UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): January 26, 2012

MB FINANCIAL, INC.

(Exact name of registrant as specified in its charter)

Maryland	0-24566-01	36-4460265
(State or other jurisdiction of incorporation)	(Commission File No.)	(IRS Employer Identification No.)
800 West Madison Street, Chicago, Illinois 60607
(Address of principal executive offices) (Zip Code)
Registrant’s telephone number, including area code:  (888) 422-6562
N/A
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[  ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[  ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17CFR 240.13e-4(c))

Item 2.02 Results of Operations and Financial Condition

On January 26, 2012, the Registrant issued a press release announcing its 2011 fourth quarter results of operations.  A copy of the press release, including unaudited financial information released as a part thereof, is attached as Exhibit 99 to this Current Report on Form 8-K and incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits

Exhibit 99

Press release of MB Financial, Inc.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, MB Financial, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 26th day of January 2012.

MB FINANCIAL, INC.

By:  /s/Jill E. York

Jill E. York

Vice President and Chief Financial Officer

(Principal Financial and Principal Accounting Officer)

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EXHIBIT INDEX
Exhibit Number	Description of Exhibits
99	Registrant’s January 26, 2012 press release announcing its 2011 fourth quarter results of operations.

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