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: Pilmer Donald (EVP)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-27	Old Second Bancorp, Inc. Common Stock	A	36.054	$7.35	Acquired	33536.054	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Old Second Bancorp, Inc. Common Stock	93	Indirect

Footnotes

F1: 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.

F2: Of this total, 33,480 are restricted stock units, 36.054 shares are dividend equivalents in the form of restricted stock units and 20 shares are held by Mr. Pilmer as custodian.