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  <p style="font-weight:bold;line-height:normal;margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;">UNITED STATES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES
  AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington,
  D.C.&#160; 20549</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <h2 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;">FORM&nbsp;8-K</font></b></h2>
  
  <h2 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></h2>
  
  <h1 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;">CURRENT REPORT</font></b></h1>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <h1 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;">Pursuant to Section&nbsp;13 or 15(d)&nbsp;of the</font></b></h1>
  
  <h1 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;">Securities Exchange Act of 1934</font></b></h1>
  
  <h1 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></h1>
  
  <h1 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">Date of Report (Date of earliest
  event reported):</font></b><font size="2" style="font-size:10.0pt;"> May&nbsp;20,
  2008</font></h1>
  
  <h1 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></h1>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">MB
  FINANCIAL, INC.</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of
  registrant as specified in its charter)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
  
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    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Maryland</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">0-24566-01</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">36-4460265</font></b></p>
    </td>
   </tr>
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    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other
    jurisdiction</font></p>
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">of
    incorporation)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission File
    No.)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer</font></p>
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Identification
    No.)</font></p>
    </td>
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">800 West
  Madison Street, Chicago, Illinois 60607</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of
  principal executive offices) (Zip Code)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Registrant&#146;s
  telephone number, including area code:<b>&#160; (888) 422-6562</b></font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">N/A</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Former name or
  former address, if changed since last report)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box
  below if the Form&nbsp;8-K filing is intended to simultaneously satisfy the
  filing obligation of the registrant under any of the following provisions:</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;
  Written communications pursuant to Rule&nbsp;425 under the Securities
  Act (17 CFR 230.425)</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;
  Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act
  (17 CFR 240.14a-12)</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;
  Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under
  the Exchange Act (17 CFR 240.14d-2(b))</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;
  Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under
  the Exchange Act (17CFR 240.13e-4(c))</font></p>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;margin:0in 0in .0001pt;padding:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Item 7.01. Regulation FD
  Disclosure</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Forward-Looking
  Statements</font></b></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">When used in this
  Current Report on Form&nbsp;8-K and in other reports filed with or furnished to
  the Securities and Exchange Commission, in other press releases or other public
  shareholder communications, or in oral statements made with the approval of an
  authorized executive officer, the words or phrases &#147;believe,&#148; &#147;will,&#148; &#147;should,&#148;
  &#147;will likely result,&#148; &#147;are expected to,&#148; &#147;will continue,&#148; &#147;is anticipated,&#148; &#147;estimate,&#148;
  &#147;project,&#148; &#147;plans,&#148; or similar expressions are intended to identify &#147;forward-looking
  statements&#148; within the meaning of the Private Securities Litigation Reform Act
  of 1995. You are cautioned not to place undue reliance on any forward-looking
  statements, which speak only as of the date made.&#160; These statements may relate to MB Financial,&nbsp;Inc.&#146;s
  future financial performance, strategic plans or objectives, revenues or
  earnings projections, or other financial items.&#160;
  By their nature, these statements are subject to numerous uncertainties
  that could cause actual results to differ materially from those anticipated in
  the statements.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Important factors that
  could cause actual results to differ materially from the results anticipated or
  projected include, but are not limited to, the following: (1)&nbsp;expected
  synergies from our merger and acquisition activities, including our recently
  completed acquisition of Cedar Hill Associates, might not be realized within
  the expected time frames; (2)&nbsp;the credit risks of lending activities,
  including changes in the level and direction of loan delinquencies and
  write-offs and changes in estimates of the adequacy of the allowance for loan
  losses; (3)&nbsp;competitive pressures among depository institutions; (4)&nbsp;interest
  rate movements and their impact on customer behavior and net interest margin; (5)&nbsp;the
  impact of repricing and competitors&#146; pricing initiatives on loan and deposit
  products; (6)&nbsp;the ability to adapt successfully to technological changes
  to meet customers&#146; needs and developments in the market place; (7)&nbsp;our
  ability to realize the residual values of our direct finance, leveraged, and
  operating leases; (8)&nbsp;our ability to access cost-effective funding; (9)&nbsp;changes
  in financial markets; (10)&nbsp;changes in economic conditions in general and
  in the Chicago metropolitan area in particular; (11) the costs, effects and
  outcomes of litigation; (12) new legislation or regulatory changes, including
  but not limited to changes in federal and/or state tax laws or interpretations
  thereof by taxing authorities; (13) changes in accounting principles, policies
  or guidelines; (14) our future acquisitions of other depository institutions or
  lines of business; (15) the impact of&#160;
  the guidance recently prepared by the Office of the Comptroller of the
  Currency regarding concentrations in real estate lending.</font></p>
  
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MB Financial does
  not undertake any obligation to update any forward-looking statement to reflect
  circumstances or events that occur after the date on which the forward-looking
  statement is made.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Set forth below are investor
  presentation materials.</font></p>
  
  <h3 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:normal;">&nbsp;</font></b></h3>
  
  <div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
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  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div align="center">
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr style="page-break-inside:avoid;">
    <td width="1152" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:12.0in;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" color="white" face="Times New Roman" style="color:white;"><img width="780" height="587" src="g148781bci001.jpg" alt="GRAPHIC"></font></p>
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    <td width="96" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:1.0in;">
    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">Mitchell
    Feiger, Chief Executive Officer and President Jill E. York, Vice President
    and Chief Financial Officer May 20, 2008 NASDAQ: MBFI Investor Presentation </font></p>
    </td>
   </tr>
  </table>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
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  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr style="page-break-inside:avoid;">
    <td width="1152" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:12.0in;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" color="white" face="Times New Roman" style="color:white;"><img width="780" height="587" src="g148781bci002.jpg" alt="GRAPHIC"></font></p>
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    <td width="96" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:1.0in;">
    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">2 When used in
    this press release and in filings with the Securities and Exchange Commission,
    in other press releases or other public shareholder communications, or in
    oral statements made with the approval of an authorized executive officer,
    the words or phrases &quot;believe,&quot; &quot;will,&quot;
    &quot;should,&quot; &quot;will likely result,&quot; &quot;are expected
    to,&quot; &quot;will continue,&quot; &quot;is anticipated,&quot;
    &quot;estimate,&quot; &quot;project,&quot; &quot;plans,&quot; or similar
    expressions are intended to identify &quot;forward-looking statements&quot;
    within the meaning of the Private Securities Litigation Reform Act of 1995.
