Aron R. English - 31 Mar 2026 Form 4 Insider Report for FOSTER L B CO (FSTR)

Reporting relationship
10%+ Owner
Issuer ticker
FSTR
Reported as of
31 Mar 2026
Net transaction value
-$1,119,916
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
4
Accepted by SEC
02 Apr 2026, 20:28:40 UTC
Prior SEC filing
30 Mar 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Aron R. English

Key filing fact

Aron R. English filed Form 4 for FOSTER L B CO (FSTR) on 02 Apr 2026.

Key facts

  • This page summarizes Aron R. English's Form 4 filing for FOSTER L B CO (FSTR).
  • 2 reported transactions and 0 derivative rows are listed below.
  • Accepted by SEC: 02 Apr 2026, 20:28.

Change

  • Previous filing in this sequence was filed on 30 Mar 2026.
  • Current net transaction value: -$1,119,916.

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 (5)

CIK 0001770436 Primary reporting owner

English Aron R.

Relationship
10%+ Owner
Address
590 1ST AVE. S, UNIT C1, SEATTLE
Signature
/s/ Aron R. English
Signature date
02 Apr 2026
CIK 0001694297

22NW, LP

Relationship
10%+ Owner
Address
590 1ST AVE. S, UNIT C1, SEATTLE
Signature
22NW Fund, LP; By: 22NW Fund GP, LLC; By: /s/ Aron R. English, Manager
Signature date
02 Apr 2026
CIK 0001640809

22NW Fund, LP

Relationship
10%+ Owner
Address
590 1ST AVE. S, UNIT C1, SEATTLE
Signature
22NW, LP; By: 22NW GP, Inc.; By: /s/ Aron R. English, President and Sole Shareholder
Signature date
02 Apr 2026
CIK 0001770575

22NW Fund GP, LLC

Relationship
10%+ Owner
Address
590 1ST AVE. S, UNIT C1, SEATTLE
Signature
22NW Fund GP, LLC; By: /s/ Aron R. English, Manager
Signature date
02 Apr 2026
CIK 0001783663

22NW GP, Inc.

Relationship
10%+ Owner
Address
590 1ST AVE. S, UNIT C1, SEATTLE
Signature
22NW GP, Inc., By: /s/ Aron R. English, President and Sole Shareholder
Signature date
02 Apr 2026

Reported non-derivative transactions

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

FSTR transaction

Common Stock

Sale

Transaction value
$42,030
Shares
-1,500
Change %
-0.14%
Price
$28.02
Shares after
1,065,686
Date
31 Mar 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F3
FSTR transaction

Common Stock

Sale

Transaction value
$42,030
Shares
-1,500
Change %
-0.14%
Price
$28.02
Shares after
1,065,686
Date
31 Mar 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F3
FSTR transaction

Common Stock

Sale

Transaction value
$42,030
Shares
-1,500
Change %
-0.14%
Price
$28.02
Shares after
1,065,686
Date
31 Mar 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F3
FSTR transaction

Common Stock

Sale

Transaction value
$42,030
Shares
-1,500
Change %
-0.14%
Price
$28.02
Shares after
1,065,686
Date
31 Mar 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F3
FSTR transaction

Common Stock

Sale

Transaction value
$42,030
Shares
-1,500
Change %
-0.14%
Price
$28.02
Shares after
1,065,686
Date
31 Mar 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F3
FSTR transaction

Common Stock

Sale

Transaction value
$1,077,886
Shares
-38,431
Change %
-3.6%
Price
$28.05
Shares after
1,027,255
Date
01 Apr 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F2, F3
FSTR transaction

Common Stock

Sale

Transaction value
$1,077,886
Shares
-38,431
Change %
-3.6%
Price
$28.05
Shares after
1,027,255
Date
01 Apr 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F2, F3
FSTR transaction

Common Stock

Sale

Transaction value
$1,077,886
Shares
-38,431
Change %
-3.6%
Price
$28.05
Shares after
1,027,255
Date
01 Apr 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F2, F3
FSTR transaction

Common Stock

Sale

Transaction value
$1,077,886
Shares
-38,431
Change %
-3.6%
Price
$28.05
Shares after
1,027,255
Date
01 Apr 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F2, F3
FSTR transaction

Common Stock

Sale

Transaction value
$1,077,886
Shares
-38,431
Change %
-3.6%
Price
$28.05
Shares after
1,027,255
Date
01 Apr 2026
Ownership
By: 22NW Fund, LP
Footnotes
F1, F2, F3
FSTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
905
Date
31 Mar 2026
Ownership
Direct
Footnotes
F1
FSTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
905
Date
31 Mar 2026
Ownership
Direct
Footnotes
F1
FSTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
905
Date
31 Mar 2026
Ownership
Direct
Footnotes
F1
FSTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
905
Date
31 Mar 2026
Ownership
Direct
Footnotes
F1
FSTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
905
Date
31 Mar 2026
Ownership
Direct
Footnotes
F1
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Aron R. English is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 3 footnotes

Footnote F1

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.

Footnote F2

Represents a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.0000 to $28.3025, 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.

Footnote F3

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.

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .