Company: OSBC
Filing Date: 2025-04-18
Form Type: DEF 14A
Source: 0001558370-25-005000
Chunk: 119

Company: OLD SECOND BANCORP INC
Filing Date: 2025-04-18
Form: DEF 14A
Chunk 119
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 unless such delivery or distribution complies with all applicable laws and regulations.

No Certificates Required . To the extent that the Plan provides for the delivery of Shares, the delivery may be effected on a non-certificated basis, to the extent not prohibited by applicable law and regulations.

<div align='center'>**Article 4

CHANGE IN CONTROL**</div>

## Section 4.1
**Consequence of a Change in Control . Subject to the provisions of Section 3.4 (relating to the adjustment of shares), and except as otherwise provided in the Plan or in the respective Award Agreement, at the time of a Change in Control:

Subject to any forfeiture and expiration provisions otherwise applicable to the respective Awards, all stock options and SARs under the Plan then held by the Participant shall become fully exercisable immediately if, and all stock awards and cash incentive awards under the Plan then held by the Participant shall become fully earned and vested immediately if, (i) the Plan and the respective Award Agreements are not the obligations of the entity, whether the Company, a successor thereto or an assignee thereof, that conducts following a Change in Control substantially all of the business conducted by the Company and its Subsidiaries immediately prior to such Change in Control or (ii) the Plan and the respective Award Agreements are the obligations of the entity, whether the Company, a successor thereto or an assignee thereof, that conducts following a Change in Control substantially all of the business conducted by the Company and its Subsidiaries immediately prior to such Change in Control and the Participant incurs a Termination of Service without Cause or by the Participant for Good Reason following such Change in Control.

Notwithstanding the foregoing provisions of this Section 4.1, and except as otherwise provided in the respective Award Agreement, if the vesting of an outstanding Award is conditioned upon the achievement of performance measures, then such vesting shall be subject to the following:

If, at the time of the Change in Control, the established performance measures are less than 50% attained (as determined in the sole discretion of the Committee, taking into account performance through the latest date preceding the Change of Control as to which performance can, as a practical matter, be determined (but not later than the end of the applicable performance period), but in any event, based pro rata in accordance with time lapsed through the date of the Change in Control in the event of any period-based performance measures), then such Award shall become vested and exercisable on a fractional basis