    You are cautioned not to place undue reliance on any forward-looking
    statements, which speak only as of the date made. These statements may relate
    to our future financial performance, strategic plans or objectives, revenues
    or earnings projections, or other financial items. By their nature, these statements
    are subject to numerous uncertainties that could cause actual results to
    differ materially from those anticipated in the statements. Important factors
    that could cause actual results to differ materially from the results
    anticipated or projected include, but are not limited to, the following: (1)
    expected cost savings and synergies from our merger and acquisition
    activities might not be realized within the expected time frames; (2) the
    credit risks of lending activities, including changes in the level and
    direction of loan delinquencies and write-offs and changes in estimates of
    the adequacy of the allowance for loan losses; (3) competitive pressures
    among depository institutions; (4) interest rate movements and their impact
    on customer behavior and net interest margin; (5) the impact of repricing and
    competitors' pricing initiatives on loan and deposit products; (6) the
    ability to adapt successfully to technological changes to meet customers'
    needs and developments in the market place; (7) our ability to realize the
    residual values of our direct finance, leveraged, and operating leases; (8)
    our ability to access cost-effective funding; (9) changes in financial
    markets; (10) changes in economic conditions in general and in the Chicago
    metropolitan area in particular; (11) the costs, effects and outcomes of
    litigation; (12) new legislation or regulatory changes, including but not
    limited to changes in federal and/or state tax laws or interpretations
    thereof by taxing authorities; (13) changes in accounting principles,
    policies or guidelines; and (14) our future acquisitions of other depository
    institutions or lines of business. MB Financial does not undertake any
    obligation to update any forward-looking statement to reflect circumstances
    or events that occur after the date on which the forward-looking statement is
    made. Forward Looking Statements </font></p>
    </td>
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  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
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    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" color="white" face="Times New Roman" style="color:white;"><img width="780" height="587" src="g148781bci003.jpg" alt="GRAPHIC"></font></p>
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    <td width="96" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:1.0in;">
    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">3 Who Are We?
    Financial profile1: $8.1bn in assets $5.8bn in loans $5.7bn in deposits $55mm
    in net income2 Rapidly growing Commercial Bank serving middle market
    companies: Over 115 calling officers with 20+ years average experience Retail
    and wealth management business lines support our commercial bank Expanding,
    desirable branch network 74 full service Chicagoland branches Strategically
    located to have access to 79% of middle market companies 4th largest
    Chicago-based bank Opportunistic acquisitions add scale, capabilities and
    market share 1 As of March 31, 2008. 2 Based on 2008 IBES. Chicago MSA </font></p>
    </td>
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">4 Commercial
    Banking Largest, most developed business unit, drives company performance
    Loans to middle-market companies with revenues ranging from $5 to $100mm
    Treasury Management products for all company sizes Double digit organic
    growth every year Focused on: Middle-market business financing Treasury
    management Real estate investor, construction, developer financing Lease
    banking $826 $1,081 $1,190 $1,416 $1,709 $1,977 $2,656 $2,819 $2,870 $718
    $717 $775 $848 $944 $1,039 $1,413 $1,877 $2,015 $1,544 $1,798 $1,965 $2,264
    $2,653 $3,016 $4,696 $4,885 $4,069 $0 $1,000 $2,000 $3,000 $4,000 $5,000 2000
    2001 2002 2003 2004 2005 2006 2007 1Q2008 Millions Commercial and Industrial
    (including lease loans) Commercial Real Estate (including construction real
    estate) 1 FOBB merger added $632mm in commercial-related loans. 2 Excludes
    impact of FOBB merger. Including FOBB CAGR = 17%. 1 +15% CAGR2 </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">5 Credit
    Quality Excellent for a commercial focused bank Loans are granular &#150; typical
    size is $5 to $10 million Quarterly charge-offs can be &#147;lumpy&#148; Weakness in
    &#147;For Sale Residential&#148; construction sector impacted NPL&#146;s in first quarter
    2008 Net Charge-offs to Average Loans 0.45% 0.25% 0.24% 0.25% 0.63% 0.39%
    0.24% 0.31% 0.16% 0.00% 0.20% 0.40% 0.60% 0.80% 1.00% 2000 2001 2002 2003
    2004 2005 2006 2007 1Q2008 Allowance vs. NPL to Total Loans 1.35% 1.16% 1.19%
    1.19% 1.38% 1.42% 1.27% 1.33% 1.22% 0.87% 0.44% 0.43% 0.85% 0.83% 0.79% 0.92%
    0.71% 0.58% 0.00% 0.20% 0.40% 0.60% 0.80% 1.00% 1.20% 1.40% 1.60% 2000 2001
    2002 2003 2004 2005 2006 2007 1Q2008 Allowance to Total Loans NPL to Total Loans
