QUESTIONS AND ANSWERS

The following are answers to some questions that you, as a stockholder of Cousins Properties Incorporated, a Georgia corporation (which we refer to as “Cousins”), or a stockholder of Parkway Properties, Inc., a Maryland corporation (which we refer to as “Parkway”), may have regarding the proposed transactions between Cousins and Parkway and the other matters being considered at the special meeting of Cousins and at the special meeting of Parkway. Cousins and Parkway urge you to carefully read this joint proxy statement/prospectus because the information in this section does not provide all the information that might be important to you with respect to the Merger and the other matters being considered at the special meetings. Additional important information is also contained in the annexes to and the documents incorporated by reference into this joint proxy statement/prospectus.

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. Cousins and Parkway urge you to read carefully this 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 of the information that might be important to you with respect to the Merger and the related matters being considered at the applicable special meeting. See also “Where You Can Find More Information.” We have included page references to direct you to a more complete description of the topics presented in this summary.

Information about the Companies

Cousins Properties Incorporated (See page 75)

Cousins, a Georgia corporation, is a self-administered and self-managed REIT for U.S. federal income tax purposes. As of the date of this joint proxy statement/prospectus, Cousins manages a 15.4 million square foot office and mixed-use portfolio and is consistently looking to execute attractive investment opportunities that create exceptional value for all of its stakeholders. Cousins primarily invests in Class A office towers and mixed-use developments in high-growth Sun Belt markets, including Atlanta, Georgia; Charlotte, North Carolina; and Austin, Dallas and Houston, Texas.

After the Merger and the Spin-Off, assuming certain asset sales are consummated in accordance with the Merger Agreement, Cousins’ portfolio is expected to encompass 41 high-quality properties comprising 18.4 million square feet of rentable space in Atlanta, Georgia; Austin, Texas; Charlotte, North Carolina; Phoenix, Arizona; and Orlando and Tampa, Florida. Cousins will operate in markets that are currently experiencing rent, employment and population growth ahead of the U.S. national average, and with low levels of new office space construction for such markets. Consistent with Cousins’ current strategy, Cousins expects to remain focused on maintaining its conservative, simple balance sheet.

The principal offices of Cousins are located at 191 Peachtree Street NE, Suite 500, Atlanta, Georgia 30303, and its telephone number is (404) 407-1000.

Cousins common stock is listed on the New York Stock Exchange (which we refer to as the “NYSE”), trading under the symbol “CUZ.”

Additional information about Cousins and its subsidiaries is included in documents incorporated by reference into this joint proxy statement/prospectus. For more information, see “Where You Can Find More Information.”

Cousins Properties LP (See page 75)

Cousins LP, a Delaware limited partnership, will function as the operating partnership of Cousins following consummation of the Merger and the UPREIT Reorganization. As the operating partnership of Cousins, Cousins LP will conduct substantially all of Cousins’ business, hold substantially all of Cousins’ consolidated assets and generate substantially all of Cousins’ revenues. At the effective time of the Merger, Cousins will hold the general partner interest in Cousins LP, as well as approximately 98% of the pro forma limited partnership interests of Cousins LP.

Clinic Sub Inc. (See page 75)

Clinic Sub Inc., a Maryland corporation, is a direct, wholly owned subsidiary of Cousins. Clinic Sub Inc. was formed by Cousins solely for the purpose of engaging in the transactions contemplated by the Merger

Agreement. Clinic Sub Inc. has not conducted any business activities, has no assets, liabilities or obligations and has conducted its operations solely as contemplated by the Merger Agreement. Its principal executive offices are located at c/o Cousins Properties Incorporated, 191 Peachtree Street NE, Suite 500, Atlanta, Georgia 30303, and its telephone number is (404) 407-1000.

Parkway Properties, Inc. (See page 76)

Parkway is a Maryland corporation that has elected to be taxed as a REIT under the Code. Parkway is a fully integrated, self-administered and self-managed REIT specializing in the acquisition, ownership, development and management of quality office properties in higher growth submarkets in the Sun Belt region of the United States. Parkway owned or had an interest in 34 office properties located in six states with an aggregate of approximately 14.0 million square feet of leasable space as of April 1, 2016. Fee-based real estate services are offered through wholly owned subsidiaries of Parkway (including Eola Office Partners, LLC), which in total managed and/or leased approximately 2.7 million square feet primarily for third-party owners as of April 1, 2016 (which we refer to as the “Third-Party Services Business”).

Parkway’s most significant asset is its ownership interest in Parkway LP, which, together with its subsidiaries, conducts substantially all of Parkway’s business, holds substantially all of Parkway’s consolidated assets and generates substantially all of Parkway’s revenues. Through a wholly owned subsidiary of Parkway, Parkway is the sole general partner of Parkway LP and, as of March 31, 2016, directly owned 111,602,419 common limited partnership units and indirectly owned 110,858 general partnership units, or approximately 95.9%, of the outstanding partnership interests of Parkway LP.

Parkway was incorporated in the state of Maryland in 1996, and Parkway LP was formed in the state of Delaware in 1997. Parkway’s principal executive offices are located at 390 North Orange Avenue, Suite 2400, Orlando, Florida 32801, and its telephone number is (407) 650-0593.

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

Shares of Parkway limited voting stock are not listed on any exchange.

Additional information about Parkway and its subsidiaries is included in documents incorporated by reference into this joint proxy statement/prospectus and “Where You Can Find More Information.”

Parkway Properties LP (See page 76)

Parkway LP, a Delaware limited partnership, together with its subsidiaries, conducts substantially all of Parkway’s business, holds substantially all of Parkway’s consolidated assets and generates substantially all of Parkway’s revenues. Through a wholly owned subsidiary of Parkway, Parkway is the sole general partner of Parkway LP and, as of March 31, 2016, directly owned 111,602,419 common limited partnership units and indirectly owned 110,858 general partnership units, or approximately 95.9%, of the outstanding partnership interests of Parkway LP.

In connection with the Separation, the UPREIT Reorganization and the Spin-Off, the Parkway Partnership Agreement will be amended to, among other things, include provisions that are customary for UPREIT partnerships, and New Parkway LP will become the operating partnership of New Parkway. Following the Separation, the UPREIT Reorganization and the Spin-Off, the sole asset of Parkway LP will be an approximately 47.5% limited partner interest in New Parkway LP. For more information, see “The Merger—Agreements to be Entered into in Connection with the Merger, the Separation and the UPREIT Reorganization—Amendment to the Parkway Partnership Agreement” and “The Merger—The Separation and the UPREIT Reorganization.”

Parkway, Inc. (See page 76)

New Parkway, a Maryland corporation, is currently a wholly owned subsidiary of Parkway.

At the effective time of the Merger, New Parkway will be led by Mr. James R. Heistand, the chief executive officer of Parkway, and several members of the existing Parkway senior management team. Mr. James A. Thomas, the current chairman of the Parkway board of directors, will become chairman of the New Parkway board of directors at the effective time of the Merger.

