SECURITYAGREEMENT

Exhibit 10.3

Execution Version

SECURITY AGREEMENT

This SECURITY AGREEMENT, dated as of July 27, 2015 (as amended, supplemented, amended and restated or otherwise modified from time to time, this “Security Agreement”), is by and among CARBO CERAMICS INC., a Delaware corporation (the “Borrower”), each Material Domestic Subsidiary of the Borrower party hereto from time to time (collectively with the Borrower, the “Grantors” and individually, a “Grantor”), and WELLS FARGO BANK, NATIONAL ASSOCIATION, as Administrative Agent (in such capacity, the “Administrative Agent”) for the ratable benefit of the Secured Parties (as defined in the Credit Agreement referred to herein).

W I T N E S S E T H:

WHEREAS, this Security Agreement is entered into in connection with that certain Credit Agreement, dated as of January 29, 2010 (as heretofore and hereafter amended, supplemented, amended and restated or otherwise modified from time to time, the “Credit Agreement”), among the Borrower, the lenders party thereto from time to time (the “Lenders”), and Wells Fargo Bank, National Association, as Administrative Agent, as issuing lender (in such capacity, the “Issuing Lender”) and as swing line lender (in such capacity, the “Swing Line Lender”); and

WHEREAS, pursuant to the terms of the Credit Agreement, and in consideration of the credit extended by the Lenders to the Borrower and the letters of credit issued by the Issuing Lender for the account of the Borrower or any subsidiary of the Borrower, the Grantors are required to execute and deliver this Security Agreement; and

WHEREAS, it is in the best interests of each Grantor to execute this Security Agreement inasmuch as each Grantor will derive substantial direct and indirect benefits from (i) the transactions contemplated by the Credit Agreement and the other Credit Documents (as defined in the Credit Agreement), (ii) the Hedging Arrangements (as defined in the Credit Agreement) entered into by the Borrower or any other Credit Party (as defined in the Credit Agreement) with a Secured Swap Provider (as defined in the Credit Agreement), and (iii) the Banking Services (as defined in the Credit Agreement) provided by a Banking Services Provider, and each Grantor is willing to execute, deliver and perform its obligations under this Security Agreement to secure the Secured Obligations (as defined in the Credit Agreement).

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, each Grantor agrees, for the benefit of each Secured Party, as follows:

ARTICLE I

DEFINITIONS

SECTION 1.1. Certain Terms. The following terms (whether or not underscored) when used in this Security Agreement, including its preamble and recitals, shall have the following meanings (such definitions to be equally applicable to the singular and plural forms thereof):

“Administrative Agent” has the meaning set forth in the preamble.

“Borrower” has the meaning set forth in the preamble.

“Collateral” has the meaning set forth in Section 2.1(a).

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“Collateral Account” has the meaning set forth in Section 4.1(b).

“Credit Agreement” has the meaning set forth in the first recital.

“Excluded Contract” means any contract (and any contract rights arising thereunder) to which any of the Grantors is a party on the date hereof or which is entered into by any Grantor after the date hereof which complies with Section 6.5 of the Credit Agreement (and the provisions of which are not agreed to by a Grantor for the purposes of excluding such contract from the Lien granted hereunder), in any case to the extent (but only to the extent) that a Grantor is prohibited from granting a security interest in, pledge of, or charge, mortgage or lien upon any such Property by reason of (a) a negative pledge, anti-assignment provision or other contractual restriction in existence on the date hereof or, as to contracts entered into after the date hereof, in existence in compliance with Section 6.5 of the Credit Agreement (and the provisions of which are not agreed to by a Grantor for the purposes of excluding such contract from the Lien granted hereunder), or (b) applicable Legal Requirement to which such Grantor or such Property is subject; provided, however, to the extent that (i) either of the prohibitions discussed in clause (a) and (b) above is ineffective or subsequently rendered ineffective under Sections 9.406, 9.407, 9.408 or 9.409 of the UCC or under any other Legal Requirement or is otherwise no longer in effect or enforceable, or (ii) the applicable Grantor has obtained the consent of the other parties to such Excluded Contract to the creation of a lien and security interest in, such Excluded Contract, then such contract (and any contract rights arising thereunder) shall cease to be an “Excluded Contract” and shall automatically be subject to the lien and security interests granted hereby and to the terms and provisions of this Security Agreement as a “Collateral”; provided further, that any proceeds received by any Grantor from the sale, transfer or other disposition of Excluded Contracts shall constitute Collateral unless any Property constituting such proceeds are themselves subject to the exclusions set forth above.

“General Intangibles” means all “general intangibles” and all “payment intangibles”, each as defined in the UCC, and shall include all interest rate or currency protection or hedging arrangements, all tax refunds, all licenses, permits, concessions and authorizations (in each case, regardless of whether characterized as general intangibles under the UCC).

“Grantor” has the meaning set forth in the preamble.

“Indemnified Parties” has the meaning set forth in Section 6.3(a).

“Inventory” has the meaning set forth in Section 2.1(a)(i).

“Lenders” has the meaning set forth in the first recital.

“Receivables” has the meaning set forth in Section 2.1(a)(ii).

“Related Contracts” has the meaning set forth in Section 2.1(a)(ii).

“Secured Parties” has the meaning set forth in the Credit Agreement.

“Security Agreement” has the meaning set forth in the preamble.

“Termination Date” means the date that (i) all Secured Obligations have been paid in full in cash (other than reimbursement and indemnity obligations for which no notice of a claim has been made), all Letters of Credit have been terminated or expired (or been cash collateralized to the reasonable satisfaction of the respective Issuing Lender), all Hedging Arrangements with Secured Swap Providers have been terminated or novated to a counterparty that is not a Secured Party (or separately collateralized

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to the reasonable satisfaction of such Secured Swap Provider), and all Commitments shall have terminated or (ii) the Liens granted herein are otherwise terminated in full pursuant to the terms of the Credit Agreement.

“UCC” means the Uniform Commercial Code, as in effect in the State of Texas, as the same may be amended from time to time.

SECTION 1.2. Credit Agreement Definitions. Unless otherwise defined herein or the context otherwise requires, terms used in this Security Agreement, including its preamble and recitals, have the meanings provided in the Credit Agreement.

SECTION 1.3. UCC Definitions. Unless otherwise defined herein or the context otherwise requires, terms for which meanings are provided in the UCC are used in this Security Agreement, including its preamble and recitals, with such meanings.

SECTION 1.4. Miscellaneous. Article, Section, Schedule, and Exhibit references are to Articles and Sections of and Schedules and Exhibits to this Security Agreement, unless otherwise specified. All references to instruments, documents, contracts, and agreements (including this Security Agreement) are references to such instruments, documents, contracts, and agreements as the same may be amended, supplemented, and otherwise modified from time to time, unless otherwise specified and shall include all schedules and exhibits thereto unless otherwise specified. The words “hereof”, “herein”, and “hereunder” and words of similar import when used in this Security Agreement shall refer to this Security Agreement as a whole and not to any particular provision of this Security Agreement. The term “including” means “including, without limitation,”. Paragraph headings have been inserted in this Security Agreement as a matter of convenience for reference only and it is agreed that such paragraph headings are not a part of this Security Agreement and shall not be used in the interpretation of any provision of this Security Agreement.

ARTICLE II

SECURITY INTEREST

SECTION 2.1. Grant of Security Interest.

