SC 13G/A | 2007-06-11 | GOLDMAN SACHS ASSET MANAGEMENT LP | OM GROUP INC | 1,153,503 | 3.9% | EDGAR |
SC 13G | 2007-05-07 | SAC CAPITAL ADVISORS LLC | OM GROUP INC | 1,011,200 | 3.4% | EDGAR |
SC 13G/A | 2007-02-09 | DIMENSIONAL FUND ADVISORS INC | OM GROUP INC | 1,128,418 | 3.8% | EDGAR |
SC 13G/A | 2007-02-02 | DIMENSIONAL FUND ADVISORS INC | OM GROUP INC | 1,128,418 | 3.8% | EDGAR |
SC 13G | 2007-01-23 | BARCLAYS GLOBAL INVESTORS NA /CA/ | OM GROUP INC | 643,853 | 2.2% | EDGAR |
SC 13G/A | 2007-01-10 | FMR CORP | OM GROUP INC | 2,684,950 | 9.1% | EDGAR |
SC 13G | 2007-01-10 | GOLDMAN SACHS ASSET MANAGEMENT LP | OM GROUP INC | 3,040,346 | 10.4% | EDGAR |
SC 13G | 2006-02-13 | LSV ASSET MANAGEMENT | OM GROUP INC | 1,686,680 | 5.8% | EDGAR |
SC 13G | 2006-02-10 | BARCLAYS PLC | OM GROUP INC | - | 0.0% | EDGAR |
SC 13G | 2006-02-06 | DIMENSIONAL FUND ADVISORS INC | OM GROUP INC | 1,865,200 | 6.4% | EDGAR |
SC 13G/A | 2005-12-12 | FMR CORP | OM GROUP INC | 4,335,838 | 15.0% | EDGAR |
SC 13G/A | 2005-02-14 | FMR CORP | OM GROUP INC | 2,750,000 | 9.7% | EDGAR |
SC 13G/A | 2005-02-14 | LORD ABBETT & CO | OM GROUP INC | 736,391 | 2.6% | EDGAR |
SC 13G | 2005-02-14 | BARCLAYS GLOBAL INVESTORS NA /CA/ | OM GROUP INC | 933,169 | 3.3% | EDGAR |
SC 13G | 2005-02-11 | LSV ASSET MANAGEMENT | OM GROUP INC | 1,744,822 | 6.2% | EDGAR |
SC 13G/A | 2004-08-10 | STRONG CAPITAL MANAGEMENT INC ET AL | OM GROUP INC | 1,089,685 | 3.8% | EDGAR |
SC 13G/A | 2004-02-17 | ARDSLEY ADVISORY PARTNERS | OM GROUP INC | 650,000 | 2.3% | EDGAR |
SC 13G | 2004-02-17 | FMR CORP | OM GROUP INC | 2,835,000 | 10.0% | EDGAR |
SC 13G | 2004-02-17 | STRONG CAPITAL MANAGEMENT INC ET AL | OM GROUP INC | 1,702,700 | 6.0% | EDGAR |
SC 13G | 2004-02-13 | FLEETBOSTON FINANCIAL CORP | OM GROUP INC | 1,779,300 | 6.3% | EDGAR |