Following the Separation, the UPREIT Reorganization and the Spin-Off, it is expected that New Parkway will commence operations with five Class A office assets encompassing 8.7 million rentable square feet in the Galleria, Greenway and Westchase submarkets of Houston, Texas. Through the Merger, the Separation, the UPREIT Reorganization and the Spin-Off, New Parkway will also succeed to the Third-Party Services Business. At the effective time of the Spin-Off, New Parkway’s most significant asset will be its direct and indirect ownership of approximately 98% of the limited partnership interests of New Parkway LP, which, together with its subsidiaries, will conduct substantially all of New Parkway’s business, hold substantially all of New Parkway’s consolidated assets and generate substantially all of New Parkway’s revenues.

In connection with the Merger Agreement, Parkway and Parkway LP have entered into a debt commitment letter (which we refer to as the “Commitment Letter”) with Wells Fargo Bank, National Association, Wells Fargo Securities, LLC (which we refer to as “Wells Fargo Securities”), Bank of America, N.A., Merrill Lynch, Pierce, Fenner & Smith Incorporated (which we refer to as “BofA Merrill Lynch”) and JPMorgan Chase Bank, N.A. (which we refer to collectively as the “Lenders”) in which the Lenders have agreed, among other things, to provide to New Parkway LP (i) a senior secured loan facility in an aggregate principal amount of up to $350 million (which we refer to as the “New Parkway Term Loan”), and (ii) a senior secured revolving credit facility in an aggregate principal amount of up to $50 million, that may be increased to $100 million subject to the satisfaction of certain conditions (which we refer to as the “New Parkway Revolving Credit Facility,” and together with the New Parkway Term Loan, the “New Parkway Credit Facilities”). For more information, see “Information about the Companies.”

Parkway Operating Partnership LP (See page 77)

New Parkway LP, a Delaware limited partnership, will function as the operating partnership of New Parkway following consummation of the Separation, the UPREIT Reorganization and the Spin-Off. As the operating partnership of New Parkway, New Parkway LP will conduct substantially all of New Parkway’s business, hold substantially all of New Parkway’s consolidated assets and generate substantially all of New Parkway’s revenues. At the effective time of the Spin-Off, New Parkway will hold, directly and indirectly, approximately 98% of the partnership interests of New Parkway LP.

Risk Factors (See page 57)

Before voting at the Cousins special meeting or the Parkway special meeting, you should carefully consider all of the information contained in or incorporated by reference into this joint proxy statement/prospectus, as well as the specific factors under the heading “Risk Factors” beginning on page 57, including the risks that:

The Merger

The Merger Agreement (See page 151)

Cousins and Parkway have entered into the Merger Agreement attached as Annex A to this joint proxy statement/prospectus. The Cousins board of directors and the Parkway board of directors have both unanimously approved the combination of Cousins and Parkway and the Spin-Off of New Parkway. Cousins and Parkway encourage you to read the entire Merger Agreement carefully because it is the principal legal document governing the Merger.

Form of the Merger (See page 152)

Pursuant to the Merger Agreement, Parkway will merge with and into Merger Sub, with Merger Sub continuing its existence as a wholly owned subsidiary of Cousins.

We expect that the legacy stockholders of Cousins and the legacy common stockholders of Parkway will own approximately 53% and 47%, respectively, of the outstanding shares of Cousins common stock. Legacy holders of Parkway limited voting stock will own 100% of Cousins limited voting preferred stock.

Consideration to Common Stockholders in the Merger and the Spin-Off (See page 152)

Upon the terms of the Merger Agreement, upon consummation of the Merger, holders of Parkway common stock will have the right to receive 1.63 newly issued shares of Cousins common stock for each share of Parkway common stock they own immediately prior to the effective time of the Merger, with cash paid in lieu of fractional shares. The exchange ratio in the Merger is fixed and will not be adjusted for changes in the market value of Parkway common stock or Cousins common stock. Because of this, the implied value of the consideration to Parkway stockholders in the Merger will fluctuate between now and the completion of the Merger. Based on the closing price of Cousins common stock on the NYSE of $10.71 on April 28, 2016, the last trading day before public announcement of the Merger, the exchange ratio represented approximately $17.46 in Cousins common stock for each share of Parkway common stock. Based on the closing price of Cousins common stock on the NYSE of $11.00 on July 22, 2016, the latest practicable date before the date of this joint proxy statement/prospectus, the exchange ratio represented approximately $17.93 in Cousins common stock for each share of Parkway common stock. For more information, see “Comparative Stock Prices and Dividends.”

The following table presents trading information for Cousins common stock and Parkway common stock on April 28, 2016, the last trading day before public announcement of the Merger, and July 22, 2016, the latest practicable date before the date of this joint proxy statement/prospectus. Trading information for Parkway common stock adjusted by the exchange ratio of 1.63 is also provided for each of these dates.

The market prices of Cousins common stock and Parkway common stock fluctuate. As a result, we urge you to obtain current market quotations of Cousins common stock and Parkway common stock.

Treatment of Parkway Limited Voting Stock in the Merger (See page 152)

Prior to the effective time of the Merger, Cousins will adopt an amendment to the Cousins Articles in substantially the form of Exhibit E to the Merger Agreement, which amendment will become effective upon the effective time of the Merger and will authorize a class of Cousins limited voting preferred stock having rights, privileges, powers and preferences materially unchanged from the terms of the Parkway limited voting stock prior to the Merger. In connection with the Merger, each share of Parkway limited voting stock will be converted into 1.63 newly issued shares of Cousins limited voting preferred stock.

Treatment of Parkway Stock Options and Other Equity-Based Awards in the Merger (See page 152)

At the effective time of the Merger, upon the terms and subject to the conditions of the Merger Agreement, outstanding Parkway equity awards will be adjusted as follows:

Treatment of Cousins and Parkway Stock Options and Other Equity-Based Awards in the Spin-Off (See page 148)

Pursuant to the Merger Agreement, as of the effective time of the Spin-Off, outstanding Cousins equity awards are expected to be adjusted as follows:

Treatment of Parkway LP Units in the Merger and the Spin-Off (See page 152)

Each limited partner of Parkway LP will continue to be entitled, prior to the effective time of the Merger, to redeem or exchange its partnership interests (including LTIP Units) in Parkway LP for shares of Parkway common stock, which if so redeemed or exchanged prior to the effective time of the Merger, will in turn be converted in the Merger into the right to receive a number of newly issued shares of Cousins common stock equal to the exchange ratio, upon the terms and subject to the conditions of the Merger Agreement. Each limited partner of Parkway LP that does not elect to redeem or exchange its partnership interests for shares of Parkway common stock in connection with the Merger will retain its limited partnership interests in Parkway LP and receive pro rata limited partnership interests in Cousins LP in connection with the Separation, the UPREIT Reorganization and the Spin-Off.

Recommendations of the Cousins Board of Directors (See page 96)

After careful consideration, the Cousins board of directors, on April 28, 2016, unanimously approved the Merger Agreement and the transactions contemplated thereby, including the Merger, the Separation, the UPREIT Reorganization, and the Spin-Off, and declared the Merger Agreement and such transactions (including the Cousins Issuance Proposal and the Cousins Articles Amendment Proposal) to be advisable and in the best interest of Cousins and the stockholders of Cousins.

The Cousins board of directors unanimously recommends that holders of Cousins common stock vote “FOR” the Cousins Issuance Proposal, “FOR” the Cousins Articles Amendment Proposal and “FOR” the Cousins Adjournment Proposal.

