SUMMARY

The following summary highlights some of the information contained in this joint proxy statement/prospectus. This summary may not contain all of the information that is important to you. For a more complete description of the merger agreement, the mergers and the other transactions contemplated by the merger agreement, MAA and Post Properties encourage you to read carefully this entire joint proxy statement/prospectus, including the attached Annexes and the other documents to which we have referred you because this section does not provide all the information that might be important to you with respect to the mergers and the other matters being considered at the applicable special meeting. See also the section entitled “Where You Can Find More Information” beginning on page 201. We have included page references to direct you to a more complete description of the topics presented in this summary.

The Companies

Mid-America Apartment Communities, Inc. (See page 51)

MAA is a Tennessee corporation that has elected to be taxed as a REIT under the Code. MAA owns, acquires, renovates, develops and manages apartment communities in the Sunbelt region of the United States. As of June 30, 2016, MAA owned a total of 256 multifamily apartment communities comprising 80,300 apartment units located in 15 states. MAA also had four development communities under construction totaling 628 units as of June 30, 2016.

MAA’s most significant asset is its ownership interest in MAA LP. MAA conducts substantially all of its business and holds substantially all of its assets through MAA LP, and by virtue of its ownership interest and being MAA LP’s sole general partner, MAA has the ability to control all of the day-to-day operations of MAA LP. As of June 30, 2016, MAA owned 75,524,086 common units of partnership interest, or approximately 94.8% of the outstanding partnership interests in MAA LP.

MAA common stock is listed on the NYSE, trading under the symbol “MAA.”

MAA was incorporated in the state of Tennessee in 1993, and MAA LP was formed in the state of Tennessee in 1993. MAA’s principal executive offices are located at 6584 Poplar Avenue, Memphis, Tennessee 38138, and its telephone number is (901) 682-6600. MAA had 1,949 full-time employees and 40 part-time employees as of December 31, 2015.

Post Properties, Inc. (See page 51)

Post Properties, a Georgia corporation, is a self-administered and self-managed REIT. Post Properties and its subsidiaries develop, own and manage upscale multifamily apartment communities in selected markets in the United States. Post Properties through its wholly-owned subsidiaries is the sole general partner, a limited partner and owns a majority interest in Post Apartment Homes, L.P., or Post LP, a Georgia limited partnership. Post LP, through its operating divisions and subsidiaries, conducts substantially all of the on-going operations of Post Properties. As of June 30, 2016, Post Properties owned or owned interests in a total of 61 multifamily apartment communities comprising 24,162 apartment units located in six states plus Washington, D.C., including 1,471 apartment units in four communities held in unconsolidated entities and 2,630 apartment units in seven communities under development or in lease-up.

Post Properties’ only material asset is its ownership interest in Post LP. Post LP and its subsidiaries conduct substantially all of Post Properties’ business, hold substantially all of Post Properties’ consolidated assets and

generate substantially all of Post Properties’ revenues. Through its wholly-owned subsidiaries, Post Properties is the sole general partner of Post LP and, as of June 30, 2016, owned approximately 99.8% of the outstanding partnership interests in Post LP.

Post Properties common stock is listed on the NYSE, trading under the symbol “PPS.”

Post Properties’ principal executive offices are located at One Riverside, 4401 Northside Parkway, Suite 800, Atlanta, Georgia 30327, and its telephone number is (404) 846-5000. Post Properties had 619 employees as of December 31, 2015.

The Combined Corporation (See page 52)

The Combined Corporation will be named “Mid-America Apartment Communities, Inc.” and will be a Tennessee corporation that has elected to be taxed as a REIT under the Code. The Combined Corporation will be a Sunbelt-focused, publicly-traded, multifamily REIT with enhanced capabilities to deliver value for residents, shareholders and employees. The Combined Corporation is expected to have a pro forma equity market capitalization of approximately $11 billion, and a pro forma total market capitalization of approximately $16 billion, each as of September 29, 2016, the latest practicable trading day before the date of this joint proxy statement/prospectus. The Combined Corporation’s asset base will consist primarily of 105,008 apartment units in 317 multifamily apartment communities. The Combined Corporation will maintain strategic diversity across urban and suburban locations in large and secondary markets within the high-growth Sunbelt region of the United States. The Combined Corporation’s ten largest markets by unit count will be Atlanta, Dallas, Austin, Charlotte, Raleigh, Orlando, Tampa, Fort Worth, Houston and Washington, D.C.

