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As filed with the Securities and Exchange Commission on October 4, 2016

Registration No. 333-            

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Concho Resources Inc.

(Exact name of registrant as specified in its charter)

One Concho Center

600 W. Illinois Avenue

Midland, Texas 79701

(432) 683-7443

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Travis L. Counts

Vice President and General Counsel

One Concho Center

600 W. Illinois Avenue

Midland, Texas 79701

(432) 683-7443

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

W. Matthew Strock

Vinson & Elkins L.L.P.

1001 Fannin, Suite 2500

Houston, Texas 77002

(713) 758-2222

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box:  ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box:  ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.  ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

CALCULATION OF REGISTRATION FEE

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PROSPECTUS

Concho Resources Inc.

3,919,685 Shares

Common Stock

This prospectus relates to the offer and sale from time to time by the selling stockholders named in this prospectus of up to an aggregate of 3,919,685 shares of our common stock. The 3,919,685 shares were sold to the selling stockholders through a private transaction that was consummated on October 4, 2016. Each selling stockholder may sell none, some or all of the shares owned by such selling stockholder and offered by this prospectus. Sales may be at fixed prices, which may be changed, at prices related to the prevailing market prices at the time of sale or at negotiated prices. Such sales may occur in transactions on the New York Stock Exchange (the “NYSE”), in the over-the-counter market or through negotiated transactions or in a combination of these methods. We will not receive any of the proceeds from the sale of the shares covered by this prospectus.

Our common stock is listed on the NYSE under the symbol “CXO.” On October 3, 2016, the last reported sale price of our shares on the NYSE was $137.66 per share.

Investing in any of our securities involves risk. Please read carefully the information included and incorporated by reference in this prospectus and in any applicable prospectus supplement for a discussion of the factors you should consider before deciding to purchase our securities. See “Risk Factors” beginning on page 5 of this prospectus.

Our principal executive offices are located at One Concho Center, 600 W. Illinois Avenue, Midland, Texas 79701, and our phone number is (432) 683-7443.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is October 4, 2016

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You should rely only on the information contained in or incorporated by reference into this prospectus and any accompanying prospectus supplement. Neither we nor the selling stockholders have authorized any dealer, salesman or other person to provide you with additional or different information. If anyone provides you with different or inconsistent information, you should not rely on it. This prospectus and any accompanying prospectus supplement are not an offer to sell or the solicitation of an offer to buy any securities other than the securities to which they relate and are not an offer to sell or the solicitation of an offer to buy securities in any jurisdiction to any person to whom it is unlawful to make an offer or solicitation in that jurisdiction. You should not assume that the information contained in this prospectus or any accompanying prospectus supplement is accurate as of any date other than the date on the front cover of this prospectus or any accompanying prospectus supplement, or that the information contained in any document incorporated by reference is accurate as of any date other than the date of such document, regardless of the time of delivery of this prospectus or any sale of a security.

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (the “SEC”) utilizing a “shelf” registration process. Under this shelf registration process, the selling stockholders may, from time to time, sell the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities that may be offered, from time to time, by such selling stockholders. Each time a selling stockholder sells securities, the selling stockholder may be required to provide you with this prospectus and, in certain cases, an accompanying prospectus supplement containing specific information about such selling stockholder and the terms of the securities being offered. That prospectus supplement may include additional risk factors or other special considerations applicable to those securities. Any accompanying prospectus supplement may also add, update or change information in this prospectus. If there is any inconsistency between the information in this prospectus and any accompanying prospectus supplement, you should rely on the information in that prospectus supplement.

Additional information, including our consolidated financial statements and the notes thereto, is incorporated in this prospectus by reference to our reports filed with the SEC. Please read “Where You Can Find More Information” below. You are urged to read this prospectus carefully, including the “Risk Factors” section, any prospectus supplement and the documents incorporated by reference herein in their entirety before investing in our securities.

Unless the context requires otherwise or unless otherwise noted, all references in this prospectus or any accompanying prospectus supplement to “Concho,” the “Company,” “we,” “us” or “our” are to Concho Resources Inc. and its subsidiaries.