    </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">6 Diversified
    Loan Portfolio Commercial 34% Construction 14% Commercial Real Estate 36%
    Residential, Consumer and Indirect 16% As of December 31, 2007 For Sale
    Residential Construction 19% Commercial Construction 11% Owner occupied 19%
    Multi-family 9% Non-owner occupied: Commercial 16% Retail 9%
    Industrial/Warehouse 7% Healthcare 6% Office 4% Construction and Commercial
    Real Estate </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">7 Retail
    Banking Retail Banking provides much of the funding for our commercial
    lending business Provides 63% of our deposits Generates 16% of our loans
    Excellent Chicagoland branch footprint Key differentiation attributes
    Convenience &#150; Extended branch hours and open 7 days/week in most branches ATM
    Freedom &#150; Qualifying customers can use any ATM in the world at no cost
    Extended deposit cut-off times &#150; Accelerates cash availability 2008
    objectives Grow low cost account balances Improve deposit mix $391 $431 $456
    $552 $623 $641 $924 $876 $866 $447 $496 $490 $620 $713 $636 $1,041 $1,263
    $1,220 $311 $325 $352 $448 $523 $469 $391 $390 $1,079 $1,202 $1,316 $1,396
    $1,568 $1,545 $2,572 $2,506 $2,589 $272 $615 $570 $478 $615 $474 $0 $1,000
    $2,000 $3,000 $4,000 $5,000 $6,000 $7,000 2000 2001 2002 2003 2004 2005 2006
    2007 1Q2008 Millions Brokered CDs Time &amp; Public Funds Savings NOW &amp;
    MMDA Non-Interest Bearing $5,581 $5,514 $2,780 $2,577 $3,176 $3,699 $3,906
    $2,372 $5,680 1 1 FOBB merger added $1.9 billion in deposits. 2 Excludes
    impact of FOBB merger. Including FOBB CAGR = 13%. +6% CAGR2 </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">8 Wealth
    Management $0.2 $0.4 $0.3 $0.2 $0.6 $0.6 $0.8 $1.1 $0.4 $0.5 $0.8 $0.9 $2.1
    $1.9 $0.9 $2.6 $1.0 $1.2 $0.0 $0.5 $1.0 $1.5 $2.0 $2.5 $3.0 $3.5 $4.0 2000
    2002 2004 2006 4/30/08 Assets Under Management (Billions) Managed Assets
    Non-Discretionary Assets Private Banking Targets wealthy individuals and
    business owners Rapidly growing, with profitability metrics similar to
    Commercial Banking Asset Management and Trust Target market Wealthy
    individuals Middle market business owners and their families Illinois police
    and fire retirement funds Guardianships Recently acquired Cedar Hill
    Associates with over $960 million in assets under management Vision
    Investment Services Focused on providing brokerage services through our
    branch network Improving profitability 1 FOBB merger added $1.2 billion in
    assets under management. 2 $0.6 $0.7 $3.0 $0.7 $1.4 $1.5 $1.7 $3.1 $3.8 2
    Includes Cedar Hill acquisition. 1 </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">9 Chicago&#146;s
    Attractive Market Opportunity $268bn $63bn $52bn $41bn $43bn $37bn $25bn
    37.7% 10.6% 10.7% 23.9% 39.1% 22.8% 17.9% 43.3% 13.0% 17.6% 40.2% 61.4% 53.2%
    62.9% 36.2% 56.7% 59.1% 26.3% 60.3% 51.6% $31bn $61bn $88bn Chicago Detroit
    Cleveland Minneapolis St. Louis Milwaukee Cincinnati Kansas City Columbus
    Indianapolis Top 3 4-5 6-10 &gt; 10 Total # banks/thrifts 262 55 40 160 136 57
    81 136 55 54 Av g. deposits per bank/thrift ($mm) 1,024 1,605 1,512 394 380
    720 527 274 556 464 # banks/thrifts &gt; 1% share 15 11 13 8 17 17 14 21 13
    17 Source: SNL DataSource. Deposit data for Midwestern MSAs as of June 30,
    2007. Includes pending acquisitions through May 14, 2008. The Opportunity The
    Opportunity The $101bn in deposits held by banking institutions outside the
    top 10 is larger than all other Midwestern MSAs in their entirety </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">10 40.2% 40.9%
    41.4% 44.5% 45.8% 46.1% 53.1% 54. 1% 59.0% 59.5% 0% 20% 40% 60% 80% Chicago
    Los Angeles Miami Philadelphia Washington New York Dallas Boston San
    Francisco Atlanta ` Rank Institution Branches Total Deposits in Market ($mm)
    Total Market Share (%) 1 Bank of America 202 39,100 14.6 2 JPMorgan Chase 361
    38,956 14.5 3 Harris (Bank of Montreal) 205 29,738 11.1 4 National City 136
    10,748 4.0 5 Northern Trust 19 8,950 3.3 6 Fifth Third 150 8,444 3.2 7 Corus
    Bankshares 14 8,399 3.1 8 Charter One (Royal Bank of Scotland) 132 7,828 2.9
    9 Citigroup 72 7,551 2.8 10 Wintrust Financial 75 7,219 2.7 11 MB Financial
    74 5,408 2.0 12 First Midwest 89 5,185 1.9 13 FBOP 31 3,306 1.2 14 TCF
    Financial 209 3,119 1.2 15 Metropolitan Bank Group 86 2,766 1.0 All Other
    Institutions 81,439 30.4 MSA Total 3,324 268,158 100.0 Strong Position in the
    Nation&#146;s Least Consolidated Major Market Source: SNL DataSource. Data as of
    June 30, 2007. Includes pending acquisitions through May 14, 2008. Chicago
    MSA Rankings Market Share of Top 3 in the Ten Largest U.S. MSAs </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">11 Disciplined
    Acquiror and Experienced Integrator Chicago is the least consolidated of the
    nation&#146;s top 10 MSAs Strive to be the &#147;partner of choice&#148; for sellers Look
    for mutual win situations The Opportunity Strong Track Record 1 P/E Adjusted
    is computed as (price &#150; excess equity) / (pre-acquisition core earnings +
    after-tax cost savings in year one &#150; after tax earnings on excess equity).
