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REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

As filed with the Securities and Exchange Commission on November 29, 2017.

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

Michelle M. Warner Senior Vice President, General Counsel and Corporate Secretary
550 West Adams Street
Chicago, Illinois 60661-3676(312) 436-4000
Copies to:Timothy J. MeltonJones Day77 West WackerChicago, Illinois 60601(312) 782-3939
(Name, address, including zip code, and telephone number, including area code, of agent for service) Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement.If the only securities being registered on this form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ¨If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. þIf 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. þIf 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 þAccelerated filer¨Smaller reporting company¨
Non-accelerated filer ¨(Do not check if a 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

Proposed MaximumProposed Maximum
Title of Each Class of SecuritiesAmount to beOffering Price PerAggregate OfferingAmount of
to be RegisteredRegistered(1)Unit(1)Price(1)Registration Fee(2)
Debt Securities, Common Stock, par value $0.10 per share, Preferred Stock, Depositary Shares, Warrants, Rights, Purchase Contracts and Units
Preferred Stock Purchase Rights(3)
(1)An indeterminate aggregate initial offering price or number of the securities of each identified class is being registered as may from time to time be offered at indeterminate prices or upon conversion, exchange or exercise of securities registered hereunder to the extent any such securities are, by their terms, convertible into, or exchangeable or exercisable for, such securities. Separate consideration may or may not be received for securities that are issuable on conversion, exchange or exercise of other securities or that are issued in units or represented by depositary shares. The shares of common stock offered by this registration statement shall be deemed to cover such additional securities as may be issued as a result of stock splits, stock dividends or similar transactions.
(2)In accordance with Rules 456(b) and 457(r) under the Securities Act at 1933, as amended (the “Securities Act”), USG Corporation (the “Registrant”) is deferring payment of all of the registration fee.
(3)One Preferred Stock Purchase Right (“Right”) to purchase one one-hundredth of a share of Junior Participating Preferred Stock, Series D, par value $1.00 per share (“Preferred Stock”) for a purchase price of $200 (when exercisable pursuant to the terms of the Rights) will be issued with each share of the Common Stock, par value $0.10 per share (the “Common Stock”), of the Registrant and will be transferable only with the Common Stock. The terms of the Rights are described in the Registrant’s Registration Statement on Form 8-A, as amended, originally filed by the Registrant with the Securities and Exchange Commission on December 21, 2006. No additional registration fee is payable in respect thereof.

Debt Securities

We will provide specific terms about any offering and the specific terms of the securities offered thereby in supplements to this prospectus. You should read this prospectus and the applicable prospectus supplement carefully before you invest. This prospectus may not be used to sell securities unless accompanied by a prospectus supplement. Our common stock trades on the New York Stock Exchange and the Chicago Stock Exchange under the symbol “USG.” Each prospectus supplement will indicate if the securities offered thereby will be listed or quoted on a securities exchange or quotation system.

Investing in our securities involves risks. Please consider carefully the specific factors set forth in our periodic reports filed with the Securities and Exchange Commission, in any applicable prospectus supplement relating to a specific offering of securities and in any other documents we file with the Securities and Exchange Commission. See the section entitled “Risk Factors” on page 4 below, in our other filings with the Securities and Exchange Commission and in the applicable prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

In making your investment decision, you should rely only on the information contained in or incorporated by reference into this prospectus. We have not authorized anyone else to provide you with different information. We are not offering these securities in any jurisdiction where the offer is not permitted. You should not assume that information in this prospectus, any prospectus supplement, any free writing prospectus, any other offering material or any document incorporated herein by reference is accurate as of any date other than the date on the front of the applicable document. Our business, financial condition, operating results and prospects may have changed since those dates.

ABOUT THIS PROSPECTUS 1
FORWARD-LOOKING STATEMENTS 1
WHERE YOU CAN FIND MORE INFORMATION 1
INCORPORATION BY REFERENCE OF CERTAIN DOCUMENTS 2
USG CORPORATION 3
RISK FACTORS 4
USE OF PROCEEDS 5
RATIO OF EARNINGS TO FIXED CHARGES 5
DESCRIPTION OF DEBT SECURITIES 6
DESCRIPTION OF COMMON STOCK 18
DESCRIPTION OF PREFERRED STOCK 21
DESCRIPTION OF DEPOSITARY SHARES 23
DESCRIPTION OF WARRANTS 24
DESCRIPTION OF RIGHTS 25
DESCRIPTION OF PURCHASE CONTRACTS 26
DESCRIPTION OF UNITS 27
MATERIAL FEDERAL INCOME TAX CONSEQUENCES 27
PLAN OF DISTRIBUTION 28
LEGAL OPINIONS 29
EXPERTS 29

This prospectus is part of a registration statement filed by us with the Securities and Exchange Commission, or the SEC, utilizing a “shelf” registration process. Under this shelf process, we may, from time to time, sell any amount of 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 and the securities being offered. The prospectus supplement may also add, update or change information contained in this prospectus. You should read both this prospectus and any applicable prospectus supplement together with additional information described below under the headings “Where You Can Find More Information” and “Incorporation by Reference of Certain Documents.”

In this prospectus, except as otherwise indicated or as the context otherwise requires, “USG,” “we,” “our,” “us” and the “company” refer to USG Corporation, a Delaware corporation. In the discussion of our business in this prospectus, “we,” “our” and “us” also refer to our subsidiaries, unless the context requires otherwise.

This prospectus, including the information we incorporate by reference, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 related to management’s expectations about future conditions. You can generally identify our forward-looking statements by the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “objective,” “plan,” “potential,” “predict,” “projection,” “should,” “will” or other similar words. Any forward-looking statements represent our views only as of the date of this prospectus and should not be relied upon as representing our views as of any subsequent date. We assume no obligation to update any forward-looking information contained in this prospectus. We wish to caution the reader that actual business, market or other conditions, including the “Risk Factors” discussed in our most recent Annual Report on Form 10-K and those described elsewhere in this prospectus or in our other SEC filings, could cause our actual results to differ materially from those stated in the forward-looking statements.

WHERE YOU CAN FIND MORE INFORMATION

We file periodic reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the Internet on the SEC's website at www.sec.gov. You may also read and copy any document we file with the SEC at the SEC's public reference room at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the operation of the public reference room. In addition, we post our filed documents on our website at www.usg.com. Except for documents incorporated by reference into this prospectus, no information contained in, or that can be accessed through, our website is to be considered as part of this prospectus.

INCORPORATION BY REFERENCE OF CERTAIN DOCUMENTS

We “incorporate by reference” into this prospectus 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 considered to be a part of this prospectus, and information in documents that we file later with the SEC will automatically update and supersede information contained in documents filed earlier with the SEC or contained in this prospectus. In other words, in the case of a conflict or inconsistency between information set forth in this prospectus and information incorporated by reference into this prospectus, you should rely on the information contained in this prospectus unless the information incorporated by reference was filed after the date of this prospectus. We incorporate by reference:

We also incorporate by reference any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, or the Exchange Act, until we sell all of the securities we are offering with this prospectus; provided, however, that we are not incorporating any information furnished under Items 2.02 or 7.01 of any Current Report on Form 8-K unless specifically stated otherwise.

We will provide without charge to each person, including any beneficial owner, to whom this prospectus is delivered, upon written or oral request, a copy of any or all documents referred to above that have been or may be incorporated by reference into this prospectus, excluding exhibits to those documents unless they are specifically incorporated by reference into those documents. Any request may be made by writing or calling us at the following address or telephone number:

We are a leading manufacturer of building products and innovative solutions. We produce a wide range of products for use in new residential, new nonresidential, and residential and nonresidential repair and remodel construction as well as products used in certain industrial processes. Our operations are organized into three segments: Gypsum, Ceilings and USG Boral Building Products, or UBBP.

