| SC 13G/A | 2009-02-09 | DIMENSIONAL FUND ADVISORS INC | QUAKER CHEMICAL CORP | 374,519 | 3.5% | EDGAR |
| SC 13G | 2009-02-05 | BARCLAYS GLOBAL INVESTORS NA /CA/ | QUAKER CHEMICAL CORP | 362,028 | 3.3% | EDGAR |
| SC 13G/A | 2009-01-30 | ROYCE & ASSOCIATES LLC | QUAKER CHEMICAL CORP | 704,577 | 6.5% | EDGAR |
| SC 13G | 2009-01-26 | EAGLE ASSET MANAGEMENT INC | QUAKER CHEMICAL CORP | 635,018 | 5.9% | EDGAR |
| SC 13G/A | 2008-02-11 | NAPLES RONALD J | QUAKER CHEMICAL CORP | 825,188 | 7.8% | EDGAR |
| SC 13G/A | 2008-02-06 | DIMENSIONAL FUND ADVISORS INC | QUAKER CHEMICAL CORP | 636,348 | 6.3% | EDGAR |
| SC 13G/A | 2008-01-31 | ROYCE & ASSOCIATES LLC | QUAKER CHEMICAL CORP | 832,400 | 8.2% | EDGAR |
| SC 13G/A | 2007-02-09 | DIMENSIONAL FUND ADVISORS INC | QUAKER CHEMICAL CORP | 781,868 | 7.9% | EDGAR |
| SC 13G/A | 2007-02-07 | NAPLES RONALD J | QUAKER CHEMICAL CORP | 775,808 | 7.5% | EDGAR |
| SC 13G/A | 2007-02-02 | DIMENSIONAL FUND ADVISORS INC | QUAKER CHEMICAL CORP | 781,868 | 7.9% | EDGAR |
| SC 13G/A | 2007-01-24 | ROYCE & ASSOCIATES LLC | QUAKER CHEMICAL CORP | 878,200 | 8.9% | EDGAR |
| SC 13G | 2006-02-06 | DIMENSIONAL FUND ADVISORS INC | QUAKER CHEMICAL CORP | 690,692 | 7.1% | EDGAR |
| SC 13G/A | 2006-02-03 | NAPLES RONALD J | QUAKER CHEMICAL CORP | 796,384 | 7.7% | EDGAR |
| SC 13G/A | 2006-01-31 | ROYCE & ASSOCIATES LLC | QUAKER CHEMICAL CORP | 855,100 | 8.8% | EDGAR |
| SC 13G | 2006-01-19 | INVESTMENT COUNSELORS OF MARYLAND LLC | QUAKER CHEMICAL CORP | 371,875 | 3.8% | EDGAR |
| SC 13G | 2005-11-14 | BERNZOTT CAPITAL ADVISORS | QUAKER CHEMICAL CORP | 2,400 | 0.0% | EDGAR |
| SC 13G | 2005-02-09 | BERNZOTT CAPITAL ADVISORS | QUAKER CHEMICAL CORP | 490,740 | 5.1% | EDGAR |
| SC 13G/A | 2005-02-04 | NAPLES RONALD J | QUAKER CHEMICAL CORP | 827,707 | 8.0% | EDGAR |
| SC 13G | 2005-02-03 | INVESTMENT COUNSELORS OF MARYLAND LLC | QUAKER CHEMICAL CORP | 507,400 | 5.2% | EDGAR |
| SC 13G/A | 2005-02-02 | ROYCE & ASSOCIATES LLC | QUAKER CHEMICAL CORP | 1,200,700 | 12.4% | EDGAR |