The business of the Combined Corporation will be operated through MAA LP and its subsidiaries and will be structured as a traditional UPREIT. On a pro forma basis giving effect to the mergers, the Combined Corporation will own an approximate 96.4% partnership interest in MAA LP and, as its sole general partner, the Combined Corporation will have the full, exclusive and complete responsibility for and discretion in the day-to-day management and control of MAA LP.

The common stock of the Combined Corporation will be listed on the NYSE, trading under the symbol “MAA.”

The Combined Corporation’s principal executive offices will be located at 6584 Poplar Avenue, Memphis, Tennessee 38138, and its telephone number will be (901) 682-6600.

The Mergers

The Merger Agreement (See page 148)

MAA, MAA LP, Post Properties, Post GP and Post LP have entered into the merger agreement attached as Annex A to this joint proxy statement/prospectus, which is incorporated herein by reference. MAA and Post Properties encourage you to carefully read the merger agreement in its entirety because it is the principal document governing the merger and the other transactions contemplated by the merger agreement.

The Mergers (See page 70)

Subject to the terms and conditions of the merger agreement, at the effective time of the parent merger, Post Properties will merge with and into MAA, which is referred to herein as the parent merger, with MAA surviving the parent merger as the combined company, which is referred to herein as the Combined Corporation. The

shares of common stock of the Combined Corporation are expected to be listed and traded on the NYSE under the symbol “MAA.” The merger agreement also provides for the merger, prior to the parent merger, of Post LP with and into MAA LP with MAA LP continuing as the surviving entity, which is referred to herein as the partnership merger, and, together with the parent merger, are referred to herein as the mergers.

Upon completion of the mergers, we estimate that continuing MAA common shareholders will own approximately 67.7% of the issued and outstanding shares of common stock of the Combined Corporation, assuming the conversion of all limited partnership units of MAA LP held by existing limited partners of MAA LP to shares of Combined Corporation common stock, and former Post Properties common shareholders will own approximately 32.3% of the issued and outstanding shares of common stock of the Combined Corporation, assuming the conversion to shares of Combined Corporation common stock of all limited partnership units issued by MAA LP to former limited partners of Post LP.

The Merger Consideration (See page 149)

In the parent merger, each share of Post Properties common stock issued and outstanding immediately prior the effective time of the parent merger will be converted into the right to receive 0.71 shares of MAA common stock. The exchange ratio is fixed and will not be adjusted for changes in the market value of MAA common stock or Post Properties common stock. Because of this, the implied value of the consideration to be received by Post Properties common shareholders in the parent merger will fluctuate between now and the completion of the mergers. Based on MAA’s closing price of $102.15 per share on August 12, 2016, the last trading day before the announcement of the mergers, the exchange ratio represented approximately $72.53 in MAA common stock for each share of Post Properties common stock. Based on MAA’s closing price of $96.15 per share on September 29, 2016, the latest practicable trading day before the date of this joint proxy statement/prospectus, the exchange ratio represented approximately $68.27 in MAA common stock for each share of Post Properties common stock.

You are urged to obtain current market prices of shares of MAA common stock and Post Properties common stock. You are cautioned that the trading price of the common stock of the Combined Corporation after the mergers may be affected by factors different from those currently affecting the trading prices of MAA common stock and Post Properties common stock, and therefore, the historical trading prices of MAA and Post Properties may not be indicative of the trading price of the Combined Corporation. See the risks related to the mergers and the related transactions described under the section “Risk Factors—Risk Factors Relating to the Mergers” beginning on page 36.

Treatment of Post Properties Preferred Stock (See page 150)

In addition, in the parent merger, each outstanding share of Post Properties Series A preferred stock will be automatically converted into the right to receive one newly issued share of MAA Series I preferred stock, which will have the same rights, preferences, privileges and voting powers as those of the Post Properties Series A preferred stock.