Gypsum: Our Gypsum segment manufactures and markets gypsum and related products in the United States, Canada, Mexico and Latin America. It includes United States Gypsum Company in the United States, CGC Inc., or CGC, in Canada, and USG Mexico, S.A. de C.V., or USG Mexico, and subsidiaries in Latin America. Gypsum’s products are used in a variety of building applications to construct walls, ceilings, roofs and floors of residential and nonresidential buildings, as well as in certain industrial applications. We also produce gypsum-based products for agricultural and industrial customers to use in a wide variety of applications, including soil conditioning, road repair, fireproofing and ceramics. The major product lines within the Gypsum segment are:

WallboardSheetrock® brand gypsum wallboard and Securock® brand glass mat sheathing portfolios
SurfacesSheetrock® brand joint compound portfolio, as well as corner bead, joint tape and plaster
SubstratesDurock® brand cement board, Fiberock® brand backerboard, Levelrock® brand systems of poured gypsum flooring, Securock® brand roof board, ExoAir® 430 brand air-water barrier system, industrial gypsum, and construction plaster products

Ceilings: Our Ceilings segment manufactures and markets interior ceilings systems products in the United States, Canada, Mexico and Latin America. Ceilings includes USG Interiors, LLC in the United States, CGC, and USG Mexico and subsidiaries in Latin America. Ceilings is a leading supplier of interior ceilings products used primarily in nonresidential applications. Ceilings manufactures ceiling tile in the United States and ceiling grid in the United States and Canada. It markets ceiling tile and ceiling grid in the United States, Canada, Mexico, and Latin America. Our integrated line of ceilings products provides qualities such as sound absorption, fire retardation and convenient access to the space above the ceiling for electrical and mechanical systems, air distribution and maintenance. Ceilings’ significant brand names include the Radar™, Eclipse™, Mars™, and Halcyon™ brands of ceiling tile and the Donn®, DX®, Fineline®, Centricitee™, Identitee® DXI™, Curvatura™ and Compasso® brands of ceiling grid.

USG Boral Building Products: UBBP is our 50/50 joint ventures with Boral Limited, or Boral. UBBP manufactures, distributes and sells certain building products, mines raw gypsum and sells natural and synthetic gypsum throughout Asia, Australasia and the Middle East. UBBP manufactures and distributes products for wall, ceiling, floor lining and exterior systems that utilize gypsum wallboard, referred to as plasterboard in the region in which UBBP operates, mineral fiber ceiling tiles, steel grid and joint compound. UBBP's significant brand names include USG Boral Sheetrock® premium plasterboard, USG Boral NextGen®, Elephant®, Jayaboard®, Durock® and Donn® DX®, the world’s most widely specified and installed ceiling suspension system. UBBP launched USG Boral Sheetrock® products, which leverages the technology in USG Sheetrock®, in Australia, South Korea, Indonesia, Vietnam, China and Thailand.

Our principal executive offices are located at 550 West Adams Street, Chicago, Illinois 60661-3676, and our telephone number is (312) 436-4000. We maintain an Internet website at www.usg.com. Except for documents incorporated by reference into this prospectus, no information contained in, or that can be accessed through, our website is to be considered as part of this prospectus.

Investing in our securities involves risks. You should carefully consider the risk factors described in Part I, Item 1A, “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2016 and our other reports filed from time to time with the SEC, which are incorporated by reference into this prospectus, as the same may be amended, supplemented or superseded from time to time by our filings under the Exchange Act, as well as any prospectus supplement relating to a specific security. Before making any investment decision, you should carefully consider these risks as well as other information we include or incorporate by reference in this prospectus or in any applicable prospectus supplement or free writing prospectus. For more information, see the sections entitled “Where You Can Find More Information” and “Incorporation by Reference of Certain Documents” above. These risks could materially affect our business, results of operations or financial condition and affect the value of our securities. You could lose all or part of your investment. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also affect our business, results of operations or financial condition.

Unless otherwise specified in the prospectus supplement, we intend to use the net proceeds from the sale of the securities offered by this prospectus and any accompanying prospectus supplement for general corporate purposes, which may include the repayment of indebtedness, working capital, capital expenditures and acquisitions. The specific allocation of the proceeds from a particular offering of securities will be described in the applicable prospectus supplement.

The table below sets forth our ratio of earnings to fixed charges for the periods indicated.

Nine Months Ended September 30,Year Ended December 31,
201720162015(a)2014(a)2013(a)2012(a)
Ratio of Earnings to Fixed Charges(b)4.4x2.7x
2.2x1.0x1.2x--(c)
(a) Results have been adjusted to reflect L&W Supply Corporation, which was sold on October 31, 2016, as a discontinued operation.
(b) For purposes of computing our ratio of earnings to fixed charges, earnings consist of earnings (loss) from continuing operations before income taxes and equity method earnings plus distributed income of equity method investments; and fixed charges consist of interest expensed, interest capitalized, amortized premiums, discounts and capitalized expenses related to indebtedness, and an estimate of the interest within rental expense less interest capitalized.
(c) As a result of net losses, the amount of the coverage deficiency for the year ended December 31, 2012 was $134 million.

DESCRIPTION OF DEBT SECURITIES

We have summarized certain general terms and provisions of the debt securities that we may offer under this prospectus below. The particular terms of a series of debt securities offered by a prospectus supplement will be described in that prospectus supplement.

The debt securities may be issued under, and entitled to the benefits of, an indenture between us and U.S. Bank National Association, as successor trustee, which we refer to as the indenture, as from time to time supplemented.

We have summarized selected provisions of the indenture below. The following summary does not purport to be a complete description of the indenture, which has been incorporated by reference in this registration statement, and is subject to the detailed provisions of, and qualified in its entirety by reference to, the indenture, including any terms deemed to be a part thereof by the Trust Indenture Act of 1939. Capitalized terms used herein without definition have the respective meanings given such terms in the indenture.

As used under this heading “Description of Debt Securities,” the words “company,” “we,” “our,” “ours” and “us” refer to USG Corporation, the issuer of the debt securities, and not to any of its consolidated subsidiaries.

The indenture does not limit the aggregate principal amount of debt securities that we may issue thereunder. We may issue our debt securities from time to time in one or more series with the same or different terms. All debt securities of any one series need not be issued at the same time, and unless otherwise provided, a series of debt securities may be reopened, without the consent of the holders of outstanding debt securities, for issuances of additional debt securities of that series or to establish additional terms of that series of debt securities (with such additional terms applicable only to unissued or additional debt securities of that series). The terms of each series of debt securities will be established by or pursuant to a resolution of our board of directors and set forth in an officers' certificate or in a supplemental indenture to the indenture.

We will set forth the particular terms of debt securities we offer, as well as any modifications or additions to the general terms of the indenture, in a prospectus supplement relating to the offer of those debt securities, including some or all of the following terms, to the extent required:

Unless otherwise indicated in the applicable prospectus supplement, we will issue debt securities in fully registered form without coupons and in denominations of $1,000 and in integral multiples of $1,000, and interest will be computed on the basis of a 360-day year of twelve 30-day months. If any interest payment date or the maturity date falls on a day that is not a Business Day, then the payment will be made on the next Business Day without additional interest and with the same effect as if it were made on the originally scheduled date. As used under this heading “Description of Debt Securities,” “Business Day” means any calendar day that is not a Saturday, Sunday or legal holiday in New York, New York, and on which commercial banks are open for business in New York, New York.

Unless otherwise indicated in the applicable prospectus supplement, principal of and interest and premium, if any, on the debt securities will be payable at the office of the trustee. Unless otherwise indicated in the applicable prospectus supplement, the trustee will act as paying agent and registrar under the indenture. We may act as paying agent or registrar under the indenture.

The indenture provides that, so long as any of the debt securities remain outstanding, we will not and will not permit any Restricted Subsidiary (as defined below) to, directly or indirectly, issue, assume or guarantee any indebtedness for money borrowed, referred to herein as indebtedness, that is secured by a mortgage, pledge, security interest or other lien or encumbrance, referred to herein as a lien, other than permitted liens, upon or with respect to any Principal Property (as defined below) or on the capital stock of any Restricted Subsidiary unless:

the aggregate amount of all of our consolidated indebtedness secured by liens (other than permitted liens) on any of our Principal Properties or on the capital stock of any of our Restricted Subsidiaries, including all Attributable Debt (as defined below) in respect of sale and leaseback transactions existing at that time, would not exceed the greater of 15% of our Consolidated Net Tangible Assets (as defined below) and $200,000,000, with the exception of transactions that are not subject to the limitation described in “— Limitation on Sale and Leaseback Transactions” below.

The above limitation will not apply to some types of permitted liens. Therefore, the indebtedness secured by those permitted liens is excluded in computing indebtedness for purposes of this limitation. These permitted liens include:

Limitation on Sale and Leaseback Transactions

The indenture provides that, so long as any of the debt securities remains outstanding, neither we nor any Restricted Subsidiary may enter into any arrangement with any person (other than among ourselves and/or our Restricted Subsidiaries) pursuant to which we or a Restricted Subsidiary agree to lease any Principal Property which has been or is to be sold or transferred more than 180 days after the later of the date (1) on which such Principal Property has been acquired by us or a Restricted Subsidiary and (2) of completion of construction and commencement of full operation thereof, by us or a Restricted Subsidiary to that person, referred to herein as a Sale and Leaseback Transaction. Sale and Leaseback Transactions with respect to facilities financed with specified tax exempt securities are excepted from the definition. This covenant does not apply to leases of a Principal Property for a term of less than three years.

This limitation also does not apply to any Sale and Leaseback Transaction if:

the prepayment or retirement of our Funded Debt (as defined below), which may include debt securities; provided, however, that in lieu of applying all or any part of such net proceeds or fair market value to such retirement, we may at our option (1) deliver to the trustee debt securities previously purchased or otherwise acquired by us or (2) receive credit for debt securities previously redeemed by us, which, in either case, have not previously been applied by us in lieu of retiring Funded Debt as required pursuant to this restriction. If we shall so deliver such debt securities to the trustee (or receive credit for debt securities so delivered), the amount of cash which we shall be required to apply to the retirement of Funded Debt pursuant to this restriction shall be reduced by an amount equal to the aggregate principal amount of such debt securities; or

“Attributable Debt,” in respect of the Sale and Leaseback Transactions described above, means as of any particular time, the present value, calculated using a rate of interest implicit in such transaction determined in accordance with generally accepted accounting principles in the United States, of the obligation of a lessee for rental payments during the remaining term of any lease, including any period for which that lease has been extended or may, at the option of the lessor, be extended after excluding all amounts required to be paid in respect of maintenance and repairs, insurance, taxes, assessments, water and utility rates, management fees and similar charges.

“Consolidated Net Tangible Assets” means as of any particular date the aggregate amount of assets, reduced by applicable reserves and other properly deductible items, after deducting:

“Funded Debt” means all indebtedness (other than intercompany indebtedness among us and our subsidiaries) for the repayment of money borrowed, whether or not evidenced by a bond, debenture, note or similar instrument or agreement, having a final maturity of more than 12 months after the date of its creation or having a final maturity of less than 12 months after the date of its creation but by its terms being renewable or extendible beyond 12 months after such date at the option of the borrower (excluding obligations under any Capital Leases). When determining “Funded Debt,” indebtedness will not be included if, on or prior to the final maturity of that indebtedness, we have deposited the necessary funds for the payment, redemption or satisfaction of that indebtedness in trust with the proper depositary.

“Principal Property” means, as of any date any lien thereon is to become effective, any building, structure or other facility, together with the land upon which it is erected and any fixtures which are a part of the building, structure or other facility, used primarily for manufacturing, processing or production (other than any such land, building, structure or other facility or portion thereof which is a pollution control facility or sewage or waste disposal facility), in each case located in the United States, and owned or leased or to be owned or leased by us or any consolidated subsidiary, and in each case the net book value of which as of that date exceeds 1% of our Consolidated Net Tangible Assets, other than any such land, building, structure or other facility or portion thereof which is financed through the issuance of tax-exempt government obligations or which in the opinion of our board of directors, is not of material importance to the total business conducted by us and our consolidated subsidiaries, considered as one enterprise.

“Restricted Subsidiary” means a subsidiary of our company that owns a Principal Property.

Restrictions on Mergers and Sales of Assets

The indenture permits a consolidation or merger between us and another entity and/or the sale or transfer by us of all or substantially all of our property and assets, provided that:

If we consolidate or merge with or into any other entity or sell or lease all or substantially all of our assets in compliance with the terms and conditions of the indenture, the resulting or acquiring entity will be substituted for us in the indenture with the same effect as if it had been an original party to the indenture. As a result, such successor entity may exercise our rights and powers under the indenture, in our name and, except in the case of a lease, we will be released from all our liabilities and obligations under the indenture and under the debt securities issued thereunder.

Notwithstanding the foregoing provisions, we may transfer all of our property and assets to another entity if, immediately after giving effect to the transfer, such corporation is our Wholly-Owned Restricted Subsidiary (as defined below).

The term “Wholly-Owned Restricted Subsidiary” means any Restricted Subsidiary in which we and/or our other wholly-owned subsidiaries own all of the outstanding capital stock (other than directors' qualifying shares).

Under the indenture, certain of our rights and obligations and certain of the rights of the holders of the debt securities may be modified or amended with the consent of the holders of not less than a majority of the total principal amount of the outstanding debt securities affected by the modification or amendment. However, the following modifications and amendments will not be effective against any holder without its consent:

Under the indenture, the holders of at least a majority of the total principal amount of the outstanding debt securities may, on behalf of all holders of the debt securities:

The term “event of default,” when used in the indenture, means any of the following:

If an event of default occurs and continues, the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities, by notice in writing to us, may declare the entire principal of all the debt securities to be due and payable immediately, except that, if the event of default is caused by certain events in bankruptcy, insolvency or reorganization, the entire principal of all of the debt securities will become due and payable immediately without any act on the part of the trustee or holders of the debt securities. If such a declaration occurs, the holders of a majority of the aggregate principal amount of the outstanding debt securities can, subject to conditions, rescind the declaration.

The indenture requires us to file an officers’ certificate with the trustee each year that states, to the knowledge of the certifying officer, no defaults exist under the terms of the indenture. The trustee may withhold notice to the holders of debt securities of any default, except defaults in the payment of principal, premium or interest, if it considers the withholding of notice to be in the best interests of the holders. For purposes of this paragraph, “default” means any event which is, or after notice or lapse of time or both would become, an event of default under the indenture.

The trustee is not obligated to exercise any of its rights or powers under the indenture at the request, order or direction of any holders of debt securities, unless the holders offer the trustee satisfactory indemnification. If satisfactory indemnification is provided, then, subject to other rights of the trustee, the holders of a majority in aggregate principal amount of the outstanding debt securities may direct the time, method and place of:

The holder of a debt security will have the right to begin any proceeding with respect to the indenture or for any remedy only if:

However, the holder of any debt security will have an absolute right to receive payment of principal of, and any premium and interest on, the debt security when due and to institute suit to enforce this payment.

The term “U.S. Government Obligations” means direct obligations of the United States of America backed by the full faith and credit of the United States.

In the event that we deposit money and/or U.S. Government Obligations in trust and discharge our obligations under debt securities as described above, then:

Defeasance of Certain Covenants and Certain Events of Default

If we make the deposit and deliver the opinion of counsel described under the heading “— Defeasance and Discharge” above, we will not have to comply with the restrictive covenants contained in the indenture.

In the event of a defeasance, our obligations under the indenture and the debt securities, other than with respect to the restrictive covenants and related events of default specifically referred to above, will remain in effect.

If we exercise our option not to comply with the covenants listed above and the debt securities become immediately due and payable because an event of default has occurred, other than as a result of the event of default specifically referred to above, the amount of money and/or U.S. Government Obligations on deposit with the trustee will be sufficient to pay amounts due on the debt securities on the date the payments are due under the indenture and the terms of the debt securities, but may not be sufficient to pay amounts due at the time of acceleration. However, we would remain liable for the balance of the payments.

