FSTR

fstr-202603030000352825FALSE00003528252026-03-032026-03-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) March 3, 2026

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On March 3, 2026, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the fourth quarter and fiscal year ended December 31, 2025. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below. Exhibit Index

Exhibit NumberDescription *99.1Press Release dated March 3, 2026, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:March 3, 2026/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202511030000352825FALSE00003528252025-11-032025-11-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) November 3, 2025

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On November 3, 2025, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the third quarter ended September 30, 2025. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated November 3, 2025 of L.B. Foster Company.

*104Cover Page Interactive Data File (embedded within the Inline XBRL document)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:November 3, 2025/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202508110000352825FALSE00003528252025-08-112025-08-11

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) August 11, 2025

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On August 11, 2025, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the second quarter ended June 30, 2025. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated August 11, 2025 of L.B. Foster Company.

*104Cover Page Interactive Data File (embedded within the Inline XBRL document)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:August 11, 2025/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202503040000352825FALSE00003528252025-03-042025-03-04

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) March 4, 2025

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On March 4, 2025, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the fourth quarter ended December 31, 2024. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 8.01     Other Events

On March 3, 2025, the Company’s Board of Directors authorized the repurchase of up to $40,000,000 of the Company’s common stock in open market transactions and/or 10b5-1 trading plans through February 29, 2028. Any repurchases will be subject to the Company’s liquidity, including availability of borrowings and covenant compliance under its revolving credit facility, and other capital needs of the business.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below. Exhibit Index

Exhibit NumberDescription *99.1Press Release dated March 4, 2025, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:March 4, 2025/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202411070000352825FALSE00003528252024-11-072024-11-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) November 7, 2024

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On November 7, 2024, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the third quarter ended September 30, 2024. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated November 7, 2024, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:November 7, 2024/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202408060000352825FALSE00003528252024-08-062024-08-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) August 6, 2024

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On August 6, 2024, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the second quarter ended June 30, 2024. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 8.01    Other Events

On August 5, 2024, the Board of Directors approved the modification of the Company’s stock repurchase program. The modifications include revising the repurchase program expiration date from February 2026 to February 2025. Additionally, the Board of Directors removed the restriction which previously limited repurchases to $5,000,000 in any trailing 12-month period. The authorized repurchase amount was unchanged at $15,000,000. As of June 30, 2024, the Company has repurchased stock of $4,021,000, with $10,979,000 of the original $15,000,000 authorized remaining. Any repurchases will continue to be subject to the Company’s liquidity, including availability of borrowings and covenant compliance under its revolving credit facility, and other capital needs of the business.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated August 6, 2024, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:August 6, 2024/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202405070000352825FALSE00003528252024-05-072024-05-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 7, 2024

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On May 7, 2024, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the first quarter ended March 31, 2024. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated May 7, 2024, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:May 7, 2024/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202403050000352825FALSE00003528252024-03-052024-03-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) March 5, 2024

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On March 5, 2024, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the fourth quarter ended December 31, 2023. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated March 5, 2024, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:March 5, 2024/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202311070000352825FALSE00003528252023-11-072023-11-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) November 7, 2023

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On November 7, 2023, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the third quarter ended September 30, 2023. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated November 7, 2023, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:November 7, 2023/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202308080000352825FALSE00003528252023-08-082023-08-08

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) August 8, 2023

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On August 8, 2023, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the second quarter ended June 30, 2023. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated August 8, 2023, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:August 8, 2023/s/ William M. Thalman William M. Thalman Executive Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202305090000352825FALSE00003528252023-05-092023-05-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 9, 2023

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On May 9, 2023, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the first quarter ended March 31, 2023. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated May 9, 2023, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:May 9, 2023/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202303060000352825FALSE00003528252023-03-062023-03-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) March 6, 2023

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On March 6, 2023, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the fourth quarter ended December 31, 2022. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 8.01     Other Events

