Document:

EX-4.1

 Exhibit 4.1 

AUTODESK, INC. 
 as Issuer 

and 
 U.S. BANK NATIONAL
ASSOCIATION, 
 as Trustee 

THIRD SUPPLEMENTAL INDENTURE 

Dated as of June 8, 2017. 

$500,000,000 of 3.500% Notes due 2027 

 THIS THIRD SUPPLEMENTAL INDENTURE (the “Third Supplemental Indenture”) is dated
as of June 8, 2017 between AUTODESK, INC., a Delaware corporation (the “Company”), and U.S. Bank National Association, a national banking association (the “Trustee”). 

RECITALS 
 A. The Company and the
Trustee executed and delivered an Indenture, dated as of December 13, 2012 (the “Base Indenture” and, as supplemented by the Third Supplemental Indenture, the “Indenture”), to provide for the issuance by the
Company from time to time of senior debt securities evidencing its unsecured indebtedness. 
 B. Pursuant to Board Resolutions and an
Officer’s Certificate, the Company has authorized the issuance of $500,000,000 aggregate principal amount of 3.500% Notes due 2027 (the “Notes”). 

C. The entry into this Third Supplemental Indenture by the parties hereto is in all respects authorized by the provisions of the Base
Indenture. 
 D. The Company desires to enter into this Third Supplemental Indenture pursuant to Section 9.01 of the Base Indenture to
establish the terms of the Notes in accordance with Section 2.01 of the Base Indenture and to establish the form of the Notes in accordance with Sections 2.01(a)(10) and 2.02 of the Base Indenture. 

E. All things necessary to make this Third Supplemental Indenture a valid and legally binding agreement according to its terms have been done.

 NOW, THEREFORE, for and in consideration of the foregoing premises, the Company and the Trustee mutually covenant and agree for the equal
and proportionate benefit of the respective Holders from time to time of the Notes as follows: 
 ARTICLE I 

Section 1.1 Terms of the Notes. 
 The
following terms relate to the Notes: 
 (1) The Notes shall constitute a series of Notes having the title “3.500% Notes due 2027.”

 (2) The aggregate principal amount of the Notes that may be initially authenticated and delivered under the Indenture shall be
$500,000,000 (the “Initial Notes”). The Company may from time to time, without the consent of the Holders of Notes, issue additional Notes (in any such case, the “Additional Notes”) having the same ranking and the
same interest rate, maturity and other terms as the Initial Notes. Any Additional Notes and the Initial Notes shall each constitute a single series under the Indenture and all references to the Notes shall include the Initial Notes and any
Additional Notes, unless the context otherwise requires; provided that if such Additional Notes are not fungible with the Initial Notes, for U.S. federal income tax purposes, the applicable Additional Notes will have a separate CUSIP number. The
aggregate principal amount of each of the Additional Notes shall be unlimited. 
 (3) The entire Outstanding principal of the Notes shall be
payable on June 15, 2027. 
 (4) The rate at which the Notes shall bear interest shall be 3.500% per year. The date from which
interest shall accrue on the Notes shall be the most recent Interest Payment Date to which interest has been paid or provided for or, if no interest has been paid, from June 8, 2017. The Interest Payment Dates for the Notes shall be
June 15 and December 15 of each year, beginning December 15, 2017. Interest shall be payable on each Interest Payment Date to the Holders of record at the close of business on the June 1 and December 1 prior to each Interest
Payment Date (in connection with the Notes, a “regular record date”). The basis upon which interest shall be calculated shall be that of a 360-day year consisting of twelve 30-day months. All dollar amounts resulting from the
calculation of interest shall be rounded to the nearest cent. 
 (5) The Notes shall be issuable in whole in the form of one or more
registered Global Securities, and the Depository for such Global Securities shall be The Depository Trust Company, New York, New York. The Notes shall be substantially in the form attached hereto as Exhibit A, the terms of which are herein
incorporated by reference. The Notes shall be issuable in denominations of $2,000 or any integral multiple of $1,000 in excess thereof. 

(6) The Notes may be redeemed at the option of the Company prior to the Stated Maturity, as provided in Section 1.3 of this Third
Supplemental Indenture. 
 (7) The Notes will not have the benefit of any sinking fund. 

(8) Except as provided herein, the Holders of the Notes shall have no special rights in addition to those provided in the Base Indenture upon
the occurrence of any particular events. 

  
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 (9) The Notes will be senior unsecured obligations of the Company and will rank equal in right of
payment to all of the Company’s other existing and future senior unsecured indebtedness and among themselves. 
 (10) The Notes are not
convertible into shares of common stock or other securities of the Company. 
 (11) The restrictive covenants set forth in Section 1.5
hereof shall be applicable to the Notes. 
 Section 1.2 Additional Defined Terms. 

As used herein, the following defined terms shall have the following meanings with respect to the Notes only: 

“Attributable Debt” means, with respect to any sale and leaseback transaction, at the time of determination, the lesser of
(1) fair market value of such Principal Property as determined in good faith by the Board of Directors, and (2) the total obligation (discounted to the present value at the implicit interest factor, determined in accordance with U.S. GAAP,
included in the rental payments) of the lessee for rental payments (other than amounts required to be paid on account of property taxes as well as maintenance, repairs, insurance, water rates and other items which do not constitute payments for
property rights) during the remaining portion of the base term of the lease included in such transaction. 
 “Change of
Control” means the occurrence of any of the following: (1) the direct or indirect sale, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or
substantially all of the properties or assets of the Company and its Subsidiaries taken as a whole to any “person” (as that term is used in Section 13(d)(3) of the Exchange Act) other than to the Company or one of its Subsidiaries;
(2) the adoption of a plan by the Board of Directors of the Company relating to the Company’s liquidation or dissolution; (3) the consummation of any transaction (including, without limitation, any merger or consolidation) the result
of which is that any “person” (as defined above) becomes the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, of more than 50% of the aggregate of the total voting power of
the Voting Stock of the Company or other Voting Stock into which the Company’s Voting Stock is reclassified, consolidated, exchanged or changed, measured by voting power rather than number of shares; provided, however, that a person shall not
be deemed beneficial owner of, or to own beneficially, (A) any securities tendered pursuant to a tender or exchange offer made by or on behalf of such person or any of such person’s Affiliates until such tendered securities are accepted
for purchase or exchange thereunder, or (B) any securities if such beneficial ownership (i) arises solely as a result of a revocable proxy delivered in response to a proxy or consent solicitation made pursuant to the applicable rules and
regulations under the Exchange Act, and (ii) is not also then reportable on Schedule 13D (or any successor schedule) under the Exchange Act; or (4) the Company consolidates with, or merges with or into, any “person” (as defined
above), or any “person” (as defined above) consolidates with, or merges with or into, the Company, in any such event pursuant to a transaction in which any of the outstanding Voting Stock of the Company or the outstanding Voting Stock of
such other “person” (as defined above) is converted into or exchanged for cash, securities or other property, other than any such transaction where the shares of the Company’s Voting Stock outstanding immediately prior to such
transaction constitute, or are converted into or exchanged for, a majority of the Voting Stock of the surviving “person” (as defined above) or any direct or indirect parent company of any surviving “person” (as defined above)
immediately after giving effect to such transaction. 
 Notwithstanding the foregoing, a transaction will not be deemed to involve a Change
of Control if (a) the Company becomes a direct or indirect wholly owned Subsidiary of a holding company and (b) (i) the holders of the Voting Stock of such holding company immediately following that transaction are substantially the
same as the holders of the Company’s Voting Stock immediately prior to that transaction or (ii) no “person” (as defined above) (other than a holding company satisfying the requirements of this sentence) becomes the
“beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, of more than 50% of the voting power of the Voting Stock of such holding company immediately following such transaction. 

“Change of Control Repurchase Event” means the occurrence of both a Change of Control and a Ratings Event. 

“Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker as having
an actual or interpolated maturity comparable to the remaining term of the applicable Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt
securities of comparable maturity to the remaining term of such Notes. 
 “Comparable Treasury Price” means,
with respect to any Optional Redemption Date, (1) the arithmetic average of the applicable Reference Treasury Dealer Quotations for such Optional Redemption Date after excluding the highest and lowest Reference Treasury Dealer Quotations,
(2) if the Company obtains fewer than four applicable Reference Treasury Dealer Quotations, the arithmetic average of all applicable Reference Treasury Dealer Quotations for such Optional Redemption Date, or (3) if only one Reference
Treasury Dealer Quotation is received, such quotation. 
 “Consolidated Net Tangible Assets” means, as of the time of
determination, the aggregate amount of the assets of the Company and the assets of its consolidated Subsidiaries after deducting (1) all goodwill, trade names, trademarks, service marks, patents, unamortized debt discount and expense and other
intangible assets and (2) all current liabilities, as reflected on the most recent consolidated balance sheet prepared by the Company in accordance with U.S. GAAP contained in an Annual Report on Form 10-K or a Quarterly Report on Form 10-Q
filed or any amendment thereto (and not subsequently disclaimed as not being reliable by the Company) pursuant to the Exchange Act by the Company prior to the time as of which Consolidated Net Tangible Assets is being determined, or, if the Company
is not required to so file, as reflected on its most recent consolidated balance sheet prepared by the Company in accordance with U.S. GAAP. 

  
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 “guarantee” means any obligation, contingent or otherwise, of any Person
directly or indirectly guaranteeing any indebtedness of any other Person and any obligation, direct or indirect, contingent or otherwise, of such Person (1) to purchase or pay (or advance or supply funds for the purchase or payment of) such
indebtedness of such other Person (whether arising by virtue of partnership arrangements, or by agreement to keep well, to purchase assets, goods, securities or services, to take or pay or to maintain financial statement conditions or otherwise) or
(2) entered into for purposes of assuring in any other manner the obligee of such indebtedness of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part); provided, however, that the term
“guarantee” will not include endorsements for collection or deposit in the ordinary course of business. The term “guarantee,” when used as a verb, has a correlative meaning. 

“incur” means issue, assume, guarantee or otherwise become liable for. 

“Independent Investment Banker” means one of the Reference Treasury Dealers, or their respective successors, as may be
appointed from time to time by the Company; provided, however, that if the foregoing ceases to be a primary U.S. Government securities dealer in the United States (a “primary treasury dealer”), the Company will substitute another
primary treasury dealer. 
 “indebtedness” means, with respect to any Person, any indebtedness of such Person for borrowed
money (including, without limitation, indebtedness for borrowed money evidenced by notes, bonds, debentures or similar instruments). 

“Investment Grade” means a rating of Baa3 or better by Moody’s (or its equivalent under any successor Rating Categories
of Moody’s); a rating of BBB– or better by S&P (or its equivalent under any successor Rating Categories of S&P); or, if applicable, the equivalent investment grade credit rating from any Substitute Rating Agency. 

“Lien” means any mortgage, security interest, pledge, lien, charge, or other similar encumbrance. 

“Moody’s” means Moody’s Investors Service, Inc. 

“Non-recourse Obligation” means indebtedness or other obligations substantially related to (1) the acquisition of assets
not previously owned by the Company or any direct or indirect Subsidiaries of the Company or (2) the financing of a project involving the development or expansion of properties of the Company or any direct or indirect Subsidiaries of the
Company, as to which the obligee with respect to such indebtedness or obligation has no recourse to the Company or any direct or indirect Subsidiary of the Company or such Subsidiary’s assets other than the assets which were acquired with the
proceeds of such transaction or the project financed with the proceeds of such transaction (and the proceeds thereof). 
 “Optional
Redemption Date” when used with respect to any Note to be redeemed at the Company’s option, means the date fixed for such redemption by or pursuant to Section 1.3 of this Third Supplemental Indenture. 

“Optional Redemption Price” when used with respect to any Note to be redeemed at the Company’s option, means the price
at which it is to be redeemed pursuant to Section 1.3 of this Third Supplemental Indenture. 
 “Permitted Liens” has
the meaning set forth in Section 1.5 hereto. 
 “Principal Property” means the land, improvements, buildings and
fixtures owned by the Company or any of its wholly-owned domestic Subsidiaries that constitutes the Company’s principal offices in San Rafael, California, any research and development facility and any service and support facility (in each case
including associated office facilities) located within the territorial limits of the States of the United States of America, except such as the Board of Directors by resolution determines in good faith (taking into account, among other things, the
importance of such property to the business, financial condition and earnings of the Company and its Subsidiaries taken as a whole) not to be of material importance to the Company’s and its Subsidiaries’ business, taken as a whole. 

“Rating Agency” means (1) each of Moody’s and S&P; and (2) if either of Moody’s or S&P ceases to
rate the Notes or fails to make a rating of the Notes publicly available for reasons outside of the control of the Company, a Substitute Rating Agency. 

“Rating Category” means (i) with respect to S&P, any of the following categories: BBB, BB, B, CCC, CC, C and D (or
equivalent successor categories); (ii) with respect to Moody’s, any of the following categories: Baa, Ba, B, Caa, Ca, C and D (or equivalent successor categories); and (iii) the equivalent of any such category of S&P or
Moody’s used by another Rating Agency. In determining whether the rating of the Notes has decreased by one or more gradations, gradations within Rating Categories (+ and – for S&P; 1, 2 and 3 for Moody’s; or the equivalent
gradations for another Rating Agency) shall be taken into account (e.g., with respect to S&P, a decline in a rating from BB+ to BB, as well as from BB– to B+, will constitute a decrease of one gradation). 

“Ratings Event” means that the Notes cease to be rated Investment Grade by both Rating Agencies on any day during the period
(the “Trigger Period”) commencing on the earlier of (a) the first public notice of the occurrence of a Change of Control or (b) the public announcement by the Company of its intention to effect a Change of Control, and
ending 60 days following consummation of such Change of Control (which period shall be extended so long as the rating of the Notes is under publicly announced consideration for a possible rating downgrade by either of the Rating Agencies on such 60th day, such extension to last with respect to each such Rating Agency until the date on which such Rating Agency considering such possible downgrade either (x) rates the Notes below Investment
Grade or (y) publicly announces that it is no longer considering the Notes for possible downgrade, provided that no such extension will occur if on such 60th day the Notes are rated
Investment Grade by at least one of such Rating Agencies in question and are not subject to review for possible downgrade by such Rating Agency). If either Rating Agency is not providing a rating of the Notes on any day during the Trigger Period for
any reason, the rating of such Rating Agency shall be deemed to have ceased to be rated Investment Grade during the Trigger Period. 

  
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 “Reference Treasury Dealer” means each of Citigroup Global Markets Inc.; Morgan
Stanley & Co. LLC and two other primary treasury dealers selected by the Company, and each of their respective successors and any other primary treasury dealers selected by the Company. 

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any Optional Redemption
Date, the arithmetic average, as determined by the Company, of the bid and asked prices for the applicable Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such Reference
Treasury Dealer as of 3:30 p.m., New York City time, on the third Business Day preceding such Optional Redemption Date. 

“Remaining Scheduled Payments” means, with respect to any Note to be redeemed, the remaining scheduled payments of the
principal thereof and interest thereon that would be due after the related Optional Redemption Date but for such redemption; provided, however, that, if such Optional Redemption Date is not an Interest Payment Date with respect to such Note, the
amount of the next scheduled interest payment thereon will be reduced by the amount of interest accrued thereon to such Optional Redemption Date. 

“Restricted Subsidiary” means any domestic Subsidiary that owns any Principal Property other than (1) any Subsidiary
primarily engaged in financing receivables or in the finance business, or (2) any of the Company’s less than 80%-owned Subsidiaries if the common stock of such Subsidiary is traded on any national securities exchange or on the
over-the-counter markets. 
 “Sale and Leaseback Transaction” means any arrangement with any Person providing for the
leasing by the Company or any Subsidiary of the Company of any Principal Property which has been or is to be sold or transferred by the Company or such Subsidiary to such Person, excluding (1) leases for a term, including renewals at the option
of the lessee, of not more than three years, and (2) leases between the Company and a Subsidiary or between Subsidiaries of the Company. 

“Subsidiary” means, with respect to any Person (the “Parent”) at any date, any corporation, limited
liability company, partnership, association or other entity the accounts of which would be consolidated with those of the Parent in the Parent’s consolidated financial statements if such financial statements were prepared in accordance with
U.S. GAAP as of that date, as well as any other corporation, limited liability company, partnership, association or other entity of which securities or other ownership interests representing more than 50% of the equity or more than 50% of the
ordinary voting power or, in the case of a partnership, more than 50% of the general partnership interests are, as of that date, owned, controlled or held by the Parent or one or more Subsidiaries of the Parent or by the Parent and one or more
Subsidiaries of the Parent. 
 “Substitute Rating Agency” means a “nationally recognized statistical rating
organization” within the meaning of Section 3(a)(62) of the Exchange Act, selected by the Company (as certified by a resolution of the Board of Directors) as a replacement agency for Moody’s or S&P, or both of them, as the case
may be. 
 “S&P” means Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc.

