S-3ASR

As filed with the Securities and Exchange Commission on August 5, 2020.

Registration No. 333-                

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

PIONEER NATURAL RESOURCES COMPANY

(Exact name of registrant as specified in its charter)

Delaware	75-2702753
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification no.)

777 Hidden Ridge

Irving, Texas 75038

(972) 444-9001

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

Mark H. Kleinman

Executive Vice President and General Counsel

Pioneer Natural Resources Company

777 Hidden Ridge

Irving, Texas 75038

(972) 444-9001

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

Copies to:

Robert L. Kimball

Vinson & Elkins LLP

3900 Trammell Crow Center

2001 Ross Avenue

Dallas, Texas 75201

(214) 220-7700

Approximate date of commencement of proposed sale to the public: From time to time after this Registration Statement becomes effective.

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, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  ☒    Accelerated filer  ☐    Non-accelerated filer  ☐    Smaller reporting company  ☐    Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

CALCULATION OF REGISTRATION FEE

Title of Each Class of Securities to be Registered(1)	Amount to be Registered / Proposed Maximum Offering Price per Security /Proposed Maximum Aggregate Offering Price(1)	Amount of Registration Fee(2)
Debt securities
Common stock, par value $.01 per share
Preferred stock, par value $.01 per share
Depositary shares(3)
Warrants
Stock purchase contracts
Stock purchase units

(1) There is being registered hereunder such unspecified number or amount of the securities of each identified class as may from time to time be issued by the registrant at unspecified prices and as may be issuable upon conversion, redemption, exchange, exercise or settlement of any securities registered hereunder, including under any applicable antidilution provisions. Any securities registered hereunder may be sold separately or as units with other securities registered hereunder.

(2) In accordance with Rules 456(b) and 457(r) under the Securities Act of 1933, the registrant is deferring payment of the registration fee required in connection with this registration statement.

(3) The depositary shares registered hereunder will be evidenced by depositary receipts issued pursuant to a depositary agreement. If the registrant elects to offer to the public fractional interests in shares of preferred stock, then the registrant will distribute depositary receipts to those persons purchasing the fractional interests and will issue the shares of preferred stock to the depositary under the depositary agreement.

PROSPECTUS

Pioneer Natural Resources Company

Debt Securities

Common Stock

Preferred Stock

Depositary Shares

Warrants

Stock Purchase Contracts

Stock Purchase Units

We may offer and sell the securities listed above from time to time in one or more classes or series and in amounts, at prices and on terms that we will determine at the time of the offering.

This prospectus describes some of the general terms that may apply to these securities and the general manner in which they may be offered. We will provide specific terms of the securities to be sold and the methods by which we will sell them in one or more supplements to this prospectus. The prospectus supplement may also add, update or change information contained in this prospectus. You should read this prospectus and any supplement carefully before you invest. This prospectus may not be used to offer or sell securities without a prospectus supplement describing the methods and terms of the offering. We may sell the securities directly or we may distribute them through underwriters or dealers. In addition, the underwriters may overallot a portion of the securities.

Our common stock is listed on the New York Stock Exchange under the symbol “PXD.”

Investing in these securities involves risks. We recommend that you read carefully the risks we describe in any accompanying prospectus supplement and the risks factors that are incorporated by reference into this prospectus from our filings made with the Securities and Exchange Commission. See “Risk Factors” on page 3 of this prospectus.

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 August 5, 2020.

TABLE OF CONTENTS

	Page
About This Prospectus		1
Uncertainty of Forward-Looking Statements		2
Risk Factors		3
Where You Can Find More Information		4
Information That We Incorporate by Reference		4
Pioneer		5
Use of Proceeds		6
Description of Debt Securities		7
Description of Capital Stock		19
Description of Depositary Shares		25
Description of Warrants		27
Description of Stock Purchase Contracts and Stock Purchase Units		29
Plan of Distribution		30
Legal Matters		32
Experts		32

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ABOUT THIS PROSPECTUS

This prospectus is part of a Registration Statement on Form S-3 that we filed with the Securities and Exchange Commission, or the SEC, using a shelf registration process. Under this shelf process, we may sell any combination of the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities we may offer. Each time we sell securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering. This prospectus does not contain all of the information included in the Registration Statement. For a more complete understanding of the offering of the securities, you should refer to the Registration Statement, including its exhibits. The prospectus supplement may also add, update or change information contained in this prospectus. You should read both this prospectus and any prospectus supplement together with the documents incorporated by reference into this prospectus as described below under the heading “Information That We Incorporate by Reference.”

You should rely only on the information contained or incorporated by reference in this prospectus and any prospectus supplement. We have not authorized anyone to provide you with different information. We are not making offers to sell the securities in any jurisdiction in which an offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to anyone to whom it is unlawful to make an offer or solicitation.

The information in this prospectus is accurate as of the date on the front cover. You should not assume that the information contained in this prospectus is accurate as of any other date.

In this prospectus, references to the terms “we,” “us” or “Pioneer” or other similar terms refer to Pioneer Natural Resources Company and not to our subsidiaries, unless we state otherwise or the context indicates otherwise.

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UNCERTAINTY OF FORWARD-LOOKING STATEMENTS

This prospectus and the documents we incorporate by reference contain statements that constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. The forward-looking statements speak only as of the date made, and we undertake no obligation to update such forward-looking statements. These forward-looking statements may be identified by the use of the words “believe,” “plan,” “expect,” “anticipate,” “forecast,” “intend,” “continue,” “may,” “will,” “could,” “should,” “contemplate,” “would,” “future,” “potential,” “estimate” and similar expressions that contemplate future events. These statements appear in a number of places in this prospectus and in documents we incorporate by reference. All statements other than statements of historical fact included or incorporated in this prospectus, including statements regarding our financial position, business strategy, production and reserve growth and other plans and objectives for our future operations, are forward-looking statements.

Although we believe that such forward-looking statements are based on reasonable assumptions, we give no assurance that our expectations will in fact occur. Important factors could cause actual results to differ materially from those in the forward-looking statements, including factors identified in our periodic and current reports incorporated in this prospectus by reference or as stated in a prospectus supplement to this prospectus under the caption “Risk Factors.” Forward-looking statements are subject to risks and uncertainties and include information concerning general economic and global conditions; possible or assumed future results of operations; estimates of oil and gas production; proved reserves and certain operating and financial results; drilling plans; future cash flows; anticipated capital expenditures; the level of future expenditures for environmental costs; and the strategies, plans and objectives of management.

All forward-looking statements attributable to us are expressly qualified in their entirety by this cautionary statement.

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RISK FACTORS

Investing in our securities involves risks. You should carefully consider the specific risks described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019, as may be amended or supplemented by our quarterly reports on Form 10-Q, which are incorporated herein by reference, and any other risk factors that may be described 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, before making an investment decision. See “Information That We Incorporate by Reference.”

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WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and other reports, proxy statements and other information with the Securities and Exchange Commission (the “SEC”). The SEC maintains an Internet site (www.sec.gov) that contains the reports, proxy statements and other information that we file electronically with the SEC. Our reports, proxy statements and other information are also available through our Internet site at www.pxd.com. The information contained in our website is not part of this prospectus.

Our common stock is listed on the New York Stock Exchange under the symbol “PXD.” Our reports and other information filed with the SEC can also be inspected at the offices of the New York Stock Exchange, 20 Broad Street, New York, New York 10005.

INFORMATION THAT WE INCORPORATE BY REFERENCE

The SEC allows us to incorporate by reference the information we file with the SEC, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus, and information we file later with the SEC will automatically update and supersede this information. Except to the extent that information therein is deemed furnished and not filed pursuant to securities laws and regulations, we incorporate by reference the documents listed below, which we have filed with the SEC under the Securities Exchange Act of 1934:

• the description of our common stock contained in our Registration Statement on Form 8-A filed with the SEC on August 5, 1997, as amended by our Registration Statement on Form 8-A/A filed on August 8, 1997, our Current Report on Form 8-K filed with the SEC on September 16, 2013, Exhibit 4.7 to our Annual Report on Form 10-K for the year ended December 31, 2019, and any other amendments or reports filed with the SEC for the purpose of updating such description;

• our Annual Report on Form 10-K for the year ended December 31, 2019;

• our Quarterly Reports on Form 10-Q for the periods ended March 31, 2020 and June 30, 2020; and

• our Current Reports on Form  8-K filed with the SEC on March  10, 2020, April  6, 2020, May  8, 2020, May  11, 2020, May  15, 2020, and May 27, 2020.

We also incorporate by reference each of the documents that we file with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 (excluding any information furnished under Items 2.02 or 7.01 in any Current Report on Form 8-K and any other information that is deemed furnished and not filed) after the date of this prospectus until the offering of the securities terminates or we have filed with the SEC an amendment to the Registration Statement relating to this offering that deregisters all securities then remaining unsold.

You may request a copy of any of these filings, other than an exhibit to those filings unless we have specifically incorporated that exhibit by reference into the filing, at no cost, by telephoning or writing us at the following address:

Pioneer Natural Resources Company

777 Hidden Ridge

Irving, Texas 75038

Attention: Investor Relations

Telephone: (972) 444-9001

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PIONEER

We are a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange. We are a large independent oil and gas exploration and production company that explores for, develops and produces oil, natural gas liquids and gas within the United States, with operations in the Permian Basin in West Texas.

Our executive offices are located at 777 Hidden Ridge, Irving, Texas 75038, telephone number: (972) 444-9001. We also maintain an office in Midland, Texas, and field offices in our areas of operation.

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USE OF PROCEEDS

Unless we inform you otherwise in the prospectus supplement, we expect to use the net proceeds from the sale of securities for general corporate purposes. These purposes may include, but are not limited to reduction or refinancing of debt or other corporate obligations, acquisitions, capital expenditures and working capital.

Pending any specific application, we may initially invest funds in short-term marketable securities or apply them to the reduction of short-term indebtedness.

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DESCRIPTION OF DEBT SECURITIES

This section describes the general terms and provisions of the debt securities that we may issue separately, upon exercise of a debt warrant, in connection with a stock purchase contract, or as part of a stock purchase unit from time to time in the form of one or more series of debt securities. The applicable prospectus supplement will describe the specific terms of the debt securities offered through that prospectus supplement as well as any general terms described in this section that will not apply to those debt securities.

Our debt securities will be issued under the indenture, dated June 26, 2012, between us and Wells Fargo Bank, National Association, as trustee, as supplemented from time to time (the “indenture”). Under the indenture, our debt securities may be subordinated to our other indebtedness. See “Description of Debt Securities—Subordination of Subordinated Debt Securities” below. We have filed the indenture as an exhibit to the Registration Statement of which this prospectus is a part. You can obtain a copy of the indenture and any indenture supplements by following the directions outlined in “Where You Can Find More Information.” We urge you to read the indenture and any supplement thereto because they, and not this description, define your rights as a debt securities holder.

The indenture does not limit the amount of debt securities that we may issue and permits us to issue securities from time to time in one or more series. The debt securities will be our unsecured obligations, unless otherwise stated in the applicable prospectus supplement. We currently conduct substantially all of our operations through subsidiaries, and the holders of debt securities (whether senior or subordinated debt securities) will be effectively subordinated to the creditors of our subsidiaries. This means that creditors of our subsidiaries will have a claim to the assets of our subsidiaries that is superior to the claim of our creditors, including holders of our debt securities.

The applicable prospectus supplement will describe the following terms of any series of debt securities that we may offer:

• the title of the debt securities;

• whether they are senior debt securities or subordinated debt securities;

• the total amount of the debt securities authorized and the amount outstanding, if any;

• any limit on the aggregate principal amount of the debt securities offered through that prospectus supplement;

• the identity of the person to whom we will pay interest if such person is anybody other than the holder;

• when the principal of the debt securities will mature;

• the interest rate or the method for determining it, including any procedures to vary or reset the interest rate;

• when interest will be payable, as well as the record dates for determining to whom we will pay interest;

• where the principal of, premium, if any, and interest on the debt securities will be paid;

• whether we have any obligation to redeem, repurchase or repay the debt securities under any mandatory or optional sinking funds or similar arrangements and the terms of those arrangements;

• when the debt securities may be redeemed if they are redeemable, as well as the redemption prices, and a description of the terms of redemption;

• whether we have any obligation to redeem or repurchase the debt securities at the holder’s option;

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• the denominations of the debt securities, if other than $1,000 or an integral multiple of $1,000;

• the amount that we will pay the holder if the maturity of the debt securities is accelerated, if other than their principal amount;

• the currency in which we will make payments to the holder and, if a foreign currency, the manner of conversion from United States dollars;

• any index we may use to determine the amount of payment of principal of, premium, if any, and interest on the debt securities;

• whether the debt securities will be issued in electronic, global or certificated form;

• if the debt securities will be issued only in the form of a global note, the name of the depositary or its nominee and the circumstances under which the global note may be exchanged in whole or in part for other individual debt securities in definitive registered form;

• the applicability of the legal defeasance and covenant defeasance provisions in the applicable indenture;

• any additions or changes to events of default and any additional events of default that would result in acceleration of their maturity;

• whether the debt securities will be issued as registered securities or bearer securities and, if the debt securities are bearer securities, whether coupons will be attached, whether and to whom any additional interest payments shall be made, and the circumstances, if any, under which the bearer debt securities may be exchanged for registered debt securities;

• the applicability or inapplicability of any covenants and any additions or changes to the covenants, including those relating to permitted consolidations, mergers or sales of assets or otherwise;

• if any debt securities do not bear interest, the dates for any required reports to the trustee;

• the amount that will be deemed to be the principal amount of the debt securities as of a particular date before maturity if the principal amount payable at the stated maturity date will not be able to be determined on that date;

• whether the debt securities will be convertible into or exchangeable for any other securities and the terms and conditions upon which a conversion or exchange may occur, including the initial conversion or exchange price or rate, the conversion or exchange period and any additional provisions;

• the terms of any repurchase or remarketing rights of third parties; and

• any other material terms of the debt securities.

