UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

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Filed by a party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

WORTHINGTON STEEL, INC.

(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):

☒ No fee required

☐ Fee paid previously with preliminary materials

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

	Your Vote Counts!
	WORTHINGTON STEEL, INC.
	2025 Annual Meeting of Shareholders
	Vote by September 23, 2025 at 11:59 p.m., EDT or at the Annual Meeting
	on September 24, 2025 at 8:30 a.m., EDT
WORTHINGTON STEEL, INC.      C/O BROADRIDGE      P.O. BOX 1342      BRENTWOOD, NY 11717

	V77404-P36476

You invested in WORTHINGTON STEEL, INC. and it’s time to vote!

You have the right to vote on proposals being presented at the Annual Meeting of Shareholders. This is an important notice regarding the availability of proxy materials for the shareholder meeting to be held on September 24, 2025.

Get informed before you vote

View Worthington Steel, Inc.’s letter to shareholders, Notice of Annual Meeting of Shareholders, Proxy Statement, 2025 Annual Report and the form of proxy online OR you can receive a free paper or email copy of the material(s) by requesting prior to September 10, 2025. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.

*Please check the meeting materials for any special requirements for meeting attendance. You will need to have the control number (indicated above) to vote at the Annual Meeting of Shareholders.

Vote at www.ProxyVote.com

THIS IS NOT A VOTABLE BALLOT

This is an overview of the proposals being presented at the

upcoming Annual Meeting of Shareholders of Worthington

Steel, Inc. Please follow the instructions on the reverse side to

vote on these important matters.

Voting Items	Board Recommends
1.  Elect three directors, each to serve for a term of three years to expire at the Company’s 2028 Annual Meeting of Shareholders:
Nominees:
1a.   Jon J. Bowsher	For
1b.  Charles M. Chiappone	For
1c.   Mary Schiavo	For
2.  Approve, on an advisory basis, a resolution to approve the compensation of the Company’s named executive officers.	For
3.  Ratify the selection of KPMG LLP as the Company’s independent registered public accounting firm for the fiscal year ending May 31, 2026.	For
NOTE: In their discretion, the persons named as proxies will be authorized to vote on such other business as may properly  come before the Annual Meeting of Shareholders.

Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”.

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