NWPX

SEC source: 0001437749-23-001228 · rdgdoc.xml · derivative · entry 8

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,170

Underlying: Common Stock · 649 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F5 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 17, 2022, 1/3 on January 16, 2023 and 1/3 on January 15, 2024.

F5 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 17, 2022, 1/3 on January 16, 2023 and 1/3 on January 15, 2024.

SEC source: 0001437749-23-001228 · rdgdoc.xml · derivative · entry 7

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,819

Underlying: Common Stock · 810 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F4 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 15, 2021, 1/3 on January 17, 2022 and 1/3 on January 16, 2023.

F4 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 15, 2021, 1/3 on January 17, 2022 and 1/3 on January 16, 2023.

SEC source: 0001437749-23-001228 · rdgdoc.xml · nonDerivative · entry 6

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,077

F2 · price: Represents shares withheld by the issuer for payment of taxes incurred upon vesting event consistent with company policy.

SEC source: 0001437749-23-001228 · rdgdoc.xml · nonDerivative · entry 5

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,520

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-23-001228 · rdgdoc.xml · nonDerivative · entry 4

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,679

F2 · price: Represents shares withheld by the issuer for payment of taxes incurred upon vesting event consistent with company policy.

SEC source: 0001437749-23-001228 · rdgdoc.xml · nonDerivative · entry 3

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,021

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-23-001228 · rdgdoc.xml · nonDerivative · entry 2

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,372

F2 · price: Represents shares withheld by the issuer for payment of taxes incurred upon vesting event consistent with company policy.

SEC source: 0001437749-23-001228 · rdgdoc.xml · nonDerivative · entry 1

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,799

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-23-001224 · rdgdoc.xml · derivative · entry 9

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,494

Underlying: Common Stock · 2,650 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F6 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F6 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-23-001224 · rdgdoc.xml · derivative · entry 8

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,144

Underlying: Common Stock · 2,913 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F5 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 17, 2022, 1/3 on January 16, 2023 and 1/3 on January 15, 2024.

F5 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 17, 2022, 1/3 on January 16, 2023 and 1/3 on January 15, 2024.

SEC source: 0001437749-23-001224 · rdgdoc.xml · derivative · entry 7

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,337

Underlying: Common Stock · 2,740 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F4 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 15, 2021, 1/3 on January 17, 2022 and 1/3 on January 16, 2023.

F4 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 15, 2021, 1/3 on January 17, 2022 and 1/3 on January 16, 2023.

SEC source: 0001437749-23-001224 · rdgdoc.xml · nonDerivative · entry 6

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,083

F2 · price: Represents shares withheld by the issuer for payment of taxes incurred upon vesting event consistent with company policy.

SEC source: 0001437749-23-001224 · rdgdoc.xml · nonDerivative · entry 5

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 94,101

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-23-001224 · rdgdoc.xml · nonDerivative · entry 4

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,451

F2 · price: Represents shares withheld by the issuer for payment of taxes incurred upon vesting event consistent with company policy.

SEC source: 0001437749-23-001224 · rdgdoc.xml · nonDerivative · entry 3

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 92,416

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-23-001224 · rdgdoc.xml · nonDerivative · entry 2

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,223

F2 · price: Represents shares withheld by the issuer for payment of taxes incurred upon vesting event consistent with company policy.

SEC source: 0001437749-23-001224 · rdgdoc.xml · nonDerivative · entry 1

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,479

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-24-001538 · rdgdoc.xml · nonDerivative · entry 3

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,165

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 · price: Represents shares acquired pursuant to vesting of Restricted Stock Units.

SEC source: 0001437749-24-001547 · rdgdoc.xml · derivative · entry 9

Wray Michael · CIK 0001922394 · SVP/GM, Precast Infrastructure

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,556

Underlying: Common Stock · 917 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F6 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 15, 2024, 1/3 on January 15, 2025 and 1/3 on January 15, 2026.

F6 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 15, 2024, 1/3 on January 15, 2025 and 1/3 on January 15, 2026.

SEC source: 0001437749-24-001547 · rdgdoc.xml · derivative · entry 8

Wray Michael · CIK 0001922394 · SVP/GM, Precast Infrastructure

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,473

Underlying: Common Stock · 720 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F5 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F5 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-24-001547 · rdgdoc.xml · derivative · entry 7

Wray Michael · CIK 0001922394 · SVP/GM, Precast Infrastructure

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,193

Underlying: Common Stock · 313 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F3 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F4 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 17, 2022, 1/3 on January 16, 2023 and 1/3 on January 15, 2024.

F4 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 17, 2022, 1/3 on January 16, 2023 and 1/3 on January 15, 2024.

