August 21, 2018
Shareholders and Board of Directors
First Midwest Bancorp, Inc.
We are aware of the incorporation by reference in Amendment No. 1 to the Registration Statement on Form S-4 (No. 333-226506) and related Proxy Statement/Prospectus of First Midwest Bancorp, Inc. and Northern States for the registration of shares of First Midwest Bancorp, Inc.’s common stock of our report dated May 8, 2018 relating to the unaudited condensed consolidated interim financial statements of First Midwest Bancorp, Inc. that is included in its Form 10-Q for the quarter ended March 31, 2018.
/s/ Ernst & Young LLP
Chicago, Illinois
August 21, 2018