Form 8-K
8-K — OLD SECOND BANCORP INC
Accession: 0000357173-26-000020
Filed: 2026-04-22
Period: 2026-04-22
CIK: 0000357173
SIC: 6022 (STATE COMMERCIAL BANKS)
Item: Results of Operations and Financial Condition
Item: Financial Statements and Exhibits
Documents
8-K — osbc-20260422x8k.htm (Primary)
EX-99.1 (osbc-20260422xex99d1.htm)
EX-99.2 (osbc-20260422xex99d2.htm)
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8-K
8-K (Primary)
Filename: osbc-20260422x8k.htm · Sequence: 1
OLD SECOND BANCORP INC_April 22, 2026
OLD SECOND BANCORP INC0000357173false00003571732026-04-222026-04-22
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): April 22, 2026
(Exact name of registrant as specified in its charter)
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:
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common Stock
OSBC
The Nasdaq Stock Market
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. ☐
Item 2.02 Results of Operations and Financial Condition
On April 22, 2026, Old Second Bancorp, Inc. (the “Company’s”) issued a press release announcing its financial results for the first quarter ended March 31, 2026, 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 April 22, 2026
99.2
Loan Portfolio Disclosures for Old Second Bancorp, Inc. dated March 31, 2026
104
Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document)
2
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.
OLD SECOND BANCORP, INC.
Dated: April 22, 2026
By:
/s/ Bradley S. Adams
Bradley S. Adams
Executive Vice President,
Chief Operating Officer and
Chief Financial Officer
3
EX-99.1
EX-99.1
Filename: osbc-20260422xex99d1.htm · Sequence: 2
Old Second Bancorp, Inc
(NASDAQ:OSBC)
Exhibit 99.1
Contact:
Bradley S. Adams
For Immediate Release
Chief Financial Officer
April 22, 2026
(630) 906-5484
Old Second Bancorp, Inc. Reports First Quarter 2026 Net Income of $25.6 Million,
or $0.48 per Diluted Share
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.
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.
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.”
1 Non-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.
2 All comparisons throughout this release are on a linked-quarter basis, unless otherwise noted.
Results of Operations:
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.
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.
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 doubtful) to total loans was 3.64% compared to 3.12%. The quarter-over-quarter increase is driven by an increase of $26.4 million in special mention loans, an increase of $14.7 million of nonaccrual loans driven by one large commercial relationship, partially offset by a decrease of $16.2 million in substandard accruing.
● Provision for credit losses of $9.5 million was driven by powersport charge-offs, and larger than normal charge-offs in commercial and commercial real estate; the non-powersport charge-offs were primarily isolated to two loan relationships.
Deposits experienced seasonal declines in savings as well as declines in time deposits as higher rate brokered deposits and other exception-priced time deposits assumed from Bancorp Financial, Inc. rolled off.
● Total deposits were $5.56 billion, a decrease of $31.1 million, or 0.56%.
● Cost of deposits decreased 10 basis points to 1.05%.
● Average interest-bearing deposits and non-interest bearing deposits decreased $119.2 million and $42.9 million, respectively.
Net Interest Margin continued to be strong, and declines in the cost of funds outweighed softer yields during the quarter.
● Net interest margin on a fully tax-equivalent basis improved 5 basis points.
● Loan yields declined 5 basis points on lower average balances while investment yields increased 4 basis points driven on higher yield outpacing the decline in balance.
● Cost of funds declined 8 basis points driven by lower cost of deposits, specifically a 10-basis point decline on the cost of savings accounts, an 11-basis point decline in the cost of money markets, and a 16-basis point decline in the cost of time deposits.
Noninterest Income increased $476,000, or 3.92%, in the first quarter of 2026, excluding mark to market losses on MSR and changes in BOLI cash surrender values, the change was nominal.
● Card related income declined in the period due to a reduction in debit card related fees based on seasonally lower transaction volume.
● Other income growth in the period was driven by an increase in powersport related loan servicing fees and dealer charge-back income.
Noninterest Expense decreased $2.7 million or 5.15%.
● $1.3 million decrease in salaries and employee benefits, driven by declines to salaries, officer incentive accruals, and insurance premiums, partially offset by increases in payroll taxes and 401K company match on 2025 incentive payments paid in 2026.
● $1.4 million decrease in computer and data processing due to prior quarter acquisition-related core conversion expenses.
● Efficiency ratio for the quarter was 52.40% compared to 53.98% and the adjusted efficiency ratio1 was 51.70% compared to 51.28%.
Capital continued to grow due to strong net income.
● Stockholders’ equity decreased $3.5 million partially comprised of $3.7 million of dividends declared, a $20.0 million increase in treasury stock from share repurchases, and an increase of $2.4 million in AOCI unrealized losses on securities, partially offset by net income of $25.6 million.
● Share repurchases of 1,175,859 shares at an average price paid per share of $19.63, for a total reduction to capital of $23.1 million.
● ROATCE1 was 14.20% compared to 16.15%.
● Tangible common equity to tangible assets1 was 11.07% compared to 11.02%.
2
1 Non-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.
Cautionary Note Regarding Forward-Looking Statements
This earnings release and statements by our management may contain forward-looking statements within the Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as “should,” “anticipate,” “expect,” “estimate,” “intend,” “believe,” “may,” “likely,” “will,” “forecast,” “project,” “looking forward,” “optimistic,” “hopeful,” “potential,” “progress,” “prospect,” “remain,” “deliver,” “continue,” “trend,” “momentum,” “remainder,” “beyond,” “build,” and “near” or other statements that indicate future events or expectations. Examples of forward-looking statements include, but are not limited to, statements regarding the economic outlook, balance sheet growth, and building capital. Such forward-looking statements are subject to risks, uncertainties, and other factors, which could cause actual results to differ materially from future results expressed or implied by such forward-looking statements. The following factors, among others, could cause actual results to differ materially from the anticipated results or other expectations expressed in the forward-looking statements:
● the strength of the United States economy in general and the strength of the local economies in which we conduct our operations may be different than expected;
● the rate of delinquencies and amounts of charge-offs, the level of allowance for credit loss, the rates of loan growth, or adverse changes in asset quality in our loan portfolio, which may result in increased credit risk-related losses and expenses;
● changes in legislation, regulation, policies, or administrative practices, whether by judicial, governmental, or legislative action;
● risks related to pending or future acquisitions, if any, including execution and integration risks;
● adverse conditions in the stock market, the public debt market and other capital markets (including changes in interest rate conditions) could have a negative impact on us;
● changes in interest rates, which have and may continue to affect our deposit and funding costs, net income, prepayment penalty income, mortgage banking income, and other future cash flows, or the market value of our assets, including our investment securities;
● elevated inflation which causes adverse risk to the overall economy, and could indirectly pose challenges to our clients and to our business; and
● the adverse effects of events beyond our control that may have a destabilizing effect on financial markets and the economy, such as trade disputes, epidemics and pandemics, war or terrorist activities, essential utility outages, deterioration in the global economy, instability in the credit markets, disruptions in our customers’ supply chains or disruption in transportation, and disruptions caused by widespread cybersecurity incidents.