For the factors considered by the Cousins board of directors in reaching its decision to approve the Merger Agreement and the recommendations of the Cousins board of directors, see “The Merger—Cousins’ Reasons for the Merger; Recommendations of the Cousins Board of Directors.”

Recommendation of the Parkway Board of Directors (See page 100)

After careful consideration, the Parkway board of directors, on April 28, 2016, unanimously approved the Merger Agreement and the transactions contemplated thereby, including the Merger, the Separation, the UPREIT Reorganization, and the Spin-Off, and declared the Merger Agreement and such transactions to be advisable and in the best interest of Parkway and the stockholders of Parkway.

The Parkway board of directors unanimously recommends that the Parkway stockholders vote “FOR” the Parkway Merger Proposal, “FOR” the Parkway Compensation Proposal and “FOR” the Parkway Adjournment Proposal.

For the factors considered by the Parkway board of directors in reaching its decision to approve the Merger Agreement and the recommendations of the Parkway board of directors, see “The Merger—Parkway’s Reasons for the Merger; Recommendations of the Parkway Board of Directors.”

Opinion of Cousins’ Financial Advisor (See page 103)

Opinion of Goldman, Sachs & Co.

At a meeting of the Cousins board of directors held on April 28, 2016, Goldman, Sachs & Co. (which we refer to as “Goldman Sachs”), Cousins’ financial advisor, rendered to the Cousins board of directors its oral opinion, subsequently confirmed in a written opinion dated April 28, 2016, to the effect that, as of the date of its written opinion and based upon and subject to the factors and assumptions set forth in Goldman Sachs’ written opinion, the exchange ratio of 1.63 shares of Cousins common stock to be issued for each share of Parkway common stock pursuant to the Merger Agreement was fair, from a financial point of view, to Cousins.

The full text of the written opinion of Goldman Sachs, dated April 28, 2016, which sets forth assumptions made, procedures followed, matters considered, qualifications and limitations on the review undertaken in connection with the opinion, is attached to this joint proxy statement/prospectus as Annex B. The summary of the Goldman Sachs opinion contained in this joint proxy statement/prospectus is qualified in its entirety by reference to the full text of Goldman Sachs’ written opinion. Goldman Sachs’ advisory services and opinion were provided for the information and assistance of the Cousins board of directors in connection with its consideration of the Merger, and the opinion does not constitute a recommendation as to how any holder of Cousins common stock should vote with respect to the Cousins Issuance Proposal, the Cousins Articles Amendment Proposal or any other matter.

For more information, see “The Merger—Opinion of Cousins’ Financial Advisor—Opinion of Goldman, Sachs & Co.” and Annex B.

Opinions of Parkway’s Financial Advisors (See page 112)

Opinion of Merrill Lynch, Pierce, Fenner & Smith Incorporated

Parkway has engaged BofA Merrill Lynch as a financial advisor in connection with the Merger. In connection with the Merger, BofA Merrill Lynch delivered a written opinion, dated April 28, 2016, to the

Parkway board of directors as to the fairness, from a financial point of view and as of such date, to the holders of Parkway common stock of the exchange ratio provided for in the Merger. The full text of BofA Merrill Lynch’s written opinion, dated April 28, 2016, is attached as Annex C to this joint proxy statement/prospectus and sets forth, among other things, the assumptions made, procedures followed, factors considered and limitations and qualifications on the review undertaken by BofA Merrill Lynch in rendering its opinion. BofA Merrill Lynch delivered its opinion to the Parkway board of directors for the benefit and use of the Parkway board of directors (in its capacity as such) in connection with and for purposes of its evaluation of the exchange ratio from a financial point of view. BofA Merrill Lynch’s opinion did not address any related transactions or other terms, aspects or implications of the Merger and no opinion or view was expressed as to the relative merits of the Merger or related transactions in comparison to other strategies or transactions that might be available to Parkway or in which Parkway might engage or as to the underlying business decision of Parkway to proceed with or effect the Merger or any related transactions. BofA Merrill Lynch also expressed no opinion or recommendation as to how any stockholder should vote or act in connection with the Merger, any related transactions or any other matter.

Opinion of Wells Fargo Securities, LLC

Parkway also engaged Wells Fargo Securities as a financial advisor in connection with the Merger. In connection with the Merger, Wells Fargo Securities rendered an opinion, dated April 28, 2016, to the Parkway board of directors as to the fairness, from a financial point of view and as of such date, to the holders of Parkway common stock of the exchange ratio provided for in the Merger. The full text of Wells Fargo Securities’ written opinion is attached as Annex D to this joint proxy statement/prospectus and is incorporated in this document by reference. The written opinion sets forth, among other things, the assumptions made, procedures followed, factors considered and limitations and qualifications on the review undertaken by Wells Fargo Securities in rendering its opinion. The opinion was addressed to the Parkway board of directors (in its capacity as such) for its information and use in connection with its evaluation of the exchange ratio from a financial point of view and did not address any related transactions or any other terms, aspects or implications of the Merger. Wells Fargo Securities’ opinion did not address the merits of the underlying decision by Parkway to enter into the Merger Agreement or the relative merits of the Merger or related transactions compared with other business strategies or transactions available or that have been or might be considered by Parkway or the Parkway board of directors or in which Parkway might engage. Wells Fargo Securities’ opinion does not constitute a recommendation to the Parkway board of directors or any other person or entity in respect of the Merger or any related transactions, including as to how any stockholder should vote or act in connection with the Merger, any related transactions or any other matters.

Interests of Cousins Directors and Executive Officers in the Merger (See page 139)

Pursuant to the Merger Agreement, at the effective time of the Merger, the Cousins board of directors will have nine members, including five directors, Mr. Taylor Glover, Mr. Larry Gellerstedt, Mr. Robert Chapman, Ms. Donna Hyland and Ms. Lillian Giornelli, designated by the Cousins board of directors prior to the effective time of the Merger, with Mr. Taylor Glover continuing as the chairman of the Cousins board of directors. In addition, at the effective time of the Merger, the New Parkway board of directors will have seven members, including three directors, Mr. R. Dary Stone, Mr. James H. Hance Jr. and Mr. Craig B. Jones, designated by the Cousins board of directors prior to the effective time of the Merger.

Pursuant to the Merger Agreement, at the effective time of the Merger, the senior leadership team of Cousins will include Mr. Larry Gellerstedt as president and chief executive officer, Mr. Gregg Adzema as executive vice president and chief financial officer, Mr. John McColl as executive vice president, Mr. Colin Connolly as executive vice president and chief operating officer, Ms. Pamela Roper as senior vice president, general counsel and corporate secretary and Mr. Jay Harris as senior vice president, chief accounting officer, treasurer and assistant corporate secretary. None of the senior leadership team of Cousins will hold positions with New Parkway following the Merger and the Spin-Off.