    Target Acquisition Date Asset Size ($mm) Disciplined Pricing. Median
    Statistics for Above Transactions First Oak Brook Aug &#146;06 $2,362 First Security
    Fed May &#146;04 567 South Holland Feb &#146;03 560 LaSalle Leasing Aug &#146;02 92
    Lincolnwood Apr &#146;02 228 FSL Holdings Apr &#146;01 222 P / E Stated 17.4x P / E
    Adjusted1 9.7x Price / Book 1.4x Premium / Core Deposits 6.9% 1st Year EPS
    Accretion 3.5% </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">12 3.74% 3.71%
    3.99% 3.80% 3.77% 3.74% 3.51% 3.32% 3.22% -1.00% 0.00% 1.00% 2.00% 3.00%
    4.00% 5.00% 6.00% 7.00% 2000 2001 2002 2003 2004 2005 2006 2007 1Q 2008 NIM A
    to LIBOR BBB to LIBOR BB to LIBOR Net Interest Margin and Historical Credit
    Spreads* Credit spreads are a leading indicator for our long-term net
    interest margin Compression in first quarter 2008 primarily due to the rapid
    decrease in overall interest rates * Bloomberg Industrial Composite one year
    rates to twelve month Libor. </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">13 Composition
    of Total Revenue First Quarter 2008 Fee Income1 30.7% of Total Revenue1 Focus
    on growing fee income Diversification of revenue streams is important to us
    Likely expansion areas include deposit fees, trust and asset management,
    leasing and merchant card processing Net Interest Income 69.3% of Total
    Revenue1 Deposit Service Fees 8.3% Merchant Processing Fees 5.9% Lease
    Financing Revenues 5.0% Trust and Asset Mgmt and Brokerage Fees 4.2% Loan
    Service Fees 3.2% All Other Fees 4.1%1 1 Excludes gain on sale of securities
    and loss on sale of other assets. </font></p>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">14 Operating
    Efficiency Efficiency Ratio Striving to cut expenses and improve our
    operating leverage Shed excess properties / non-core businesses in 2007 0%
    10% 20% 30% 40% 50% 60% 70% 80% 90% 2000 2001 2002 2003 2004 2005 2006 2007
    1Q2008 </font></p>
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    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" color="white" face="Times New Roman" style="color:white;"><img width="780" height="587" src="g148781bci015.jpg" alt="GRAPHIC"></font></p>
    </td>
    <td width="96" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:1.0in;">
    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">15 Key
    Investment Considerations Build Commercial Banking market share Strategy
    Implementation Add Commercial lenders Add Private Bankers Hire recent college
    graduates for training program Emphasize Commercial Banking in branding Grow
    fee income and diversify revenue streams Improve operating leverage Build
    Wealth Management profitability Acquire opportunistically Enhance Leasing and
    Brokerage contribution Improve facilities management Improve vendor
    management Improve operating procedures </font></p>
    </td>
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    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">16 Non-GAAP
    Disclosure Reconciliations 2000 2001 2002 2003 2004 2005 2006 2007 3/31/2008
    Net interest margin 3.64% 3.62% 3.93% 3.72% 3.67% 3.62% 3.40% 3.20% 3.10%
    Plus: Tax equivalent effect 0.10% 0.08% 0.06% 0.08% 0.10% 0.12% 0.11% 0.12%
    0.12% Net interest margin, fully tax equivalent 3.74% 3.71% 3.99% 3.80% 3.77%
    3.74% 3.51% 3.32% 3.22% This schedule reconciles one financial measure in our
    presentation determined by a method other than in accordance with accounting
    principles generally accepted in the United States of America (&#147;GAAP&#148;). This
    measure is net interest margin on a fully tax equivalent basis. Net interest
    margin on a fully tax equivalent basis is determined by dividing net interest
    income on a fully tax equivalent basis by average interest-earning assets.