THE COMPANY

We are an independent oil and natural gas company engaged in the acquisition, development, exploration and production of oil and natural gas properties. Our core operations are focused in the Permian Basin of Southeast New Mexico and West Texas. Our legacy in the Permian Basin provides us a deep understanding of operating and geological trends. We are also at the forefront of applying new technologies, such as horizontal drilling and enhanced completion techniques, throughout our three core operating areas: the New Mexico Shelf, the Delaware Basin and the Midland Basin. On the New Mexico Shelf, we primarily target the Yeso formation with horizontal drilling; in the Delaware Basin, we use horizontal drilling to target the Bone Spring formation (including the Avalon shale and the Bone Spring sands) and the Wolfcamp shale formation; and in the Midland Basin, we target the Wolfcamp and Spraberry formations with horizontal drilling. Our strategy remains focused on drilling and exploration activities on our multi-year project inventory and pursuing acquisitions that meet our strategic and financial objectives.

We are a Delaware corporation formed in February 2006. Our principal executive offices are located at One Concho Center, 600 W. Illinois Avenue, Midland, Texas 79701. Our common stock is listed on the NYSE under the symbol “CXO.”

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports and other information with the SEC (File No. 001-33615) pursuant to the Securities Exchange Act of 1934 (the “Exchange Act”). You may read and copy any documents that are filed at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may also obtain copies of these documents at prescribed rates from the public reference section of the SEC at its Washington address. Please call the SEC at 1-800-SEC-0330 for further information on the operation of the Public Reference Room.

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Our filings are also available to the public through the SEC’s website at http://www.sec.gov.

The SEC allows us to “incorporate by reference” information that we file with it, which means that we can disclose important information to you by referring you to documents previously filed with the SEC. The information incorporated by reference is an important part of this prospectus, and the information that we later file with the SEC will automatically update and supersede this information. The following documents we filed with the SEC pursuant to the Exchange Act are incorporated herein by reference:

These reports contain important information about us, our financial condition and our results of operations.

All documents subsequently filed pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act (excluding any information furnished pursuant to Item 2.02 or Item 7.01 on any Current Report on Form 8-K) before the termination of each offering under this prospectus shall be deemed to be incorporated in this prospectus by reference and to be a part hereof from the date of filing of such documents. Any statement contained herein, or in a document incorporated or deemed to be incorporated by reference herein, shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein or in any subsequently filed document that also is or is deemed to be incorporated by reference herein, modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

You may request a copy of these filings at no cost by writing or telephoning us at the following address and telephone number:

Concho Resources Inc.

One Concho Center

600 West Illinois Avenue

Midland, Texas 79701

Attention: General Counsel

(432) 683-7443

We maintain a web site at http://www.concho.com. The information on our website, however, is not part of this prospectus.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

Various statements and information contained in or incorporated by reference into this prospectus that express a belief, expectation, or intention, or that are not statements of historical fact, are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 (the “Securities Act”) and Section 21E of the Exchange Act. These forward-looking statements include statements, projections and estimates concerning our future financial position, operations, performance, business strategy, oil and natural gas reserves, drilling program, capital expenditures, liquidity and capital resources, the timing and success of specific projects, outcomes and effects of litigation, claims and disputes, derivative activities and potential financing. Forward-looking statements are generally accompanied by words such as “estimate,” “project,” “predict,” “believe,” “expect,” “anticipate,” “potential,” “could,” “may,” “foresee,” “plan,” “goal” or other words that convey the uncertainty of future events or outcomes. Forward-looking statements are not guarantees of performance. We have based these forward-looking statements on our current expectations and assumptions about future events and their potential effect on us. These statements are based on certain assumptions and analyses made by us in light of our experience and our perception of historical trends, current conditions and expected future developments as well as other factors we believe are appropriate under the circumstances. Actual results may differ materially from those implied or expressed by any forward-looking statements. These forward-looking statements speak only as of the date of this prospectus, or if earlier, as of the date they were made. We disclaim any obligation to update or revise these statements unless required by law, and we caution you not to rely on them unduly. While our management considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory and other risks, contingencies and uncertainties relating to, among other matters, the risks discussed under the heading “Risk Factors” in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2016 and in our Annual Report on Form 10-K for the year ended December 31, 2015, in the other documents incorporated by reference herein and in our subsequent SEC filings, as well as those factors summarized below:

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Reserve engineering is a process of estimating underground accumulations of oil and natural gas that cannot be measured in an exact way. The accuracy of any reserve estimate depends on the quality of available data, the interpretation of such data and the price and cost assumptions made by our reserve engineers. In addition, the results of drilling, testing and production activities may justify revisions of estimates that were made previously. If significant, such revisions would change the schedule of any further production and development drilling. Accordingly, reserve estimates may differ from the quantities of oil and natural gas that are ultimately recovered.

