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Old Second Bancorp, Inc.

37 South River Street
Aurora, IL 60506-4173
(630) 892-0202

Investor Relations Contact

Shirley Cantrell
(630) 906-2303
scantrell@oldsecond.com

Transfer Agent

Old Second Bancorp, Inc.
Attn: Shirley Cantrell
Shareholder Relations Manager
37 South River Street
Aurora, IL 60506-4173
(630) 906-2303
scantrell@oldsecond.com