 “Treasury Rate” means, with respect to any Optional Redemption Date, the rate per annum equal to the semi-annual
equivalent yield to maturity (computed as of the third Business Day immediately preceding that Optional Redemption Date) of the applicable Comparable Treasury Issue. In determining this rate, the Company will assume a price for the applicable
Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for such Optional Redemption Date. 

“Voting Stock” of any specified “person” (as that term is used in Section 13(d)(3) of the Exchange Act) as of
any date means the Capital Stock of such person that is at the time entitled to vote generally in the election of the board of directors of such person. 

Section 1.3 Optional Redemption. 

(a) The provisions of Article III of the Base Indenture, as amended by the provisions of this Third Supplemental Indenture, shall apply to the
Notes with respect to this Section 1.3. 
 (b) The Notes shall be redeemable in whole at any time or in part from time to time, at the
Company’s option. Upon redemption of the Notes prior to March 15, 2027, the Company shall pay an Optional Redemption Price equal to the greater of: 

(i) 100% of the aggregate principal amount of the Notes to be redeemed, and 

(ii) the sum of the present values of the Remaining Scheduled Payments of the Notes to be redeemed, discounted to the Optional Redemption
Date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) using a discount rate equal to the Treasury Rate plus 20 basis points, 

plus, in addition to such Optional Redemption Price accrued and unpaid interest thereon to, but excluding, the Optional Redemption Date. 

Upon redemption of the Notes on or after March 15, 2027, the Company shall pay an Optional Redemption Price equal to 100% of the
aggregate principal amount of the Notes being redeemed plus accrued and unpaid interest thereon to, but excluding, the Optional Redemption Date. 

Notwithstanding the foregoing, installments of interest whose Stated Maturity is on or prior to the Optional Redemption Date shall be payable
on the applicable Interest Payment Date to the Securityholders of such Notes registered as such at the close of business on the applicable record date pursuant to the Notes and the Indenture. 

  
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 (c) On and after the Optional Redemption Date for the Notes, interest shall cease to accrue on
the Notes or any portion thereof called for redemption, unless the Company defaults in the payment of the Optional Redemption Price and accrued interest, if any. On or before 12:00 p.m., New York City time, on the Optional Redemption Date for the
Notes, the Company shall deposit with the Trustee or a paying agent, funds sufficient to pay the Optional Redemption Price of the Notes to be redeemed on the Optional Redemption Date, and (except if the date fixed for redemption shall be an Interest
Payment Date) accrued interest, if any. If less than all of the Notes are to be redeemed, the Notes shall be redeemed in accordance with Section 3.02 of the Base Indenture. 

(d) Notice of any redemption shall be delivered at least 30 days but not more than 60 days before the Optional Redemption Date to each Holder
of the Notes to be redeemed; provided, however, that the Company shall notify the Trustee of the Optional Redemption Date at least 5 days prior to the date of the giving of such notice (unless a shorter notice shall be satisfactory to the Trustee).
Such notice shall be provided in accordance with Section 3.02 of the Base Indenture. If the Optional Redemption Price cannot be determined at the time such notice is to be given, the actual Optional Redemption Price, calculated as described
above in clause (b), shall be set forth in an Officer’s Certificate of the Company delivered to the Trustee no later than two (2) Business Days prior to the Optional Redemption Date. Notice of redemption having been given as provided in
the Indenture, the Notes called for redemption shall, on the Optional Redemption Date, become due and payable at the Optional Redemption Price, and accrued and unpaid interest, if any, to, but excluding, the Optional Redemption Date. 

Section 1.4 Change of Control Repurchase Event.

(a) If a Change of Control Repurchase Event occurs with respect to the Notes, unless the Company shall have exercised its right to redeem the
Notes in full, as set forth in Section 1.3 of this Third Supplemental Indenture or the Company shall have defeased the Notes or have satisfied and discharged the Notes, as set forth in Article XI of the Base Indenture, each Holder of the Notes
shall have the right (a “Change of Control Right”) to require the Company to repurchase all or any part of such Holder’s Notes at a repurchase price in cash equal to 101% of the aggregate principal amount of the Notes to be
repurchased (such principal amount to be equal to $2,000 or an integral multiple of $1,000 in excess of $2,000), plus accrued and unpaid interest, if any, on the Notes to be repurchased up to, but excluding, the date of repurchase (the
“Change of Control Payment”). Within 30 days following any Change of Control Repurchase Event, or at the option of the Company, prior to any Change of Control, but after the public announcement of the Change of Control or event that
may constitute the Change of Control, the Company shall deliver a notice (a “Change of Control Notice”) to each Holder of the Notes, with a copy to the Trustee, describing the transaction or transactions that constitute or may
constitute the Change of Control Repurchase Event and the Company’s obligation to repurchase the Notes on the date specified in the notice, which date will be no earlier than 30 days and no later than 60 days from the date such notice is
delivered (the “Change of Control Payment Date”). The Change of Control Notice shall, if delivered prior to the date of the consummation of the Change of Control, state that the Company’s obligation to repurchase the Notes is
conditioned on a Change of Control Repurchase Event occurring on or prior to the Change of Control Payment Date. Holders of Definitive Securities electing to have a Note repurchased pursuant to this Section 1.4 will be required to surrender the
Notes, with the form entitled “Option of Holder to Elect Purchase” on the reverse of the Note completed, to the paying agent at the address specified in the notice, or Holders of Global Securities must transfer their Notes to the paying
agent by book-entry transfer pursuant to the Applicable Procedures of the paying agent, prior to the close of business on the Business Day prior to the Change of Control Payment Date. 

Notwithstanding the foregoing, installments of interest whose Stated Maturity is on or prior to the Change of Control Payment Date shall be payable on the
applicable Interest Payment Date to the Securityholders of such Notes registered as such at the close of business on the applicable record date pursuant to the Notes and the Indenture. 

(b) On the Change of Control Payment Date, the Company shall, to the extent lawful: 

(i) accept for payment all Notes or portions of Notes properly tendered pursuant to the Change of Control Notice; 

(ii) deposit with the paying agent an amount equal to the Change of Control Payment in respect of all Notes or portions of Notes properly
tendered; and 
 (iii) deliver or cause to be delivered to the Trustee the Notes properly accepted, together with an Officer’s
Certificate stating the aggregate principal amount of Notes being repurchased by the Company. 
 (c) The Company will not be obligated to
repurchase the Notes pursuant to this Section 1.4 if a third party agrees to repurchase the Notes in the manner, at the times required and otherwise in compliance with the requirements for the Company under this Indenture, and such third party
repurchases all Notes properly tendered and not withdrawn by the Holders. 
 (d) The Company will comply with the requirements of Rule 14e-1
under the Exchange Act and any other securities laws and regulations thereunder to the extent such laws and regulations are applicable in connection with the repurchase of the Notes as a result of a Change of Control Repurchase Event. To the extent
that the provisions of any such securities laws or regulations conflict with this Section 1.4, the Company shall comply with the applicable securities laws and regulations and shall not be deemed to have breached its obligations under this
Section 1.4 by virtue of any such conflict. 
 Section 1.5 Additional Covenants. 

The following additional covenants shall apply with respect to the Notes so long as any of the Notes remain Outstanding: 

(a) Limitation on Liens. 

