8-K

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): December 16, 2025

NuScale Power Corporation

(Exact name of registrant as specified in its charter)

Check the appropriate box below if the Form 8-K 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:

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 ☐

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 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

In connection with the approval by the stockholders of NuScale Power Corporation (the “Company”) at a special meeting of stockholders held on December 16, 2025 (the “Special Meeting”) as described in Item 5.07 below, the Company filed with the Secretary of State of the State of Delaware a Certificate of Amendment to the Company’s Certificate of Incorporation (as amended, the “Certificate of Incorporation”) to amend the Certificate of Incorporation to increase the number of authorized shares of the Company’s Class A common stock, par value $0.0001 per share (“Class A Common Stock”) from 332,000,000 to 662,000,000 shares (the “Authorized Share Increase Amendment”).

The foregoing description of the Authorized Share Increase Amendment is qualified in its entirety by reference to the full text thereof filed herewith as Exhibits 3.1and incorporated herein by reference.

Item 5.07 Submission of Matters to a Vote of Security Holders.

On December 16, 2025, the Company held the Special Meeting. As of the close of business on November 17, 2025, the record date for the Special Meeting (the “Record Date”), there were a total of 282,843,482 shares of Class A Common Stock and 19,881,099 shares of the Company’s Class B common stock, par value $0.0001 per share (together with the Class A Common Stock, the “Common Stock”) outstanding and eligible to vote. At the Special Meeting, 213,044,209 shares of Common Stock were represented in person or by proxy and, therefore, a quorum was present for the Special Meeting. A summary of the voting results for the following proposals, each of which is described in detail in the Company’s definitive proxy statement filed with the Securities and Exchange Commission on November 20, 2025, and first mailed to the Company’s stockholders on or about the date thereof, is set forth below.

1. Authorized Share Increase Amendment:

At the Special Meeting the Company’s stockholders approved the Authorized Share Increase Amendment as follows:

2. Adjournment Proposal:

Because the Authorized Share Increase Amendment was approved, the proposal to adjourn the Special Meeting, if necessary or appropriate, to solicit additional proxies if a quorum is not present or there are insufficient votes at the time of the Special Meeting to approve the Authorized Share Increase Amendment (the “Adjournment Proposal”), was rendered moot and was not called for a vote at the Special Meeting.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

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.

ex31-certificateofamendm

Exhibit 3.1 CERTIFICATE OF AMENDMENT OF THE RESTATED CERTIFICATE OF INCORPORATION OF NUSCALE POWER CORPORATION NuScale Power Corporation. (the “Corporation”), a corporation organized and existing under and by virtue of the provisions of the General Corporation Law of the State of Delaware (the “General Corporation Law”), does hereby certify as follows: 1. The current name of the Corporation is NuScale Power Corporation. 2. The original certificate of incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on April 29, 2022, as amended on May 31, 2023 and amended and restated on May 28, 2025 (the “Certificate of Incorporation”). 3. The amendments to the Certificate of Incorporation set forth in this Certificate of Amendment have been duly adopted and approved in accordance with the provisions of Section 242 of the General Corporation Law. 4. The first paragraph of Article SIXTH of the Certificate of Incorporation be and hereby is deleted in its entirety and the following is inserted in lieu thereof: Section 6.1 Authorized Stock. The total number of shares of all classes of stock that the Corporation shall have authority to issue is 842,000,000 shares, consisting of: (i) 841,000,000 shares of common stock, divided into (a) 662,000,000 shares of Class A common stock, with the par value of $0.0001 per share (the “Class A Common Stock”) and (b) 179,000,000 shares of Class B common stock, with the par value of $0.0001 per share (the “Class B Common Stock” and, together with Class A Common Stock, the “Common Stock”); and (ii) 1,000,000 shares of preferred stock, with the par value of $0.0001 per share (the “Preferred Stock”) 5. All other provisions of the Certificate of Incorporation shall remain in full force and effect. 6. This Certificate of Amendment, and the amendments effected hereby, shall become effective upon filing with the Secretary of State of the State of Delaware. [Signature Page Follows]

IN WITNESS WHEREOF, this Corporation has caused this Certificate of Amendment of the Restated Certificate of Incorporation to be signed by its Chief Executive Officer this 16th day of December, 2025. /s/ John L. Hopkins Name: John L. Hopkins Title: Chief Executive Officer