(a) Each Grantor hereby pledges, hypothecates, assigns, charges, mortgages, delivers, and transfers to the Administrative Agent, for the ratable benefit of each Secured Party, and hereby grants to the Administrative Agent, for the ratable benefit of each Secured Party, a continuing security interest in all of such Grantor’s right, title and interest in, to and under, all of the following, whether now owned or hereafter acquired by such Grantor, and wherever located and whether now owned or hereafter existing or arising (collectively, the “Collateral”):

(i) all inventory in all of its forms of such Grantor, wherever located, including (A) all raw materials and work in process therefore, finished goods thereof, and materials used or consumed in the manufacture or production thereof, (B) all documents of title covering any inventory, including work in process, materials used or consumed in any Grantor’s business, now owned or hereafter acquired or manufactured by any Grantor and held for sale in the ordinary course of its business (C) all goods in which such Grantor has an interest in mass or a joint or other interest or right of any kind (including goods in which such Grantor has an interest or right as consignee), (D) all goods which are returned to or repossessed by such Grantor, and all accessions thereto, products thereof and documents therefore, and (E) any other item constituting “inventory” under the UCC (any and all such inventory, materials, goods, accessions, products and documents being the “Inventory”);

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(ii) all accounts, payment intangibles, contracts, contract rights, all rights constituting a right to the payment of money, chattel paper, documents, documents of title, instruments, and General Intangibles of such Grantor, and arising out of or in connection with the sale or lease of goods or the rendering of services, including all rights of such Grantor now or hereafter existing in and to all security agreements, guaranties, leases, agreements and other contracts securing or otherwise relating to any such accounts, payment intangibles, contracts, contract rights, rights to the payment of money, chattel paper, documents, documents of title, instruments, and General Intangibles (any and all such accounts, payment intangibles, contracts, contract rights, rights to the payment of money, chattel paper, documents, documents of title, instruments, and General Intangibles being the “Receivables”, and any and all such security agreements, guaranties, leases, agreements and other contracts being the “Related Contracts”);

(iii) all books, correspondence, credit files, records, invoices, tapes, cards, computer runs, writings, data bases, information in all forms, paper and documents and other property relating to, used or useful in connection with, evidencing, embodying, incorporating or referring to, any of the foregoing in this Section 2.1(a);

(iv) all accessions, substitutions, replacements, products, offspring, rents, issues, profits, returns, income and proceeds of and from any and all of the foregoing Collateral (including proceeds which constitute property of the types described in sub-clauses (i), (ii) and (iii) and proceeds deposited from time to time in any lock boxes of such Grantor, and, to the extent not otherwise included, all payments and proceeds under insurance (whether or not the Administrative Agent is the loss payee thereof), or any condemnation award, indemnity, warranty or guaranty, payable by reason of loss or damage to or otherwise with respect to any of the Collateral);

(v) any and all Liens and security interests (together with the documents evidencing such security interests) granted to such Grantor by an obligor to secure such obligor’s obligations owing under any Instrument, Chattel Paper, or contract relating to, or giving rise to, Inventory, Receivables or Related Contracts that is pledged hereunder or with respect to which a security interest in such Grantor’s rights in such Instrument, Chattel Paper, or contract relating to, or giving rise to, Inventory, Receivables or Related Contracts is granted hereunder;

(vi) any and all guaranties given by any Person for the benefit of such Grantor which guarantees the obligations of an obligor under any Instrument, Chattel Paper, or contract relating to the Inventory, the Receivables or the Related Contracts, which are pledged hereunder; and

(vii) all of such Grantor’s other property and rights of every kind and description and interests therein relating to, or giving rise to, Inventory, Receivables or Related Contracts, including all other “Accounts”, “Chattel Paper”, “Commodity Contracts”, “Documents”, “General Intangibles”, “Goods”, “Instruments”, “Inventory”, “Money”, “Payment Intangibles”, and “Proceeds” as each such terms are defined in the UCC, in each case relating to or giving rise to any Inventory, Receivables or Related Contracts;

(b) Notwithstanding anything to the contrary contained in Section 2(a) and other than to the extent set forth in this Section 2(b), Excluded Contracts shall be excluded from the lien and security interest granted hereunder; provided, however, that (x) the exclusion from the Lien and security interest granted by any Grantor hereunder of any Excluded Contracts shall not limit, restrict or impair the grant by such Grantor of the Lien and security interest in any accounts or Receivables arising under any such Excluded Contracts or any payments due or to become due thereunder unless the conditions in effect

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which qualify such Property as Excluded Contracts applies with respect to such accounts and Receivables and (y) any proceeds received by any Grantor from the sale, transfer or other disposition of Excluded Contracts shall constitute Collateral unless the conditions in effect which qualify such Property as an Excluded Contract applies with respect to such proceeds.

SECTION 2.2. Security for Obligations.

(a) This Security Agreement, and the Collateral in which the Administrative Agent for the benefit of the Secured Parties is granted a security interest hereunder by each Grantor, secures the prompt and payment in full in cash and performance of all Secured Obligations.

(b) Notwithstanding anything contained herein to the contrary, it is the intention of each Grantor, the Administrative Agent and the other Secured Parties that the amount of the Secured Obligations secured by each Grantor’s interests in any of its Property shall be in, but not in excess of, the maximum amount permitted by fraudulent conveyance, fraudulent transfer and other similar law, rule or regulation of any Governmental Authority applicable to such Grantor. Accordingly, notwithstanding anything to the contrary contained in this Security Agreement or in any other agreement or instrument executed in connection with the payment of any of the Secured Obligations, the amount of the Secured Obligations secured by each Grantor’s interests in any of its Property pursuant to this Security Agreement shall be limited to an aggregate amount equal to the largest amount that would not render such Grantor’s obligations hereunder or the Liens and security interest granted to the Administrative Agent hereunder subject to avoidance under Section 548 of the United States Bankruptcy Code or any comparable provision of any other applicable law.

SECTION 2.3. Continuing Security Interest; Transfer of Advances; Reinstatement. This Security Agreement shall create continuing security interests in the Collateral and shall (a) except as otherwise provided in the Credit Agreement, remain in full force and effect until the Termination Date, (b) be binding upon each Grantor and its successors, transferees and assigns, and (c) inure, together with the rights and remedies of the Administrative Agent hereunder, to the benefit of the Administrative Agent and each other Secured Party and its respective permitted successors, transferees and assigns, subject to the limitations as set forth in the Credit Agreement. Without limiting the generality of the foregoing clause (c), any Lender may assign or otherwise transfer (in whole or in part) any Advance held by it as provided in Section 9.7 of the Credit Agreement, and any successor or assignee thereof shall thereupon become vested with all the rights and benefits in respect thereof granted to such Secured Party under any Credit Document (including this Security Agreement), or otherwise, subject, however, to any contrary provisions in such assignment or transfer, and as applicable to the provisions of Section 9.7 and Article 8 of the Credit Agreement. If at any time all or any part of any payment theretofore applied by the Administrative Agent or any other Secured Party to any of the Secured Obligations is or must be rescinded or returned by the Administrative Agent or any such Secured Party for any reason whatsoever (including the insolvency, bankruptcy, reorganization or other similar proceeding of any Grantor or any other Person), such Secured Obligations shall, for purposes of this Security Agreement, to the extent that such payment is or must be rescinded or returned, be deemed to have continued to be in existence, notwithstanding any application by the Administrative Agent or such Secured Party or any termination agreement or release provided to any Grantor, and this Security Agreement shall continue to be effective or reinstated, as the case may be, as to such Secured Obligations, all as though such application by the Administrative Agent or such Secured Party had not been made.

SECTION 2.4. Grantors Remain Liable. Anything herein to the contrary notwithstanding, (a) each Grantor shall remain liable under the contracts and agreements included in the Collateral to the extent set forth therein, and will perform all of its duties and obligations under such contracts and

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agreements to the same extent as if this Security Agreement had not been executed, (b) the exercise by the Administrative Agent of any of its rights hereunder shall not release any Grantor from any of its duties or obligations under any such contracts or agreements included in the Collateral, and (c) neither the Administrative Agent nor any other Secured Party shall have any obligation or liability under any contracts or agreements included in the Collateral by reason of this Security Agreement, nor shall the Administrative Agent nor any Secured Party be obligated to perform any of the obligations or duties of any Grantor thereunder or to take any action to collect or enforce any claim for payment assigned hereunder.