  
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 The Company will not incur, and will not permit any of its Restricted Subsidiaries to incur, any
indebtedness secured by a Lien on any Principal Property of the Company or any of its Restricted Subsidiaries or upon shares of stock or indebtedness of any Restricted Subsidiary (whether such Principal Property, or shares of stock or indebtedness
of any Restricted Subsidiary, are now existing or owned or hereafter created or acquired), in each case, unless prior to or at the same time the Company or such Restricted Subsidiary also secures all payments due under the Notes having the benefit
of this Section (together with, if the Company shall so determine, any other indebtedness or guarantees of the Company or any Subsidiary of the Company ranking equally with the Notes or such guarantee), on an equal and ratable basis with, or at the
option of the Company, prior to, such other indebtedness so secured for so long as such other indebtedness shall be so secured. 
 The
foregoing prohibition shall not apply to any of the following Liens (“Permitted Liens”): 
 (1) Liens on property, shares
of stock or indebtedness existing with respect to any Person at the time such Person becomes a Subsidiary of the Company or a Subsidiary of any Subsidiary of the Company, provided that such Lien was not incurred in anticipation of such Person
becoming a Subsidiary; 
 (2) Liens on property, shares of stock or indebtedness existing at the time of acquisition by the Company or any
of its Subsidiaries or a Subsidiary of any Subsidiary of the Company of such property, shares of stock or indebtedness or Liens on property, shares of stock or indebtedness to secure the payment of all or any part of the purchase price of such
property, shares of stock or indebtedness, or Liens on property, shares of stock or indebtedness to secure any indebtedness for borrowed money incurred prior to, at the time of, or within 18 months after, the latest of the acquisition of such
property, shares of stock or indebtedness or, in the case of property, the completion of construction, the completion of improvements or the commencement of substantial commercial operation of such property for the purpose of financing all or any
part of the purchase price of the property and related costs and expenses, the construction or the making of the improvements; 
 (3) any
Lien securing indebtedness of the Company or a Subsidiary of the Company owing to the Company or to any of its Subsidiaries; 
 (4) Liens
existing on the date when the Company first issues Notes pursuant to this Indenture (other than any Additional Notes); 
 (5) Liens on
property or assets of a Person existing at the time such Person is merged into or consolidated with the Company or any of its Subsidiaries, at the time such Person becomes a Subsidiary of the Company, or at the time of a sale, lease or other
disposition of all or substantially all of the properties or assets of a Person to the Company or any of its Subsidiaries, provided that such Lien was not incurred in anticipation of the merger, consolidation or sale, lease, other disposition or
other such transaction; 
 (6) Liens created in connection with a project financed with, and created to secure, a Non-recourse Obligation;

 (7) Liens created to secure the Notes; 

(8) Liens imposed by law, such as materialmen’s, workmen’s or repairmen’s, carriers’, warehousemen’s and
mechanic’s Liens or other similar Liens, in each case for sums not yet overdue by more than 30 calendar days or being contested in good faith by appropriate proceedings or other Liens arising out of judgments or awards against such Person with
respect to which such Person shall then be proceeding with an appeal or other proceedings for review and Liens arising solely by virtue of any statutory or common law provision relating to banker’s Liens, rights of set-off or similar rights and
remedies as to deposit accounts or other funds maintained with a creditor depository institution; 
 (9) Liens for taxes, assessments or
other governmental charges not yet due or payable or subject to penalties for non-payment or which are being contested in good faith by appropriate proceedings; 

(10) Liens to secure the performance of bids, trade contracts, leases, statutory obligations, surety and appeal bonds, performance bonds and
other obligations of a like nature; 
 (11) pledges or deposits under workmen’s compensation, unemployment insurance, or similar
legislation and liens of judgments thereunder which are not currently dischargeable, or deposits to secure public or statutory obligations, or deposits in connection with obtaining or maintaining self-insurance or to obtain the benefits of any law,
regulation or arrangement pertaining to workmen’s compensation, unemployment insurance, old age pensions, social security or similar matters, or deposits of cash or obligations of the U.S. to secure surety, appeal or customs bonds, or deposits
in litigation or other proceedings such as, but not limited to, interpleader proceedings; 
 (12) Liens consisting of easements,
rights-of-way, zoning restrictions, restrictions on the use of real property, and defects and irregularities in the title thereto, landlords’ Liens and other similar Liens none of which interfere materially with the use of the property covered
thereby in the ordinary course of business and which do not, in the Company’s opinion, materially detract from the value of such properties; 

(13) Liens in favor of the United States or any state, territory or possession thereof (or the District of Columbia), or any department,
agency, instrumentality or political subdivision of the United States or any state, territory or possession thereof (or the District of Columbia), to secure partial, progress, advance or other payments pursuant to any contract or statute or to
secure any indebtedness incurred for the purpose of financing all or any part of the purchase price or the cost of constructing or improving the property subject to such Liens; or 

(14) any extension, renewal or replacement of any Lien referred to in clauses (1) through (13) above, inclusive, so long as
(i) the principal amount of the indebtedness secured thereby does not exceed the principal amount of indebtedness so secured at the time of the extension, renewal or replacement (except to the extent of any fees or other costs associated with
any such extension, renewal or replacement) and (ii) the Lien is limited to the same property subject to the Lien so extended, renewed or replaced (and improvements on the property). 

  
 6 

 Notwithstanding the restrictions set forth in the second paragraph of Section 1.5(a) of this
Third Supplemental Indenture, the Company and its Restricted Subsidiaries will be permitted to incur indebtedness secured by Liens which would otherwise be subject to the foregoing restrictions without equally and ratably securing the Notes,
provided that, after giving effect to such indebtedness, the aggregate amount of all indebtedness secured by Liens (not including Liens permitted under clauses (1) through (14) above), together with all Attributable Debt outstanding
pursuant to second paragraph of Section 1.5(b) of this Third Supplemental Indenture, does not exceed 15% of the Consolidated Net Tangible Assets of the Company. The Company and its Restricted Subsidiaries also may, without equally and ratably
securing the Notes, create or incur Liens that extend, renew, substitute or replace (including successive extensions, renewals, substitutions or replacements), in whole or in part, any Lien permitted pursuant to the preceding sentence. 

(b) Limitation on Sale and Leaseback Transactions 

The Company will not, and will not permit any of its Restricted Subsidiaries to, enter into any sale and leaseback transaction for the sale
and leasing back of any Principal Property, whether now owned or hereafter acquired, unless: 
 (1) such transaction was entered into prior
to the date of the initial issuance of the Notes (other than any Additional Notes); 
 (2) such transaction was for the sale and leasing
back to the Company or any of its wholly owned Subsidiaries of any Principal Property by one of its Restricted Subsidiaries; 
 (3) such
transaction involves a lease for not more than three years (or which may be terminated by the Company or its Subsidiaries within a period of not more than three years); 

(4) the Company would be entitled to incur indebtedness secured by a Lien with respect to such sale and leaseback transaction without equally
and ratably securing the Notes pursuant to the second paragraph of Section 1.5(a) of this Third Supplemental Indenture; or 
 (5) The
Company or any Restricted Subsidiary applies an amount equal to the net proceeds from the sale of such Principal Property to the purchase of other property or assets used or useful in its business (including the purchase or development of other
Principal Property) or to the retirement of indebtedness that is pari passu with the Notes (including the Notes) within 365 days before or after the effective date of any such sale and leaseback transaction, provided that, in lieu of applying such
amount to the retirement of pari passu indebtedness, the Company may deliver Notes to the trustee for cancellation, such Notes to be credited at the cost thereof to it. 

Notwithstanding the restrictions set forth in Section 1.5(b) of this Third Supplemental Indenture, the Company and its Restricted
Subsidiaries may enter into any sale and leaseback transaction which would otherwise be subject to the restrictions in the first paragraph of Section 1.5(b) of this Third Supplemental Indenture, if after giving effect thereto the aggregate
amount of all Attributable Debt with respect to such transactions, together with all indebtedness outstanding pursuant to the third paragraph of Section 1.5(a) of this Third Supplemental Indenture, does not exceed 15% of the Consolidated Net
Tangible Assets of the Company. 
 Section 1.6 Events of Default. 

This Section 1.6 shall replace Section 6.01 of the Base Indenture with respect to the Notes only. 

(a) With respect to the Notes, “Event of Default” means any one or more of the following events that has occurred and is
continuing: 
 (1) default in the payment of any interest on any Note when it becomes due and payable, and the continuance of such default
for a period of 30 days (unless the entire amount of such payment is deposited by the Company with the Trustee or a Paying Agent prior to the expiration of such 30-day period); 

(2) default in the payment of the principal of or any premium, if any, on, any Note when due at its Stated Maturity, upon optional redemption
pursuant to Section 1.3 of this Third Supplemental Indenture or otherwise; 
 (3) failure by the Company to repurchase the Notes
tendered for repurchase following a Change of Control Repurchase Event in accordance with Section 1.4 of this Third Supplemental Indenture; 

(4) default in the performance or breach of any covenant by the Company in the Indenture (other than those referred to in (1), (2) or
(3) above and other than a covenant that has been included in the Indenture solely for the benefit of another series of Securities), which default continues uncured for a period of 90 days after the Company receives, by registered or certified
mail, written notice from the Trustee or the Company and the Trustee receive, by registered or certified mail, written notice from the Holders of not less than 25% in principal amount of the Notes Outstanding; 

(5) the entry by a court having competent jurisdiction of: 

(A) an order for relief in respect of the Company in an involuntary proceeding under any Bankruptcy Law and such order shall remain unstayed
and in effect for a period of 60 consecutive days; or 

  
 7 

 (B) a final and non-appealable order appointing a Custodian, of the Company, or ordering the
winding up or liquidation of the affairs of the Company, and such order shall remain unstayed and in effect for a period of 60 consecutive days; 

