Exhibit 99.4

NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR REASONABLY ACCEPTABLE TO THE COMPANY TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY.

COMMON STOCK PURCHASE WARRANT AND REGISTRATION RIGHTS

To Purchase 1,000,000 Shares

of Common Stock of

LANDMARK LAND COMPANY, INC.

THIS COMMON STOCK PURCHASE WARRANT AND REGISTRATION RIGHTS (the “Warrant”) CERTIFIES that, for value received, PRIME FINANCIAL, LLC, an Oklahoma limited liability company (the “Holder”), is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the Closing Date (the “Initial Exercise Date”) until on or prior to the date of the funding and Closing of the Put Option Property following the Holder’s exercise of one or both of the Put Options (the “Termination Date”) but not thereafter, to subscribe for and purchase from Landmark Land Company, Inc., a Delaware corporation (the “Company”), up to 1,000,000 shares (the “Warrant Shares”) of common stock, par value $.50 per share, of the Company. The purchase price of each share of common stock (the “Exercise Price”) under the Warrant is $1.00, subject to adjustment hereunder. The Exercise Price and the number of the Warrant Shares for which the Warrant is exercisable shall be subject to adjustment as provided herein. The Warrant shall be subject to, and the capitalized terms used and not otherwise defined herein shall have the meanings set forth in, that certain Real Estate Purchase Agreement (the “Purchase Agreement”), dated September 8, 2011, between, the Company, the Holder, South Padre Island Development, LLC, a Delaware limited liability company, Gerald G. Barton and Jack E. Golsen.

1. Title to Warrant. On or prior to the Termination Date and subject to compliance with the terms of the Warrant, the Warrant and all rights hereunder are transferable, in whole or in part, at the office or agency of the Company by the Holder in person or by duly authorized attorney, upon surrender of the Warrant together with the Assignment Form annexed hereto properly endorsed; provided, however, that the assignee is an accredited investor, as such term is defined in Rule 501 promulgated under the Securities Act of 1933, as amended (the Securities Act”). The transferee shall be subject to the terms of the Warrant.

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2. Authorization of Shares. The Company covenants that all of the Warrant Shares which may be issued upon the exercise of the Warrant will, upon exercise of the Warrant, be duly authorized, validly issued, fully paid and nonassessable and free from all taxes, liens and charges in respect of the issue thereof (other than taxes in respect of any transfer occurring contemporaneously with such issue).

3. Exercise of Warrant.

The Warrant will be deemed to have been exercised (the “Exercise Date”) on the later of (x) the date the Notice of Exercise is delivered to the Company by facsimile copy and (y) the date the Exercise Price is received by the Company.

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4. No Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of the Warrant. As to any fraction of a share which Holder would otherwise be entitled to purchase upon such exercise, the Company shall pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Exercise Price.

5. Transfer, Division and Combination.

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6. No Rights as Shareholder until Exercise. The Warrant does not entitle the Holder to any voting rights or other rights as a shareholder of the Company prior to the exercise hereof. The Warrant Shares shall be deemed to have been issued, and Holder or any other person so designated to be named therein shall be deemed to have become a holder of record of such shares for all purposes, as of the close of business on the Exercise Date.

7. Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of the Warrant or any stock certificate relating to the Warrant Shares, and in case of loss, theft, or destruction of indemnity or security reasonably satisfactory to it (which, in the case of the Warrant, shall not include the posting of any bond), and upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation, in lieu of such Warrant or stock certificate.

8. Saturdays, Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right required or granted herein shall be a Saturday, Sunday or a legal holiday, then such action may be taken or such right may be exercised on the next succeeding day not a Saturday, Sunday or legal holiday.

9. Adjustments of Exercise Price and the Warrant Shares. The number and kind of securities purchasable upon the exercise of the Warrant and the Exercise Price shall be subject to adjustment from time to time upon the happening of any of the following. If the Company:

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then the number of the Warrant Shares purchasable upon exercise of the Warrant immediately prior thereto shall be adjusted so that the Holder shall be entitled to receive the kind and number of the Warrant Shares or other securities of the Company which it would have owned or have been entitled to receive had such Warrant been exercised in advance thereof. Upon each such adjustment of the kind and number of the Warrant Shares or other securities of the Company which are purchasable hereunder, the Holder shall thereafter be entitled to purchase the number of the Warrant Shares or other securities resulting from such adjustment at an Exercise Price per Warrant Share or other security obtained by multiplying the Exercise Price in effect immediately prior to such adjustment by the number of the Warrant Shares purchasable pursuant hereto immediately prior to such adjustment and dividing by the number of the Warrant Shares or other securities of the Company that are purchasable pursuant hereto immediately after such adjustment. An adjustment made pursuant to this paragraph shall become effective immediately after the effective date of such event retroactive to the record date, if any, for such event.

