Sec Form 4 Filing - BOUMAN ROSE MARIE @ MB FINANCIAL INC /MD - 2018-03-07

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 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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1. Name and Address of Reporting Person BOUMAN ROSE MARIE 2. Issuer Name and Ticker or Trading Symbol MB FINANCIAL INC /MD [ MBFI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) Exec Officer of Subsidiary (Last) (First) (Middle) C/O MB FINANCIAL, INC., 6111 NORTH RIVER ROAD 3. Date of Earliest Transaction (MM/DD/YY) 03/07/2018 (Street) ROSEMONT, IL60018 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 76,089 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Performance Share Units $ 0 03/07/2018 M 3,815 ( 1 ) ( 2 ) ( 2 ) Common Stock 3,815 $ 0 0 D Stock Option (Right to Buy) $ 29 06/25/2012( 3 ) 06/25/2018 Common Stock 14,430 14,430 D Stock Option (Right to Buy) $ 24.65 06/25/2012( 3 ) 06/25/2018 Common Stock 17,675 17,675 D Stock Option (Right to Buy) $ 20.4 08/29/2013( 4 ) 08/29/2022 Common Stock 4,976 4,976 D Stock Option (Right to Buy) $ 27.09 08/28/2014( 4 ) 08/28/2023 Common Stock 3,974 3,974 D Stock Option (Right to Buy) $ 29.8 02/26/2015( 4 ) 02/26/2024( 4 ) Common Stock 3,925 3,925 D Stock Option (Right to Buy) $ 31.26 02/25/2016( 5 ) 02/25/2025( 5 ) Common Stock 2,937 2,937 D Restricted Stock Units $ 0 ( 6 ) ( 6 ) Common Stock 763 763 D Stock Option (Right to Buy) $ 30.33 02/24/2017( 7 ) 02/24/2026( 7 ) Common Stock 3,625 3,625 D Performance Share Units $ 0 ( 2 ) ( 2 ) Common Stock 4,130 4,130 D Restricted Stock Units $ 0 ( 8 ) ( 8 ) Common Stock 1,652 1,652 D Stock Option (Right to Buy) $ 45.67 ( 9 ) ( 9 ) Common Stock 2,969 2,969 D Performance Share Units $ 0 ( 2 ) ( 2 ) Common Stock 3,101 3,101 D Restricted Stock Units $ 0 ( 10 ) ( 10 ) Common Stock 580 580 D Restricted Stock Units $ 0 ( 11 ) ( 11 ) Common Stock 1,860 1,860 D Stock Option (Right to Buy) $ 41.01 ( 12 ) ( 12 ) Common Stock 3,237 3,237 D Performance Share Units $ 0 ( 2 ) ( 2 ) Common Stock 3,804 3,804 D Restricted Stock Units $ 0 ( 13 ) ( 13 ) Common Stock 1,085 1,085 D Restricted Stock Units $ 0 ( 14 ) ( 14 ) Common Stock 3,043 3,043 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BOUMAN ROSE MARIE C/O MB FINANCIAL, INC. 6111 NORTH RIVER ROAD ROSEMONT, IL60018 Exec Officer of Subsidiary Signatures /s/ Doria L. Koros, attorney-in-fact for Ms. Bouman 03/09/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Transaction represents the settlement of performance share units ("PSUs"). These PSUs represented the right to receive a number of shares of the issuer's common stock, ranging from 25% to 175% of a target number of 3,815 shares (which was the number of PSUs previously reported as having been awarded to the reporting person) depending on the level of achievement relative to a specified performance goal (total shareholder return relative to a comparison group) during the performance period. Based on the actual level of achievement during the performance period, which was below the minimum level of achievement, the reporting person did not earn any of the PSUs and was not issued any shares upon settlement of the PSUs. ( 2 )Performance based vesting ( 3 )Option to purchase shares of common stock under Issuer's Amended and Restated Omnibus Incentive Plan. The option is 100% vested. ( 4 )Option to purchase shares of common stock granted to the reporting person under Issuer's Amended and Restated Omnibus Incentive Plan. The option vests annually over 4 years (25% per year) beginning on the date indicated. ( 5 )Option to purchase shares of common stock granted to the reporting person under Issuer's Omnibus Incentive Plan. The option vests annually over 4 years (25% per year beginning on February 25, 2016). ( 6 )Restricted stock units granted to the reporting person under the Issuer's Amended and Restated Omnibus Incentive Plan equal to the same amount of shares of common stock. The restricted stock units vest annually over 4 years (25% per year beginning on February 25, 2016). ( 7 )Option to purchase shares of common stock granted to reporting person under Issuer's Amended and Restated Omnibus Incentive Plan. The option vests annually over 4 years (25% per year beginning February 24, 2017). ( 8 )Restricted Stock Units granted to the reporting person under the Issuer's Amended and Restated Omnibus Incentive Plan equal to the same amount of shares of common stock. The restricted stock units vest annually over 4 years (25% per year beginning February 24, 2017). ( 9 )Option to purchase shares of common stock granted to reporting person under Issuer's Amended and Restated Omnibus Incentive Plan. The option vests annually over 4 years (25% per year beginning February 22, 2018). ( 10 )Restricted Stock Units granted to the reporting person under the Issuer's Amended and Restated Omnibus Incentive Plan. One-half of the restricted stock units are scheduled to vest on February 22, 2018 and one-half of the restricted stock units are scheduled to vest on February 22, 2019. ( 11 )Restricted Stock Units granted to the reporting person under the Issuer's Amended and Restated Omnibus Incentive Plan equal to the same amount of shares of common stock. The restricted stock units vest annually over 4 years (25% per year beginning February 22, 2018). ( 12 )Option to purchase shares of common stock granted to reporting person under Issuer's Amended and Restated Omnibus Incentive Plan. The option vests annually over 4 years (25% per year beginning February 28, 2019). ( 13 )Restricted Stock Units granted to the reporting person under the Issuer's Amended and Restated Omnibus Incentive Plan. One-half of the restricted stock units are scheduled to vest on February 28, 2019 and one-half of the restricted stock units are scheduled to vest on February 28, 2020. ( 14 )Restricted Stock Units granted to the reporting person under the Issuer's Amended and Restated Omnibus Incentive Plan equal to the same amount of shares of common stock. The restricted stock units vest annually over 4 years (25% per year beginning February 28, 2019).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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