SECTION 2.5. Security Interest Absolute, etc. This Security Agreement shall in all respects be a continuing, absolute, unconditional and irrevocable grant of security interest, and shall remain in full force and effect until the Termination Date. All rights of the Secured Parties and the security interests granted to the Administrative Agent (for its benefit and the ratable benefit of each other Secured Party) hereunder, and all obligations of each Grantor hereunder, shall, in each case, be absolute, unconditional and irrevocable irrespective of (a) any lack of validity, legality or enforceability of any Credit Document, (b) the failure of any Secured Party (i) to assert any claim or demand or to enforce any right or remedy against any Grantor or any other Person under the provisions of any Credit Document or otherwise, or (ii) to exercise any right or remedy against any other guarantor of, or collateral securing, any Secured Obligations, (c) any change in the time, manner or place of payment of, or in any other term of, all or any part of the Secured Obligations, or any other extension, compromise or renewal of any Secured Obligations, (d) any reduction, limitation, impairment or termination of any Secured Obligations (except in the case of the occurrence of the Termination Date) for any reason, including any claim of waiver, release, surrender, alteration or compromise, and shall not be subject to (and each Grantor hereby waives any right to or claim of) any defense or setoff, counterclaim, recoupment or termination whatsoever by reason of the invalidity, illegality, nongenuineness, irregularity, compromise, unenforceability of, or any other event or occurrence affecting, any Secured Obligations or otherwise, (e) any amendment to, rescission, waiver, or other modification of, or any consent to or departure from, any of the terms of any Credit Document, (f) any addition, exchange or release of any Collateral of the Secured Obligations, or any surrender or non-perfection of any collateral, or any amendment to or waiver or release or addition to, or consent to or departure from, any other guaranty held by any Secured Party securing any of the Secured Obligations, or (g) any other circumstance which might otherwise constitute a defense available to, or a legal or equitable discharge of, any Grantor or any other Credit Party, any surety or any guarantor.

SECTION 2.6. Waiver of Subrogation. Until 91 days after the Termination Date, each Grantor hereby irrevocably waives any claim or other rights which it may now or hereafter acquire against any Credit Party that arise from the existence, payment, performance or enforcement of such Grantor’s obligations under this Security Agreement or any other Credit Document, including any right of subrogation, reimbursement, exoneration or indemnification, any right to participate in any claim or remedy of any Secured Party against any Credit Party or any collateral which any Secured Party now has or hereafter acquires, whether or not such claim, remedy or right arises in equity, or under contract, statute or common law, including the right to take or receive from any Credit Party, directly or indirectly, in cash or other property or by set-off or in any manner, payment or security on account of such claim or other rights. If any amount shall be paid to any Grantor in violation of the preceding sentence and the Termination Date shall not have occurred, then such amount shall be deemed to have been paid to such Grantor for the benefit of, and held in trust for, the Administrative Agent (on behalf of the Secured Parties), and shall forthwith be paid to the Administrative Agent to be credited and applied upon the Secured Obligations, whether matured or unmatured. Each Grantor acknowledges that it will receive direct and indirect benefits from the financing arrangements contemplated by the Credit Agreement and that the waiver set forth in this Section 2.6 is knowingly made in contemplation of such benefits.

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SECTION 2.7. Election of Remedies. Except as otherwise provided in the Credit Agreement, if any Secured Party may, under applicable law, proceed to realize its benefits under any of this Security Agreement or the other Credit Documents giving any Secured Party a Lien upon any Collateral, either by judicial foreclosure or by non-judicial sale or enforcement, such Secured Party may, at its sole option, determine which of its remedies or rights it may pursue without affecting any of its rights and remedies under this Security Agreement. If, in the exercise of any of its rights and remedies, any Secured Party shall forfeit any of its rights or remedies, including its right to enter a deficiency judgment against any Credit Party or any other Person, whether because of any applicable laws pertaining to “election of remedies” or the like, each Grantor hereby consents to such action by such Secured Party and waives any claim based upon such action, even if such action by such Secured Party shall result in a full or partial loss of any rights of subrogation that such Grantor might otherwise have had but for such action by such Secured Party.

ARTICLE III

REPRESENTATIONS AND WARRANTIES

In order to induce the Secured Parties to enter into the Credit Agreement and make Advances thereunder and for the Issuing Lenders to issue Letters of Credit thereunder, and to induce the Secured Parties to enter into Hedging Arrangements and Banking Services, each Grantor represents and warrants unto each Secured Party as set forth in this Article.

SECTION 3.1. Ownership, No Liens, etc. Such Grantor is the legal and beneficial owner of, and has good title to (and has full right and authority to pledge, grant and assign) the Collateral, free and clear of all Liens, except for any Lien that is a Permitted Lien. No effective UCC financing statement or other filing similar in effect covering all or any part of the Collateral is on file in any recording office, except those filed in favor of the Administrative Agent relating to this Security Agreement, Permitted Liens or as to which a duly authorized termination statement relating to such UCC financing statement or other instrument has been delivered to the Administrative Agent on date hereof. This Security Agreement creates a valid security interest in the Collateral, securing the payment of the Secured Obligations, and, except for the proper filing of the applicable financing statements with the filing offices listed on Item A-1 of Schedule I attached hereto, and all filings and other actions necessary to perfect and protect such security interest in the Collateral have been duly taken and, subject to Permitted Liens, such security interest shall be a first priority security interest.

SECTION 3.2. Grantor’s Name, Location, etc.

(a) Other than as otherwise permitted pursuant to any Credit Document, (i) the jurisdiction in which such Grantor is located for purposes of Sections 9.301 and 9.307 of the UCC is set forth in Item A-1 of Schedule I hereto, (ii) as of the date hereof or such later date on which such Grantor joins this Security Agreement, the place of business of such Grantor or, if such Grantor has more than one place of business, the chief executive office of such Grantor and the office where such Grantor keeps its records concerning the Receivables, is set forth in Item A-2 of Schedule I hereto, and (iii) such Grantor’s federal taxpayer identification number is set forth in Item A-3 of Schedule I hereto.

(b) Within the past five years, such Grantor has not been known by any legal name different from the one set forth on the signature page hereto, nor has such Grantor been the subject of any merger or other corporate reorganization, except as set forth in Item B of Schedule I hereto.

(c) None of the Receivables in excess of $10,000,000 is evidenced by a promissory note or other instrument other than a promissory note or instrument that has been delivered to the Administrative Agent (with appropriate endorsements).

(d) As of the date hereof or such later date on which such Grantor joins this Security Agreement, the name set forth on the signature page attached hereto (or, if applicable, the signature page to the supplement document pursuant to which such Grantor joins this Security Agreement) is the true and correct legal name (as defined in the UCC) of such Grantor.

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SECTION 3.3. Possession of Inventory; Control. Such Grantor has exclusive possession and control, subject to Permitted Liens, of the Inventory, except as otherwise required, necessary or customary in the ordinary course of its business. Such Grantor has not consented to, and is otherwise unaware of, any Person (other than, if applicable, the Administrative Agent pursuant to Section 4.1(b) hereof) having control (within the meaning of Section 9.104 or Section 8.106 of the UCC) over any Collateral, or any other interest in any of such Grantor’s rights in respect thereof.

SECTION 3.4. Instruments and Tangible Chattel Paper. Such Grantor has, contemporaneously herewith or as otherwise permitted herein, delivered (or will deliver as required herein) to the Administrative Agent possession of all originals of all certificates or instruments representing or evidencing any Collateral consisting of Instruments and Tangible Chattel Paper relating to, or giving rise to, Inventory, Receivables or Related Contracts that individually, or collectively, evidence amounts payable in excess of $10,000,000, owned or held by such Grantor (duly endorsed, in blank, if requested by the Administrative Agent).