Additional risks and uncertainties are contained in the “Risk Factors” and forward-looking statements disclosure in our most recent Annual Report on Form 10-K, and Quarterly Reports on Form 10-Q. The inclusion of this forward-looking information should not be construed as a representation by us or any person that future events, plans, or expectations contemplated by us will be achieved. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law.
Conference Call
We will host a call on Thursday, April 23, 2026, at 10:00 a.m. Eastern Time (9:00 a.m. Central Time) to discuss our first quarter 2026 financial results. Investors may listen to our earnings call via a live webcast by accessing the link provided below, or alternatively, on the Events section of the Old Second Investor Relations website (https://investors.oldsecond.com/events). Investors are encouraged to register at the webcast link at least 10 minutes prior to the scheduled start of the call.
Webcast URL: https://www.webcaster5.com/Webcast/Page/2239/53807
A replay of the webcast will be available under the Events section of the Old Second Investor Relations website (https://investors.oldsecond.com/events) for up to one year after the earnings call date.
3
Non-GAAP Presentations
Management has disclosed in this earnings release certain non-GAAP financial measures to evaluate and measure our performance, including the presentation of adjusted net income, net interest income and net interest margin on a fully tax-equivalent basis, and our efficiency ratio calculations on a tax-equivalent basis. The net interest margin on a fully tax-equivalent basis is calculated by dividing net interest income on a tax equivalent basis by average earning assets for the period. Consistent with industry practice, management has disclosed the efficiency ratio including and excluding certain items, which is discussed in the efficiency ratio presentation on page 13.
We consider the use of select non-GAAP financial measures and ratios to be useful for financial and operational decision-making and useful in evaluating period-to-period comparisons. We believe that these non-GAAP financial measures provide meaningful supplemental information regarding our performance by excluding certain expenditures or assets or by adjusting certain items that we believe are not indicative of our primary business operating results or by presenting certain metrics on a fully tax-equivalent basis. We believe these measures provide investors with information regarding balance sheet profitability, and we believe that management and investors benefit from referring to these non-GAAP financial measures in assessing our performance and when planning, forecasting, analyzing, and comparing past, present and future periods.
These non-GAAP financial measures should not be considered as a substitute for GAAP financial measures, and we strongly encourage investors to review the GAAP financial measures included in this earnings release and not to place undue reliance upon any single financial measure. In addition, because non-GAAP financial measures are not standardized, it may not be possible to compare the non-GAAP financial measures presented in this earnings release with other companies’ non-GAAP financial measures having the same or similar names. The tables beginning on page 12 provide a reconciliation of each non-GAAP financial measure to the most comparable GAAP equivalent.
4
Financial Highlights
Quarters Ended
(Dollars in thousands - unaudited)
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Balance sheet summary
Total assets
$
6,849,221
$
6,902,675
$
6,991,754
$
5,701,294
$
5,727,686
Total securities available-for-sale
1,115,443
1,090,523
1,157,480
1,177,688
1,146,721
Total loans
5,185,237
5,252,131
5,264,505
3,998,667
3,940,232
Total deposits
5,564,999
5,596,069
5,760,250
4,798,439
4,852,791
Total liabilities
5,955,924
6,005,907
6,125,069
4,982,645
5,033,195
Total equity
893,297
896,768
866,685
718,649
694,491
Total tangible assets
$
6,697,509
$
6,749,787
$
6,836,565
$
5,588,090
$
5,613,460
Total tangible equity
741,585
743,880
711,496
605,445
580,265
Income statement summary
Net interest income
$
81,144
$
83,051
$
82,775
$
64,234
$
62,904
Provision for credit losses
9,500
3,000
19,653
2,500
2,400
Noninterest income
12,630
12,154
13,109
10,898
10,201
Noninterest expense
50,210
52,935
63,163
43,419
44,505
Net income
25,585
28,787
9,871
21,822
19,830
Effective tax rate
24.89
%
26.69
%
24.46
%
25.30
%
24.31
%
Profitability ratios
Return on average assets (ROAA)
1.51
%
1.64
%
0.56
%
1.53
%
1.42
%
Return on average equity (ROAE)
11.43
12.92
4.61
12.39
11.76
Net interest margin (tax-equivalent) 1
5.14
5.09
5.05
4.85
4.88
Efficiency ratio
52.40
53.98
64.46
55.99
56.46
Return on average tangible common equity (ROATCE) 1
14.20
16.15
6.16
15.29
14.70
Tangible common equity to tangible assets (TCE/TA) 1
11.07
11.02
10.41
10.83
10.34
Per share data
Diluted earnings per share
$
0.48
$
0.54
$
0.18
$
0.48
$
0.43
Tangible book value per share
14.35
14.12
13.51
13.44
12.88
Company capital ratios 2
Common equity tier 1 capital ratio
13.13
%
12.99
%
12.44
%
13.77
%
13.47
%
Tier 1 risk-based capital ratio
13.55
13.41
12.85
14.31
14.01
Total risk-based capital ratio
15.64
15.46
15.10
16.55
16.24
Tier 1 leverage ratio
11.88
11.70
11.21
11.83
11.58
Bank capital ratios 2, 3
Common equity tier 1 capital ratio
13.80
%
13.17
%
13.14
%
14.02
%
13.64
%
Tier 1 risk-based capital ratio
13.80
13.17
13.14
14.02
13.64
Total risk-based capital ratio
14.88
14.22
14.39
14.99
14.58
Tier 1 leverage ratio
12.09
11.49
11.45
11.59
11.27
1 See the discussion entitled “Non-GAAP Presentations” above and the table on pages 12 and 14 that provide a reconciliation of this non-GAAP financial measure to the most comparable GAAP equivalent.
2 Both the Company and the Bank ratios are inclusive of a capital conservation buffer of 2.50%, and both are subject to the minimum capital adequacy guidelines of 7.00%, 8.50%, 10.50%, and 4.00% for the Common equity tier 1, Tier 1 risk-based, Total risk-based and Tier 1 leverage ratios, respectively.
3 The prompt corrective action provisions are applicable only at the Bank level, and are 6.50%, 8.00%, 10.00%, and 5.00% for the Common equity tier 1, Tier 1 risk-based, Total risk-based and Tier 1 leverage ratios, respectively.