Generally, we will pay the principal of, premium, if any, and interest on our registered debt securities either at an office or agency that we maintain for that purpose or, if we elect, we may pay interest by mailing a check to the holder’s address as it appears on our register (or, at the election of the holder, by wire transfer to an account designated by the holder). Except as may be provided otherwise in the applicable prospectus supplement, no payment on a bearer security will be made by mail to an address in the United States or by wire transfer to an account in the United States. Except as may be provided otherwise in the applicable prospectus supplement, we will issue our debt securities only in fully registered form without coupons, generally in denominations of $1,000 or integral multiples of $1,000. We will not apply a service charge for a transfer or exchange of our debt securities, but we may require that the holder pay the amount of any applicable tax or other governmental charge.

Debt securities may bear interest at fixed or floating rates. We may issue our debt securities at an original issue discount, bearing no interest or bearing interest at a rate that, at the time of issuance, is below market rate, to be sold at a substantial discount below their stated principal amount. Generally speaking, if our debt securities are issued at an original issue discount and there is an event of default or acceleration of their maturity, holders

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will receive an amount less than their principal amount. Tax and other special considerations applicable to any series of debt securities, including original issue discount debt, will be described in the prospectus supplement in which we offer those debt securities.

We will have the ability under the indenture to reopen a previously issued series of debt securities and issue additional debt securities of that series or establish additional terms of the series. We are also permitted to issue debt securities with the same terms as previously issued debt securities.

We will comply with Section 14(e) under the Securities Exchange Act of 1934 and any other tender offer rules under the Securities Exchange Act of 1934 that may then apply to any obligation we may have to purchase debt securities at the option of the holders. Any such obligation applicable to a series of debt securities will be described in the related prospectus supplement.

Subordination of Subordinated Debt Securities

Debt securities of a series may be subordinated to senior indebtedness to the extent set forth in the prospectus supplement relating to the subordinated debt securities. The definition of “senior indebtedness” (1) will include, among other things, our indebtedness, whether outstanding on the original issue date of the debt securities or incurred after such date, unless the instrument that creates or evidences such indebtedness provides that such obligations are subordinate in right of payment to the debt securities, and (2) will be specifically set forth in the prospectus supplement relating to the subordinated debt securities.

Subordinated debt securities of a particular series and any coupons relating to those debt securities will be subordinate in right of payment, to the extent and in the manner set forth in the indenture and the prospectus supplement relating to those subordinated debt securities, to the prior payment of all of our indebtedness that is designated as senior indebtedness with respect to that series.

Upon any payment or distribution of our assets to creditors or upon a total or partial liquidation or dissolution of us or in a bankruptcy, receivership or similar proceeding relating to us or our property, holders of senior indebtedness will be entitled to receive payment in full in cash of the senior indebtedness before holders of subordinated debt securities will be entitled to receive any payment of principal, premium, if any, or interest with respect to the subordinated debt securities and, until the senior indebtedness is paid in full, any distribution to which holders of subordinated debt securities would otherwise be entitled will be made to the holders of senior indebtedness (except that holders of subordinated debt securities may receive shares of stock and any debt securities that are subordinated to senior indebtedness to at least the same extent as the subordinated debt securities), all as described in the applicable prospectus supplement.

Unless otherwise provided in an applicable prospectus supplement, we may not (1) make any payments of principal, premium, if any, or interest with respect to subordinated debt securities, (2) make any deposit for the purpose of defeasance of the subordinated debt securities, or (3) repurchase, redeem or otherwise retire (except, in the case of subordinated debt securities that provide for a mandatory sinking fund, by our delivery of subordinated debt securities to the trustee in satisfaction of our sinking fund obligation) any subordinated debt securities if:

• any principal, premium or interest with respect to senior indebtedness is not paid within any applicable grace period (including at maturity); or

• any other default on senior indebtedness occurs and the maturity of that senior indebtedness is accelerated in accordance with its terms,

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unless, in either case, the default has been cured or waived and the acceleration has been rescinded, the senior indebtedness has been paid in full in cash, or Pioneer and the trustee receive written notice approving the payment from the representatives of each issue of specified senior indebtedness as described in the applicable prospectus supplement.

Unless otherwise provided in an applicable prospectus supplement, during the continuance of any default (other than a default described in the preceding paragraph) with respect to any senior indebtedness pursuant to which the maturity of that senior indebtedness may be accelerated immediately without further notice (except such notice as may be required to effect the acceleration) or the expiration of any applicable grace periods, we may not pay the subordinated debt securities for such periods after notice of the default from the representative of specified senior indebtedness as shall be specified in the applicable prospectus supplement.

By reason of this subordination, in the event of insolvency, our creditors who are holders of senior indebtedness or holders of any indebtedness or preferred stock of our subsidiaries, as well as certain of our general creditors, may recover more, ratably, than the holders of the subordinated debt securities.

Events of Default

Except as may be provided otherwise in a prospectus supplement, any of the following events will constitute an event of default for a series of debt securities under the indenture:

• failure to pay interest on our debt securities of that series, or any payment with respect to the related coupons, if any, for 30 days past the applicable due date;

• failure to pay principal of, or premium, if any, on our debt securities of that series when due, whether at maturity, upon redemption, by declaration, upon required repurchase or otherwise;

• failure to make any sinking fund payment on debt securities of that series when due;

• failure to perform any covenant or agreement in the indenture, including failure to comply with the provisions of the indenture relating to consolidations, mergers and sales of assets, but other than a covenant included in the indenture solely for the benefit of a different series of our debt securities, which failure to comply continues for 90 days after written notice from the trustee or holders of 25% of the outstanding principal amount of the debt securities of that series as provided in the applicable indenture;

• acceleration of more than $50,000,000 of our indebtedness under the terms of the applicable debt instrument if the acceleration is not rescinded or the indebtedness is not paid within ten days after written notice from the trustee or holders of 25% of the outstanding principal amount of the debt securities of that series as provided in the indenture;

• specified events relating to our bankruptcy, insolvency or reorganization or any of our significant subsidiaries; and

• any other event of default provided with respect to debt securities of that series.

An event of default with respect to one series of debt securities is not necessarily an event of default for another series. The trustee may withhold notice to the holders of debt securities of any default (except in the payment of principal, premium, if any, or interest) if it considers such withholding of notice to be in the interests of the holders.

If an event of default described in the sixth bullet point above occurs, the entire principal of, premium, if any, and accrued interest on, all debt securities then outstanding will be due and payable immediately, without any declaration or other act on the part of the trustee or any holders. If any other event of default for any series of debt securities occurs and continues for the requisite amount of time, the trustee or the holders of at least 25% in

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aggregate principal amount of the debt securities of the series may declare the entire principal of, and accrued interest on, all the debt securities of that series to be due and payable immediately. If this happens, subject to certain conditions, the holders of a majority in aggregate principal amount of the debt securities of that series can rescind the declaration. Other than its duties in case of a default, a trustee is not obligated to exercise any of its rights or powers under the indenture at the request, order or direction of any holders, unless the holders offer the trustee reasonable security or indemnity. If they provide this reasonable security or indemnification, the holders of a majority in aggregate principal amount of any series of debt securities may direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any power conferred upon the trustee, for that series of debt securities.

Before the acceleration of the maturity of the debt securities of any series, the holders of a majority in aggregate principal amount of the debt securities of that series may, on behalf of the holders of all debt securities and any related coupons of that series, waive any past default or event of default and its consequences for that series, except (1) a default in the payment of the principal, premium or interest with respect to those debt securities or (2) a default with respect to a provision of the indenture that cannot be amended without the consent of each holder affected by the amendment. In case of a waiver of a default, that default shall cease to exist, any event of default arising from that default shall be deemed to have been cured for all purposes, and Pioneer, the trustee and the holders of the senior debt securities of that series will be restored to their former positions and rights under the indenture.

A default in the payment of any of our debt securities, or a default with respect to our debt securities that causes them to be accelerated, may give rise to a cross-default under our bank credit facility or other indebtedness.

Satisfaction and Discharge of the Indenture

The indenture will generally cease to be of any further effect with respect to a series of debt securities if:

• we have delivered to the trustee for cancellation all debt securities of that series (with certain limited exceptions); or

• all debt securities and coupons of that series not previously delivered to the trustee for cancellation have become due and payable, whether by redemption, at stated maturity or otherwise, and we have deposited with the trustee as trust funds the entire amount sufficient to pay at maturity or upon redemption all of those debt securities and coupons;

and if, in either case, we also pay or cause to be paid all other sums payable under the indenture by us.

Legal Defeasance and Covenant Defeasance

Any series of our debt securities may be subject to the defeasance and discharge provisions of the indenture if so specified in the applicable prospectus supplement. If those provisions are applicable, we may elect either:

• legal defeasance — which will permit us to defease and be discharged from, subject to limitations, all of our obligations with respect to those debt securities; or

• covenant defeasance — which will permit us to be released from our obligations to comply with covenants relating to those debt securities as described in the applicable prospectus supplement, which may include obligations concerning subordination of our subordinated debt securities.

If we exercise our legal defeasance option with respect to a series of debt securities, payment of those debt securities may not be accelerated because of an event of default. If we exercise our covenant defeasance option with respect to a series of debt securities, payment of those debt securities may not be accelerated because of an event of default related to the specified covenants.

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Unless otherwise provided in the applicable prospectus supplement, we may invoke legal defeasance or covenant defeasance with respect to any series of our debt securities only if:

• We irrevocably deposit with the trustee, in trust, an amount in funds or U.S. government obligations that, through the payment of principal and interest in accordance with their terms, will provide money in an amount sufficient to pay, when due upon maturity or redemption, as the case may be, the principal of, premium, if any, and interest on those debt securities;

• We deliver to the trustee a certificate from a nationally recognized firm of independent accountants expressing their opinion that the payments of principal and interest when due and without reinvestment on the deposited U.S. government obligations plus any deposited money without investment will provide cash at such times and in such amounts as will be sufficient to pay the principal, premium, if any, and interest when due with respect to all the debt securities of that series to maturity or redemption, as the case may be;

• 91 days pass after the deposit is made and, during the 91-day period, no default relating to our bankruptcy, insolvency or reorganization occurs that is continuing at the end of that period;

• no event of default has occurred and is continuing on the date of the deposit and after giving effect to the deposit;

• the deposit is not a default under any other material agreement binding on us and, in the case of subordinated debt securities, is not prohibited by the subordination provisions of the indenture;

• We deliver to the trustee an opinion of counsel to the effect that the trust resulting from the deposit is not, or is qualified as, a regulated investment company under the Investment Company Act of 1940;

• We deliver to the trustee an opinion of counsel addressing certain U.S. federal income tax matters relating to the defeasance; and

• We deliver to the trustee an officers’ certificate and an opinion of counsel, each stating that all conditions precedent to the defeasance of the debt securities of that series as contemplated by the applicable indenture have been complied with.

Modification and Waiver

We may enter into supplemental indentures for the purpose of modifying or amending the indenture with the consent of holders of at least a majority in aggregate principal amount of each series of our outstanding debt securities affected. However, unless otherwise provided in the applicable prospectus supplement, the consent of all of the holders of our debt securities that are affected by any modification or amendment is required to do any of the following:

• for debt securities of any series, reduce the required percentage in principal amount of that series that must consent to an amendment or waiver;

• reduce the rate of, or extend the time for, payment of interest on any debt security or coupon or reduce the amount of any interest payment to be made with respect to any debt security or coupon;

• reduce the principal of, or extend the stated maturity of principal of, any debt security;

• reduce any premium payable upon the redemption of any debt security or change the time at which any debt security may or shall be redeemed;

• make any debt security payable in a currency other than that stated in that debt security;

• modify the subordination provisions of any subordinated debt security in a manner adverse to holders;

• release any security that may have been granted with respect to any debt security;

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• impair the right of any holder to receive payment of principal of, premium, if any, or interest on any debt security on and after the due date therefor;

• make any change in the provisions of the indenture relating to waivers of defaults or amendments that require unanimous consent;

• change any obligations provided for in the indenture to pay any additional interest with respect to bearer securities; and

• limit our obligations to maintain a paying agency outside the United States for payment on bearer securities or limit our obligation to redeem certain bearer securities.

