SUMMARY

This summary highlights information contained elsewhere in this joint proxy statement/prospectus and may not contain all of the information that is important to you. We urge you to carefully read the entire joint proxy statement/prospectus and the other documents to which we refer in order to fully understand the merger and the related transactions. See “Where You Can Find More Information.” Each item in this summary refers to the page of this joint proxy statement/prospectus on which that subject is discussed in more detail.

Information about the Parties

Mid Penn Bancorp, Inc.

Mid Penn is a Pennsylvania business corporation and bank holding company with its headquarters in Millersburg, Pennsylvania. At March 31, 2018, Mid Penn had total consolidated assets of $1.4 billion. Mid Penn is the parent company of Mid Penn Bank, serving the community since 1868, which operates twenty-nine retail banking offices across eight counties in Pennsylvania.

Upon the closing of the merger of The Scottdale Bank & Trust Co., or Scottdale, with and into Mid Penn Bank, which occurred on January 8, 2018, Mid Penn Bank assumed all of the assets of Scottdale. As of December 31, 2017, Scottdale had approximately $261 million in total assets and total deposits of approximately $211 million, based upon Scottdale’s December 31, 2017 Call Report filed with the FDIC.

The principal executive offices of Mid Penn are located at 349 Union Street, Millersburg, Pennsylvania 17061 and its telephone number is (717) 692-2133.

Mid Penn common stock is traded on The Nasdaq Global Select Market under the symbol “MPB.”

First Priority Financial Corp.

First Priority is a Pennsylvania business corporation and bank holding company with its headquarters in Malvern, Pennsylvania. At March 31, 2018, First Priority had total consolidated assets of $614.6 million. First Priority is the parent company of First Priority Bank, which operates eight retail banking offices in four counties in Pennsylvania.

The principal executive offices of First Priority are located at 2 West Liberty Boulevard, Suite 104, Malvern, Pennsylvania 19355, and its telephone number is (610) 280-7100.

First Priority common stock is traded on the OTCQX Market under the symbol “FPBK.”

The Merger and the Merger Agreement (page 76)

The terms and conditions of the merger are contained in the merger agreement, which is attached as Annex A to this joint proxy statement/prospectus and incorporated by reference herein. Please carefully read the merger agreement as it is the legal document that governs the merger.

Pursuant to the merger agreement, First Priority will merge with and into Mid Penn with Mid Penn as the surviving corporation. Immediately after the corporate merger, First Priority Bank will merge with and into Mid Penn Bank, with Mid Penn Bank as the surviving bank.

Following the completion of the merger, the merger agreement provides that Mid Penn will continue to operate the branches of First Priority Bank as a separate banking division of Mid Penn Bank under the name “First Priority Bank, a Division of Mid Penn Bank.”

Mid Penn Will Hold Its Special Meeting on July 25, 2018 (page 90)

The Mid Penn special meeting will be held on July 25, 2018 at 2:00 p.m., local time, at Mid Penn Bank, 349 Union Street, Millersburg, Pennsylvania 17061. At the special meeting, Mid Penn shareholders will be asked to:

Record Date. Only holders of record of Mid Penn common stock at the close of business on June 14, 2018 will be entitled to vote at the special meeting. Each share of Mid Penn common stock is entitled to one vote. As of the Mid Penn record date, there were 6,122,717 shares of Mid Penn common stock issued and outstanding and entitled to vote at the special meeting.

Required Vote. The affirmative vote, in person or by proxy, of at least sixty-six and two thirds percent (66 2/3%) of the outstanding shares of Mid Penn common stock is required to approve the merger agreement, and a majority of the votes cast at the special meeting is required to approve the proposal to adjourn the Mid Penn special meeting, if necessary, to solicit additional proxies. The presence, in person or by proxy, of a majority of the outstanding shares of Mid Penn common stock is necessary to constitute a quorum in order to transact business at the special meeting.

As of the record date, directors, executive officers and ten percent (10%) shareholders of Mid Penn and their affiliates had the right to vote 1,382,836 shares of Mid Penn common stock, or 22.6% of the outstanding Mid Penn common stock entitled to be voted at the special meeting. Each of the directors, executive officers and ten percent (10%) shareholders of Mid Penn has agreed to vote all shares of Mid Penn common stock owned by him, her or it in favor of adoption of the merger agreement and the transactions contemplated thereby.