Recommendation of the MAA Board (See page 84)

After careful consideration, the MAA Board has unanimously (i) determined and declared that the merger agreement, the parent merger and the other transactions contemplated by the merger agreement, including the issuance of shares of MAA common stock to Post Properties shareholders in the parent merger, are advisable and in the best interests of MAA and its shareholders, (ii) adopted and approved the merger agreement, the parent merger and the other transactions contemplated by the merger agreement, and (iii) determined and declared that, due to the transactions contemplated by the merger agreement, it is necessary, advisable, desirable and in the best interest of MAA to amend the MAA charter to increase the number of shares of MAA common stock authorized

for issuance from 100,000,000 shares to 145,000,000 shares. The MAA Board unanimously recommends that MAA shareholders vote: FOR the proposal to approve the merger agreement, the parent merger and the other transactions contemplated by the merger agreement; FOR the proposal to approve an amendment to the MAA charter to increase the number of authorized shares of MAA common stock from 100,000,000 shares to 145,000,000 shares; and FOR the proposal to approve one or more adjournments of the special meeting, if necessary or appropriate, including adjournments to permit further solicitation of proxies in favor of approval of the merger agreement and the parent merger and approval of the MAA charter amendment.

Recommendation of the Post Properties Board (See page 88)

After careful consideration, the Post Properties Board has unanimously, (i) approved, adopted, declared advisable and authorized the merger agreement and the transactions contemplated thereby, including the parent merger and the partnership merger, and (ii) recommended the approval of the merger agreement and the parent merger by Post Properties shareholders. The Post Properties Board unanimously recommends that Post Properties shareholders vote: FOR the proposal to approve the merger agreement, the parent merger and the other transactions contemplated by the merger agreement; FOR the proposal to approve, on an advisory (non-binding) basis, the compensation payable to certain executive officers of Post Properties in connection with the parent merger; and FOR the proposal to approve one or more adjournments of the Post Properties special meeting, if necessary or appropriate, including adjournments to permit further solicitation of proxies in favor of approval of the merger agreement and the parent merger.

Summary of Risk Factors Related to the Merger (See page 36)

You should carefully consider all of the risk factors together with all of the other information included in this joint proxy statement/prospectus before deciding how to vote. The risks related to the mergers and the related transactions are described under the section “Risk Factors—Risk Factors Relating to the Mergers” beginning on page 36.

The MAA Special Meeting (See page 53)

The MAA special meeting will be held at MAA’s corporate headquarters, 6584 Poplar Avenue, Memphis, Tennessee 38138, on November 10, 2016, at 8:30 a.m., local time.

At the MAA special meeting, MAA shareholders will be asked to consider and vote upon the following matters:

Approval of the MAA merger proposal requires the affirmative vote of holders of a majority of the outstanding shares of MAA common stock entitled to vote on the proposal.

Approval of the MAA charter amendment proposal requires the affirmative vote of a majority of shares of MAA common stock present in person or by proxy at the MAA special meeting and entitled to vote on the proposal.

Approval of the MAA adjournment proposal requires that the votes cast “FOR” the proposal exceed the votes cast “AGAINST” the proposal.

At the close of business on the record date, directors and executive officers of MAA and their affiliates were entitled to vote 482,516 shares of MAA common stock, or approximately 0.6% of the shares of MAA common stock issued and outstanding on that date. MAA currently expects that the MAA directors and executive officers will vote their shares of MAA common stock in favor of the MAA merger proposal as well as the other proposals to be considered at the MAA special meeting, although none of them is obligated to do so.

Your vote as a MAA shareholder is very important. Accordingly, please sign and return the enclosed proxy card whether or not you plan to attend the MAA special meeting in person.

The Post Properties Special Meeting (See page 61)

The Post Properties special meeting will be held at the offices of King & Spalding LLP located at 1180 Peachtree Street N.E., Atlanta, Georgia 30309, on November 10, 2016, at 9:30 a.m., local time.

At the Post Properties special meeting, Post Properties shareholders will be asked to consider and vote upon the following matters:

Approval of the merger agreement, the parent merger and the other transactions contemplated by the merger agreement, will require the affirmative vote of the holders of a majority of the shares of Post Properties common stock entitled to vote on the proposal. Approval of the Post Properties merger proposal is a condition to the closing of the parent merger.

Approval, on an advisory (non-binding) basis, of the compensation payable to certain executive officers of Post Properties in connection with the parent merger will require that the number of votes cast in favor of the proposal exceeds the votes cast opposing the proposal. An abstention from voting on this proposal will have no effect on the outcome of this proposal.

Assuming a quorum is present, approval of one or more adjournments of the Post Properties special meeting, if necessary or appropriate, including adjournments to permit further solicitation of proxies in favor of approval and adoption of the merger agreement and the parent merger, will require that the number of votes cast in favor of the proposal exceeds the votes cast opposing the proposal. If a quorum is not present, the Post Properties special meeting may be adjourned by the affirmative vote of the holders of a majority of the shares of Post Properties common stock present in person or by proxy.