(6) the commencement by the Company of a voluntary proceeding under any Bankruptcy Law or the consent by the Company to the entry of a decree
or order for relief in an involuntary proceeding under any Bankruptcy Law or the filing by the Company of a consent to an order for relief in any involuntary proceeding under any Bankruptcy Law or to the appointment of a Custodian or the making by
the Company of an assignment for the benefit of creditors. 
 (7)(a) the failure by the Company to make any payment at maturity, including
any applicable grace period, on any indebtedness of the Company (other than indebtedness of the Company owing to any of its Subsidiaries) outstanding in an amount in excess of $50,000,000 and continuance of this failure to pay or (b) a default
on any indebtedness of the Company (other than indebtedness owing to any of its Subsidiaries), which default results in the acceleration of such indebtedness in an amount in excess of $50,000,000 without such indebtedness having been discharged or
the acceleration having been cured, waived, rescinded or annulled, in the case of clause (a) or (b) above, for a period of 30 days after written notice thereof to the Company by the Trustee or to the Company and the Trustee by the Holders
of not less than 25% in principal amount of Outstanding Notes (including any Additional Notes); provided, however, that if any failure, default or acceleration referred to in clause (a) or (b) above ceases or is cured, waived, rescinded or
annulled, then the Event of Default will be deemed cured. 
 ARTICLE II 

MISCELLANEOUS 
 Section 2.1
Definitions. 
 Capitalized terms used but not defined in this Third Supplemental Indenture shall have the meanings ascribed thereto
in the Base Indenture. 
 Section 2.2 Amendment to Section 11.03. 

For purposes of this Third Supplemental Indenture, references in Sections 11.03(c)(iv) and 11.03(c)(v) of the Base Indenture to
“Holders” of Outstanding Securities shall be deemed to refer to beneficial owners of such Outstanding Securities. 
 Section 2.3
Confirmation of Indenture. 
 The Base Indenture, as supplemented and amended by this Third Supplemental Indenture, is in all respects
ratified and confirmed, and the Base Indenture, this Third Supplemental Indenture and all indentures supplemental thereto shall be read, taken and construed as one and the same instrument. 

Section 2.4 Concerning the Trustee. 

In carrying out the Trustee’s responsibilities hereunder, the Trustee shall have all of the rights, protections and immunities which it
possesses under the Indenture. The recitals contained herein and in the Notes, except the Trustee’s certificate of authentication, shall be taken as the statements of the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this Third Supplemental Indenture or of the Notes. The Trustee shall not be accountable for the use or application by the Company of the Notes or the proceeds thereof. 

Section 2.5 Governing Law. 
 This
Third Supplemental Indenture and the Notes shall be deemed to be a contract made under the internal laws of the State of New York, and for all purposes shall be construed in accordance with the laws of said State. 

Section 2.6 Separability. 
 In case
any provision in this Third Supplemental Indenture or in the Notes shall for any reason be held to be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or
impaired thereby. 
 Section 2.7 Counterparts. 

This Third Supplemental Indenture may be executed in any number of counterparts each of which shall be an original, but such counterparts shall
together constitute but one and the same instrument. 
 Section 2.8 Conflicts with Base Indenture

In the event that any provision of this Third Supplemental Indenture limits, qualifies or conflicts with a provision of the Base Indenture,
such provision of the Third Supplemental Indenture will control. 
 Section 2.9 No Benefit. 

Nothing in this Third Supplemental Indenture, express or implied, shall give to any Person other than the parties hereto and their successors
or assigns, and the Holders of the Notes, any benefit or legal or equitable rights, remedy or claim under this Third Supplemental Indenture or the Base Indenture. 
  

  
 8 

 IN WITNESS WHEREOF, the parties hereto have caused this Third Supplemental Indenture to be duly
executed all as of the day and year first above written. 
  

			
	AUTODESK, INC.
		
	By:	 	/s/ R. Scott Herren
		 	Name: R. Scott Herren
		 	Title:   Senior Vice President and Chief Financial Officer

  
 [Signature Page
to the Third Supplemental Indenture] 

 
			
	 U.S. BANK NATIONAL ASSOCIATION,

as Trustee

		
	By:	 	/s/ Bradley E. Scarbrough
		 	Name: Bradley E. Scarbrough
		 	Title:   Vice President

  
 [Signature Page
to the Third Supplemental Indenture] 

 EXHIBIT A 

FORM OF [    ]% NOTES DUE [    ] 

[Insert the Global Security legend, if applicable] 

AUTODESK, INC. 
 3.500%
NOTES DUE 2027 
  

			
	No. [    ]	  	$[    ]
	CUSIP No. [    ]	  	

 Autodesk, Inc., a Delaware corporation (the “Company”), promises to pay to [ ] or registered
assigns, the principal sum of [ ] Dollars on June 15, 2027. 
 Interest Payment Dates: June 15 and December 15 

Record Dates: June 1 and December 1 

Each holder of this Security (as defined below), by accepting the same, agrees to and shall be bound by the provisions hereof and of the
Indenture described herein, and authorizes and directs the Trustee described herein on such holder’s behalf to be bound by such provisions. Each holder of this Security hereby waives all notice of the acceptance of the provisions contained
herein and in the Indenture and waives reliance by such holder upon said provisions. 
 This Security shall not be entitled to any benefit
under the Indenture, or be valid or become obligatory for any purpose, until the Certificate of Authentication hereon shall have been manually signed by or on behalf of the Trustee. The provisions of this Security are continued on the reverse side
hereof, and such continued provisions shall for all purposes have the same effect as though fully set forth at this place. 

  
 A-1 

 IN WITNESS WHEREOF, the Company has caused this instrument to be signed in accordance with
Section 2.04 of the Base Indenture. 
  

			
	AUTODESK, INC.
	  

	Name:	 	
	Title:	 	

  
 A-2 

 CERTIFICATE OF AUTHENTICATION 

This is one of the 3.500% Notes due 2027 issued by Autodesk, Inc. of the series designated therein referred to in the within-mentioned
Indenture. 
 Date: [    ] 
  

			
	 U.S. BANK NATIONAL ASSOCIATION
 as
Trustee

		
	By:	 	 
		 	Authorized Signatory

  
 A-3 

 (Reverse of Note) 

AUTODESK, INC. 
 3.500%
Notes due 2027 
 This security is one of a duly authorized series of debt securities of Autodesk, Inc., a Delaware corporation (the
“Company”), issued or to be issued in one or more series under and pursuant to an Indenture for the Company’s senior debt securities, dated as of December 13, 2012 (the “Base Indenture”), duly executed and delivered by
and among the Company and U.S. Bank National Association (the “Trustee”), as supplemented by the Third Supplemental Indenture, dated as of June 8, 2017 (the “Third Supplemental Indenture”), by and between the Company and the
Trustee. The Base Indenture as supplemented and amended by the Third Supplemental Indenture is referred to herein as the “Indenture.” By the terms of the Base Indenture, the debt securities issuable thereunder are issuable in series that
may vary as to amount, date of maturity, rate of interest and in other respects as provided in the Base Indenture. This security is one of the series designated on the face hereof (individually, a “Security,” and collectively, the
“Securities”), and reference is hereby made to the Indenture for a description of the rights, limitations of rights, obligations, duties and immunities of the Trustee, the Company and the holders of the Securities (the
“Securityholders”). Capitalized terms used herein and not otherwise defined shall have the meanings given them in the Base Indenture or the Third Supplemental Indenture, as applicable. 