First Priority Will Hold Its Special Meeting on July 24, 2018 (page 95)

The First Priority special meeting will be held on July 24, 2018 at 9:30 a.m., local time, at The Desmond Hotel, 1 Liberty Boulevard, Malvern, Pennsylvania 19355. At the special meeting, First Priority shareholders will be asked to:

Record Date. Only holders of record of First Priority common stock at the close of business on June 14, 2018 will be entitled to vote at the special meeting. Each share of First Priority common stock is entitled to one vote. As of the First Priority record date, there were 6,650,396 shares of First Priority common stock issued and outstanding and entitled to vote at the special meeting.

Required Vote. The affirmative vote, in person or by proxy, of a majority of votes cast is required to approve the merger agreement and the proposal to adjourn the First Priority special meeting, if necessary, to solicit additional proxies.

As of the record date, directors and executive officers of First Priority and their affiliates had the right to vote 1,337,196 shares of First Priority common stock, or approximately 20% of the outstanding First Priority common stock entitled to be voted at the special meeting. Each of the directors and the executive officers of First Priority has agreed to vote all shares of First Priority common stock owned by him or her in favor of adoption of the merger agreement.

First Priority Shareholders Will Receive Shares of Mid Penn Common Stock in the Merger (page 76).

Upon completion of the merger, each outstanding share of First Priority common stock outstanding immediately prior to the effective time of the merger, will be converted into the right to receive 0.3481 shares of Mid Penn common stock, which we refer to as the “merger consideration.” The exchange ratio is fixed and not subject to adjustment, except in limited circumstances.

On January 12, 2018, which was the last trading date preceding the public announcement of the proposed merger, the closing price of Mid Penn common stock was $37.50 per share. On June 14, 2018, the most recent practicable trading day prior to the printing of this joint proxy statement/prospectus, the closing price of Mid Penn common stock was $34.90 per share. The market price of both Mid Penn common stock and First Priority common stock will fluctuate before the completion of the merger; therefore, you are urged to obtain current market quotations for Mid Penn common stock and First Priority common stock. The value of the merger consideration will fluctuate as the market price of Mid Penn common stock fluctuates before the completion of the merger. The market price of Mid Penn common stock at closing will not be known at the time of the First Priority special meeting and may be more or less than the current price of Mid Penn common stock or the price of Mid Penn common stock at the time of the First Priority special meeting or at the effective time of the merger.

Expected Material United States Federal Income Tax Treatment as a Result of the Merger (page 88)

The merger is structured to be treated as a reorganization for United States federal income tax purposes. Each of Mid Penn and First Priority has conditioned the consummation of the merger on its receipt of a legal opinion that this will be the case. Because First Priority shareholders will receive solely Mid Penn common stock for their shares (except for cash in lieu of fractional shares), First Priority shareholders should not recognize gain or loss except with respect to the cash they receive instead of a fractional share.

This tax treatment may not apply to all First Priority shareholders. Determining the actual tax consequences of the merger to First Priority shareholders can be complicated. First Priority shareholders should consult their own tax advisor for a full understanding of the merger’s tax consequences that are particular to each shareholder.

Exceptions to these conclusions or other considerations may apply, some of which are discussed beginning on page 88. Determining the actual tax consequences of the merger to a First Priority shareholder can be complicated. For further information, please refer to “Material United States Federal Income Tax Consequences of the Merger” on page 88. First Priority shareholders should also consult their own tax advisors for a full understanding of the federal income tax and other tax consequences of the merger as they apply specifically to them.

Accounting Treatment of the Merger (page 87)

The merger will be treated as a “business combination” using the acquisition method of accounting with Mid Penn treated as the acquiror under accounting principles generally accepted in the United States of America, or “US GAAP.”

Market Prices and Share Information (page 161)

Mid Penn common stock is listed on The Nasdaq Global Select Market under the symbol “MPB.” First Priority common stock is quoted on the OTCQX Market under the symbol “FPBK.”