Interests of Parkway Directors and Executive Officers in the Merger (See page 139)

Pursuant to the Merger Agreement, at the effective time of the Merger, the Cousins board of directors will have nine members, including three directors, Ms. Brenda J. Mixson, Mr. Charles T. Cannada and Mr. Edward M. Casal, designated by the Parkway board of directors prior to the effective time of the Merger, and one director, Mr. Kelvin L. Davis, designated by TPG Pantera pursuant to the Cousins stockholders agreement (as hereinafter defined). For more information, see “The Merger—Agreements with the TPG Parties—Cousins Stockholders Agreement.” In addition, at the effective time of the Merger, the New Parkway board of directors will have seven members, including (i) two directors who were members of the Parkway board of directors as of April 28, 2016 (and not representatives of the TPG Parties), one of whom will be Mr. James A. Thomas, Parkway’s current chairman of the board, serving as chairman of the New Parkway board of directors, and the other of whom will be Mr. James R. Heistand, president and chief executive officer of New Parkway, and (ii) two directors, Mr. Avi Banyasz and Mr. Frank J. “Tripp” Johnson, designated by TPG Pantera pursuant to the New Parkway stockholders agreement (as hereinafter defined). For more information, see “The Merger—Agreements with the TPG Parties—New Parkway Stockholders Agreement.”

Parkway has entered into employment agreements with certain executive officers, pursuant to which such executive officers may become entitled to certain payments of benefits upon the consummation of a change in control and/or upon a related qualifying termination of employment. For more information, see “The Merger—Interests of Parkway Directors and Executive Officers in the Merger.”

In connection with the Merger, certain executive officers and directors of Parkway who own stock options, RSUs and LTIP Units of Parkway, in some cases, will have such securities converted into the right to receive options to purchase Cousins common stock, Cousins RSUs, Cousins common stock or common units of Parkway LP. For more information, see “The Merger—Interests of Parkway Directors and Executive Officers in the Merger—Treatment of Outstanding Equity Awards.”

None of the senior leadership team of New Parkway will hold positions with Cousins following the Merger and the Spin-Off.

In addition, concurrently with execution of the Merger Agreement, Parkway and Parkway LP entered into a letter agreement with Mr. Thomas and certain other unitholders of Parkway LP that are affiliated with Mr. Thomas (which we refer to as the “Thomas Investors”), pursuant to which Mr. Thomas will have certain interests in New Parkway that are different from, or in addition to, those of others stockholders, including with respect to certain governance rights, registration rights, and tax protection agreements. For more information, see “The Merger—Thomas Letter Agreement.”

Directors and Management Following the Merger (See page 147)

Pursuant to the Merger Agreement, and upon the terms and subject to the conditions of the Merger Agreement, at the effective time of the Merger, the Cousins board of directors will have nine members, with Mr. Taylor Glover continuing as the chairman of the Cousins board of directors. The Cousins board of directors at the effective time of the Merger will consist of five directors, Mr. Taylor Glover, Mr. Larry Gellerstedt, Mr. Robert Chapman, Ms. Donna Hyland and Ms. Lillian Giornelli, designated by the Cousins board of directors prior to the effective time of the Merger, three directors, Ms. Brenda J. Mixson, Mr. Charles T. Cannada and Mr. Edward M. Casal, designated by the Parkway board of directors prior to the effective time of the Merger and one director, Mr. Kelvin L. Davis, designated by TPG Pantera pursuant to the Cousins stockholders agreement (as hereinafter defined). For more information, see “The Merger—Agreements with the TPG Parties—Cousins Stockholders Agreement.”

Pursuant to the Merger Agreement, and upon the terms and subject to the conditions of the Merger Agreement, at the effective time of the Merger, the senior leadership team of Cousins will include Mr. Larry

Gellerstedt as president and chief executive officer, Mr. Gregg Adzema as executive vice president and chief financial officer, Mr. John McColl as executive vice president, Mr. Colin Connolly as executive vice president and chief operating officer, Ms. Pamela Roper as senior vice president, general counsel and corporate secretary and Mr. Jay Harris as senior vice president, chief accounting officer, treasurer and assistant corporate secretary. None of the senior leadership team of Cousins will hold positions with New Parkway following the Merger and the Spin-Off.

Pursuant to the Merger Agreement, and upon the terms and subject to the conditions of the Merger Agreement, at the effective time of the Merger, the New Parkway board of directors will have seven members. The New Parkway board of directors at the effective time of the Merger will consist of three directors, Mr. R. Dary Stone, Mr. James H. Hance Jr. and Mr. Craig B. Jones, designated by the Cousins board of directors prior to the effective time of the Merger, two directors, Mr. James A. Thomas and Mr. James R. Heistand, designated by the Parkway board of directors prior to the effective time of the Merger and two directors, Mr. Avi Banyasz and Mr. Frank J. “Tripp” Johnson, designated by TPG Pantera pursuant to the New Parkway stockholders agreement (as hereinafter defined). For more information, see “The Merger—Agreements with the TPG Parties—New Parkway Stockholders Agreement.”

On June 29, 2016, with respect to the designation of Mr. Craig B. Jones, Cousins and Parkway agreed to waive a requirement in the Merger Agreement that each of the directors appointed by Cousins to the New Parkway board of directors must have been a member of the Cousins board of directors as of April 28, 2016.

At the effective time of the Merger, the senior leadership team of New Parkway will include Mr. James R. Heistand as chief executive officer and other senior management of Parkway in key executive roles. Mr. James A. Thomas, the current chairman of the Parkway board of directors, will be the chairman of the New Parkway board of directors at the effective time of the Merger.

None of the senior leadership team of New Parkway will hold positions with Cousins following the Merger and the Spin-Off.

For more information, see “The Merger—Directors and Management Following the Merger” and “The Merger—Agreements with the TPG Parties.”

The Separation (See page 163)

Immediately following the effective time of the Merger, Cousins will effect the Separation, a series of reorganization transactions, on the terms and subject to the conditions of the Merger Agreement, pursuant to which Cousins will separate the Houston Business and the Third-Party Services Business from the remainder of the combined businesses.

The UPREIT Reorganization (See page 163)

In connection with the Merger and the Separation, Cousins and Parkway will reorganize their combined businesses through the UPREIT Reorganization such that, after the completion of the Merger, the Separation, the UPREIT Reorganization and the Spin-Off, both Cousins and New Parkway will operate as UPREITs. This means that substantially all of the properties of Cousins and Parkway will be held through an operating partnership of each company.

To that end, pursuant to the UPREIT Reorganization, Parkway has formed a new operating partnership, Cousins LP, through which Cousins will operate substantially all of its business after the effective time of the Merger.

Parkway currently operates as an UPREIT, through its operating partnership, Parkway LP. Pursuant to the UPREIT Reorganization, New Parkway LP will become the operating partnership of New Parkway, through which New Parkway will operate substantially all of its business after the effective time of the Spin-Off.

The Spin-Off (See page 166)

New Parkway’s charter will provide for three classes of stock: voting common stock, nonvoting preferred stock and limited voting stock. After the Separation and the UPREIT Reorganization, in the Spin-Off, Cousins will distribute (1) pro rata to its common stockholders, including legacy Cousins common stockholders and legacy Parkway common stockholders, all of the outstanding shares of common stock of New Parkway and (2) pro rata to its limited voting stockholders, which are composed of legacy Parkway limited voting stockholders, all of the outstanding shares of limited voting stock of New Parkway. The Spin-Off will occur on the first business day following the closing of the Merger. Cousins, or a subsidiary of Cousins, will retain all of the nonvoting preferred stock of New Parkway, upon the terms and subject to the conditions of the Merger Agreement. New Parkway is expected to have outstanding shares of preferred stock with a liquidation preference of $5 million, a fixed market-rate dividend and no voting rights, other than as required by law.