In addition, with respect to the indenture, Pioneer and the trustee may enter into supplemental indentures without the consent of the holders of debt securities for one or more of the following purposes (in addition to any other purposes specified in an applicable prospectus supplement):

• to evidence that another person has become our successor under the provisions of the indenture relating to consolidations, mergers and sales of assets and that the successor assumes our covenants, agreements and obligations in the indenture and in the debt securities;

• to surrender any of our rights or powers under the indenture, to limit the applicability of, or consequences of breach of, any covenant under the indenture, to add to our covenants further covenants, restrictions, conditions or provisions for the protection of the holders of all or any series of debt securities issued under the indenture, and to make a default in any of these additional covenants, restrictions, conditions or provisions a default or an event of default under the indenture;

• to cure any ambiguity or omission or to make corrections or supplements to the indenture, any supplemental indenture or any debt securities issued under the indenture, or to convey, transfer, assign, mortgage or pledge any property to or with the trustee;

• to modify or amend the indenture to permit the qualification of the indenture or any supplemental indenture under the Trust Indenture Act of 1939 as then in effect;

• to add to or change any of the provisions of the indenture to provide that bearer securities may be registrable as to principal, to change or eliminate any restrictions on the payment of principal or premium with respect to registered securities or of principal, premium or interest with respect to bearer securities, or to permit registered securities to be exchanged for bearer securities, so long as none of these actions adversely affects the interests of the holders of debt securities or any coupons of any series in any material respect or permits the issuance of debt securities of any series in uncertificated form;

• to comply with the provisions of the indenture relating to consolidations, mergers and sales of assets;

• to modify the subordination provisions of any subordinated debt securities in a manner that would limit or terminate the benefits available to any holder of senior indebtedness (or its representative) under such subordination provisions;

• to add guarantees with respect to any or all of the debt securities or to secure any or all of the debt securities;

• to make any change that does not adversely affect the rights of any holder of a series of debt securities under the indenture;

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• to add to, change or eliminate any of the provisions of the indenture with respect to one or more series of debt securities, so long as the addition, change or elimination not otherwise permitted under the indenture will (1) neither apply to any debt security of any series created before the execution of the supplemental indenture and entitled to the benefit of that provision nor modify the rights of the holders of that debt security with respect to that provision or (2) become effective only when there is none of that debt security outstanding;

• to evidence and provide for the acceptance of appointment by a successor or separate trustee with respect to the debt securities of one or more series and to add to or change any of the provisions of the indenture as necessary to provide for or facilitate the administration of the indenture by more than one trustee;

• to establish the form or terms of debt securities and coupons, if any, of any series; and

• to provide for uncertificated debt securities in addition to or in place of certificated debt securities, subject to certain limitations.

Consolidation, Merger and Sale of Assets

Unless otherwise provided in the applicable prospectus supplement, the indenture prohibits us from consolidating with or merging into another business entity, or transferring or leasing substantially all of our assets, unless:

• we are the continuing entity in the case of a merger; or the surviving or acquiring entity, if other than us, is organized and validly existing under the laws of the United States of America, any state thereof, or the District of Columbia and it expressly assumes our obligations with respect to our debt securities by executing a supplemental indenture;

• immediately after giving effect to the transaction, no default or event of default would occur or be continuing;

• the successor company waives any right to redeem any bearer security under circumstances in which the successor company would be entitled to redeem the bearer security but we would have not been entitled to redeem that bearer security if the consolidation, merger or sale had not occurred; and

• we have delivered to the trustee an officers’ certificate and an opinion of counsel, each stating that the consolidation, merger or sale complies with the indenture.

The surviving or acquiring company will be substituted for us in the indenture with the same effect as if it had been an original party to the indenture, and we will be relieved from any further obligations under the indenture.

No Protection in the Event of a Change of Control

Unless otherwise set forth in the prospectus supplement, the debt securities will not contain any provisions that protect the holders of the debt securities in the event of a change of control of us or in the event of a highly leveraged transaction, whether or not such transaction results in a change of control of us.

Conversion or Exchange Rights

If debt securities of any series are convertible or exchangeable, the applicable prospectus supplement will specify:

• the type of securities into which they may be converted or exchanged;

• the conversion price or exchange ratio, or its method of calculation;

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• whether conversion or exchange is mandatory or at the holder’s election;

• how and when the conversion price or exchange ratio may be adjusted; and

• any other important terms concerning the conversion or exchange rights.

Global Securities

Our debt securities may be issued in the form of one or more global securities that will be deposited with a depositary or its nominee identified in the applicable prospectus supplement. If so, each global security will be issued in the denomination of the aggregate principal amount of securities that it represents. Unless and until it is exchanged in whole or in part for debt securities that are in definitive registered form, a global security may not be transferred or exchanged except as a whole to the depositary, another nominee of the depositary or a successor of the depositary or its nominee. The applicable prospectus supplement will describe this concept more fully.

The specific material terms of the depositary arrangement with respect to any portion of a series of our debt securities that will be represented by a global security will be described in the applicable prospectus supplement. We anticipate that the following provisions will apply to our depositary arrangements.

Upon the issuance of any global security, and its deposit with or on behalf of the depositary, the depositary will credit, on its book-entry registration and transfer system, the principal amounts of our debt securities represented by the global security to the accounts of participating institutions that have accounts with the depositary or its nominee. The underwriters or agents engaging in the distribution of our debt securities or us, if we are offering and selling our debt securities directly, will designate the accounts to be credited. Ownership of beneficial interests in a global security will be limited to participating institutions or their clients. The depositary or its nominee will keep records of the ownership and transfer of beneficial interests in a global security by participating institutions. Participating institutions will keep records of the ownership and transfer of beneficial interests by their clients. The laws of some jurisdictions may require that purchasers of our securities receive physical certificates, which may impair a holder’s ability to transfer its beneficial interests in global securities.

While the depositary or its nominee is the registered owner of a global security, the depositary or its nominee will be considered the sole owner of all of our debt securities represented by the global security for all purposes under the indenture. Generally, if a holder owns beneficial interests in a global security, that holder will not be entitled to have our debt securities registered in that holder’s own name, and that holder will not be entitled to receive a certificate representing that holder’s ownership. Accordingly, if a holder owns a beneficial interest in a global security, the holder must rely on the depositary and, if applicable, the participating institution of which that holder is a client to exercise the rights of that holder under the applicable indenture.

The depositary may grant proxies and otherwise authorize participating institutions to take any action that a holder is entitled to take under the indenture. We understand that, according to existing industry practices, if we request any action of holders, or any owner of a beneficial interest in a global security wishes to give any notice or take any action, the depositary would authorize the participating institutions to give the notice or take the action, and the participating institutions would in turn authorize their clients to give the notice or take the action.

Generally, we will make payments on our debt securities represented by a global security directly to the depositary or its nominee. It is our understanding that the depositary will then credit the accounts of participating institutions, which will then distribute funds to their clients. We also expect that payments by participating institutions to their clients will be governed by standing instructions and customary practices, as is now the case with securities held for the accounts of clients registered in “street names,” and will be the responsibility of the participating institutions. Neither we nor the trustee, nor their respective agents, will have any responsibility, or bear any liability, for any aspects of the records relating to or payments made on account of beneficial interests in a global security, or for maintaining, supervising or reviewing records relating to beneficial interests.

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Generally, a global security may be exchanged for certificated debt securities only in the following instances:

• the depositary notifies us that it is unwilling or unable to continue as depositary, or it ceases to be a registered clearing agency, if required to be registered by law, and a successor is not appointed within 90 days; or

• we determine in our sole discretion that we will no longer have debt securities represented by global securities or that it will permit global securities to be exchanged for certificated debt securities.

Unless otherwise specified in the applicable prospectus supplement, The Depository Trust Company, which we refer to as “DTC,” will act as depositary for securities issued in the form of global securities. Except as set forth below, the global securities may be transferred, in whole and not in part, only to DTC or another nominee of DTC. Investors may hold their beneficial interests in the global securities directly through DTC if they have an account with DTC or indirectly through organizations that have accounts with DTC.

The descriptions of the operations and procedures of DTC set forth below are provided solely as a matter of convenience. These operations and procedures are solely within the control of DTC and are subject to change by it from time to time. We do not take any responsibility for these operations or procedures, and investors are urged to contact DTC or its participants directly to discuss these matters.

DTC has advised us that it is:

• a limited purpose trust company organized under the laws of the State of New York;

• a “banking organization” within the meaning of the New York Banking Law;

• a member of the Federal Reserve System;

• a “clearing corporation” within the meaning of the New York Uniform Commercial Code, as amended; and

• a “clearing agency” registered under Section 17A of the Securities Exchange Act of 1934.

DTC was created to hold securities for its participants and facilitates the clearance and settlement of securities transactions between its participants through electronic book-entry changes to the accounts of its participants, which eliminates the need for physical transfer and delivery of certificates. DTC’s participants include securities brokers and dealers; banks and trust companies; clearing corporations and some other organizations. Indirect access to DTC’s system is also available to other entities such as banks, brokers, dealers and trust companies; these indirect participants clear through or maintain a custodial relationship with a participant in DTC, either directly or indirectly. Investors who are not DTC participants may beneficially own securities held by or on behalf of DTC only through participants or indirect participants in DTC.

We expect that pursuant to procedures established by DTC:

• upon deposit of each global security, DTC will credit the accounts of participants in DTC designated by the underwriters with an interest in the global security; and

• ownership of the securities will be shown on, and the transfer of ownership of the securities will be effected only through, records maintained by DTC, with respect to the interests of participants in DTC, and the records of participants and indirect participants, with respect to the interests of persons other than participants in DTC.

The laws of some jurisdictions may require that some purchasers of securities take physical delivery of the securities in definitive form. Accordingly, the ability to transfer interests in the securities represented by a global security to these persons may be limited. In addition, because DTC can act only on behalf of its participants, who in turn act on behalf of persons who hold interests through participants, the ability of a person having an interest

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in securities represented by a global security to pledge or transfer that interest to persons or entities that do not participate in DTC’s system, or to otherwise take actions in respect of that interest, may be affected by the lack of a physical definitive security in respect of the interest.

So long as DTC or its nominee is the registered owner of a global security, DTC or the nominee, as the case may be, will be considered the sole owner or holder of the securities represented by the global security for all purposes under the indenture. Except as provided below, owners of beneficial interests in a global security:

• will not be entitled to have securities represented by the global security registered in their names;

• will not receive or be entitled to receive physical delivery of certificated securities; and

• will not be considered the owners or holders of the securities under the indenture for any purpose, including with respect to the giving of any direction, instruction, or approval to the trustee under the indenture.

Accordingly, each holder owning a beneficial interest in a global security must rely on the procedures of DTC and, if the holder is not a participant or an indirect participant in DTC, on the procedures of the DTC participant through which the holder owns its interest, to exercise any rights of a holder of securities under the indenture or the global security. We understand that under existing industry practice, if we request any action of holders of securities, or if a holder that is an owner of a beneficial interest in a global security desires to take any action that DTC, as the holder of the global security, is entitled to take, then DTC would authorize its participants to take the action and the participants would authorize holders owning through participants to take the action or would otherwise act upon the instruction of such holders. Neither the trustee nor Pioneer will have any responsibility or liability for any aspect of the records relating to or payments made on account of securities by DTC, or for maintaining, supervising, or reviewing any records of DTC relating to the securities.

Payments with respect to the principal of, and premium, if any, and interest on, any securities represented by a global security registered in the name of DTC or its nominee on the applicable record date will be payable by the trustee to or at the direction of DTC or its nominee in its capacity as the registered holder of the global security representing those securities under the indenture. Under the terms of the indenture, Pioneer and the trustee may treat the persons in whose names the securities, including the global securities, are registered as the owners of the securities for the purpose of receiving payment on the securities and for any and all other purposes whatsoever. Accordingly, neither Pioneer nor the trustee has or will have any responsibility or liability for the payment of amounts to owners of beneficial interests in a global security, including principal, premium, if any, and interest. Payments by the participants and the indirect participants in DTC to the owners of beneficial interests in a global security will be governed by standing instructions and customary industry practice and will be the responsibility of the participants or the indirect participants and DTC.

Transfers between participants in DTC will be effected in accordance with DTC’s procedures and will be settled in same-day funds.

Although DTC has agreed to the above procedures to facilitate transfers of interests in the global securities among participants in DTC, DTC is under no obligation to perform or to continue to perform the procedures, and the procedures may be discontinued at any time.

The information in this section concerning DTC and DTC’s book-entry system has been obtained from sources that we believe to be accurate, but we assume no responsibility for its accuracy. Neither the trustee nor Pioneer will have any responsibility for the performance by DTC or its participants of their obligations as described in this prospectus or under the rules and procedures governing their operations.

