SunEdison, Inc. 2.625% Convertible Senior Notes due 2023

Exhibit 4.3

NO AFFILIATE (AS DEFINED IN RULE 144 UNDER THE SECURITIES ACT) OF THE COMPANY OR PERSON THAT HAS BEEN AN AFFILIATE (AS DEFINED IN RULE 144 UNDER THE SECURITIES ACT) OF THE COMPANY DURING THE IMMEDIATELY PRECEDING THREE MONTHS MAY PURCHASE, OTHERWISE ACQUIRE OR HOLD THIS NOTE OR A BENEFICIAL INTEREST HEREIN.

THIS SECURITY IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

THIS SECURITY AND THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THIS SECURITY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL INTEREST HEREIN, THE ACQUIRER:

PRIOR TO THE REGISTRATION OF ANY TRANSFER IN ACCORDANCE WITH CLAUSE (2)(D) ABOVE, THE COMPANY AND THE TRUSTEE OR THE TRANSFER AGENT FOR THE COMPANY’S COMMON STOCK, AS APPLICABLE, RESERVE THE RIGHT TO REQUIRE THE DELIVERY OF SUCH LEGAL OPINIONS, CERTIFICATIONS OR OTHER EVIDENCE AS MAY REASONABLY BE REQUIRED IN ORDER TO DETERMINE THAT THE PROPOSED TRANSFER IS BEING MADE IN COMPLIANCE WITH THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS, AND THE TRUSTEE AND THE TRANSFER AGENT FOR THE COMPANY’S COMMON STOCK WILL NOT BE REQUIRED TO ACCEPT FOR REGISTRATION OF TRANSFER ANY SECURITIES ACQUIRED BY A PURCHASER, INCLUDING UPON EXERCISE OF THE CONVERSION RIGHTS, EXCEPT UPON PRESENTATION OF EVIDENCE SATISFACTORY TO THE TRUSTEE OR TRANSFER AGENT, AS APPLICABLE, THAT THE RESTRICTIONS SET FORTH HEREIN HAVE BEEN COMPLIED WITH. NO REPRESENTATION IS MADE AS TO THE AVAILABILITY OF ANY EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT.

SunEdison, Inc.

2.625% Convertible Senior Notes due 2023

No.: A-1

SunEdison, Inc., a Delaware corporation (the “Company”), promises to pay to “Cede & Co.” or registered assigns, the principal amount of FOUR HUNDRED FIFTY MILLION UNITED STATES DOLLARS ($450,000,000.00), as revised by the Schedule of Increases and Decreases in the Global Note attached hereto, on June 1, 2023 (the “Maturity Date”).

Interest Payment Dates: June 1 and December 1.

Regular Record Dates: May 15 and November 15.

Additional provisions of this Security are set forth on the other side of this Note.

IN WITNESS WHEREOF, SunEdison, Inc. has caused this instrument to be signed manually or by facsimile by one of its duly authorized Officers.

This is one of the Notes referred to in the within-mentioned Indenture.

Dated:

[REVERSE OF NOTE]

SunEdison, Inc.

2.625% Convertible Senior Notes due 2023

This Note is one of a duly authorized issue of securities of the Company (herein called the “Notes”), issued under the Indenture dated as of May 20, 2015 by and between the Company and Wilmington Trust, National Association, herein called the “Trustee,” and reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Notes and of the terms upon which the Notes are, and are to be, authenticated and delivered.

This Note does not benefit from a sinking fund. This Note shall not be redeemable at the Company’s option.

As provided in and subject to the provisions of the Indenture, upon the occurrence of a Fundamental Change, the Holder of this Note will have the right, at such Holder’s option, to require the Company to purchase this Note, or any portion of this Note such that the principal amount of this Note that is not purchased equals $1,000 or an integral multiple of $1,000, on the Fundamental Change Purchase Date at a price equal to the Fundamental Change Purchase Price for such Fundamental Change Purchase Date.

As provided in and subject to the provisions of the Indenture, the Holder hereof has the right, prior to the Close of Business on the second Scheduled Trading Day immediately preceding the Maturity Date, to convert this Note or a portion of this Note such that the principal amount of this Note converted equals $1,000 or an integral multiple of $1,000, into a number of shares of Common Stock determined in accordance with Article 4 of the Indenture and subject to adjustment as set forth therein.

