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THALMAN WILLIAM M

Disclosed activity across 1 company

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42082
SEC CIK
0001104808

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
FOSTER L B COFSTR · Entity 5689EVP & COOJune 01, 2026June 03, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

FOSTER L B CO

Report date June 01, 2026 · Filed June 03, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect79,882 Reported balance After 2026-06-01 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2026-06-01 · Grant · Acquired 1,128 · Balance 79,882

F1: Award of 1,128 restricted stock units (RSUs) which are settled in stock upon vesting and generally will vest ratably over a three-year period on the first, second, and third anniversary of the date of the grant.

F2: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

F3: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Filing footnotes · ownership attribution and instrument terms

F1: Award of 1,128 restricted stock units (RSUs) which are settled in stock upon vesting and generally will vest ratably over a three-year period on the first, second, and third anniversary of the date of the grant.

F2: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

F3: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

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Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
June 01, 2026 Filed Jun 3, 2026 19:32 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 1,128 $0.00 $0.00
Disclosure

SEC source: 0001104808-26-000014 · wk-form4_1780515136.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,882

F1 · shares: Award of 1,128 restricted stock units (RSUs) which are settled in stock upon vesting and generally will vest ratably over a three-year period on the first, second, and third anniversary of the date of the grant.

F2 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

F3 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Read SEC document
May 22, 2026 Filed May 27, 2026 19:30 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,178 $38.11 $44,893.58
Disclosure

SEC source: 0001104808-26-000012 · wk-form4_1779910227.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,754

F1 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2025-2027 LTIP awarded on 5/22/25.

F2 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

F3 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 21:16 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 11,746 $31.13 $365,594.25
Disclosure

SEC source: 0001104808-26-000008 · wk-form4_1771881409.xml · nonDerivative · entry 5

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,947

F9 · shares: Shares withheld to pay taxes upon the vesting and settlement of all earned performance shares related to the 2023-2025 LTIP awarded on 2/14/2023.

F5 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

F7 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 21:16 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 6,297 $0.00 $0.00
Disclosure

SEC source: 0001104808-26-000008 · wk-form4_1771881409.xml · nonDerivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,693

F8 · shares: Award of restricted stock units (RSUs), which are settled in stock upon vesting, and generally will vest ratably over a three-year period on the first, second, and third anniversary of the date of grant.

F2 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F5 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

F7 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 21:16 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 1,358 $0.00 $0.00
Disclosure

SEC source: 0001104808-26-000008 · wk-form4_1771881409.xml · nonDerivative · entry 3

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,396

F6 · shares: Represents the number of Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025 upon certification of performance results by the Compensation Committee at 11.2% for the annual period ended December 31, 2025. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

F2 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F5 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

F7 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 21:16 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 3,651 $0.00 $0.00
Disclosure

SEC source: 0001104808-26-000008 · wk-form4_1771881409.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,038

F4 · shares: Represents the number of Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024 upon certification of performance results by the Compensation Committee at 39.5% for the annual period ended December 31, 2025. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

F2 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F5 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 21:16 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 8,365 $0.00 $0.00
Disclosure

SEC source: 0001104808-26-000008 · wk-form4_1771881409.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,387

F1 · shares: Represents the number of shares of common stock resulting from Performance Share Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023 upon certification of performance results by the Compensation Committee at 47.2% for the annual period ended December 31, 2025.

F2 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Mar 9, 2026 19:50 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 11,746 $31.13 $365,594.25
Disclosure

SEC source: 0000352825-26-000022 · wk-form4a_1773085847.xml · nonDerivative · entry 5

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,932

F10 · shares: Shares withheld to pay taxes upon the vesting and settlement of all earned performance shares related to the 2023-2025 LTIP awarded on 2/14/2023.

