EXHIBIT 99.4

UNAUDITED PRO FORMA COMBINED CONDENSED
  CONSOLIDATED FINANCIAL INFORMATION

The following is the unaudited pro forma combined condensed consolidated financial information for MB Financial, Inc. (“MB Financial”) and American Chartered Bancorp, Inc. (“American Chartered”), giving effect to the merger of American Chartered with and into MB Financial. The unaudited pro forma combined condensed consolidated balance sheet as of June 30, 2016 gives effect to the merger as if it occurred on that date.  The unaudited pro forma combined condensed consolidated statements of operations for the six months ended June 30, 2016 and the year ended December 31, 2015 give effect to the merger as if it occurred on January 1, 2015.  The actual completion date of the merger was August 24, 2016.

The unaudited pro forma combined condensed consolidated financial statements have been prepared using the acquisition method of accounting for business combinations under GAAP. MB Financial is the acquirer for accounting purposes. Certain immaterial reclassifications have been made to the historical financial statements of American Chartered to conform to the presentation in MB Financial’s financial statements.

Based on the closing price of the acquisition, consideration paid by MB Financial was $487.4 million, including $382.8 million in common stock (9.7 million shares), $102.3 million in cash and $2.3 million in preferred stock and stock-based awards assumed.  Fair value adjustments and amounts preliminarily allocated to goodwill and identifiable intangibles could change significantly from those allocations used in the unaudited pro forma combined condensed consolidated financial statements presented herein and could result in a material change in amortization or accretion of the fair value adjustments on acquired assets and assumed liabilities.

In connection with the plan to integrate the operations of MB Financial and American Chartered following the completion of the merger, MB Financial anticipates that nonrecurring charges, such as costs associated with systems implementation, severance and other costs related to exit or disposal activities, will be incurred.  The unaudited pro forma combined condensed consolidated statements of operations do not include the effects of the non-recurring costs associated with any restructuring or integration activities resulting from the merger, as they are nonrecurring in nature. Additionally, the unaudited pro forma adjustments do not give effect to any nonrecurring or unusual restructuring charges that may be incurred as a result of the integration of the two companies or any anticipated disposition of assets that may result from such integration.

The actual amounts recorded as of the completion of the merger may differ materially from the information presented in these unaudited pro forma combined condensed consolidated financial statements as a result of:

·                  capital used or generated in American Chartered’s operations between the signing of the merger agreement and completion of the merger;

·                  changes in the fair values of American Chartered’s assets and liabilities;

·                  other changes in American Chartered’s net assets that occurred prior to the completion of the merger, which could cause material changes in the information presented below; and

·                  the actual financial results of the combined company.

The unaudited pro forma combined condensed consolidated financial statements are provided for informational purposes only.  The unaudited pro forma combined condensed consolidated financial statements are not necessarily, and should not be assumed to be, an indication of the results that would have been achieved had the transaction been completed as of the dates indicated or that may be achieved in the future.  The preparation of the unaudited pro forma combined condensed consolidated financial statements and related adjustments required management to make certain assumptions and estimates.  The unaudited pro forma combined condensed consolidated financial information is based on, and should be read together with,

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the historical consolidated financial statements and related notes of MB Financial contained in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2016 and its Annual Report on Form 10-K for the year ended December 31, 2015, and of American Chartered for the six months ended June 30, 2016 and for the year ended December 31, 2015 included in this Form 8-K/A filing as Exhibits 99.3 and 99.2, respectively.

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MB FINANCIAL, INC. AND AMERICAN CHARTERED BANCORP, INC.

UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED BALANCE SHEET

As of June 30, 2016

(In thousands)

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MB FINANCIAL, INC. AND AMERICAN CHARTERED BANCORP, INC.

UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS

For the Six Months Ended June 30, 2016

(In thousands, except share and per share data)

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MB FINANCIAL, INC. AND AMERICAN CHARTERED BANCORP, INC.

UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS

For the Year Ended December 31, 2015

(In thousands, except share and per share data)

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Notes to Unaudited Pro Forma Combined Condensed Consolidated Financial Statements

Note 1 — Basis of Presentation

The unaudited pro forma combined condensed consolidated financial information has been prepared under the acquisition method of accounting for business combinations. The unaudited pro forma combined condensed consolidated statements of operations for the year ended December 31, 2015 and six months ended June 30, 2016, are presented as if the acquisition occurred on January 1, 2015. The unaudited pro forma combined condensed consolidated balance sheet as of June 30, 2016 is presented as if the acquisition occurred as of that date. This information is not intended to reflect the actual results that would have been achieved had the acquisition actually occurred on those dates. The pro forma adjustments are preliminary, based on estimates, and are subject to change as more information becomes available and after final analyses of the fair values of both tangible and intangible assets acquired and liabilities assumed are completed. Accordingly, the final fair value adjustments may be materially different from those presented in this document.

Certain historical data of American Chartered has been reclassified on a pro forma basis to conform to MB Financial’s classifications.

Note 2 — Purchase Price

At the effective time of the merger, (i) each share of the common stock, no par value, of American Chartered (“American Chartered Common Stock”) that was issued and outstanding immediately prior to the effective time, (ii) each share of American Chartered’s 8% Cumulative Voting Convertible Preferred Stock, Series D (“American Chartered Series D Preferred Stock”), that was issued and outstanding immediately prior to the effective time whose holder elected pursuant to American Chartered’s charter to receive the same consideration in the merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which such share of American Chartered Series D Preferred Stock would otherwise then be convertible, and (iii) each share of American Chartered Non-Voting Perpetual Preferred Stock, Series F, that was issued and outstanding immediately prior to the effective time, was converted into the right to receive, subject to the election and proration procedures set forth in the merger agreement:  (1) cash in the amount of $9.30 (the “Cash Consideration”) or (2) 0.2732 shares of MB Financial’s common stock, with cash paid in lieu of fractional MB Financial shares determined by multiplying the fractional MB Financial share amount by $39.01(average closing sale price of MB Financial’s common stock for the five full trading days ending on August 23, 2016) (the “Stock Consideration”).  The holders of such shares of American Chartered stock also could elect to receive a combination of the cash consideration and the stock consideration for their shares.  Each share of American Chartered Series D Preferred Stock whose holder did not elect to receive the same consideration in the merger as holders of American Chartered Common Stock, based on the number of shares of American Chartered Common Stock into which such share of American Chartered Series D Preferred Stock would otherwise then be convertible, converted into the right to receive one share of MB Financial’s 8% Cumulative Voting Convertible Preferred Stock, Series B.

MB Financial issued approximately 9.7 million shares of common stock in the merger, resulting in approximately 83.5 million shares of MB Financial common stock outstanding after the merger.

Note 3 — Allocation of Purchase Price of American Chartered

Under the acquisition method of accounting, American Chartered’s assets and liabilities and any identifiable intangible assets are required to be adjusted to their estimated fair values. The excess of the purchase price over the fair value of the net assets acquired, net of deferred taxes, is allocated to goodwill. Estimated fair value adjustments included in the pro forma financial statements are based upon available information, and certain assumptions considered reasonable, and may be revised as additional information becomes available.  The following are the pro forma adjustments made to record the transaction and to adjust American Chartered’s assets and liabilities to their estimated fair values at June 30, 2016.

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All of the other asset and liability categories are either variable rate or short-term in nature and fair value adjustments were considered to be immaterial to the financial presentation.  The purchase price adjustments are subject to further refinement, including the determination of a core deposit intangible and its life for amortization purposes.

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The following pro forma adjustments are reflected in the unaudited pro forma condensed combined consolidated financial information:

A.            Cash portion of the purchase price to be paid in the amount of $102.3 million.

B.            Fair value adjustment on held-to-maturity investment securities to be accreted using the 150% declining balance method over a five-year weighted average remaining life of the investment securities. This interest rate fair value adjustment was determined based on quoted prices for similar investment securities or other observable market data.

C.            Fair value adjustment on loans which includes a $4.3 million discount to adjust for credit deterioration of the acquired portfolio and a $29.8 million discount to reflect current interest rates and spreads to be accreted using the straight line method over a 10-year weighted average remaining life of the acquired portfolio. The interest rate fair value adjustment was determined based on the present value of estimated future cash flows of the loans to be acquired, discounted using a weighted average market rate. The credit fair value adjustment was determined based on assigned risk ratings and the present value of estimated expected cash flows (including the estimated fair value of loan collateral).

