| SC 13G/A | 2005-02-14 | WELLINGTON MANAGEMENT CO LLP | POWELL INDUSTRIES INC | 656,000 | 6.1% | EDGAR |
| SC 13G/A | 2005-02-02 | ROYCE & ASSOCIATES LLC | POWELL INDUSTRIES INC | 1,315,800 | 12.3% | EDGAR |
| SC 13G | 2005-01-12 | NATIONWIDE TRUST CO FSB | POWELL INDUSTRIES INC | 605,059 | 5.6% | EDGAR |
| SC 13G/A | 2004-02-13 | FLEETBOSTON FINANCIAL CORP | POWELL INDUSTRIES INC | 338,500 | 3.2% | EDGAR |
| SC 13G/A | 2004-02-12 | WELLINGTON MANAGEMENT CO LLP | POWELL INDUSTRIES INC | 681,400 | 6.4% | EDGAR |
| SC 13G/A | 2004-02-12 | POWELL BONNIE L | POWELL INDUSTRIES INC | 828,469 | 7.8% | EDGAR |
| SC 13G | 2004-02-12 | POWELL BONNIE L | POWELL INDUSTRIES INC | 869,419 | 8.2% | EDGAR |
| SC 13G/A | 2004-02-05 | ROYCE & ASSOCIATES LLC | POWELL INDUSTRIES INC | 1,312,800 | 12.3% | EDGAR |
| SC 13G | 2004-01-20 | NATIONWIDE TRUST CO FSB | POWELL INDUSTRIES INC | 632,600 | 5.9% | EDGAR |
| SC 13D | 2003-07-02 | POWELL THOMAS W | POWELL INDUSTRIES INC | 3,058,639 | 28.9% | EDGAR |
| SC 13G | 2003-02-14 | FLEETBOSTON FINANCIAL CORP | POWELL INDUSTRIES INC | 553,000 | 5.0% | EDGAR |
| SC 13G/A | 2003-02-12 | WELLINGTON MANAGEMENT CO LLP | POWELL INDUSTRIES INC | 674,600 | 6.1% | EDGAR |
| SC 13G | 2003-02-06 | NATIONWIDE TRUST CO FSB | POWELL INDUSTRIES INC | 644,915 | 6.1% | EDGAR |
| SC 13G/A | 2003-02-05 | ROYCE & ASSOCIATES LLC | POWELL INDUSTRIES INC | 1,277,900 | 12.1% | EDGAR |
| SC 13G/A | 2002-10-10 | FMR CORP | POWELL INDUSTRIES INC | 131,000 | 1.2% | EDGAR |
| SC 13G | 2002-08-08 | ROYCE & ASSOCIATES LLC | POWELL INDUSTRIES INC | 1,198,000 | 11.4% | EDGAR |
| SC 13G/A | 2002-03-08 | KERN CAPITAL MANAGEMENT LLC /ADV | POWELL INDUSTRIES INC | 381,400 | 3.6% | EDGAR |
| SC 13G/A | 2002-02-14 | FMR CORP | POWELL INDUSTRIES INC | 670,300 | 6.4% | EDGAR |
| SC 13G/A | 2002-02-14 | KERN CAPITAL MANAGEMENT LLC /ADV | POWELL INDUSTRIES INC | 1,158,900 | 11.1% | EDGAR |
| SC 13G | 2002-02-13 | KLEIN BANK | POWELL INDUSTRIES INC | 686,084 | 6.6% | EDGAR |