F6 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

F8 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Mar 9, 2026 19:50 UTC Amendment FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 6,297 $0.00 $0.00
Disclosure

SEC source: 0000352825-26-000022 · wk-form4a_1773085847.xml · nonDerivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,678

F9 · shares: Award of restricted stock units (RSUs), which are settled in stock upon vesting, and generally will vest ratably over a three-year period on the first, second, and third anniversary of the date of grant.

F3 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F6 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

F8 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Mar 9, 2026 19:50 UTC Amendment FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 1,358 $0.00 $0.00
Disclosure

SEC source: 0000352825-26-000022 · wk-form4a_1773085847.xml · nonDerivative · entry 3

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,381

F7 · shares: Represents the number of Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025 upon certification of performance results by the Compensation Committee at 11.2% for the annual period ended December 31, 2025. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

F3 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F6 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

F8 · balance_after: Includes 1,358 Performance Restricted Stock Units earned under the 2025-2027 Long Term Incentive Plan granted on 5/22/2025; those 1,358 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2027, upon certification by the Compensation Committee.

Read SEC document
February 19, 2026 Filed Mar 9, 2026 19:50 UTC Amendment FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 3,651 $0.00 $0.00
Disclosure

SEC source: 0000352825-26-000022 · wk-form4a_1773085847.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,023

F5 · shares: Represents the number of Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024 upon certification of performance results by the Compensation Committee at 39.5% for the annual period ended December 31, 2025. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

F3 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F6 · balance_after: Includes 6,036 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 6,036 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Read SEC document
February 19, 2026 Filed Mar 9, 2026 19:50 UTC Amendment FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 8,365 $0.00 $0.00
Disclosure

SEC source: 0000352825-26-000022 · wk-form4a_1773085847.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,372

F1 · shares: Represents the number of shares of common stock resulting from Performance Share Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023 upon certification of performance results by the Compensation Committee at 47.2% for the annual period ended December 31, 2025.

F2 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

F3 · balance_after: Includes 26,884 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 26,884 Performance Restricted Stock Units settled at the end of the 2023-2025 performance period upon certification by the Compensation Committee on 2/19/2026.

F4 · balance_after: This amended Form 4 was filed to correct the number of shares beneficially owned to reflect the amendment made to the Form 4 originally filed on 2/18/26. The amendment to the Form 4 was filed on 3/09/2026 to correct the number of shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2024-2026 LTIP awarded on 5/23/2024.

Read SEC document
February 14, 2026 Filed Feb 18, 2026 20:26 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,721 $31.63 $54,435.23
Disclosure

SEC source: 0001104808-26-000004 · wk-form4_1771446405.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,010

F4 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2023-2025 LTIP awarded on 2/14/23.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 14, 2026 Filed Feb 20, 2026 19:12 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,721 $31.63 $54,435.23
Disclosure

SEC source: 0001104808-26-000006 · wk-form4a_1771614728.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,022

F5 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2023-2025 LTIP awarded on 2/14/23.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 14, 2026 Filed Mar 9, 2026 19:48 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,736 $31.63 $54,909.68
Disclosure

SEC source: 0001104808-26-000010 · wk-form4a_1773085716.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,007

F5 · shares: This amendment was filed to correct the number of shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2023-2025 LTIP awarded on 2/14/23.

F3 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F4 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 13, 2026 Filed Feb 18, 2026 20:26 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,007 $31.63 $31,851.41
Disclosure

SEC source: 0001104808-26-000004 · wk-form4_1771446405.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,731

F1 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2024-2026 LTIP awarded on 5/23/24.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 13, 2026 Filed Feb 20, 2026 19:12 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,007 $31.63 $31,851.41
Disclosure

SEC source: 0001104808-26-000006 · wk-form4a_1771614728.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,743

F1 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2024-2026 LTIP awarded on 5/23/24.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

F4 · balance_after: This amended Form 4 was filed to correct the number of shares beneficially owned to reflect the amendment made to the Form 4 originally filed on 2/12/2026. The amendment to the Form 4 was on 2/23/2026 to correct the number of shares withheld to pay taxes applicable to 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

Read SEC document
February 13, 2026 Filed Mar 9, 2026 19:48 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,007 $31.63 $31,851.41
Disclosure

SEC source: 0001104808-26-000010 · wk-form4a_1773085716.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,743

F1 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2024-2026 LTIP awarded on 5/23/24.

