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 * FEIGER MITCHELL   2. Issuer Name and Ticker or Trading Symbol MB FINANCIAL INC /MD [MBFI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O MB FINANCIAL, INC., 6111 NORTH RIVER ROAD 3. Date of Earliest Transaction (Month/Day/Year) 02/22/2018 (Street) ROSEMONT, IL 60018 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 02/22/2018   M   1,697 (1) A $ 41.58 145,993 D   Common Stock 02/22/2018   M   3,545 (1) A $ 41.58 149,538 D   Common Stock 02/22/2018   F   2,323 (2) D $ 41.58 147,215 D   Common Stock               16,327 I By 401(k) Common Stock               1,408 I By Children Common Stock               7,994 I By Deferred Comp Plan Common Stock               15,775 I By Ira Common Stock               12,148 I By Spouse's IRA Common Stock               28,180 I By Trust Common Stock               146,239 I Revocable Living Trust Common Stock               65,281 I Spouse's Revocable Living 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
Restricted Stock Units	$ 0	02/22/2018		M			1,697 (1)	(3)	(3)	Common Stock	1,697	$ 0	1,697	D
Restricted Stock Units	$ 0	02/22/2018		M			3,545 (1)	(4)	(4)	Common Stock	3,545	$ 0	10,633	D
Stock Option (Right to Buy)	$ 29							06/25/2012	06/25/2018(5)	Common Stock	54,108		54,108	D
Stock Option (Right to Buy)	$ 24.65							06/25/2012	06/25/2018(5)	Common Stock	66,275		66,275	D
Stock Option (Right to Buy)	$ 20.4							08/29/2013(6)	08/29/2022	Common Stock	23,124		23,124	D
Stock Option (Right to Buy)	$ 27.09							08/28/2014(6)	08/28/2023	Common Stock	18,988		18,988	D
Stock Option (Right to Buy)	$ 29.8							02/26/2015(6)	02/26/2024(6)	Common Stock	19,648		19,648	D
Stock Option (Right to Buy)	$ 31.26							02/25/2016(7)	02/25/2025(7)	Common Stock	14,034		14,034	D
Performance Share Units	$ 0							(8)	(8)	Common Stock	18,228		18,228	D
Stock Option (Right to Buy)	$ 30.33							02/24/2017(9)	02/24/2026(9)	Common Stock	20,480		20,480	D
Performance Share Units	$ 0							(8)	(8)	Common Stock	23,330		23,330	D
Restricted Stock Units	$ 0							(10)	(10)	Common Stock	1,202		1,202	D
Restricted Stock Units	$ 0							(11)	(11)	Common Stock	13,998		13,998	D
Stock Option (Right to Buy)	$ 45.67							(12)	(12)	Common Stock	16,968		16,968	D
Performance Share Units	$ 0							(8)	(8)	Common Stock	17,722		17,722	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
FEIGER MITCHELL C/O MB FINANCIAL, INC. 6111 NORTH RIVER ROAD ROSEMONT, IL 60018	X		President and CEO

Signatures

/s/ Doria L. Koros, Attorney-in-fact for Mr. Feiger		02/26/2018
**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)	Transaction represents the settlement of restricted stock units.
(2)	Transaction represents withholding of shares to satisfy tax withholding obligation upon settlement of restricted stock units.
(3)	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.
(4)	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).
(5)	Grant to reporting person of option to purchase shares of common stock under Issuer's 1997 Omnibus Incentive Plan. The option is 100% vested.
(6)	Grant to reporting person of option to purchase shares of common stock under Issuer's Amended and Restated Omnibus Incentive Plan. The option vests ratably over 4 years (25% per year).
(7)	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).
(8)	Performance based vesting
(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 24, 2017).
(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 24, 2017 and one-half of the restricted stock units are scheduled to vest on February 24, 2018.
(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 24, 2017).
(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 22, 2018).

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