At the close of business on the Post Properties record date, directors and executive officers of Post Properties and their affiliates were entitled to vote 983,919 shares of Post Properties common stock, or approximately 1.84% of the 53,508,995 Post Properties common stock issued and outstanding on that date. Post Properties currently expects that the Post Properties directors and executive officers will vote their shares of Post Properties common stock in favor of the Post Properties merger proposal as well as the other proposals to be considered at the Post Properties special meeting, although none of them is obligated to do so.

Your vote as a Post Properties shareholder is very important. Accordingly, please sign and return the enclosed proxy card whether or not you plan to attend the Post Properties special meeting in person.

Opinions of Financial Advisors

Opinion of MAA’s Financial Advisor (See page 93)

MAA has retained Citigroup Global Markets Inc., which we refer to as Citi, as its financial advisor in connection with the mergers. In connection with this engagement, MAA requested that Citi evaluate the fairness, from a financial point of view, of the exchange ratio of 0.71x provided for in the parent merger as of the date of Citi’s opinion. On August 12, 2016, at a meeting of the MAA Board, Citi rendered to the MAA Board an oral opinion, which was subsequently confirmed by delivery of a written opinion, dated August 14, 2016, to the effect that, as of that date and based on and subject to the matters, considerations and limitations set forth in the opinion, Citi’s work and other factors it deemed relevant, each as described in greater detail in the section titled “The Mergers—Opinion of MAA’s Financial Advisor,” the exchange ratio of 0.71x provided for in the parent

merger was fair, from a financial point of view, to MAA. Citi’s opinion, the issuance of which was authorized by Citi’s fairness opinion committee, was provided to the MAA Board (in its capacity as such) in connection with its evaluation of the mergers and was limited to the fairness, from a financial point of view, as of the date of the opinion, to MAA of the exchange ratio of 0.71x provided for in the parent merger. Citi’s opinion does not address any other aspects or implications of the mergers and does not constitute a recommendation to any shareholder as to how such shareholder should vote or act on any matters relating to the mergers. The summary of Citi’s opinion is qualified in its entirety by reference to the full text of the opinion. We encourage you to read the full text of Citi’s written opinion, which is attached to this joint proxy statement/prospectus as Annex D and is incorporated into this joint proxy statement/prospectus by reference in its entirety, and sets forth, among other things, the assumptions made, procedures followed, matters considered and limitations and qualifications on the scope of review undertaken.

See “The Mergers—Opinion of MAA’s Financial Advisor” beginning on page 93.

Opinion of Post Properties’ Financial Advisor (See page 100)

On August 14, 2016, at the meeting of the Post Properties Board at which the parent merger was approved, J.P. Morgan Securities LLC, which we refer to as J.P. Morgan, the financial advisor of Post Properties in connection with the proposed parent merger, rendered to the Post Properties Board an oral opinion, confirmed by delivery of a written opinion, dated August 14, 2016, to the effect that, as of such date and based upon and subject to the factors, assumptions, qualifications and any limitations set forth in its written opinion, the exchange ratio in the proposed parent merger was fair, from a financial point of view, to the holders of Post Properties common stock.

The full text of J.P. Morgan’s written opinion, dated as of August 14, 2016, is attached as Annex E to this joint proxy statement/prospectus and is incorporated herein by reference. The full text of the opinion contains a discussion of, among other things, the assumptions made, matters considered, and qualifications and any limitations on the opinion and the review undertaken by J.P. Morgan in connection with rendering its opinion. The summary of the opinion of J.P. Morgan set forth in this joint proxy statement/prospectus is qualified in its entirety by reference to the full text of such opinion. Post Properties shareholders are urged to read the opinion carefully and in its entirety. J.P. Morgan’s written opinion was addressed to the Post Properties Board (in its capacity as such) in connection with and for the purposes of its evaluation of the proposed parent merger, was directed only to the fairness, from a financial point of view, to the holders of Post Properties common stock of the exchange ratio in the proposed parent merger and did not address any other aspect of the parent merger or the other transactions contemplated by the merger agreement. J.P. Morgan expressed no opinion as to the fairness of the exchange ratio to the holders of any other class of securities, creditors or other constituencies of Post Properties or as to the underlying decision by Post Properties to engage in the parent merger. The opinion does not constitute a recommendation to any shareholder of Post Properties as to how such shareholder should vote with respect to the proposed parent merger or any other matter.