F2 · balance_after: An amendment to the original Form 4 was filed on 2/20/2026 to correct the number of shares beneficially owned to reflect the amendment made to the Form 4 originally filed on 2/12/2026. The amendment to the Form 4 was filed on 2/20/2026 to correct the number of shares withheld to pay taxes applicable to 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

F3 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F4 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 11, 2026 Filed Feb 12, 2026 21:34 UTC FOSTER L B CO FSTR · Entity 5689 Exercise / conversionPerformance Stock Units · Derivative 1,667 $31.54 $52,577.18
Disclosure

SEC source: 0001104808-26-000002 · wk-form4_1770932078.xml · derivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,667 shares

Expires 2026-02-28

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Performance-based stock unit award of 3,333 shares was granted on 3/31/2021 and expires on 02/28/2026, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, was earned on 4/05/2024. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30-day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company.

F1 · shares: This amount represents 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

F4 · derivative.exercise_date: Performance-based stock unit award of 3,333 shares was granted on 3/31/2021 and expires on 02/28/2026, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, was earned on 4/05/2024. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30-day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company.

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February 11, 2026 Filed Feb 12, 2026 21:34 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 829 $31.54 $26,146.66
Disclosure

SEC source: 0001104808-26-000002 · wk-form4_1770932078.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,738

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 11, 2026 Filed Feb 12, 2026 21:34 UTC FOSTER L B CO FSTR · Entity 5689 Exercise / conversionCommon Stock 1,667 $0.00 $0.00
Disclosure

SEC source: 0001104808-26-000002 · wk-form4_1770932078.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,567

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: This amount represents 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

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February 11, 2026 Filed Feb 20, 2026 19:10 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Exercise / conversionPerformance Stock Units · Derivative 1,667 $31.54 $52,577.18
Disclosure

SEC source: 0000352825-26-000008 · wk-form4a_1771614604.xml · derivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,667 shares

Expires 2026-02-28

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Performance-based stock unit award of 3,333 shares was granted on 3/31/2021 and expires on 02/28/2026, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, was earned on 4/05/2024. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30-day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company.

F1 · shares: This amount represents 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

F5 · derivative.exercise_date: Performance-based stock unit award of 3,333 shares was granted on 3/31/2021 and expires on 02/28/2026, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, was earned on 4/05/2024. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30-day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company.

Read SEC document
February 11, 2026 Filed Feb 20, 2026 19:10 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 817 $31.54 $25,768.18
Disclosure

SEC source: 0000352825-26-000008 · wk-form4a_1771614604.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,750

F4 · shares: This amended Form 4 was filed to correct the number of shares withheld to pay taxes applicable to 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 11, 2026 Filed Feb 20, 2026 19:10 UTC Amendment FOSTER L B CO FSTR · Entity 5689 Exercise / conversionCommon Stock 1,667 $0.00 $0.00
Disclosure

SEC source: 0000352825-26-000008 · wk-form4a_1771614604.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,567

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: This amount represents 50 percent of the Performance-based stock unit award granted on 3/31/2021 and earned on 2/11/2026.

F2 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F3 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
May 23, 2025 Filed May 27, 2025 20:43 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 898 $18.18 $16,325.64
Disclosure

SEC source: 0000352825-25-000082 · wk-form4_1748378584.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,900

F3 · balance_after: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2024-2026 LTIP awarded on 5/23/24.