We can, at any time, withdraw any money or U.S. Government Obligations deposited pursuant to the defeasance provisions described above if we simultaneously substitute other money and/or U.S. Government Obligations which would satisfy our payment obligations on the debt securities pursuant to the defeasance provisions applicable to the debt securities.

Unless otherwise indicated in the applicable prospectus supplement, we will issue each debt security in book-entry form only. Each debt security issued in book-entry form will be represented by a global security that we deposit with and register in the name of one or more financial institutions or clearing systems, or their nominees, which we select. A financial institution or clearing system that we select for any security for this purpose is called the “depositary” for that security. The depositary holds the debt securities on behalf of other financial institutions that participate in the depositary's book-entry system; these participating institutions, in turn, hold beneficial interests in the securities on behalf of themselves or their customers. Under the indenture, only the person in whose name a security is registered is recognized as the holder of that security. Consequently, for securities issued in global form, we will recognize only the depositary as the holder of the securities and we will make all payments on the securities, including deliveries of any property other than cash, to the depositary. The depositary passes along the payments it receives to its participants, which in turn pass the payments along to their customers who are the beneficial owners. The depositary and its participants do so under agreements they have made with one another or with their customers; they are not obligated to do so under the terms of the securities. As a result, investors will not own securities directly. Instead, they will own beneficial interests in a global security, through a bank, broker or other financial institution that participates in the depositary's book-entry system or holds an interest through a participant. As long as the securities are issued in global form, investors will be indirect owners, and not holders, of the securities.

Unless otherwise indicated in the applicable prospectus supplement, the Depository Trust Company, or DTC, will act as the depositary for the debt securities. The debt securities will be issued as fully-registered securities registered in the name of Cede & Co. (DTC's partnership nominee) or such other name as may be requested by an authorized representative of DTC. One fully-registered security certificate will be issued for each issue of debt securities, each in the aggregate principal amount of such issue, and will be deposited with DTC. If, however, the aggregate principal amount of any issue exceeds $500 million, one certificate will be issued with respect to each $500 million of principal amount, and an additional certificate will be issued with respect to any remaining principal amount of such issue.

The following information in this section concerning DTC and DTC's book-entry system has been obtained from sources that we believe to be reliable, but we take no responsibility for the accuracy or completeness thereof.

DTC is a limited-purpose trust company organized under the New York Banking Law, 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 and a “clearing agency” registered pursuant to the provisions of Section 17A of the Exchange Act. DTC holds and provides asset servicing for U.S. and non-U.S. equity issues, corporate and municipal debt issues and money market instruments that DTC's participants, referred to herein as direct participants, deposit with DTC. DTC also facilitates the post-trade settlement among direct participants of sales and other securities transactions in deposited securities, through electronic computerized book-entry transfers and pledges between direct participants' accounts. This eliminates the need for physical movement

of securities certificates. Direct participants include both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. DTC is a wholly-owned subsidiary of The Depository Trust & Clearing Corporation, or DTCC. DTCC is owned by the users of its regulated subsidiaries. Access to the DTC system is also available to others such as both U.S. and non-U.S. securities brokers and dealers, banks, trust companies and clearing corporations that clear through or maintain a custodial relationship with a direct participant, either directly or indirectly, referred to herein as indirect participants. The DTC Rules applicable to its participants are on file with the SEC. More information about DTC can be found at www.dtcc.com.

Purchases of debt securities under the DTC system must be made by or through direct participants, which will receive a credit for the securities on DTC's records. The ownership interest of each actual purchaser of each debt security, or the beneficial owner, is in turn to be recorded on the direct and indirect participants' records. Beneficial owners will not receive written confirmation from DTC of their purchase. Beneficial owners are, however, expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the direct or indirect participant through which the beneficial owner entered into the transaction. Transfers of ownership interests in the debt securities are to be accomplished by entries made on the books of direct and indirect participants acting on behalf of beneficial owners. Beneficial owners will not receive certificates representing their ownership interests in debt securities, except in the event that use of the book-entry system for the debt securities is discontinued.

To facilitate subsequent transfers, all debt securities deposited by direct participants with DTC are registered in the name of DTC's partnership nominee, Cede & Co., or such other name as may be requested by an authorized representative of DTC. The deposit of debt securities with DTC and their registration in the name of Cede & Co. or such other DTC nominee do not effect any change in beneficial ownership. DTC has no knowledge of the actual beneficial owners of the debt securities; DTC's records reflect only the identity of the direct participants to whose accounts such debt securities are credited, which may or may not be the beneficial owners. The direct and indirect participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to direct participants, by direct participants to indirect participants and by direct participants and indirect participants to beneficial owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time. Beneficial owners of debt securities may wish to take certain steps to augment the transmission to them of notices of significant events with respect to the debt securities, such as redemptions, tenders, defaults and proposed amendments to the security documents. For example, beneficial owners of debt securities may wish to ascertain that the nominee holding the securities for their benefit has agreed to obtain and transmit notices to beneficial owners. In the alternative, beneficial owners may wish to provide their names and addresses to the registrar and request that copies of notices be provided directly to them.

Redemption notices will be sent to DTC. If less than all of the debt securities within an issue are being redeemed, DTC's practice is to determine by lot the amount of the interest of each direct participant in such issue to be redeemed.

Neither DTC nor Cede & Co. (nor any other DTC nominee) will consent or vote with respect to securities unless authorized by a direct participant in accordance with DTC's procedures. Under its usual procedures, DTC mails an omnibus proxy to us as soon as possible after the record date. The omnibus proxy assigns Cede & Co.'s consenting or voting rights to those direct participants to whose accounts securities are credited on the record date (identified in a listing attached to the omnibus proxy).

Redemption proceeds, distributions and dividend payments on the debt securities will be made to Cede & Co., or such other nominee as may be requested by an authorized representative of DTC. DTC's practice is to credit direct participants' accounts upon DTC's receipt of funds and corresponding detail information from us or our agent, on payable date in accordance with their respective holdings shown on DTC's records. Payments by participants to beneficial owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in “street name,” and will be the responsibility of such participant and not of DTC (or its nominee), our agent or us, subject to any statutory or regulatory

requirements as may be in effect from time to time. Payment of redemption proceeds, distributions and dividend payments to Cede & Co. (or such other nominee as may be requested by an authorized representative of DTC) is the responsibility of us or our agent. Disbursement of such payments to direct participants will be the responsibility of DTC, and disbursement of such payments to the beneficial owners will be the responsibility of direct and indirect participants. Neither we nor the trustee will have any responsibility or liability for any aspect of the records relating to, or payments made on account of, beneficial ownership interests in a debt security; for maintaining, supervising or reviewing any records relating to such beneficial ownership interests; or for any other aspect of the relationship between DTC and its participants or the relationship between such participants and the beneficial owners of interests in a debt security.

DTC may discontinue providing its services as depositary with respect to the debt securities at any time by giving reasonable notice to us or our agent. Under such circumstances, in the event that a successor depositary is not obtained, certificates for the debt certificates are required to be printed and delivered. In addition, we may decide to discontinue use of the system of book-entry transfers through DTC (or a successor securities depositary). In that event, certificates for the debt securities will be printed and delivered.

We will give notices by mail to holders at the addresses listed in the security register.

We will replace any mutilated security at the holder's expense upon surrender of the security to the trustee. We will replace securities issued pursuant to the indenture that become destroyed, stolen or lost at the holder's expense upon delivery to the trustee of the security or evidence of the destruction, loss or theft satisfactory to us and the trustee. In the case of a destroyed, lost or stolen security issued pursuant to the indenture, an indemnity satisfactory to the trustee and us may be required at the holder's expense before we will issue a replacement security.

The indenture and the debt securities will be governed by, and construed in accordance with, the laws of the State of New York.

Information Concerning the Trustee

U.S. Bank National Association, is the trustee under the indenture. From time to time, we maintain deposit accounts and conduct other banking transactions with the trustee in the ordinary course of business.

