| SC 13G/A | 2013-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | IDEXX LABORATORIES INC /DE | 6,493,590 | 11.8% | EDGAR |
| SC 13G/A | 2013-02-07 | PRICE T ROWE ASSOCIATES INC /MD/ | IDEXX LABORATORIES INC /DE | 4,970,610 | 9.0% | EDGAR |
| SC 13G/A | 2013-02-07 | BROWN ADVISORY INC | IDEXX LABORATORIES INC /DE | 2,744,152 | 5.0% | EDGAR |
| SC 13G/A | 2013-02-05 | BLAIR WILLIAM & CO/IL | IDEXX LABORATORIES INC /DE | 2,334,899 | 4.3% | EDGAR |
| SC 13G | 2013-01-30 | BlackRock Inc. | IDEXX LABORATORIES INC /DE | 2,903,118 | 5.3% | EDGAR |
| SC 13G/A | 2012-08-09 | BlackRock Inc. | IDEXX LABORATORIES INC /DE | 2,828,172 | 5.0% | EDGAR |
| SC 13G/A | 2012-04-09 | BROWN ADVISORY INC | IDEXX LABORATORIES INC /DE | 2,857,403 | 5.1% | EDGAR |
| SC 13G | 2012-02-22 | BROWN ADVISORY INC | IDEXX LABORATORIES INC /DE | 2,842,540 | 5.1% | EDGAR |
| SC 13G/A | 2012-02-15 | Neuberger Berman Group LLC | IDEXX LABORATORIES INC /DE | 3,322,258 | 5.9% | EDGAR |
| SC 13G/A | 2012-02-14 | RUANE, CUNNIFF & GOLDFARB INC | IDEXX LABORATORIES INC /DE | 5,620,168 | 10.0% | EDGAR |
| SC 13G/A | 2012-02-14 | BAMCO INC /NY/ | IDEXX LABORATORIES INC /DE | 3,229,063 | 5.8% | EDGAR |
| SC 13G/A | 2012-02-13 | BlackRock Inc. | IDEXX LABORATORIES INC /DE | 2,891,699 | 5.2% | EDGAR |
| SC 13G/A | 2012-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | IDEXX LABORATORIES INC /DE | 4,926,830 | 8.7% | EDGAR |
| SC 13G/A | 2012-01-30 | BLAIR WILLIAM & CO/IL | IDEXX LABORATORIES INC /DE | 2,837,607 | 5.0% | EDGAR |
| SC 13G/A | 2011-06-10 | RUANE, CUNNIFF & GOLDFARB INC | IDEXX LABORATORIES INC /DE | 6,907,040 | 12.0% | EDGAR |
| SC 13G/A | 2011-02-14 | RUANE, CUNNIFF & GOLDFARB INC | IDEXX LABORATORIES INC /DE | 9,934,555 | 17.3% | EDGAR |
| SC 13G/A | 2011-02-14 | BAMCO INC /NY/ | IDEXX LABORATORIES INC /DE | 3,869,013 | 7.1% | EDGAR |
| SC 13G/A | 2011-02-14 | Neuberger Berman Group LLC | IDEXX LABORATORIES INC /DE | 3,508,676 | 6.1% | EDGAR |
| SC 13G | 2011-02-09 | PRICE T ROWE ASSOCIATES INC /MD/ | IDEXX LABORATORIES INC /DE | 4,468,830 | 7.7% | EDGAR |
| SC 13G/A | 2011-02-08 | BLAIR WILLIAM & CO/IL | IDEXX LABORATORIES INC /DE | 2,640,856 | 4.6% | EDGAR |