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RISK FACTORS

An investment in our securities involves a significant degree of risk. Before you invest in our securities you should carefully consider those risk factors included in our most recent Annual Report on Form 10-K, any subsequently filed Quarterly Reports on Form 10-Q and any subsequently filed Current Reports on Form 8-K, which are incorporated herein by reference, and those risk factors that may be included in any applicable prospectus supplement, together with all of the other information included in this prospectus, any prospectus supplement and the documents we incorporate by reference, in evaluating an investment in our securities. If any of the risks discussed in the foregoing documents were to occur, our business, financial condition, results of operations and cash flows could be materially adversely affected. Please read “Cautionary Statement Regarding Forward-Looking Statements.”

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USE OF PROCEEDS

We will incur all of the costs associated with the registration of the shares offered by this prospectus other than underwriting discounts and selling commissions, if any. Please read “Plan of Distribution.”

The shares offered by this prospectus are being registered for the account of the selling stockholders named in this prospectus. Therefore, any proceeds from the sale of our shares will be received by the selling stockholders for their own account, and we will not receive any of the proceeds from any sale of our shares offered by this prospectus.

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DESCRIPTION OF CAPITAL STOCK

The following summary of our capital stock, Restated Certificate of Incorporation (the “Certificate of Incorporation”) and Second Amended and Restated Bylaws (the “Bylaws”) does not purport to be complete and is qualified in its entirety by reference to the provisions of applicable law and to our Certificate of Incorporation and Bylaws.

Our authorized capital stock consists of 300,000,000 shares of common stock, $0.001 par value per share, and 10,000,000 shares of preferred stock, $0.001 par value per share.

Common Stock

As of September 29, 2016, we had 142,133,210 shares of common stock outstanding, including 1,158,661 shares of restricted stock. The shares of restricted stock have voting rights and rights to receive dividends and are subject to certain forfeiture restrictions.

Our common stock commenced trading on the NYSE under the symbol “CXO” on August 3, 2007, in connection with our initial public offering. As of September 29, 2016, there were approximately 1,100 holders of record of our common stock.

Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders and do not have cumulative voting rights. Accordingly, holders of a majority of the shares of our common stock entitled to vote in any election of directors may elect all of the directors standing for election.

Holders of our common stock are entitled to receive proportionately any dividends if and when such dividends are declared by our board of directors, subject to any preferential dividend rights of preferred stock that may be outstanding at the time such dividends are declared. Upon the liquidation, dissolution or winding up of our company, the holders of our common stock are entitled to receive ratably our net assets available after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock. Holders of our common stock have no preemptive, subscription, redemption or conversion rights. The rights, preferences and privileges of holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of preferred stock that we may designate and issue in the future.

We have not paid, and do not intend to pay in the foreseeable future, cash dividends on our common stock. Covenants contained in our credit facility and the indentures governing our senior notes limit the payment of dividends on our common stock. We currently intend to retain all future earnings to fund the development and growth of our business. Any payment of future dividends will be at the discretion of our board of directors and will depend on, among other things, our earnings, financial condition, capital requirements, level of indebtedness, statutory and contractual restrictions applying to the payment of dividends and other considerations that our board of directors deems relevant.

There are no redemption or sinking fund provisions applicable to our common stock. All outstanding shares of our common stock are fully paid and non-assessable.

Preferred Stock

Under the terms of our Certificate of Incorporation, our board of directors is authorized to designate and issue shares of preferred stock in one or more series without further vote or action by our stockholders. Our board of directors has the discretion to determine the rights, preferences, privileges and restrictions, including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences, of each series of

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preferred stock. It is not possible to state the actual effect of the issuance of any shares of preferred stock upon the rights of holders of the common stock until the board of directors determines the specific rights of the holders of the preferred stock. However, these effects might include:

We currently have no shares of preferred stock outstanding, and we have no present plans to issue any shares of preferred stock.