SECTION 3.5. Authorization, Approval, etc. Except as have been obtained or made and are in full force and effect, no Governmental Approval, authorization, approval or other action by, and no notice to or filing with, any Governmental Authority or any other third party is required either (a) for the grant by such Grantor of the security interest granted hereby or (b) for the perfection or maintenance of the security interests hereunder including the first priority (subject to Permitted Liens) nature of such security interest or the exercise by the Administrative Agent of its rights and remedies hereunder.

SECTION 3.6. Best Interests. It is in the best interests of each Grantor to execute this Security Agreement in as much as such Grantor will, as a result of being the Borrower, or a Material Domestic Subsidiary of the Borrower, derive substantial direct and indirect benefits from (a) the Advances and other extensions of credit (including Letters of Credit) made from time to time to the Borrower or any other Grantor by the Lenders and the Issuing Lender pursuant to the Credit Agreement, (b) the Hedging Arrangements entered into with the Secured Swap Providers, and (c) the Banking Services provided by the Lenders or their Affiliates, and each Grantor agrees that the Secured Parties are relying on this representation in agreeing to make such Advances and other extensions of credit pursuant to the Credit Agreement to the Borrower. Furthermore, such extensions of credit, Hedging Arrangements and Banking Services are (i) in furtherance of each Grantor’s corporate purposes, and (ii) necessary or convenient to the conduct, promotion or attainment of each Grantor’s business.

ARTICLE IV

COVENANTS

Each Grantor covenants and agrees that, until the Termination Date, it will perform, comply with and be bound by the obligations set forth below.

SECTION 4.1. As to Accounts.

(a) Each Grantor shall have the right to collect all Accounts so long as no Event of Default shall have occurred and be continuing.

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(b) Upon (i) the occurrence and continuance of an Event of Default and (ii) the delivery of notice by the Administrative Agent to each Grantor, all Proceeds of Collateral received by any Grantor shall be delivered in kind to the Administrative Agent for deposit in a Deposit Account of such Grantor (A) maintained with the Administrative Agent or (B) maintained at a depositary bank other than the Administrative Agent to which such Grantor, the Administrative Agent and the depositary bank have entered into a Control Agreement in form and substance acceptable to the Administrative Agent in its sole discretion providing that the depositary bank will comply with the instructions originated by the Administrative Agent directing disposition of the funds in the account without further consent by such Grantor (any such Deposit Accounts, together with any other Deposit Accounts pursuant to which any portion of the Collateral is deposited with the Administrative Agent, a “Collateral Account,” and collectively, the “Collateral Accounts”), and such Grantor shall not commingle any such Proceeds, and shall hold separate and apart from all other property, all such Proceeds in express trust for the benefit of the Administrative Agent until delivery thereof is made to the Administrative Agent.

(c) Following the delivery of notice pursuant to clause (b)(ii) during the continuance of an Event of Default, the Administrative Agent shall have the right to apply any amount in the Collateral Account to the payment of any Secured Obligations which are due and payable or in accordance with Section 7.6 of the Credit Agreement.

(d) With respect to each of the Collateral Accounts, it is hereby confirmed and agreed that (i) deposits in such Collateral Account are subject to a security interest as contemplated hereby, (ii) such Collateral Account shall be under the control of the Administrative Agent after the occurrence and during the continuance of an Event of Default (unless otherwise agreed to by the Borrower and the Majority Lenders), and (iii) the Administrative Agent shall have the sole right of withdrawal over such Collateral Account; provided that such withdrawals shall only be made during the existence of an Event of Default.

(e) No Grantor shall adjust, settle, or compromise the amount or payment of any Receivable, nor release wholly or partly any account debtor or obligor thereof, nor allow any credit or discount thereon; provided that, a Grantor may make such adjustments, settlements or compromises and release wholly or partly any account debtor or obligor thereof and allow any credit or discounts thereon so long as (i) such action is taken in the ordinary course of business, and (ii) such action is, in such Grantor’s good faith business judgment, advisable.

SECTION 4.2. As to Grantor’s Use of Collateral.

(a) Subject to clause (b), each Grantor (i) may in the ordinary course of its business, at its own expense, sell, lease or furnish under the contracts of service any of the Inventory held by such Grantor for such purpose, and use and consume any raw materials, work in process or materials held by such Grantor for such purpose, (ii) following the occurrence and during the continuance of an Event of Default, shall, at its own expense, endeavor to collect, as and when due, all amounts due with respect to any of the Collateral, including the taking of such action with respect to such collection as the Administrative Agent may request or, in the absence of such request, as such Grantor may deem advisable, and (iii) may grant, in the ordinary course of business, to any party obligated on any of the Collateral, any rebate, refund or allowance to which such party may be lawfully entitled, and may accept, in connection therewith, the return of Goods, the sale or lease of which shall have given rise to such Collateral.

(b) At any time following the occurrence and during the continuance of an Event of Default, whether before or after the maturity of any of the Secured Obligations, the Administrative Agent may (i) revoke any or all of the rights of any Grantor set forth in clause (a), (ii) notify any parties

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obligated on any of the Collateral to make payment to the Administrative Agent of any amounts due or to become due thereunder, and (iii) enforce collection of any of the Collateral by suit or otherwise and surrender, release, or exchange all or any part thereof, or compromise or extend or renew for any period (whether or not longer than the original period) any indebtedness thereunder or evidenced thereby.

(c) Upon request of the Administrative Agent following the occurrence and during the continuance of an Event of Default, each Grantor will, at its own expense, notify any parties obligated on any of the Collateral to make payment to the Administrative Agent of any amounts due or to become due thereunder.

(d) At any time following the occurrence and during the continuation of an Event of Default, the Administrative Agent may endorse, in the name of the applicable Grantor, any item, howsoever received by the Administrative Agent, representing any payment on or other Proceeds of any of the Collateral.

SECTION 4.3. As to Inventory and Goods. Following the occurrence and during the continuance of an Event of Default, each Grantor agrees to take such action as is reasonably requested by the Administrative Agent to enable it to properly perfect and protect its Lien on Inventory and Goods that such Grantor has transferred from a jurisdiction within the United States of America or its offshore waters to a jurisdiction outside of the United States of America or its offshore waters.

SECTION 4.4. As to Electronic Chattel Paper and Transferable Records. If any Grantor at any time holds or acquires an interest in any electronic chattel paper or any “transferable record,” as that term is defined in Section 201 of the U.S. Federal Electronic Signatures in Global and National Commerce Act, or in Section 16 of the U.S. Uniform Electronic Transactions Act as in effect in any relevant jurisdiction which constitutes Collateral and with a value in excess of $10,000,000, such Grantor shall promptly notify the Administrative Agent thereof and, at the reasonable request of the Administrative Agent, shall take such action as the Administrative Agent may reasonably request to vest in the Administrative Agent control (for the ratable benefit of Secured Parties) under Section 9.105 of the UCC of such electronic chattel paper or control under Section 201 of the Federal Electronic Signatures in Global and National Commerce Act or, as the case may be, Section 16 of the Uniform Electronic Transactions Act, as so in effect in such jurisdiction, of such transferable record. The Administrative Agent agrees with each Grantor that the Administrative Agent will arrange, pursuant to procedures reasonably satisfactory to the Administrative Agent and so long as such procedures will not result in the Administrative Agent’s loss of control, for such Grantor to make alterations to the electronic chattel paper or transferable record permitted under Section 9.105 of the UCC or, as the case may be, Section 201 of the U.S. Federal Electronic Signatures in Global and National Commerce Act or Section 16 of the U.S. Uniform Electronic Transactions Act for a party in control to allow without loss of control, unless an Event of Default has occurred and is continuing or would occur after taking into account any action by such Grantor with respect to such electronic chattel paper or transferable record.