10. Reorganization, Reclassification, Merger, Consolidation or Disposition of Assets. If the Company shall reorganize its capital, reclassify its capital stock, consolidate or merge with or into another corporation (where the Company is not the surviving corporation), or sell, transfer or otherwise dispose of all or substantially all of its property, assets or business to another corporation and, pursuant to the terms of such reorganization, reclassification, merger, consolidation or disposition of assets, shares of common stock of the successor or acquiring corporation, or any cash, shares of stock or other securities or property of any nature whatsoever (including warrants or other subscription or purchase rights) in addition to or in lieu of common stock of the successor or acquiring corporation (“Other Property”), are to be received by or distributed to the holders of common stock of the Company, then the Holder shall have the right thereafter to receive. upon exercise of the Warrant, the number of shares of common stock of the successor or acquiring corporation or of the Company, if it is the surviving corporation, and such Other Property receivable upon or as a result of such reorganization, reclassification, merger, consolidation or disposition of assets by a Holder of the number of shares of common stock for which the Warrant is exercisable immediately prior to such event. In case of any such reorganization, reclassification, merger, consolidation or disposition of assets, the successor or acquiring corporation (if other than the Company) shall expressly assume the due and punctual observance and performance of each and every covenant and condition of the Warrant to be performed and observed by the Company and all the obligations and liabilities hereunder, subject to such modifications as may be deemed appropriate (as determined in good faith by resolution of the Board of Directors of the Company) in order to provide for adjustments of the Warrant Shares for which the Warrant is exercisable which shall be as nearly equivalent as practicable to the adjustments provided for in this paragraph 10. For purposes of this paragraph 10, “common stock of the successor or acquiring corporation” shall include stock of such corporation of any class which is not preferred as to dividends or assets over any other class of stock of such corporation and which is not subject to redemption and shall also include any evidences of indebtedness, shares of stock or other securities which are convertible into or exchangeable for any such stock, either immediately or upon the arrival of a specified date or the happening of a

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specified event and any warrants or other rights to subscribe for or purchase any such stock. The foregoing provisions of this paragraph 10 shall similarly apply to successive reorganizations, reclassifications, mergers, consolidations or disposition of assets.

11. Voluntary Adjustment by the Company. The Company may at any time during the term of the Warrant reduce the then current Exercise Price to any amount and for any period of time deemed appropriate by the Board of Directors of the Company, but not below the par value of the common stock of the Company.

12. Notice of Adjustment. Whenever the number of the Warrant Shares or number or kind of securities or Other Property purchasable upon the exercise of the Warrant or the Exercise Price is adjusted, as herein provided, the Company shall give notice thereof to the Holder, which notice shall state the number of the Warrant Shares (and other securities or Other Property) purchasable upon the exercise of the Warrant and the Exercise Price of such Warrant Shares (and other securities or Other Property) after such adjustment, setting forth a brief statement of the facts requiring such adjustment and setting forth the computation by which such adjustment was made.

13. Authorized Shares. The Company covenants that during the period the Warrant is outstanding, it will reserve from its authorized and unissued shares of common stock a sufficient number of shares to provide for the issuance of the Warrant Shares upon the exercise of the Warrant. The Company further covenants that its issuance of the Warrant shall constitute full authority to its officers who are charged with the duty of executing stock certificates to execute and issue the necessary certificates for the Warrant Shares upon the exercise of the purchase rights under the Warrant. The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided herein without violation of any applicable law or regulation, or of any requirements of the trading market upon which the common stock may be listed.

14. Registration Rights. As long as the Warrant or any of the Warrant Shares may be outstanding, the Company shall:

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registered, by inclusion of such Warrant Shares in the registration statement which covers the securities which the Company proposes to register, provided that if, at any time after giving written notice of its intention to register any securities and prior to the effective date of the registration statement filed in connection with such registration, the Company shall determine for any reason not to register or to delay registration of such securities, the Company may, at its election, give written notice of such determination to each holder of the Warrant or the Warrant Shares and, thereupon, (a) in the case of a determination not to register, shall be relieved of its obligation to register any Warrant Shares in connection with such registration (but not from its obligation to pay the Registration Expenses in connection therewith) without prejudice, however, to the rights of any holder or holders of the Warrant and/or the Warrant Shares entitled to do so to request that such registration be effected as a registration under this paragraph and paragraph 14.1, and (b) in the case of a determination to delay registering, shall be permitted to delay registering any Warrant Shares for the same period as the delay in registering such other securities. No registration effected under this paragraph 14.2 shall relieve the Company of its obligation to effect any registration statement upon request under paragraph 14.1. The Company will pay all Registration Expenses in connection with each registration of Warrant Shares requested pursuant to this paragraph 14.2.

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15. Miscellaneous.

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IN WITNESS WHEREOF, the Company and the Holder have caused the Warrant to be executed by its officer thereunto duly authorized.

Dated: February 7, 2012

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NOTICE OF EXERCISE

(1) The undersigned hereby elects to purchase            Warrant Shares of the Company pursuant to the terms of the attached Warrant, , and tenders herewith payment of the exercise price in full. Payment shall take the form of in lawful money of the United States.

(2) Please issue a certificate or certificates representing said Warrant Shares in the name of the undersigned or in such other name as is specified below:

The Warrant Shares shall be delivered to the following:

(3) Accredited Investor. The undersigned is an “accredited investor” as defined in Regulation D under the Securities Act of 1933, as amended.

ASSIGNMENT FORM

(To assign the foregoing warrant, execute this form and supply required information. Do not use this form to exercise the warrant.)

FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to

                                                                                                           whose address is

                                                                                                                                                   .

                                                                                                  Dated:                 ,         

Signature Guaranteed:                                                                                           

NOTE: The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant, without alteration or enlargement or any change whatsoever, and must be guaranteed by a bank or trust company. Officers of corporations and those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing Warrant.