Form 8-K

8-K — Spring Valley Acquisition Corp. III

Accession: 0001104659-26-077363

Filed: 2026-06-24

Period: 2026-06-23

CIK: 0002074850

SIC: 4911 (ELECTRIC SERVICES)

Item: Entry into a Material Definitive Agreement

Item: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

Item: Financial Statements and Exhibits

Documents

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported):

June 23, 2026

SPRING VALLEY ACQUISITION CORP. III

(Exact name of registrant as specified in its charter)

Cayman Islands

001-42822

N/A

(State or other jurisdiction

of incorporation)

(Commission File Number)

(IRS Employer

Identification No.)

4030

Maple Avenue, Suite

500

Dallas,

75219

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including

area code: (214) 308-5230

Not Applicable

(Former name or former address, if changed since

last report)

Check the appropriate box below if the Form 8-K

filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities

Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange

Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under

the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under

the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title

of each class

Trading

Symbol(s)

Name

of each exchange on which

registered

Units,

each consisting of one Class A ordinary share and one-third of one redeemable public warrant

SVACU

The

Nasdaq

Stock Market LLC

Class

A ordinary shares, par value $0.0001 per share

SVAC

The

Nasdaq

Stock Market LLC

Warrants,

each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50

SVACW

The

Nasdaq

Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth

company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities

Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging

growth company x

If an

emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for

complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 1.01. Entry into a Material Definitive Agreement

The

information provided in Item 2.03 of this Current Report on Form 8-K is incorporated by reference into this Item 1.01.

Item

2.03. Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

June 23, 2026, Spring Valley Acquisition Corp. III (the “Company”) issued an unsecured promissory note (the “Note”)

in the principal amount of up to $1,500,000 to Spring Valley Acquisition Sponsor III, LLC (the “Sponsor”), a significant shareholder

of the Company, which may be drawn down from time to time prior to the Maturity Date (defined below) upon request by the Company. The

Note does not bear interest and the principal balance will be payable on the date on which the Company consummates its initial business

combination (such date, the “Maturity Date”). In the event the Company consummates its initial business combination, the Sponsor

has the option on the Maturity Date to convert all or any portion of the principal outstanding under the Note into that number of warrants

(“Working Capital Warrants”) equal to the portion of the principal amount of the Note being converted divided by $0.90, rounded

up to the nearest whole number. The terms of the Working Capital Warrants, if any, would be identical to the terms of the private placement

warrants issued by the Company at the time of its initial public offering (the “IPO”), as described in the prospectus for

the IPO dated September 3, 2025 and filed with the U.S. Securities and Exchange Commission, including the transfer restrictions applicable

thereto. The Note is subject to customary events of default, the occurrence of certain of which automatically triggers the unpaid principal

balance of the Note and all other sums payable with regard to the Note becoming immediately due and payable.

The

issuance of the Note was made pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act of 1933,

as amended.

The

foregoing description of the Note is qualified in its entirety by reference to the full text of the Note, a copy of which is filed as

Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 9.01. Financial

Statements and Exhibits.

(d) Exhibits

Exhibit

No.

Description

10.1

Promissory Note, dated

June 23, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements

of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto

duly authorized.

SPRING VALLEY ACQUISITION CORP. III

By:

/s/ Christopher Sorrells

Name:

Christopher Sorrells

Title:

Chief Executive Officer and Chairman

Dated: June 24, 2026

EX-10.1 — EXHIBIT 10.1

EX-10.1

Filename: tm2617090d3_ex10-1.htm · Sequence: 2

Exhibit 10.1

THIS PROMISSORY NOTE (“NOTE”) HAS

NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED

FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES

ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

PROMISSORY NOTE

Principal Amount: Up to $1,500,000

Dated as of June 23, 2026

Spring Valley Acquisition

Corp. III, a Cayman Islands exempted company (“Maker”), promises to pay to the order of Spring Valley Acquisition

III Sponsor, LLC, a Delaware limited liability company, or its registered assigns or successors in interest (“Payee”),

the principal sum of One Million Five Hundred Thousand Dollars ($1,500,000) or such lesser amount as shall have been advanced by Payee

to Maker and shall remain unpaid under this promissory note (this “Note”), in lawful money of the United States

of America, on the terms and conditions described below. All payments on this Note shall be made by check or wire transfer of immediately

available funds or as otherwise determined by the Maker to such account as the Payee may from time to time designate by written notice

in accordance with the provisions of this Note.