As provided in and subject to the provisions of the Indenture, the Company will make all payments in respect of the Fundamental Change Purchase Price for and the principal amount of, this Note to the Holder that surrenders this Note to the Paying Agent to collect such payments in respect of this Note. The Company will pay cash amounts in money of the U.S. that at the time of payment is legal tender for payment of public and private debts.

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 Notes to be effected 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 Notes at the time Outstanding. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Notes at the time Outstanding, on behalf of the Holders of all Notes, 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 Note shall be conclusive and binding upon such Holder and upon all future Holders of this Note and of any Note 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 Note.

As provided in and subject to the provisions of the Indenture, the Holder of this Note shall not have the right to institute any proceeding with respect to the Indenture, or for the appointment of a receiver or trustee, or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default with respect to the Note, the Holders of not less than 25% in principal amount of the Notes at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity to the Trustee, and the Trustee shall have failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity, and shall not have received from the Holders of a majority in principal amount of Notes at the time Outstanding a direction inconsistent with such request. The foregoing shall not apply to any suit instituted by the Holder of this Note for the enforcement of any payment of the principal hereof, premium, if any, or interest hereon, the Fundamental Change Purchase Price with respect to and the amount of cash, the number of shares of Common Stock or the combination thereof, as the case may be, due upon conversion of this Note or after the respective due dates expressed in the Indenture.

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay or deliver, as the case may be, the principal of (including the Fundamental Change Purchase Price), premium, interest on and the amount of cash, a number of shares of Common Stock or a combination of cash and shares of Common Stock, if any, as the case may be, due upon conversion of, this Note at the time, place and rate, and in the coin and currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note is registrable in the Register, upon surrender of this Note for registration of transfer to the Trustee, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Registrar duly executed by, the Holder hereof or its attorney duly authorized in writing, and thereupon a new Note of this series and of like tenor for the same aggregate principal amount will be issued to the designated transferee.

The Notes are issuable only in registered form without coupons in minimum denominations of $1,000 and integral multiples of $1,000. As provided in the Indenture and subject to certain limitations therein set forth, the Notes are exchangeable for a like aggregate principal amount of Notes and of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

Subject to the rights of the Holders as of the Regular Record Date to receive interest on the related Interest Payment Date, prior to due presentment of this Note for registration of transfer, the Company, the Trustee, the Agents and any of their respective agents may treat the Person in whose name the Note is registered as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee, the Agents nor any agents shall be affected by notice to the contrary.

Customary abbreviations may be used in the name of a Holder or an assignee, such as TEN COM (= tenants in common), TEN ENT (= tenants by the entirety), JT TEN (= joint tenants with rights of survivorship and not as tenants in common), CUST (= custodian) and U/G/M/A (= Uniform Gift to Minors Act).

Upon the issuance of any new Note, the Company may require payment by the Holder of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including fees and expenses of the Trustee) connected therewith.

All defined terms used in this Note that are defined in the Indenture shall have the meanings assigned to them in the Indenture. If any provision of this Note limits, qualifies or conflicts with a provision of the Indenture, such provision of the Indenture shall control.

ATTACHMENT 1

[FORM OF NOTICE OF CONVERSION]

To: SunEdison, Inc.

The undersigned owner of this Note hereby irrevocably exercises the option to convert this Note, or a portion hereof (which is such that the principal amount of the portion of this Note that will not be converted equals $1,000 or an integral multiple of $1,000 in excess thereof) below designated, into a number of shares of Common Stock in accordance with the terms of the Indenture referred to in this Note, and directs that any cash payable and any shares of Common Stock issuable and deliverable upon conversion, together with any Notes representing any unconverted principal amount hereof, be paid and/or issued and/or delivered, as the case may be, to the registered Holder hereof unless a different name is indicated below.

