Company: OSBC
Filing Date: 2025-05-06
Form Type: S-4/A
Source: 0001104659-25-045103
Chunk: 400

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-06
Form: S-4/A
Chunk 400
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 of the condition, and the Company then fails to remedy the condition within thirty (30) days of receiving such

<div align='center'>C-1-17</div>

TABLE OF CONTENTS

notice. The Executive’s right to terminate employment for Good Reason shall not be affected by the Executive’s incapacity due to physical or mental illness. The Executive’s continued employment shall not constitute consent to, or a waiver of rights with respect to, any circumstance constituting Good Reason herein.

#### 2.6 Definition of “Cause
.

#### ”

“

#### Cause
” shall mean the occurrence of any one or more of the following:

(a) A demonstrably willful and deliberate act or failure to act by the Executive (other than as a result of incapacity due to physical or mental illness) which is committed in bad faith, without reasonable belief that such action or inaction is in the best interests of the Company, which causes actual material financial injury to the Company, or any of its subsidiaries, and which act or inaction is not remedied within fifteen (15) business days of written notice from the Company or the subsidiary for which the Executive works; or

(b) The Executive’s conviction for committing an act of fraud, embezzlement, theft, or any other act constituting a felony involving moral turpitude which causes material harm, financial or otherwise, to the Company or any of its subsidiaries.

#### 2.7 Other Defined Terms
. The following terms shall have the meanings set forth below:

(a) “

#### Base Salary
” means, at any time, the then-regular annual rate of pay which the Executive is receiving as salary, excluding amounts: (i) designated by the Company as payment toward reimbursement of expenses; or (ii) received under incentive or other bonus plans, regardless of whether the amounts are deferred.

(b) “

#### Bonus Amount
” means the average of the annual cash bonuses paid to the Executive for the three (3) calendar years immediately preceding the year in which the Qualifying Termination occurs, including cash bonuses that are deferred pursuant to any deferral election by Executive under a tax-qualified or non-qualified retirement or deferral plan maintained by the Company, or any of its subsidiaries.

(c) “

#### Code
” means the Internal Revenue Code of 1986, as amended.

(d) “

#### Exchange Act
” means the Securities Exchange Act of 1934, as amended from time to time, or any successor act thereto.