Debt securities may be issued as registered securities (which will be registered as to principal and interest in the register maintained by the registrar for those senior debt securities) or bearer securities (which will be transferable only by delivery). If debt securities are issuable as bearer securities, certain special limitations and considerations will apply, as set forth in the applicable prospectus supplement.

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Reports

We will deliver to the trustee (unless such reports have been made available on the SEC’s Electronic Data Gathering, Analysis and Retrieval system), within 30 calendar days after we have filed with the SEC, copies of our annual reports and of the information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may by rules and regulations prescribe) that we are required to file with the SEC pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934. We will also comply with the provisions of Section 314(a) of the Trust Indenture Act of 1939.

Pioneer’s Trustee

We have designated Wells Fargo Bank, National Association, to serve as trustee under the indenture. Wells Fargo Bank, National Association, is also the trustee for certain of our other series of existing debt securities. We may engage additional or substitute trustees with respect to any particular series of debt securities. We may maintain banking and other commercial relationships with any trustee, including Wells Fargo, National Association and its affiliates, in the ordinary course of business. A trustee may own our debt securities.

Governing Law

The indenture and the debt securities are governed by the laws of the State of New York.

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DESCRIPTION OF CAPITAL STOCK

General

We are incorporated in the State of Delaware. The rights of our capital stock are generally covered by Delaware law and our certificate of incorporation and bylaws (each as amended and restated and in effect on the date hereof). The terms of our capital stock are therefore subject to Delaware law, including the Delaware General Corporation Law (the “DGCL”), and the common and constitutional law of Delaware.

The following sections describe the general terms of our capital stock, including preferred stock that may be issued without the vote of our common stock. This is a summary and does not purport to be complete. References to our certificate of incorporation and bylaws mean our certificate of incorporation and bylaws as each has been amended and restated from time to time. our certificate of incorporation and bylaws (each as amended and restated and in effect on the date hereof) are incorporated by reference or filed as exhibits hereto, and amendments or restatements of each will be filed with the SEC in future periodic or current reports in accordance with SEC rules.

Authorized Capital Stock

Our authorized capital stock consists of 600,000,000 shares of stock, including:

• 500,000,000 shares of common stock, $0.01 par value per share; and

• 100,000,000 shares of preferred stock, $0.01 par value per share, including 500,000 shares that are designated (but not issued) as Series A Junior Participating Preferred Stock.

Common Stock

This section describes the general terms of our common stock. For more detailed information about the rights of our common stock, you should refer to our certificate of incorporation and bylaws and the applicable provisions of Delaware law, including the DGCL.

Holders of our common stock are entitled to one vote per share with respect to each matter submitted to a vote of our stockholders, subject to voting rights that may be established for shares of our preferred stock, if any. Except as may be provided in connection with our preferred stock or as otherwise may be required by law or our certificate of incorporation, our common stock is the only capital stock entitled to vote in the election of directors. Our common stock does not have cumulative voting rights.

Subject to the rights of holders of our preferred stock, if any, holders of our common stock are entitled to receive dividends lawfully declared by our board of directors (the “Pioneer Board”). If we liquidate, dissolve or wind up our business, whether voluntarily or involuntarily, holders of our common stock will be entitled to receive any assets available for distribution to our stockholders after we have paid or set apart for payment the amounts necessary to satisfy any preferential or participating rights to which the holders of each outstanding series of preferred stock are entitled by the express terms of such series of preferred stock.

The outstanding shares of our common stock are fully paid and nonassessable. Our common stock does not have any preemptive, subscription or conversion rights. We may issue additional shares of our authorized common stock as authorized by the Pioneer Board from time to time, without stockholder approval, except as may be required by applicable stock exchange requirements.

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Preferred Stock

This section describes the general terms and provisions of our preferred stock. The applicable prospectus supplement will describe the specific terms of the shares of preferred stock offered through that prospectus supplement, as well as any general terms described in this section that will not apply to those shares of preferred stock. If we designate or issue a new series of preferred stock, we will file a copy of the certificate of designations that contains the terms of that series with the SEC. Each certificate of designations will establish the number of shares included in a designated series and fix the designation, powers, privileges, preferences and rights of the shares of each series as well as any applicable qualifications, limitations or restrictions. You should refer to the applicable certificate of designations as well as our certificate of incorporation before deciding to buy shares of our preferred stock as described in the applicable prospectus supplement.

The Pioneer Board has been authorized to provide for the issuance of shares of our preferred stock in multiple series without the approval of common stockholders. With respect to each series of our preferred stock, the Pioneer Board has the authority to fix the terms of such series, including, without limitation, the following:

• the designation of the series;

• the number of shares within the series;

• whether dividends are cumulative and, if cumulative, the dates from which dividends are cumulative;

• the rate of any dividends, any conditions upon which dividends are payable, and the dates of payment of dividends;

• whether the shares are redeemable, the redemption price and the terms of redemption;

• the amount payable to a holder of such shares for each share owned if we dissolve or liquidate;

• whether the shares are convertible or exchangeable, the price or rate of conversion or exchange, and the applicable terms and conditions;

• any restrictions on issuance of shares in the same series or any other series;

• voting rights applicable to the series of preferred stock; and

• any other rights, preferences or limitations of such series.

A preferred stockholder’s rights with respect to such holder’s shares of preferred stock will be subordinate to the rights of our general creditors. Shares of our preferred stock that we issue will be fully paid and nonassessable and will not be entitled to preemptive rights unless specified in the applicable certificate of designations and prospectus supplement.

Our ability to issue preferred stock, or rights to purchase such shares, could discourage an unsolicited acquisition proposal. For example, we could impede a business combination by issuing a series of preferred stock containing class voting rights that would enable the holders of such preferred stock to block a business combination transaction. Alternatively, we could facilitate a business combination transaction by issuing a series of preferred stock having sufficient voting rights to provide a required percentage vote of the stockholders. Additionally, under certain circumstances, our issuance of preferred stock could adversely affect the voting power of the holders of our common stock. Although the Pioneer Board is required to make any determination to issue any preferred stock based on its judgment as to the best interests of us and our common stockholders, the Pioneer Board could act in a manner that would discourage an acquisition attempt or other transaction that some, or a majority, of our stockholders might believe to be in their best interests or in which stockholders might receive a premium for their stock over prevailing market prices of such stock. The Pioneer Board does not at present intend to seek stockholder approval prior to any issuance of currently authorized stock, unless otherwise required by law or applicable stock exchange requirements.

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Limitation on Directors’ Liability

Our certificate of incorporation provides, as authorized by Section 102(b)(7) of the DGCL, that a director of Pioneer will not be personally liable to us or our stockholders for monetary damages for breach of fiduciary duty as a director, except for liability:

• for any breach of the director’s duty of loyalty to us or our stockholders;

• for acts or omission not in good faith or that involve intentional misconduct or a knowing violation of law;

• for unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the DGCL; or

• for any transaction from which the director derived an improper personal benefit.

The inclusion of this provision in our certificate of incorporation may have the effect of reducing the likelihood of derivative litigation against directors and may discourage or deter stockholders or management from bringing a lawsuit against directors for breach of their duty of care, even though such an action, if successful, might otherwise have benefited us and our stockholders.

Section 203 of the Delaware General Corporation Law

Section 203 of the DGCL prohibits a defined set of transactions between a Delaware corporation, such as Pioneer, and an “interested stockholder.” An interested stockholder is defined as a person who, together with any affiliates or associates of such person, beneficially owns, directly or indirectly, 15% or more of the outstanding voting shares of a Delaware corporation. This provision may prohibit business combinations between an interested stockholder and a corporation for a period of three years after the date the interested stockholder becomes an interested stockholder. The term “business combination” is broadly defined to include a broad array of transactions, including mergers, consolidations, sales or other dispositions of assets having a total value in excess of 10% of the consolidated assets of the corporation or all of the outstanding stock of the corporation, and some other transactions that would increase the interested stockholder’s proportionate share ownership in the corporation.

This prohibition is effective unless:

• the business combination or the transaction that resulted in the stockholder becoming an interested stockholder is approved by the corporation’s board of directors prior to the time the interested stockholder becomes an interested stockholder;

• the interested stockholder acquired at least 85% of the voting stock of the corporation, other than stock held by directors who are also officers or by qualified employee stock plans, in the transaction in which it becomes an interested stockholder; or

• the business combination is approved by a majority of the corporation’s board of directors and by the affirmative vote of 66 ²/₃% of the outstanding voting stock that is not owned by the interested stockholder.

Certain Certificate of Incorporation and Bylaws Provisions

Advance Notice for Stockholder Proposals and Director Nominations

Our certificate of incorporation and bylaws contain provisions requiring that advance notice be delivered to us of any business to be brought by a stockholder before an annual meeting of stockholders and providing for certain procedures to be followed by stockholders in nominating persons for election to the Pioneer Board. Generally, the advance notice provisions provide that the stockholder must give written notice to our Secretary

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not less than 60 days before the scheduled date of the annual meeting of our stockholders or, if later, ten days after the first public notice of the annual meeting is sent to our stockholders. The notice must set forth specific information regarding such stockholder and such business or director nominee, as described in our certificate of incorporation and bylaws. This requirement is in addition to those set forth in the regulations adopted by the SEC under the Securities Exchange Act of 1934.

Proxy Access

Our bylaws permit a stockholder, or a group of up to 20 stockholders (with funds having specified relationships constituting a single stockholder), owning 3% or more of our outstanding common stock continuously for at least three years to nominate and include in our proxy materials director candidates constituting up to 20% of the board of directors (rounded down to the nearest whole number) or two directors, whichever is greater, provided that the stockholder(s) and the nominee(s) satisfy the requirements specified in the bylaws and subject to the other terms and conditions set forth in the bylaws.

Election of Directors; Majority Voting in Uncontested Elections

Our certificate of incorporation and bylaws provide that, subject to any rights of holders of preferred stock to elect one or more directors, the number of directors shall not be fewer than three or more than 21.

Our certificate of incorporation provides that all directors are to be elected annually. Our bylaws provide for the election of directors by the majority of votes cast by stockholders in uncontested elections and by plurality vote in contested elections. As a condition to being nominated, each nominee for director is required to submit an irrevocable letter of resignation that becomes effective if the nominee does not receive a majority of the votes cast in an uncontested election and the Pioneer Board decides to accept the resignation. If a nominee who is currently serving as a director does not receive a majority of the votes cast for his or her election in an uncontested election, the Pioneer Board will act on the tendered resignation within 90 days after the date of the certification of the election results. If the resignation is not accepted, the Pioneer Board will publicly disclose its decision and its primary rationale, and the director will continue to serve as a director until his or her successor is elected and qualified or until his or her earlier resignation or removal. If the Pioneer Board accepts the resignation, the Pioneer Board may fill the vacancy in accordance with our bylaws or may decrease the size of the Pioneer Board.

Our certificate of incorporation and bylaws provide that vacancies in the board of directors resulting from death, resignation, retirement, disqualification, removal from office or other cause and newly created directorships resulting from any increase in the authorized number of directors shall be filled by a majority vote of the remaining directors then in office, though less than a quorum, or by the sole remaining director.

No Stockholder Action by Written Consent

Our certificate of incorporation provides that stockholders may not act by written consent in lieu of a meeting.

Special Meetings of Stockholders

Special meetings of the stockholders may be called by the Pioneer Board, but may not be called by our stockholders.

Fair Price Provision

Our certificate of incorporation also contains a “fair price” provision that applies to certain business combination transactions involving any person or group that beneficially owns at least 10% of the aggregate

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voting power of our outstanding capital stock, referred to as a “related person.” The “fair price” provision requires the affirmative vote of the holders of:

• at least 80% of the voting power of our outstanding capital stock entitled to vote generally in the election of directors, and

• at least 66 ²/₃% of the voting power of our outstanding capital stock entitled to vote generally in the election of directors that is not beneficially owned by the related person

to approve certain transactions between the related person and us or our subsidiaries, including any merger, consolidation or share exchange, any sale, lease, exchange, pledge or other disposition of our assets or our subsidiaries having a fair market value of at least $10 million, any transfer or issuance of our securities or our subsidiaries’ securities, any adoption of a plan or proposal by us of our voluntary liquidation or dissolution, certain reclassifications of our securities or recapitalizations or certain other transactions, in each case involving the related person.

This voting requirement will not apply to certain transactions, including:

• any transaction in which the consideration to be received by the holders of each class or series of capital stock is:

^○  the same in form and amount as that paid in a tender offer in which the related person acquired at least 50% of the outstanding shares of such class or series and which was consummated not more than one year earlier; or

^○  not less in amount than the highest per share price paid by the related person for shares of such class or series; and

• any transaction approved by our continuing directors.

This provision could have the effect of delaying or preventing change in control in a transaction or series of transactions that do not satisfy the “fair price” criteria.

