OLD SECOND BANCORP INC — Director's Dealing 2010

Jan 21, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2010-01-19

Reporting Person: CHEATHAM J DOUGLAS (Director, CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-01-19	Old Second Bancorp Inc.	A	20200	—	Acquired	32592	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp Inc.	10455	Indirect
Old Second Bancorp Inc.	4157	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Stock Option (Right to Buy	$27.75	2017-12-18	Common Stock (15000)	15000	Direct
Employee Stock Option (Right to Buy	$29.20	2016-12-19	Common Stock (12000)	12000	Direct
Employee Stock Option (Right to Buy	$31.34	2015-12-21	Common Stock (12000)	12000	Direct
Employee Stock Option (Right to Buy	$32.59	2014-12-21	Common Stock (12000)	12000	Direct
Employee Stock Option (Right to Buy)	$25.08	2013-12-16	Common Stock (12000)	12000	Direct
Employee Stock Option (Right to Buy)	$18.81	2012-12-17	Common Stock (12000)	12000	Direct
Employee Stock Option (Right to Buy	$14.74	2011-12-19	Common Stock (10666)	10666	Direct
Employee Stock Option (Right to Buy	$8.91	2010-12-18	Common Stock (6666)	6666	Direct

Footnotes

F1: Does not apply.

F2: Represents restricted stock shares granted under the Old Second Bancorp Inc. Equity Incentive Plan. Such shares vest in 2013.

F3: Included in this total are 31,192 shares of restricted stock and 1,400 shares in Mr. Cheatham's name only.

F4: Shares restated for a 2 for 1 stock split effected in the form of a stock dividend and payable 7-28-04.

F5: Shares restated for a 4 for 3 stock split effected in the form of a stock dividend and payable 6-24-02 and restated for a 2 for 1 stock split effected in the form of a stock dividend and payable 7-28-04.