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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1. Name and Address of Reporting Person * GRIES CHARLES J   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 _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O MB FINANCIAL, INC., 6111 NORTH RIVER ROAD 3. Date of Earliest Transaction (Month/Day/Year) 08/25/2006 (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 08/25/2006   A   2,067 A $ 0 (1) 2,067 D   Common Stock 08/25/2006   A   3,057 A $ 0 (2) 3,057 I Charles J. Gries Profit Sharing and Cash Deferred Plan

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

Stock Option (Right to Buy)

$ 20.8

08/25/2006

A

1,034

08/25/2006(3)

05/06/2013

Common Stock

1,034

$ 0

1,034

D

Stock Option (Right to Buy)

$ 28.86

08/25/2006

A

1,550

08/25/2006(4)

05/04/2014

Common Stock

1,550

$ 0

1,550

D

Stock Option (Right to Buy)

$ 27.28

08/25/2006

A

1,550

08/25/2006(5)

05/10/2015

Common Stock

1,550

$ 0

1,550

D

Director Stock Units

$ 0

08/25/2006

A

6,258

(6)

(6)

Common Stock

6,258

$ 0

6,258

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
GRIES CHARLES J C/O MB FINANCIAL, INC. 6111 NORTH RIVER ROAD ROSEMONT, IL 60018	X

Signatures

/s/ Doria L. Koros, attorney-in-fact for Mr. Gries		08/29/2006
**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)	Received in exchange for 2,000 shares of the common stock of First Oak Brook Bancshares, Inc. ("FOBB") in connection with the merger (the "Merger") of FOBB with MB Financial, Inc. ("MBFI"). On August 25, 2006, the effective date of the merger, the closing price of MBFI common stock was $36.03 and the closing price of FOBB common stock was $37.30.
(2)	Received in exchange for 2,958 shares of FOBB common stock in connection with the Merger.
(3)	Received in the Merger in exchange for an option to purchase 1,000 shares of FOBB common stock at an exercise price of $21.50 per share.
(4)	Received in the Merger in exchange for an option to purchase 1,500 shares of FOBB common stock at an exercise price of $29.83 per share.
(5)	Received in the Merger in exchange for an option to purchase 1,500 shares of FOBB common stock at an exercise price of $28.20 per share.
(6)	Received in the Merger in exchange for director stock units (representing deferred director fees) ('DSUs") for 6,055 shares of FOBB common stock.

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