    The most directly comparable GAAP measure, net interest margin, is determined
    by dividing net interest income by average interest-earning assets. The tax
    equivalent adjustment to net interest income recognizes the income tax
    savings when comparing taxable and tax-exempt assets and assumes a 35% tax
    rate. We believe that it is a standard practice in the banking industry to
    present net interest margin on a fully tax equivalent basis, and accordingly
    believe that providing this measure may be useful for peer comparison
    purposes. The following table reconciles net interest margin on a fully tax
    equivalent basis to net interest margin for the periods presented: </font></p>
    </td>
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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    <td width="1152" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:12.0in;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" color="white" face="Times New Roman" style="color:white;"><img width="780" height="587" src="g148781bci001.jpg" alt="GRAPHIC"></font></p>
    </td>
    <td width="96" valign="top" style="padding:0in 5.4pt 0in 5.4pt;width:1.0in;">
    <p style="margin:0in 0in .0001pt;"><font size="1" color="white" face="Times New Roman" style="color:white;font-size:1.0pt;">Mitchell
    Feiger, Chief Executive Officer and President Jill E. York, Vice President
    and Chief Financial Officer May 20, 2008 NASDAQ: MBFI Investor Presentation </font></p>
    </td>
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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  <h3 style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">SIGNATURES</font></b></h3>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the
  requirements of the Securities Exchange Act of 1934, MB Financial,&nbsp;Inc.
  has duly caused this report to be signed on its behalf by the undersigned,
  thereunto duly authorized, on the 20th day of May, 2008.</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="58%" colspan="3" valign="top" style="padding:0in 0in 0in 0in;width:58.9%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">MB FINANCIAL, INC.</font></b></p>
    </td>
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    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.34%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="52%" valign="top" style="padding:0in 0in 0in 0in;width:52.3%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
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    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.34%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="52%" valign="top" style="padding:0in 0in 0in 0in;width:52.3%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
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    <td width="43%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:43.36%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.34%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">By:</font></b></p>
    </td>
    <td width="52%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:52.3%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">/s/ Jill E. York</font></b></p>
    </td>
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    <td width="43%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:43.36%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.34%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="52%" valign="top" style="padding:0in 0in 0in 0in;width:52.3%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Jill E. York</font></p>
    </td>
   </tr>
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    <td width="100%" colspan="4" valign="top" style="padding:0in 0in 0in 0in;width:100.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Vice President
    and Chief Financial Officer</font></p>
    </td>
   </tr>
   <tr>
    <td width="100%" colspan="4" valign="top" style="padding:0in 0in 0in 0in;width:100.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">(Principal
    Financial and Principal Accounting Officer)</font></i></p>
    </td>
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metadata_filer: {"company-data": {"conformed-name": "MB FINANCIAL INC     /MD", "cik": "0001139812", "assigned-sic": "6035", "irs-number": "363132116", "state-of-incorporation": "MD", "fiscal-year-end": "1205"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-24566-01", "film-number": "08849519"}, "business-address": {"street1": "801 WEST MADISON STREET", "city": "CHICAGO", "state": "IL", "zip": "60607", "phone": "3124217600"}, "mail-address": {"street1": "1200 NORTH ASHLAND AVENUE", "city": "CHICAGO", "state": "IL", "zip": "60622"}, "former-company": [{"former-conformed-name": "MB FINANCIAL INC/IL", "date-changed": "20011113"}, {"former-conformed-name": "MB MIDCITY INC", "date-changed": "20010502"}]}
text: 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):
  May 20,
  2008
  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:
  o
  Written communications pursuant to Rule 425 under the Securities
  Act (17 CFR 230.425)
  o
  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
  (17 CFR 240.14a-12)
  o
  Pre-commencement communications pursuant to Rule 14d-2(b) under
  the Exchange Act (17 CFR 240.14d-2(b))
  o
  Pre-commencement communications pursuant to Rule 13e-4(c) under
  the Exchange Act (17CFR 240.13e-4(c))
  Item 7.01. Regulation FD
  Disclosure
  Forward-Looking
  Statements
  When used in this
  Current Report on Form 8-K and in other reports filed with or furnished to
  the Securities and Exchange Commission, in other press releases or other public
  shareholder communications, or in oral statements made with the approval of an
  authorized executive officer, the words or phrases "believe," "will," "should,"
  "will likely result," "are expected to," "will continue," "is anticipated," "estimate,"
  "project," "plans," or similar expressions are intended to identify "forward-looking
  statements" within the meaning of the Private Securities Litigation Reform Act
  of 1995. You are cautioned not to place undue reliance on any forward-looking
  statements, which speak only as of the date made.  These statements may relate to MB Financial, Inc.'s
  future financial performance, strategic plans or objectives, revenues or
  earnings projections, or other financial items. 
  By their nature, these statements are subject to numerous uncertainties
  that could cause actual results to differ materially from those anticipated in
  the statements.
  Important factors that
  could cause actual results to differ materially from the results anticipated or
  projected include, but are not limited to, the following: (1) expected
  synergies from our merger and acquisition activities, including our recently
  completed acquisition of Cedar Hill Associates, might not be realized within
  the expected time frames; (2) the credit risks of lending activities,
  including changes in the level and direction of loan delinquencies and
  write-offs and changes in estimates of the adequacy of the allowance for loan
  losses; (3) competitive pressures among depository institutions; (4) interest
  rate movements and their impact on customer behavior and net interest margin; (5) the
  impact of repricing and competitors' pricing initiatives on loan and deposit
  products; (6) the ability to adapt successfully to technological changes
  to meet customers' needs and developments in the market place; (7) our
  ability to realize the residual values of our direct finance, leveraged, and
  operating leases; (8) our ability to access cost-effective funding; (9) changes
  in financial markets; (10) changes in economic conditions in general and
  in the Chicago metropolitan area in particular; (11) the costs, effects and
  outcomes of litigation; (12) new legislation or regulatory changes, including
  but not limited to changes in federal and/or state tax laws or interpretations
  thereof by taxing authorities; (13) changes in accounting principles, policies
  or guidelines; (14) our future acquisitions of other depository institutions or
  lines of business; (15) the impact of 
  the guidance recently prepared by the Office of the Comptroller of the
  Currency regarding concentrations in real estate lending.