D.            Elimination of American Chartered’s allowance for loan losses.

E.             Estimate of goodwill. See the purchase price allocation above for calculation.

F.              Estimate of core deposit intangible asset to be amortized using the 150% declining balance method over a 15-year useful life. This asset was determined based on the present value of the estimated future cash flows of core deposits discounted using a weighted average market rate.

G.            Fair value adjustment on premises and equipment of $8.2 million to be amortized using the straight line method over a 19-year remaining life of the premises and equipment.  Also includes a fair value adjustment on land of $3.2 million.

H.           Fair value adjustment on interest bearing deposits to be amortized using the 150% declining balance method over a five-year weighted average remaining life of the deposits.

I.                Fair value adjustments on the junior subordinated notes issued to capital trusts to be accreted using the straight line method over the 18-year remaining maturity.

J.                Liability due to unfavorable operating lease terms relative to market terms to be accreted using the straight line method over the 26-year weighted average remaining terms.  Also includes net deferred tax asset based on the fair value adjustments that are not tax deductible using a tax rate of 40% as well as an accrual for estimated transaction costs, primarily professional fees, of $5,260, net of tax.

K.            Elimination of American Chartered’s stockholders’ equity and the issuance of MB Financial shares in the merger. It is assumed that none of the outstanding shares of American Chartered Series D preferred stock are converted into American Chartered common stock prior to the merger or converted into the right to receive the same consideration in the merger as the holders of American Chartered common stock, and that shares of MB Financial preferred stock are issued. The fair value of the MB Financial preferred stock was estimated as if it were converted into MB Financial common stock. Also includes a decrease in retained earnings for estimated transaction costs, primarily professional fees, of $5,260, net of tax.

L.             See Note 4 for the estimated amortization/accretion adjustments included in the pro forma combined condensed consolidated statements of operations.

M.         Taxes were adjusted for pro forma purposes at a 40% rate for statements of operations adjustments.

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N.            Elimination of American Chartered’s dividends on preferred stock and addition of MB Financial’s dividends on newly issued preferred stock in connection with the merger.

O.            Shares assumed to be issued by MB Financial in the merger.

Not included in the pro forma statements is provision related to the acquired loans.   We anticipate recording a provision for the acquired portfolio in future periods related to renewing American Chartered loans, which is expected to largely offset the accretion from non-purchase credit impaired loans.

Note 4 — Estimated Amortization/Accretion of Acquisition Accounting Adjustments

For purposes of determining the pro forma effect of the merger on the statements of operations, the following pro forma adjustments have been made as if the acquisition occurred as of January 1, 2015 (in thousands):

(1) Includes accretion for interest rate market value adjustment.

The following table presents the estimated amortization (accretion) of the acquisition accounting adjustments reflected in the unaudited pro forma combined condensed consolidated financial information on the future pre-tax net income of MB Financial after the merger with American Chartered as if the acquisition occurred as of January 1, 2015 (in thousands):

(1) Includes accretion for interest rate market value adjustment.

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As noted above, not included in the pro forma statements is provision related to the acquired loans.   We anticipate recording a provision for the acquired portfolio in future periods related to renewing American Charted loans, which is expected to largely offset the accretion from non-purchase credit impaired loans.

Note 5 — Merger Costs of American Chartered

The table below reflects MB Financial’s current estimate of the aggregate merger costs of $18.8 million (net of $10.7 million of taxes, computed using the combined federal and state tax rate of 40%) expected to be incurred in connection with the merger, which are excluded from the pro forma financial statements. While a portion of these costs may be required to be recognized over time, the current estimate of these costs, primarily comprised of anticipated cash charges, include the following (in thousands):

(1)  A portion of this amount is not tax deductible.

MB Financial’s cost estimates are forward-looking. While the costs represent MB Financial’s current estimate of merger costs associated with the merger that will be incurred, the ultimate level and timing of recognition of these costs will be based on the final integration following consummation of the merger. Readers are cautioned that the completion of this integration and other actions that may be taken in connection with the merger will impact these estimates. The type and amount of actual costs incurred could vary materially from these estimates if future developments differ from the underlying assumptions used by management in determining the current estimate of these costs.

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