Subject to certain exceptions set forth in the Indenture, if this notice is being delivered on a date after the Close of Business on a Regular Record Date and prior to the Open of Business on the Interest Payment Date corresponding to such Regular Record Date, this notice must be accompanied by payment of an amount equal to the interest payable on such Interest Payment Date on the principal amount of this Note to be converted. If any shares of Common Stock are to be issued in the name of a Person other than the undersigned, the undersigned will pay all transfer taxes payable with respect to such issuance and transfer as set forth in the Indenture.

Principal amount to be converted (if less than all):

(Name)

(Address)

Please print name and address

(including zip code)

(Social Security or other Taxpayer

Identifying Number)

ATTACHMENT 2

[FORM OF FUNDAMENTAL CHANGE PURCHASE NOTICE]

To: SunEdison, Inc.

The undersigned registered owner of this Note hereby acknowledges receipt of a Fundamental Change Company Notice from SunEdison, Inc. (the “Company”) as to the occurrence of a Fundamental Change with respect to the Company and specifying the Fundamental Change Purchase Date and requests and instructs the Company to pay to the registered holder hereof in accordance with the applicable provisions of the Indenture referred to in this Note (i) the entire principal amount of this Note, or the portion thereof (that is such that the portion not to be purchased has a principal amount equal to $1,000 or an integral multiple of $1,000 in excess thereof) below designated, and (ii) if such Fundamental Change Purchase Date does not occur during the period after a Regular Record Date and on or prior to the Interest Payment Date corresponding to such Regular Record Date, accrued and unpaid interest, if any, thereon to, but excluding, such Fundamental Change Purchase Date.

Principal amount to be purchased (if less than all):

$        

Certificate number (if Notes are in certificated form)

ATTACHMENT 3

[FORM OF ASSIGNMENT AND TRANSFER]

For value received,                     hereby sell(s), assign(s) and transfer(s) unto                     (Please insert social security or Taxpayer Identification Number of assignee) the within Note, and hereby irrevocably constitutes and appoints                     to transfer the said Note on the books of the Company, with full power of substitution in the premises.

In connection with any transfer of the within Note occurring prior to the Resale Restriction Termination Date, as defined in the Indenture governing such Note, the undersigned confirms that such Note is being transferred:

¨ To SunEdison, Inc. or a subsidiary thereof; or

¨ Pursuant to a registration statement which has become effective under the Securities Act of 1933, as amended; or

¨ To a qualified institutional buyer in compliance with Rule 144A under the Securities Act of 1933, as amended; or

¨ Pursuant to an exemption from registration provided by Rule 144 under the Securities Act of 1933, as amended, or any other available exemption from the registration requirements of the Securities Act of 1933, as amended.

[TO BE SIGNED BY PURCHASER IF THE SECOND, THIRD OR FOURTH BOX ABOVE IS CHECKED]

[Include if the second, third or fourth box above is checked] [The undersigned (on the immediately following signature line) represents and warrants that it is not, and has not been for the immediately preceding 90 days, an “affiliate” (as defined in Rule 144 under the Securities Act of 1933, as amended) of SunEdison, Inc.]

[Include if the third box above is checked] [The undersigned (on the immediately following signature line) represents and warrants that it is purchasing this Note for its own account or an account with respect to which it exercises sole investment discretion and that it and any such account is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act and is aware that the sale to it is being made in reliance on Rule 144A and acknowledges that it has received such information regarding the Company as the undersigned has requested pursuant to Rule 144A or has determined not to request such information and that it is aware that the transferor is relying upon the undersigned’s foregoing representations in order to claim the exemption from registration provided by Rule 144A.]

Unless one of the above boxes is checked, the Trustee and Registrar will refuse to register any of the Notes evidenced by this certificate in the name of any Person other than the registered Holder thereof; provided that, if the fourth box is checked, the Company may require, prior to

registering any such transfer of the Notes, in its sole discretion, such legal opinions, certifications and other information as the Company may reasonably request to confirm that such transfer is being made pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act.

If none of the foregoing boxes is checked, the Trustee or Registrar shall not be obligated to register this Note in the name of any Person other than the Holder hereof unless and until the conditions to any such transfer of registration set forth herein and in Section 2.11 of the Indenture shall have been satisfied.

ATTACHMENT 4

SCHEDULE OF INCREASES AND DECREASES IN THE GLOBAL NOTE

Initial Principal Amount of Global Note: $450,000,000