| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2007-01-26 | BECKER CAPITAL MANAGEMENT INC | NORTHWEST PIPE CO | 4 | 4.0% | EDGAR |
| SC 13G/A | 2006-02-14 | FRANKLIN RESOURCES INC | NORTHWEST PIPE CO | 333,000 | 4.9% | EDGAR |
| SC 13G/A | 2006-02-14 | FMR CORP | NORTHWEST PIPE CO | 670,375 | 9.8% | EDGAR |
| SC 13G | 2006-02-10 | BECKER CAPITAL MANAGEMENT INC | NORTHWEST PIPE CO | 342,000 | 5.0% | EDGAR |
| SC 13G | 2006-02-10 | DREMAN VALUE MANAGEMENT L L C | NORTHWEST PIPE CO | 399,100 | 5.0% | EDGAR |
| SC 13G/A | 2006-02-08 | BANK OF AMERICA CORP /DE/ | NORTHWEST PIPE CO | 653,332 | 9.6% | EDGAR |
| SC 13G/A | 2006-02-06 | DIMENSIONAL FUND ADVISORS INC | NORTHWEST PIPE CO | 377,449 | 5.5% | EDGAR |
| SC 13G/A | 2006-02-03 | WELLS FARGO & CO/MN | NORTHWEST PIPE CO | 954,065 | 14.0% | EDGAR |
| SC 13G/A | 2005-03-08 | HEARTLAND ADVISORS INC | NORTHWEST PIPE CO | 222,637 | 3.4% | EDGAR |
| SC 13G/A | 2005-02-14 | WELLINGTON MANAGEMENT CO LLP | NORTHWEST PIPE CO | 0 | 0.0% | EDGAR |
| SC 13G | 2005-02-14 | FRANKLIN RESOURCES INC | NORTHWEST PIPE CO | 333,000 | 5.0% | EDGAR |
| SC 13G/A | 2005-02-11 | BANK OF AMERICA CORP /DE/ | NORTHWEST PIPE CO | 663,082 | 10.0% | EDGAR |
| SC 13G/A | 2005-02-09 | DIMENSIONAL FUND ADVISORS INC | NORTHWEST PIPE CO | 371,049 | 5.6% | EDGAR |
| SC 13G | 2005-02-04 | BECKER CAPITAL MANAGEMENT INC | NORTHWEST PIPE CO | 397,785 | 6.0% | EDGAR |
| SC 13G/A | 2005-01-21 | WELLS FARGO & CO/MN | NORTHWEST PIPE CO | 961,165 | 14.5% | EDGAR |
| SC 13G | 2005-01-19 | HEARTLAND ADVISORS INC | NORTHWEST PIPE CO | 375,401 | 5.6% | EDGAR |
| SC 13G/A | 2005-01-10 | FMR CORP | NORTHWEST PIPE CO | 666,540 | 10.0% | EDGAR |
| SC 13G/A | 2004-11-17 | BANK OF AMERICA CORP /DE/ | NORTHWEST PIPE CO | 664,582 | 10.0% | EDGAR |
| SC 13G/A | 2004-06-25 | BANK OF AMERICA CORP /DE/ | NORTHWEST PIPE CO | 652,382 | 9.9% | EDGAR |
| SC 13G/A | 2004-06-04 | BANK OF AMERICA CORP /DE/ | NORTHWEST PIPE CO | 652,382 | 9.9% | EDGAR |