As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

  4/3/24  Montross Scott J                  4          Officer²    1:14K  Northwest Pipe Co.                RDG Filings/FA           
  4/1/24  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
 1/17/24  Montross Scott J                  4          Officer²    1:14K  Northwest Pipe Co.                RDG Filings/FA           
 4/11/23  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
  4/4/23  Montross Scott J                  4          Officer²    1:14K  Northwest Pipe Co.                RDG Filings/FA           
 1/18/23  Montross Scott J                  4          Officer²    1:14K  Northwest Pipe Co.                RDG Filings/FA           
 6/21/22  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
  6/6/22  Montross Scott J                  4          Officer²    1:8K   Northwest Pipe Co.                RDG Filings/FA           
  6/1/22  Montross Scott J                  4          Officer²    1:8K   Northwest Pipe Co.                RDG Filings/FA           
 5/24/22  Montross Scott J                  4          Officer²    1:8K   Northwest Pipe Co.                RDG Filings/FA           
 5/19/22  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
 5/17/22  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
 5/12/22  Montross Scott J                  4          Officer²    1:7K   Northwest Pipe Co.                RDG Filings/FA           
  4/4/22  Montross Scott J                  4          Officer²    1:11K  Northwest Pipe Co.                RDG Filings/FA           
 2/10/22  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
 1/20/22  Montross Scott J                  4          Officer²    1:6K   Northwest Pipe Co.                RDG Filings/FA           
 1/19/22  Montross Scott J                  4          Officer²    1:14K  Northwest Pipe Co.                RDG Filings/FA           
 1/18/22  Montross Scott J                  4          Officer²    1:8K   Northwest Pipe Co.                RDG Filings/FA           
 1/12/22  Montross Scott J                  4          Officer²    1:9K   Northwest Pipe Co.                RDG Filings/FA           
 1/10/22  Montross Scott J                  4          Officer²    1:8K   Northwest Pipe Co.                RDG Filings/FA           

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¹	Filing/Form Type:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.