5
Old Second Bancorp, Inc. and Subsidiaries
Consolidated Balance Sheets
(In thousands - unaudited)
Quarters Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Assets
Cash and due from banks
$
48,100
$
51,665
$
53,099
$
63,484
$
52,703
Interest earning deposits with financial institutions
67,627
72,360
63,426
78,283
203,418
Cash and cash equivalents
115,727
124,025
116,525
141,767
256,121
Securities available-for-sale, at fair value
1,115,443
1,090,523
1,157,480
1,177,688
1,146,721
Federal Home Loan Bank Chicago (“FHLBC”) and Federal Reserve Bank Chicago (“FRBC”) stock
31,350
32,025
28,282
19,087
19,441
Loans held-for-sale
4,344
3,645
1,463
3,235
4,202
Loans
5,185,237
5,252,131
5,264,505
3,998,667
3,940,232
Less: allowance for credit losses on loans
72,126
72,301
75,037
42,990
41,551
Net loans
5,113,111
5,179,830
5,189,468
3,955,677
3,898,681
Premises and equipment, net
85,634
86,645
87,714
85,702
87,466
Other real estate owned, net
632
1,427
6,416
6,486
2,878
Mortgage servicing rights, at fair value
9,579
9,459
9,549
9,680
9,938
Goodwill
129,196
129,196
130,262
93,232
93,232
Core deposit intangible ("CDI")
22,516
23,692
24,927
19,972
20,994
Bank-owned life insurance (“BOLI”)
131,563
130,481
129,057
114,399
113,249
Deferred tax assets, net
31,321
31,276
33,374
20,395
23,684
Other assets
58,805
60,451
77,237
53,974
51,079
Total assets
$
6,849,221
$
6,902,675
$
6,991,754
$
5,701,294
$
5,727,686
Liabilities
Deposits:
Noninterest bearing demand
$
1,755,548
$
1,739,117
$
1,738,028
$
1,704,083
$
1,713,711
Interest bearing:
Savings, NOW, and money market
2,795,038
2,745,540
2,763,990
2,400,235
2,434,579
Time
1,014,413
1,111,412
1,258,232
694,121
704,501
Total deposits
5,564,999
5,596,069
5,760,250
4,798,439
4,852,791
Securities sold under repurchase agreements
23,130
23,769
24,290
47,252
38,664
Other short-term borrowings
200,000
215,000
165,000
-
-
Junior subordinated debentures
25,774
25,774
25,774
25,774
25,773
Subordinated debentures
59,574
59,552
59,531
59,510
59,489
Notes payable and other borrowings
14,837
14,825
14,812
-
-
Other liabilities
67,610
70,918
75,412
51,670
56,478
Total liabilities
5,955,924
6,005,907
6,125,069
4,982,645
5,033,195
Stockholders’ Equity
Common stock
53,015
53,015
53,015
45,094
45,094
Additional paid-in capital
338,418
341,451
340,108
206,207
205,282
Retained earnings
559,129
537,231
512,131
505,419
486,300
Accumulated other comprehensive loss, net
(31,095)
(28,738)
(32,294)
(37,426)
(41,379)
Treasury stock
(26,170)
(6,191)
(6,275)
(645)
(806)
Total stockholders’ equity
893,297
896,768
866,685
718,649
694,491
Total liabilities and stockholders’ equity
$
6,849,221
$
6,902,675
$
6,991,754
$
5,701,294
$
5,727,686
6
Old Second Bancorp, Inc. and Subsidiaries
Consolidated Statements of Income
(In thousands, except share data - unaudited)
Three Months Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Interest and dividend income
Loans, including fees
$
87,138
$
90,925
$
91,301
$
61,954
$
61,595
Loans held-for-sale
43
35
31
39
22
Securities:
Taxable
8,949
9,136
9,872
9,959
9,227
Tax exempt
1,155
1,219
1,235
1,229
1,260
Dividends from FHLBC and FRBC stock
512
390
381
273
473
Interest bearing deposits with financial institutions
549
598
1,255
1,784
988
Total interest and dividend income
98,346
102,303
104,075
75,238
73,565
Interest expense
Savings, NOW, and money market deposits
7,147
7,906
9,043
5,606
4,913
Time deposits
7,217
8,665
10,896
4,508
4,829
Securities sold under repurchase agreements
50
45
60
56
68
Other short-term borrowings
1,791
1,644
308
-
17
Junior subordinated debentures
296
288
288
288
288
Subordinated debentures
546
546
547
546
546
Notes payable and other borrowings
155
158
158
-
-
Total interest expense
17,202
19,252
21,300
11,004
10,661
Net interest and dividend income
81,144
83,051
82,775
64,234
62,904
Provision for credit losses
9,500
3,000
19,653
2,500
2,400
Net interest and dividend income after provision for credit losses
71,644
80,051
63,122
61,734
60,504
Noninterest income 1
Wealth management
3,383
3,537
3,515
3,103
3,089
Service charges on deposits
3,126
3,125
3,202
3,060
2,976
Secondary mortgage fees
121
123
92
84
73
Mortgage servicing rights mark to market loss
(152)
(428)
(389)
(531)
(570)
Mortgage servicing income
497
444
469
472
480
Net gain on sales of mortgage loans
555
657
620
550
464
Securities gains (losses), net
-
8
(1)
-
-
Change in cash surrender value of BOLI
1,082
834
1,175
690
498
Death benefit realized on BOLI
-
-
430
-
-
Card related income
2,354
2,548
2,581
2,533
2,241
Other income
1,664
1,306
1,415
937
950
Total noninterest income
12,630
12,154
13,109
10,898
10,201
Noninterest expense 1
Salaries and employee benefits
29,673
30,996
39,723
26,950
26,993
Occupancy, furniture and equipment
5,371
5,092
4,937
4,477
4,548
Computer and data processing
3,375
4,798
4,002
2,692
2,348
FDIC insurance
759
720
854
642
628
Net teller & bill paying
716
701
691
670
658
General bank insurance
353
354
437
328
330
Amortization of core deposit intangible
1,176
1,235
1,251
1,022
1,037
Advertising and marketing expense
551
437
650
454
229
Card related expense
1,519
1,652
1,708
1,489
1,380
Professional fees
1,299
1,265
3,145
1,158
1,095
Consumer credit expense
1,522
1,451
1,368
15
25
Other real estate expense, net
(186)