  MB Financial does
  not undertake any obligation to update any forward-looking statement to reflect
  circumstances or events that occur after the date on which the forward-looking
  statement is made.
  Set forth below are investor
  presentation materials.
  Mitchell
    Feiger, Chief Executive Officer and President Jill E. York, Vice President
    and Chief Financial Officer May 20, 2008 NASDAQ: MBFI Investor Presentation
  2 When used in
    this press release and in filings with the Securities and Exchange Commission,
    in other press releases or other public shareholder communications, or in
    oral statements made with the approval of an authorized executive officer,
    the words or phrases "believe," "will,"
    "should," "will likely result," "are expected
    to," "will continue," "is anticipated,"
    "estimate," "project," "plans," or similar
    expressions are intended to identify "forward-looking statements"
    within the meaning of the Private Securities Litigation Reform Act of 1995.
    You are cautioned not to place undue reliance on any forward-looking
    statements, which speak only as of the date made. These statements may relate
    to our future financial performance, strategic plans or objectives, revenues
    or earnings projections, or other financial items. By their nature, these statements
    are subject to numerous uncertainties that could cause actual results to
    differ materially from those anticipated in the statements. Important factors
    that could cause actual results to differ materially from the results
    anticipated or projected include, but are not limited to, the following: (1)
    expected cost savings and synergies from our merger and acquisition
    activities might not be realized within the expected time frames; (2) the
    credit risks of lending activities, including changes in the level and
    direction of loan delinquencies and write-offs and changes in estimates of
    the adequacy of the allowance for loan losses; (3) competitive pressures
    among depository institutions; (4) interest rate movements and their impact
    on customer behavior and net interest margin; (5) the impact of repricing and
    competitors' pricing initiatives on loan and deposit products; (6) the
    ability to adapt successfully to technological changes to meet customers'
    needs and developments in the market place; (7) our ability to realize the
    residual values of our direct finance, leveraged, and operating leases; (8)
    our ability to access cost-effective funding; (9) changes in financial
    markets; (10) changes in economic conditions in general and in the Chicago
    metropolitan area in particular; (11) the costs, effects and outcomes of
    litigation; (12) new legislation or regulatory changes, including but not
    limited to changes in federal and/or state tax laws or interpretations
    thereof by taxing authorities; (13) changes in accounting principles,
    policies or guidelines; and (14) our future acquisitions of other depository
    institutions or lines of business. MB Financial does not undertake any
    obligation to update any forward-looking statement to reflect circumstances
    or events that occur after the date on which the forward-looking statement is
    made. Forward Looking Statements
  3 Who Are We?
    Financial profile1: $8.1bn in assets $5.8bn in loans $5.7bn in deposits $55mm
    in net income2 Rapidly growing Commercial Bank serving middle market
    companies: Over 115 calling officers with 20+ years average experience Retail
    and wealth management business lines support our commercial bank Expanding,
    desirable branch network 74 full service Chicagoland branches Strategically
    located to have access to 79% of middle market companies 4th largest
    Chicago-based bank Opportunistic acquisitions add scale, capabilities and
    market share 1 As of March 31, 2008. 2 Based on 2008 IBES. Chicago MSA
  4 Commercial
    Banking Largest, most developed business unit, drives company performance
    Loans to middle-market companies with revenues ranging from $5 to $100mm
    Treasury Management products for all company sizes Double digit organic
    growth every year Focused on: Middle-market business financing Treasury
    management Real estate investor, construction, developer financing Lease
    banking $826 $1,081 $1,190 $1,416 $1,709 $1,977 $2,656 $2,819 $2,870 $718
    $717 $775 $848 $944 $1,039 $1,413 $1,877 $2,015 $1,544 $1,798 $1,965 $2,264
    $2,653 $3,016 $4,696 $4,885 $4,069 $0 $1,000 $2,000 $3,000 $4,000 $5,000 2000
    2001 2002 2003 2004 2005 2006 2007 1Q2008 Millions Commercial and Industrial
    (including lease loans) Commercial Real Estate (including construction real
    estate) 1 FOBB merger added $632mm in commercial-related loans. 2 Excludes
    impact of FOBB merger. Including FOBB CAGR = 17%. 1 +15% CAGR2
  5 Credit
    Quality Excellent for a commercial focused bank Loans are granular – typical
    size is $5 to $10 million Quarterly charge-offs can be "lumpy" Weakness in
    "For Sale Residential" construction sector impacted NPL's in first quarter
    2008 Net Charge-offs to Average Loans 0.45% 0.25% 0.24% 0.25% 0.63% 0.39%
    0.24% 0.31% 0.16% 0.00% 0.20% 0.40% 0.60% 0.80% 1.00% 2000 2001 2002 2003
