Exhibit 99.4

As disclosed in FB Financial Corporation’s (“FB Financial” or the “Company”) Current Report on Form 8-K filed on August 1, 2017 (the “Current Report”), FirstBank, the wholly-owned banking subsidiary of FB Financial, completed the acquisition (the “Acquisition”) of all of the issued and outstanding shares of the Clayton Banks (defined below), as contemplated by that certain Stock Purchase Agreement, dated February 8, 2017 and as amended on May 26, 2017 (the “Stock Purchase Agreement”), by and among FB Financial, FirstBank, Clayton HC, Inc., a Tennessee Corporation (“Clayton HC”), Clayton Bank and Trust, a Tennessee state bank and wholly-owned subsidiary of Clayton HC (“CBT”), American City Bank, a Tennessee state bank and wholly-owned subsidiary of Clayton HC (“ACB,” and together with CBT, the “Clayton Banks”), and James L. Clayton, the primary shareholder of Clayton HC (“Clayton”). Following the completion of the Acquisition, the Clayton Banks were merged with and into FirstBank, with FirstBank continuing as the surviving banking corporation.

Unaudited pro forma financial information

The following unaudited pro forma combined financial information is presented to illustrate the estimated effects of the Acquisition, based on the historical financial statements and accounting records of FB Financial and the Clayton Banks after giving effect to the Acquisition and the acquisition-related pro forma adjustments as described in the notes below.

The unaudited pro forma condensed combined balance sheet combines the historical consolidated and combined balance sheets of FB Financial and the Clayton Banks, giving effect to the Acquisition as if it had been consummated on March 31, 2017. The unaudited pro forma condensed combined statements of income for the three months ended March 31, 2017 and for year ended December 31, 2016 combine the historical consolidated and combined statements of income of FB Financial and the Clayton Banks, giving effect to the Acquisition as if it had been consummated on January 1, 2016, the beginning of the earliest period presented. The historical combined financial statements of Clayton Banks have been adjusted to reflect certain reclassifications in order to conform with FB Financial’s financial statement presentation.

The unaudited pro forma condensed combined financial statements were prepared using the acquisition method of accounting for business combinations pursuant to the provisions of Accounting Standards Codification (“ASC”) Topic 805, Business Combinations (“ASC 805”), with FirstBank the acquirer of the Clayton Banks for accounting purposes. Accordingly, consideration given by FirstBank to complete the Acquisition will be allocated to the assets and liabilities of the Clayton Banks based upon their estimated fair values as of the date of completion of the Acquisition. As of the date of this prospectus, FB Financial has not completed the detailed valuation studies necessary to arrive at the required estimates of the fair value of the Clayton Banks assets to be acquired and the liabilities to be assumed and the related allocations of the acquisition consideration, nor has it identified all adjustments necessary to conform the accounting policies of the Clayton Banks to FB Financial’s accounting policies. A final determination of the fair value of the assets and liabilities of the Clayton Banks will be based on the actual net tangible and intangible assets and liabilities of the Clayton Banks that exist as of the date of completion of the Acquisition and therefore cannot be made prior to the completion of the transaction. Accordingly, the pro forma purchase price allocation and adjustments are preliminary and are subject to further adjustments as additional information becomes available and as additional analyses are performed. The preliminary pro forma purchase price allocation and adjustments have been made solely for the purpose of providing the unaudited pro forma combined financial statements presented below. FB Financial estimated the fair value of the assets and liabilities of the Clayton Banks based on discussions with management of the Clayton Banks, preliminary valuation studies and due diligence. Upon completion of the Acquisition, final valuations will be performed. Increases or decreases in the fair value of relevant balance sheet amounts will result in adjustments to the balance sheet and/or statements of income until the allocation of acquisition consideration is finalized. There can be no assurance that such finalization will not result in material changes.

These unaudited pro forma combined financial statements have been developed from and should be read in conjunction with (i) the unaudited interim consolidated and combined financial statements of each of FB Financial and the Clayton Banks for the quarterly period ended March 31, 2017 contained, with respect to FB Financial, in FB Financial’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2017 and, with respect to the Clayton Banks, as exhibit 99.3 to the Current Report and (ii) the audited consolidated and combined financial statements of each of FB Financial and the Clayton Banks for the year ended December 31, 2016 contained, with respect to FB Financial, in FB Financial’s Annual Report on Form 10-K for the year ended December 31, 2016 and, with respect to the Clayton Banks, as exhibit 99.2 to the Current Report. The unaudited pro forma combined financial statements are provided for illustrative purposes only and do not purport to represent what the actual combined results of operations or the combined financial position of FB Financial would have been had the Acquisition occurred on the dates assumed, nor are they necessarily indicative of future consolidated results of operations or consolidated financial position.