81
128
35
1,873
Other expense
4,082
4,153
4,269
3,487
3,361
Total noninterest expense
50,210
52,935
63,163
43,419
44,505
Income before income taxes
34,064
39,270
13,068
29,213
26,200
Provision for income taxes
8,479
10,483
3,197
7,391
6,370
Net income
$
25,585
$
28,787
$
9,871
$
21,822
$
19,830
Basic earnings per share
$
0.49
$
0.55
$
0.19
$
0.49
$
0.44
Diluted earnings per share
0.48
0.54
0.18
0.48
0.43
Dividends declared per share
0.07
0.07
0.06
0.06
0.06
1 Certain items in prior periods have been reclassified to conform to the current presentation.
7
Analysis of Average Balances,
Tax Equivalent Income / Expense and Rates
(Dollars in thousands - unaudited)
Quarters Ended
March 31, 2026
December 31, 2025
March 31, 2025
Average
Income /
Rate
Average
Income /
Rate
Average
Income /
Rate
Balance
Expense
%
Balance
Expense
%
Balance
Expense
%
Assets
Interest earning deposits with financial institutions
$
67,571
$
549
3.30
$
66,430
$
598
3.57
$
97,645
$
988
4.10
Securities:
Taxable
969,194
8,949
3.74
979,060
9,136
3.70
1,026,233
9,227
3.65
Non-taxable (TE)1
146,299
1,462
4.05
150,573
1,543
4.07
155,024
1,595
4.17
Total securities (TE)1
1,115,493
10,411
3.79
1,129,633
10,679
3.75
1,181,257
10,822
3.72
FHLBC and FRBC Stock
31,540
512
6.58
30,085
390
5.14
19,441
473
9.87
Loans and loans held-for-sale1, 2
5,207,744
87,194
6.79
5,278,643
90,969
6.84
3,959,073
61,626
6.31
Total interest earning assets
6,422,348
98,666
6.23
6,504,791
102,636
6.26
5,257,416
73,909
5.70
Cash and due from banks
48,252
-
-
52,040
-
-
52,550
-
-
Allowance for credit losses on loans
(71,869)
-
-
(73,718)
-
-
(43,543)
-
-
Other noninterest earning assets
460,433
-
-
477,064
-
-
406,669
-
-
Total assets
$
6,859,164
$
6,960,177
$
5,673,092
Liabilities and Stockholders' Equity
NOW accounts
$
697,692
$
823
0.48
$
682,729
$
816
0.47
$
628,336
$
629
0.41
Money market accounts
946,075
4,148
1.78
958,672
4,561
1.89
801,178
3,393
1.72
Savings accounts
1,118,979
2,176
0.79
1,123,208
2,529
0.89
940,894
891
0.38
Time deposits
1,062,623
7,217
2.75
1,179,966
8,665
2.91
725,314
4,829
2.70
Interest bearing deposits
3,825,369
14,364
1.52
3,944,575
16,571
1.67
3,095,722
9,742
1.28
Securities sold under repurchase agreements
24,795
50
0.82
23,464
45
0.76
34,529
68
0.80
Other short-term borrowings
189,056
1,791
3.84
159,565
1,644
4.09
1,444
17
4.77
Junior subordinated debentures
25,774
296
4.66
25,774
288
4.43
25,773
288
4.53
Subordinated debentures
59,564
546
3.72
59,542
546
3.64
59,478
546
3.72
Notes payable and other borrowings
14,831
155
4.24
14,819
158
4.23
-
-
-
Total interest bearing liabilities
4,139,389
17,202
1.69
4,227,739
19,252
1.81
3,216,946
10,661
1.34
Noninterest bearing deposits
1,738,504
-
-
1,781,374
-
-
1,703,382
-
-
Other liabilities
73,284
-
-
67,078
-
-
69,186
-
-
Stockholders' equity
907,987
-
-
883,986
-
-
683,578
-
-
Total liabilities and stockholders' equity
$
6,859,164
$
6,960,177
$
5,673,092
Net interest income (GAAP)
$
81,144
$
83,051
$
62,904
Net interest margin (GAAP)
5.12
5.07
4.85
Net interest income (TE)1
$
81,464
$
83,384
$
63,248
Net interest margin (TE)1
5.14
5.09
4.88
Interest bearing liabilities to earning assets
64.45
%
64.99
%
61.19
%
1 Tax equivalent (TE) basis is calculated using a marginal tax rate of 21% in 2026 and 2025. See the discussion entitled “Non-GAAP Presentations” above and the tables beginning on page 12 that provide a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent.
2 Interest income from loans is shown on a TE basis, which is a non-GAAP financial measure as discussed in the table on page 12, and includes loan fee income of $1.9 million for the first quarter of 2026, loan fee income of $1.9 million for the fourth quarter of 2025, and loan fee income of $545,000 for the first quarter of 2025. Nonaccrual loans are included in the above stated average balances.
8
Loans and Credit Quality
Loans
Quarters Ended
(Dollars in thousands)
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Commercial
$
845,278
$
842,130
$
786,095
$
718,927
$
732,874
Leases
539,116
548,256
550,201
524,513
505,455
Commercial real estate – investor
1,169,318
1,212,384
1,257,328
1,118,782
1,105,440
Commercial real estate – owner occupied
702,986
706,567
680,412
652,449
669,964
Construction
143,563
173,630
176,387
251,692
205,839
Residential real estate – investor
69,763
70,225
69,362
50,976
50,103
Residential real estate – owner occupied
239,711
230,432
231,547
220,672
210,239
Multifamily
357,131
339,131
378,213
333,787
341,253
HELOC
235,637
235,293
234,885
111,265
104,575
Powersport
674,116
696,959
715,498
-
-
Other1
208,618
197,124
184,577
15,604
14,490
Total loans
$
5,185,237
$
5,252,131
$
5,264,505
$
3,998,667
$
3,940,232
1 The “Other” classification includes consumer loans, such as collector cars, manufactured homes, and solar loans, as well as overdrafts.
Nonperforming assets
Quarters Ended
(Dollars in thousands)
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Nonaccrual loans
$
62,636
$
47,952
$
34,126
$
31,902
$
33,394
Loans past due 90 days or more and still accruing interest
12,868
4,879
13,859
345
1,397
Total nonperforming loans
75,504
52,831
47,985
32,247
34,791
Other real estate owned
632
1,427
6,416
6,486
2,878
Repossessed assets 1
858
1,363
2,088
234
484
Total nonperforming assets
$
76,994
$
55,621
$
56,489
$
38,967
$
38,153
30-89 days past due loans and still accruing interest
$
50,036
$
52,169
$
22,415
$
14,652
$
21,951
Nonaccrual loans to total loans
1.21
%
0.91
%
0.65
%
0.80
%
0.85
%
Nonperforming loans to total loans
1.46
%
1.01
%
0.91
%
0.81
%
0.88
%
Nonperforming assets to total loans plus OREO and repossessed assets
1.48
%
1.06
%
1.07
%
0.97
%
0.97
%
Purchased credit-deteriorated loans to total loans
1.35
%
1.50
%
1.61
%
0.23
%
0.27
%
Allowance for credit losses
$
72,126
$
72,301
$
75,037
$
42,990
$
41,551
Allowance for credit losses to total loans
1.39
%
1.38
%
1.43
%
1.08
%
1.05
%
Allowance for credit losses to nonaccrual loans
115.15
%
150.78
%
219.88
%
134.76
%
124.43
%
1 Repossessed assets are reported in other assets.
9
The following table shows classified loans by segment, which include nonaccrual loans, PCD loans if the risk rating so indicates, and all other loans considered substandard, for the following periods.