1. Interest. The Company promises to pay interest on the principal amount of this Security at an annual rate of [ ]%. The Company will
pay interest semi-annually on June 15 and December 15 of each year (each such day, an “Interest Payment Date”). If any Interest Payment Date, redemption date or maturity date of this Security is not a Business Day, then payment
of interest or principal (and premium, if any) shall be made on the next succeeding Business Day with the same force and effect as if made on the date such payment was due, and no interest shall accrue for the period after such date to the date of
such payment on the next succeeding Business Day. Interest on the Securities will accrue from the most recent date to which interest has been paid or duly provided for or, if no interest has been paid, from the date of issuance; provided that, if
there is no existing Default in the payment of interest, and if this Security is authenticated between a regular record date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue from such next
succeeding Interest Payment Date; and provided, further, that the first Interest Payment Date shall be December 15, 2017. Interest will be calculated on the basis of a 360-day year of twelve 30-day months. All dollar amounts resulting from this
calculation shall be rounded to the nearest cent. 
 2. Method of Payment. The Company will pay interest on the Securities (except
defaulted interest), if any, to the Persons in whose name such Securities are registered at the close of business on the regular record date referred to on the facing page of this Security for such interest installment. In the event that the
Securities or a portion thereof are called for redemption or there is a Change of Control Notice, and the Optional Redemption Date or the Change of Control Payment Date, as applicable, is subsequent to a regular record date with respect to any
Interest Payment Date and prior to such Interest Payment Date, interest on such Securities will instead be paid upon presentation and surrender of such Securities as provided in the Indenture. The principal of and the interest on the Securities
shall be payable in the coin or currency of the United States of America that at the time is legal tender for public and private debt, at the office or agency of the Company maintained for that purpose in accordance with the Indenture. If any of the
Notes are no longer represented by a Global Security, payment of interest on certificated notes in definitive form may, at the option of Company, be made by (i) check mailed to the address of the Person entitled thereto as such address shall
appear in the Security Register, or (ii) upon request of any Holder of at least $5,000,000 principal amount of Securities, wire transfer to an account located in the United States maintained by the such payee. 

3. Paying Agent and Registrar. Initially, U.S. Bank National Association, the Trustee, will act as paying agent and Security Registrar.
The Company may change or appoint any paying agent or Security Registrar without notice to any Securityholder. The Company or any of its Subsidiaries may act in any such capacity. 

4. Indenture. The terms of the Securities include those stated in the Indenture and those made part of the Indenture by reference to
the Trust Indenture Act of 1939 (“TIA”) as in effect on the date the Indenture is qualified. The Securities are subject to all such terms, and Securityholders are referred to the Indenture and TIA for a statement of such terms. The
Securities are unsecured general obligations of the Company and constitute the series designated on the face hereof as the “3.500% Notes due 2027”, initially limited to $500,000,000 in aggregate principal amount. The Company will furnish
to any Securityholder upon written request and without charge a copy of the Base Indenture and the Third Supplemental Indenture. Requests may be made to: Autodesk, Inc., 111 McInnis Parkway, San Rafael, California 94903, Attention: General Counsel.

 5. Redemption. The Securities may be redeemed at the option of the Company prior to the Stated Maturity, as provided in
Section 1.3 of the Third Supplemental Indenture. 
 The Company shall not be required to make sinking fund payments with respect to the
Securities. 
 6. Change of Control Repurchase Event. Upon the occurrence of a Change of Control Repurchase Event, unless the Company
has exercised its right to redeem this Security or the Company has defeased this Security or satisfied and discharged this Security, the holder of this Security will have the right to require that the Company purchase all or a portion, (such
principal amount to be equal to $2,000 or any integral multiple of $1,000 in excess of $2,000), of this Security at a purchase price equal to 101% of the principal amount repurchased plus accrued and unpaid interest, if any, on the amount to be
repurchased to, but excluding, the date of purchase. Within 30 days following any Change of Control Repurchase Event, the Company shall deliver a notice to each Holder, in accordance with Section 1.4 of the Third Supplemental Indenture, with a
copy to the Trustee, which notice shall govern the terms of the Change of Control Right. 

  
 A-4 

 7. Denominations, Transfer, Exchange. The Securities are in registered form without
coupons in the denominations of $2,000 or any integral multiple of $1,000 in excess thereof. The transfer of Securities may be registered and Securities may be exchanged as provided in the Indenture. The Securities may be presented for exchange or
for registration of transfer (duly endorsed or with the form of transfer endorsed thereon duly executed if so required by the Company or the Security Registrar) at the office of the Security Registrar or at the office of any transfer agent
designated by the Company for such purpose. No service charge will be made for any registration of transfer or exchange, but a Securityholder may be required to pay any applicable taxes or other governmental charges. If the Securities are to be
redeemed, the Company will not be required to: (i) issue, register the transfer of, or exchange any Security during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption of less than all of
the Outstanding Securities of the same series and ending at the close of business on the day of such mailing; (ii) register the transfer of or exchange any Security of any series or portions thereof selected for redemption, in whole or in part,
except the unredeemed portion of any such Security being redeemed in part; nor (iii) register the transfer of or exchange of a Security of any series between the applicable record date and the next succeeding Interest Payment Date. 

8. Persons Deemed Owners. The registered Securityholder may be treated as its owner for all purposes. 

9. Repayment to the Company. Any funds or Governmental Obligations deposited with any paying agent or the Trustee, or then held by the
Company, in trust for payment of principal of, premium, if any, or interest on the Securities of a particular series that are not applied but remain unclaimed by the Holders of such Securities for at least two years after the date upon which the
principal of, premium, if any, or interest on such Securities shall have respectively become due and payable, shall, upon request of the Company, be repaid to the Company, or (if then held by the Company) shall be discharged from such trust. After
return to the Company, Holders entitled to the money or securities must look to the Company, as applicable, for payment as unsecured general creditors. 

10. Amendments, Supplements and Waivers. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and
the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority
in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the Securities of each series at the time Outstanding, on
behalf of the Holders of all Securities of such series, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Security. 
 11. Defaults and Remedies. If an Event of Default with respect to the securities of
a series issued pursuant to the Third Supplemental Indenture occurs and is continuing (other than certain events of bankruptcy, insolvency or reorganization of the Company), the Trustee or the holders of at least 25% in aggregate principal amount of
the Securities of such series then Outstanding, by notice in writing to the Company (and to the Trustee if notice is given by such holders), may declare the unpaid principal of, premium, if any, and accrued interest, if any, due and payable
immediately. In the case of certain events of bankruptcy, insolvency or reorganization of the Company, the principal and accrued and unpaid interest, if any, on all outstanding Securities will become and be immediately due and payable. Subject to
the terms of the Indenture, if an Event of Default under the Indenture shall occur and be continuing, the Trustee will be under no obligation to exercise any of its rights or powers under the Indenture at the request or direction of any of the
holders, unless such holders have offered the Trustee indemnity satisfactory to it. Upon satisfaction of certain conditions set forth in the Indenture, the holders of a majority in principal amount of the Outstanding securities of a series issued
pursuant to the Third Supplemental Indenture will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred on the Trustee, with respect to
the securities of such series. 
 12. Trustee, Paying Agent and Security Registrar May Hold Securities. The Trustee, subject to
certain limitations imposed by the TIA, or any paying agent or Security Registrar, in its individual or any other capacity, may become the owner or pledgee of Securities with the same rights it would have if it were not Trustee, paying agent or
Security Registrar. 
 13. No Recourse Against Others. No recourse under or upon any obligation, covenant or agreement of the
Indenture, or of any Security, or for any claim based thereon or otherwise in respect hereof or thereof, shall be had against any incorporator, stockholder, officer or director, past, present or future as such, of the Company or of any predecessor
or successor corporation, either directly or through the Company or any such predecessor or successor corporation, whether by virtue of any constitution, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise; it
being expressly understood that the Indenture and the obligations issued hereunder and thereunder are solely corporate obligations, and that no such personal liability whatever shall attach to, or is or shall be incurred by, the incorporators,
stockholders, officers or directors as such, of the Company or of any predecessor or successor corporation, or any of them, because of the creation of the indebtedness authorized by the Indenture, or under or by reason of the obligations, covenants
or agreements contained in the Indenture or in the Securities or implied therefrom; and that any and all such personal liability of every name and nature, either at common law or in equity or by constitution or statute, of, and any and all such
rights and claims against, every such incorporator, stockholder, officer or director as such, because of the creation of the indebtedness authorized by the Indenture, or under or by reason of the obligations, covenants or agreements contained in the
Indenture or in the Securities or implied therefrom, are hereby expressly waived and released as a condition of, and as a consideration for, the acceptance of the Securities. 

14. Discharge of Indenture. The Indenture contains certain provisions pertaining to discharge and defeasance, which provisions shall
for all purposes have the same effect as if set forth herein. 
 15. Authentication. This Security shall not be valid until the
Trustee manually signs the certificate of authentication attached to the other side of this Security. 

  
 A-5 

 16. Abbreviations. Customary abbreviations may be used in the name of a Securityholder or
an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act). 

17. Governing Law. The Base Indenture, the Third Supplemental Indenture and this Security shall be deemed to be a contract made under
the internal laws of the State of New York, and for all purposes shall be construed in accordance with the laws of said State. 

  
 A-6 

 ASSIGNMENT FORM 

To assign this Security, fill in the form below: (I) or (we) assign and transfer this Security to 

 

	
	  

	(Insert assignee’s soc. sec. or tax I.D. no.)
	