The following summary description sets forth some of the general terms and provisions of our common stock. Because this is a summary description, it does not contain all of the information that may be important to you. For a more detailed description of the common stock, you should refer to the provisions of our Restated Certificate of Incorporation, referred to herein as our Restated Certificate of Incorporation, our Amended and Restated By-laws, referred to herein as our By-laws, and the form of stock certificate, each of which has been incorporated by reference as an exhibit to this registration statement.

The total number of shares of capital stock that we have authority to issue is 236 million, consisting of 200 million shares of common stock, par value $0.10 per share, and 36 million shares of preferred stock, par value $1.00 per share. As of September 30, 2017, approximately 141 million shares of common stock were outstanding, and no shares of preferred stock were outstanding.

The issued and outstanding shares of common stock are validly issued, fully paid and nonassessable. Subject to the prior rights of the holders of any preferred stock, the holders of outstanding shares of common stock are entitled to receive dividends out of assets legally available therefor at the times and in the amounts as our board of directors may from time to time determine. Our credit agreement limits our ability to pay a dividend or repurchase our stock unless specified borrowing availability and fixed charge coverage ratio tests are met, and it prohibits payment of a dividend or repurchase of our stock if a default exists under the agreement. In addition, we have not paid a dividend on our common stock since the first quarter of 2001 and there can be no assurance that we will do so in the foreseeable future. In the event we enter into additional debt financing arrangements, our ability to pay cash dividends on our common stock is likely to be restricted under those documents.

Upon liquidation, dissolution or winding up of our company, the holders of common stock are entitled to receive pro rata the assets of the company that are legally available for distribution, after payment of all debts and other liabilities and subject to the prior rights of holders of any preferred stock then outstanding. Each outstanding share of common stock is entitled to one vote on all matters submitted to a vote of stockholders. There is no cumulative voting. Holders of common stock have no conversion, preemptive or other subscription rights, and there are no redemption rights or sinking fund provisions with respect to the common stock. There is no liability for further calls or for assessments by us.

Certain Provisions of the Restated Certificate of Incorporation and By-laws

Our Restated Certificate of Incorporation and By-laws contain certain provisions that are intended to enhance the likelihood of continuity and stability in the composition of our board of directors and that may have the effect of delaying, deferring or preventing a future takeover or change in control of our company unless the takeover or change in control is supported by our board of directors. The provisions may also render the removal of the current board more difficult.

Our Restated Certificate of Incorporation provides for three classes of directors, each of which is to be elected on a staggered basis for a term of three years. At present, our board of directors is composed of nine directors.

The affirmative vote or consent of at least 80% of the voting power of all of our stock entitled to vote in the election of directors is required to approve certain types of transactions with a beneficial owner of more than 5% of the outstanding shares of any class of our stock that is entitled to vote generally in the election of directors. The transactions include a merger or consolidation of us or any of our subsidiaries, sale of all or substantially all of our assets or any of our subsidiaries or the sale or lease of any assets (except assets having an aggregate fair market value of less than $10 million) in exchange for certain types of securities. Our board of directors may render the super-majority voting requirements inapplicable by (a) approving a memorandum of understanding with the other corporation, person or entity with respect to such a transaction prior to the time that the corporation, person or entity becomes the beneficial owner of more than 5% of any class of voting stock or (b) approving such a transaction after the time that the greater

than 5% holder acquires such beneficial ownership if a majority of the members of our board approving the transaction were duly elected and acting members of our board prior to the time that the other corporation, person or entity became a greater than 5% stockholder.

Any action to be taken at any annual or special meeting of our stockholders may only be taken without a meeting if a consent in writing is signed by the holders of at least 80% of the voting power entitled to vote with respect to that subject matter.

The provisions in our Restated Certificate of Incorporation described above may only be amended by 80% of the voting power entitled to vote in the election of directors.

In addition, our Restated Certificate of Incorporation restricts certain transfers of our common stock. These transfer restrictions are intended to protect the tax benefits of our net operating loss, or NOL, carryforwards. Subject to certain limited exceptions, these transfer restrictions restrict any person from transferring our common stock (or any interest in our common stock) if the transfer would result in a stockholder (or several stockholders, in the aggregate, who hold their stock as a “group” under Section 382 of the Internal Revenue Code of 1986, as amended, or the Code) owning 4.9% or more of our common stock. Any direct or indirect transfer attempted in violation of these transfer restrictions would be void as of the date of the prohibited transfer as to the purported transferee, and the purported transferee would not be recognized as the owner of the shares attempted to be owned in violation of the transfer restrictions for any purpose, including for purposes of voting and receiving dividends or other distributions in respect of that common stock, or in the case of options, receiving our common stock in respect of their exercise. These transfer restrictions are effective until the earliest of (i) the close of business on May 31, 2019, (ii) the repeal of Section 382 of the Code if our board of directors determines that these restrictions are no longer necessary or desirable for the preservation of tax benefits, (iii) the close of business on the first day of a taxable year as to which our board of directors determines that no tax benefits may be carried forward, or (iv) such other date as determined by our board of directors pursuant to the provisions described above.

As of the date of this prospectus, there are no shares of preferred stock issued or outstanding. Our board of directors may, without further action by our stockholders, from time to time, direct the issuance of shares of preferred stock in one or more series and may, at the time of issuance, determine the rights, preferences and limitations of each series. Satisfaction of any dividend preferences of outstanding shares of preferred stock would reduce the amount of funds available for the payment of dividends on shares of common stock. Holders of shares of preferred stock may be entitled to receive a preference payment in the event of any liquidation, dissolution or winding-up of our company before any payment is made to the holders of shares of common stock. Under certain circumstances, the issuance of shares of preferred stock may render more difficult or tend to discourage a merger, tender offer or proxy contest, the assumption of control by a holder of a large block of our securities or the removal of incumbent management. Our board of directors, without stockholder approval, may issue shares of preferred stock with voting and conversion rights that could adversely affect the holders of shares of common stock.

We are governed by the provisions of Section 203 of the General Corporation Law of the State of Delaware, or the DGCL. In general, Section 203 of the DGCL prohibits us from engaging in a “business combination” with an “interested stockholder” for a period of three years following the time that the stockholder became an interested stockholder, unless the business combination is approved in a prescribed manner. Business combinations, for purposes of Section 203 of the DGCL, include mergers, asset sales and other transactions resulting in a financial benefit to the stockholder. An “interested stockholder” is a person who, together with affiliates and associates, owns (or within three years, did own) 15% or more of our voting stock, but excludes persons who acquire over 85% of our voting stock in a tender offer.

We have a stockholder rights plan, or the rights plan, established under the terms of a rights agreement dated December 21, 2006, as amended, with Computershare Trust Company N.A., or the Rights Agreement. The rights plan is intended to protect our substantial NOL carryforwards and related tax benefits. Under federal tax laws, we generally can use our NOLs and certain related tax credits to reduce ordinary income tax paid in our prior two tax years or on our future taxable income for up to 20 years, when they “expire” for such purposes.

Our ability to use our NOLs could be substantially limited if we experience an “ownership change,” as defined under Section 382 of the Code, and the rights plan has been designed to help prevent such an “ownership change.” Under Section 382 of the Code, an “ownership change” occurs if, over a rolling three-year period, there has been an aggregate increase of 50 percentage points or more in the percentage of our common stock owned by one or more of our “5-percent stockholders” (as determined under Section 382 of the Code). The rights plan provides that if any person becomes the beneficial owner (as defined in the Code) of 4.9% or more of our common stock, stockholders other than the triggering stockholder will have the right to purchase additional shares of our common stock at half the market price, thereby diluting the triggering stockholder; provided that stockholders whose beneficial ownership, as defined in Section 382 of the Code, exceeded 4.9% of our common stock outstanding on February 11, 2015 will not be deemed to have triggered the rights plan, so long as they do not thereafter acquire beneficial ownership of additional common stock other than in certain specified exempt transactions.

