized loans (special mention, substandard and d

OLD SECOND BANCORP INC_January 21, 2026 OLD SECOND BANCORP INC0000357173false00003571732026-01-212026-01-21 ​ I ​ United States Securities And Exchange Commission Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 21, 2026

(Exact name of registrant as specified in its charter) ​

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Delaware 000-10537 36-3143493

(State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

​ 37 South River Street Aurora, Illinois 60507 (Address of principal executive offices) (Zip code) (630) 892-0202 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐   Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐   Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: ​ ​

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Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock

OSBC

The Nasdaq Stock Market

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 under the Securities Act (17 CFR 230.405) or Rule 12b-2 under the Exchange Act (17 CFR 240.12b-2). Emerging growth company  ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐ ​ ​

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​ Item 2.02 Results of Operations and Financial Condition ​ On January 21, 2026, Old Second Bancorp, Inc. (the “Company’s”) issued a press release announcing its financial results for the fourth quarter ended December 31, 2025, along with certain other financial information. Copies of the Company’s press release and loan portfolio disclosures are attached as Exhibits 99.1 and 99.2, respectively. ​ ​ Item 9.01 Financial Statements and Exhibits ​ ​ ​ ​

Exhibit No. ​ Description

99.1 ​ Press Release of Old Second Bancorp, Inc. dated January 21, 2026

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99.2 ​ Loan Portfolio Disclosures for Old Second Bancorp, Inc. dated December 31, 2025

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104 ​ Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document)

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​ ​ Signature Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ​ ​ ​

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OLD SECOND BANCORP, INC.

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Dated: January 21, 2026 By: /s/ Bradley S. Adams

​ ​ Bradley S. Adams

​ ​ Executive Vice President,

​ ​ Chief Operating Officer and

​ ​ Chief Financial Officer

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OLD SECOND BANCORP INC_October 22, 2025 OLD SECOND BANCORP INC0000357173false00003571732025-10-222025-10-22 ​ I ​ United States Securities And Exchange Commission Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 22, 2025

(Exact name of registrant as specified in its charter) ​

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Delaware 000-10537 36-3143493

(State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

​ 37 South River Street Aurora, Illinois 60507 (Address of principal executive offices) (Zip code) (630) 892-0202 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐   Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐   Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: ​ ​

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Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock

OSBC

The Nasdaq Stock Market

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 under the Securities Act (17 CFR 230.405) or Rule 12b-2 under the Exchange Act (17 CFR 240.12b-2). Emerging growth company  ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐ ​ ​

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​ Item 2.02 Results of Operations and Financial Condition ​ On October 22, 2025, Old Second Bancorp, Inc. (the “Company’s”) issued a press release announcing its financial results for the third quarter ended September 30, 2025, along with certain other financial information. Copies of the Company’s press release and loan portfolio disclosures are attached as Exhibits 99.1 and 99.2, respectively. ​ ​ Item 9.01 Financial Statements and Exhibits ​ ​ ​ ​

Exhibit No. ​ Description

99.1 ​ Press Release of Old Second Bancorp, Inc. dated October 22, 2025

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99.2 ​ Loan Portfolio Disclosures for Old Second Bancorp, Inc. dated September 30, 2025

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104 ​ Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document)

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​ ​ Signature Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ​ ​ ​

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OLD SECOND BANCORP, INC.

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Dated: October 22, 2025 By: /s/ Bradley S. Adams

​ ​ Bradley S. Adams

​ ​ Executive Vice President,

​ ​ Chief Operating Officer and

​ ​ Chief Financial Officer

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