SECTION 4.5. Further Assurances, etc. Each Grantor shall warrant and defend the right and title herein granted unto the Administrative Agent in and to the Collateral (and all right, title and interest represented by the Collateral) against the claims and demands of all Persons whomsoever. Each Grantor agrees that, from time to time at its own expense, it will promptly execute and deliver all further instruments and documents, and take all further action, that may be necessary or that the Administrative Agent may reasonably request, in order to perfect, preserve and protect any security interest granted or purported to be granted hereby or to enable the Administrative Agent to exercise and enforce its rights and remedies hereunder with respect to any Collateral subject to the terms hereof. Each Grantor agrees that, upon the acquisition after the date hereof by such Grantor of any Collateral, with respect to which the security interest granted hereunder is not perfected automatically upon such acquisition, to take such actions with respect to such Collateral or any part thereof as required by the Credit Documents. Without limiting the generality of the foregoing, each Grantor will:

(a) from time to time upon the request of the Administrative Agent, promptly deliver to the Administrative Agent such stock powers, instruments and similar documents, reasonably satisfactory in form and substance to the Administrative Agent, with respect to such Collateral representing an amount payable in excess of $10,000,000 as the Administrative Agent may reasonably request and will, from time to time upon the request of the Administrative Agent, after the occurrence and during the continuance of any Event of Default, if any Collateral shall be evidenced by an Instrument, negotiable Document, promissory note or tangible Chattel Paper, deliver and pledge to the Administrative Agent hereunder such Instrument, negotiable Document, promissory note, or tangible Chattel Paper duly endorsed and accompanied by duly executed instruments of transfer or assignment, all in form and substance satisfactory to the Administrative Agent;

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(b) file (and hereby authorize the Administrative Agent to file) such financing statements or continuation statements, or amendments thereto, and such other instruments or notices (including, after the occurrence and during the continuance of any Event of Default, any assignment of claim form under or pursuant to the federal assignment of claims statute, 31 U.S.C. § 3726, any successor or amended version thereof or any regulation promulgated under or pursuant to any version thereof), as may be necessary or that the Administrative Agent may reasonably request in order to perfect and preserve the security interests in accordance with the UCC and other applicable Texas law and other rights granted or purported to be granted to the Administrative Agent hereby; and

(c) furnish to the Administrative Agent, from time to time at the Administrative Agent’s reasonable request, statements and schedules further identifying and describing the Collateral and such other reports in connection with the Collateral as the Administrative Agent may reasonably request, all in reasonable detail.

The authorization contained in Section 4.5(b) above shall be irrevocable and continuing until the Termination Date. Each Grantor agrees that a carbon, photographic or other reproduction of this Security Agreement or any UCC financing statement covering the Collateral or any part thereof shall be sufficient as a UCC financing statement where permitted by law.

ARTICLE V

THE ADMINISTRATIVE AGENT

SECTION 5.1. Administrative Agent Appointed Attorney-in-Fact. Each Grantor hereby irrevocably appoints the Administrative Agent its attorney-in-fact, with full authority in the place and stead of such Grantor and in the name of such Grantor or otherwise, from time to time in the Administrative Agent’s discretion, following the occurrence and during the continuance of an Event of Default, to take any action and to execute any instrument which the Administrative Agent may deem necessary or advisable to accomplish the purposes of this Security Agreement, including (a) to ask, demand, collect, sue for, recover, compromise, receive and give acquittance and receipts for moneys due and to become due under or in respect of any of the Collateral, (b) to receive, endorse, and collect any drafts or other Instruments, Documents and Chattel Paper constituting Collateral, in connection with clause (a) above, (c) to file any claims or take any action or institute any proceedings which the Administrative Agent may deem necessary or desirable for the collection of any of the Collateral or otherwise to enforce the rights of the Administrative Agent with respect to any of the Collateral, and (d) to perform the affirmative obligations of such Grantor hereunder. EACH GRANTOR HEREBY ACKNOWLEDGES, CONSENTS AND AGREES THAT THE POWER OF ATTORNEY GRANTED PURSUANT TO THIS SECTION 5.1 IS IRREVOCABLE AND COUPLED WITH AN INTEREST AND SHALL BE EFFECTIVE UNTIL THE TERMINATION DATE.

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SECTION 5.2. Administrative Agent May Perform. If any Grantor fails to perform any agreement contained herein, the Administrative Agent may, during the continuance of any Event of Default, itself perform, or cause performance of, such agreement, and the expenses of the Administrative Agent incurred in connection therewith shall be payable by such Grantor pursuant to Section 6.3 hereof and Section 9.1 of the Credit Agreement and the Administrative Agent may from time to time take any other action which the Administrative Agent reasonably deems necessary for the maintenance, preservation or protection of any of the Collateral or of its security interest therein.

SECTION 5.3. Administrative Agent Has No Duty. The powers conferred on the Administrative Agent hereunder are solely to protect its interest (on behalf of the Secured Parties) in the Collateral and shall not impose any duty on it to exercise any such powers. Except for reasonable care of any Collateral in its possession and the accounting for moneys actually received by it hereunder, the Administrative Agent shall have no duty as to any Collateral or responsibility for taking any necessary steps to preserve rights against prior parties or any other rights pertaining to any Collateral.

SECTION 5.4. Reasonable Care. The Administrative Agent is required to exercise reasonable care in the custody and preservation of any of the Collateral in its possession; provided, that the Administrative Agent shall be deemed to have exercised reasonable care in the custody and preservation of any of the Collateral (a) if such Collateral is accorded treatment substantially equal to that which the Administrative Agent accords its own personal property, or (b) if the Administrative Agent takes such action for that purpose as any Grantor reasonably requests in writing at times other than upon the occurrence and during the continuance of an Event of Default; provided, further, that failure of the Administrative Agent to comply with any such request at any time shall not in itself be deemed a failure to exercise reasonable care.

ARTICLE VI

REMEDIES

SECTION 6.1. Certain Remedies. If any Event of Default shall have occurred and be continuing:

(a) The Administrative Agent may exercise in respect of the Collateral, in addition to other rights and remedies provided for herein or otherwise available to it, all the rights and remedies of a secured party on default under the UCC (whether or not the UCC applies to the affected Collateral) and also may (i) take possession of any Collateral not already in its possession without demand and without legal process, (ii) require any Grantor to, and each Grantor hereby agrees that it will, at its expense and upon request of the Administrative Agent forthwith, assemble all or part of the Collateral as directed by the Administrative Agent and make it available to the Administrative Agent at a place to be designated by the Administrative Agent that is reasonably convenient to both parties, (iii) subject to applicable law or agreements with landlords, bailees, or warehousemen, enter onto the property where any Collateral is located and take possession thereof without demand and without legal process, (iv) without notice except as specified below, lease, license, sell or otherwise dispose of the Collateral or any part thereof in one or more parcels at public or private sale, at any of the Administrative Agent’s offices or elsewhere, for cash, on credit or for future delivery, and upon such other terms as the Administrative Agent may deem commercially reasonable. Each Grantor agrees that, to the extent notice of sale shall be required by law, at least ten (10) days’ prior notice to the applicable Grantor of the time and place of any public sale or the time of any private sale is to be made shall constitute reasonable notification; provided, however, that

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with respect to Collateral that is (x) perishable or threatens to decline speedily in value, or (y) is of a type customarily sold on a recognized market (including Investment Property), no notice of sale or disposition need be given. For purposes of this Article VI, notice of any intended sale or disposition of any Collateral may be given by first-class mail, hand-delivery (through a delivery service or otherwise), facsimile or email, and shall be deemed to have been “sent” upon deposit in the U.S. Mails with adequate postage properly affixed, upon delivery to an express delivery service or upon electronic submission through telephonic or internet services, as applicable. The Administrative Agent shall not be obligated to make any sale of Collateral regardless of notice of sale having been given. The Administrative Agent may adjourn any public or private sale from time to time by announcement at the time and place fixed therefor, and such sale may, without further notice, be made at the time and place to which it was so adjourned.