For a description of the opinion that the Post Properties Board received from J.P. Morgan, see “The Mergers—Opinion of Post Properties’ Financial Advisor” beginning on page 100.

Treatment of the Post Properties Series A Preferred Stock (See page 150)

At the effective time of the parent merger, each share of the Post Properties Series A preferred stock issued and outstanding as of immediately prior to the effective time of the merger will be automatically converted into the right to receive one newly issued share of MAA Series I preferred stock, which will have the same rights, preferences, privileges and voting powers as those of the Post Properties Series A preferred stock, subject to any applicable withholding tax.

Treatment of the Post Properties Equity Incentive Plans (See page 150)

At the effective time of the parent merger, each outstanding option to purchase shares of Post Properties common stock, which are referred to herein as Post Properties options, will vest in full and be assumed by MAA. Each Post Properties option assumed by MAA will continue to have, and be subject to, the same terms and conditions (other than vesting) as were applicable to the corresponding Post Properties option immediately prior to the effective time of the parent merger, but will be exercisable for a number of shares of MAA common stock and at an exercise price calculated based on the exchange ratio.

In addition, immediately prior to the effective time of the parent merger, all outstanding issuance and forfeiture conditions on any shares of Post Properties common stock subject to restricted stock awards will be deemed satisfied in full and entitled to receive the merger consideration.

See “The Merger Agreement—Merger Consideration; Effects of the Parent Merger and the Partnership Merger—Assumption of Post Properties Equity Incentive Plans by MAA” beginning on page 150.

Directors and Management of MAA After the Mergers (See page 149)

Immediately following the effective time of the parent merger, the MAA Board will be increased to 13 members, with the ten current MAA directors, H. Eric Bolton, Jr., Alan B. Graf, Jr., James K. Lowder, Thomas H. Lowder, Monica McGurk, Claude B. Nielsen, Philip W. Norwood, W. Reid Sanders, William B. Sansom and Gary Shorb, continuing as directors of the Combined Corporation. H. Eric Bolton, Jr., MAA’s Chief Executive Officer and Chairman of the Board of Directors, will serve as Chief Executive Officer and Chairman of the Board of Directors of the Combined Corporation. Alan B. Graf, Jr., Lead Independent Director for MAA, will serve as Lead Independent Director for the Combined Corporation. The MAA Board will fill the three newly created vacancies by immediately appointing to the MAA Board three members designated by the Post Properties Board. The Post Properties Board has designated Russell R. French, Toni Jennings and David P. Stockert, which members are referred to herein as the Post Properties designees, to serve until the 2017 annual meeting of MAA’s shareholders (and until their successors have been duly elected and qualified). The Post Properties designees will be nominated by the MAA Board for reelection at the 2017 annual meeting of MAA’s shareholders, subject to the satisfaction and compliance of such Post Properties designees with MAA’s then-current corporate governance guidelines and code of business conduct and ethics.

The executive officers of MAA immediately prior to the effective time of the mergers will continue as the executive officers of the Combined Corporation following the effective time of the mergers.

Interests of MAA’s Directors and Executive Officers in the Mergers (See page 114)

In considering the recommendation of the MAA Board to approve the merger agreement, the parent merger and the other transactions contemplated by the merger agreement, MAA shareholders should be aware that certain executive officers and directors of MAA have certain interests in the mergers that may be different from, or in addition to, the interests of MAA shareholders generally. These interests may create potential conflicts of interest. The MAA Board was aware of those interests and considered them, among other matters, in reaching its decision to approve the merger agreement, the parent merger and the transactions contemplated thereby.

Interests of Post Properties’ Directors and Executive Officers in the Merger (See page 115)

In considering the recommendation of the Post Properties Board to approve and adopt the merger agreement, the parent merger and the other transactions contemplated by the merger agreement, Post Properties shareholders should be aware that executive officers and directors of Post Properties have certain interests in the mergers that may be different from, or in addition to, the interests of Post Properties shareholders generally.

These interests may create potential conflicts of interest. The Post Properties Board was aware of those interests and considered them, among other matters, in reaching its decision to approve and adopt the merger agreement, the parent merger and the transactions contemplated by the merger agreement.