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May 22, 2025 Filed May 27, 2025 20:43 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 8,085 $0.00 $0.00
Disclosure

SEC source: 0000352825-25-000082 · wk-form4_1748378584.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,798

F1 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F2 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

Read SEC document
February 20, 2025 Filed Feb 24, 2025 22:25 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 4,884 $27.65 $135,042.60
Disclosure

SEC source: 0000352825-25-000034 · wk-form4_1740435895.xml · nonDerivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,713

F8 · shares: Shares withheld to pay taxes upon the vesting of performance shares related to the 2022-2024 LTIP awarded on 2/17/22.

F2 · balance_after: Includes 11,178 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 11,178 Performance Restricted Stock Units settled at the end of the 2022-2024 performance period upon certification by the Compensation Committee on 2/20/2025.

F5 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F7 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Read SEC document
February 20, 2025 Filed Feb 24, 2025 22:25 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 2,385 $0.00 $0.00
Disclosure

SEC source: 0000352825-25-000034 · wk-form4_1740435895.xml · nonDerivative · entry 3

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,597

F6 · shares: Represents the number of Performance Restricted Stock Units under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024 upon certification of performance results by the Compensation Committee at 25.8% for the annual period ended December 31, 2024. The earned performance restricted stock units will settle at the end of the performance period on December 31, 2026, upon certification by the Compensation Committee.

F2 · balance_after: Includes 11,178 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 11,178 Performance Restricted Stock Units settled at the end of the 2022-2024 performance period upon certification by the Compensation Committee on 2/20/2025.

F5 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F7 · balance_after: Includes 2,385 Performance Restricted Stock Units earned under the 2024-2026 Long Term Incentive Plan granted on 5/23/2024; those 2,385 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2026, upon certification of the Compensation Committee.

Read SEC document
February 20, 2025 Filed Feb 24, 2025 22:25 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 8,577 $0.00 $0.00
Disclosure

SEC source: 0000352825-25-000034 · wk-form4_1740435895.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,212

F4 · shares: Represents the number of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023 upon certification of performance results by the Compensation Committee at 48.4% for the annual period ended December 31, 2024. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

F2 · balance_after: Includes 11,178 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 11,178 Performance Restricted Stock Units settled at the end of the 2022-2024 performance period upon certification by the Compensation Committee on 2/20/2025.

F5 · balance_after: Includes 18,519 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 18,519 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 20, 2025 Filed Feb 24, 2025 22:25 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 4,786 $0.00 $0.00
Disclosure

SEC source: 0000352825-25-000034 · wk-form4_1740435895.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,635

F1 · shares: Represents the number of shares of common stock resulting from Performance Share Units earned under the 2022-2024 Long Term Incentive Plan granted on 2/17/22 upon certification of performance results by the Compensation Committee at 35.7% for the annual period ended December 31, 2024.

F2 · balance_after: Includes 11,178 shares of common stock resulting from the settlement of Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 11,178 Performance Restricted Stock Units settled at the end of the 2022-2024 performance period upon certification by the Compensation Committee on 2/20/2025.

F3 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 17, 2025 Filed Feb 19, 2025 20:45 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,027 $27.50 $28,242.50
Disclosure

SEC source: 0000352825-25-000010 · wk-form4_1739997933.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,849

F4 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2022-2024 LTIP awarded on 2/17/22.

F2 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F3 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 14, 2025 Filed Feb 19, 2025 20:45 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,930 $27.50 $53,075.00
Disclosure

SEC source: 0000352825-25-000010 · wk-form4_1739997933.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,876

F1 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2023-2025 LTIP awarded on 02/14/23.

F2 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F3 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
August 08, 2024 Filed Aug 12, 2024 16:01 UTC FOSTER L B CO FSTR · Entity 5689 PurchaseCommon Stock 2,500 $16.79 $41,975.00
Disclosure

SEC source: 0000352825-24-000182 · wk-form4_1723478471.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,806

F1 · price: This transaction was executed in multiple trades ranging from $16.16 - $17.05. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a shareholder of the issuer, full information regarding the number of shares and prices at which the transaction was effected.