Cousins and Parkway will enter into all agreements necessary to effect the Spin-Off, including a Separation and Distribution Agreement (as hereinafter defined), in each case, on the terms and subject to the conditions of the Merger Agreement.

Continuing holders of shares of Cousins common stock will be entitled to receive one share of New Parkway common stock for each share of Cousins common stock held by such stockholder as of the close of business on the record date of the Spin-Off. Legacy holders of shares of Parkway common stock who, as of the close of business on the record date of the Spin-Off, continue to hold the Cousins shares they received in the Merger will be entitled to receive 1.63 shares of New Parkway common stock for each share of Parkway common stock held by such stockholders immediately prior to the effective time of the Merger. In addition, each limited partner of Parkway LP that does not redeem or exchange its partnership interests for shares of Parkway common stock in connection with the Merger will retain its limited partnership interests in Parkway LP and receive pro rata limited partnership interests in Cousins LP in connection with the Separation, the UPREIT Reorganization and the Spin-Off.

Legacy holders of shares of Parkway limited voting stock who, as of the close of business on the record date of the Spin-Off, continue to hold the Cousins shares they received in the Merger will be entitled to receive 1.63 shares of New Parkway limited voting stock for each share of Parkway limited voting stock held by such stockholders immediately prior to the effective time of the Merger. Under the articles of incorporation of New Parkway, the terms of the New Parkway limited voting stock will be substantially identical to the terms of the Cousins limited voting preferred stock, as set forth in Exhibit E to the Merger Agreement.

If necessary to comply with NYSE listing standards or otherwise, Cousins and Parkway may reduce the number of shares of New Parkway common stock and limited voting stock issued in the Spin-Off in respect of Cousins common stock and limited voting preferred stock through a change to the distribution ratio for the Spin-Off.

Upon completion of the Merger, the Separation, the UPREIT Reorganization and the Spin-Off, we estimate that legacy Cousins common stockholders will own approximately 53% of the common stock of each of Cousins and New Parkway, and legacy Parkway stockholders will own approximately 47% of the common stock of each of Cousins and New Parkway. Legacy holders of Parkway limited voting stock will own 100% of each of the Cousins limited voting preferred stock and the New Parkway limited voting stock.

Accounting Treatment (See page 149)

Cousins and Parkway prepare their financial statements, respectively, in accordance with accounting principles generally accepted in the United States (which we refer to as “GAAP”). The Merger will be accounted for by applying the purchase method of accounting, with Cousins treated as the acquirer. For more information, see “The Merger—Accounting Treatment.”

Regulatory Approvals (See page 149)

In connection with the issuance of Cousins common stock in the Merger, pursuant to the Merger Agreement, as a condition to the closing of the Merger, Cousins must file a registration statement with the SEC under the Securities Act, of which this joint proxy statement/prospectus forms a part, that is declared effective by the SEC. As a condition to the closing of the Merger, New Parkway must file the New Parkway Form 10, and the New Parkway Form 10 must be declared effective by the SEC, with no stop order in effect with respect to the New Parkway Form 10 and no proceedings for such purpose pending or threatened by the SEC.

Closing; Effective Time of the Merger (See page 153)

Cousins and Parkway are working to complete the Merger and the Spin-Off in the fourth quarter of 2016. However, the Merger and the Spin-Off are subject to various conditions, and it is possible that factors outside the control of both companies could result in the Merger and the Spin-Off being completed at a later time, or not at all. There may be a substantial amount of time between the respective Cousins and Parkway special meetings and the completion of the Merger and the Spin-Off. Cousins and Parkway hope to complete the Merger and the Spin-Off as soon as reasonably practicable following the satisfaction of all applicable conditions. For more information, see “Risk Factors—Risks Relating to the Merger.”

The Merger is expressly conditioned on the readiness of the Spin-Off and the effectiveness of the New Parkway Form 10, on which securities to be distributed in the Spin-Off will be registered. This may further delay consummation of the Merger.

Cousins stockholders and Parkway stockholders are not being asked to take any action relating to the Separation, the UPREIT Reorganization or the Spin-Off.

Conditions to Completion of the Merger (See pages 173)

As more fully described in this joint proxy statement/prospectus and in the Merger Agreement, the completion of the Merger depends on a number of conditions being satisfied or, where legally permissible, waived. These conditions include:

We cannot be certain when, or if, the conditions to the Merger will be satisfied or waived, or that the Merger will be completed.

As more fully described in this joint proxy statement/prospectus and in the Merger Agreement, the completion of the Spin-Off depends on a number of conditions being satisfied or, where legally permissible, waived. These conditions include:

No Solicitation (See page 174)

Cousins and Parkway are subject to a customary “no-shop” provision that requires them to refrain from, and to cease discussions or solicitations with respect to, alternate transactions and subjects them to certain restrictions in considering and negotiating alternate transactions. If either of the parties receives a superior proposal (as hereinafter defined), the receiving party may provide nonpublic information to the proposing party and engage in discussions or negotiations with the party making such a proposal. Each party shall promptly notify the other party of any proposal for an alternative transaction within 24 hours and provide the other party with a copy of such proposal.

In response to a superior proposal, the board of directors of the party receiving such a proposal may change its recommendation with respect to such party’s stockholder vote, and such party may terminate the Merger Agreement in order to accept such proposal. Prior to effecting such change, the board of directors of the party receiving the superior proposal must provide the other party with notice, reasons for such action and five days of good-faith negotiations to counter such proposal.

Termination of the Merger Agreement (See page 177)

The Merger Agreement may be terminated prior to the effective time of the Merger, whether before or after the required approvals of the Cousins stockholders and Parkway stockholders are obtained:

Expenses and Termination Fees (See page 178)

Generally, all fees and expenses incurred in connection with the Merger and the transactions contemplated by the Merger Agreement will be paid by the party incurring those expenses. For more information, see “The Merger—The Merger Agreement—Fees and Expenses.” The Merger Agreement further provides that, upon termination of the Merger Agreement under certain circumstances, each party may be obligated to pay the other party a termination fee of $65 million and either party may be obligated to reimburse $20 million of the expenses of the other party. For more information, see “The Merger—The Merger Agreement—Termination of the Merger Agreement.”

No Appraisal or Dissenters’ Rights (See page 151)

Under Maryland and Georgia law, the holders of Parkway common and limited voting stock and Cousins common stock, respectively, are not entitled to appraisal rights in connection with the Merger. For more information, see “The Merger—No Appraisal or Dissenters’ Rights.”

Agreements with the TPG Parties (See page 180)

Concurrently with the execution of the Merger Agreement, Cousins entered into a voting agreement with the TPG Parties, pursuant to which the TPG Parties agreed to vote all of their shares of Parkway common stock in favor of the Parkway Merger Proposal and the other actions contemplated by the Merger Agreement and against actions or agreements that would reasonably be expected to result in the failure of a closing condition set forth in the Merger Agreement, alternative acquisitions, any action that would reasonably be expected to materially delay, materially postpone or materially adversely affect the consummation of the transactions contemplated by the Merger or would dilute in any material respect the benefit of such transactions to Cousins or its stockholders. As of April 28, 2016, the TPG Parties held 23,663,397 shares of Parkway common stock, or approximately 21.2% of the common stock issued and outstanding.

Concurrently with the execution of the Merger Agreement, Cousins entered into a stockholders agreement with the TPG Parties (which we refer to as the “Cousins stockholders agreement”) in order to establish various arrangements with respect to governance of Cousins after the effective time of the Merger and certain rights with respect to shares of Cousins common stock which will be beneficially owned by the TPG Parties following the effective time of the Merger. Effectiveness of the Cousins stockholders agreement is conditioned on the closing of the Merger.

Pursuant to the Cousins stockholders agreement, upon the terms and subject to the conditions thereof, TPG Pantera will have the right to nominate one director for inclusion on the Cousins board of directors and certain of its committees so long as TPG Pantera (together with its affiliates, other than portfolio companies of TPG Pantera or its affiliates) beneficially owns at least 5% of outstanding shares of Cousins common stock. The

agreement will also grant the TPG Parties certain registration rights, and will subject TPG Pantera and its affiliates (other than portfolio companies of TPG Pantera or its affiliates) and any non-private equity business of any of TPG Pantera’s affiliates to a standstill that will allow TPG Pantera or such affiliates to acquire up to 15% of the outstanding shares of Cousins common stock, subject to the terms and upon the conditions of the Cousins stockholders agreement.

In addition, in connection with the Merger Agreement, the Cousins board of directors granted to the TPG Parties an exemption from the ownership limit included in the Cousins Articles, establishing for the TPG Parties an aggregate substitute in lieu of the ownership limit to permit them to constructively and beneficially own (without duplication) (i) during the term of the standstill provided by the Cousins stockholders agreement, up to 15% of Cousins’ outstanding voting securities, subject to the terms and conditions thereof, and (ii) following the term of the standstill provided by the Cousins stockholders agreement, shares of Cousins common stock held by the TPG Parties at the expiration of the standstill, subject to the terms, conditions, limitations, reductions and terminations set forth in an executed investor representation letter to be entered into prior to the effective time of the Merger.

In addition, at the effective time of the Merger, New Parkway will enter into a stockholders agreement with the TPG Parties (which we refer to as the “New Parkway stockholders agreement”), pursuant to which TPG Pantera will have the right to nominate two directors to the New Parkway board of directors for so long as TPG Pantera (together with its affiliates, other than portfolio companies of TPG Pantera or its affiliates) beneficially owns at least 5% of New Parkway common stock (or up to three directors if they beneficially own at least 30% of New Parkway common stock) and one director to the New Parkway board of directors for so long as TPG Pantera (together with its affiliates, other than portfolio companies of TPG Pantera or its affiliates) own at least 2.5% of New Parkway common stock. The agreement will also grant the TPG Parties certain registration and preemptive rights.

For more information, see “The Merger—Agreements with the TPG Parties.”

Thomas Letter Agreement (See Page 183)

Concurrently with the execution of the Merger Agreement, Parkway and Parkway LP entered into the Thomas Letter Agreement with the chairman of the Parkway board of directors, Mr. James A. Thomas, and certain unitholders of Parkway LP who are affiliated with Mr. Thomas (together with Mr. Thomas, the “Thomas Parties”). The Thomas Letter Agreement supplements and amends an existing letter agreement among the parties relating to certain governance rights of Mr. Thomas, certain tax protection arrangements, and registration rights. The Thomas Letter Agreement will be binding on New Parkway and the successor to Parkway LP following the Merger and the Spin-Off, and, in general, will not be binding upon Cousins, Cousins LP or any of their subsidiaries.

Agreements to be Entered into in Connection with the Merger, the Separation and the UPREIT Reorganization (See page 184)

Prior to the effective time of the Merger, Parkway, as general partner of Cousins LP, and Parkway LP, as limited partner of Cousins LP, will execute the partnership agreement of Cousins LP which, immediately following the effective time of the Merger, will be amended and restated by Cousins as general partner and certain persons as limited partners. Cousins LP will function as the operating partnership of Cousins and will allow Cousins to operate as an UPREIT following the Merger and the UPREIT Reorganization.

In addition, immediately following the Spin-Off, New Parkway, as holder of the majority in interest of the limited partnership units of Parkway LP, and Parkway Properties General Partners, Inc., a Delaware corporation (which we refer to as “Parkway GP”), as general partner of Parkway LP, will enter into an amendment to the

Parkway Partnership Agreement. Parkway LP will hold, as its sole asset, an approximately 47.5% limited partner interest in New Parkway LP. New Parkway LP will function as the operating partnership of New Parkway and will allow New Parkway to operate as an UPREIT following consummation of the Merger, the Separation, the UPREIT Reorganization and the Spin-Off.

Material U.S. Federal Income Tax Consequences of the Merger (See page 196)

The Merger is intended to be non-taxable to stockholders, provided it qualifies as a “reorganization” within the meaning of Section 368(a) of the Code. U.S. holders of Parkway common stock are not expected to recognize any gain or loss for U.S. federal income tax purposes on the receipt of shares of Cousins common stock in exchange for Parkway common stock in the Merger, except with respect to any cash received in lieu of fractional shares of Cousins common stock. The obligations of Parkway and Cousins to complete the Merger are subject to, among other conditions described in this joint proxy statement/prospectus, the receipt by each of Parkway and Cousins of the opinion of its counsel to the effect that the Merger will qualify as a “reorganization” within the meaning of Section 368(a) of the Code.

You should read “Material U.S. Federal Income Tax Consequences—Material U.S. Federal Income Tax Consequences of the Merger” for a more complete discussion of the U.S. federal income tax considerations relevant to the Merger. The tax consequences of the Merger to you will depend on your particular tax situation. You should consult your tax advisor to determine the particular tax consequences of the Merger to you.

Material U.S. Federal Income Tax Consequences of the Spin-Off to U.S. Stockholders (See page 197)

While the Merger generally is not expected to result in the recognition of gain or loss for stockholders of either Parkway or Cousins, the distribution of shares of New Parkway common stock in the Spin-Off will be treated as a taxable distribution to Cousins stockholders for U.S. federal income tax purposes. An amount equal to the fair market value of the shares of New Parkway common stock received by Cousins stockholders in the Spin-Off will generally be treated as a taxable dividend to the extent of your ratable share of any current or accumulated earnings and profits of Cousins (including gain recognized by Cousins in connection with the Separation and the Spin-off), with the excess treated first as a non-taxable return of capital to the extent of your tax basis in Cousins common stock and any remaining excess treated as capital gain.

The particular consequences of the Spin-Off to each Cousins stockholder depend on such holder’s particular facts and circumstances, and thus you are urged to consult your tax advisor to understand fully the consequences to you of the Spin-Off in your specific circumstances. For more information, see “Material U.S. Federal Income Tax Consequences of the Spin-Off to U.S. Stockholders.”

The Cousins Special Meeting (See page 199)

The Cousins special meeting will be held at 191 Peachtree Street NE, Suite 500, Atlanta Georgia 30303, at 2:00 PM EDT, on August 23, 2016. You may vote at the Cousins special meeting if you owned shares of Cousins common stock at the close of business on July 15, 2016, the record date for the Cousins special meeting. On that date, there were 220,498,824 shares of Cousins common stock outstanding and entitled to vote. You may cast one vote for each share of Cousins common stock that you owned on that date.

At the Cousins special meeting, Cousins stockholders will be asked to consider and vote upon:

The approval of the Cousins Issuance Proposal and the Cousins Articles Amendment Proposal is a condition to the completion of the Merger.