Exclusive Forum for Adjudication of Disputes

Our bylaws provide that unless we consent in writing to the selection of an alternative forum, the Delaware Court of Chancery (or if the Court of Chancery does not have jurisdiction, the federal district court for the District of Delaware) shall be the sole and exclusive forum for (a) any derivative action or proceeding brought on behalf of us, (b) any action asserting a claim of breach of a fiduciary duty owed by any director, officer, other employee or agent or stockholder of Pioneer to Pioneer or its stockholders, (c) any action against us arising pursuant to any provision of the DGCL or as to which the DGCL confers jurisdiction on the Delaware Court of Chancery, or (d) any action against us or any director, officer, other employee or agent of Pioneer asserting a claim governed by the internal affairs doctrine, including, without limitation, any action to interpret, apply, enforce or determine the validity of our certificate of incorporation or our bylaws, in each case subject to such Court of Chancery (or if the Court of Chancery does not have jurisdiction, the federal district court for the District of Delaware) having personal jurisdiction over the indispensable parties named as defendants therein.

Although we believe this provision benefits us by providing increased consistency in the application of Delaware law in the types of lawsuits to which it applies, the provision may have the effect of discouraging lawsuits against our directors and officers. Although our bylaws contain the choice of forum provision described above, it is possible that a court could rule that the provision is inapplicable for a particular claim or action or that the provision is unenforceable.

Amendments

In addition to any other vote required by law, the provisions of our certificate of incorporation relating to the limitation of actions taken by written consent and the “fair price” provision may be amended only by the

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affirmative vote of the holders of at least 80% of the aggregate voting power of our outstanding capital stock entitled to vote generally in the election of directors.

Our bylaws may be amended by the Pioneer Board or by the affirmative vote of the holders of at least 66 ²/₃% of the aggregate voting power of our outstanding capital stock entitled to vote in the election of directors.

Potential Anti-Takeover Effect

Certain of the foregoing provisions of our certificate of incorporation and bylaws, together with the provisions of Section 203 of the DGCL, could have the effect of delaying, deferring or preventing a change in control or the removal of existing management, of deterring potential acquirors from making an offer to our stockholders and of limiting any opportunity to realize premiums over prevailing market prices for our common stock in connection therewith. This could be the case notwithstanding that a majority of our stockholders might benefit from such a change in control or offer.

Transfer Agent and Registrar

Continental Stock Transfer & Trust Company serves as the registrar and transfer agent for our common stock.

Stock Exchange Listing

Our common stock is listed on the New York Stock Exchange. The trading symbol for our common stock is “PXD.”

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DESCRIPTION OF DEPOSITARY SHARES

General

We may offer fractional shares of preferred stock, rather than full shares of preferred stock. If we do so, we may issue receipts for depositary shares that each represent a fraction of a share of a particular series of preferred stock. The prospectus supplement will indicate that fraction. The shares of preferred stock represented by depositary shares will be deposited under a depositary agreement between us and a bank depositary. The phrase “bank depositary” means a bank or trust company that meets certain requirements and is selected by us. Each owner of a depositary share will be entitled to all the rights and preferences of the preferred stock represented by the depositary share. The depositary shares will be evidenced by depositary receipts issued pursuant to the depositary agreement. Depositary receipts will be distributed to those persons purchasing the fractional shares of preferred stock in accordance with the terms of the offering.

We have summarized some common provisions of a depositary agreement and the related depositary receipts. The forms of the depositary agreement and the depositary receipts relating to any particular issue of depositary shares will be filed with the SEC each time we issue depositary shares, and you should read those documents for provisions that may be important to you.

Dividends and Other Distributions

If we pay a cash distribution or dividend on a series of preferred stock represented by depositary shares, the bank depositary will distribute such dividends to the record holders of such depositary shares. If the distributions are in property other than cash, the bank depositary will distribute the property to the record holders of the depositary shares. However, if the bank depositary determines that it is not feasible to make the distribution of property, the bank depositary may, with our approval, sell such property and distribute the net proceeds from such sale to the record holders of the depositary shares.

Redemption of Depositary Shares

If we redeem a series of preferred stock represented by depositary shares, the bank depositary will redeem the depositary shares from the proceeds received by the bank depositary in connection with the redemption. The redemption price per depositary share will equal the applicable fraction of the redemption price per share of the preferred stock. If fewer than all the depositary shares are redeemed, the depositary shares to be redeemed will be selected by lot or pro rata as the bank depositary may determine.

Voting the Preferred Stock

Upon receipt of notice of any meeting at which the holders of the preferred stock represented by depositary shares are entitled to vote, the bank depositary will mail the notice to the record holders of the depositary shares relating to such preferred stock. Each record holder of these depositary shares on the record date (which will be the same date as the record date for the preferred stock) may instruct the bank depositary as to how to vote the preferred stock represented by such holder’s depositary shares. The bank depositary will endeavor, insofar as practicable, to vote the amount of the preferred stock represented by such depositary shares in accordance with such instructions, and we will take all action that the bank depositary deems necessary in order to enable the bank depositary to do so. The bank depositary will abstain from voting shares of the preferred stock to the extent it does not receive specific instructions from the holders of depositary shares representing such preferred stock.

Amendment and Termination of the Depositary Agreement

The form of depositary receipt evidencing the depositary shares and any provision of the depositary agreement may be amended by agreement between the bank depositary and us. However, any amendment that materially and adversely alters the rights of the holders of depositary shares will not be effective unless such

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amendment has been approved by the holders of at least a majority of the depositary shares then outstanding. The depositary agreement may be terminated by the bank depositary or us only if (1) all outstanding depositary shares have been redeemed or (2) there has been a final distribution in respect of the preferred stock in connection with any liquidation, dissolution or winding up of us and such distribution has been distributed to the holders of depositary shares.

Charges of Bank Depositary

We will pay all transfer and other taxes and governmental charges arising solely from the existence of the depositary arrangements. We will pay charges of the bank depositary in connection with the initial deposit of the preferred stock and any redemption of the preferred stock. Holders of depositary shares will pay other transfer and other taxes and governmental charges and any other charges, including a fee for the withdrawal of shares of preferred stock upon surrender of depositary receipts, as are expressly provided in the depositary agreement to be payable by such holders.

Withdrawal of Preferred Stock

Except as may be provided otherwise in the applicable prospectus supplement, upon surrender of depositary receipts at the principal office of the bank depositary, subject to the terms of the depositary agreement, the owner of the depositary shares may demand delivery of the number of whole shares of preferred stock and all money and other property, if any, represented by those depositary shares. Partial shares of preferred stock will not be issued. If the depositary receipts delivered by the holder evidence a number of depositary shares in excess of the number of depositary shares representing the number of whole shares of preferred stock to be withdrawn, the bank depositary will deliver to such holder at the same time a new depositary receipt evidencing the excess number of depositary shares. Holders of preferred stock thus withdrawn may not thereafter deposit those shares under the depositary agreement or receive depositary receipts evidencing depositary shares therefor.

Miscellaneous

The bank depositary will forward to holders of depositary shares all reports and communications from us that are delivered to the bank depositary and that we are required to furnish to the holders of the preferred stock.

Neither the bank depositary nor Pioneer will be liable if Pioneer is prevented or delayed by law or any circumstance beyond its control in performing its obligations under the depositary agreement. The obligations of the bank depositary and Pioneer under the depositary agreement will be limited to performance in good faith of their respective duties under the depositary agreement, and Pioneer will not be obligated to prosecute or defend any legal proceeding in respect of any depositary shares or preferred stock unless satisfactory indemnity is furnished. Pioneer may rely upon written advice of counsel or accountants, or upon information provided by persons presenting preferred stock for deposit, holders of depositary shares or other persons believed to be competent and on documents believed to be genuine.

Resignation and Removal of Bank Depositary

The bank depositary may resign at any time by delivering to us notice of its election to do so, and we may at any time remove the bank depositary. Any such resignation or removal will take effect upon the appointment of a successor bank depositary and its acceptance of such appointment. The successor bank depositary must be appointed within 60 days after delivery of the notice of resignation or removal and must be a bank or trust company meeting the requirements of the depositary agreement.

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DESCRIPTION OF WARRANTS

General Description of Warrants

We may issue warrants for the purchase of debt securities, preferred stock or common stock. Warrants may be issued independently or together with other securities and may be attached to or separate from any offered securities. Each series of warrants will be issued under a separate warrant agreement to be entered into between us and a bank or trust company, as warrant agent. The warrant agent will act solely as our agent in connection with the warrants and will not have any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants. A copy of the warrant agreement will be filed with the SEC in connection with the offering of warrants.

Debt Warrants

The prospectus supplement relating to a particular issue of warrants to purchase debt securities will describe the terms of those warrants, including the following:

• the title of the warrants;

• the offering price for the warrants, if any;

• the aggregate number of the warrants;

• the designation and terms of the debt securities that may be purchased upon exercise of the warrants;

• if applicable, the designation and terms of the debt securities that the warrants are issued with and the number of warrants issued with each debt security;

• if applicable, the date from and after which the warrants and any debt securities issued with them will be separately transferable;

• the principal amount of debt securities that may be purchased upon exercise of a warrant and the price at which the debt securities may be purchased upon exercise;

• the dates on which the right to exercise the warrants will commence and expire;

• if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time;

• whether the warrants represented by the warrant certificates or the debt securities that may be issued upon exercise of the warrants will be issued in registered or bearer form;

• information relating to book-entry procedures, if any;

• the currency or currency units in which the offering price, if any, and the exercise price are payable;

• if applicable, a discussion of material U.S. federal income tax considerations;

• anti-dilution provisions of the warrants, if any;

• redemption or call provisions, if any, applicable to the warrants;

• any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants; and

• any other information we think is important about the warrants.

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Stock Warrants

The prospectus supplement relating to a particular issue of warrants to purchase common stock or preferred stock will describe the terms of the common stock warrants and preferred stock warrants, including the following:

• the title of the warrants;

• the offering price for the warrants, if any;

• the aggregate number of the warrants;

• the designation and terms of the common stock or preferred stock that maybe purchased upon exercise of the warrants;

• if applicable, the designation and terms of the securities that the warrants are issued with and the number of warrants issued with each security;

• if applicable, the date from and after which the warrants and any securities issued with the warrants will be separately transferable;

• the number of shares of common stock or preferred stock that may be purchased upon exercise of a warrant and the price at which the shares may be purchased upon exercise;

• the dates on which the right to exercise the warrants commence and expire;

• if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time;

• the currency or currency units in which the offering price, if any, and the exercise price are payable;

• if applicable, a discussion of material U.S. federal income tax considerations;

• anti-dilution provisions of the warrants, if any;

• redemption or call provisions, if any, applicable to the warrants;

• any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants; and

• any other information we think is important about the warrants.

Exercise of Warrants

Each warrant will entitle the holder of the warrant to purchase at the exercise price set forth in the applicable prospectus supplement the principal amount of debt securities or shares of preferred stock or common stock being offered. Holders may exercise warrants at any time up to the close of business on the expiration date set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants are void. Holders may exercise warrants as set forth in the prospectus supplement relating to the warrants being offered.

Until a warrant holder exercises such holder’s warrants to purchase our debt securities, preferred stock or common stock, the holder will not have any rights as a holder of our debt securities, preferred stock or common stock, as the case may be, by virtue of the holder’s ownership of warrants.

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DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS

We may issue stock purchase contracts, including contracts obligating holders to purchase from us and contracts obligating us to sell to the holders, a specified number of shares of common stock or other securities at a future date or dates, which we refer to in this prospectus as “stock purchase contracts.” The price per share of the securities and the number of shares of the securities may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula set forth in the stock purchase contracts. The stock purchase contracts may be issued separately or as part of units consisting of a stock purchase contract and debt securities, preferred securities, warrants, U.S. treasury securities or other securities securing the holders’ obligations to purchase the securities under the stock purchase contracts, which we refer to in this prospectus as “stock purchase units.” The stock purchase contracts may require holders to secure their obligations under the stock purchase contracts in a specified manner. The stock purchase contracts also may require us to make periodic payments to the holders of the stock purchase units or vice versa, and those payments may be unsecured or refunded on some basis.

The stock purchase contracts, and, if applicable, collateral or depositary arrangements, relating to the stock purchase contracts or stock purchase units, will be filed with the SEC in connection with the offering of stock purchase contracts or stock purchase units. The prospectus supplement relating to a particular issue of stock purchase contracts or stock purchase units will describe the terms of those stock purchase contracts or stock purchase units, including the following:

• if applicable, a discussion of material U.S. federal income tax considerations; and

• any other information we think is important about the stock purchase contracts or the stock purchase units.

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PLAN OF DISTRIBUTION

We may sell the offered securities in and outside the United States (1) through underwriters or dealers, (2) directly to purchasers, including our affiliates and stockholders, in a rights offering or otherwise, (3) through agents or (4) through a combination of any of these methods. The prospectus supplement will include the following information:

• the terms of the offering;

• the names of any underwriters or agents;

• the name or names of any managing underwriter or underwriters;

• the purchase price or initial public offering price of the securities;

• the net proceeds from the sale of the securities;

• any delayed delivery arrangements;

• any underwriting discounts, commissions and other items constituting underwriters’ compensation;

• any discounts or concessions allowed or reallowed or paid to dealers; and

• any commissions paid to agents.

