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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Vizi Bradley (Last) (First) (Middle) 9401 WILSHIRE BLVD, SUITE 705 (Street) BEVERLY HILLS CA 90212 (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) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 09/29/2017
	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)(2)								1,141,750	I	Legion Partners, L.P. I(3)(4)
Common Stock(1)(2)								108,856	I	Legion Partners, L.P. II(5)
Common Stock(1)(2)								333,617	I	Legion Partners Special Opportunities L.P. II(6)
Common Stock(1)(2)								11,398	I	Legion Partners Asset Management, LLC(7)
Common Stock(1)(2)	09/29/2017		A(8)		549	A	$22.75	0	D(8)

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* Vizi Bradley (Last) (First) (Middle) 9401 WILSHIRE BLVD, SUITE 705 (Street) BEVERLY HILLS CA 90212 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Legion Partners, L.P. I (Last) (First) (Middle) 9401 WILSHIRE BLVD. SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* Legion Partners, L.P. II (Last) (First) (Middle) 9401 WILSHIRE BLVD. SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* Legion Partners Special Opportunities, L.P. II (Last) (First) (Middle) 9401 WILSHIRE BLVD. SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* Legion Partners, LLC (Last) (First) (Middle) 9401 WILSHIRE BLVD., SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* Legion Partners Asset Management, LLC (Last) (First) (Middle) 9401 WILSHIRE BLVD., SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* Legion Partners Holdings, LLC (Last) (First) (Middle) 9401 WILSHIRE BLVD., SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* Kiper Christopher S (Last) (First) (Middle) 9401 WILSHIRE BLVD, SUITE 705 (Street) BEVERLY HILLS CA 90212 (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* White Raymond T. (Last) (First) (Middle) 9401 WILSHIRE BLVD. SUITE 705 (Street) BEVERLY HILLS CA 90212 (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 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").

2. As of the transaction date set forth above, 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.

3. 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 of the transaction date set forth above.

4. 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, as of the transaction date set forth above.

5. 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 of the transaction date set forth above. 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, as of the transaction date set forth above.

6. 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 of the transaction date set forth above. 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, as of the transaction date set forth above.

7. 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 of the transaction date set forth above. 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, as of the transaction date set forth above.

8. 2017 Director Equity Award; Includes 549 shares of deferred stock units.

	/s/ Bradley S. Vizi	10/04/2017
	Legion Partners, L.P. I By: Legion Partners Asset Management, LLC, By: /s/ Bradley S. Vizi	10/04/2017
	Legion Partners, L.P. II By: Legion Partners Asset Management, LLC, By: /s/ Bradley S. Vizi	10/04/2017
	Legion Partners Special Opportunities, L.P. II, By: Legion Partners Asset Management, LLC, By: /s/ Bradley S. Vizi	10/04/2017
	Legion Partners, LLC, By: Legion Partners Holdings, LLC, By: /s/ Bradley S. Vizi	10/04/2017
	Legion Partners Asset Management, LLC, By: /s/ Bradley S. Vizi	10/04/2017
	Legion Partners Holdings, LLC, By: /s/ Bradley S. Vizi	10/04/2017
	/s/ Christopher S. Kiper	10/04/2017
	/s/ Raymond T. White	10/04/2017
	** Signature of Reporting Person	Date
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.