| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13D/A | 2007-01-17 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 2,751,143 | 4.9% | EDGAR |
| SC 13G/A | 2006-12-22 | BERTUCCI JOHN R | MKS INSTRUMENTS INC | 6,624,666 | 11.7% | EDGAR |
| SC 13G/A | 2006-12-22 | BERTUCCI CLAIRE R | MKS INSTRUMENTS INC | 6,624,666 | 11.7% | EDGAR |
| SC 13D/A | 2006-12-20 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 3,503,569 | 6.2% | EDGAR |
| SC 13D/A | 2006-12-11 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 4,164,299 | 7.4% | EDGAR |
| SC 13D/A | 2006-10-12 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 5,246,881 | 9.3% | EDGAR |
| SC 13D/A | 2006-09-08 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 5,830,679 | 10.4% | EDGAR |
| SC 13D/A | 2006-08-15 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 6,458,589 | 11.5% | EDGAR |
| SC 13D/A | 2006-08-02 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 14,662,470 | 26.1% | EDGAR |
| SC 13D/A | 2006-06-28 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 15,256,872 | 27.3% | EDGAR |
| SC 13D/A | 2006-06-01 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 16,155,817 | 28.9% | EDGAR |
| SC 13D/A | 2006-05-10 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 16,867,591 | 30.8% | EDGAR |
| SC 13D/A | 2006-04-06 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 17,527,120 | 32.0% | EDGAR |
| SC 13D/A | 2006-03-10 | EMERSON ELECTRIC CO | MKS INSTRUMENTS INC | 18,128,478 | 33.4% | EDGAR |
| SC 13G/A | 2006-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | MKS INSTRUMENTS INC | 3,311,113 | 6.1% | EDGAR |
| SC 13G/A | 2006-02-14 | FMR CORP | MKS INSTRUMENTS INC | 6,968,044 | 12.8% | EDGAR |
| SC 13G/A | 2006-02-13 | TCW GROUP INC | MKS INSTRUMENTS INC | 1,374,239 | 2.5% | EDGAR |
| SC 13G/A | 2006-02-09 | BERTUCCI JOHN R | MKS INSTRUMENTS INC | 4,677,882 | 8.6% | EDGAR |
| SC 13G | 2006-02-06 | DIMENSIONAL FUND ADVISORS INC | MKS INSTRUMENTS INC | 2,801,346 | 5.2% | EDGAR |
| SC 13G | 2005-06-10 | FMR CORP | MKS INSTRUMENTS INC | 5,725,847 | 10.6% | EDGAR |