SEC source: 0001437749-22-025130 · rdgdoc.xml · nonDerivative · entry 2

FRANSON MICHAEL C · CIK 0001233202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,924

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $34.00 to $34.13 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-025130 · rdgdoc.xml · nonDerivative · entry 1

FRANSON MICHAEL C · CIK 0001233202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,636

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $34.00 to $34.01 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-024584 · rdgdoc.xml · nonDerivative · entry 2

ROMAN RICHARD A · CIK 0001234059 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,334

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.20 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-024584 · rdgdoc.xml · nonDerivative · entry 1

ROMAN RICHARD A · CIK 0001234059 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,745

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.085 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-024425 · rdgdoc.xml · nonDerivative · entry 2

FRANSON MICHAEL C · CIK 0001233202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,487

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.035 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-024423 · rdgdoc.xml · nonDerivative · entry 2

ROMAN RICHARD A · CIK 0001234059 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,878

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.0925 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-024425 · rdgdoc.xml · nonDerivative · entry 1

FRANSON MICHAEL C · CIK 0001233202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,954

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.07 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-024423 · rdgdoc.xml · nonDerivative · entry 1

ROMAN RICHARD A · CIK 0001234059 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,342

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.07 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-015331 · rdgdoc.xml · nonDerivative · entry 1

FRANSON MICHAEL C · CIK 0001233202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,588

SEC source: 0001437749-22-015328 · rdgdoc.xml · nonDerivative · entry 1

Kulesa Amanda · CIK 0001817893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,783

SEC source: 0001437749-22-015326 · rdgdoc.xml · nonDerivative · entry 1

Paschal John · CIK 0001786227 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,092

SEC source: 0001437749-22-015320 · rdgdoc.xml · nonDerivative · entry 1

LARSON KEITH R · CIK 0001401658 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,377

SEC source: 0001437749-22-015317 · rdgdoc.xml · nonDerivative · entry 2

ROMAN RICHARD A · CIK 0001234059 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,334

SEC source: 0001437749-22-015433 · rdgdoc.xml · derivative · entry 3

Wray Michael · CIK 0001922394 · SVP/GM, Precast Infrastructure

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,298

Underlying: Common Stock · 6,483 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F3 · price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F4 · derivative.exercise_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F4 · derivative.expiration_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F3 · derivative.underlying_shares: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

SEC source: 0001437749-22-015433 · rdgdoc.xml · derivative · entry 2

Wray Michael · CIK 0001922394 · SVP/GM, Precast Infrastructure

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,099

Underlying: Common Stock · 2,161 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F1 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F2 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-22-015436 · rdgdoc.xml · derivative · entry 3

Kendrick Megan A. · CIK 0001445525 · VP of Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,637

Underlying: Common Stock · 3,103 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F3 · price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F4 · derivative.exercise_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F4 · derivative.expiration_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F3 · derivative.underlying_shares: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

SEC source: 0001437749-22-015436 · rdgdoc.xml · derivative · entry 2

Kendrick Megan A. · CIK 0001445525 · VP of Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,879

Underlying: Common Stock · 1,034 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F1 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F2 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-22-015431 · rdgdoc.xml · derivative · entry 3

Stokes Eric · CIK 0001808046 · SVP/GM of Engineered SPP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,440

Underlying: Common Stock · 6,790 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F3 · price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F4 · derivative.exercise_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F4 · derivative.expiration_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F3 · derivative.underlying_shares: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

SEC source: 0001437749-22-015431 · rdgdoc.xml · derivative · entry 2

Stokes Eric · CIK 0001808046 · SVP/GM of Engineered SPP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,148

Underlying: Common Stock · 2,264 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F1 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F2 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-22-015428 · rdgdoc.xml · derivative · entry 3

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,892

Underlying: Common Stock · 7,567 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F3 · price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F4 · derivative.exercise_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F4 · derivative.expiration_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F3 · derivative.underlying_shares: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

SEC source: 0001437749-22-015428 · rdgdoc.xml · derivative · entry 2

Wilkins Aaron · CIK 0001685213 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,629

Underlying: Common Stock · 2,522 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F1 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F2 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-22-015424 · rdgdoc.xml · derivative · entry 3

Brittain Miles · CIK 0001766072 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,788

Underlying: Common Stock · 7,567 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F3 · price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F4 · derivative.exercise_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F4 · derivative.expiration_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F3 · derivative.underlying_shares: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

SEC source: 0001437749-22-015424 · rdgdoc.xml · derivative · entry 2

Brittain Miles · CIK 0001766072 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,597

Underlying: Common Stock · 2,522 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F1 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F2 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-22-015422 · rdgdoc.xml · derivative · entry 3

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,236

Underlying: Common Stock · 23,850 shares

Expires not disclosed

F3 · derivative.exercise_price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F3 · price: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

F4 · derivative.exercise_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F4 · derivative.expiration_date: Performance Shares vest in installments as follows: 1/3 on March 31, 2023, 1/3 on April 1, 2024 and 1/3 on March 31, 2025.

F3 · derivative.underlying_shares: Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on Northwest Pipe Company's total EBITDA margin over the measurement period.

SEC source: 0001437749-22-015422 · rdgdoc.xml · derivative · entry 2

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,077

Underlying: Common Stock · 7,950 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F1 · price: Each Restricted Stock Unit represents a contingent right to receive one share of Northwest Pipe Company common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

F2 · derivative.expiration_date: The Restricted Stock Units vest in installments as follows: 1/3 on January 16, 2023, 1/3 on January 15, 2024 and 1/3 on January 15, 2025.

SEC source: 0001437749-22-015317 · rdgdoc.xml · nonDerivative · entry 1

ROMAN RICHARD A · CIK 0001234059 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,058

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $32.00 to $32.42 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-014445 · rdgdoc.xml · nonDerivative · entry 2

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,739

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $33.96 to $34.295 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-014445 · rdgdoc.xml · nonDerivative · entry 1

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,291

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $33.96 to $34.37 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001437749-22-013994 · rdgdoc.xml · nonDerivative · entry 2

MONTROSS SCOTT J · CIK 0001228503 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,291

F1 · shares: Sale of stock pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $32.94 to $33.41 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.