F2 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F3 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
May 23, 2024 Filed May 24, 2024 17:45 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 6,163 $0.00 $0.00
Disclosure

SEC source: 0000352825-24-000126 · wk-form4_1716572694.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,306

F1 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F2 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
April 05, 2024 Filed Apr 9, 2024 18:38 UTC FOSTER L B CO FSTR · Entity 5689 Exercise / conversionPerformance Stock Units · Derivative 1,666 $27.17 $45,265.22
Disclosure

SEC source: 0000352825-24-000092 · wk-form4_1712687907.xml · derivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,667

Underlying: Common Stock · 1,666 shares

Expires 2026-02-28

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Performance-based stock unit award which expires on 02/28/26, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, may be earned when the consecutive 30 day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $25.00 per share or more and is generally subject to continued employment with the Company until the third anniversary of the grant date. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30 day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company until the third anniversary of the grant date. If either or both of these measures are achieved after the third anniversary of the grant date, the shares will be issued upon attainment of such stock price goals and if the grantee is employed by the Company on the date of attainment of such goals.

F5 · shares: This amount represents fifty percent of the Performance-based stock unit award granted on 03/31/21 and earned on 04/05/24. The remaining fifty percent of the same award may be earned until 02/28/26, the award's expiration date.

F4 · derivative.exercise_date: Performance-based stock unit award which expires on 02/28/26, 5 years after the grant date. Fifty percent of the award, or 1,666 shares, may be earned when the consecutive 30 day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $25.00 per share or more and is generally subject to continued employment with the Company until the third anniversary of the grant date. The remaining 50% of the award, or 1,667 shares, may be earned when the consecutive 30 day average closing stock price per share of the Company's common stock on the Nasdaq Stock Market is $30.00 per share or more and is generally subject to continued employment with the Company until the third anniversary of the grant date. If either or both of these measures are achieved after the third anniversary of the grant date, the shares will be issued upon attainment of such stock price goals and if the grantee is employed by the Company on the date of attainment of such goals.

Read SEC document
April 05, 2024 Filed Apr 9, 2024 18:38 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 715 $27.17 $19,426.55
Disclosure

SEC source: 0000352825-24-000092 · wk-form4_1712687907.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,143

F2 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F3 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
April 05, 2024 Filed Apr 9, 2024 18:38 UTC FOSTER L B CO FSTR · Entity 5689 Exercise / conversionCommon Stock 1,666 $0.00 $0.00
Disclosure

SEC source: 0000352825-24-000092 · wk-form4_1712687907.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,858

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: This amount represents fifty percent of the Performance-based stock unit award granted on 03/31/21 and earned on 04/05/24.

F2 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F3 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
March 01, 2024 Filed Mar 5, 2024 20:06 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 2,164 $23.78 $51,459.92
Disclosure

SEC source: 0000352825-24-000073 · wk-form4_1709669162.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,192

F1 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F2 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 26, 2024 Filed Feb 27, 2024 22:11 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 842 $23.40 $19,702.80
Disclosure

SEC source: 0000352825-24-000064 · wk-form4_1709071912.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,356

F1 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F2 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 17, 2024 Filed Feb 21, 2024 20:22 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 985 $24.00 $23,640.00
Disclosure

SEC source: 0000352825-24-000034 · wk-form4_1708546931.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,198

F1 · balance_after: Includes 6,392 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 6,392 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

F2 · balance_after: Includes 9,942 Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 2/14/2023; those 9,942 Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 14, 2024 Filed Feb 15, 2024 22:30 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,847 $24.00 $44,328.00
Disclosure

SEC source: 0000352825-24-000014 · wk-form4_1708036244.xml · nonDerivative · entry 5

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,183

F5 · shares: Shares withheld to pay taxes applicable to the vesting of restricted stock related to the 2023-2025 LTIP awarded on 02/14/23.

