Company: OSBC
Filing Date: 2025-05-08
Form Type: 424B3
Source: 0001104659-25-046065
Chunk: 385

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-08
Form: 424B3
Chunk 385
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 the definition of “trade secret” as set forth in the Illinois Trade Secrets Act, 765 ILCS 1065/1, et seq., and/or the Defend Trade Secrets Act, 18 U.S.C. §1839 (“

#### Company Trade Secrets
”). The Executive acknowledges and agrees to ask the Company for clarification about what constitutes Confidential Information if, at any time, the Executive is uncertain about whether any particular information is intended to be protected hereunder. The term Confidential Information shall not include any information which the Executive establishes by a preponderance of evidence (i) was publicly known or made generally available to the public prior to the time of disclosure to the Executive; or (ii) becomes publicly known or made generally available to the public after disclosure to the Executive through no wrongful action or inaction of the Executive.

b. At all times during the Executive’s employment or service and for a period of five (5) years thereafter, the Executive will use Confidential Information exclusively on behalf of the Company or the Bank, or their subsidiaries or affiliates and, except in the normal and proper course of employment or service, will not, directly or indirectly through another person or entity or by assisting others, disclose such information in any manner or use such information for the Executive’s benefit or on behalf of

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any other person or entity. Notwithstanding the foregoing, the Executive will not, at any time, in any manner or for any purpose other than a purpose expressly permitted by law, directly or indirectly, divulge or disclose, use, transmit, copy, create, access or retain any Company Trade Secrets.

c. The Executive will not copy, duplicate or reproduce, or allow others to copy, duplicate or reproduce, any Confidential Information for any purpose other than for use by or on behalf of the Company. The Executive will comply with all policies, procedures and practices of the Company or the Bank pertaining to Confidential Information and will take all commercially reasonable steps to protect and maintain the secrecy thereof.

d. If the Executive is requested, becomes legally compelled or is otherwise required by law to make any disclosure that is prohibited by this Section, the Executive will promptly notify the Company no later than fourteen (14) days prior to such disclosure so that the Company may seek a protective order or other appropriate remedy if the Company deems such protection or remedy necessary under the circumstances. Subject to the foregoing, the Executive may furnish only that portion of Confidential Information that the Executive is legally