Listing of Shares of the Combined Corporation Common Stock and MAA Series I Preferred Stock; Delisting and Deregistration of Post Properties Common Stock and Post Properties Series A Preferred Stock (See page 147)

It is a condition to the completion of the mergers that the shares of MAA common stock and MAA Series I preferred stock issuable in connection with the parent merger be approved for listing on the NYSE, subject to official notice of issuance. After the parent merger is completed, the Post Properties common stock and Post Properties Series A preferred stock currently listed on the NYSE will cease to be listed on the NYSE and will be deregistered under the Exchange Act.

No Shareholder Dissenters’ Rights in the Parent Merger (See page 171)

No dissenters’ or appraisal rights, or rights of objecting shareholders, will be available with respect to the parent merger or the other transactions contemplated by the merger agreement.

Conditions to Completion of the Mergers (See page 164)

A number of conditions must be satisfied or waived, where legally permissible, before the mergers can be consummated. These include, among others:

Neither MAA nor Post Properties can give any assurance as to when or if all of the conditions to the consummation of the mergers will be satisfied or waived or that the mergers will occur.

For more information regarding the conditions to the consummation of the mergers and a complete list of such conditions, see “The Merger Agreement—Conditions to Completion of the Merger” beginning on page  164.

Regulatory Approvals Required for the Mergers (See page 121)

MAA and Post Properties are not aware of any material federal or state regulatory requirements that must be complied with, or approvals that must be obtained, in connection with the mergers or the other transactions contemplated by the merger agreement. See “The Mergers—Regulatory Approvals Required for the Mergers” beginning on page 121.

No Solicitation and Change in Recommendation (See page 158)

Under the merger agreement, each of MAA and Post Properties has agreed it will not, nor will it permit any of its subsidiaries to, authorize or permit any of its officers, directors or employees to, and will use its reasonable best efforts to cause its and its subsidiaries’ other representatives not to, directly or indirectly, (i) initiate, solicit or knowingly encourage or knowingly facilitate any inquiries or the making of any proposal or offer by or with a third party with respect to an Acquisition Proposal (as defined below in “The Merger Agreement—Covenants and Agreements—No Solicitation of Transactions”), (ii) engage in any negotiations concerning, or provide any confidential information or data to any person relating to an Acquisition Proposal, or knowingly facilitate any effort or attempt to make an Acquisition Proposal, (iii) approve or execute or enter into any letter of intent, agreement in principle, merger agreement, asset purchase or share exchange agreement, option agreement or other similar agreement providing for any Acquisition Proposal, or (iv) publicly propose or agree to do any of the foregoing.

However, prior to the approval of the parent merger and the other transactions contemplated by the merger agreement by their respective shareholders, each of MAA and Post Properties may, under certain specified circumstances, engage in discussions or negotiations with and provide nonpublic information regarding itself to a third party making an unsolicited, bona fide written Acquisition Proposal. Under the merger agreement, Post Properties is required to notify MAA promptly, and MAA is required to notify Post Properties promptly, if it receives any Acquisition Proposal or inquiry or any request for nonpublic information in connection with an Acquisition Proposal.

Before the approval of the parent merger and the other transactions contemplated by the merger agreement by their respective shareholders, each of the MAA Board and the Post Properties Board may, under certain specified circumstances, withdraw its recommendation to its shareholders with respect to the parent merger if it determines in good faith, after consultation with outside legal counsel, that failure to take such action would be inconsistent with the directors’ fiduciary duties under applicable law. For more information regarding the limitations on MAA, the MAA Board, Post Properties and the Post Properties Board to consider other Acquisition Proposals, see “The Merger Agreement—Covenants and Agreements—No Solicitation of Transactions” beginning on page 158.

Termination of the Merger Agreement (See page 166)

The merger agreement may be terminated at any time before the effective time of the parent merger by the mutual consent of MAA and Post Properties in a written instrument, which action must be taken or authorized by the MAA Board and the Post Properties Board.

In addition, either MAA or Post Properties may decide to terminate the merger agreement prior to the effective time of the parent merger if:

Post Properties may also decide to terminate the merger agreement:

MAA has reciprocal termination rights with respect to the merger agreement as those of Post Properties described above.

For more information regarding the rights of MAA and Post Properties to terminate the merger agreement, see “The Merger Agreement—Termination of the Merger Agreement” beginning on page 166.