The rights will expire at the close of business on May 31, 2019, unless earlier redeemed or exchanged. Our board of directors has the power to accelerate or extend the expiration date of the rights. The NOL protective provisions of the rights plan described above will be effective until the earliest of the close of business on (i) May 31, 2019, (ii) the date on which our board of directors determines that these provisions are no longer necessary for the protection of certain tax benefits because of the repeal of Section 382 of the Code, (iii) the first day of a taxable year as to which our board of directors determines that no tax benefits may be carried forward, or (iv) such other date as our board of directors determines that these provisions are no longer necessary for the preservation of tax benefits, which period is referred to as the Special Period. After the end of the Special Period, the triggering threshold for the rights issued pursuant to the rights plan will revert to 15% of our outstanding common stock and the definition of “beneficial owner” will revert to definitions that do not track Section 382 of the Code. At our 2016 annual meeting our stockholders ratified, on an advisory basis, the extension of the term of the rights plan and the NOL protective provisions described above.

Pursuant to a Shareholder’s Agreement reached in 2006, Berkshire Hathaway and certain of its affiliates may acquire beneficial ownership of up to 50% of our voting stock on a fully-diluted basis without triggering the ownership thresholds in our Restated Certificate of Incorporation or the rights plan, and may acquire beneficial ownership of more than 50% of our voting stock on a fully-diluted basis without triggering the ownership thresholds in our Restated Certificate of Incorporation or the rights plan through an offer to purchase all of our common stock that remains open for at least 60 days, in each case subject to specified exceptions.

Limitations on Liability and Indemnification of Directors and Officers

Our Restated Certificate of Incorporation limits the liability of directors to the fullest extent permitted by the DGCL. In addition, our By-laws and separate indemnification agreements provide that we must indemnify our directors and officers to the extent permitted by the DGCL.

The transfer agent and registrar for our common stock is Computershare Trust Company, N.A.

Under our Restated Certificate of Incorporation, our board of directors may direct the issuance of up to 36 million shares of preferred stock, par value $1.00 per share, in one or more series and with rights, preferences, privileges and restrictions, including dividend rights, voting rights, conversion rights, terms of redemption and liquidation preferences, that are fixed in the Restated Certificate of Incorporation or that may be fixed or designated by the board of directors pursuant to a certificate of designation without any further vote or action by our stockholders. Under our Restated Certificate of Incorporation, two million shares of Junior Participating Preferred Stock, Series C, par value $1.00 per share, and four million shares of Junior Participating Preferred Stock, Series D, par value $1.00 per share, have been designated for possible issuance. Each right issued under our rights plan will, upon the occurrence of a triggering event under the Rights Agreement, entitle the holder of the right, other than the triggering stockholder, to purchase 1/100th of a share of the Junior Participating Preferred Stock, Series D. As of the date of this prospectus, the board of directors has not designated any additional series of preferred stock. The issuance of preferred stock may have the effect of delaying, deferring or preventing a change in control of USG. Preferred stock, upon issuance against full payment of the purchase price therefor, will be fully paid and nonassessable. The specific terms of a particular series of preferred stock will be described in the prospectus supplement relating to that series. The description of preferred stock set forth below and the description of the terms of a particular series of preferred stock set forth in the related prospectus supplement do not purport to be complete and are qualified in their entirety by reference to the certificate of designation relating to that series.

As of the date of this prospectus, there are no shares of preferred stock issued or outstanding.

The rights, preferences, privileges and restrictions of the preferred stock of each series will be fixed by our Restated Certificate of Incorporation or the certificate of designation relating to such series. A prospectus supplement will specify the terms of the preferred stock, including the following:

In the event of any voluntary liquidation, dissolution or winding up of our affairs, the holders of any series of any class of preferred stock shall be entitled to receive in full out of our assets, including our capital, before any amount shall be paid or distributed among the holders of the common stock or any other shares ranking junior to such series, the amounts fixed by our board of directors with respect to such series and set forth in the applicable prospectus supplement plus an amount equal to all dividends accrued and unpaid thereon to the date of payment of the amount due pursuant to such liquidation, dissolution or winding up of our affairs. After payment to the holders of the preferred stock of the full preferential amounts to which they are entitled, the holders of preferred stock, as such, shall have no right or claim to any of our remaining assets.

If liquidating distributions shall have been made in full to all holders of preferred stock, our remaining assets shall be distributed among the holders of any other classes or series of capital stock ranking junior to the preferred stock upon liquidation, dissolution or winding up, according to their respective rights and preferences and in each case according to their respective numbers of shares.

We may offer depositary shares (either separately or together with other securities) representing fractional interests in our debt securities or preferred stock of any series. The following description sets forth certain general terms and provisions of the depositary shares to which any prospectus supplement may relate. The particular terms of the depositary shares to which any prospectus supplement may relate and the extent, if any, to which the general terms and provisions may apply to the depositary shares so offered will be described in the applicable prospectus supplement. To the extent that any particular terms of the depositary shares, deposit agreements and depositary receipts described in a prospectus supplement differ from any of the terms described below, then the terms described below will be deemed to have been superseded by that prospectus supplement. We encourage you to read the applicable deposit agreement and depositary receipts for additional information before you decide whether to purchase any of our depositary shares.

In connection with the issuance of any depositary shares, we will enter into a deposit agreement with a bank or trust company, as depositary, which will be named in the applicable prospectus supplement. Depositary shares will be evidenced by depositary receipts issued pursuant to the related deposit agreement. Immediately following our issuance of the security related to the depositary shares, we will deposit the debt securities or shares of our preferred stock with the relevant depositary and will cause the depositary to issue, on our behalf, the related depositary receipts. Subject to the terms of the deposit agreement, each owner of a depositary receipt will be entitled, in proportion to the fractional interest in the debt security or share of preferred stock represented by the related depositary share, to all the rights, preferences and privileges of, and will be subject to all of the limitations and restrictions on, the debt security or preferred stock represented by the depositary receipt (including, if applicable, dividend, voting, conversion, exchange, redemption, sinking fund, repayment at maturity, subscription and liquidation rights).

We may issue warrants to purchase debt securities, common stock, preferred stock, depositary shares, or any combination thereof, with or without the payment of separate consideration therefor (including by means of a dividend or similar distribution to holders of our outstanding securities). We may issue warrants independently or together with any other securities offered by a prospectus supplement. Warrants may be attached to or separate from such securities and may or may not be transferable. Each series of warrants will be issued under a separate warrant agreement we will enter into with a warrant agent specified in the applicable prospectus supplement. The warrant agent will act solely as our agent in connection with the warrants of a particular series and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants. In connection with any warrants, we may enter into a standby underwriting agreement with one or more underwriters pursuant to which the underwriters will agree to purchase any securities underlying such warrants that remain unpurchased upon the expiration of such warrants.

To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the warrants offered thereby, including the following:

We may issue subscription rights to purchase shares of our common stock or preferred stock. These subscription rights may be issued independently or together with any other security offered hereby and may or may not be transferable by the stockholder receiving the subscription rights in such offering. In connection with any offering of subscription rights, we may enter into a standby arrangement with one or more underwriters or other investors pursuant to which the underwriters or other investors may be required to purchase any securities remaining unsubscribed for after such offering.

To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the subscription rights offered thereby, including the following:

We may issue purchase contracts, including contracts obligating holders to purchase from us, and for us to sell to holders, a specific or varying number of debt securities, shares of our common stock or preferred stock, depositary shares, warrants, rights or other property or any combination of the above, at a future date or dates. Alternatively, the purchase contracts may obligate us to purchase from holders, and obligate holders to sell to us, a specific or varying number of debt securities, shares of our common stock or preferred stock, depositary shares, warrants, rights or other property. The price of such debt securities, shares of our common stock or preferred stock, depositary shares, warrants, rights or other property may be fixed at the time the purchase contracts are issued or may be determined by reference to a specific formula described in the purchase contracts. We may issue purchase contracts separately or as a part of units each consisting of a purchase contract and debt securities, preferred securities, warrants, rights or other obligations of third parties, including U.S. Treasury securities, securing their holder's obligations under the purchase contract. The purchase contracts may require us to make periodic payments to holders or vice versa and the payments may be unsecured or pre-funded on some basis. The purchase contracts may require holders to secure the holder's obligations in a specified manner that we will file with the SEC in connection with a public offering relating to the purchase contracts.