The table below shows the last sale price of Mid Penn common stock and First Priority common stock, and the value of Mid Penn common stock received per share of First Priority common stock based upon the exchange

ratio, on January 12, 2018 (the last full trading day prior to announcement of the execution of the merger agreement) and June 14, 2018 (the latest practicable trading day prior to the date of these materials).

Because the exchange ratio is fixed and will be adjusted only in limited circumstances, including if Mid Penn declares any stock dividends or effects a stock split or reverse stock split, and the market price of Mid Penn common stock will fluctuate prior to the merger, the pro forma equivalent price per share of First Priority common stock will also fluctuate prior to the merger. First Priority shareholders will not know the final equivalent price per share of First Priority common stock when they vote on the merger. This information relates to the value of shares of First Priority common stock that will be converted into shares of Mid Penn common stock in the merger. You should obtain current stock price quotations for the shares.

Following completion of the merger, current Mid Penn shareholders will own in the aggregate approximately 72.6% of the outstanding shares of Mid Penn common stock and First Priority shareholders will own approximately 27.4% of the outstanding shares of Mid Penn common stock.

Opinion of First Priority’s Financial Advisor (page 48)

At the January 16, 2018 meeting at which the First Priority board of directors considered and approved the merger agreement, First Priority’s financial advisor, Griffin Financial Group LLC, or Griffin, delivered its oral opinion to First Priority’s board of directors, which was subsequently confirmed in writing, to the effect that, as of January 16, 2018, subject to the procedures followed, assumptions made, matters considered and qualifications and limitations described in Griffin’s opinion, the merger consideration was fair, from a financial point of view, to First Priority common equity shareholders.

The full text of Griffin’s opinion is attached as Annex B to this joint proxy statement/prospectus. The opinion outlines the procedures followed, assumptions made, matters considered and qualifications and limitations on the review undertaken by Griffin in rendering its opinion.

First Priority shareholders should read the opinion and the summary description of Griffin’s opinion contained in this joint proxy statement/prospectus carefully in their entirety.

Griffin’s opinion speaks only as of the date of the opinion. The opinion of Griffin does not reflect any developments that may have occurred or may occur after the date of its opinion and prior to the completion of the merger. First Priority does not expect that it will request an updated opinion from Griffin. The opinion was directed to First Priority’s board of directors in connection with its consideration of the merger and is directed only as to the fairness, from a financial point of view, of the merger consideration to First Priority common equity shareholders. Griffin’s opinion does not constitute a recommendation to any First Priority shareholder as to how such shareholder should vote at any meeting of shareholders called to consider and vote upon the First Priority merger proposal. Griffin’s opinion does not address the underlying business decision of First Priority to engage in the merger, the form or structure of the merger, the relative merits of the merger as compared to any other alternative business strategies that might exist for First Priority or the effect of any other transaction in which First Priority might engage. Griffin did not express any opinion as to the fairness of the amount or nature of the compensation

to be received in the merger by First Priority’s officers, directors, or employees, or class of such persons, if any, relative to the compensation to be received in the merger by any other shareholder of First Priority.

For further information, see “The Merger—Opinion of First Priority’s Financial Advisor.”

Opinion of Mid Penn’s Financial Advisor (page 59)

At the January 16, 2018 meeting at which the Mid Penn board of directors considered and approved the merger agreement, Mid Penn’s financial advisor, Sandler O’Neill & Partners, L.P., or Sandler, delivered its oral opinion to Mid Penn’s board of directors, which was subsequently confirmed in writing, to the effect that, as of January 16, 2018, subject to the procedures followed, assumptions made, matters considered and qualifications and limitations described in Sandler’s opinion, the merger consideration was fair, from a financial point of view, to Mid Penn.

The full text of Sandler’s opinion is attached as Annex C to this joint proxy statement/prospectus. The opinion outlines the procedures followed, assumptions made, matters considered and qualifications and limitations on the review undertaken by Sandler in rendering its opinion.

Mid Penn shareholders should read the opinion and the summary description of Sandler’s opinion contained in this joint proxy statement/prospectus carefully in their entirety.