(b) Each Grantor that is or may become a fee estate owner of property where any Collateral is located (regardless of ownership thereof by any other Grantor) agrees and acknowledges that (i) Administrative Agent may remove the Collateral or any part thereof from such property in accordance with statutory law appertaining thereto without objection, delay, hindrance or interference by such Grantor and in such case such Grantor will make no claim or demand whatsoever against the Collateral, (ii) it will (x) cooperate with Administrative Agent in its efforts to assemble and/or remove all of the Collateral located on such property; (y) permit Administrative Agent and its agents to enter upon such property and occupy the property at any or all times to conduct an auction or sale, and/or to inspect, audit, examine, safeguard, assemble, appraise, display, remove, maintain, prepare for sale or lease, repair, lease, transfer, auction and/or sell the Collateral; and (z) not hinder Administrative Agent’s actions in enforcing its security interest in the Collateral.

(c) Each Grantor agrees and acknowledges that a commercially reasonable disposition of Inventory or Goods constituting Collateral may be by lease of, in addition to the sale of, such Collateral. Each Grantor further agrees and acknowledges that the following shall be deemed a reasonable commercial disposition: (i) a disposition made in the usual manner on any recognized market, (ii) a disposition at the price current in any recognized market at the time of disposition, and (iii) a disposition in conformity with reasonable commercial practices among dealers in the type of property subject to the disposition.

(d) All cash Proceeds received by the Administrative Agent in respect of any sale of, collection from, or other realization upon, all or any part of the Collateral shall be applied by the Administrative Agent against, all or any part of the Obligations as set forth in Section 7.6 of the Credit Agreement. The Administrative Agent shall not be obligated to apply or pay over for application noncash proceeds of collection or enforcement unless (i) the failure to do so would be commercially unreasonable, and (ii) the affected party has provided the Administrative Agent with a written demand to apply or pay over such noncash proceeds on such basis.

(e) The Administrative Agent may do any or all of the following: (i) transfer all or any part of the Collateral into the name of the Administrative Agent or its nominee, with or without disclosing that such Collateral is subject to the Lien hereunder, (ii) notify the parties obligated on any of the Collateral to make payment to the Administrative Agent of any amount due or to become due thereunder, (iii) withdraw, or cause or direct the withdrawal, of all funds with respect to the Collateral Account, (iv) enforce collection of any of the Collateral by suit or otherwise, and surrender, release or exchange all or any part thereof, or compromise or extend or renew for any period (whether or not longer than the original period) any obligations of any nature of any party with respect thereto, (v) endorse any checks, drafts, or other writings in the applicable Grantor’s name to allow collection of the Collateral, (vi) take control of any Proceeds of the Collateral, or (vii) execute (in the name, place and stead of the applicable Grantor) endorsements, assignments, stock powers and other instruments of conveyance or transfer with respect to all or any of the Collateral.

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SECTION 6.2. Compliance with Restrictions. Each Grantor agrees that in any sale of any of the Collateral whenever an Event of Default shall have occurred and be continuing, the Administrative Agent is hereby authorized to comply with any limitation or restriction in connection with such sale as it may be advised by counsel is necessary in order to avoid any violation of applicable law (including compliance with such procedures as may restrict the number of prospective bidders and purchasers, require that such prospective bidders and purchasers have certain qualifications, and restrict such prospective bidders and purchasers to Persons who will represent and agree that they are purchasing for their own account for investment and not with a view to the distribution or resale of such Collateral), or in order to obtain any required approval of the sale or of the purchaser by any Governmental Authority or official, and each Grantor further agrees that such compliance shall not result in such sale being considered or deemed not to have been made in a commercially reasonable manner, nor shall the Administrative Agent be liable nor accountable to such Grantor for any discount allowed by the reason of the fact that such Collateral is sold in compliance with any such limitation or restriction.

SECTION 6.3. Indemnity and Expenses.

(a) WITHOUT LIMITING THE GENERALITY OF THE PROVISIONS OF SECTION 9.2 OF THE CREDIT AGREEMENT, EACH GRANTOR HEREBY AGREES TO, JOINTLY AND SEVERALLY, INDEMNIFY AND HOLD HARMLESS THE ADMINISTRATIVE AGENT, EACH SECURED PARTY AND EACH OF THEIR RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, AGENTS AND ADVISORS (ANY OF THE FOREGOING BEING, AN “INDEMNITEE”) FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES, LIABILITIES, COSTS, AND EXPENSES (INCLUDING, WITHOUT LIMITATION, REASONABLE ATTORNEYS’ FEES) THAT MAY BE INCURRED BY OR ASSERTED OR AWARDED AGAINST ANY INDEMNITEE, IN EACH CASE ARISING OUT OF OR IN CONNECTION WITH OR BY REASON OF (INCLUDING, WITHOUT LIMITATION, IN CONNECTION WITH ANY INVESTIGATION, LITIGATION, OR PROCEEDING OR PREPARATION OF DEFENSE IN CONNECTION THEREWITH), THIS SECURITY AGREEMENT, THE CREDIT DOCUMENTS, ANY OF THE TRANSACTIONS CONTEMPLATED HEREIN OR THE ACTUAL OR PROPOSED USE OF THE PROCEEDS OF THE ADVANCES, INCLUDING SUCH INDEMNITEE’S OWN NEGLIGENCE, EXCEPT TO THE EXTENT SUCH CLAIM, DAMAGE, LOSS, LIABILITY, COST, OR EXPENSE IS FOUND IN A FINAL, NON-APPEALABLE JUDGMENT BY A COURT OF COMPETENT JURISDICTION TO HAVE RESULTED FROM SUCH INDEMNITEE’S GROSS NEGLIGENCE OR WILLFUL MISCONDUCT. IN THE CASE OF AN INVESTIGATION, LITIGATION OR OTHER PROCEEDING TO WHICH THE INDEMNITY IN THIS SECTION 6.3 APPLIES, SUCH INDEMNITY SHALL BE EFFECTIVE WHETHER OR NOT SUCH INVESTIGATION, LITIGATION OR PROCEEDING IS BROUGHT BY ANY CREDIT PARTY, ITS DIRECTORS, SHAREHOLDERS OR CREDITORS OR AN INDEMNITEE OR ANY OTHER PERSON OR ANY INDEMNITEE IS OTHERWISE A PARTY THERETO AND WHETHER OR NOT THE TRANSACTIONS CONTEMPLATED HEREBY ARE CONSUMMATED. THE FOREGOING INDEMNITY AND HOLD HARMLESS SHALL NOT APPLY TO ANY CLAIMS, DAMAGES, LOSSES, LIABILITIES, COSTS OR EXPENSES THAT IS INCURRED BY OR ASSERTED OR AWARDED AGAINST ANY INDEMNITEE DIRECTLY FOR, OR AS A DIRECT CONSEQUENCE OF, SUCH INDEMNITEE BEING A DEFAULTING LENDER UNDER CLAUSE (A) OR (B) OF THE DEFINITION OF “DEFAULTING LENDER”, WHETHER ASSERTED BY ANY CREDIT PARTY, THE ADMINISTRATIVE AGENT, THE ISSUING LENDER OR THE SWING LINE LENDER.

(b) Other than as set forth in clause (c) below, each Grantor will upon demand pay to the Administrative Agent the amount of any and all reasonable out-of-pocket costs and expenses, including the reasonable fees and out-of-pocket expenses of its counsel, which the Administrative Agent may incur in connection herewith, including in connection with the administration of this Security Agreement and the custody, preservation, use or operation of, any of the Collateral.

(c) Each Grantor will upon demand pay to the Administrative Agent the amount of any and all out-of-pocket costs expenses, including the fees and expense of its outside counsel and of outside counsel of each Lender, which the Administrative Agent may incur in connection (i) the sale of, collection from, or other realization upon, any of the Collateral, (ii) the exercise or enforcement of any of the rights of the Administrative Agent or any of the Secured Parties hereunder, or (iii) the failure by any Grantor to perform or observe any of the provisions hereof.