Classified loans
Quarters Ended
(Dollars in thousands)
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Commercial
$
50,640
$
51,587
$
50,680
$
23,354
$
20,807
Leases
2,604
2,428
1,277
1,346
848
Commercial real estate – investor
14,959
14,245
2,853
14,752
14,299
Commercial real estate – owner occupied
60,594
64,081
72,020
51,335
26,818
Construction
12,983
11,421
1,612
1,624
18,201
Residential real estate – investor
1,012
1,142
1,228
1,201
1,283
Residential real estate – owner occupied
1,886
1,897
1,839
1,707
1,759
Multifamily
1,489
1,494
1,183
1,099
332
HELOC
1,832
1,466
1,538
1,180
686
Powersport
204
68
-
-
-
Other1
369
270
30
22
10
Total classified loans
$
148,572
$
150,099
$
134,260
$
97,620
$
85,043
1 The “Other” classification includes consumer loans, such as collector cars, manufactured homes, and solar loans, as well as overdrafts.
Loan charge–offs, net of recoveries
Quarters Ended
(Dollars in thousands)
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Commercial
$
1,298
$
(44)
$
385
$
1,093
$
3,414
Leases
197
15
848
(3)
93
Commercial real estate – Investor
3,919
(14)
(15)
(14)
(14)
Commercial real estate – Owner occupied
(5)
1,125
(2)
(1)
39
Construction
-
-
(46)
(337)
821
Residential real estate – Investor
(2)
(1)
(2)
(2)
(2)
Residential real estate – Owner occupied
(7)
(11)
(7)
(8)
(30)
Multifamily
-
-
181
-
-
HELOC
(6)
(49)
(19)
(10)
(12)
Powersport
3,894
4,466
2,980
-
-
Other 1
488
494
805
67
44
Net charge–offs / (recoveries)
$
9,776
$
5,981
$
5,108
$
785
$
4,353
1 The “Other” classification includes consumer loans, such as collector cars, manufactured homes, and solar loans, as well as overdrafts.
10
Old Second Bancorp, Inc. and Subsidiaries
Quarterly Consolidated Average Balance
(In thousands - unaudited)
Quarters Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Assets
Cash and due from banks
$
48,252
$
52,040
$
51,357
$
47,875
$
52,550
Interest earning deposits with financial institutions
67,571
66,430
119,619
166,366
97,645
Cash and cash equivalents
115,823
118,470
170,976
214,241
150,195
Securities available-for-sale, at fair value
1,115,493
1,129,633
1,165,900
1,190,123
1,181,257
Federal Home Loan Bank Chicago (“FHLBC”) and Federal Reserve Bank Chicago (“FRBC”) stock
31,540
30,085
25,961
19,200
19,441
Loans held-for-sale
2,023
3,254
1,975
2,375
1,343
Loans
5,205,721
5,275,389
5,215,374
3,958,275
3,957,730
Less: allowance for credit losses on loans
71,869
73,718
72,354
41,544
43,543
Net loans
5,133,852
5,201,671
5,143,020
3,916,731
3,914,187
Premises and equipment, net
86,260
87,449
88,304
87,081
87,709
Other real estate owned, net
853
4,410
6,464
2,099
13,388
Mortgage servicing rights, at fair value
9,383
9,490
9,632
9,856
10,211
Goodwill
129,196
130,135
127,873
93,232
93,253
Core deposit intangible ("CDI")
23,073
24,281
25,539
20,462
21,490
Bank-owned life insurance (“BOLI”)
130,930
130,151
128,870
113,326
112,848
Deferred tax assets, net
30,342
32,705
30,375
23,549
25,489
Other assets
50,396
58,443
74,364
44,431
42,281
Total assets
$
6,859,164
$
6,960,177
$
6,999,253
$
5,736,706
$
5,673,092
Liabilities
Deposits:
Noninterest bearing demand
$
1,738,504
$
1,781,374
$
1,782,193
$
1,729,287
$
1,703,382
Interest bearing:
Savings, NOW, and money market
2,762,746
2,764,609
2,798,414
2,424,947
2,370,408
Time
1,062,623
1,179,966
1,347,455
695,946
725,314
Total deposits
5,563,873
5,725,949
5,928,062
4,850,180
4,799,104
Securities sold under repurchase agreements
24,795
23,464
33,382
35,419
34,529
Other short-term borrowings
189,056
159,565
25,978
-
1,444
Junior subordinated debentures
25,774
25,774
25,774
25,773
25,773
Subordinated debentures
59,564
59,542
59,521
59,500
59,478
Notes payable and other borrowings
14,831
14,819
14,806
-
-
Other liabilities
73,284
67,078
61,732
59,580
69,186
Total liabilities
5,951,177
6,076,191
6,149,255
5,030,452
4,989,514
Stockholders’ Equity
Common stock
53,015
53,015
53,015
45,094
45,028
Additional paid-in capital
340,459
340,870
339,612
205,706
205,433
Retained earnings
551,491
526,910
500,075
497,224
479,011
Accumulated other comprehensive loss, net
(26,361)
(30,594)
(36,823)
(41,080)
(44,853)
Treasury stock
(10,617)
(6,215)
(5,881)
(690)
(1,041)
Total stockholders’ equity
907,987
883,986
849,998
706,254
683,578
Total liabilities and stockholders’ equity
$
6,859,164
$
6,960,177
$
6,999,253
$
5,736,706
$
5,673,092
Total Earning Assets
$
6,422,348
$
6,504,791
$
6,528,829
$
5,336,339
$
5,257,416
Total Interest Bearing Liabilities
4,139,389
4,227,739
4,305,330
3,241,585
3,216,946
11
Reconciliation of Non-GAAP Financial Measures
The tables below provide a reconciliation of each non-GAAP financial measure to the most comparable GAAP measure for the periods indicated. Dollar amounts below in thousands:
Net Income and Earnings Per Share - GAAP and Adjusted
Three Months Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Income before income taxes (GAAP)
$
34,064
$
39,270
$
13,068
$
29,213
$
26,200
Pre-tax income adjustments:
Provision for credit losses - Day Two
-
-
13,153
-
-
Securities (gains) losses, net
-
(8)
1
-
-
Death benefit related to BOLI
-
-
(430)
-
-
MSR losses
152
428
389
531
570
Acquisition related costs, net of (gains) losses on branch sales
349
2,296
11,508
810
454
Adjusted net income before taxes
34,565
41,986
37,689
30,554
27,224
Taxes on adjusted net income
8,604
11,208
9,326
7,730
6,619
Adjusted net income (non-GAAP)
$
25,961
$
30,778
$
28,363
$
22,824
$
20,605
Basic earnings per share (GAAP)
$
0.49
$
0.55
$
0.19
$
0.49
$
0.44
Diluted earnings per share (GAAP)
0.48
0.54
0.18
0.48
0.43
Adjusted basic earnings per share (non-GAAP)
