The current institutional shareholding score of Northwest Pipe Co is 10.00, ranking 1 out of 126 in the Metals & Mining industry. The latest institutional shareholding proportion is 90.57%, representing a quarter-over-quarter increase of 5.47%. The largest institutional shareholder is Bill Nygren | OAKMX, holding a total of 258.73K shares, representing 4.20% of shares outstanding, with 22.22% decrease in holdings.