1.             Principal. Payee may make advances to Maker from time to time under this Note; provided, however, that notwithstanding

anything to the contrary herein, at no time shall the aggregate of all advances and re-advances outstanding under this Note exceed $1,500,000.

The principal balance of this Note shall be payable on the date on which Maker consummates its initial business combination (the “Maturity

Date”). The principal balance may be prepaid at any time.

2.             Interest. No interest shall accrue on the unpaid principal balance of this Note.

3.             Application

of Payments. All payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under

this Note, including (without limitation) reasonable attorney’s fees, then to the payment in full of any late charges and finally

to the reduction of the unpaid principal balance of this Note.

4.             Conversion.

(a)        At

Payee’s option, on the Maturity Date in the event Maker consummates its initial business combination, Payee may elect to convert

all or any portion of the principal outstanding under this Note into that number of warrants (“Working Capital Warrants”)

equal to: (i) the portion of the principal amount of this Note being converted pursuant to this Section 4, divided by (ii) $0.90, rounded

up to the nearest whole number. Each Working Capital Warrant shall have the same terms and conditions as the warrants issued by Maker

pursuant to a private placement to Payee (the “Private Placement”), as described in the prospectus (the “Prospectus”)

for Maker’s initial public offering (the “IPO”) dated September 3, 2025 and filed with the U.S. Securities and

Exchange Commission, including the transfer restrictions applicable thereto. The Working Capital Warrants and the Class A ordinary shares

issuable upon exercise of such warrants, and any other equity security of Maker issued or issuable with respect to the foregoing by way

of a stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or reorganization,

shall be entitled to the registration rights set forth in that certain registration rights agreement between Maker and the parties thereto,

dated as of September 3, 2025.

(b)       Upon

any complete or partial conversion of the principal amount of this Note, (i) such principal amount shall be so converted and such converted

portion of this Note shall become fully paid and satisfied, (ii) Payee shall surrender and deliver this Note, duly endorsed, to Maker

or such other address which Maker shall designate against delivery of the Working Capital Warrants, (iii) Maker shall promptly deliver

a new duly executed Note to Payee in the principal amount that remains outstanding, if any, after any such conversion and (iv) in exchange

for all or any portion of the surrendered Note, Maker shall, within five (5) business days following receipt by Maker of Payee’s

election to convert this Note pursuant to this Section 4, deliver to Payee the Working Capital Warrants, which shall bear such legends

as are required in the opinion of counsel to Maker or by any other agreement between Maker and Payee and applicable state and federal

securities laws.

shall pay any and all issue and other taxes that may be payable with respect to any issue or delivery of the Working Capital Warrants

upon conversion of this Note pursuant hereto; provided, however, that Payee shall not be obligated to pay any transfer taxes

resulting from any transfer requested by Payee in connection with any such conversion.

(d)       The

Working Capital Warrants shall not be issued upon conversion of this Note unless such issuance and such conversion comply with all applicable

provisions of law. No fractional Working Capital Warrants shall be issued upon conversion of this Note. For the avoidance of doubt, in

the event that all principal on this Note has been paid in full on or prior to the Maturity Date, then Payee shall not be entitled to

convert any portion of this Note into Working Capital Warrants. Upon conversion of this Note in full, this Note shall be cancelled and

void without further action of Maker or Payee, and Maker shall be forever released from all its obligations and liabilities under this

Note.

Events of Default. The following shall constitute an event of default (“Event of Default”):

(a)        Failure

to Make Required Payments. Failure by Maker to pay the principal amount due pursuant to this Note within five (5) business days of

the date specified above.

(b)        Voluntary

Bankruptcy, Etc. The commencement by Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation

or other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian,

sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for

the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action

by Maker in furtherance of any of the foregoing.