Pro forma adjustments are included only to the extent they are (i) directly attributable to the Acquisition, (ii) factually supportable and (iii) with respect to the unaudited pro forma combined statement of income, expected to have a continuing impact on the combined results. FB Financial expects to incur significant costs associated with integrating the operations of the Clayton Banks. The unaudited pro forma combined financial statements do not reflect the costs of any integration activities or benefits that may result from realization of future cost savings from operating efficiencies or revenue synergies expected to result from the Acquisition.

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FB Financial Corporation and subsidiaries

Unaudited Pro Forma Condensed Combined Balance Sheet

(in thousands)

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FB Financial Corporation and subsidiaries

Unaudited Pro Forma Condensed Combined Statement of Income

(in thousands, except share data)

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FB Financial Corporation and subsidiaries

Unaudited Pro Forma Condensed Combined Statement of Income

(in thousands, except share data)

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Note 1. Basis of Presentation

The unaudited pro forma condensed combined balance sheet as of March 31, 2017 and the unaudited pro forma condensed combined income statement for the three months ended March 31, 2017 and year ended December 31, 2016 are based on the historical financial statements of FB Financial Corporation and the combined Clayton Banks after giving effect to the completion of the Acquisition and the assumptions and adjustments described in the accompanying notes. The statements of income gives effect to the transaction at January 1, 2016. Such financial statements do not include estimated cost savings, revenue synergies expected to result from the Acquisition, or the costs to achieve these cost savings or revenue synergies, or any anticipated disposition of assets that may result from the integration of operations.

The transaction will be accounted for under the acquisition method of accounting in accordance with Accounting Standards Codification (“ASC”) Topic 805, Business Combinations (“ASC 805”). In business combination transactions in which the consideration given is not in the form of cash (that is, in the form of non-cash assets, liabilities incurred, or equity interests issued), measurement of the acquisition consideration is based on the fair value of the consideration given or the fair value of the asset (or net assets) acquired, whichever is more clearly evident and, thus, a more reliable measure.

Under ASC 805, all of the assets acquired and liabilities assumed in a business combination are recognized at their acquisition-date fair value, while transaction costs and restructuring costs associated with the business combination are expensed as incurred. The excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed, if any, is allocated to goodwill. For income tax purposes, the Acquisition will be treated as an asset purchase. As an asset purchase for income tax purposes, the carrying value of assets and liabilities for the Clayton Banks are the same for both financial reporting and income tax purposes; therefore no deferred taxes will be recorded at the date of the acquisition. Subsequent to the completion of the Acquisition, FB Financial Corporation will finalize an integration plan, which may affect how the assets acquired, including intangible assets, will be utilized by the combined company. For those assets in the combined company that will be phased out or disposed of, additional amortization, depreciation and possibly impairment charges will be recorded after management completes the integration plan.

The unaudited pro forma financial information has been compiled in a manner consistent with the accounting policies adopted by FB Financial. Certain balances from the consolidated financial statements of the Clayton Banks were reclassified to conform presentation to that of FB Financial Corporation.

The unaudited pro forma information is presented solely for information purposes and is not necessarily indicative of the combined results of operations or financial position that might have been achieved for the period, nor is it necessarily indicative of the future results of the combined company.

Note 2. Preliminary Estimated Allocation of Purchase Price

Under the acquisition method of accounting, the total acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of the combined Clayton banks based on the estimated fair values as of the closing of the Acquisition. The excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed, if any, is allocated to goodwill.

The allocation of the estimated acquisition consideration with regard to the combined Clayton banks is preliminary. The preliminary allocation is based on estimates, assumptions, valuations, and other studies which have not progressed to a stage where there is sufficient information to make a definitive allocation. Accordingly, the acquisition consideration allocation unaudited pro forma adjustments will remain preliminary until FB Financial Corporation management determines the fair values of assets acquired and liabilities assumed. The final determination of the acquisition

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consideration allocation is anticipated to be completed as soon as practicable after the completion of the Acquisition and will be based on the value of the FB Financial Corporation common stock in accordance with the Purchase Agreement. The final amounts allocated to assets acquired and liabilities assumed could differ significantly from the amounts presented in the unaudited pro forma combined consolidated financial statements.

The following table shows a preliminary pro forma allocation of purchase price to net assets acquired and the pro forma goodwill generated from the transaction.

Pro Forma Allocations of Purchase Price

(in thousands, except share data)

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Note 3. Unaudited Pro Forma Adjustments

The following pro forma adjustments have been reflected in the unaudited pro forma condensed combined financial information for the announced acquisition of the combined Clayton Banks. All adjustments are based on current valuations and assumptions which are subject to change.

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