FOSTER L B CO — Director's Dealing 2017

May 10, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FOSTER L B CO (FSTR)
CIK: 0000352825
Period of Report: 2017-05-09

Reporting Person: Vizi Bradley (Director, 10% Owner)
Reporting Person: Legion Partners, L.P. I (Director, 10% Owner)
Reporting Person: Legion Partners, L.P. II (Director, 10% Owner)
Reporting Person: Legion Partners Special Opportunities, L.P. II (Director, 10% Owner)
Reporting Person: Legion Partners Asset Management, LLC (Director, 10% Owner)
Reporting Person: Legion Partners, LLC (Director, 10% Owner)
Reporting Person: Legion Partners Holdings, LLC (Director, 10% Owner)
Reporting Person: Kiper Christopher S (Director, 10% Owner)
Reporting Person: White Raymond T. (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-09	Common Stock	A	1063	$12.93	Acquired	11398	Indirect
2017-05-09	Common Stock	J	1063	$12.93	Disposed	0	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1141750	Indirect
Common Stock	108856	Indirect
Common Stock	333617	Indirect

Footnotes

F1: This Form 4 is filed jointly by Legion Partners, L.P. I ("Legion Partners I"), Legion Partners, L.P. II ("Legion Partners II"), Legion Partners Special Opportunities, L.P. II ("Legion Partners Special II"), Legion Partners, LLC ("General Partner"), Legion Partners Asset Management, LLC ("Legion Partners Asset Management"), Legion Partners Holdings, LLC ("Legion Partners Holdings"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the "Reporting Persons"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2: Legion Partners I directly owns these shares of common stock ("Common Stock") of L.B. Foster Company (the "Issuer"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I.

F3: Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II.

F4: Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II.

F5: Legion Partners Asset Management directly owns these shares of Common Stock. Legion Partners Holdings is the sole member of Legion Partners Asset Management and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Asset Management.

F6: Represents a transfer of shares of common stock to an affiliated entity.