To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the purchase contracts offered thereby, including the following:

We may issue units comprising one or more securities described in this prospectus in any combination. Units may also include debt obligations of third parties, such as U.S. Treasury securities. Each unit may be issued so that the holder of the unit also is the holder of each security included in the unit. Thus, the unit may have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately at any time or at any time before a specified date.

To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the units offered thereby, including the following:

A summary of any material United States federal income tax consequences to persons investing in the securities offered by this prospectus may be set forth in an applicable prospectus supplement. Any such summary will be presented for informational purposes only, however, and will not be intended as legal or tax advice to prospective investors. Prospective investors of securities are urged to consult their own tax advisors prior to investing in the securities.

We may sell the offered securities (a) through agents, (b) to or through underwriters or dealers, (c) directly to one or more acquirers, or (d) through a combination of any of these methods of sale. We will identify the specific plan of distribution, including any underwriters, dealers, agents or direct acquirers and their compensation, in a prospectus supplement.

We may sell the offered securities directly to acquirers. 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 applicable 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 applicable 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 with respect to any sale of those securities. We will describe the terms of any sales of these securities in the applicable prospectus supplement.

If underwriters are used in the sale of the offered securities, we will execute an underwriting agreement with them regarding the securities. The underwriters will acquire the securities for their own account, subject to conditions in the underwriting agreement. 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 the 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 applicable prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to certain conditions and the underwriters will be obligated to purchase all the offered securities if they purchase any of them. 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. To the extent expressly set forth in the applicable prospectus supplement, these transactions may include over-allotment 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 the securities, we will sell the securities to them as principals. They may then resell the 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.

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

Unless otherwise specified in the prospectus supplement accompanying this prospectus, legal opinions relating to the securities being offered by this prospectus will be rendered by Michelle M. Warner, our Senior Vice President, General Counsel and Corporate Secretary. Ms. Warner beneficially owns an aggregate of less than one percent of the outstanding shares of our common stock. Certain legal matters will be passed upon for any underwriters or agents by counsel identified in the applicable prospectus supplement.

The consolidated financial statements and the related financial statement schedule incorporated in this prospectus by reference from USG Corporation's Annual Report on Form 10-K and the effectiveness of USG Corporation's internal control over financial reporting, have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports, which are incorporated herein by reference. Such consolidated financial statements and financial statement schedule have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements of USG Boral Building Products Pte. Limited for the period January 14, 2014 (date of incorporation) to June 30, 2014, incorporated in this prospectus by reference from USG Corporation's Annual Report on Form 10-K, have been audited by Deloitte PLT, independent auditors, as stated in their report, which is incorporated by reference. Such consolidated financial statements have been so incorporated, in reliance upon the report of such firm, given upon their authority as experts in accounting and auditing.

The consolidated financial statements of USG Boral Building Products Pty Limited for the year ended June 30, 2014 have been incorporated in this prospectus by reference from USG Corporation's Annual Report on Form 10-K, in reliance upon the report of KPMG, independent auditors, given upon their authority as experts in accounting and auditing.

The liability of KPMG, in relation to the performance of their professional services provided to USG Boral Building Products Pty Limited, including, without limitation, KPMG’s audit of USG Boral Building Products Pty Limited’s financial statements described above, is limited under the Institute of Chartered Accountants in Australia (NSW) Scheme approved by the New South Wales Professional Standards Council or such other applicable scheme approved pursuant to the Professional Standards Act of 1994 (NSW), including the Treasury Legislation Amendment (Professional Standards) Act. Specifically, the Accountants Scheme limits the liability of KPMG to a maximum amount of A$75 million. The Accountants Scheme does not limit liability for breach of trust, fraud or dishonesty. The Professional Standards Act and the Accountants Scheme have not been subject to relevant judicial consideration and, therefore, how the limitations will be applied by courts and the effect of the limitations on the enforcement of foreign judgments is untested.

INFORMATION NOT REQUIRED IN THE PROSPECTUS

The following is a statement of the estimated expenses to be incurred by USG Corporation in connection with the issuance and distribution of the securities registered under this registration statement, other than underwriting discounts, commissions and transfer taxes.

Registration fee under the Securities Act$ *
Printing and engraving$ **
Accounting and legal fees and expenses$ **
Rating agency fees$ **
Trustee's fees and expenses$ **
Miscellaneous, including traveling, telephone, copying, shipping and other out-of-pocket expenses$ **
Total$ **
*Deferred in reliance upon Rule 456(b) and Rule 457(r) under the Securities Act.**These fees and expenses are calculated based on the number of issuances and amount of securities offered and, accordingly, cannot be estimated at this time.

Section 145 of the DGCL gives Delaware corporations broad powers to indemnify their present and former directors and officers and those of affiliated corporations against expenses incurred in the defense of any lawsuit to which they are made parties by reason of being or having been such directors or officers, subject to specified conditions and exclusions. Section 145 of the DGCL also gives a director or officer who successfully defends an action the right to be so indemnified and authorizes the corporation to buy directors' and officers' liability insurance. Such indemnification is not exclusive of any other right to which those indemnified may be entitled under any by-law, agreement, vote of stockholders or otherwise.

Article VII of the registrant's By-Laws provides that the registrant (a) shall indemnify every person who is or was a director or officer of the registrant or is or was serving at the registrant's request as a director or officer of another corporation, partnership, joint venture, trust or other enterprise and (b) shall, if the board of directors so directs, indemnify any person who is or was an employee or agent of the registrant or is or was serving at the registrant's request as an employee or agent of another corporation, partnership, joint venture, trust or other enterprise, to the extent, in the manner and subject to compliance with the applicable standards of conduct, provided by Section 145 of the DGCL as the same (or any substitute provision therefor) may be in effect from time to time. Any such indemnification shall 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.

The registrant has procured insurance for the purpose of substantially covering its future potential liability for indemnification under Section 145 of the DGCL as discussed above and certain future potential liability of individual directors or officers incurred in their capacity as such that is not subject to indemnification.

The registrant has entered into Indemnification Agreements with each of its directors and officers. The Indemnification Agreements provide that the registrant shall indemnify and keep indemnified the indemnitee to the fullest extent authorized by Section 145 of the DGCL as it may be in effect from time to time from and against any expenses (including expenses of investigation and preparation and reasonable fees and disbursements of legal counsel, accountants and other experts), judgments, fines and amounts paid in settlement by the indemnitee in connection with any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, and whether or not the cause of action, suit or proceeding incurred before or after the date of the Indemnification Agreements. The Indemnification Agreements further provide for advancement of amounts to cover expenses incurred by the indemnitee in defending any such action, suit or proceeding subject to an undertaking by the indemnitee to repay any expenses advanced that it is later determined he or she was not entitled to receive.

Article Eleventh of the registrant's Restated Certificate of Incorporation eliminates the personal liability of the registrant's directors to the registrant or its stockholders for monetary damages for breach of fiduciary duty as a director, except (a) for any breach of the director's duty of loyalty to the registrant or its stockholders, (b) for acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law, (c) under Section 174 of the DGCL (which addresses director liability for unlawful payment of a dividend or unlawful stock purchase or redemption) or (d) for any transaction from which the director derived an improper personal benefit.

The information in the Exhibit Index of this registration statement is incorporated into this Item 16 by reference.

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

(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) if, in the aggregate, the changes in volume and price represent no more than 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 (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) do not apply if the registration statement is on Form S-3 and the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is 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.

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

deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was 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 the 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, the 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 the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

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

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

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

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

(c) The undersigned registrant hereby undertakes, if applicable, to supplement the prospectus, after the expiration of the subscription period, to set forth the results of the subscription offer, the transactions by the underwriters during the subscription period, the amount of unsubscribed securities to be purchased by the underwriters, and the terms of any subsequent reoffering thereof. If any public offering by the underwriters is to be made on terms differing from those set forth on the cover page of the prospectus, a post-effective amendment will be filed to set forth the terms of such offering.

