Company: OSBC
Filing Date: 2025-05-08
Form Type: 424B3
Source: 0001104659-25-046065
Chunk: 358

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-08
Form: 424B3
Chunk 358
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 or business.

<div align='center'>A-61</div>

TABLE OF CONTENTS

“

#### Permitted Liens
” shall have the meaning as set forth in Section 4.20(a) .

“

#### Personal Data
” shall have the meaning as set forth in Section 4.15(b) .

“

#### Proceeding
” means any legal, administrative, arbitral, or other proceeding, claim, action, or governmental or regulatory investigation of any nature.

“

#### Program Agreement
” shall have the meaning as set forth in Section 4.16(a) .

“

#### Proxy Statement/Prospectus
” shall have the meaning as set forth in Section 4.4 .

“

#### Real Property
” shall have the meaning as set forth in Section 4.20(c) .

“

#### Recommendation Change
” shall have the meaning as set forth in Section 7.4(a) .

“

#### Registration Statement
” shall have the meaning as set forth in Section 4.4 .

“

#### Regulatory Agencies
” means, collectively, the SEC, NASDAQ, state securities authorities, the FINRA, the Securities Investor Protector Corporation, applicable securities, commodities and futures exchanges, and other self-regulatory organization, the Federal Reserve, the OCC, the FDIC, the IDFPR, the Bureau of Consumer Financial Protection, the IRS, the Department of Labor, the PBGC, and all other foreign, federal, state, county, local or other governmental, banking or regulatory agencies, authorities (including taxing and self-regulatory authorities), instrumentalities, commissions, boards, courts, administrative agencies, commissions or bodies.

“

#### Representative
” shall have the meaning as set forth in Section 7.13(a) .

“

#### Requisite Company Vote
” shall have the meaning as set forth in Section 4.3(a) .

“

#### Requisite Regulatory Approvals
” shall have the meaning as set forth in Section 7.1(c) .

“

#### SEC
” shall have the meaning as set forth in Section 4.4 .

“

#### Securities Act
” shall have the meaning as set forth in Section 4.7 .

“

#### Security Breach
” shall have the meaning as set forth in Section 4.15(g) .

“

#### Securities Laws
” means the Securities Act, the Exchange Act, the Investment Company Act of 1940, the Investment Advisers Act of 1940, the Trust Indenture Act of 1939, and the