Sean M. Reilly - 01 Jun 2026 Form 4 Insider Report for FOSTER L B CO (FSTR)

Reporting relationship: SVP and CFO
Issuer ticker: FSTR
Reported as of: 01 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Jun 2026, 15:29:13 UTC
Prior SEC filing: 27 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Sean M. Reilly by Maribel Castro, attorney-in-fact

Key filing fact

Sean M. Reilly filed Form 4 for FOSTER L B CO (FSTR) on 03 Jun 2026.

Key facts

This page summarizes Sean M. Reilly's Form 4 filing for FOSTER L B CO (FSTR).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 03 Jun 2026, 15:29.

Change

Previous filing in this sequence was filed on 27 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001284955 Primary reporting owner

REILLY SEAN M

Relationship: SVP and CFO
Address: L.B. FOSTER COMPANY, 415 HOLIDAY DRIVE, SUITE 100, PITTSBURGH
Signature: /s/ Sean M. Reilly by Maribel Castro, attorney-in-fact
Signature date: 03 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FSTR transaction

Common Stock

Award

Transaction value
Shares: +895
Change %: +3.1%
Price: $0.000000^*
Shares after: 29,953
Date: 01 Jun 2026
Ownership: Direct
Footnotes: F1, F2, F3

FSTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,098
Date: 01 Jun 2026
Ownership: L.B. Foster Company 401(k) Plan Shares

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Award of 895 restricted stock units (RSUs) which are settled in stock upon vesting and generally will vest ratably over a three-year period on the first, second, and third anniversary of the date of the grant.

Footnote F2

Includes 2,174 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,174 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Footnote F3

Includes 492 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 492 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.