0.49
0.59
0.54
0.50
0.46
Adjusted diluted earnings per share (non-GAAP)
0.49
0.58
0.53
0.50
0.45
Total average assets
6,859,164
6,960,177
6,999,253
5,736,706
5,673,092
Return on average assets (GAAP)
1.51
%
1.64
%
0.56
%
1.53
%
1.42
%
Adjusted return on average assets (non-GAAP)
1.53
1.75
1.61
1.60
1.47
Quarters Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Net Interest Margin
Interest income (GAAP)
$
98,346
$
102,303
$
104,075
75,238
73,565
Taxable-equivalent adjustment:
Loans
13
9
10
9
9
Securities
307
324
328
327
335
Interest income (TE)
98,666
102,636
104,413
75,574
73,909
Interest expense (GAAP)
17,202
19,252
21,300
11,004
10,661
Net interest income (TE)
$
81,464
$
83,384
$
83,113
64,570
63,248
Net interest income (GAAP)
$
81,144
$
83,051
$
82,775
64,234
62,904
Average interest earning assets
$
6,422,348
$
6,504,791
$
6,528,829
5,336,339
5,257,416
Net interest margin (GAAP)
5.12
%
5.07
%
5.03
%
4.83
%
4.85
%
Net interest margin (TE)
5.14
%
5.09
%
5.05
%
4.85
%
4.88
%
12
GAAP
Three Months Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Efficiency Ratio (GAAP)
Noninterest expense
$
50,210
$
52,935
$
63,163
$
43,419
$
44,505
Less amortization of core deposit
1,176
1,235
1,251
1,022
1,037
Less other real estate expense, net
(186)
81
128
35
1,873
Less acquisition related costs, net of losses on branch sales
N/A
N/A
N/A
N/A
N/A
Noninterest expense less adjustments
$
49,220
$
51,619
$
61,784
$
42,362
$
41,595
Net interest income
$
81,144
$
83,051
$
82,775
$
64,234
$
62,904
Taxable-equivalent adjustment:
Loans
N/A
N/A
N/A
N/A
N/A
Securities
N/A
N/A
N/A
N/A
N/A
Net interest income including adjustments
81,144
83,051
82,775
64,234
62,904
Noninterest income
12,630
12,154
13,109
10,898
10,201
Less death benefit related to BOLI
-
-
430
-
-
Less securities gains (losses)
-
8
(1)
-
-
Less MSRs mark to market (losses) gains
(152)
(428)
(389)
(531)
(570)
Taxable-equivalent adjustment:
Change in cash surrender value of BOLI
N/A
N/A
N/A
N/A
N/A
Noninterest income including adjustments
12,782
12,574
13,069
11,429
10,771
Net interest income including adjustments plus noninterest income including adjustments
$
93,926
$
95,625
$
95,844
$
75,663
$
73,675
Efficiency ratio (GAAP)
52.40
%
53.98
%
64.46
%
55.99
%
56.46
%
N/A - Not applicable.
Non-GAAP
Three Months Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Adjusted Efficiency Ratio (non-GAAP)
Noninterest expense
$
50,210
$
52,935
$
63,163
$
43,419
$
44,505
Less amortization of core deposit
1,176
1,235
1,251
1,022
1,037
Less other real estate expense, net
(186)
81
128
35
1,873
Less acquisition related costs, net of losses on branch sales
349
2,296
11,508
810
454
Noninterest expense less adjustments
$
48,871
$
49,323
$
50,276
$
41,552
$
41,141
Net interest income
$
81,144
$
83,051
$
82,775
$
64,234
$
62,904
Taxable-equivalent adjustment:
Loans
13
9
10
9
9
Securities
307
324
328
327
335
Net interest income including adjustments
81,464
83,384
83,113
64,570
63,248
Noninterest income
12,630
12,154
13,109
10,898
10,201
Less death benefit related to BOLI
-
-
430
-
-
Less securities gains (losses)
-
8
(1)
-
-
Less MSRs mark to market (losses) gains
(152)
(428)
(389)
(531)
(570)
Taxable-equivalent adjustment:
Change in cash surrender value of BOLI
288
222
312
184
132
Noninterest income including adjustments
13,070
12,796
13,381
11,613
10,903
Net interest income including adjustments plus noninterest income including adjustments
$
94,534
$
96,180
$
96,494
$
76,183
$
74,151
Adjusted efficiency ratio (non-GAAP)
51.70
%
51.28
%
52.10
%
54.54
%
55.48
%
13
Quarters Ended
March 31,
December 31,
September 30,
June 30,
March 31,
2026
2025
2025
2025
2025
Adjusted Return on Average Tangible Common Equity Ratio
Net income (GAAP)
$
25,585
$
28,787
$
9,871
$
21,822
$
19,830
Income before income taxes (GAAP)
$
34,064
$
39,270
$
13,068
$
29,213
$
26,200
Pre-tax income adjustments:
Provision for credit losses - Day Two
-
-
13,153
-
-
Securities (gains) losses, net
-
(8)
1
-
-
MSR losses
152
428
389
531
570
Merger-related costs, net of gains on branch sales
349
2,296
11,508
810
454
Death benefit realized on BOLI
-
-
(430)
-
-
Amortization of core deposit intangibles
1,176
1,235
1,251
1,022
1,037
Adjusted net income, excluding intangibles amortization, before taxes
35,741
43,221
38,940
31,576
28,261
Taxes on adjusted net income
8,896
11,538
9,632
7,989
6,871
Adjusted net income, excluding intangibles amortization (non-GAAP)
$
26,845
$
31,683
$
29,308
$
23,587
$
21,390
Total Average Common Equity
$
907,987
883,986
$
849,998
$
706,254
$
683,578
Less average goodwill and intangible assets
152,269
154,416
153,412
113,694
114,743
Average tangible common equity (non-GAAP)
$
755,718
$
729,570
$
696,586
$
592,560
$
568,835
Return on average common equity (GAAP)
11.43
%
12.92
%
4.61
%
12.39
%
11.76
%
Return on average tangible common equity (non-GAAP)
14.20
%
16.15
%
6.16
%
15.29
%
14.70
%
Adjusted return on average tangible common equity (non-GAAP)
14.41
%
17.23
%
16.69
%
15.97
%
15.25
%
14
EX-99.2
EX-99.2
Filename: osbc-20260422xex99d2.htm · Sequence: 3
1
Loan Portfolio Disclosures
AS OF MARCH 31, 2026
Exhibit 99.2
2
Portfolio Segment Outstanding Classified Allowance
Commercial (incl. Leases) $1,384 $53 1.07%
Commercial Real Estate Investor $1,169 $15 1.77%
Commercial Real Estate Owner Occ. $703 $61 0.69%
Construction $144 $13 0.83%
Residential Real Estate $309 $3 0.87%
Multifamily $357 $2 0.45%
HELOC $236 $2 1.51%
Powersport $674 - 2.52%
Other $209 - 2.27%
Total $5,185 $149 1.39%
Construction
3%
Commercial RE
Investor
22%
Commercial RE
Owner Occ.