Sale through Underwriters or Dealers

If underwriters are used in the sale, the underwriters will acquire the securities for their own account for resale to the public, either on a firm commitment basis or a best efforts basis. The underwriters may resell the securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Underwriters may offer securities to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. Unless we inform you otherwise in the prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to certain conditions. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers.

During and after an offering through underwriters, the underwriters may purchase and sell the securities in the open market. These transactions may include overallotment and stabilizing transactions and purchases to cover syndicate short positions created in connection with the offering. The underwriters may also impose a penalty bid, which means that selling concessions allowed to syndicate members or other broker-dealers for the offered securities sold for their account may be reclaimed by the syndicate if the offered securities are repurchased by the syndicate in stabilizing or covering transactions. These activities may stabilize, maintain or otherwise affect the market price of the offered securities, which may be higher than the price that might otherwise prevail in the open market. If commenced, the underwriters may discontinue these activities at any time.

Some or all of the securities that we offer though this prospectus may be new issues of securities with no established trading market. Any underwriters to whom we sell our securities for public offering and sale may make a market in those securities, but they will not be obligated to do so and they may discontinue any market making at any time without notice. Accordingly, we cannot assure you of the liquidity of, or continued trading markets for, any securities that we offer.

If dealers are used in the sale of securities, we will sell the securities to them as principals. The dealers may then resell those securities to the public at varying prices determined by the dealers at the time of resale. We will include in the prospectus supplement the names of the dealers and the terms of the transaction.

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Direct Sales and Sales through Agents

We may sell the securities directly. In this case, no underwriters or agents would be involved. We may also sell the securities through agents designated from time to time. In the prospectus supplement, we will name any agent involved in the offer or sale of the offered securities, and we will describe any commissions payable to the agent. Unless we inform you otherwise in the prospectus supplement, any agent will agree to use its reasonable best efforts to solicit purchases for the period of its appointment.

We may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act of 1933 with respect to any sale of those securities. We will describe the terms of any such sales in the prospectus supplement.

We may also make direct sales through subscription rights distributed to our existing stockholders on a pro rata basis, which may or may not be transferable. In any distribution of subscription rights to our stockholders, if all of the underlying securities are not subscribed for, we may then sell the unsubscribed securities directly to third parties or may engage the services of one or more underwriters, dealers or agents, including standby underwriters, to sell the unsubscribed securities to third parties.

Remarketing Arrangements

Offered securities may also be offered and sold, if so indicated in the applicable prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more remarketing firms, acting as principals for their own accounts or as agents for us. Any remarketing firm will be identified and the terms of its agreements, if any, with us and its compensation will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters, as that term is defined in the Securities Act of 1933, in connection with the securities remarketed.

Delayed Delivery Contracts

If we so indicate in the prospectus supplement, we may authorize agents, underwriters or dealers to solicit offers from certain types of institutions to purchase securities from us at the public offering price under delayed delivery contracts. These contracts would provide for payment and delivery on a specified date in the future. The contracts would be subject only to those conditions described in the prospectus supplement. The prospectus supplement will describe the commission payable for solicitation of those contracts.

General Information

We may have agreements with the agents, dealers, underwriters and remarketing firms to indemnify them against certain civil liabilities, including liabilities under the Securities Act of 1933, or to contribute with respect to payments that the agents, dealers, underwriters or remarketing firms may be required to make. Agents, dealers, underwriters and remarketing firms may be customers of, engage in transactions with, or perform services for us in the ordinary course of their businesses.

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LEGAL MATTERS

Except as set forth in the applicable prospectus supplement, Vinson & Elkins LLP, Dallas, Texas, will pass upon the validity of our debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts and stock purchase units.

EXPERTS

Ernst & Young LLP, independent registered public accounting firm, has audited our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2019, and the effectiveness of our internal control over financial reporting as of December 31, 2019, as set forth in their reports, which are incorporated by reference in this prospectus and elsewhere in the registration statement. Our financial statements are incorporated by reference in reliance on Ernst & Young LLP’s reports, given on their authority as experts in accounting and auditing.

Estimated quantities of our oil and gas reserves and the net present value of such reserves as of December 31, 2019, incorporated by reference in this prospectus are based upon reserve reports prepared by us and audited by Netherland, Sewell & Associates, Inc. with respect to our major properties. The reserve audit conducted by Netherland, Sewell & Associates, Inc. in the aggregate represented 83% of our estimated proved quantities of reserves as of December 31, 2019. We have incorporated these estimates in reliance on the authority of such firm as experts in such matters.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

The following are the estimated expenses of the issuance and distribution of the securities being registered, other than selling or underwriting discounts and commissions, all of which are payable by Pioneer Natural Resources Company (“Pioneer,” “we” or “us”).

Registration fee	$	*
Accountant’s fees and expenses		**
Printing expenses		**
Legal fees and expenses		**
Trustee fees and expenses		**
Miscellaneous		**
Total	$	**

* This registration statement relates to the registration of securities having an unspecified maximum aggregate amount. Payment of the registration fee has been deferred and will be calculated and paid in accordance with Rules 456(b) and 457(r) under the Securities Act of 1933.

** These fees and expenses are based on the securities offered and the number of issuances and accordingly cannot be estimated at this time and will be reflected in the applicable prospectus supplement.

Item 15. Indemnification of Directors and Officers

Delaware General Corporation Law

Section 145(a) of the Delaware General Corporation Law 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 the 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 the person in connection with the action, suit or proceeding if the person acted in good faith and in a manner the 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 the person’s conduct was unlawful.

Section 145(b) of the Delaware General Corporation Law 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 or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the 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 by the person in connection with the defense or settlement of the action or suit if the person acted in good faith and in a manner the 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 the person shall have been adjudged to be liable to the corporation unless and only to the extent that the Delaware Court of Chancery or the court in which the action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, the person is fairly and reasonably entitled to indemnity for the expenses which the Delaware Court of Chancery or such other court shall deem proper.

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Section 145(c) of the Delaware General Corporation Law provides that to the extent that a present or former director or officer of a corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in Section 145(a) and (b), or in defense of any claim, issue or matter therein, the person shall be indemnified against expenses (including attorneys’ fees) actually and reasonably incurred by the person in connection therewith.

Section 145(d) of the Delaware General Corporation Law provides that any indemnification under Section 145(a) and (b) (unless ordered by a court) shall be made by the corporation only as authorized in the specific case upon a determination that indemnification of the present or former director, officer, employee or agent is proper in the circumstances because the person has met the applicable standard of conduct set forth in Section 145(a) and (b). The determination shall be made, with respect to a person who is a director or officer at the time of such determination, (1) by a majority vote of the directors who are not parties to such action, suit or proceeding, even though less than a quorum, (2) by a committee of such directors designated by majority vote of such directors, even though less than a quorum, (3) if there are no such directors, or if such directors so direct, by independent legal counsel in a written opinion, or (4) by the stockholders.

Section 145(e) of the Delaware General Corporation Law provides that expenses (including attorneys’ fees) incurred by an officer or director in defending any civil, criminal, administrative or investigative action, suit or proceeding may be paid by the corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of the director or officer to repay such amount if it shall ultimately be determined that the person is not entitled to be indemnified by the corporation as authorized in Section 145. The expenses (including attorneys’ fees) incurred by former directors and officers or other employees and agents may be so paid upon those terms and conditions, if any, as the corporation deems appropriate.

Section 145(f) of the Delaware General Corporation Law provides that the indemnification and advancement of expenses provided by, or granted pursuant to, Section 145 shall not be deemed exclusive of any other rights to which those seeking indemnification or advancement of expenses may be entitled under any bylaw, agreement, vote of stockholders or disinterested directors or otherwise.

Section 145(g) of the Delaware General Corporation Law provides that a corporation shall have the power to purchase and maintain insurance on behalf of any person who 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 any liability asserted against the person and incurred by the person in any such capacity, or arising out of the person’s status as such, whether or not the corporation would have the power to indemnify the person against such liability under Section 145.

Section 145(j) of the Delaware General Corporation Law provides that the indemnification and advancement of expenses provided by, or granted pursuant to, Section 145 shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the heirs, executors and administrators of such a person.

Amended and Restated Certificate of Incorporation

Article Twelfth of our amended and restated certificate of incorporation, as amended, provides that each person who at any time is or was our director or officer, or any person who, while our director or officer, is or was serving at our request as a director, officer, partner, venturer, proprietor, trustee, employee, agent or similar functionary of another foreign or domestic corporation, limited liability company, association, partnership, joint venture, sole proprietorship, trust, employee benefit plan or other enterprise, shall be entitled to (1) indemnification and (2) the advancement of expenses incurred by such person from Pioneer as, and to the fullest extent, permitted by the Delaware General Corporation Law or any successor statutory provision, as from time to time amended. Any repeal or modification of Article Twelfth of our amended and restated certificate of incorporation, as amended, shall be prospective only, and shall not limit the rights of any director or officer or

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our obligations with respect to any claim arising from the services of such director or officer in the capacities described above prior to any such repeal or amendment of Article Twelfth. Article Twelfth further provides that, in the event of the death of any person having a right of indemnification under the foregoing provisions, such right shall inure to the benefit of his or her heirs, executors, administrators and personal representatives. The rights conferred in Article Twelfth of our amended and restated certificate of incorporation, as amended, are not exclusive of any other right which any person may have or hereafter acquire under any statute, bylaw, resolution of stockholders or directors, agreement or otherwise.

Article Thirteenth of our amended and restated certificate of incorporation, as amended, provides that our directors shall not be personally liable to us or any of our stockholders for monetary damages for breach of fiduciary duty as a director involving any act or omission of any such director; provided, however, that such Article Thirteenth does not eliminate or limit the liability of a director (1) for any breach of such director’s duty of loyalty to us or our stockholders, (2) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (3) under Section 174 of the Delaware General Corporation Law (which relates to certain unlawful dividend payments or stock purchases or redemptions), as the same exists or may hereafter be amended, supplemented or replaced, or (4) for a transaction from which the director derived an improper personal benefit. If the Delaware General Corporation Law is amended to authorize the further elimination or limitation of the liability of directors, then the liability of a director, in addition to the limitation on personal liability described above, shall be limited to the fullest extent permitted by the Delaware General Corporation Law, as so amended. Furthermore, any repeal or modification of Article Thirteenth of our amended and restated certificate of incorporation, as amended, by our stockholders shall be prospective only, and shall not adversely affect any limitation on the personal liability of a director existing at the time of such repeal or modification.

Indemnification Agreements

We have entered into indemnification agreements with our directors and certain of our officers (each, an “Indemnitee”). Each indemnification agreement requires us to indemnify each Indemnitee to the fullest extent permitted by the Delaware General Corporation Law. This means, among other things, that we must indemnify the Indemnitee against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement that are actually and reasonably incurred in an action, suit or proceeding by reason of the fact that the person is or was our director, officer, employee or agent or is or was serving at our request as a director, officer, employee or agent of another corporation or other entity if the Indemnitee meets the standard of conduct provided under Delaware law. Also as permitted under Delaware law, the indemnification agreements require us to advance expenses in defending such an action provided that the Indemnitee undertakes to repay the amounts if the person ultimately is determined not to be entitled to indemnification from us. We will also make the Indemnitee whole for taxes imposed on the indemnification payments and for costs in any action to establish Indemnitee’s right to indemnification, whether or not wholly successful.

In general, the disinterested directors on our board of directors or a committee of disinterested directors have the authority to determine an Indemnitee’s right to indemnification, but the Indemnitee can require that independent legal counsel make this determination if a change in control or potential change in control has occurred. In addition, the Indemnitee can require us to establish a trust fund with a third-party trustee sufficient to satisfy the indemnification obligations and expenses if a change in control or potential change in control has occurred.

The indemnification agreements require us to continue directors’ and officers’ liability insurance coverage for an Indemnitee for six years after the Indemnitee ceases to be a director or officer, and they obligate us to procure up to a six-year run-off policy in the event of a change in control or termination of the person in the year following a change in control of us. The indemnification agreements also limit the period in which we can bring an action against the Indemnitee to three years for breaches of fiduciary duty and to one year for other types of claims.

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D&O Liability Insurance

We maintain directors’ and officers’ liability insurance.

The above discussion of Section 145 of the Delaware General Corporation Law, our amended and restated certificate of incorporation, as amended, the indemnification agreements and our maintenance of directors’ and officers’ liability insurance is not intended to be exhaustive and is respectively qualified in its entirety by such statute and documents.

