December 31, 2025

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Units/

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Current

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Identity of Issuer/Description

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Shares

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Value

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Money Market Account

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Schwab Retirement Value Advantage Money Fund*

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402

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$

402

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Common/Collective Trust Funds

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The Old Second National Bank of Aurora Common Trust Fund for Corporate Retirement Plans

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Diversified Equity Portfolio*

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61,982

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12,269,037

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Bond Fund*

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28,214

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6,225,407

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Strategic Dividend Fund*

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157,261

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​

5,531,072

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Balanced Fund*

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267,292

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​

10,702,191

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​

​

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Common/Collective Trust Fund, Stable Value

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​

​

​

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Federated Capital Preservation Trust Fund

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567,316

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​

5,673,161

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Registered Investment Companies

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American Century Mid Cap Value CL R6

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16,545

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244,865

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American Funds New World R6

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14,501

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1,351,084

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Dodge & Cox Stock Fund

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402,971

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6,685,290

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Federated Ultra Short DB FD Inst SH

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83,411

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777,387

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Fidelity Mid Cap Index

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63,919

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​

2,360,517

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JPMorgan Small Cap Growth Fund R6

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30,329

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681,785

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MFS Intl Growth CL R6

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4,605

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218,633

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Metropolitan West Total Return BD PL

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368,819

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3,171,842

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Neuberger Berman Mid Cap Growth Inst

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245,867

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3,604,410

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Schwab Small Cap Index*

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72,247

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2,876,872

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T. Rowe Price Intl Value Eqty FD 1

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13,552

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318,876

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T. Rowe Price All-Cap Opportunities

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116,021

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9,161,002

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T. Rowe Price Retirement 2020 I

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24,268

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478,072

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T. Rowe Price Retirement 2030 I

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116,344

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3,223,884

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T. Rowe Price Retirement 2040 I

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116,289

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3,998,018

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T. Rowe Price Retirement 2050 I

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142,935

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3,091,677

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T. Rowe Price Retirement 2060 I

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81,078

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1,540,488

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Vanguard 500 Index Fund

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22,486

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14,207,770

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Vanguard Developed Markets Index

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299,962

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6,020,229

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Vanguard Small Cap Value Index Admi

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6,399

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582,442

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Company Stock

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Old Second Bancorp, Inc. common stock*

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645,509

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12,587,426

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Notes receivable from participants*, interest rates of 3.25% to 10.50%

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​

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2,149,602

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Total

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$

119,733,441

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*Represents a party-in-interest to the Plan.

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Cost information is not applicable as the Plan is participant directed.

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