Anti-takeover Provisions of our Certificate of Incorporation and Bylaws

Our Certificate of Incorporation and Bylaws contain several provisions that could delay or make more difficult the acquisition of us through a hostile tender offer, open market purchases, proxy contest, merger or other takeover attempt that a stockholder might consider to be in its best interest, including those attempts that might result in a premium over the market price of our common stock.

No Actions by Written Consent of Stockholders

Our Certificate of Incorporation and Bylaws provide that any action required or permitted to be taken by our stockholders must be taken at a duly called meeting of stockholders and not by written consent.

Special Meetings of Stockholders

Subject to the rights of the holders of any series of preferred stock, our Bylaws provide that special meetings of the stockholders may be called only by the chairman of the board of directors or by the resolution of our board of directors approved by a majority of the total number of authorized directors. No business other than that stated in a notice may be transacted at any special meeting.

Advance Notice Procedure for Director Nominations and Stockholder Proposals

Our Bylaws provide that adequate notice must be given to nominate candidates for election as directors or to make proposals for consideration at annual meetings of our stockholders. For nominations or other business to be properly brought before an annual meeting by a stockholder, the stockholder must have delivered a written notice to the Secretary of our company at our principal executive offices not less than 90 calendar days nor more than 120 calendar days prior to the first anniversary of the date on which we first mailed our proxy materials for the preceding year’s annual meeting. However, in the event that the date of the annual meeting is more than 30 calendar days before or more than 30 calendar days after the first anniversary of the date of the preceding year’s annual meeting, notice by the stockholder, to be timely, must be so delivered not later than the close of business on the 90th calendar day prior to such annual meeting or, if later, the 10th calendar day following the calendar day on which public announcement, if any, of the date of such meeting is first made by us.

Nominations of persons for election to our board of directors may be made at a special meeting of stockholders at which directors are to be elected pursuant to our notice of meeting (i) by or at the direction of our board of directors, or (ii) by any stockholder of our company who is a stockholder of record at the time of the giving of notice of the meeting who is entitled to vote at the meeting and who complies with the notice procedures set forth in our Bylaws. In the event we call a special meeting of stockholders for the purpose of electing one or more directors to our board of directors, any stockholder may nominate a person or persons (as the case may be) for election to such position(s) if the stockholder provides written notice to the Secretary of our company at our principal executive offices not earlier than the close of business on the 90th calendar day prior to

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such special meeting, nor later than the close of business on the 70th calendar day prior to such special meeting or, if later, the 10th calendar day following the day on which public announcement, if any, is first made of the date of the special meeting and of the nominees proposed by our board of directors to be elected at such meeting.

These procedures may operate to limit the ability of stockholders to bring business before a stockholders’ meeting, including the nomination of directors and the consideration of any transaction that could result in a change in control and that may result in a premium to our stockholders.

Classified Board

Our Certificate of Incorporation divides our directors into three classes serving staggered three-year terms. As a result, stockholders will elect approximately one-third of the board of directors each year. This provision, when coupled with provisions of our Certificate of Incorporation authorizing only the board of directors to fill vacant or newly created directorships or increase the size of the board of directors and provisions providing that directors may be removed only for cause and then only by the holders of not less than 66²/₃ percent of the voting power of all outstanding voting stock, may deter a stockholder from gaining control of our board of directors by removing incumbent directors or increasing the number of directorships and simultaneously filling the vacancies or newly created directorships with its own nominees.

Authorized Capital Stock

Our Certificate of Incorporation contains provisions stating that the authorized but unissued shares of common stock and preferred stock are available for future issuance, subject to various limitations imposed by the NYSE. These additional shares may be utilized for a variety of corporate purposes, including public offerings to raise capital, corporate acquisitions and employee benefit plans. The existence of authorized but unissued shares of common stock and preferred stock could make it more difficult or discourage an attempt to obtain control of our company by means of a proxy contest, tender offer, merger or otherwise.

Amendment of Bylaws

Under Delaware law, the power to adopt, amend or repeal bylaws is conferred upon the stockholders. A corporation may, however, in its certificate of incorporation, also confer upon the board of directors the power to adopt, amend or repeal its bylaws. Our Certificate of Incorporation and Bylaws grant our board of directors the power to adopt, amend and repeal our Bylaws on the affirmative vote of a majority of the directors then in office. Our stockholders may adopt, amend or repeal our Bylaws, but only at any regular meeting of stockholders, or at a special meeting of stockholders called for that purpose, by the holders of not less than 66²/₃ percent of the voting power of all outstanding voting stock.