14%
Commercial
(inc. Leases)
27%
Multifamily
7%
Residential
Real Estate
6%
HELOC
4%
Other (less than
$100 million)
4%
Powersport
13%
Loan Portfolio Composition (in millions)
Q1 2026 Loan Portfolio Disclosures
Total Loans and Allowance for Credit Losses Trend (in millions)
$3,991 $3,981 $3,940 $3,999 $5,265 $5,252 $5,185
$44 $44 $42 $43
$75 $72
$72
$-
$10
$20
$30
$40
$50
$60
$70
$80
$-
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
$7,000
9/30/2024 12/31/2024 3/31/2025 6/30/2025 9/30/2025 12/31/2025 3/31/2026
Total Loans ACL
3
Criticized Loans (in millions)
0.00%
1.00%
2.00%
3.00%
4.00%
5.00%
6.00%
7.00%
8.00%
$-
$50
$100
$150
$200
$250
$300
$350
6/30/22 9/30/22 12/31/22 3/31/23 6/30/23 9/30/23 12/31/23 3/31/24 6/30/24 9/30/24 12/31/24 3/31/25 6/30/25 9/30/25 12/31/25 3/31/26
Office CRE Healthcare Other Criticized Loans/ Total Loans
Q1 2026 Loan Portfolio Disclosures
$2,256 $1,802 $4,988 $632
$19,361
$1,076
$1,498
$6,416
$1,427
$484
$484
$234 $2,088
$1,363
$858
$(3,000)
$2,000
$7,000
$12,000
$17,000
$22,000
12/31/24 3/31/25 6/30/25 9/30/25 12/31/25 3/31/26
OREO OREO Under Contract Repossessed Assets
OREO and Repossessed Assets (in thousands)
4
Participation / Syndication Portfolio Mix (in millions)
Participation / Syndication Portfolio Exposure (in millions)
Parti / Syndi Portfolio Outstanding SNC Classified
Manufacturing C&I $72 - $8
Office CRE $37 - $3
Construction $27 - -
Multifamily $26 - -
Hotel CRE $17 - -
Other (under $15 million) $65 $7 -
Total Purchased $244 $7 $11
Manufacturing
C&I
29%
Office CRE
15%
Construction
11%
Multifamily
11%
Hotel CRE
7%
Other (under
$15 million)
27%
$495 $552 $429 $331 $244
15.4%
13.8%
10.5%
8.0%
4.5%
0.0%
5.0%
10.0%
15.0%
20.0%
25.0%
$-
$100
$200
$300
$400
$500
$600
3/31/2022 3/31/2023 3/31/2024 3/31/2025 3/31/2026
Outstanding % of Total Loans
Q1 2026 Loan Portfolio Disclosures
5
Property Type Outstanding LTV Classified Allowance
Retail $334 54% $2 1.08%
Industrial $262 46% $1 1.24%
Office $197 68% $3 3.29%
Hotel $78 46% - 1.68%
Parking Garage $64 49% - 0.95%
Senior Living $63 56% - 1.17%
Mixed Use $54 58% $8 6.12%
Gas Station/ Convenience $44 50% - 0.93%
Other (under $30 million) $73 55% $1 1.42%
Total $1,169 54% $15 1.77%
Commercial Real Estate Investor Portfolio Composition (in millions)
Retail
29%
Office
17%
Industrial
22%
Parking Garage
5%
Hotel
7%
Senior Living
5%
Mixed Use
5%
Other (under
$50 million)
10%
Illinois
56%
Wisconsin
8%
Texas
6%
North Carolina
3%
Pennsylvania
3%
Oklahoma
3%
Other (under $30
million)
21%
State Outstanding LTV Classified
Illinois $641 57% $15
Wisconsin $95 58% -
Texas $72 48% -
North Carolina $37 49% -
Oklahoma $35 62% -
Pennsylvania $33 50% -
Florida $29 40% -
Other (under $25 million) $227 48% -
Total $1,169 54% $15
Q1 2026 Loan Portfolio Disclosures
6
Location Outstanding LTV Classified Allowance
Illinois $162 72% $3 3.78%
Chicago $32 69% - 2.68%
Suburban $130 72% $3 4.04%
Oklahoma $15 64% - 1.28%
Texas $9 24% - 1.28%
Colorado $6 52% - 1.28%
Oregon $4 74% - 1.28%
Wisconsin $1 63% - 1.28%
Total $197 68% $3 3.29%
Office Commercial Real Estate Investor Portfolio Composition (in millions)
Illinois - Chicago
16%
Illinois - Suburban
66%
Oklahoma
8%
Other (less than
$5 million)
2%
Texas
5%
Colorado
3%
Office Commercial Real Estate Investor Risk Profile (in millions)
Q1 2026 Loan Portfolio Disclosures
$75
$58
$25
$39
$-
$20
$40
$60
$80
< 1 year 1-3 years 3-5 years > 5 years
Maturity Outstanding LTV DSCR
< 1 year $66 86% 1.44x
1-3 years $57 57% 1.40x
3-5 years $19 66% 1.39x
> 5 years $38 54% 1.60x
Total $180 68% 1.46x
Office Commercial Real Estate by Loan Maturity Office Commercial Real Estate > $1 million
7
Industry Outstanding Classified Allowance
Health Care, Social Services $293 $28 0.88%
Other Services $82 $5 0.46%
Retail Trade $67 - 0.21%
Manufacturing $57 $2 0.23%
Real Estate, Leasing $49 - 0.26%
Accommodation, Food Service $31 $7 1.70%
Wholesale Trade $27 $1 0.49%
Arts, Entertainment $23 $2 0.89%
Other (under $20 million) $74 $16 0.90%
Total $703 $61 0.69%
Manufacturing
8%
Accommodation,
Food Service
4%
Retail Trade
9%
Real Estate,
Leasing
7%
Healthcare
42%
Other Services
12%
Other (under $30
million)
18%
Commercial Real Estate Owner-Occupied Portfolio Composition (in millions)
Health Care, Social Outstanding Classified Allowance
Assisted Living $142 $26 1.31%
Skilled Nursing $68 - 0.21%
Memory Care $49 - 0.31%
Independent Living $17 - 0.44%
Child Care $6 - 2.07%
Other (under $5 million) $11 $2 1.26%
Total $293 $28 0.88%
Skilled
Nursing
23%
Assisted
Living
48%
Memory Care
17%
Independent
6%
Child Care
2%
Other (under $5 million)
4%
Q1 2026 Loan Portfolio Disclosures
8
Commercial & Industrial Outstanding Classified
Manufacturing $412 $14
Construction $203 $9
Administrative, Waste Service $158 $3
Professional $131 -
Transportation, Warehousing $111 $17
Real Estate, Leasing $72 -
Finance, Insurance $71 $1
Health Care, Social Services $64 -
Wholesale Trade $48 $3
Other (under $20 million) $114 $6
Total $1,384 $53
Commercial (including Leases) Portfolio Composition (in millions)
Construction
15%
Manufacturing
30%
Transportation,
Warehousing
8%
Finance, Insurance
5%
Professional
9%
Administration,
Waste Service
11%
Health Care,
Social Services
5%
Real Estate,
Leasing
5%
Other (under
$50 million)
12%
Commercial Revolving Line Utilization (outstanding in millions)
$654 $677 $653 $587 $574 $658 $717 $718
55% 56% 55%
52% 53%
55%
57% 57%
30%
35%
40%
45%
50%
55%
60%
$400
$450
$500
$550
$600
$650
$700
6/30/24 9/30/24 12/31/24 3/31/25 6/30/25 9/30/25 12/31/25 3/31/26
Q1 2026 Loan Portfolio Disclosures
9
Origination Tier Outstanding Weighted FICO Portfolio APR %
Tier 1 $351 776 7.92%
Tier 2 $132 710 10.15%