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SECTION 6.4. Warranties. The Administrative Agent may sell the Collateral without giving any warranties or representations as to the Collateral. The Administrative Agent may disclaim any warranties of title or the like. Each Grantor agrees that this procedure will not be considered to adversely affect the commercial reasonableness of any sale of the Collateral.

ARTICLE VII

MISCELLANEOUS PROVISIONS

SECTION 7.1. Credit Document. This Security Agreement is a Credit Document executed pursuant to the Credit Agreement and shall (unless otherwise expressly indicated herein) be construed, administered and applied in accordance with the terms and provisions thereof, including Article 9 thereof.

SECTION 7.2. Binding on Successors, Transferees and Assigns; Assignment. This Security Agreement shall remain in full force and effect until the Termination Date has occurred, shall be binding upon each Grantor and its successors, transferees and assigns and, subject to the limitations set forth in the Credit Agreement, shall inure to the benefit of and be enforceable by each Secured Party and its successors, transferees and assigns; provided that, no Grantor shall assign any of its obligations hereunder (unless otherwise permitted under the terms of the Credit Agreement or this Security Agreement).

SECTION 7.3. Amendments, etc. No amendment to or waiver of any provision of this Security Agreement, nor consent to any departure by any Grantor from its obligations under this Security Agreement, shall in any event be effective unless the same shall be in writing and signed by the Administrative Agent (on behalf of the Lenders or the Majority Lenders, as the case may be, pursuant to Section 9.3 of the Credit Agreement) and such Grantor and then such waiver or consent shall be effective only in the specific instance and for the specific purpose for which given.

SECTION 7.4. Notices. Except as otherwise provided in this Security Agreement, all notices and other communications provided for hereunder shall be in writing and hand delivered with written receipt, telecopied, sent by facsimile (with a hard copy sent as otherwise permitted pursuant to the Credit Agreement), sent by a nationally recognized overnight courier, or sent by certified mail, return receipt requested to the appropriate party at the address or facsimile number of such party specified in the Credit Agreement, on the signature pages of this Security Agreement or at such other address or facsimile number as may be designated by such party in a notice to the other party. Except as otherwise provided in this Security Agreement, all such notices and communications shall be effective when delivered.

SECTION 7.5. No Waiver; Remedies. In addition to, and not in limitation of Section 2.5, no failure on the part of any Secured Party to exercise, and no delay in exercising, any right hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any right hereunder preclude any other or further exercise thereof or the exercise of any other right. The remedies herein provided are cumulative and not exclusive of any remedies provided by law.

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SECTION 7.6. Headings. Paragraph headings have been inserted in this Security Agreement as a matter of convenience for reference only and it is agreed that such paragraph headings are not a part of this Security Agreement and shall not be used in the interpretation of any provision of this Security Agreement.

SECTION 7.7. Severability. In case one or more provisions of this Security Agreement or the other Credit Documents shall be invalid, illegal or unenforceable in any respect under any applicable law, the validity, legality, and enforceability of the remaining provisions contained herein or therein shall not be affected or impaired thereby.

SECTION 7.8. Counterparts. This Security Agreement may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement.

SECTION 7.9. [Reserved].

SECTION 7.10. Additional Grantors. Additional Material Domestic Subsidiaries of Borrower may from time to time enter into this Security Agreement as a Grantor. Upon execution and delivery after the date hereof by the Administrative Agent and such Material Domestic Subsidiary of an instrument in the form of Annex 1, such Material Domestic Subsidiary shall become a Grantor hereunder with the same force and effect as if originally named as a Grantor herein. The execution and delivery of any instrument adding an additional Grantor as a party to this Security Agreement shall not require the consent of any other Grantor hereunder. The rights and obligations of each Grantor hereunder shall remain in full force and effect notwithstanding the addition of any new Grantor as a party to this Security Agreement.

SECTION 7.11. [Reserved].

SECTION 7.12. Conflicts with Credit Agreement. To the fullest extent possible, the terms and provisions of the Credit Agreement shall be read together with the terms and provisions of this Security Agreement so that the terms and provisions of this Security Agreement do not conflict with the terms and provisions of the Credit Agreement; provided, however, notwithstanding the foregoing, in the event that any of the terms or provisions of this Security Agreement conflict with any terms or provisions of the Credit Agreement, the terms or provisions of the Credit Agreement shall govern and control for all purposes; provided that the inclusion in this Security Agreement of terms and provisions, supplemental rights or remedies in favor of the Administrative Agent not addressed in the Credit Agreement shall not be deemed to be in conflict with the Credit Agreement and all such additional terms, provisions, supplemental rights or remedies contained herein shall be given full force and effect.

SECTION 7.13. Governing Law. This Security Agreement shall be governed by, and construed and enforced in accordance with, the laws of the State of Texas.

SECTION 7.14. Submission to Jurisdiction. EACH GRANTOR HEREBY IRREVOCABLY SUBMITS TO THE JURISDICTION OF ANY TEXAS STATE OR FEDERAL COURT SITTING IN HOUSTON, TEXAS IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS SECURITY AGREEMENT OR THE OTHER CREDIT DOCUMENTS, AND EACH GRANTOR HEREBY IRREVOCABLY AGREES THAT ALL CLAIMS IN RESPECT OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN SUCH COURT. EACH CREDIT PARTY HEREBY UNCONDITIONALLY AND IRREVOCABLY WAIVES, TO THE FULLEST EXTENT IT MAY EFFECTIVELY DO SO, ANY RIGHT IT MAY HAVE TO THE DEFENSE OF AN INCONVENIENT FORUM TO THE MAINTENANCE OF SUCH ACTION OR PROCEEDING. EACH GRANTOR HEREBY AGREES THAT SERVICE

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OF COPIES OF THE SUMMONS AND COMPLAINT AND ANY OTHER PROCESS WHICH MAY BE SERVED IN ANY SUCH ACTION OR PROCEEDING MAY BE MADE BY MAILING OR DELIVERING A COPY OF SUCH PROCESS TO SUCH GRANTOR AT ITS ADDRESS SET FORTH IN THIS SECURITY AGREEMENT. EACH GRANTOR HEREBY AGREES THAT A FINAL JUDGMENT IN ANY SUCH ACTION OR PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER JURISDICTIONS BY SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER PROVIDED BY LAW. NOTHING IN THIS SECTION SHALL AFFECT THE RIGHTS OF ANY LENDER TO SERVE LEGAL PROCESS IN ANY OTHER MANNER PERMITTED BY THE LAW OR AFFECT THE RIGHT OF ANY LENDER TO BRING ANY ACTION OR PROCEEDING AGAINST ANY GRANTOR OR ITS PROPERTY IN THE COURTS OF ANY OTHER JURISDICTION.

SECTION 7.15. [Reserved].

SECTION 7.16. [Reserved].

SECTION 7.17. Waiver of Jury. EACH GRANTOR, THE LENDERS, THE ADMINISTRATIVE AGENT, THE ISSUING LENDER, AND THE SWING LINE LENDER HEREBY IRREVOCABLY WAIVE ANY AND ALL RIGHT TO TRIAL BY JURY IN RESPECT OF ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS SECURITY AGREEMENT, ANY OTHER CREDIT DOCUMENT, OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREBY.

THIS SECURITY AGREEMENT AND THE OTHER CREDIT DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND SUPERSEDE ALL PRIOR UNDERSTANDINGS AND AGREEMENTS, WHETHER WRITTEN OR ORAL, RELATING TO THE TRANSACTIONS PROVIDED FOR HEREIN AND THEREIN. ADDITIONALLY, THIS SECURITY AGREEMENT AND THE CREDIT DOCUMENTS MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.

THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

[Remainder of this page intentionally left blank. Signature pages to follow.]

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IN WITNESS WHEREOF, each of the parties hereto has caused this Security Agreement to be duly executed and delivered by its Responsible Officer as of the date first above written.

