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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

YORK JILL E
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
__ X __ Officer (give title below)      _____ Other (specify below)
Vice President
(Last)          (First)          (Middle)

C/O MB FINANCIAL, INC., 6111 NORTH RIVER ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)

11/21/2017
(Street)

ROSEMONT, IL 60018
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   11/21/2017     S    5000   D $44.60   65430   D    
Common Stock                  572   I   By Deferred Comp Plan  
Common Stock                  20   I   By Ira  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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
Stock Option (Right to Buy)   $29.00                    6/25/2012   (1) 6/25/2018   Common Stock   26344     26344   D    
Stock Option (Right to Buy)   $24.65                    6/25/2012   (1) 6/25/2018   Common Stock   4056     4056   D    
Stock Option (Right to Buy)   $20.40                    8/29/2013   (2) 8/29/2022   Common Stock   7229     7229   D    
Stock Option (Right to Buy)   $27.09                    8/28/2014   (2) 8/28/2023   Common Stock   6624     6624   D    
Stock Option (Right to Buy)   $29.80                    2/26/2015   (2) 2/26/2024   (2) Common Stock   6259     6259   D    
Stock Option (Right to Buy)   $31.26                    2/25/2016   (3) 2/25/2025   (3) Common Stock   4512     4512   D    
Performance Share Units   $0                      (4)   (4) Common Stock   5861     5861   D    
Stock Option (Right to Buy)   $30.33                    2/24/2017   (5) 2/24/2026   (5) Common Stock   6062     6062   D    
Performance Share Units   $0                      (4)   (4) Common Stock   6905     6905   D    
Restricted Stock Units   $0                      (6)   (6) Common Stock   560     560   D    
Restricted Stock Units   $0                      (7)   (7) Common Stock   4143     4143   D    
Stock Option (Right to Buy)   $45.67                      (8)   (8) Common Stock   4075     4075   D    
Performance Share Units   $0                      (4)   (4) Common Stock   4257     4257   D    
Restricted Stock Units   $0                      (9)   (9) Common Stock   1051     1051   D    
Restricted Stock Units   $0                      (10)   (10) Common Stock   3405     3405   D    

Explanation of Responses:
(1)  Grant to reporting person of option to purchase shares of common stock under Issuer's 1997 Omnibus Incentive Plan. The option is 100% vested.
(2)  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).
(3)  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).
(4)  Performance based vesting
(5)  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).
(6)  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.
(7)  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).
(8)  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).
(9)  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.
(10)  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).

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
YORK JILL E
C/O MB FINANCIAL, INC.
6111 NORTH RIVER ROAD
ROSEMONT, IL 60018


Vice President

Signatures
/s/ Doria L. Koros, Attorney-in-Fact for Ms. York 11/22/2017
** Signature of Reporting Person Date


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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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