Sandler’s opinion speaks only as of the date of the opinion. The opinion of Sandler does not reflect any developments that may have occurred or may occur after the date of its opinion and prior to the completion of the merger. Mid Penn does not expect that it will request an updated opinion from Sandler. The opinion was directed to Mid Penn’s board of directors in connection with its consideration of the merger and is directed only as to the fairness, from a financial point of view, of the merger consideration to Mid Penn. Sandler’s opinion does not constitute a recommendation to any Mid Penn shareholder as to how such shareholder should vote at any meeting of shareholders called to consider and vote upon the Mid Penn merger proposal. Sandler’s opinion does not address the underlying business decision of Mid Penn to engage in the merger, the form or structure of the merger, the relative merits of the merger as compared to any other alternative business strategies that might exist for Mid Penn or the effect of any other transaction in which Mid Penn might engage. Sandler did not express any opinion as to the fairness of the amount or nature of the compensation to be received in the merger by Mid Penn’s officers, directors, or employees, or class of such persons, if any, relative to the compensation to be received in the merger by any other shareholder of Mid Penn.

For further information, see “The Merger—Opinion of Mid Penn’s Financial Advisor.”

Board of Directors and Executive Officers of Mid Penn after the Merger (page 71)

Following completion of the merger, the then current directors and executive officers of Mid Penn and Mid Penn Bank will continue in office. At the effective time of the merger, the boards of directors of Mid Penn and Mid Penn Bank will be increased by four (4) directors. David E. Sparks, Chairman and Chief Executive Officer of First Priority, and three (3) of the other current directors of First Priority selected by the board of directors of First Priority, with the approval of Mid Penn’s board of directors, will be added to the boards of directors of Mid Penn and Mid Penn Bank. Additionally, Mr. Sparks will be appointed as Chief Strategic Advisor to the Chief Executive Officer of Mid Penn Bancorp, Inc. and Mid Penn Bank, and Market President of First Priority Bank, a Division of Mid Penn Bank.

The Mid Penn Board of Directors Recommends That Mid Penn Shareholders Vote “FOR” Approval and Adoption of the Agreement and Plan of Merger (page 59)

The Mid Penn board of directors believes that the merger is in the best interests of Mid Penn and has unanimously approved the merger and the merger agreement. The Mid Penn board of directors recommends that Mid Penn shareholders vote “FOR” approval and adoption of the agreement and plan of merger. The Mid Penn board also recommends that its shareholders vote “FOR” the proposal to adjourn the special meeting, if necessary, to solicit additional proxies.

The First Priority Board of Directors Recommends That First Priority Shareholders Vote “FOR” Approval and Adoption of the Agreement and Plan of Merger (page 48)

The First Priority board of directors believes that the merger is in the best interests of First Priority and has unanimously approved the merger and the merger agreement. The First Priority board of directors recommends that First Priority shareholders vote “FOR” approval and adoption of the agreement and plan of merger. The First Priority board also recommends that its shareholders vote “FOR” the proposal to adjourn the special meeting, if necessary, to solicit additional proxies.

First Priority’s Directors and Executive Officers Have Financial Interests in the Merger that May Differ from the Interests of First Priority Shareholders (page 74)

In addition to their interests as First Priority shareholders, the directors and certain executive officers of First Priority have interests in the merger that are different from or in addition to interests of other First Priority shareholders. For purposes of the relevant First Priority agreements and plans, the completion of the merger will constitute a change in control. These additional interests may create potential conflicts of interest and cause some of these persons to view the proposed transaction differently than a First Priority shareholder may view it. The financial interests of First Priority’s directors and executive officers in the merger include the following:

First Priority’s board of directors was aware of these interests and took them into account in its decision to approve the agreement and plan of merger. For information concerning these interests, please see the discussion on page 74 under the caption “Interests of First Priority’s Directors and Executive Officers in the Merger.” For more information concerning the closing conditions of the merger, please see the discussion on page 78 under the caption “The Merger Agreement—Covenants and Agreements.”

First Priority Shareholders’ Dissenters Rights to Appraisal Rights (page 71)

Shareholders of First Priority will have appraisal or dissenters’ rights in connection with the merger. See “First Priority Shareholders Have Dissenters’ Rights in the Merger” beginning on page 71.

