| SC 13G/A | 2006-02-14 | ELM RIDGE CAPITAL MANAGEMENT LLC | QUANTUM CORP /DE/ | 10,126,775 | 5.4% | EDGAR |
| SC 13G/A | 2006-02-13 | NWQ INVESTMENT MANAGEMENT CO LLC | QUANTUM CORP /DE/ | 48,920,094 | 23.8% | EDGAR |
| SC 13G/A | 2006-01-05 | CITIGROUP INC | QUANTUM CORP /DE/ | 1,929,194 | 1.0% | EDGAR |
| SC 13G | 2005-10-06 | ELM RIDGE CAPITAL MANAGEMENT LLC | QUANTUM CORP /DE/ | 9,679,600 | 5.3% | EDGAR |
| SC 13G/A | 2005-02-14 | PRIVATE CAPITAL MANAGEMENT | QUANTUM CORP /DE/ | 42,697,248 | 1.0% | EDGAR |
| SC 13G/A | 2005-02-14 | NWQ INVESTMENT MANAGEMENT CO LLC | QUANTUM CORP /DE/ | 28,514,606 | 15.7% | EDGAR |
| SC 13G/A | 2005-02-10 | CITIGROUP INC | QUANTUM CORP /DE/ | 11,731,667 | 6.4% | EDGAR |
| SC 13G/A | 2004-11-29 | NWQ INVESTMENT MANAGEMENT CO LLC | QUANTUM CORP /DE/ | 28,230,067 | 15.5% | EDGAR |
| SC 13G/A | 2004-02-17 | CITIGROUP INC | QUANTUM CORP /DE/ | 14,375,622 | 8.1% | EDGAR |
| SC 13G/A | 2004-02-13 | PRIVATE CAPITAL MANAGEMENT | QUANTUM CORP /DE/ | 42,147,124 | 1.0% | EDGAR |
| SC 13G | 2004-02-10 | AXA FINANCIAL INC | QUANTUM CORP /DE/ | 7,362,630 | 4.1% | EDGAR |
| SC 13G | 2003-12-09 | NWQ INVESTMENT MANAGEMENT CO LLC | QUANTUM CORP /DE/ | 18,181,567 | 10.2% | EDGAR |
| SC 13G/A | 2003-02-12 | AXA FINANCIAL INC | QUANTUM CORP /DE/ | 16,882,069 | 9.9% | EDGAR |
| SC 13G/A | 2003-02-11 | CITIGROUP INC | QUANTUM CORP /DE/ | 16,686,224 | 9.8% | EDGAR |
| SC 13G/A | 2003-02-10 | PRIVATE CAPITAL MANAGEMENT | QUANTUM CORP /DE/ | 34,778,507 | 1.0% | EDGAR |
| SC 13G/A | 2002-02-15 | PRIVATE CAPITAL MANAGEMENT | QUANTUM CORP /DE/ | 25,343,172 | 1.0% | EDGAR |
| SC 13G/A | 2002-02-12 | AXA FINANCIAL INC | QUANTUM CORP /DE/ | 18,242,504 | 11.7% | EDGAR |
| SC 13G/A | 2002-02-11 | J P MORGAN CHASE & CO | QUANTUM CORP /DE/ | 133,400 | 0.1% | EDGAR |
| SC 13G/A | 2002-02-06 | CITIGROUP INC | QUANTUM CORP /DE/ | 21,740,892 | 14.0% | EDGAR |
| SC 13G/A | 2002-01-31 | MELLON FINANCIAL CORP | QUANTUM CORP /DE/ | 0 | 0.0% | EDGAR |