FOSTER L B CO

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

(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):

L.B. FOSTER COMPANY 415 Holiday Drive, Suite 100 Pittsburgh, Pennsylvania 15220

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

TO BE HELD ON MAY 22, 2025

To Our Shareholders:

L.B. Foster Company (the “Company”) will hold its Annual Meeting of Shareholders in a virtual-only format on Thursday, May 22, 2025, at 8:30 AM, Eastern Daylight Time (the “Annual Meeting” or the “Meeting”). You will not be able to attend the Meeting in person at a physical location. We believe that hosting a virtual Annual Meeting enables greater shareholder attendance and participation from any location around the world, improves meeting efficiency and our ability to communicate effectively with our shareholders, and reduces the cost and environmental impact of the Meeting. To be admitted to the Annual Meeting atwww.virtualshareholdermeeting.com/FSTR2025 you must enter the control number found on your proxy card, voting instruction form, or Notice of Internet Availability of Proxy Materials (the “Notice”) you previously received. Once admitted to the Meeting, you may vote during the Annual Meeting, submit questions, and view the list of shareholders entitled to vote by following the instructions available on the Meeting website. The Meeting will be held for the purposes of:

Shareholders will also be asked to consider and act upon such other business that properly comes before the Annual Meeting.

Shareholders are cordially invited to attend the Annual Meeting. Only holders of record of Company common stock at the close of business on March 20, 2025 will be entitled to vote at the Annual Meeting or at any adjournment or postponement thereof.

U.S. Securities and Exchange Commission rules allow companies to furnish proxy materials to their shareholders over the Internet. This process expedites shareholder receipt of proxy materials and lowers the cost of our Annual Meeting. On or about April 11, 2025, we released to our shareholders a Notice containing instructions on how to access our 2025 Proxy Statement and 2024 Annual Report and how to cast your vote. The Notice also includes instructions on how to receive a paper copy of the Annual Meeting materials.

Your vote is important. Whether you plan to attend the Annual Meeting or not, we hope you will vote your shares as soon as possible. Please sign, date, and return your proxy card or voting instruction form or vote by telephone or via the Internet; instructions are included on the Notice, proxy card, and voting instruction form.

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