The Cousins Issuance Proposal requires approval by the affirmative vote of the majority of the votes cast by Cousins common stockholders, assuming a quorum is present. The Cousins Articles Amendment Proposal requires approval by the affirmative vote of the holders of a majority of the outstanding shares of Cousins common stock, assuming a quorum is present. The Cousins Adjournment Proposal requires approval by the affirmative vote of holders of a majority of the Cousins common stock represented, in person or by proxy, at the Cousins special meeting and entitled to vote on the proposal, whether or not a quorum is present.

On the record date, approximately 3.17% of the outstanding shares of Cousins common stock was held by Cousins directors and executive officers and their affiliates. Cousins currently expects that the Cousins directors and executive officers will vote their shares in favor of the Cousins Issuance Proposal, the Cousins Articles Amendment Proposal and the Cousins Adjournment Proposal, although none has entered into any agreements obligating them to do so.

The Cousins board of directors unanimously recommends that Cousins stockholders vote “FOR” all of the proposals set forth above. For more information, see “The Cousins Special Meeting.”

Cousins stockholders do not need to take any action at the Cousins special meeting relating to the Separation, the UPREIT Reorganization or the Spin-Off. The Separation, the UPREIT Reorganization and the Spin-Off will only occur if the Merger is completed.

The Parkway Special Meeting (See page 206)

The Parkway special meeting will be held at 3344 Peachtree Road NE, Atlanta, Georgia 30326, at 2:00 PM EDT on August 23, 2016. You may vote at the Parkway special meeting if you owned Parkway common or limited voting stock at the close of business on July 15, 2016, the record date for the Parkway special meeting. On that date, there were 111,768,031 shares of Parkway common stock outstanding and entitled to vote and 4,213,104 shares of Parkway limited voting stock outstanding and entitled to vote. Each share of Parkway common stock is entitled to cast one vote on all matters that come before the Parkway special meeting. Each share of Parkway limited voting stock is entitled to cast one vote on the Parkway Merger Proposal only and shall vote as a single class with the holders of Parkway common stock on such proposal.

At the Parkway special meeting, stockholders of Parkway will be asked to consider and vote upon:

The approval of the Parkway Merger Proposal requires the affirmative vote of the holders of a majority of the outstanding shares of Parkway common and limited voting stock, voting together as a single class. The approval of the Parkway Compensation Proposal requires the affirmative vote of the holders of a majority of the votes cast by holders of Parkway common stock, assuming a quorum is present. The Parkway Adjournment Proposal requires the affirmative vote of the holders of a majority of the votes cast by holders of Parkway common stock, assuming a quorum is present. If a quorum is not present, the holders of a majority of Parkway common stock present in person or by proxy at the Parkway special meeting may adjourn the meeting.

On the record date, approximately 7.9% of the outstanding shares of Parkway common stock was held by Parkway directors and executive officers and their affiliates. On the record date, 100% of the outstanding shares

of Parkway limited voting stock were held by a director of Parkway and his affiliates. Parkway currently expects that the directors and executive officers of Parkway will vote their shares in favor of the Parkway Merger Proposal, the Parkway Compensation Proposal and the Parkway Adjournment Proposal, although none has entered into any agreements obligating them to do so. In addition, the TPG Parties, who currently have the right to designate up to four directors on the Parkway board of directors, have entered into a voting agreement with Cousins pursuant to which they have agreed to vote all of their shares of Parkway common stock in favor of the Parkway Merger Proposal. For more information, see “The Merger—Agreements with the TPG Parties—Voting Agreement.”

The Parkway board of directors unanimously recommends that Parkway stockholders vote “FOR” all of the proposals set forth above. For more information, see “The Parkway Special Meeting.”

Parkway stockholders do not need to take any action at the Parkway special meeting relating to the Separation, the UPREIT Reorganization or the Spin-Off. The Separation, the UPREIT Reorganization and the Spin-Off will only occur if the Merger is completed.

Business and Properties—New Parkway (See page 274)

General (See page 274)

New Parkway will be a self-managed office REIT, engaged in the ownership, acquisition, development and leasing of Class A office properties focused on attractive Houston, Texas submarkets. Upon completion of the Separation, its portfolio will consist of five Class A assets comprising 19 buildings and totaling approximately 8.7 million rentable square feet in the Greenway, Galleria and Westchase submarkets of Houston, providing geographic focus and significant operational scale and efficiencies. New Parkway believes that the creation of a geographically focused REIT with a strong balance sheet and targeted internal value-creation opportunities will generate attractive risk-adjusted returns for its stockholders while providing a platform for external growth opportunities over the longer term.

New Parkway’s mission will be to own and operate high-quality office properties located in attractive submarkets in Houston, with a primary focus on unlocking value within its existing portfolio through implementing active and creative leasing strategies, leveraging its scale to increase pricing power in lease and vendor negotiations and targeting redevelopment and asset repositioning opportunities. New Parkway expects to maintain a conservative balance sheet with low leverage and ample liquidity, which New Parkway expects will allow it to access multiple sources of capital. New Parkway believes that this strategy will support both its internal growth initiatives and its patient and disciplined approach to pursuing new investment opportunities at the appropriate times. New Parkway believes this strategy, combined with its highly experienced management team that has a successful history of operating a publicly traded REIT, significant expertise in the Houston, Texas office sector and extensive relationships with industry participants, positions it for long-term external and internal growth.

Competitive Strengths (See page 274)

Accomplished management team with a demonstrated track record of acquiring, operating and repositioning assets and managing a public office REIT. New Parkway’s management team, led by Mr. James R. Heistand, will have extensive experience in the office real estate industry, including in the operations, leasing, acquisition and disposition of office assets through all stages of the real estate cycle, and will have a proven track record of executing business strategies and delivering strong results for stockholders. Since joining Parkway in the fourth quarter of 2011 through March 31, 2016, this management team has acquired $3.9 billion of high-quality, Class A office assets and disposed of approximately $2.6 billion of non-core assets resulting in approximately $290.0 million of net gains. During this time, this management team also realized significant portfolio-wide operational improvements as evidenced by a 45.8% increase in average in-place rents and an increase in the leased percentage of the portfolio from 84.9% to 90.8%.

Houston focus with local and regional expertise. New Parkway will focus on owning and operating office properties in Houston, Texas, which is a region New Parkway believes is well-positioned for economic recovery. New Parkway believes its position as a “pure-play” Houston real estate company allows it to have a targeted focus on property performance that otherwise could be diluted in a company with more geographically diverse holdings. Additionally, New Parkway’s management and property-level teams have in-depth knowledge of the Houston real estate market and an extensive network of long-standing relationships with leading local and regional industry participants that New Parkway believes will drive its ability to identify and capitalize on internal and external value-creation opportunities and attractive acquisition opportunities as well as identify opportunities with potential joint venture partners, as such opportunities arise from time to time, which may include preliminary conceptual discussions prior to the closing of the Merger.

High-quality portfolio of Class-A office assets concentrated in desirable, resilient Houston submarkets. New Parkway will own five Class A assets comprising 19 buildings and totaling approximately 8.7 million square feet in the Greenway, Galleria and Westchase submarkets, which are among the most desirable submarkets in Houston. New Parkway expects to be the largest landlord in each of these submarkets, owning 72% of the Class A office inventory in Greenway, 18% in Galleria, and 17% in Westchase based on square footage as of March 31, 2016.