Tier 3 $81 683 12.67%
Tier 4 $40 657 14.67%
Tier 5 $70 606 17.00%
Total $674 729 10.14%
Powersport Portfolio Composition (in millions)
Tier 1
54%
Tier 2
20%
Tier 3
11%
Tier 4
6%
Tier 5
9%
Historical Contribution Margin
Q1 2026 Loan Portfolio Disclosures
Contribution Margin (1) 2021 (EBG) 2022 (EBG) 2023 (EBG) 2024 (EBG) 12/31/2025 3/31/2026
Portfolio APR 7.22% 7.42% 8.13% 9.02% 9.82% 10.14%
Net Promo Accretion 1.18% 0.69% 0.41% 0.74% 1.03% 1.30%
Participation -0.76% -0.84% -0.87% -0.87% -0.91% -1.08%
Net Loss -0.39% -0.62% -1.11% -1.39% -1.76% -2.06%
Net Contribution Margin 7.26% 6.65% 6.56% 7.52% 8.19% 8.30%
(1) Historical contribution margin represents Evergreen Bank Group (EBG) performance through 6/30/2025. Contribution margin presented after 6/30/2025 excludes purchase
accounting adjustments.
Asset Type Outstanding % of Total Portfolio APR %
New $518 77% 9.48%
Used $156 23% 12.37%
Total $674 10.14%
10
Net Charge-offs (Recoveries) (in thousands)
Portfolio 6/30/2025 (Q) 9/30/2025 (Q) 12/31/2025 (Q) 3/31/2026 (Q) 3/31/2026 (TTM) NCO(R) %
Commercial (incl. Leases) $1,090 $1,233 ($29) $1,495 $3,789 0.29%
Commercial Real Estate Investor ($14) ($15) ($14) $3,928 $3,885 0.32%
Commercial Real Estate Owner Occupied ($1) ($2) $1,125 ($14) $1,108 0.17%
Construction ($337) ($46) - - ($383) (0.20%)
Residential Real Estate ($10) ($9) ($11) ($9) ($39) (0.01%)
Multifamily - $181 - - $181 0.05%
HELOC ($10) ($19) ($49) ($6) ($84) (0.04%)
Powersport $2,980 $4,466 $3,894 $11,340 1.65%
Other $67 $805 (1) $493 (1) $488 (1) $1,853 1.28%
Total $785 $5,108 $5,981 $9,776 $21,650 0.47%
3/31/2025 6/30/2025 9/30/2025 12/31/2025 3/31/2026
Beginning ACL Balance $43,619 $41,551 $42,990 $75,037 $72,301
Day 1 Credit Mark (PCD) - - $17,540 - -
Day 2 Credit Mark (Non-PCD) - - $13,153 - -
Plus: Provision $2,285 $2,224 $6,462 $3,245 $9,602
Less: Net Charge-off (Recovery) $4,353 $785 $5,108 $5,981 $9,776
Ending ACL Balance $41,551 $42,990 $75,037 $72,301 $72,126
Allowance for Credit Losses Quarterly Rollforward(2) (in thousands)
Q1 2026 Loan Portfolio Disclosures
(2) The Allowance for Credit Losses presented excludes the Allowance for Unfunded Commitments, which totaled $2.0 million as of March 31, 2026 and is reported within other
liabilities on the Statements of Condition.
(1) $481, $332 and $420 in net charge-offs were associated with the Solar consumer portfolio acquired in Evergreen Bank Group acquisition for 9/30/2025, 12/31/2025 and
3/31/2026 respectively.
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v3.26.1
Document and Entity Information
Apr. 22, 2026
Document and Entity Information [Abstract]
Document Type
8-K
Document Period End Date
Apr. 22, 2026
Entity Registrant Name
OLD SECOND BANCORP INC
Entity Incorporation, State or Country Code
DE
Securities Act File Number
000-10537
Entity Tax Identification Number
36-3143493
Entity Address, Address Line One
37 South River Street
Entity Address, City or Town
Aurora
Entity Address, State or Province
IL
Entity Address, Postal Zip Code
60507
City Area Code
630
Local Phone Number
892-0202
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Trading Symbol
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Security Exchange Name
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Entity Emerging Growth Company
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Two-character EDGAR code representing the state or country of incorporation.
+ References
No definition available.
+ Details
Name:
dei_EntityIncorporationStateCountryCode
Namespace Prefix:
dei_
Data Type:
dei:edgarStateCountryItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityRegistrantName
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2
+ Details
Name:
dei_EntityTaxIdentificationNumber
Namespace Prefix:
dei_
Data Type:
dei:employerIdItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Local phone number for entity.
+ References
No definition available.
+ Details
Name:
dei_LocalPhoneNumber
Namespace Prefix:
dei_
Data Type:
xbrli:normalizedStringItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 13e
-Subsection 4c
+ Details
Name:
dei_PreCommencementIssuerTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
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Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14d
-Subsection 2b
+ Details
Name:
dei_PreCommencementTenderOffer
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
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X
- Definition
Title of a 12(b) registered security.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b
+ Details
Name:
dei_Security12bTitle
Namespace Prefix:
dei_
Data Type:
dei:securityTitleItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Name of the Exchange on which a security is registered.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection d1-1
+ Details
Name:
dei_SecurityExchangeName
Namespace Prefix:
dei_
Data Type:
dei:edgarExchangeCodeItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 14a
-Subsection 12
+ Details
Name:
dei_SolicitingMaterial
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Trading symbol of an instrument as listed on an exchange.
+ References
No definition available.
+ Details
Name:
dei_TradingSymbol
Namespace Prefix:
dei_
Data Type:
dei:tradingSymbolItemType
Balance Type:
na
Period Type:
duration
X
- Definition
Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
-Number 230
-Section 425
+ Details
Name:
dei_WrittenCommunications
Namespace Prefix:
dei_
Data Type:
xbrli:booleanItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
osbc_DocumentAndEntityInformationAbstract
Namespace Prefix:
osbc_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration