Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Diedrich Robert P
   2. Issuer Name and Ticker or Trading Symbol
FIRST MIDWEST BANCORP INC [FMBI] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP, Wealth Management
(Last)
(First)
(Middle)
ONE PIERCE PLACE, SUITE 1500		 3. Date of Earliest Transaction (Month/Day/Year)
03/15/2018
(Street)

ITASCA, IL 60143		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/15/2018   F   271 (1) D $ 25.97 56,948 D  
Common Stock 03/15/2018   F   246 (2) D $ 25.97 56,702 D  
Common Stock 03/15/2018   A   3,129 (3) A $ 0 59,831 D  
Common Stock 03/15/2018   F   306 (4) D $ 25.97 59,525 (5) D  
Common Stock               7,909 (6) I By Profit Sharing Plan Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Diedrich Robert P
ONE PIERCE PLACE
SUITE 1500
ITASCA, IL 60143		       EVP, Wealth Management  

Signatures

 Andrea L. Stangl, Attorney-in-fact for Robert P. Diedrich   03/19/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) On February 20, 2013, the Issuer granted the Reporting Person a performance shares award under the Amended and Restated First Midwest Bancorp, Inc. Omnibus Stock and Incentive Plan, subject to a three year (2013-2015) performance period, as to which 2,758 performance shares were earned on March 15, 2016. The earned performance shares were scheduled to vest in three equal annual installments on the date earned and the first and second anniversary thereof. On March 15, 2018, the third installment of 919 of the originally earned performance shares vested and were paid in shares of First Midwest Bancorp, Inc. Common Stock, of which 271 shares were surrendered by the Reporting Person to satisfy tax withholding obligations. This form is being filed to reflect the surrender of such shares to satisfy the Reporting Person's tax withholding obligation.
(2) On February 19, 2014, the Issuer granted the Reporting Person a performance shares award under the Amended and Restated First Midwest Bancorp, Inc. Omnibus Stock and Incentive Plan, subject to a three year (2014-2016) performance period, as to which 2,515 performance shares were earned on March 15, 2017. The earned performance shares were scheduled to vest in three equal annual installments on the date earned and the first and second anniversary thereof. On March 15, 2018, the second installment of 838 of the originally earned performance shares vested and were paid in shares of First Midwest Bancorp, Inc. Common Stock, of which 246 shares were surrendered by the Reporting Person to satisfy tax withholding obligations. This form is being filed to reflect the surrender of such shares to satisfy the Reporting Person's tax withholding obligation.
(3) Represents performance shares earned by the Reporting Person on March 15, 2018. The performance shares were granted by the Issuer to the Reporting Person under the Amended and Restated First Midwest Bancorp, Inc. Omnibus Stock and Incentive Plan on February 18, 2015, subject to a three year (2015-2017) performance period. Of the performance shares earned, 1,043 vested immediately and were paid in shares of First Midwest Bancorp, Inc. Common Stock. The remaining 2,086 earned performance shares represent the right to receive shares of First Midwest Bancorp, Inc. Common Stock upon satisfaction of a service-based vesting requirement and are scheduled to vest in two equal annual installments on March 15, 2019 and March 15, 2020.
(4) Reflects the surrender of 306 shares of First Midwest Bancorp, Inc. Common Stock to satisfy the Reporting Person's tax withholding obligation in connection with the vesting of the first tranche of the earned performance shares described in note 3.
(5) 2,924 of these shares are restricted stock units / performance shares.
(6) Between January 17, 2018 and March 2, 2018, the Reporting Person's balance in the First Midwest Bancorp, Inc. Savings and Profit Sharing Plan was reduced by 2 shares to pay administrative fees. This information is based on a Plan statement dated March 2, 2018.

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