The Rights of First Priority Shareholders Will Change After the Merger (page 152)

The rights of First Priority shareholders will change as a result of the merger due to differences in Mid Penn’s and First Priority’s governing documents. The rights of First Priority’s shareholders are governed under Pennsylvania law and by First Priority’s articles of incorporation and bylaws. Upon completion of the merger, First Priority shareholders will be governed under Pennsylvania law and by Mid Penn’s articles of incorporation and bylaws. A description of shareholder rights under each of the Mid Penn and First Priority governing documents, and the material differences between them, is included in the section entitled “Comparison of Shareholders’ Rights” found on page 152.

Conditions That Must Be Satisfied or Waived for the Merger to Occur (page 85)

Currently, we expect to complete the merger in the third quarter of 2018. In addition to the approval of the merger proposal by the requisite vote of Mid Penn and First Priority shareholders and the receipt of all required regulatory approvals and expiration or termination of all statutory waiting periods in respect thereof, each as described herein, each party’s obligation to complete the merger is also subject to the satisfaction or waiver (to the extent permitted under applicable law) of certain other conditions, including the effectiveness of the registration statement containing this joint proxy statement/prospectus, approval of the listing on the Nasdaq Stock Market of the Mid Penn common stock to be issued in the merger, the absence of any applicable law or order prohibiting the merger, the accuracy of the representations and warranties of the other party under the merger agreement (subject to the materiality standards set forth in the merger agreement), the performance by the other party of its respective obligations under the merger agreement in all material respects, delivery of officer certificates by the other party certifying satisfaction of the two preceding conditions and each of Mid Penn’s and First Priority’s receipt of a tax opinion to the effect that the merger will be treated as a “reorganization” within the meaning of Section 368(a) of the Code.

Neither First Priority nor Mid Penn can be certain when, or if, the conditions to the merger will be satisfied or waived, or that the merger will be completed.

No Solicitation of Other Offers (page 82)

First Priority has agreed that it will not, and First Priority will cause its subsidiaries and each of their respective officers, directors, employees, representatives, agents, and affiliates not to, between the date of the merger agreement and the closing of the merger, directly or indirectly:

The merger agreement does not, however, prohibit First Priority from furnishing information or access to a third party who has made an alternative acquisition proposal and participating in discussions and negotiating with such person prior to the receipt of shareholder approval if specified conditions are met. Among those conditions is a good faith determination by First Priority’s board of directors that the acquisition proposal constitutes or that could reasonably be expected to lead to a proposal that is more favorable, from a financial point of view, to First Priority and its shareholders than the transactions contemplated by the merger agreement and is reasonably capable of being completed on its stated terms, taking into account all financial, regulatory, legal and other aspects of the proposal.

For further discussion of the restrictions on solicitation of acquisition proposals from third parties, see “The Merger Agreement—Agreement Not to Solicit Other Offers” beginning on page 82.

Termination of the Merger Agreement (page 86)

We may mutually agree to terminate the merger agreement before completing the merger, even after First Priority or Mid Penn shareholder approval. In addition, either of us may decide to terminate the merger agreement, if (i) a court or governmental entity issues a final order that is not appealable prohibiting the merger, (ii) a bank regulator which must grant a regulatory approval as a condition to the merger denies such approval of the merger and such denial has become final and is not appealable, (iii) the shareholders of Mid Penn or First Priority fail to approve the merger at their respective special meetings, or (iv) the other party breaches the merger agreement in a way that would entitle the party seeking to terminate the agreement not to consummate the merger, subject to the right of the breaching party to cure the breach within 30 days following written notice. Either of us may terminate the merger agreement if the merger has not been completed by December 31, 2018, unless the reason the merger has not been completed by that date is a breach of the merger agreement by the company seeking to terminate the merger agreement.

Mid Penn may terminate the merger agreement if the First Priority board of directors, in connection with the receipt of an alternative acquisition proposal, (1) enters into a letter of intent, agreement in principle or an acquisition agreement with respect to the alternative acquisition proposal, (2) fails to make, withdraws, modifies or qualifies its recommendation of the merger agreement in a manner adverse to Mid Penn, or (3) has otherwise made a determination to accept the alternative acquisition proposal.