Termination Fee and Expenses (See page 168)

Generally, all fees and expenses incurred in connection with the mergers and the transactions contemplated by the merger agreement will be paid by the party incurring those fees and expenses. However, if the merger agreement is terminated because either party fails to obtain the approval of its shareholders, among other reasons, such party will be required to pay the other party’s reasonable documented out-of-pocket expenses incurred up to a maximum of $10 million. In certain other circumstances, MAA may be obligated to pay Post Properties a termination fee of either $122.5 million or $245 million plus reasonable documented out-of-pocket expenses incurred up to a maximum of $10 million, or Post Properties may be obligated to pay MAA a termination fee of either $58.5 million or $117 million plus reasonable documented out-of-pocket expenses incurred up to a maximum of $10 million.

For more information regarding the termination fee and expense reimbursement, see “The Merger Agreement—Termination of the Merger Agreement—Termination Fee and Expenses Payable by Post Properties to MAA” beginning on page 168 and “The Merger Agreement—Termination of the Agreement—Termination Fee and Expenses Payable by MAA to Post Properties” beginning on page 169.

Material U.S. Federal Income Tax Consequences of the Parent Merger and Ownership of Combined Corporation Common Stock and MAA Series I Preferred Stock (See page 121)

Post Properties and MAA intend that the parent merger will qualify as a reorganization within the meaning of Section 368(a) of the Code. The closing of the parent merger is conditioned on the receipt by each of MAA

and Post Properties of an opinion from its respective counsel to the effect that the parent merger will qualify as a reorganization within the meaning of Section 368(a) of the Code. Assuming that the parent merger qualifies as a reorganization, U.S. holders of Post Properties common stock and Post Properties Series A preferred stock generally will not recognize gain or loss for U.S. federal income tax purposes upon the receipt of Combined Corporation common stock or MAA Series I preferred stock in exchange for Post Properties common stock or Post Properties Series A preferred stock, as applicable, in connection with the parent merger, except with respect to cash received in lieu of fractional shares of Combined Corporation common stock.

For further discussion of the material U.S. federal income tax consequences of the parent merger and the ownership of Combined Corporation common stock or MAA Series I preferred stock, see “The Mergers—Material U.S. Federal Income Tax Consequences of the Parent Merger and Combined Corporation Common Stock and MAA Series I Preferred Stock” beginning on page 121.

Holders of Post Properties common stock and Post Properties Series A preferred stock should consult their tax advisors to determine the tax consequences to them (including the application and effect of any state, local or non-U.S. income and other tax laws) of the parent merger.

Accounting Treatment of the Mergers (See page 145)

MAA prepares its financial statements in accordance with GAAP. The parent merger will be accounted for by applying the acquisition method. See “The Mergers—Accounting Treatment.”

Comparison of Rights of Shareholders of MAA and Shareholders of Post Properties (See page 183)

If the parent merger is consummated, shareholders of Post Properties will become shareholders of MAA. The rights of Post Properties shareholders are currently governed by and subject to the provisions of the Georgia Business Corporation Code, or the GBCC, and the articles of incorporation and bylaws of Post Properties. Upon consummation of the parent merger, the rights of the former Post Properties shareholders who receive MAA common stock or MAA Series I preferred stock will be governed by the Tennessee Business Corporation Act, or the TBCA, and the MAA charter and MAA bylaws, rather than the GBCC and the articles of incorporation and bylaws of Post Properties.

For a summary of certain differences between the rights of MAA shareholders and Post Properties shareholders, see “Comparison of Rights of Shareholders of MAA and Shareholders of Post Properties” beginning on page 183.

Selected Historical Financial Information of MAA

The following table sets forth selected consolidated financial information for MAA. The selected historical financial information for each of the fiscal years ended December 31, 2015, 2014 and 2013 and the selected balance sheet data as of December 31, 2015 and 2014 have been derived from MAA’s audited consolidated financial statements contained in its Annual Report on Form 10-K for the fiscal year ended December 31, 2015, which has been incorporated by reference into this joint proxy statement/prospectus. The selected historical financial information for each of the fiscal years ended December 31, 2012 and 2011 and the selected balance sheet data as of December 31, 2013, 2012 and 2011 have been derived from MAA’s historical audited financial statements for such years, which have not been incorporated by reference into this joint proxy statement/prospectus. The consolidated assets, liabilities, and results of operations of Colonial Properties Trust are included in MAA’s selected historical financial information from October 1, 2013, the closing date of the merger between MAA and Colonial Properties Trust.