(c)

Involuntary Bankruptcy, Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect

of Maker in an involuntary case under any applicable bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator,

assignee, custodian, trustee, sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the

winding-up or liquidation of its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive

days.

Remedies.

(a)

Upon the occurrence of an Event of Default specified in Section 5(a) hereof, Payee may, by written notice to Maker, declare this Note

to be due immediately and payable, whereupon the unpaid principal amount of this Note, and all other amounts payable thereunder, shall

become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby expressly

waived, anything contained herein or in the documents evidencing the same to the contrary notwithstanding.

(b)

Upon the occurrence of an Event of Default specified in Sections 5(b) and 5(c), the unpaid principal balance of this Note, and all other

sums payable with regard to this Note, shall automatically and immediately become due and payable, in all cases without any action on

the part of Payee.

7.             Waivers. Maker

and all endorsers and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest,

and notice of protest with regard to the Note, all errors, defects and imperfections in any proceedings instituted by Payee under the

terms of this Note, and all benefits that might accrue to Maker by virtue of any present or future laws exempting any property, real

or personal, or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or

providing for any stay of execution, exemption from civil process, or extension of time for payment; and Maker agrees that any real estate

that may be levied upon pursuant to a judgment obtained by virtue hereof, on any writ of execution issued hereon, may be sold upon any

such writ in whole or in part in any order desired by Payee.

8.             Unconditional

Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement

of the payment of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other party,

and shall not be affected in any manner by any indulgence, extension of time, renewal, waiver or modification granted or consented to

by Payee, and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect

to the payment or other provisions of this Note, and agrees that additional makers, endorsers, guarantors, or sureties may become parties

hereto without notice to Maker or affecting Maker’s liability hereunder.

9.             Notices. All notices, statements or other documents which are required or contemplated by this Note shall be: (i) in writing

and delivered personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission

to the address designated in writing, (ii) by facsimile to the number most recently provided to such party or such other address or fax

number as may be designated in writing by such party and (iii) by electronic mail, to the electronic mail address most recently provided

to such party or such other electronic mail address as may be designated in writing by such party. Any notice or other communication

so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the business day following receipt

of written confirmation, if sent by facsimile or electronic transmission, one (1) business day after delivery to an overnight courier

service or five (5) days after mailing if sent by mail.

10.           Construction. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF DELAWARE, WITHOUT REGARD TO CONFLICT

OF LAW PROVISIONS THEREOF.

11.          Severability. Any provision contained in this Note which is prohibited or unenforceable in any jurisdiction shall, as

to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions

hereof, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in

any other jurisdiction.

12.           Trust

Waiver. Notwithstanding anything herein to the contrary, Payee hereby waives any and all right, title, interest or claim

of any kind (“Claim”) in or to any distribution of or from the trust account in which a portion of the proceeds of

Maker’s initial public offering (the “IPO”) were deposited, as described in greater detail in the prospectus

filed with the SEC in connection with the IPO, and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any

Claim against the trust account for any reason whatsoever.

13.           Amendment; Waiver. Any amendment hereto or waiver of any provision hereof may be made with, and only with, the written

consent of the Maker and the Payee.

14.           Assignment. No

assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or otherwise)

without the prior written consent of the other party hereto and any attempted assignment without the required consent shall be void.

IN WITNESS WHEREOF,

Maker and Payee, intending to be legally bound hereby, have caused this Note to be duly executed by the undersigned as of the day and

year first above written.

Maker:

SPRING VALLEY ACQUISITION CORP. III

By:

/s/ Christopher Sorrells

Name: Christopher Sorrells

Title: Chief Executive Officer

Payee:

Spring Valley Acquisition iii sponsor, LLC

By:

/s/ Christopher Sorrells

Name: Christopher Sorrells

Title: Chief Executive Officer

[Signature Page to Promissory Note]

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- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

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dei_WrittenCommunications

Namespace Prefix:

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Balance Type:

Period Type:

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- Details

Name:

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- Details

Name:

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Namespace Prefix:

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