Robert Ness - 13 Feb 2026 Form 4/A - Amendment Insider Report for FOSTER L B CO (FSTR)

Role: SVP, Precast Concrete Products
Signature: Robert Ness by Judith Balog, attorney-in-fact
Issuer symbol: FSTR
Transactions as of: 13 Feb 2026
Net transactions value: $0
Form type: 4/A - Amendment
Filing time: 09 Mar 2026, 16:02:24 UTC
Date Of Original Report: 18 Feb 2026
Previous filing: 27 May 2025
Next filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Ness Robert	SVP, Precast Concrete Products	L.B. FOSTER COMPANY, 415 HOLIDAY DRIVE, SUITE 100, PITTSBURGH	Robert Ness by Judith Balog, attorney-in-fact	09 Mar 2026	0001888828

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	FSTR	Common Stock	Tax liability		-548	-1.8%	$31.63^*	29,466	13 Feb 2026	Direct	F1, F2, F3
transaction	FSTR	Common Stock	Tax liability		-850	-2.9%	$31.63^*	28,616	14 Feb 2026	Direct	F2, F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This amended Form 4 was filed to correct the number of shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2024-2026 LTIP awarded on 5/23/24.
F2	Includes 1,272 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 1,272 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.
F3	Includes 7,937 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 7,937 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.
F4	This amended Form 4 was filed to also correct the number of shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2023-2025 LTIP awarded on 2/14/23.