144 0001445525 XXXXXXXX LIVE 0001001385 NORTHWEST PIPE CO 000-27140 201 NE PARK PLAZA DRIVE SUITE 100 VANCOUVER WA 98684 3603976250 Kendrick Megan A. Officer Common Ameriprise Financial Services Inc.

2865 Ameriprise Financial Center Minneapolis MN 55474

1000 44220.00 9918711 10/15/2024 NASDAQ Common 03/31/2020 LTIP Issuer N 1000 03/31/2020 N/A N Megan Kendrick

201 NE Park Plaza Drive Suite 100 Vancouver WA 98684

Common 09/16/2024 1000 42370.00 Shares that were sold were sold pursuant to a Rule 10B5-1 trading plan 10/15/2024 06/10/2024 /s/ Alexander Meginnes as a duly authorized representative of Ameriprise Financial Services Inc, as attorney-in-fact for Megan Kendrick