First Priority may terminate the merger agreement if First Priority receives an alternative acquisition proposal and has made a determination to accept the alternative acquisition proposal. First Priority may also terminate the merger agreement within five days of its receipt of written notice from Mid Penn that Mid Penn intends to consummate or enter into an agreement: (1) to acquire a third party or group by way of merger, consolidation, share exchange or similar transaction, (2) with respect to any transaction pursuant to which Mid Penn would acquire twenty-five percent (25%) or more of the assets of a third party, or (3) to issue or sell any equity or debt securities of Mid Penn (other than pursuant to existing stock purchase and dividend reinvestment plans maintained by Mid Penn).

However, if First Priority chooses to exercise this termination right, Mid Penn has the option, within forty-eight hours of receipt of notice from First Priority, to terminate the proposed transaction and prevent termination under this provision.

Termination Fee (page 87)

First Priority will pay Mid Penn a termination fee of $3,500,000 if the merger agreement is terminated under the following circumstances:

Additionally, First Priority will pay Mid Penn a termination fee of $3,500,000 in the event that First Priority enters into a definitive agreement relating to, or consummates, an acquisition proposal within twelve months following termination of the merger agreement:

Regulatory Approvals Required for the Merger (page 73)

Completion of the merger and the bank merger are subject to the receipt of all approvals required to complete the transactions contemplated by the merger agreement, including from the Board of Governors of the Federal Reserve System (the “FRB”), the Federal Deposit Insurance Corporation (the “FDIC”) and the Pennsylvania Department of Banking and Securities (the “PDB”).

Notifications and/or applications requesting approval may also be submitted to various other federal and state regulatory authorities and self-regulatory organizations. Mid Penn and First Priority have agreed to use their reasonable best efforts to obtain all required regulatory approvals. As of the date of this joint proxy statement/prospectus, Mid Penn has received the requisite approvals or waivers from the FRB, the FDIC and the PDB, which remain effective as of the date of this document.

Risk Factors (page 33)

You should consider all the information contained in or incorporated by reference into this joint proxy statement/prospectus in deciding how to vote for the proposals presented in the joint proxy statement/prospectus. In particular, you should consider the factors described under “Risk Factors.”

SELECTED CONSOLIDATED HISTORICAL FINANCIAL DATA OF MID PENN

The following table provides historical consolidated summary financial data for Mid Penn. The data for the years ended December 31, 2017, 2016, 2015, 2014 and 2013 are derived from Mid Penn’s audited financial statements as of or for the periods then ended. The results of operations for the three months ended March 31, 2018 and 2017 are not necessarily indicative of the results of operations for the full year or any other interim period. Mid Penn’s management prepared the unaudited information on the same basis as it prepared Mid Penn’s audited consolidated financial statements. In the opinion of Mid Penn’s management, this information reflects all adjustments, consisting of only normal recurring adjustments, necessary for a fair presentation of this data for those dates.

SELECTED CONSOLIDATED HISTORICAL FINANCIAL DATA OF FIRST PRIORITY

The following table provides historical consolidated summary financial data for First Priority. The data for the years ended December 31, 2017, 2016, 2015, 2014 and 2013 are derived from First Priority’s audited financial statements as of or for the periods then ended. The results of operations for the three months ended March 31, 2018 and 2017 are not necessarily indicative of the results of operations for the full year or any other interim period. First Priority’s management prepared the unaudited information on the same basis as it prepared First Priority’s audited consolidated financial statements. In the opinion of First Priority’s management, this information reflects all adjustments, consisting of only normal recurring adjustments, necessary for a fair presentation of this data for those dates.

SELECTED CONSOLIDATED HISTORICAL FINANCIAL DATA OF SCOTTDALE

The following table provides historical consolidated summary financial data for Scottdale. The data for the year ended December 31, 2017 are derived from Scottdale’s unaudited financial statements as of or for the period then ended, and the data for the year ended December 31, 2016 are derived from Scottdale’s audited financial statements as of or for the period then ended. The unaudited financial information for the year ended December 31, 2017 was prepared on the same basis as Scottdale’s audited consolidated financial statements. In the opinion of Mid Penn’s management, this information reflects all adjustments, consisting of only normal recurring adjustments, necessary for a fair presentation of this data for those dates. Upon the closing of the merger of Scottdale with and into Mid Penn Bank effective January 8, 2018, Mid Penn Bank acquired all of the assets and assumed all of the liabilities of Scottdale.