On March 3, 2023, the Company’s Board of Directors authorized the repurchase of up to $15,000,000 of the Company’s common stock in open market transactions and/or 10b5-1 trading plans through February 2026. Repurchases are limited to up to $5,000,000 in any trailing 12-month period, with unused amounts carrying forward to future periods through the end of the authorization. Any repurchases will be subject to the Company’s liquidity, including availability of borrowings and covenant compliance under its revolving credit facility, and other capital needs of the business.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated March 6, 2023, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:March 6, 2023/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202211080000352825FALSE00003528252022-11-082022-11-08

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) November 8, 2022

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On November 8, 2022, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the third quarter ended September 30, 2022. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated November 8, 2022, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:November 8, 2022/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202208090000352825FALSE00003528252022-08-092022-08-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) August 9, 2022

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On August 9, 2022, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the second quarter ended June 30, 2022. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated August 9, 2022, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:August 9, 2022/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202205100000352825FALSE00003528252022-05-102022-05-10

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 10, 2022

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On May 10, 2022, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the first quarter ended March 31, 2022. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated May 10, 2022, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:May 10, 2022/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202203010000352825FALSE00003528252022-03-012022-03-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) March 1, 2022

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On March 1, 2022, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the fourth quarter ended December 31, 2021. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index Exhibit NumberDescription *99.1Press Release dated March 1, 2022, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:March 1, 2022/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202111020000352825FALSE00003528252021-11-022021-11-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) November 2, 2021

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On November 2, 2021, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the third quarter ended September 30, 2021. A copy of that press release is furnished with this report as Exhibit 99.1. The slides accompanying the webcast scheduled for November 2, 2021 at 11:00 AM Eastern Standard Time are available on the Company website at www.lbfoster.com under the Investor Relations tab.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated November 2, 2021, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:November 2, 2021/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202108030000352825FALSE00003528252021-08-032021-08-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) August 3, 2021

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On August 3, 2021, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the second quarter ended June 30, 2021. A copy of that press release is furnished with this report as Exhibit 99.1. The slides accompanying the webcast scheduled for August 3, 2021 at 11:00 AM Eastern Standard Time are available on the Company website at www.lbfoster.com under the Investor Relations tab.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated August 3, 2021, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:August 3, 2021/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202105030000352825FALSE00003528252021-05-032021-05-0300003528252020-07-012020-07-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 3, 2021

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On May 3, 2021, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the first quarter ended March 31, 2021. A copy of that press release is furnished with this report as Exhibit 99.1. The slides accompanying the webcast scheduled for May 4, 2021 at 8:30 AM Eastern Standard Time are available on the Company website at www.lbfoster.com under the Investor Relations tab.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated May 3, 2021, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:May 3, 2021/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)

fstr-202103020000352825FALSE00003528252021-03-022021-03-0200003528252020-07-012020-07-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) March 2, 2021

L.B. Foster Company (Exact name of registrant as specified in its charter)

Pennsylvania000-1043625-1324733 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

415 Holiday Drive, Suite 100,15220 Pittsburgh,Pennsylvania(Zip Code) (Address of principal executive offices)

(412) 928-3400 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, Par Value $0.01FSTRNASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Operations and Financial Condition

On March 2, 2021, L.B. Foster Company (“Company”) issued a press release announcing the Company’s results of operations for the fourth quarter ended December 31, 2020. A copy of that press release is furnished with this report as Exhibit 99.1.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Item 9.01     Financial Statements and Exhibits

(d)    Exhibits

See Exhibit Index below.

Exhibit Index

Exhibit NumberDescription *99.1Press Release dated March 2, 2021, of L.B. Foster Company.

*104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Exhibits marked with an asterisk are filed herewith.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

L.B. FOSTER COMPANY

(Registrant)

Date:March 2, 2021/s/ William M. Thalman William M. Thalman Senior Vice President and Chief Financial Officer (Duly Authorized Officer of Registrant)