The selected historical financial information for the six months ended June 30, 2016 and 2015 and the selected balance sheet data as of June 30, 2016 have been derived from MAA’s unaudited condensed consolidated financial statements contained in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, which has been incorporated by reference into this joint proxy statement/prospectus. The selected balance sheet data as of June 30, 2015 has been derived from MAA’s historical unaudited condensed consolidated financial statements for such quarter, which has not been incorporated by reference into this joint proxy statement/prospectus. In MAA’s opinion, such unaudited financial statements include all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the interim June 30, 2016 and 2015 financial information. Interim results for the six months ended and as of June 30, 2016 are not necessarily indicative of, and are not projections for, the results to be expected for the fiscal year ending December 31, 2016.

You should read this selected historical financial information together with the financial statements included in reports that are incorporated by reference in this joint proxy statement/prospectus and their accompanying notes and management’s discussion and analysis of operations and financial condition of MAA contained in such reports.

Selected Historical Financial Information of Post Properties

The following table sets forth selected consolidated financial information for Post Properties. The selected historical financial information for each of the fiscal years ended December 31, 2015, 2014 and 2013 and the selected balance sheet data as of December 31, 2015 and 2014 have been derived from Post Properties’ audited consolidated financial statements contained in its Annual Report on Form 10-K for the fiscal year ended December 31, 2015, which has been incorporated by reference into this joint proxy statement/prospectus. The selected historical financial information for each of the fiscal years ended December 31, 2012 and 2011 and the selected balance sheet data as of December 31, 2013, 2012 and 2011 have been derived from Post Properties’ historical audited financial statements for such years, which have not been incorporated by reference into this joint proxy statement/prospectus.

The selected historical financial information for the six months ended June 30, 2016 and 2015 and the selected balance sheet data as of June 30, 2016 have been derived from Post Properties’ unaudited consolidated financial statements contained in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, which has been incorporated by reference into this joint proxy statement/prospectus. The selected balance sheet data as of June 30, 2015 has been derived from Post Properties’ historical unaudited consolidated financial statements for such quarter, which has not been incorporated by reference into this joint proxy statement/prospectus. In Post Properties’ opinion, such unaudited financial statements include all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the interim June 30, 2016 and 2015 financial information. Interim results for the six months ended and as of June 30, 2016 are not necessarily indicative of, and are not projections for, the results to be expected for the fiscal year ending December 31, 2016.

You should read this selected historical financial information together with the financial statements included in reports that are incorporated by reference in this joint proxy statement/prospectus and their accompanying notes and management’s discussion and analysis of operations and financial condition of Post Properties contained in such reports.

Selected Unaudited Pro Forma Consolidated Financial Information (See page F-1)

The following tables show summary unaudited pro forma condensed consolidated financial information about the combined financial condition and operating results of MAA and Post Properties after giving effect to the mergers. The unaudited pro forma financial information assumes that the mergers are accounted for by applying the acquisition method and based on MAA’s preliminary estimates, assumptions and pro forma adjustments as described below and in the accompanying notes to the unaudited pro forma condensed consolidated financial information. The unaudited pro forma condensed consolidated balance sheet data gives effect to the mergers as if they had occurred on June 30, 2016. The unaudited pro forma condensed consolidated statement of income data gives effect to the mergers as if they had occurred on January 1, 2015, in each case based on the most recent valuation data available. The summary unaudited pro forma condensed consolidated financial information listed below has been derived from and should be read in conjunction with (1) the more detailed unaudited pro forma condensed consolidated financial information, including the notes thereto, appearing elsewhere in this joint proxy statement/prospectus and (2) the historical consolidated financial statements and related notes of both MAA and Post Properties, incorporated herein by reference. See “Unaudited Pro Forma Condensed Consolidated Financial Statements” beginning on page F-1 and “Where You Can Find More Information” beginning on page 201.

The unaudited pro forma condensed consolidated financial information is presented for illustrative purposes only and is not necessarily indicative of the operating results or financial position that would have occurred if the transactions had been consummated at the beginning of the earliest period presented, nor is it necessarily indicative of future operating results or financial position. The pro forma adjustments are estimates based upon information and assumptions available at the time of the filing of this joint proxy statement/prospectus.