Certain Oil and Natural Gas Opportunities

Certain of our stockholders who received shares of common stock in connection with our formation and our non-employee directors may from time to time have investments in other exploration and production companies that may compete with us. Our Certificate of Incorporation and our Business Opportunities Agreement provide a safe harbor under which these entities and directors may participate in the oil and gas exploration, exploitation, development and production business without breaching their fiduciary duties as controlling stockholders or directors. No participation is allowed with respect to:

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The covered individuals and entities have no obligation to offer such opportunities to us, but interested directors are required to disclose conflicts of interest. We are not prohibited from pursuing any business opportunity with respect to which we have renounced any interest.

Limitation of Liability of Directors

Our Certificate of Incorporation provides that no director shall be personally liable to us or our stockholders for monetary damages for breach of fiduciary duty as a director, except for liability as follows:

The effect of these provisions is to eliminate our rights and our stockholders’ rights, through stockholders’ derivative suits on our behalf, to recover monetary damages against a director for a breach of fiduciary duty as a director, including breaches resulting from grossly negligent behavior, except in the situations described above.

Delaware Takeover Statute

We are subject to Section 203 of the Delaware General Corporation Law (“DGCL”), which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

In general, Section 203 of the DGCL defines a “business combination” to include the following:

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In general, Section 203 of the DGCL defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or within three years prior to the time of determination of interested stockholder status did own, 15 percent or more of the outstanding voting stock of the corporation.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is American Stock Transfer & Trust Company, LLC.

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SELLING STOCKHOLDERS

This prospectus covers the offering for resale from time to time of up to 3,919,685 shares of our common stock owned by the selling stockholders listed in the table below. As used herein, “selling stockholders” means the selling stockholders listed in the table below as well as their transferees, donees, pledgees or other successors in interest.

No offer or sale under this prospectus may be made by a stockholder other than the selling stockholders named herein, in a supplement to this prospectus or in an amendment to the related registration statement that has become effective under the Securities Act. We may supplement or amend this prospectus to include additional selling stockholders upon request and upon provision of all required information to us.

The following table sets forth the name of each selling stockholder, the maximum number of shares of our common stock to be sold by each selling stockholder and the number of shares of our common stock to be owned by each selling stockholder after completion of the offering. Other than the acquisition from the selling stockholders by our wholly owned subsidiary of certain oil and gas properties and assets in an arm’s length transaction and the related transactions entered into between the parties in connection with that acquisition, none of the selling stockholders has had any material relationship with us or with any of our predecessors or affiliates within the past three years. Except as otherwise indicated in the footnotes to the following table, each selling stockholder has sole voting and dispositive power with respect to such shares.

We do not know when or in what amounts the selling stockholders may offer their shares for sale, if at all. Because the selling stockholders may offer all, some or none of their shares pursuant to this prospectus and because we are unaware of any agreements, arrangements or understanding with respect to the sale of any such shares, no definitive estimate can be provided as to the number of shares that will be held, or percentage of shares beneficially owned, by each selling stockholder after completion of any offerings pursuant to this prospectus. For purposes of the table below, the information regarding shares of common stock owned after the offering assumes the sale of all shares offered by the selling stockholders and that the selling stockholders do not acquire any additional shares.

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The information in the below table is based on information provided by or on behalf of each of the selling stockholders to us in a selling stockholder questionnaire and is as of the date specified by each selling stockholder in such questionnaire. We have not sought to verify such information. Additionally, the selling stockholders may have sold or transferred some or all of their shares in exempt or non-exempt transactions since the date of this prospectus. Other information about the selling stockholders may also change over time. Any changed information will be set forth in supplements to this prospectus, if required. None of the selling stockholders is a broker-dealer registered under Section 15 of the Exchange Act or an affiliate of a broker-dealer registered under Section 15 of the Exchange Act.

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PLAN OF DISTRIBUTION

We are registering shares of common stock to permit the resale of such shares by the selling stockholders from time to time after the date of this prospectus. We will not receive any of the proceeds from the sale of the shares of common stock by the selling stockholders.

