UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended September 30, 2020 for the transition period from to Commission File Number: 000-10436 L.B. Foster Company (Exact name of registrant as specified in its charter) Pennsylvania 25-1324733 (State of Incorporation) (I. R. S. Employer Identification No.) 415 Holiday Drive, Suite 100, Pittsburgh, Pennsylv ...