UNAUDITED PRO FORMA COMBINED CONSOLIDATED FINANCIAL INFORMATION

The following unaudited pro forma combined condensed consolidated financial information has been prepared using the acquisition method of accounting, giving effect to the merger of Mid Penn with First Priority. The following unaudited pro forma combined consolidated financial information is based upon the assumption that the total number of shares of First Priority common stock outstanding immediately prior to the completion of the merger will be 6,646,469 and utilizes the exchange ratio of 0.3481 shares of Mid Penn common stock for each share of First Priority common stock issued and outstanding as of the effective time of the merger, which will result in approximately 2,313,636 shares of Mid Penn common stock being issued in the transaction.

The following unaudited pro forma combined consolidated financial statements as of and for the periods ended March 31, 2018 and December 31, 2017 combine the historical consolidated financial statements of Mid Penn and First Priority. The unaudited pro forma combined consolidated financial statements give effect to the proposed merger as if the merger occurred on March 31, 2018 with respect to the consolidated balance sheet, and at the beginning of the applicable period, for the three months ended March 31, 2018 and for the year ended December 31, 2017, with respect to the consolidated income statement.

The notes to the unaudited pro forma combined consolidated financial statements describe the pro forma amounts and adjustments presented below. THIS PRO FORMA DATA IS NOT NECESSARILY INDICATIVE OF THE OPERATING RESULTS THAT MID PENN WOULD HAVE ACHIEVED HAD IT COMPLETED THE MERGER AS OF THE BEGINNING OF THE PERIOD PRESENTED AND SHOULD NOT BE CONSIDERED AS REPRESENTATIVE OF FUTURE OPERATIONS.

The Mid Penn pro forma balance sheet and income statement information as of March 31, 2018 presented below reflects the acquisition of Scottdale by Mid Penn, which was completed on January 8, 2018. The Mid Penn pro forma income statement information as of December 31, 2017 does not reflect the acquisition of Scottdale by Mid Penn.

Certain reclassifications have been made to First Priority historical financial information in order to conform to Mid Penn’s presentation of financial information.

The actual value of Mid Penn’s common stock to be recorded as consideration in the merger will be based on the closing price of Mid Penn’s common stock at the time of the merger completion date. The proposed merger is targeted for completion in the third quarter of 2018. There can be no assurance that the merger will be completed as anticipated. For purposes of the pro forma financial information, the fair value of Mid Penn common stock to be issued in connection with the merger of First Priority was based on Mid Penn’s closing stock price of $37.50 on January 12, 2018.

The pro forma financial information includes estimated adjustments, including adjustments to record assets and liabilities of First Priority at their respective fair values and represents the pro forma estimates by Mid Penn based on available fair value information as of the date of the merger agreement. In some cases, where noted, more recent information has been used to support estimated adjustments in the pro forma financial information.

We anticipate that the merger will provide the combined company with financial benefits that include reduced operating expenses. The unaudited pro forma combined condensed consolidated financial data, while helpful in illustrating the financial characteristics of the combined company under one set of assumptions, does not reflect the benefits of expected cost savings or opportunities to earn additional revenue and, accordingly, does not attempt to predict or suggest future results. It also does not necessarily reflect what the historical results of the combined company would have been had our companies been combined during these periods.

The unaudited pro forma combined consolidated financial information presented below is based on, and should be read together with, the historical financial information that Mid Penn, First Priority and Scottdale have included in or incorporated by reference in this joint proxy statement/prospectus as of and for the indicated periods.

Pro Forma Combined Consolidated Balance Sheet as of March 31, 2018

Unaudited (in thousands, except share and per share data)

Pro Forma Combined Consolidated Statement of Income

For the Twelve Months Ended December 31, 2017

Unaudited (in thousands, except per share data)