Each selling stockholder may sell all or a portion of the shares beneficially owned by such selling stockholder and offered hereby from time to time directly or through one or more underwriters, broker-dealers or agents. If the shares are sold through underwriters or broker-dealers, the selling stockholder will be responsible for underwriting discounts or commissions or agent’s commissions. The shares may be sold in one or more transactions at fixed prices, at the prevailing market price at the time of the sale, at varying prices determined at the time of sale, or at negotiated prices. These sales may be effected by each selling stockholder in transactions that involve one or more of the following methods (which may include block transactions or crosses):

If a selling stockholder effects such transactions by selling shares to or through underwriters, broker-dealers or agents, such underwriters, broker-dealers or agents may receive commissions in the form of discounts, concessions or commissions from that selling stockholder or commissions from purchasers of the shares for whom they may act as agent or to whom they may sell as principal (which discounts, concessions or commissions as to particular underwriters, broker-dealers or agents may be in excess of those customary in the types of transactions involved). In connection with sales of the shares or otherwise, each selling stockholder may enter into hedging transactions with broker-dealers, which may in turn engage in short sales of the shares in the course of hedging in positions they assume. Each selling stockholder may also sell shares short and deliver shares covered by this prospectus to close out short positions and to return borrowed shares in connection with such short sales. Each selling stockholder may also loan or pledge shares to broker-dealers that in turn may sell such shares.

One or more of the selling stockholders may pledge or grant a security interest in some or all of the shares owned by them. If a selling stockholder defaults in the performance of its secured obligations, the pledgees or secured parties may offer and sell the shares from time to time pursuant to this prospectus or any amendment to

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this prospectus under Rule 424(b)(3) or other applicable provision of the Securities Act, and we will amend, if necessary, the name of such selling stockholder to include the pledgee, transferee or other successors in interest as selling stockholder(s) under this prospectus. Each selling stockholder also may transfer and donate the shares in other circumstances in which case the transferees, donees, pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.

Each selling stockholder and any broker-dealer participating in the distribution of the shares may be deemed to be “underwriters” within the meaning of the Securities Act, and any commission paid, or any discounts or concessions allowed to, any such broker-dealer may be deemed to be underwriting commissions or discounts under the Securities Act. At the time a particular offering of the shares is made, a prospectus supplement, if required, will be distributed which will set forth the aggregate amount of shares being offered and the terms of the offering, including the name or names of any broker-dealers or agents, any discounts, commissions and other terms constituting compensation from such selling stockholder and any discounts, commissions or concessions allowed or reallowed or paid to broker-dealers.

Under the securities laws of some states, the shares may be sold in such states only through registered or licensed brokers or dealers. In addition, in some states the shares may not be sold unless such shares have been registered or qualified for sale in such state or an exemption from registration or qualification is available and is complied with.

There can be no assurance that the selling stockholders will sell any or all of the shares registered pursuant to the registration statement of which this prospectus forms a part.

Each selling stockholder and any other person participating in a distribution of shares covered by this prospectus will be subject to applicable provisions of the Exchange Act or the Securities Act, and the rules and regulations thereunder, including, without limitation, Regulation M of the Exchange Act, which may limit the timing of purchases and sales of any of the shares by such selling stockholder and any other participating person. Regulation M may also restrict the ability of any person engaged in the distribution of the shares to engage in market-making activities with respect to the shares. All of the foregoing may affect the marketability of the shares and the ability of any person or entity to engage in market-making activities with respect to the shares.

We will pay all expenses of the registration of the shares, including, without limitation, SEC filing fees and expenses of compliance with state securities or “blue sky” laws; provided, however, that each selling stockholder will pay all applicable underwriting discounts and selling commissions, if any.

Once sold under the registration statement of which this prospectus forms a part, the shares will be freely tradable in the hands of persons other than our affiliates.

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LEGAL MATTERS

Certain legal matters in connection with the securities offered hereby will be passed upon by Vinson & Elkins L.L.P., Houston, Texas, as our counsel.  Any underwriter or agent will be advised about other issues relating to any offering by its own legal counsel.

EXPERTS

The audited consolidated financial statements and management’s assessment of the effectiveness of internal control over financial reporting incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance upon the reports of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

Certain estimates of our net oil and natural gas reserves and related information incorporated by reference in this prospectus have been derived from reports prepared by Cawley, Gillespie & Associates, Inc. and Netherland, Sewell & Associates, Inc. All such information has been so incorporated by reference on the authority of such firms as experts regarding the matters contained in their reports.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Set forth below are the expenses, other than underwriting discounts and commissions, expected to be incurred in connection with the issuance and distribution of the securities registered hereby. All such expenses will be incurred by us and not by the selling stockholders. With the exception of the SEC registration fee, the amounts set forth below are estimates.