Item 16. Exhibits

The following documents are filed as exhibits to this Registration Statement:

Exhibit No.	Description
1.1	**	Form of Underwriting Agreement.
4.1		Amended and Restated Certificate of Incorporation of Pioneer, dated June  26, 1997, and Certificate of Amendment of the Amended and Restated Certificate of Incorporation, effective May  18, 2012 (incorporated by reference to Exhibit 3.1 to Pioneer’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, File No.  1-13245).
4.2		Fifth Amended and Restated Bylaws of Pioneer (incorporated by reference to Exhibit 3.1 to Pioneer’s Current Report on Form 8-K, File No. 1-13245, filed with the SEC on May 24, 2016).
4.3		Indenture, dated as of January  13, 1998, between Pioneer and The Bank of New York, as trustee (incorporated by reference to Exhibit 99.1 to Pioneer’s and Pioneer Natural Resources USA, Inc.’s Current Report on Form  8-K, File No. 1-13245, filed with the SEC on January 14, 1998).
4.4		First Supplemental Indenture, dated as of January  13, 1998, by and among Pioneer, Pioneer Natural Resources USA, Inc. and The Bank of New York, as trustee, with respect to the indenture identified above as Exhibit 4.3 (incorporated by reference to Exhibit 99.2 to the Pioneer’s and Pioneer Natural Resources USA, Inc.’s Current Report on Form 8-K, File No. 1-13245, filed with the SEC on January 14, 1998).
4.5		Indenture, dated June  26, 2012, between Pioneer and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 1-13245, filed with the SEC on June 28, 2012).
4.6		First Supplemental Indenture, dated June  26, 2012, by and among Pioneer, Pioneer Natural Resources USA, Inc. and Wells Fargo Bank, National Association, as trustee, with respect to the indenture identified above as Exhibit 4.5 (incorporated by reference to Exhibit 4.2 to Pioneer’s Current Report on Form 8-K, File No. 1-13245, filed with the SEC on June 28, 2012).
4.7		Second Supplemental Indenture, dated December  7, 2015, by and among Pioneer, Pioneer Natural Resources USA, Inc. and Wells Fargo Bank, National Association, as trustee, with respect to the indenture identified above as Exhibit 4.5 (incorporated by reference to Exhibit 4.2 to Pioneer’s Current Report on Form 8-K File No. 1-13245, filed with the SEC on December 7, 2015).
4.8		Indenture, dated May  14, 2020, between Pioneer and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to Pioneer’s Current Report on Form 8-K, File No. 1-13245, filed with the SEC on May 15, 2020).
4.9	**	Form of Debt Securities.
4.10	**	Form of Depositary Agreement.
4.11	**	Form of Depositary Receipt.
4.12	**	Form of Warrant Agreement.
4.13	**	Form of Warrant Certificate.

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Exhibit No.	Description
4.14	**	Form of Stock Purchase Contract.
4.15	**	Form of Stock Purchase Unit.
4.16		Form of Certificate of Common Stock, par value $.01 per share, of Pioneer (incorporated by reference to Exhibit 4.1 to Pioneer’s Registration Statement on Form S-4 (Amendment No. 2), dated June 26, 1997, Registration No. 333-26951).
4.17	**	Form of Certificate of Preferred Stock, par value $.01 per share, of Pioneer.
5.1	*	Opinion of Vinson & Elkins LLP as to the legality of the securities to be registered.
23.1	*	Consent of Ernst & Young LLP.
23.2	*	Consent of Vinson & Elkins LLP (included in the opinion filed as Exhibit 5.1 to this Registration Statement).
23.3	*	Consent of Netherland, Sewell & Associates, Inc.
24.1	*	Powers of Attorney for Pioneer (included on Pioneer’s signature page to this Registration Statement).
25.1	*	Form T-1 Statement of Eligibility under Trust Indenture Act of 1939 of Wells Fargo Bank, National Association under the Indenture.

* Filed herewith.

** To be filed, if necessary, as an exhibit to a post-effective amendment to this Registration Statement or as an exhibit to a Current Report on Form 8-K in connection with a specific offering and incorporated herein by reference.

Item 17. Undertakings

The undersigned registrant hereby undertakes:

(a)(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 of 1933 (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 the 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 end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act if, in the aggregate, the changes in volume and price represent no more than a 20% 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 the Registration Statement or any material change to such information in the Registration Statement;

provided, however, that paragraphs (i), (ii) and (iii) 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 Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 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 part of the Registration Statement.

(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.

II-5

(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:

(A) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) of the Securities Act 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

(B) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) of the Securities Act as part of a registration statement in reliance on Rule 430B of the Securities Act relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) of the Securities Act 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 part of the Registration Statement or made in any such document immediately prior to such effective date.

(5) That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of such undersigned registrant pursuant to this Registration Statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, such undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of such undersigned registrant relating to the offering required to be filed pursuant to Rule 424 of the Securities Act;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of such undersigned registrant or used or referred to by such undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about such undersigned registrant or its securities provided by or on behalf of such undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by such undersigned registrant to the purchaser.

(b) 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 Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) 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.

(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the provisions described under Item 15 above, or otherwise, the registrant has been advised that in the opinion of the Commission, such indemnification is against

II-6

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 director, officer or controlling person of such registrant in the successful defense of any action, suit or proceeding) is asserted by such director, 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 the registrant is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

(d) To file an application for the purpose of determining the eligibility of the trustee under the indentures to act under subsection (a) of Section 310 of the Trust Indenture Act (“Act”) in accordance with the rules and regulations prescribed by the Commission under Section 305(b)(2) of the Act.

II-7

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 Irving, State of Texas, on August 5, 2020.

PIONEER NATURAL RESOURCES COMPANY
By:	/s/ Richard P. Dealy
	Richard P. Dealy
	Executive Vice President and Chief Financial Officer

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Richard P. Dealy, Mark H. Kleinman and Margaret M. Montemayor, and each of them, any of whom may act without the joinder of the other, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any or all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and hereby grants to such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his, her or their substitute or 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.

Signature	Title	Date
/s/ Scott D. Sheffield	Director, President and Chief Executive Officer	August 5, 2020
Scott D. Sheffield	(principal executive officer)
/s/ Richard P. Dealy	Executive Vice President and Chief Financial Officer	August 5, 2020
Richard P. Dealy	(principal financial officer)
/s/ Margaret M. Montemayor	Vice President and Chief Accounting Officer	August 5, 2020
Margaret M. Montemayor	(principal accounting officer)
/s/ J. Kenneth Thompson	Chairman of the Board, Director	August 5, 2020
J. Kenneth Thompson
/s/ Edison C. Buchanan	Director	August 5, 2020
Edison C. Buchanan
/s/ Andrew F. Cates	Director	August 5, 2020
Andrew F. Cates

Signature	Title	Date
/s/ Phillip A. Gobe	Director	August 5, 2020
Phillip A. Gobe
/s/ Larry R. Grillot	Director	August 5, 2020
Larry R. Grillot
/s/ Stacy P. Methvin	Director	August 5, 2020
Stacy P. Methvin
/s/ Royce W. Mitchell	Director	August 5, 2020
Royce W. Mitchell
/s/ Frank A. Risch	Director	August 5, 2020
Frank A. Risch
/s/ Mona K. Sutphen	Director	August 5, 2020
Mona K. Sutphen
/s/ Phoebe A. Wood	Director	August 5, 2020
Phoebe A. Wood
/s/ Michael D. Wortley	Director	August 5, 2020
Michael D. Wortley

EX-5.1

Exhibit 5.1

Tel +1.214.220.7700 Fax +1.214.999.7816

August 4, 2020

Pioneer Natural Resources Company

777 Hidden Ridge

Irving, Texas 75038

Ladies and Gentlemen:

We have acted as counsel for Pioneer Natural Resources Company, a Delaware corporation (the “Company”), in connection with the preparation of the registration statement on Form S-3 (the “Registration Statement”) filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933 (the “Securities Act”), with respect to the Company’s (i) debt securities (the “Debt Securities”), in one or more series, which may be senior or senior subordinated in priority of payment, certain of which may be convertible or exchangeable into common stock, par value $.01 per share, of the Company (“Common Stock”); (ii) shares of Common Stock; (iii) shares of preferred stock, par value $.01 per share, of the Company (“Preferred Stock”), which may be convertible into shares of Common Stock or exchangeable for Debt Securities; (iv) depositary shares representing fractional interests in Preferred Stock (the “Depositary Shares”); (v) warrants to purchase Common Stock, Preferred Stock or Debt Securities (“Warrants”); (vi) contracts to purchase Common Stock or other securities at a future date or dates (the “Stock Purchase Contracts”); and (vii) Stock Purchase Contracts issued as a part of units consisting of a Stock Purchase Contract and Debt Securities, Preferred Stock, Warrants, U.S. treasury securities or other securities securing the holders’ obligations to purchase the securities under the under the Stock Purchase Contracts (the “Stock Purchase Units”) (such Debt Securities, Common Stock, Preferred Stock, Depositary Shares, Warrants, Stock Purchase Contracts and Stock Purchase Units are collectively referred to herein as the “Securities” and each, a “Security”). The Securities may be issued from time to time pursuant to Rule 415 under the Securities Act.

We have examined originals or copies, certified or otherwise identified to our satisfaction, of (i) the Company’s amended and restated certificate of incorporation and its amended and restated bylaws, each as amended to the date hereof (collectively, the “Charter Documents”); (ii) resolutions adopted by the board of directors of the Company (the board of directors, or to the extent permitted by Section 141 of the Delaware General Corporation Law, a duly constituted and acting committee thereof, being referred to herein as the “Board”); (iii) the Indenture, dated June 26, 2012 (the “Indenture”), between the Company and Wells Fargo Bank, National Association, as trustee, included as Exhibit 4.5 to the Registration Statement; and (iv) such other certificates, statutes and other instruments and documents as we considered appropriate for purposes of the opinions hereafter expressed.

Vinson & Elkins LLP Attorneys at Law Austin Dallas Dubai Hong Kong Houston London New York Richmond Riyadh San Francisco Tokyo Washington Trammell Crow Center, 2001 Ross Avenue, Suite 3900
Dallas, TX 75201-2975 Tel +1.214.220.7700 Fax +1.214.220.7716 velaw.com

August 4, 2020 Page 2

As to any facts material to our opinion, we have made no independent investigation of such facts and have relied, to the extent that we deem such reliance proper, upon certificates of public officials and officers or other representatives of the Company.

In rendering the opinions set forth below, we have assumed that (i) all information contained in all documents reviewed by us is true and correct; (ii) all signatures on all documents examined by us are genuine; (iii) all documents submitted to us as originals are authentic and all documents submitted to us as copies conform to the originals of those documents; (iv) each natural person signing any document reviewed by us had the legal capacity to do so; (v) each person signing in a representative capacity (other than on behalf of the Company) any document reviewed by us had authority to sign in such capacity; (vi) the Registration Statement, and any amendments thereto (including post-effective amendments), will have become effective and comply with all applicable laws; (vii) a prospectus supplement will have been prepared and filed with the Commission describing the Securities offered thereby; (viii) all Securities will be issued and sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement and the applicable prospectus supplement; (ix) any supplemental indenture relating to a series of Debt Securities to be issued under the Indenture will be duly authorized, executed and delivered by the parties thereto in substantially the form reviewed by us; (x) a definitive purchase, underwriting or similar agreement with respect to any Securities offered will have been duly authorized and validly executed and delivered by the Company and the other parties thereto; (xi) any Securities issuable upon conversion, exchange or exercise of any Security being offered will have been duly authorized, created and, if appropriate, reserved for issuance upon such conversion, exchange or exercise; and (xii) with respect to shares of Common Stock or Preferred Stock offered, there will be sufficient shares of Common Stock or Preferred Stock authorized under the Company’s Charter Documents and not otherwise reserved for issuance.

Based upon the foregoing, we are of the opinion that:

1. With respect to Debt Securities to be issued under the Indenture, when (i) the Indenture has been duly qualified under the Trust Indenture Act of 1939, as amended (the “TIA”); (ii) the Board has taken all necessary corporate action to approve the issuance and terms of the Debt Securities, the terms of the offering thereof and related matters; (iii) the terms of the Debt Securities and of their issuance and sale have been established so as not to violate any applicable law or result in a default under or breach of any agreement or instrument binding upon the Company and so as to comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company; and (iv) the Debt Securities have been duly executed, authenticated, issued and delivered in accordance with the provisions of the Indenture and in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor provided for therein, the Debt Securities will be legally issued and will constitute valid and binding obligations of the Company, enforceable against the Company in accordance with their terms and will be entitled to the benefits of the Indenture.

August 4, 2020 Page 3

2. With respect to shares of Common Stock, when (i) the Board has taken all necessary corporate action to approve the issuance and terms of the offering thereof and related matters; and (ii) certificates representing the shares of Common Stock have been duly executed, countersigned, registered and delivered either (a) in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor (not less than the par value of the Common Stock) provided for therein, or (b) upon conversion, exchange or exercise of any other Security in accordance with the terms of the Security or the instrument governing the Security providing for the conversion, exchange or exercise as approved by the Board, for the consideration approved by the Board (not less than the par value of the Common Stock), the shares of Common Stock will be legally issued, fully paid and non-assessable.