High-quality, creditworthy customer base with limited near-term lease maturities. New Parkway’s diversified customer base will generally consist of high-quality and creditworthy customers. As of March 31, 2016, nearly 50% of New Parkway’s customers based on annual base rent had investment grade credit ratings from major credit rating agencies. Further, with a weighted average remaining lease term of approximately six years as of March 31, 2016, New Parkway’s portfolio will have limited near-term lease maturities, which New Parkway believes will provide stable cash flows with minimal decline in contractual revenue over the next several years.

Flexible and conservative capital structure. New Parkway believes its flexible and conservative capital structure will provide it with an advantage over many of its private and public competitors. Upon completion of the Distribution, New Parkway will have limited near-term debt maturities, approximately $150 million in cash and cash equivalents and $50 million of additional liquidity, all of which will provide financial flexibility, support ongoing capital improvement needs and reinforce its business and growth strategies of unlocking the value in its portfolio through leasing and asset repositioning.

Business and Growth Strategies (see page 276)

Maximize cash flow growth and value through proactive asset management and leasing. New Parkway believes it is well-positioned to drive growth in cash flow and maximize the value of its portfolio with proactive, creative and aggressive leasing and asset management. New Parkway believes that it will be able to leverage its broad existing customer relationships, leading market position and deep financial flexibility to attract new, high-quality customers, increase occupancy over the long-term and maximize customer retention rates at its properties.

Focus on unlocking value through repositioning and redeveloping existing properties. New Parkway expects that its management team will devote attention to internal value-creating investment opportunities that are intended to generate attractive growth in revenues and cash flow, enhancing the value of its portfolio. Specifically, New Parkway expects to leverage its real estate expertise to reposition and redevelop its existing properties, as well as properties that New Parkway may acquire in the future, with the objective of increasing occupancy, rental rates and risk-adjusted returns on its invested capital.

Maintain a conservative, flexible balance sheet with adequate liquidity to fund near-term growth opportunities. New Parkway will maintain a conservative capital structure that will provide resources and

flexibility to position it for both internal and external growth. New Parkway will focus on maintaining sufficient liquidity with minimal short-term debt maturities, allowing it to pursue value enhancement strategies within its portfolio and to support acquisition activities as they may arise from time to time. Initially, New Parkway expects to maintain a mix of property-level secured indebtedness as well as corporate debt secured by a pool of assets.

Pursue acquisitions with a patient, prudent approach. While New Parkway’s initial focus will be to unlock internal embedded growth in its existing portfolio, New Parkway intends to take advantage of current and future market dislocation in Houston to capitalize on emerging acquisition opportunities within New Parkway’s current submarkets as well as other Houston submarkets, if such assets meet its investment criteria.

New Parkway’s Portfolio (see page 277)

New Parkway’s portfolio will consist of five Class A office assets located in the Galleria, Greenway and Westchase submarkets in Houston, Texas, comprising 19 buildings and totaling approximately 8.7 million square feet. As of March 31, 2016, its portfolio had an occupancy rate of 86.0%.

The following table sets forth the occupancy rates by property for New Parkway’s portfolio as of March 31, 2016:

Top 20 Customers (see page 277)

As of March 31, 2016, New Parkway’s top 20 customers (identified by industry) based on annualized rent are as follows:

Rights of Parkway Stockholders Will Change as a Result of the Merger (See page 289)

Parkway stockholders will have different rights once they become stockholders of Cousins, due to differences between the governing documents of Cousins and Parkway. These differences are described in detail under “Comparison of Rights of Cousins Stockholders and Parkway Stockholders.”

In addition, in connection with the Spin-Off, New Parkway stockholders will have different rights under New Parkway’s articles of incorporation and bylaws once they become stockholders of New Parkway.

SELECTED HISTORICAL FINANCIAL DATA—COUSINS

The following tables set forth selected consolidated financial information for Cousins as of and for each of the five years ended December 31, 2015, 2014, 2013, 2012 and 2011 and as of and for each of the three months ended March 31, 2016 and 2015. All references to “fiscal years,” unless otherwise noted, refer to the twelve-month fiscal year.

The selected consolidated financial information for Cousins as of December 31, 2015 and 2014 and for the years ended December 31, 2015, 2014 and 2013 was derived from the audited consolidated financial statements of Cousins contained in Cousins’ Annual Report on Form 10-K filed with the SEC on February 10, 2016, which is incorporated by reference into this joint proxy statement/prospectus. The summary consolidated financial data as of December 31, 2013, 2012 and 2011, and for the years ended December 31, 2012 and 2011, were derived from Cousins’ audited consolidated financial statements not included or incorporated by reference into this joint proxy statement/prospectus.

The selected historical financial information as of March 31, 2016 and for each of the three-month periods ended March 31, 2016 and March 31, 2015 was derived from Cousins’ unaudited consolidated financial statements as of and for the quarter ended March 31, 2016 contained in Cousins’ Quarterly Report on Form 10-Q for the quarter ended March 31, 2016, filed with the SEC on May 4, 2016, which is incorporated by reference into this joint proxy statement/prospectus. The selected historical financial information as of March 31, 2015 was derived from unaudited consolidated financial statements not included or incorporated by reference into this joint proxy statement/prospectus.

The following information should be read together with the consolidated financial statements of Cousins, the notes related thereto and the related reports of management on the financial condition and performance of Cousins, all of which are contained in the reports of Cousins filed with the SEC and incorporated herein by reference. For more information, see “Where You Can Find More Information.”

SELECTED HISTORICAL FINANCIAL DATA—PARKWAY

The following tables set forth selected consolidated financial information for Parkway as of and for each of the five years ended December 31, 2015, 2014, 2013, 2012 and 2011 and as of and for each of the three months ended March 31, 2016 and March 31, 2015. All references to “fiscal years,” unless otherwise noted, refer to the twelve-month fiscal year.

The selected consolidated financial information for Parkway as of December 31, 2015 and 2014 and for the years ended December 31, 2015, 2014 and 2013 was derived from the consolidated financial statements of Parkway, contained in Parkway’s Annual Report on Form 10-K filed with the SEC on February 25, 2016, which is incorporated by reference into this joint proxy statement/prospectus. The summary consolidated financial data as of December 31, 2013, 2012 and 2011, and for the years ended December 31, 2012 and 2011, were derived from Parkway’s audited consolidated financial statements not included or incorporated by reference into this joint proxy statement/prospectus.

The selected historical financial information as of March 31, 2016 and for each of the three-month periods ended March 31, 2016 and March 31, 2015 was derived from Parkway’s unaudited consolidated financial statements as of and for the quarter ended March 31, 2016, contained in Parkway’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2016, filed with the SEC on May 5, 2016, which is incorporated by reference into this joint proxy statement/prospectus. The selected historical financial information as of March 31, 2015 was derived from unaudited consolidated financial statements not included or incorporated by reference into this joint proxy statement/prospectus.

The following information should be read together with the consolidated financial statements of Parkway, the notes related thereto, and the related reports of management on the financial condition and performance of Parkway, all of which are contained in the reports of Parkway filed with the SEC and incorporated herein by reference. For more information, see “Where You Can Find More Information.”