22NW Fund trims FOSTER L B CO (FSTR) stake with 5,124-share sale

Rhea-AI Filing Summary

FOSTER L B CO major holder 22NW Fund, LP reported a small open-market sale of Common Stock. On March 4, 2026, 22NW Fund, LP, part of a group including Aron English and related entities, sold 5,124 shares at a weighted average price of $31.988 per share.

The sale occurred in multiple trades between $31.50 and $32.125 per share. After this transaction, the filing shows 1,185,922 shares held indirectly through 22NW Fund, LP and 905 shares held directly. The reporting persons may be deemed to beneficially own these shares only to the extent of their pecuniary interest.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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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^*

English Aron R.

(Last) (First) (Middle)

590 1ST AVE. S

UNIT C1

(Street)

SEATTLE WA 98104

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
FOSTER L B CO [ FSTR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock(1)	03/04/2026		S		5,124	D	$31.988(2)	1,185,922	I	By: 22NW Fund, LP(3)
Common Stock(1)								905	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

English Aron R.

(Last) (First) (Middle)

590 1ST AVE. S

UNIT C1

(Street)

SEATTLE WA 98104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

22NW, LP

(Last) (First) (Middle)

590 1ST AVE. S

UNIT C1

(Street)

SEATTLE WA 98104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

22NW Fund, LP

(Last) (First) (Middle)

590 1ST AVE. S

UNIT C1

(Street)

SEATTLE WA 98104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

22NW Fund GP, LLC

(Last) (First) (Middle)

590 1ST AVE. S

UNIT C1

(Street)

SEATTLE WA 98104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

22NW GP, Inc.

(Last) (First) (Middle)

590 1ST AVE. S

UNIT C1

(Street)

SEATTLE WA 98104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. This Form 4 is filed jointly by 22NW Fund, LP ("22NW Fund"), 22NW, LP ("22NW"), 22NW Fund GP, LLC ("22NW GP"), 22NW GP, Inc. ("22NW Inc.") and Aron English (collectively, the "Reporting Persons"). Each of the Reporting Persons may be deemed to be a member of a Section 13(d) group that collectively beneficially owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

2. Represents a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.5000 to $32.1250, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.

3. Securities owned directly by 22NW Fund. As the investment manager to 22NW Fund, 22NW may be deemed to beneficially own the securities owned directly by 22NW Fund. As the general partner of 22NW Fund, 22NW GP may be deemed to beneficially own the securities owned directly by 22NW Fund. As the general partner of 22NW, 22NW Inc. may be deemed to beneficially own the securities owned directly by 22NW Fund. Mr. English, as the Portfolio Manager of 22NW, Manager of 22NW GP and President and sole shareholder of 22NW Inc., may be deemed to beneficially own the securities owned directly by 22NW Fund.

	/s/ Aron R. English	03/06/2026
	22NW Fund, LP; By: 22NW Fund GP, LLC; By: /s/ Aron R. English, Manager	03/06/2026
	22NW, LP; By: 22NW GP, Inc.; By: /s/ Aron R. English, President and Sole Shareholder	03/06/2026
	22NW Fund GP, LLC; By: /s/ Aron R. English, Manager	03/06/2026
	22NW GP, Inc., By: /s/ Aron R. English, President and Sole Shareholder	03/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did 22NW Fund report in FOSTER L B CO (FSTR)?

22NW Fund, LP reported selling 5,124 shares of FOSTER L B CO Common Stock in the open market at a weighted average price of $31.988 per share on March 4, 2026, as part of a group that owns over 10% of the company.

At what prices were the FSTR shares sold by 22NW Fund on March 4, 2026?

The 5,124 FOSTER L B CO shares were sold at prices ranging from $31.50 to $32.125 per share, with a weighted average sale price of $31.988. These trades were executed as multiple open-market transactions on the same trading day.

How many FOSTER L B CO (FSTR) shares does 22NW Fund report holding after the sale?

After the March 4, 2026 transaction, the filing lists 1,185,922 shares of FOSTER L B CO Common Stock held indirectly through 22NW Fund, LP, plus an additional 905 shares held directly, reflecting the group’s remaining reported ownership position.

Who are the reporting persons in the latest FSTR Form 4 filing?

The Form 4 identifies 22NW Fund, LP, 22NW, LP, 22NW Fund GP, LLC, 22NW GP, Inc., and Aron English as reporting persons, who may be deemed part of a Section 13(d) group beneficially owning more than 10% of FOSTER L B CO.

Do the FSTR reporting persons claim full beneficial ownership of the reported shares?

The reporting persons disclaim beneficial ownership of the FOSTER L B CO securities reported, except to the extent of their pecuniary interest. The filing explains that certain entities may be deemed to beneficially own shares held directly by 22NW Fund, LP through their respective roles.