Read SEC document
February 13, 2024 Filed Feb 15, 2024 22:30 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 9,942 $0.00 $0.00
Disclosure

SEC source: 0000352825-24-000014 · wk-form4_1708036244.xml · nonDerivative · entry 4

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,030

F4 · shares: Represents the number of Performance Restricted Stock Units earned under the 2023-2025 Long Term Incentive Plan granted on 02/14/2023 upon certification of performance results by the Compensation Committee at 187.0% for the annual period ended December 31, 2023. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2025, upon certification by the Compensation Committee.

Read SEC document
February 13, 2024 Filed Feb 15, 2024 22:30 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 3,874 $0.00 $0.00
Disclosure

SEC source: 0000352825-24-000014 · wk-form4_1708036244.xml · nonDerivative · entry 3

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,088

F3 · shares: Represents the number of Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022 upon certification of performance results by the Compensation Committee at 96.3% for the annual period ended December 31, 2023. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2024, upon certification by the Compensation Committee.

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February 13, 2024 Filed Feb 15, 2024 22:30 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,144 $23.76 $27,181.44
Disclosure

SEC source: 0000352825-24-000014 · wk-form4_1708036244.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,214

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February 13, 2024 Filed Feb 15, 2024 22:30 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 2,377 $0.00 $0.00
Disclosure

SEC source: 0000352825-24-000014 · wk-form4_1708036244.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,358

F1 · shares: Represents shares of common stock resulting from performance share units which were contingent rights to receive shares of common stock based on the Issuer's performance against certain pre-established financial metrics for the 2021-2023 performance period.

F2 · balance_after: Includes 2,518 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022; those 2,518 Performance Restricted Stock Units will settle at the end of the 2022-2024 performance period on December 31, 2024, upon certification by the Compensation Committee.

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March 01, 2023 Filed Mar 2, 2023 20:16 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 2,144 $12.46 $26,714.24
Disclosure

SEC source: 0000352825-23-000026 · wf-form4_167778815856407.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · Senior VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,981

F1 · balance_after: Includes 2,518 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022.

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February 26, 2023 Filed Feb 28, 2023 20:31 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 842 $12.80 $10,777.60
Disclosure

SEC source: 0000352825-23-000011 · wf-form4_167761629166849.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · Senior VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,125

F1 · balance_after: Includes 2,518 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022.

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February 17, 2023 Filed Feb 22, 2023 20:22 UTC FOSTER L B CO FSTR · Entity 5689 Tax withholdingCommon Stock 1,088 $12.81 $13,937.28
Disclosure

SEC source: 0001567619-23-003468 · doc1.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · Senior VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,967

F1 · balance_after: Includes 2,518 Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022.

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February 14, 2023 Filed Feb 16, 2023 20:22 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 2,518 $0.00 $0.00
Disclosure

SEC source: 0001567619-23-003151 · doc1.xml · nonDerivative · entry 2

THALMAN WILLIAM M · CIK 0001104808 · Senior VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,055

F2 · shares: Represents the number of Performance Restricted Stock Units earned under the 2022-2024 Long Term Incentive Plan granted on 02/17/2022, upon certification of performance results by the Compensation Committee at 93.9% for the annual period ended December 31, 2022. The earned Performance Restricted Stock Units will settle at the end of the performance period on December 31, 2024, upon certification by the Compensation Committee.

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February 14, 2023 Filed Feb 16, 2023 20:22 UTC FOSTER L B CO FSTR · Entity 5689 GrantCommon Stock 11,814 $0.00 $0.00
Disclosure

SEC source: 0001567619-23-003151 · doc1.xml · nonDerivative · entry 1

THALMAN WILLIAM M · CIK 0001104808 · Senior VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,537

F1 · shares: Award of time vested restricted stock, which will vest in 33 1/3 increments on each of the first, second, and third anniversaries of the date of the grant.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.