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) March 3, 2026

L.B. Foster Company

(Exact name of registrant as specified in its charter)

Pennsylvania

000-10436

25-1324733

(State or other jurisdiction of incorporation)

(Commission File Number)

(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,

15220

Pittsburgh,

Pennsylvania

(Zip Code)

(Address of principal executive offices)

(412) 928-3400

(Registrant’s telephone number, including area code)

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 (see General Instruction A.2. below):

☐

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

Common Stock, Par Value $0.01

FSTR

Nasdaq Global Select Market

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 52.02 ~~Departure~~ Results of ~~Directors~~Operations orand ~~Certain~~Financial ~~Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.~~Condition

~~L.B.~~On ~~Foster Company (the “Company”) announced that~~March 3, ~~on December 12~~2026, ~~2025, Mr~~L. ~~Alexander~~ B. ~~Jones~~Foster ~~offered~~Company ~~his resignation to the Board of Directors~~ (~~the~~ “~~Board~~Company”), ~~and~~issued ~~the~~a ~~Board~~press ~~accepted~~release ~~the~~announcing ~~resignation on December 15, 2025. Mr. Jones’s decision does not involve any disagreement on any matter relating to~~ the Company’s ~~operations,~~results ~~policies, or practices, but rather is in connection with the expiration~~ of ~~the~~operations ~~Cooperation~~for ~~Agreement between~~ the ~~Company~~fourth ~~and~~quarter ~~22NW Fund, LP, 22NW LP, 22NW Fund GP, LLC, 22NW GP, Inc. (collectively, “22NW”), Aron R. English, Bryson O. Hirai-Hadley,~~ and ~~Alexander~~fiscal B.year ~~Jones~~ended ~~in January 2026. In connection with the acceptance of Mr. Jones’s resignation, on~~ December 15 31, 2025,. A ~~the~~copy ~~Board approved the reduction~~ of ~~the~~that ~~size~~press ofrelease ~~the~~is ~~Board~~furnished ~~from~~with ~~seven~~this ~~(7)~~report ~~members~~as toExhibit ~~six (6) members effective immediately~~99.1.

~~Mr.~~The ~~John~~information ~~Kasel,~~contained ~~CEO~~in ofthis ~~the~~Current ~~Company,~~Report ~~remarked,~~shall not be deemed to be “Onfiled” ~~behalf~~for the purposes of Section 18 of the ~~Board~~Securities and Exchange Act of 1934, weas ~~convey~~amended, ~~our~~or ~~appreciation~~otherwise ofsubject to the ~~support~~liabilities of ~~22NW~~that ~~and~~section, ~~the~~nor ~~contributions~~shall ofsuch ~~Mr.~~information ~~Jones~~be todeemed incorporated by reference in any filing under the ~~Board~~Securities ~~over~~Act ~~his~~of ~~tenure~~1933, ~~including~~as ~~his~~amended, ~~expertise~~except onas ~~capital~~shall ~~allocation~~be ~~and~~expressly ~~shareholder~~set ~~perspective~~forth by specific reference in such filing.”

Mr. Aron English, founder of 22NW, commented, “22NW has been pleased with the performance of its investment in the Company and remains supportive of its Board of Directors and management team. As our mutually beneficial Cooperation Agreement comes to an end, we look forward to the Company’s continued success.”

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit Number			Description
*104			Cover Page Interactive Data File (embedded within the Inline XBRL document)
*99.1			Press Release dated March 3, 2026, of L.B. Foster Company.
*104			Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

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.

		L.B. FOSTER COMPANY
		(Registrant)
Date:	~~December~~March 153, ~~2025~~2026	/s/ ~~Patrick~~William JM. ~~Guinee~~Thalman
		Patrick J. Guinee
		William M. Thalman
		Executive Vice President,
		Executive Vice President and
		General Counsel, and Corporate Secretary
		Chief Financial Officer
		(Duly Authorized Officer of Registrant)

Filing Compare · FOSTER L B CO