| SC 13G | 2008-06-30 | PACIFIC COAST INVESTORS LTD | HESKA CORP | 7,790,466 | 15.1% | EDGAR |
| SC 13G/A | 2008-02-14 | Charter Ventures II, L.P. | HESKA CORP | 987,510 | 1.9% | EDGAR |
| SC 13G | 2008-02-14 | ASHFORD CAPITAL MANAGEMENT INC | HESKA CORP | 3,197,500 | 6.2% | EDGAR |
| SC 13G/A | 2008-02-11 | ZESIGER CAPITAL GROUP LLC | HESKA CORP | 8,308,200 | 16.2% | EDGAR |
| SC 13G/A | 2008-02-08 | STATE OF WISCONSIN INVESTMENT BOARD | HESKA CORP | - | 18.2% | EDGAR |
| SC 13G/A | 2007-02-13 | Charter Ventures II, L.P. | HESKA CORP | 987,510 | 2.0% | EDGAR |
| SC 13G/A | 2007-02-13 | ZESIGER CAPITAL GROUP LLC | HESKA CORP | 7,188,900 | 14.2% | EDGAR |
| SC 13G/A | 2007-02-13 | STATE OF WISCONSIN INVESTMENT BOARD | HESKA CORP | - | 18.5% | EDGAR |
| SC 13G | 2006-07-26 | Charter Ventures II, L.P. | HESKA CORP | 987,510 | 2.0% | EDGAR |
| SC 13G/A | 2006-07-13 | CHARTER LIFE SCIENCES I-IV LLC | HESKA CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2006-02-16 | ZESIGER CAPITAL GROUP LLC | HESKA CORP | 6,648,200 | 13.3% | EDGAR |
| SC 13G/A | 2006-02-15 | STATE OF WISCONSIN INVESTMENT BOARD | HESKA CORP | - | 18.8% | EDGAR |
| SC 13G/A | 2005-02-14 | ZESIGER CAPITAL GROUP LLC | HESKA CORP | 6,287,800 | 12.8% | EDGAR |
| SC 13G/A | 2005-02-08 | STATE OF WISCONSIN INVESTMENT BOARD | HESKA CORP | - | 19.0% | EDGAR |
| SC 13G/A | 2004-08-10 | ZESIGER CAPITAL GROUP LLC | HESKA CORP | 5,936,760 | 12.1% | EDGAR |
| SC 13G/A | 2004-02-13 | ZESIGER CAPITAL GROUP LLC | HESKA CORP | 4,507,810 | 9.3% | EDGAR |
| SC 13G/A | 2004-02-13 | LOMBARD ODIER & CIE | HESKA CORP | 1,178,215 | 2.4% | EDGAR |
| SC 13G/A | 2004-02-11 | STATE OF WISCONSIN INVESTMENT BOARD | HESKA CORP | - | 19.4% | EDGAR |
| SC 13G | 2003-11-17 | CHARTER VENTURES II LP | HESKA CORP | 151,116 | 0.3% | EDGAR |
| SC 13G | 2003-11-17 | CHARTER LIFE SCIENCES I-IV LLC | HESKA CORP | 8,414,717 | 17.4% | EDGAR |