Signature Page to Security Agreement

Signature Page to Security Agreement

SCHEDULE I

to Security

Agreement

Borrower:

Borrower:

CARBO Ceramics Inc.

575 N. Dairy Ashford Road, Suite 300

Houston, Texas 77079

Borrower:

None.

Security Agreement

Schedule I

Annex 1 to Security

Agreement

SUPPLEMENT NO.              dated as of             , 20     (the “Supplement”), to the Security Agreement dated as of July 27, 2015 (as amended, supplemented, restated, or otherwise modified from time to time, the “Security Agreement”), among CARBO CERAMICS INC., a Delaware corporation (the “Borrower”) and each Material Domestic Subsidiary of the Borrower party thereto from time to time (collectively with the Borrower, the “Grantors” and individually, a “Grantor”), and WELLS FARGO BANK, NATIONAL ASSOCIATION (“Wells Fargo”), as Administrative Agent (the “Administrative Agent”) for the ratable benefit of the Secured Parties (as defined in the Credit Agreement referred to herein).

A. Reference is made to that certain Credit Agreement, dated as of January 29, 2010 (as amended, supplemented, amended and restated or otherwise modified from time to time, the “Credit Agreement”), among the Borrower, the lenders party thereto from time to time (the “Lenders”), and Wells Fargo Bank, National Association, as the Administrative Agent, the issuing lender and the swing line lender.

B. Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Security Agreement and the Credit Agreement.

C. Section 7.10 of the Security Agreement provides that additional Material Domestic Subsidiaries of the Borrower may become Grantors under the Security Agreement by execution and delivery of an instrument in the form of this Supplement. The undersigned Material Domestic Subsidiary of the Borrower (the “New Grantor”) is executing this Supplement in accordance with the requirements of the Credit Agreement to become a Grantor under the Security Agreement.

Accordingly, the Administrative Agent and the New Grantor agree as follows:

SECTION 1. In accordance with Section 7.10 of the Security Agreement, the New Grantor by its signature below becomes a Grantor under the Security Agreement with the same force and effect as if originally named therein as a Grantor and the New Grantor hereby agrees (a) to all the terms and provisions of the Security Agreement applicable to it as a Grantor thereunder and (b) represents and warrants that the representations and warranties made by it as a Grantor thereunder are true and correct on and as of the date hereof. In furtherance of the foregoing, the New Grantor, as security for the payment and performance in full of the Secured Obligations (as defined in the Credit Agreement), does hereby create and grant to the Administrative Agent, its successors and assigns, for the benefit of the Secured Parties, their successors and assigns as provided in the Security Agreement, a continuing security interest in and Lien on all of the New Grantor’s right, title and interest in and to the Collateral (as defined in the Security Agreement) of the New Grantor. Each reference to a “Grantor” in the Security Agreement shall be deemed to include the New Grantor. The Security Agreement is hereby incorporated herein by reference.

SECTION 2. The New Grantor represents and warrants to the Administrative Agent and the other Secured Parties that this Supplement has been duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms (subject to applicable bankruptcy, reorganization, insolvency, moratorium or similar laws affecting creditors’ rights generally and subject, as to enforceability, to equitable principles of general application (regardless of whether enforcement is sought in a proceeding in equity or at law)).

Security Agreement

Annex 1

SECTION 3. This Supplement may be executed in counterparts, each of which shall constitute an original, but all of which when taken together shall constitute a single contract. This Supplement shall become effective when the Administrative Agent shall have received counterparts of this Supplement that, when taken together, bear the signatures of the New Grantor and the Administrative Agent. Delivery of an executed signature page to this Supplement by facsimile or other electronic transmission shall be as effective as delivery of a manually signed counterpart of this Supplement.

SECTION 4. The New Grantor hereby agrees that the schedules attached to the Security Agreement are hereby supplemented by the corresponding schedules attached to this Supplement. The New Grantor hereby represents and warrants that the information provided in the schedules attached hereto are true and correct as of the date hereof.

SECTION 5. The New Grantor hereby expressly acknowledges and agrees to the terms of Section 6.3. (Indemnity and Expenses) of the Security Agreement.

SECTION 6. Except as expressly supplemented hereby, the Security Agreement shall remain in full force and effect.

SECTION 7. In case one or more provisions of this Supplement shall be invalid, illegal or unenforceable in any respect under any applicable law, the validity, legality, and enforceability of the remaining provisions contained herein or therein shall not be affected or impaired thereby.

SECTION 8. All communications and notices hereunder shall be in writing and given as provided in the Security Agreement. All communications and notices hereunder to the New Grantor shall be given to it at the address set forth under its signature hereto.

SECTION 9. The New Grantor agrees to reimburse the Administrative Agent for its reasonable out-of-pocket costs and expenses in connection with this Supplement, including the reasonable fees and out-of-pocket expenses of outside counsel for the Administrative Agent.

SECTION 10. Governing Law. This Security Agreement shall be governed by, and construed and enforced in accordance with, the laws of the State of Texas.

SECTION 11. Submission to Jurisdiction. EACH GRANTOR HEREBY IRREVOCABLY SUBMITS TO THE JURISDICTION OF ANY TEXAS STATE OR FEDERAL COURT SITTING IN HOUSTON, TEXAS IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS SECURITY AGREEMENT OR THE OTHER CREDIT DOCUMENTS, AND EACH GRANTOR HEREBY IRREVOCABLY AGREES THAT ALL CLAIMS IN RESPECT OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN SUCH COURT. EACH CREDIT PARTY HEREBY UNCONDITIONALLY AND IRREVOCABLY WAIVES, TO THE FULLEST EXTENT IT MAY EFFECTIVELY DO SO, ANY RIGHT IT MAY HAVE TO THE DEFENSE OF AN INCONVENIENT FORUM TO THE MAINTENANCE OF SUCH ACTION OR PROCEEDING. EACH GRANTOR HEREBY AGREES THAT SERVICE OF COPIES OF THE SUMMONS AND COMPLAINT AND ANY OTHER PROCESS WHICH MAY BE SERVED IN ANY SUCH ACTION OR PROCEEDING MAY BE MADE BY MAILING OR DELIVERING A COPY OF SUCH PROCESS TO SUCH GRANTOR AT ITS ADDRESS SET FORTH IN THIS SUPPLEMENT. EACH GRANTOR HEREBY AGREES THAT A FINAL JUDGMENT IN ANY SUCH ACTION OR PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER JURISDICTIONS BY SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER PROVIDED BY LAW. NOTHING IN THIS SECTION SHALL AFFECT THE RIGHTS OF ANY LENDER TO SERVE LEGAL PROCESS IN ANY OTHER MANNER PERMITTED BY THE LAW OR AFFECT THE RIGHT OF ANY LENDER TO BRING ANY ACTION OR PROCEEDING AGAINST ANY GRANTOR OR ITS PROPERTY IN THE COURTS OF ANY OTHER JURISDICTION.

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SECTION 12. Waiver of Jury. EACH GRANTOR, THE LENDERS, THE ADMINISTRATIVE AGENT, THE ISSUING LENDER, AND THE SWING LINE LENDER HEREBY IRREVOCABLY WAIVE ANY AND ALL RIGHT TO TRIAL BY JURY IN RESPECT OF ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS SUPPLEMENT, ANY OTHER CREDIT DOCUMENT, OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREBY.

THIS SUPPLEMENT, THE SECURITY AGREEMENT AND THE OTHER CREDIT DOCUMENTS, AS DEFINED IN THE CREDIT AGREEMENT REFERRED TO IN THIS SUPPLEMENT, REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.

THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES HERETO.

IN WITNESS WHEREOF, the New Grantor and the Administrative Agent have duly executed this Supplement to the Security Agreement as of the day and year first above written.

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SCHEDULES TO SUPPLEMENT NO. 1

[AS APPROPRIATE]

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