Subsidiaries of the Company

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Incorporated Under Laws of

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Percent Owned by the Company

Old Second National Bank

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United States

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100% of the common stock

Old Second Capital Trust II

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State of Delaware

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100% of the common stock

Old Second Affordable Housing Fund, L.L.C.

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State of Illinois

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Owned by Old Second National Bank

Station I, LLC

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State of Illinois

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Owned by Old Second National Bank

Station II, LLC

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State of Illinois

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Owned by Old Second National Bank

Station III, LLC

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State of Illinois

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Owned by Old Second National Bank

River Street Advisors, LLC

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State of Illinois

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Owned by Old Second National Bank