# EDGAR Filing Document

**Accession Number:** 0000352825
**File Stem:** 0000352825-26-000002
**Filing Date:** 2026-2
**Character Count:** 7205
**Document Hash:** 10a68cd30da1e4bd2160214404b17571
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000352825-26-000002.hdr.sgml**: 20260212

**ACCESSION NUMBER**: 0000352825-26-000002

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260211

**FILED AS OF DATE**: 20260212

**DATE AS OF CHANGE**: 20260212

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KASEL JOHN F
- **CENTRAL INDEX KEY:** 0001228393

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10436
- **FILM NUMBER:** 26626704

**MAIL ADDRESS:**
- **STREET 1:** 415 HOLIDAY DRIVE, SUITE 100
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15220
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FOSTER L B CO
- **CENTRAL INDEX KEY:** 0000352825
- **STANDARD INDUSTRIAL CLASSIFICATION:** WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 251324733
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 415 HOLIDAY DR
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15220
- **BUSINESS PHONE:** 4129283431

**MAIL ADDRESS:**
- **STREET 1:** 415 HOLIDAY DR
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15220

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KASEL JOHN F<br><sub>(Last) (First) (Middle)</sub><br>L.B. FOSTER COMPANY<br>415 HOLIDAY DRIVE, SUITE 100<br><sub>(Street)</sub><br>PITTSBURGH, PA 15220<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_President & Chief Exec Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>FOSTER L B CO [ FSTR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-02-11 |  | M |  | 1667<sup>(1)</sup> | A | $0 | 226354<sup>(2)(3)</sup> | D |  |
| Common Stock | 2026-02-11 |  | F |  | 829 | D | $31.54 | 225525<sup>(2)(3)</sup> | D |  |
| Common Stock |  |  |  |  |  |  |  | 13908 | I | L.B. Foster Company 401(k) Plan Shares |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Performance Stock Units | <sup>(4)</sup> |  |  |  |  |  |  | <sup>(4)</sup> | 2026-02-28 | Common Stock | 1667<sup>(4)</sup> |  | 1667 | D |  |
| Performance Stock Units | <sup>(4)</sup> | 2026-02-11 |  | M |  |  | 1667<sup>(1)</sup> | <sup>(4)</sup> | 2026-02-28 | Common Stock | 1667 | $31.54 | 0 | D |  |

---

### Footnotes:

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

(2) Includes 58,202 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 58.202 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

(3) Includes 7,632 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 7,632 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

(4) 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.

**Signature:** /s/ John F. Kasel by Judith Balog, attorney-in-fact  
**Date:** 2026-02-12

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**