(d) 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 foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the 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 it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

(e) The undersigned registrant hereby undertakes to file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the SEC under Section 305(b)(2) of the Trust Indenture Act.

Exhibit NumberDescription of Document
1.1*Form of underwriting or purchase agreement.
2.1**Share Sale and Subscription Agreement, dated as of October 17, 2013, by and among USG Corporation, USG Netherlands Global Holdings B.V., Boral Limited, Boral International Pty Limited, and Boral Gypsum Asia Sdn Bhd (incorporated by reference to Exhibit 2.1 to USG Corporation's Current Report on Form 8-K (File No. 001-08864) dated October 16, 2013).
2.2**Share Sale and Subscription Agreement, dated as of October 17, 2013, by and among USG Corporation, USG Foreign Investments, Ltd., USG Netherlands Global Holdings B.V., Boral Limited, Boral Building Materials Pty Limited, and Boral Australian Gypsum Limited (incorporated by reference to Exhibit 2.2 to USG Corporation's Current Report on Form 8-K (File No. 001-08864) dated October 16, 2013).
2.3**Sale and Purchase Agreement, by and between USG Corporation and American Builders & Contractors Supply Co., Inc., dated August 27, 2016 (incorporated by reference to Exhibit 2.1 to USG Corporation's Amendment No. 1 to Current Report on Form 8-K (File No. 001-08864) dated August 29, 2016).
3.1Restated Certificate of Incorporation of USG Corporation (incorporated by reference to Exhibit 3.1 to USG Corporation’s Current Report on Form 8-K (File No. 001-08864) dated November 14, 2017).
3.2Amended and Restated By-Laws of USG Corporation, dated as of November 9, 2017 (incorporated by reference to Exhibit 3.2 to USG Corporation’s Current Report on Form 8-K (File No. 001-08864) dated November 14, 2017).
4.1Form of Common Stock certificate (incorporated by reference to Exhibit 4.1 to USG Corporation’s Current Report on Form 8-K (File No. 001-08864) dated May 12, 2016).
4.2Rights Agreement, dated as of December 21, 2006, by and between USG Corporation and Computershare Investor Services, LLC, as Rights Agent (incorporated by reference to Exhibit 4.1 to USG Corporation’s Registration Statement on Form 8-A (File No. 001-08864) dated December 21, 2006).
4.3Amendment No. 1 to Rights Agreement, dated as of December 5, 2008, by and between USG Corporation and Computershare Investor Services, LLC, as Rights Agent (incorporated by reference to Exhibit 4.1 to USG Corporation’s Amendment No. 1 to Form 8-A (File No. 001-08864) dated December 5, 2008).
4.4Amendment No. 2 to Rights Agreement, dated as of March 22, 2013, by and between USG Corporation and Computershare Trust Company, N.A., as Rights Agent (successor-in-interest to Computershare Investor Services, LLC) (incorporated by reference to Exhibit 4.1 to USG Corporation’s Amendment No. 2 to Form 8-A (File No. 001-08864) dated March 22, 2013).
4.5Amendment No. 3 to Rights Agreement, dated as of February 11, 2015, by and between USG Corporation and Computershare Trust Company, N.A., as Rights Agent (successor-in-interest to Computershare Investor Services, LLC) (incorporated by reference to Exhibit 4.1 to USG Corporation’s Amendment No. 3 to Form 8-A (File No. 001-08864) dated February 11, 2015).
4.6Amendment No. 4 to Rights Agreement, dated as of November 16, 2015, by and between USG Corporation and Computershare Trust Company, N.A., as Rights Agent (successor-in-interest to Computershare Investor Services, LLC) (incorporated by reference to Exhibit 4.1 to USG Corporation’s Amendment No. 4 to Form 8-A (File No. 001-08864) dated November 16, 2015).
4.7Indenture, dated as of November 1, 2006, by and between USG Corporation and U.S. Bank National Association, as successor trustee (the “2006 Indenture”) (incorporated by reference to Exhibit 4.01 to USG Corporation's Current Report on Form 8-K (File No. 001-08864) dated November 20, 2006).
4.8Agreement of Resignation, Appointment and Acceptance, dated as of October 18, 2011, by and among USG Corporation, U.S. Bank National Association and HSBC Bank USA, National Association (incorporated by reference to Exhibit 4.1 to USG Corporation's Quarterly Report on Form 10-Q (File No. 001-08864) dated October 31, 2011).
4.9Supplemental Indenture No. 6, dated as of February 24, 2015, by and among USG Corporation, each of United States Gypsum Company, L&W Supply Corporation, USG Foreign Investments, Ltd. and USG Interiors, LLC, as guarantors, and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 4.1 to USG Corporation’s Current Report on Form 8-K (File No. 001-08864) dated February 24, 2015).
4.10Supplemental Indenture No. 7, dated as of May 15, 2017, by and among USG Corporation, each of United States Gypsum Company, USG Foreign Investments, Ltd. and USG Interiors, LLC, as guarantors, and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 4.1 to USG Corporation's Current Report on Form 8-K (File No. 001-08864) dated May 15, 2017).
4.11*Form of Supplemental Indenture to the 2006 Indenture.
4.12*Form of Certificate of Designation of Preferred Stock.
4.13*Form of Depositary Agreement.
4.14*Form of Warrant.
4.15*Form of Rights Certificate.
4.16*Form of Purchase Rights Agreement.
4.17*Form of Purchase Contract.
4.18*Form of Unit.
5.1†Opinion of Michelle M. Warner, Senior Vice President, General Counsel and Corporate Secretary of USG Corporation.
12.1†Computation of Ratio of Earnings to Fixed Charges.
23.1†Consent of Independent Registered Public Accounting Firm, Deloitte & Touche LLP.
23.2†Consent of Independent Auditors, Deloitte PLT.
23.3†Consent of Independent Auditors, KPMG.
23.4†Consent of Michelle M. Warner, Senior Vice President, General Counsel and Corporate Secretary of USG Corporation (included in Exhibit 5.1).
24.1†Powers of Attorney.
25.1***Form T-1 Statement of Eligibility of U.S. Bank National Association, as Trustee with respect to the Indenture.
† Filed herewith.
* To be filed by an amendment or as an exhibit to a report filed under the Exchange Act and incorporated by reference herein.** Schedules and other similar attachments have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The registrant hereby undertakes to furnish supplementally copies of any of the omitted schedules and other similar attachments upon request by the SEC, provided that the registrant may request confidential treatment for any schedule or other similar attachment so furnished.*** To be filed pursuant to Section 305(b)(2) of the Trust Indenture Act of 1939.

Pursuant to the requirements of the Securities Act, 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 Chicago, State of Illinois, on November 29, 2017.

USG CORPORATION
By:/s/ Matthew F. Hilzinger
Matthew F. Hilzinger
Executive Vice President and
Chief Financial Officer

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

SignatureTitleDate
/s/ Jennifer F. ScanlonDirector, President and Chief Executive OfficerNovember 29, 2017
Jennifer F. Scanlon(Principal Executive Officer)
/s/ Matthew F. HilzingerExecutive Vice President and Chief Financial OfficerNovember 29, 2017
Matthew F. Hilzinger(Principal Financial Officer)
/s/ Jeanette A. PressVice President and ControllerNovember 29, 2017
Jeanette A. Press(Principal Accounting Officer)
*DirectorNovember 29, 2017
Jose Armario
*DirectorNovember 29, 2017
Thomas A. Burke
*DirectorNovember 29, 2017
Matthew Carter, Jr.
*DirectorNovember 29, 2017
Gretchen R. Haggerty
*DirectorNovember 29, 2017
William H. Hernandez
*DirectorNovember 29, 2017
Brian A. Kenney
*DirectorNovember 29, 2017
Richard P. Lavin
*Non-Executive Chairman of the BoardNovember 29, 2017
Steven F. Leer
*The undersigned by signing his name hereunto has hereby signed this registration statement on behalf of the above-named directors pursuant to a power of attorney executed on behalf of each such director and filed with the SEC as Exhibit 24.1 hereto.

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