	  

	
	  

	
	  

	
	  

 (Print or type assignee’s name, address and zip code) 

and irrevocably appoint [                    ] as
agent to transfer this Security on the books of the Company. The agent may substitute another to act for him. 
 Date:
                                        

  

			
	Your Signature:
	
	  

	(Sign exactly as your name appears on the face of this Security)

  

			
	Signature Guarantee:	 	  

		 	(Signature must be guaranteed by a participant in a recognized signature guarantee medallion program)

  
 A-7 

 OPTION OF HOLDER TO ELECT PURCHASE 

If you want to elect to have this Security purchased by the Company pursuant to Section 1.4 of the Third Supplemental Indenture, check
the box: 
  

	☐	1.4 Change of Control Repurchase Event 

 If you want to elect to have only part of this Note
purchased by the Company pursuant to Section 1.4 of the Third Supplemental Indenture, state the amount:
$                                         
                                         
                                       

 

							
	Date:	 	  
	 		  	Your Signature:
		 		 		  	(Sign exactly as your name appears on the other side of the Security)
				
		 		 		  	Tax I.D. number

  

			
	Signature Guarantee:	  	  

		  	(Signature must be guaranteed by a participant in a recognized signature guarantee medallion program)

  
 A-8EX-4.1

 Exhibit 4.1 

ATMOS ENERGY CORPORATION 

Officers’ Certificate Pursuant to Section 301 of the Indenture 

June 8, 2017 
 Each of the
undersigned, Christopher T. Forsythe, Senior Vice President and Chief Financial Officer, and Phillip L. Allbritten, Associate General Counsel and Assistant Corporate Secretary of Atmos Energy Corporation (the “Company”) certifies, pursuant
to the authority delegated to each of them, as an officer of the Company, pursuant to the resolutions adopted by the board of directors of the Company (the “Board”) on May 2, 2017 (copies of which resolutions are attached hereto as
Exhibit I), that pursuant to Section 301 of the Indenture dated as of March 26, 2009 (the “Indenture”) between the Company and U.S. Bank National Association, as trustee (the “Trustee”), the series of debt
securities of the Company described herein are hereby established with the following terms and provisions (unless otherwise defined herein, capitalized terms used herein have the meaning given thereto in the Indenture): 

1. The titles of the series of securities to be issued are the 3.000% Senior Notes due 2027 (the “2027 Notes”) and
the 4.125% Senior Notes due 2044 (the “additional 2044 Notes”). The additional 2044 Notes are an additional issuance of the Company’s 4.125% Senior Notes due 2044 originally issued on October 15, 2014 (the additional 2044 Notes,
together with the previously issued 4.125% Senior Notes due 2044, the “2044 Notes;” and the 2027 Notes, together with the additional 2044 Notes, the “Notes”). 

2. The Notes are unsubordinated and will rank equally with all of the Company’s other unsecured and unsubordinated debt.
Subordinated debt will rank junior to the Notes and the Company’s other senior debt. 
 3. Prior to the issuance of the
additional 2044 Notes, there are $500,000,000 aggregate principal amount of 2044 Notes outstanding under the Indenture. The aggregate principal amount of the additional 2044 Notes that initially may be issued under the Indenture, in connection with
the Underwriting Agreement, dated as of June 5, 2017, among the Company and certain underwriters named therein (the “Underwriting Agreement”), is $250,000,000, and the Stated Maturity of the 2044 Notes is October 15, 2044. The
additional 2044 Notes shall be offered to the public at a price representing 103.907% of their principal amount. 
 4. The
aggregate principal amount of the 2027 Notes that initially may be issued under the Indenture, in connection with the Underwriting Agreement, is $500,000,000, and the Stated Maturity of the 2027 Notes is June 15, 2027. The 2027 Notes shall be
offered to the public at a price representing 99.725% of their principal amount. 
 5. The additional 2044 Notes shall bear
interest at the rate of 4.125% per annum. Interest on the additional 2044 Notes will be payable in arrears on April 15 and October 15 of each year (each, a “2044 Notes Interest Payment Date”), beginning October 15, 2017.
Interest payable on each 2044 Notes Interest Payment Date will 

 
include interest accrued from and including April 15, 2017, or from and including the most recent 2044 Notes Interest Payment Date to which interest has been paid or duly provided for, as
the case may be, to but excluding such 2044 Notes Interest Payment Date. Interest will be computed on the basis of a 360-day year of twelve 30-day months. The interest
so payable, and punctually paid or duly provided for, on any 2044 Notes Interest Payment Date will, as provided in the Indenture, be paid to the Holder in whose name the 2044 Notes are registered at the close of business on the April 1 or
October 1 (whether or not a Business Day) preceding the respective 2044 Notes Interest Payment Date. The payment of any Defaulted Interest on the 2044 Notes shall be payable to the Holders of the 2044 Notes on a Special Record Date established
therefor pursuant to the Indenture, or shall be paid at any time in any other lawful manner, all as more fully provided in the Indenture. 

6. The 2027 Notes shall bear interest at the rate of 3.000% per annum. Interest on the 2027 Notes will be payable in arrears on
June 15 and December 15 of each year (each, a “2027 Notes Interest Payment Date”), beginning December 15, 2017. Interest payable on each 2027 Notes Interest Payment Date will include interest accrued from and including
June 8, 2017, or from and including the most recent 2027 Notes Interest Payment Date to which interest has been paid or duly provided for, as the case may be, to but excluding such 2027 Notes Interest Payment Date. Interest will be computed on
the basis of a 360-day year of twelve 30-day months. The interest so payable, and punctually paid or duly provided for, on any 2027 Notes Interest Payment Date will, as
provided in the Indenture, be paid to the Holder in whose name the 2027 Notes are registered at the close of business on the June 1 or December 1 (whether or not a Business Day) preceding the respective 2027 Notes Interest Payment Date.
The payment of any Defaulted Interest on the 2027 Notes shall be payable to the Holders of the 2027 Notes on a Special Record Date established therefor pursuant to the Indenture, or shall be paid at any time in any other lawful manner, all as more
fully provided in the Indenture. 
 7. Payment of the principal of (and premium, if any) and interest on the Notes will be
made at the office or agency of the Company maintained for that purpose in the Borough of Manhattan, the City of New York, or at such other office or agency of the Company as may be maintained for such purpose, in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of public and private debts. So long as the Notes remain in book-entry form, all payments of principal and interest will be made by the Company in immediately available funds.

 8. The Company may redeem the 2044 Notes prior to maturity at its option, at any time in whole or from time to time in
part. Prior to April 15, 2044, the Redemption Price with respect to the 2044 Notes shall be equal to the greater of: 

(a) 100% of the principal amount of the 2044 Notes to be redeemed, and 

(b) as determined by the Quotation Agent (as defined below), the sum of the present values of the Remaining Scheduled Payments
(as defined below) of principal and interest on the 2044 Notes to be redeemed discounted to the Redemption Date on a semi-

  
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annual basis assuming a 360-day year consisting of twelve 30-day months at the Adjusted Treasury Rate (as defined
below) plus 15 basis points; plus, in each case, accrued and unpaid interest on the principal amount of 2044 Notes being redeemed to the Redemption Date. 

At any time on or after April 15, 2044, the Redemption Price with respect to the 2044 Notes shall be equal to 100% of the principal amount
of the 2044 Notes to be redeemed, plus accrued and unpaid interest thereon to the Redemption Date. 
 9. The Company may
redeem the 2027 Notes prior to maturity at its option, at any time in whole or from time to time in part. Prior to March 15, 2027, the Redemption Price with respect to the 2027 Notes shall be equal to the greater of: 

(a) 100% of the principal amount of the 2027 Notes to be redeemed, and 

(b) as determined by the Quotation Agent (as defined below), the sum of the present values of the Remaining Scheduled Payments
(as defined below) of principal and interest on the 2027 Notes to be redeemed that would be due if the 2027 Notes matured on the Par Call Date (as defined below), discounted to the Redemption Date on a semi-annual basis assuming a 360-day year consisting of twelve 30-day months at the Adjusted Treasury Rate (as defined below) plus 15 basis points; plus, in each case, accrued and unpaid interest on the
principal amount of 2027 Notes being redeemed to the Redemption Date. 
 At any time on or after March 15, 2027, the Redemption Price
with respect to the 2027 Notes shall be equal to 100% of the principal amount of the 2027 Notes to be redeemed, plus accrued and unpaid interest thereon to the Redemption Date. 