The general effect of the following provisions is to provide indemnification to officers, directors and control persons for liabilities that may arise by reason of their status as officers, directors or control persons, other than liabilities arising from willful or intentional misconduct, acts or omissions not in good faith, unlawful distributions of corporate assets or transactions from which the officers, directors or control persons derived an improper personal benefit.

Section 145 of the DGCL provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that such person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe his conduct was unlawful. Section 145 further provides that a corporation similarly may indemnify any such person serving in any such capacity who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that such person is or was a director, officer, employee or agent of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees) actually and reasonably incurred in connection with the defense or settlement of such action or suit if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Delaware Court of Chancery or such other court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all of the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Delaware Court of Chancery or such other court shall deem proper.

Delaware law provides that directors of a corporation will not be personally liable to the corporation or its stockholders for monetary damages for breach of their fiduciary duties as directors, except for liability:

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Our Certificate of Incorporation provides that we shall indemnify our officers and directors to the extent provided in our Bylaws. In turn, our Bylaws provide that we will indemnify and hold harmless, to the fullest extent permitted by the DGCL, any of our officers or directors (including those persons serving as an officer or director of another entity at our request) who is party to a suit or other proceeding by reason of his or her position as an officer or director against all reasonably incurred expense, liability or loss. We may only indemnify an officer or director who brought the suit or proceeding if our board of directors had previously authorized such suit or proceeding. The rights to indemnification provided by our Bylaws include the right to advancement of expenses to the fullest extent permitted by the DGCL. In addition, our Bylaws allow us to indemnify our non-officer employees and agents to the extent (i) permitted by the DGCL and (ii) authorized by our Chief Executive Officer and at least one other authorized officer.

We have also entered into indemnification agreements with all of our directors and executive officers. These indemnification agreements are intended to permit indemnification to the fullest extent now or hereafter permitted by the DGCL. It is possible that the applicable law could change the degree to which indemnification is expressly permitted.

The indemnification agreements cover expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement incurred as a result of the fact that such person, in his or her capacity as a director or officer, is made or threatened to be made a party to any suit or proceeding. The indemnification agreements generally cover claims relating to the fact that the indemnified party is or was an officer, director, employee or agent of us or any of our affiliates, or is or was serving at our request in such a position for another entity. The indemnification agreements also obligate us to promptly advance all reasonable expenses incurred in connection with any claim. The indemnitee is, in turn, obligated to reimburse us for all amounts so advanced if it is later determined that the indemnitee is not entitled to indemnification. The indemnification provided under the indemnification agreements is not exclusive of any other indemnity rights; however, double payment to the indemnitee is prohibited.

We are not obligated to indemnify the indemnitee with respect to claims brought by the indemnitee against:

We have obtained director and officer liability insurance for the benefit of each of the indemnitees. These policies include coverage for losses for wrongful acts and omissions and to ensure our performance under the indemnification agreements. Each of the indemnitees are insured under such policies and provided with the same rights and benefits as are accorded to the most favorably insured of our directors and officers.

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(a) The following documents are filed as exhibits to this registration statement:

The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high and of the estimated maximum offering price may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in this registration statement or any material change to such information in this registration statement;

Provided, however, that paragraphs (1)(i), (1)(ii) and (1)(iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is a part of the registration statement.

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(2) That, for the purpose of determining any liability under the Securities Act each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability under the Securities Act to any purchaser:

(i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was a part of the registration statement or made in any such document immediately prior to such effective date.

The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to existing provisions or arrangements whereby the registrant may indemnify a trustee, officer or controlling person of the registrant against liabilities arising under the Securities Act, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a trustee, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such trustee, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Midland, State of Texas, on October 4, 2016.