3. With respect to shares of any series of Preferred Stock, when (i) the Board has taken all necessary corporate action to approve the issuance and terms of the shares of the series, the terms of the offering thereof and related matters, including the adoption of a resolution establishing and designating the series and fixing and determining the preferences, limitations, and relative rights thereof and the filing of a certificate of designations with respect to the series with the Secretary of State of the State of Delaware as required under Section 151 of the Delaware General Corporation Law (the “Certificate of Designations”); and (ii) certificates representing the shares of the series of Preferred Stock have been duly executed, countersigned, registered and delivered either (a) in accordance with the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor (not less than the par value of the Preferred Stock) provided for therein, or (b) upon conversion, exchange or exercise of any other Security in accordance with the terms of the Security or the instrument governing the Security providing for the conversion, exchange or exercise as approved by the Board, for the consideration approved by the Board (not less than the par value of the Preferred Stock), the shares of the series of Preferred Stock will be legally issued, fully paid and non-assessable.

4. With respect to Depositary Shares, when (i) the Board has taken all necessary corporate action to approve the issuance and terms of the Depositary Shares, the terms of the offering thereof and related matters, including the adoption of a Certificate of Designations relating to the Preferred Stock underlying the Depositary Shares and the filing of the Certificate of Designations with the Secretary of State of the State of Delaware; (ii) the depositary agreement or agreements relating to the Depositary Shares and the related depositary receipts have been duly authorized and validly executed and delivered by the Company and the depositary appointed by the Company; (iii) the shares of Preferred Stock underlying the Depositary Shares have been deposited with a bank or trust company (which meets the requirements for the depositary set forth in the Registration Statement) under the applicable depositary agreements; and (iv) the depositary receipts representing the Depositary Shares have been duly executed, countersigned, registered and delivered in accordance with the appropriate depositary agreement approved by the Board upon payment of the consideration therefor provided for therein, the Depositary Shares will be legally issued.

August 4, 2020 Page 4

5. With respect to the Warrants, when (i) the Board has taken all necessary corporate action to approve the creation of and the issuance and terms of the Warrants, the terms of the offering thereof and related matters; (ii) the warrant agreement or agreements relating to the Warrants have been duly authorized and validly executed and delivered by the Company and the warrant agent appointed by the Company; and (iii) the Warrants or certificates representing the Warrants have been duly executed, countersigned, registered and delivered in accordance with the appropriate warrant agreement or agreements and the applicable definitive purchase, underwriting or similar agreement approved by the Board upon payment of the consideration therefor provided for therein, the Warrants will be legally issued.

6. With respect to Stock Purchase Contracts, when (i) the purchase agreement for the Stock Purchase Contracts has been duly authorized and validly executed by the parties thereto; (ii) the Board has taken all necessary corporate action to approve and establish the terms of the Stock Purchase Contracts and to authorize and approve the issuance thereof, the terms of the offering and related matters; and (iii) the Stock Purchase Contracts have been duly executed and delivered in accordance with the purchase agreement and the applicable definitive purchase, underwriting or similar agreement approved by or on behalf of the Board upon payment of the consideration therefor provided for therein, the Stock Purchase Contracts will be legally issued and will constitute valid and binding obligations of the Company enforceable against the Company in accordance with their terms.

7. With respect to Stock Purchase Units, when (i) the purchase agreement for the Stock Purchase Units has been duly authorized and validly executed by the parties thereto; (ii) the Board has taken all necessary corporate action to approve and establish the terms of the Stock Purchase Units and to authorize and approve the issuance thereof, the terms of the offering and related matters; and (iii) the Stock Purchase Units have been duly executed and delivered in accordance with the purchase agreement and the applicable definitive purchase, underwriting or similar agreement approved by or on behalf of the Board upon payment of the consideration therefor provided therein, the Stock Purchase Units will be legally issued and will constitute valid and binding obligations of the Company enforceable against the Company in accordance with their terms.

The foregoing opinions are qualified to the extent that the enforceability of any document, instrument or Security may be limited by or subject to (i) bankruptcy, insolvency, fraudulent transfer or conveyance, reorganization, moratorium or other similar laws relating to or affecting creditors’ rights generally, and general equitable or public policy principles, and (ii) with respect to any Debt Securities denominated in a currency other than United States dollars, the requirement that a claim (or a foreign currency judgment in respect of such a claim) with respect to such Securities be converted to United States dollars at a rate of exchange prevailing on a date determined pursuant to applicable law or governmental authority.

August 4, 2020 Page 5

We express no opinions concerning (i) the validity or enforceability of any provisions contained in the Indenture that purport to waive or not give effect to rights to notices, defenses, subrogation or other rights or benefits that cannot be effectively waived under applicable law or (ii) the enforceability of indemnification provisions to the extent they purport to relate to liabilities resulting from or based upon negligence or any violation of federal or state securities or blue sky laws.

The foregoing opinions are qualified in the following respects: (i) our opinions herein are limited in all respects to the General Corporation Law of the State of Delaware, which includes those statutory provisions as well as all applicable provisions of the Delaware Constitution and the reported judicial decisions interpreting such laws, the laws of the State of New York and the federal laws of the United States of America, and we do not express any opinion as to the applicability of, or the effect thereon, of the laws of any other jurisdiction; (ii) we express no opinion as to any matter other than as set forth herein, and no opinion may be inferred or implied herefrom; and (iii) our opinion is given as of the date hereof, and we undertake no, and hereby disclaim any, obligation to advise you of any change in any matter set forth herein.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. In giving this consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act and the rules and regulations of the Commission issued thereunder.

Very truly yours,

/s/ Vinson & Elkins L.L.P.

EX-23.1

EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in the Registration Statement Form S-3 and related Prospectus of Pioneer Natural Resources Company for the registration of debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts and stock purchase units and to the incorporation by reference therein of our reports dated February 24, 2020, with respect to the consolidated financial statements of Pioneer Natural Resources Company, and the effectiveness of internal control over financial reporting of Pioneer Natural Resources Company, included in its Annual Report (Form 10-K) for the year ended December 31, 2019, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Dallas, Texas

August 5, 2020

EX-23.3

Exhibit 23.3

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

Netherland, Sewell & Associates, Inc. hereby consents to the incorporation by reference in this Registration Statement on Form S-3 of Pioneer Natural Resources Company to be filed on or about August 5, 2020, and in the related Prospectus (collectively, the “Registration Statement”), of all references to our firm and our audit letter dated January 17, 2020, and the information contained therein, included in or made a part of the Annual Report on Form 10-K of Pioneer Natural Resources Company for the year ended December 31, 2019. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

NETHERLAND, SEWELL & ASSOCIATES, INC.
By:	/s/ C.H. (Scott) Rees III
	C.H. (Scott) Rees III, P.E.
	Chairman and Chief Executive Officer

Dallas, Texas

August 5, 2020

EX-25.1

Exhibit 25.1

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY

UNDER THE TRUST INDENTURE ACT OF 1939 OF A

CORPORATION DESIGNATED TO ACT AS TRUSTEE

☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b) (2)

WELLS FARGO BANK, NATIONAL ASSOCIATION

(Exact name of trustee as specified in its charter)

A National Banking Association	94-1347393
(Jurisdiction of incorporation or organization if not a U.S. national bank)	(I.R.S. Employer Identification No.)
101 North Phillips Avenue Sioux Falls, South Dakota	57104
(Address of principal executive offices)	(Zip code)

Wells Fargo & Company

Law Department, Trust Section

MAC N9305-175

Sixth Street and Marquette Avenue, 17^th Floor

Minneapolis, Minnesota 55479

(612) 667-4608

(Name, address and telephone number of agent for service)

PIONEER NATURAL RESOURCES COMPANY

(Exact name of registrant as specified in its charter)

Delaware	75-2702753
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification no.)

777 Hidden Ridge

Irving, Texas 75038

(972) 444-9001

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

DEBT SECURITIES

(Title of the indenture securities)

Item 1. General Information. Furnish the following information as to the trustee:

(a) Name and address of each examining or supervising authority to which it is subject.

Comptroller of the Currency

Treasury Department

Washington, D.C.

Federal Deposit Insurance Corporation

Washington, D.C.

Federal Reserve Bank of San Francisco

San Francisco, California 94120

(b) Whether it is authorized to exercise corporate trust powers.

The trustee is authorized to exercise corporate trust powers.

Item 2. Affiliations with Obligor. If the obligor is an affiliate of the trustee, describe each such affiliation.

None with respect to the trustee.

No responses are included for Items 3-14 of this Form T-1 because the obligor is not in default as provided under Item 13.

Item 15. Foreign Trustee. Not applicable.

Item 16. List of Exhibits. List below all exhibits filed as a part of this Statement of Eligibility.

Exhibit 1.	A copy of the Articles of Association of the trustee now in effect.*
Exhibit 2.	A copy of the Comptroller of the Currency Certificate of Corporate Existence for Wells Fargo Bank, National Association, dated January 14, 2015.*
Exhibit 3.	A copy of the Comptroller of the Currency Certification of Fiduciary Powers for Wells Fargo Bank, National Association, dated January 6, 2014.*
Exhibit 4.	Copy of By-laws of the trustee as now in effect.*
Exhibit 5.	Not applicable.
Exhibit 6.	The consent of the trustee required by Section 321(b) of the Act.
Exhibit 7.	A copy of the latest report of condition of the trustee published pursuant to law or the requirements of its supervising or examining authority.
Exhibit 8.	Not applicable.
Exhibit 9.	Not applicable.

* Incorporated by reference to the exhibit of the same number to the trustee’s Form T-1 filed as exhibit to the Filing 305B2 dated March 13, 2015 of file number 333-190926.

SIGNATURE

Pursuant to the requirements of the Trust Indenture Act of 1939, as amended, the trustee, Wells Fargo Bank, National Association, a national banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Boston and State of Massachusetts on the 3^rd day of August, 2020.

WELLS FARGO BANK, NATIONAL ASSOCIATION

/s/ Patrick T. Giordano

Patrick T. Giordano

Vice President

EXHIBIT 6

August 3, 2020

Securities and Exchange Commission

Washington, D.C. 20549

Gentlemen:

In accordance with Section 321(b) of the Trust Indenture Act of 1939, as amended, the undersigned hereby consents that reports of examination of the undersigned made by Federal, State, Territorial, or District authorities authorized to make such examination may be furnished by such authorities to the Securities and Exchange Commission upon its request therefor.

Very truly yours,

WELLS FARGO BANK, NATIONAL ASSOCIATION

/s/ Patrick T. Giordano

Patrick T. Giordano

Vice President

EXHIBIT 7

Consolidated Report of Condition of

Wells Fargo Bank National Association

of 101 North Phillips Avenue, Sioux Falls, SD 57104

And Foreign and Domestic Subsidiaries,

at the close of business March 31, 2020, filed in accordance with 12 U.S.C. §161 for National Banks.

		Dollar Amounts In Millions
ASSETS
Cash and balances due from depository institutions:
Noninterest-bearing balances and currency and coin		$	21,745
Interest-bearing balances			123,531
Securities:
Held-to-maturity securities			169,848
Available-for-sale securities			242,111
Equity Securities with readily determinable fair value not held for trading			122
Federal funds sold and securities purchased under agreements to resell:
Federal funds sold in domestic offices			82
Securities purchased under agreements to resell			58,438
Loans and lease financing receivables:
Loans and leases held for sale			14,855
Loans and leases, net of unearned income	968,033
LESS: Allowance for loan and lease losses	10,893
Loans and leases, net of unearned income and allowance			957,140
Trading Assets			58,848
Premises and fixed assets (including capitalized leases)			11,733
Other real estate owned			235
Investments in unconsolidated subsidiaries and associated companies			13,202
Direct and indirect investments in real estate ventures			12
Intangible assets			32,598
Other assets			59,196
Total assets		$	1,763,696
LIABILITIES
Deposits:
In domestic offices		$	1,403,302
Noninterest-bearing	452,458
Interest-bearing	950,844
In foreign offices, Edge and Agreement subsidiaries, and IBFs			44,243
Noninterest-bearing	858
Interest-bearing	43,385
Federal funds purchased and securities sold under agreements to repurchase:
Federal funds purchased in domestic offices			2,055
Securities sold under agreements to repurchase			6,389

	Dollar Amounts In Millions
Trading liabilities		15,841
Other borrowed money
(Includes mortgage indebtedness and obligations under capitalized leases)		76,704
Subordinated notes and debentures		12,499
Other liabilities		32,411
Total liabilities	$	1,593,444
EQUITY CAPITAL
Perpetual preferred stock and related surplus		0
Common stock		519
Surplus (exclude all surplus related to preferred stock)		114,728
Retained earnings		54,130
Accumulated other comprehensive income		844
Other equity capital components		0
Total bank equity capital		170,221
Noncontrolling (minority) interests in consolidated subsidiaries		31
Total equity capital		170,252
Total liabilities, and equity capital	$	1,763,696

I, John R. Shrewsberry, Sr. EVP & CFO of the above-named bank do hereby declare that this Report of Condition has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true to the best of my knowledge and belief.

John R. Shrewsberry    

Sr. EVP & CFO          

We, the undersigned directors, attest to the correctness of this Report of Condition and declare that it has been examined by us and to the best of our knowledge and belief has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true and correct.

Directors

Maria R. Morris

Theodore F. Craver, Jr.

Juan A. Pujadas