    2004 2005 2006 2007 1Q2008 Allowance vs. NPL to Total Loans 1.35% 1.16% 1.19%
    1.19% 1.38% 1.42% 1.27% 1.33% 1.22% 0.87% 0.44% 0.43% 0.85% 0.83% 0.79% 0.92%
    0.71% 0.58% 0.00% 0.20% 0.40% 0.60% 0.80% 1.00% 1.20% 1.40% 1.60% 2000 2001
    2002 2003 2004 2005 2006 2007 1Q2008 Allowance to Total Loans NPL to Total Loans
  6 Diversified
    Loan Portfolio Commercial 34% Construction 14% Commercial Real Estate 36%
    Residential, Consumer and Indirect 16% As of December 31, 2007 For Sale
    Residential Construction 19% Commercial Construction 11% Owner occupied 19%
    Multi-family 9% Non-owner occupied: Commercial 16% Retail 9%
    Industrial/Warehouse 7% Healthcare 6% Office 4% Construction and Commercial
    Real Estate
  7 Retail
    Banking Retail Banking provides much of the funding for our commercial
    lending business Provides 63% of our deposits Generates 16% of our loans
    Excellent Chicagoland branch footprint Key differentiation attributes
    Convenience – Extended branch hours and open 7 days/week in most branches ATM
    Freedom – Qualifying customers can use any ATM in the world at no cost
    Extended deposit cut-off times – Accelerates cash availability 2008
    objectives Grow low cost account balances Improve deposit mix $391 $431 $456
    $552 $623 $641 $924 $876 $866 $447 $496 $490 $620 $713 $636 $1,041 $1,263
    $1,220 $311 $325 $352 $448 $523 $469 $391 $390 $1,079 $1,202 $1,316 $1,396
    $1,568 $1,545 $2,572 $2,506 $2,589 $272 $615 $570 $478 $615 $474 $0 $1,000
    $2,000 $3,000 $4,000 $5,000 $6,000 $7,000 2000 2001 2002 2003 2004 2005 2006
    2007 1Q2008 Millions Brokered CDs Time & Public Funds Savings NOW &
    MMDA Non-Interest Bearing $5,581 $5,514 $2,780 $2,577 $3,176 $3,699 $3,906
    $2,372 $5,680 1 1 FOBB merger added $1.9 billion in deposits. 2 Excludes
    impact of FOBB merger. Including FOBB CAGR = 13%. +6% CAGR2
  8 Wealth
    Management $0.2 $0.4 $0.3 $0.2 $0.6 $0.6 $0.8 $1.1 $0.4 $0.5 $0.8 $0.9 $2.1
    $1.9 $0.9 $2.6 $1.0 $1.2 $0.0 $0.5 $1.0 $1.5 $2.0 $2.5 $3.0 $3.5 $4.0 2000
    2002 2004 2006 4/30/08 Assets Under Management (Billions) Managed Assets
    Non-Discretionary Assets Private Banking Targets wealthy individuals and
    business owners Rapidly growing, with profitability metrics similar to
    Commercial Banking Asset Management and Trust Target market Wealthy
    individuals Middle market business owners and their families Illinois police
    and fire retirement funds Guardianships Recently acquired Cedar Hill
    Associates with over $960 million in assets under management Vision
    Investment Services Focused on providing brokerage services through our
    branch network Improving profitability 1 FOBB merger added $1.2 billion in
    assets under management. 2 $0.6 $0.7 $3.0 $0.7 $1.4 $1.5 $1.7 $3.1 $3.8 2
    Includes Cedar Hill acquisition. 1
  9 Chicago's
    Attractive Market Opportunity $268bn $63bn $52bn $41bn $43bn $37bn $25bn
    37.7% 10.6% 10.7% 23.9% 39.1% 22.8% 17.9% 43.3% 13.0% 17.6% 40.2% 61.4% 53.2%
    62.9% 36.2% 56.7% 59.1% 26.3% 60.3% 51.6% $31bn $61bn $88bn Chicago Detroit
    Cleveland Minneapolis St. Louis Milwaukee Cincinnati Kansas City Columbus
    Indianapolis Top 3 4-5 6-10 > 10 Total # banks/thrifts 262 55 40 160 136 57
    81 136 55 54 Av g. deposits per bank/thrift ($mm) 1,024 1,605 1,512 394 380
    720 527 274 556 464 # banks/thrifts > 1% share 15 11 13 8 17 17 14 21 13
    17 Source: SNL DataSource. Deposit data for Midwestern MSAs as of June 30,
    2007. Includes pending acquisitions through May 14, 2008. The Opportunity The
    Opportunity The $101bn in deposits held by banking institutions outside the
    top 10 is larger than all other Midwestern MSAs in their entirety
  10 40.2% 40.9%
    41.4% 44.5% 45.8% 46.1% 53.1% 54. 1% 59.0% 59.5% 0% 20% 40% 60% 80% Chicago
    Los Angeles Miami Philadelphia Washington New York Dallas Boston San
    Francisco Atlanta ` Rank Institution Branches Total Deposits in Market ($mm)
    Total Market Share (%) 1 Bank of America 202 39,100 14.6 2 JPMorgan Chase 361
    38,956 14.5 3 Harris (Bank of Montreal) 205 29,738 11.1 4 National City 136
    10,748 4.0 5 Northern Trust 19 8,950 3.3 6 Fifth Third 150 8,444 3.2 7 Corus
    Bankshares 14 8,399 3.1 8 Charter One (Royal Bank of Scotland) 132 7,828 2.9
    9 Citigroup 72 7,551 2.8 10 Wintrust Financial 75 7,219 2.7 11 MB Financial
    74 5,408 2.0 12 First Midwest 89 5,185 1.9 13 FBOP 31 3,306 1.2 14 TCF
    Financial 209 3,119 1.2 15 Metropolitan Bank Group 86 2,766 1.0 All Other
    Institutions 81,439 30.4 MSA Total 3,324 268,158 100.0 Strong Position in the
    Nation's Least Consolidated Major Market Source: SNL DataSource. Data as of
    June 30, 2007. Includes pending acquisitions through May 14, 2008. Chicago
    MSA Rankings Market Share of Top 3 in the Ten Largest U.S. MSAs
  11 Disciplined
    Acquiror and Experienced Integrator Chicago is the least consolidated of the
    nation's top 10 MSAs Strive to be the "partner of choice" for sellers Look
    for mutual win situations The Opportunity Strong Track Record 1 P/E Adjusted
    is computed as (price – excess equity) / (pre-acquisition core earnings +
    after-tax cost savings in year one – after tax earnings on excess equity).