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POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Timothy A. Leach, C. William Giraud and Travis L. Counts, and each of them severally, his true and lawful attorney or attorneys-in-fact and agents, with full power to act with or without the others and with full power of substitution and resubstitution, to execute in his name, place and stead, in any and all capacities, any or all amendments (including pre-effective and post-effective amendments) to this registration statement and any registration statement for the same offering filed pursuant to Rule 462 under the Securities Act of 1933, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents and each of them, full power and authority to do and perform in the name of and on behalf of the undersigned, in any and all capacities, each and every act and thing necessary or desirable to be done in connection herewith, to all intents and purposes and as fully as they might or could do in person, hereby ratifying, approving and confirming all that said attorneys-in-fact and agents or their substitutes may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

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Exhibits Index

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Exhibit 5.1

October 4, 2016    

Concho Resources Inc.

One Concho Center

600 W. Illinois Avenue

Midland, Texas 79701

Re: Registration Statement on Form S-3

Ladies and Gentlemen:

We have acted as counsel to Concho Resources Inc., a Delaware corporation (the “Company”), in connection with the preparation and filing of a registration statement on Form S-3 (the “Registration Statement”) filed on the date hereof with the Securities and Exchange Commission (the “Commission”) in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), relating to the proposed offer and sale (the “Offering”) by the selling stockholders (the “Selling Stockholders”) of up to 3,919,685 shares of common stock, par value $0.001 per share, of the Company (the “Common Shares”).

In connection with this opinion, we have assumed that (i) the Registration Statement, and any amendments thereto (including post-effective amendments), will have become effective and (ii) the Common Shares will be sold in the manner described in the Registration Statement.

In connection with the opinion expressed herein, we have examined, among other things, (i) the Restated Certificate of Incorporation and the Amended and Restated Bylaws of the Company, (ii) the records of corporate proceedings that have occurred prior to the date hereof with respect to the Offering, (iii) the Registration Statement and (iv) such other certificates, instruments and documents as we considered appropriate for purposes of the opinion hereafter expressed. We have also reviewed such questions of law as we have deemed necessary or appropriate. As to matters of fact relevant to the opinion expressed herein, and as to factual matters arising in connection with our examination of corporate documents, records and other documents and writings, we relied upon certificates and other communications of corporate officers of the Company, without further investigation as to the facts set forth therein. We have also assumed the genuineness of all signatures, the legal capacity of all natural persons, the authenticity of all documents submitted to us as originals and the conformity to original documents of all documents submitted to us as copies.

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Based upon the foregoing, we are of the opinion that the Common Shares proposed to be sold by the Selling Stockholder are duly authorized, validly issued, fully paid and nonassessable.

The foregoing opinions are limited in all respects to the General Corporation Law of the State of Delaware (including the applicable provisions of the Delaware Constitution and the reported judicial decisions interpreting these laws) and the federal laws of the United States of America, and we do not express any opinions as to the laws of any other jurisdiction.

We hereby consent to the references to this firm under the caption “Legal Matters” in the prospectus forming a part of the Registration Statement and to the filing of this opinion as an exhibit to the Registration Statement, but we do not thereby admit that we are within the category of persons whose consent is required under the provisions of the Securities Act.

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated February 25, 2016 with respect to the consolidated financial statements and internal control over financial reporting of Concho Resources Inc. included in the Annual Report on Form 10-K for the year ended December 31, 2015, which are incorporated by reference in this Registration Statement. We consent to the incorporation by reference of the aforementioned reports in this Registration Statement, and to the use of our name as it appears under the caption “Experts.”

/s/ GRANT THORNTON LLP

Tulsa, Oklahoma

October 4, 2016

Exhibit 23.3

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

The undersigned hereby consents to the references to our firm in the form and context in which they appear in this Registration Statement on Form S-3 of Concho Resources Inc. and the related prospectus that is a part thereof. We hereby further consent to the use in such Registration Statement and prospectus of information contained in our report setting forth the estimates of revenues from Concho Resources Inc.’s oil and gas reserves as of December 31, 2015. We further consent to the reference to this firm under the heading “Experts”.

Dallas, Texas

October 4, 2016

Exhibit 23.4

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

The undersigned hereby consents to the references to our firm in the form and context in which they appear in this Registration Statement on Form S-3 of Concho Resources Inc. and the related prospectus that is a part thereof. We hereby further consent to the use in such Registration Statement and prospectus of information contained in our report setting forth the estimates of revenues from Concho Resources Inc.’s oil and gas reserves as of December 31, 2015. We further consent to the reference to this firm under the heading “Experts”.

Fort Worth, Texas

October 4, 2016