OLD SECOND BANCORP INC — Director's Dealing 2016

May 28, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLD SECOND BANCORP INC (OSBC)
CIK: 0000357173
Period of Report: 2016-05-27

Reporting Person: CHEATHAM J DOUGLAS (Director, CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-27	Old Second Bancorp, Inc. Common Stock	A	48.299	$7.35	Acquired	62881.299	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	38736	Indirect
Old Second Bancorp, Inc. Common Stock	4192	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Stock Options	$27.75	2017-12-18	Common Stock (15000)	15000	Direct
Employee StockOptions	$29.20	2016-12-19	common stock (12000)	12000	Direct

Footnotes

F1: Included in this total are 27,333 shares outright, 48.299 shares are dividend equivalents in the form of restricted stock units and 35,500 shares of restricted stock units in Mr. Cheatham's name alone.

F2: These shares represent a dividend equivalent in the form of restricted stock units associated with the 2014, 2015 and 2016 grants. These shares will follow the same 3-year vesting period guidelines.