NUCOR CORP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐

Check the appropriate box:

NUCOR CORPORATION

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

1915 Rexford Road Charlotte, North Carolina 28211 Phone 704.366.7000

2026 PROXY STATEMENT AND NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

WHEN: Thursday, May 14, 2026 at 9:00 a.m. Eastern Time WHERE: Live audio webcast at www.virtualshareholdermeeting.com/NUE2026 Stockholders as of the close of business on March 16, 2026 are entitled to receive notice of, and to vote at, the Annual Meeting by visiting www.virtualshareholdermeeting.com/NUE2026.

AGENDA: • To elect the eight directors nominated by the Board of Directors • To ratify the appointment of PricewaterhouseCoopers LLP to serve as Nucor’s independent registered public accounting firm for 2026 • To approve, on an advisory basis, Nucor’s named executive officer compensation in 2025 • To conduct such other business as may properly come before the Annual Meeting or any adjournment or postponement thereof

This year, we will again be using the Securities and Exchange Commission rule that allows us to provide proxy materials to our stockholders via the Internet. By doing so, most of our stockholders will only receive a notice of the Annual Meeting containing instructions on how to access the proxy materials via the Internet and to vote online, by telephone or by mail. If you would like to receive a paper ore-mail copy of the proxy materials, you should follow the instructions in the notice for requesting a copy.

Nucor has designed the format of the Annual Meeting to ensure that stockholders are afforded the same rights and opportunities to participate as they would have at anin-person meeting, using online tools and control numbers to ensure stockholder access and participation. Individuals interested in attending the Annual Meeting who do not have a control number may register as a guest on the virtual meeting site. Only stockholders registered with a control number will be able to vote or to submit questions during the meeting.

VOTE USING ANY OF THE FOLLOWING METHODS:

Internet: Cast your vote at www.proxyvote.com using your 16-digit control number.

Telephone: Follow the instructions on your proxy card, voting instruction form or notice provided, or in the instructions you receive by e-mail.

Mail: Complete, sign, date and return the proxy card and/or voting instruction form.

Virtually: To participate in the Annual Meeting via live audio webcast and cast your vote, you will need the 16-digit control number, which can be found on the proxy card, voting instruction form or notice provided, or in the instructions that you receive by e-mail. If you hold your shares in the name of a broker, bank, trustee or other nominee, you may contact your broker, bank, trustee or other nominee for assistance with your control number.

By order of the Board of Directors,

A. Rae Eagle

Vice President and Corporate Secretary

March 27, 2026

Important Notice Regarding the Availability of Proxy Materials

for the Annual Meeting of Stockholders To Be Held on May 14, 2026

The 2026 Proxy Statement and Notice of Annual Meeting of Stockholders and the

2025 Annual Report to Stockholders are available at www.proxyvote.com.

Dear fellow stockholders,

Thank you for your investment in Nucor and the confidence you place in our team. Your support empowers us to pursue our mission to Grow the Core, Expand Beyond and Live Our Culture — a mission rooted in creating sustainable long-term value for our stockholders, customers, teammates and the communities we serve.

Before you vote, I’d like to share several important perspectives that define where Nucor stands today and where we are heading.

On behalf of the Board of Directors and our approximately 33,000 teammates, thank you for your support. We ask for your vote in favor of the items described in this Proxy Statement, and we welcome your feedback throughout the year.

Sincerely, Leon J. Topalian Chair and Chief Executive Officer

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