“Adjusted Treasury Rate” means, for any Redemption Date, the rate per annum equal to the semi-annual equivalent yield
to maturity of the Comparable Treasury Issue, assuming a price of the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for that Redemption Date; 

“Comparable Treasury Issue” means, with respect to a series of Notes, the United States Treasury security selected by
the Quotation Agent as having a maturity comparable to the remaining term of the Notes of such series to be redeemed (assuming, with respect to the 2027 Notes, that they matured on the Par Call Date) that would be used, at the time of a selection
and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes of such series to be redeemed; 

“Comparable Treasury Price” means, for any Redemption Date, the average of the Reference Treasury Dealer Quotations
for that Redemption Date; 
 “Par Call Date” means, with respect to the 2027 notes, March 15, 2027; 

“Primary Treasury Dealer” means a primary U.S. government securities dealer in New York City; 

  
 3 

 “Quotation Agent” means the Reference Treasury Dealer appointed by the
Company to act as a quotation agent; 
 “Reference Treasury Dealer” means: (i) with respect to the 2044 Notes
(A) Merrill Lynch, Pierce, Fenner & Smith Incorporated and any Primary Treasury Dealer selected by each of Credit Agricole Securities (USA) Inc. and Wells Fargo Securities, LLC, and any of such parties’ successors, and
(B) any other Primary Treasury Dealer selected by the Company; and (ii) with respect to the 2027 Notes, each of BNP Paribas Securities Corp., J.P. Morgan Securities LLC, and Wells Fargo Securities, LLC, and their respective successors;
provided, however, that with respect to a series of Notes, if any of the entities listed above for such series ceases to be a Primary Treasury Dealer, the Company will substitute therefor another Primary Treasury Dealer for such series of
Notes; 
 “Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any
Redemption Date, the average, as determined by the Trustee, of the bid and asked prices for the Comparable Treasury Issue (expressed, in each case, as a percentage of its principal amount) quoted in writing to the Trustee at 5:00 p.m., Eastern time
by such Reference Treasury Dealer on the third Business Day preceding such Redemption Date; and 
 “Remaining Scheduled
Payments” means, with respect to each Note to be redeemed, the remaining scheduled payments of the principal and interest on such Note that would be due after the related Redemption Date but for such redemption; provided, however, that if such
Redemption Date is not a 2044 Notes Interest Payment Date with respect to the additional 2044 Notes or a 2027 Notes Interest Payment Date with respect to the 2027 Notes, the amount of the next succeeding scheduled interest payment on such Note will
be reduced by the amount of interest accrued on such Note to such Redemption Date. 
 10. In the case of a partial redemption
of the Notes of a series, the Notes to be redeemed shall be selected by the Trustee from the outstanding Notes of such series not previously called for redemption, in the case of the 2027 Notes, in accordance with the procedures of the Depository
and, in the case of the 2044 Notes, by such method as the Trustee shall deem fair and appropriate (or, in the case of Notes issued in global form, by such method as the Depository may require), and, in each case, which may provide for the selection
for redemption of portions of the principal of the Notes of such series. A partial redemption shall not reduce the portion of the principal amount of a Note not redeemed to a principal amount of less than $2,000. Notice of any redemption will be
mailed by first class mail at least 30 days but not more than 60 days before the Redemption Date to each Holder of the Notes of the series to be redeemed at its registered address. If any Notes are to be redeemed in part only, the notice of
redemption will state the portion of the principal amount of the Notes of the series to be redeemed. A new Note in a principal amount equal to the unredeemed portion of the Note will be issued in the name of the Holder of the Note upon surrender for
cancellation of the original Note. Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Notes or the portions of the Notes called for redemption. 

  
 4 

 11. Section 703 of the Indenture is replaced with the following in its
entirety for purposes of the Notes only: 
 The Company shall: 

(1) file with the Trustee, within 30 days after the Company has filed the same with the Commission, unless such reports are
available on the Commission’s EDGAR filing system (or any successor thereto), copies of the annual reports and of the information, documents and other reports (or copies of such portions of any of the foregoing as the Commission may from time
to time by rules and regulations prescribe) which the Company may be required to file with the Commission pursuant to Section 13 or Section 15(d) of the Exchange Act; or, if the Company is not required to file information, documents or reports
pursuant to either of such Sections, then the Company shall file with the Trustee and the Commission, in accordance with rules and regulations prescribed from time to time by the Commission, such of the supplementary and periodic information,
documents and reports which may be required pursuant to Section 13 of the Exchange Act in respect of a security listed and registered on a national securities exchange as may be prescribed from time to time in such rules and regulations; 

(2) file with the Trustee and the Commission, in accordance with rules and regulations prescribed from time to time by the
Commission, such additional information, documents and reports with respect to compliance by the Company with the conditions and covenants of this Indenture as may be required from time to time by such rules and regulations; and 

(3) transmit to all Holders, as their names and addresses appear in the Security Register, within 30 days after the filing
thereof with the Trustee, in the manner and to the extent provided in TIA Section 313(c), such summaries of any information, documents and reports required to be filed by the Company pursuant to Subsections (1) and (2) of this Section 703
as may be required by rules and regulations prescribed from time to time by the Commission. 
 12. The Company has no
obligation to redeem, purchase or repay the Notes pursuant to any mandatory redemption or sinking fund or analogous provisions or at the option of the Holder thereof. 

13. The entire principal amount of the Notes of a series shall be payable upon declaration of acceleration of the Maturity of
the Notes of such series pursuant to the Indenture. 
 14. The defeasance and covenant defeasance provisions of Article
Fourteen of the Indenture shall apply to the Notes. 
 15. The Trustee, the initial Paying Agent and the initial Security
Registrar for the Notes shall be U.S. Bank National Association. The Security Register for the Notes shall be initially maintained at, and the place where such Notes may be surrendered for registration of transfer or exchange shall be, the
Trustee’s Corporate Trust Office located at 1349 West Peachtree Street, Suite 1050, Atlanta, Georgia 30309. 

  
 5 

 16. The additional 2044 Notes will be issued in registered permanent global form
and each evidenced by a global security (a “Global Security”) in substantially the form attached hereto as Exhibit II-A, and the 2027 Notes will be issued in registered permanent global form
and each evidenced by a Global Security in substantially the form attached hereto as Exhibit II-B, with such appropriate insertions, omissions, substitutions and other variations as are required or
permitted by the Indenture, and may have imprinted or otherwise reproduced thereon such legend or legends or endorsements, not inconsistent with the provisions of the Indenture, as may be required to comply with any law or with any rules or
regulations pursuant thereto, or with any rules of any securities exchange or to conform to general usage, all as may be determined by the officers executing each such Global Security, as evidenced by their execution of such Global Security. The
beneficial owners of interests in each of the Global Securities may exchange such interests for the applicable series of Notes in certificated form (the “Definitive Notes”) only in limited circumstances as provided in the Indenture. In the
event that Definitive Notes are issued in exchange for a Global Security, the form of certificate evidencing each Definitive Note shall be in substantially the form of the applicable attached Global Security, with such changes as are necessary to
evidence the applicable series of Notes in definitive form rather than as a Global Security. The Company initially appoints DTC to act as Depository with respect to the Notes. 

17. The Notes are issuable in denominations of $2,000 and any integral multiples of $1,000 in excess thereof. 

18. The Events of Default set forth in the Indenture shall apply to the Notes. 

19. The Company will not pay Additional Amounts on the Notes held by any Holder who is not a United States person in respect of
any tax, assessment or governmental charge withheld or deducted. 
 20. The Company may, at any time, without the consent of
the Holders of the Notes of a series, create and issue additional securities having the same ranking, interest rate, maturity and other terms as the Notes of such series. Any such additional securities shall be consolidated and form the same series
of the Notes of such series having the same terms as to status, redemption and otherwise as the Notes of such series under the Indenture. 

Each of us further certifies that the form and terms of the Notes as established in this certificate have been established pursuant to
Section 301 of the Indenture and comply with the Indenture. 
 [Signature page follows] 

  
 6 

 IN WITNESS WHEREOF, I have executed this certificate as of the date first written above. 

 

					
	By:	 	  

		 	Name:	 	Christopher T. Forsythe
		 	Title:	 	Senior Vice President and
		 		 	Chief Financial Officer

 IN WITNESS WHEREOF, I have executed this certificate as of the date first written above. 

 

					
	By:	 	  

		 	Name:	 	Phillip L. Allbritten
		 	Title:	 	Associate General Counsel and Assistant Corporate Secretary

 Officer’s Certificate Pursuant to Section 301 of the Indenture

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