William M. Thalman - 11 Feb 2026 Form 4/A - Amendment Insider Report for FOSTER L B CO (FSTR)

Reporting relationship: EVP & CFO
Issuer ticker: FSTR
Reported as of: 11 Feb 2026
Net transaction value: -$78,345
SEC form: 4/A - Amendment
Accepted by SEC: 20 Feb 2026, 14:10:06 UTC
Original report date: 12 Feb 2026
Prior SEC filing: 27 May 2025
Next SEC filing: 09 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ William M. Thalman by Judith Balog, attorney-in-fact

Key filing fact

William M. Thalman filed Form 4/A - Amendment for FOSTER L B CO (FSTR) on 20 Feb 2026.

Key facts

This page summarizes William M. Thalman's Form 4/A - Amendment filing for FOSTER L B CO (FSTR).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 20 Feb 2026, 14:10.

Change

Previous filing in this sequence was filed on 27 May 2025.
Current net transaction value: -$78,345.

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/A - Amendment disclosures.

View source filing

Reporting Owners (1)

CIK 0001104808 Primary reporting owner

THALMAN WILLIAM M

Relationship: EVP & CFO
Address: L.B. FOSTER COMPANY, 415 HOLIDAY DRIVE, SUITE 100, PITTSBURGH
Signature: /s/ William M. Thalman by Judith Balog, attorney-in-fact
Signature date: 20 Feb 2026

Reported non-derivative transactions

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

FSTR transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +1,667
Change %: +2.3%
Price: $0.000000
Shares after: 75,567
Date: 11 Feb 2026
Ownership: Direct
Footnotes: F1, F2, F3

FSTR transaction

Common Stock

Tax liability

Transaction value: $25,768
Shares: -817
Change %: -1.1%
Price: $31.54
Shares after: 74,750
Date: 11 Feb 2026
Ownership: Direct
Footnotes: F2, F3, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FSTR transaction Derivative

Performance Stock Units

Options Exercise

Transaction value: $52,577
Shares: -1,667
Change %: -100%
Price: $31.54
Shares after: 0
Date: 11 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,667
Exercise price
Footnotes: F1, F5

FSTR holding Derivative

Performance Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,667
Date: 11 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,667
Exercise price
Footnotes: F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

This amount represents 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

Footnote F2

Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Footnote F3

Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Footnote F4

This amended Form 4 was filed to correct the number of shares withheld to pay taxes applicable to 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

Footnote F5

Performance-based stock unit award of 3,333 shares was granted on 3/31/2021 and expires on 02/28/2026, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, was earned on 4/05/2024. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30-day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company.