OLD SECOND BANCORP INC — Director's Dealing 2010

Apr 9, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2010-04-09

Reporting Person: Ladowicz John (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-04-09	Old Second Bancorp Inc. Common Stock	S	404	$6.5577	Disposed	267747	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp Inc. Common Stock	21450	Indirect
Old Second Bancorp Inc. Common Stock	21450	Indirect
Old Second Bancorp Inc. Common Stock	2146	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Stock Option (right to buy)	$7.49	2019-02-17	Common stock (1500)	1500	Direct

Footnotes

F1: Does not apply.

F2: Shares sold pursuant to 10b(5)-1 trading plan.

F3: Included in this total are 350 shares in Mr. Ladowicz' name outright and 1,796 shares of restricted stock units .