    Target Acquisition Date Asset Size ($mm) Disciplined Pricing. Median
    Statistics for Above Transactions First Oak Brook Aug '06 $2,362 First Security
    Fed May '04 567 South Holland Feb '03 560 LaSalle Leasing Aug '02 92
    Lincolnwood Apr '02 228 FSL Holdings Apr '01 222 P / E Stated 17.4x P / E
    Adjusted1 9.7x Price / Book 1.4x Premium / Core Deposits 6.9% 1st Year EPS
    Accretion 3.5%
  12 3.74% 3.71%
    3.99% 3.80% 3.77% 3.74% 3.51% 3.32% 3.22% -1.00% 0.00% 1.00% 2.00% 3.00%
    4.00% 5.00% 6.00% 7.00% 2000 2001 2002 2003 2004 2005 2006 2007 1Q 2008 NIM A
    to LIBOR BBB to LIBOR BB to LIBOR Net Interest Margin and Historical Credit
    Spreads* Credit spreads are a leading indicator for our long-term net
    interest margin Compression in first quarter 2008 primarily due to the rapid
    decrease in overall interest rates * Bloomberg Industrial Composite one year
    rates to twelve month Libor.
  13 Composition
    of Total Revenue First Quarter 2008 Fee Income1 30.7% of Total Revenue1 Focus
    on growing fee income Diversification of revenue streams is important to us
    Likely expansion areas include deposit fees, trust and asset management,
    leasing and merchant card processing Net Interest Income 69.3% of Total
    Revenue1 Deposit Service Fees 8.3% Merchant Processing Fees 5.9% Lease
    Financing Revenues 5.0% Trust and Asset Mgmt and Brokerage Fees 4.2% Loan
    Service Fees 3.2% All Other Fees 4.1%1 1 Excludes gain on sale of securities
    and loss on sale of other assets.
  14 Operating
    Efficiency Efficiency Ratio Striving to cut expenses and improve our
    operating leverage Shed excess properties / non-core businesses in 2007 0%
    10% 20% 30% 40% 50% 60% 70% 80% 90% 2000 2001 2002 2003 2004 2005 2006 2007
    1Q2008
  15 Key
    Investment Considerations Build Commercial Banking market share Strategy
    Implementation Add Commercial lenders Add Private Bankers Hire recent college
    graduates for training program Emphasize Commercial Banking in branding Grow
    fee income and diversify revenue streams Improve operating leverage Build
    Wealth Management profitability Acquire opportunistically Enhance Leasing and
    Brokerage contribution Improve facilities management Improve vendor
    management Improve operating procedures
  16 Non-GAAP
    Disclosure Reconciliations 2000 2001 2002 2003 2004 2005 2006 2007 3/31/2008
    Net interest margin 3.64% 3.62% 3.93% 3.72% 3.67% 3.62% 3.40% 3.20% 3.10%
    Plus: Tax equivalent effect 0.10% 0.08% 0.06% 0.08% 0.10% 0.12% 0.11% 0.12%
    0.12% Net interest margin, fully tax equivalent 3.74% 3.71% 3.99% 3.80% 3.77%
    3.74% 3.51% 3.32% 3.22% This schedule reconciles one financial measure in our
    presentation determined by a method other than in accordance with accounting
    principles generally accepted in the United States of America ("GAAP"). This
    measure is net interest margin on a fully tax equivalent basis. Net interest
    margin on a fully tax equivalent basis is determined by dividing net interest
    income on a fully tax equivalent basis by average interest-earning assets.
    The most directly comparable GAAP measure, net interest margin, is determined
    by dividing net interest income by average interest-earning assets. The tax
    equivalent adjustment to net interest income recognizes the income tax
    savings when comparing taxable and tax-exempt assets and assumes a 35% tax
    rate. We believe that it is a standard practice in the banking industry to
    present net interest margin on a fully tax equivalent basis, and accordingly
    believe that providing this measure may be useful for peer comparison
    purposes. The following table reconciles net interest margin on a fully tax
    equivalent basis to net interest margin for the periods presented:
  Mitchell
    Feiger, Chief Executive Officer and President Jill E. York, Vice President
    and Chief Financial Officer May 20, 2008 NASDAQ: MBFI Investor Presentation
  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 20th day of May, 2008.
  MB FINANCIAL, INC.
  By:
  /s/ Jill E. York
  Jill E. York
  Vice President
    and Chief Financial Officer
  (Principal
    Financial and Principal Accounting Officer)