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MKSI - As of  04/30/25, 10:57:38 AM:   113 Insider Transactions.

Sector: Industrial Goods    Industry: Diversified Machinery
Prev Close:$44.88  Avg Vol(3m): 309,119  P/E: 22.60  EPS: 1.98

Email this page to a friend.    Insider Transactions for MKSI

Buy/Sell* Filed Date Subject Symbol Acquirer Pct Owned Details
B 2020-02-14 12:07:09.0 MKS INSTRUMENTS INC MKSI Capital International Investors 7.9% view
B 2020-02-12 07:57:13.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 9.31% view
B 2020-02-05 12:16:27.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 9.5% view
B 2020-01-30 10:24:01.0 MKS INSTRUMENTS INC MKSI WELLINGTON MANAGEMENT GROUP LLP 7.03% view
S 2019-02-12 09:47:37.0 MKS INSTRUMENTS INC MKSI WELLINGTON MANAGEMENT GROUP LLP 4.47% view
B 2019-02-11 13:16:59.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 9.14% view
S 2019-02-06 15:04:44.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 9.2% view
B 2018-02-09 11:28:19.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 8.66% view
S 2018-02-09 09:47:32.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 4.89% view
S 2018-02-08 11:39:14.0 MKS INSTRUMENTS INC MKSI WELLINGTON MANAGEMENT GROUP LLP 5.14% view
S 2018-01-23 14:16:37.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 11.0% view
S 2017-10-10 10:07:02.0 MKS INSTRUMENTS INC MKSI WELLINGTON MANAGEMENT GROUP LLP 5.27% view
B 2017-02-10 11:14:48.0 MKS INSTRUMENTS INC MKSI WELLINGTON MANAGEMENT GROUP LLP 10.46% view
B 2017-02-10 09:24:43.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 8.37% view
B 2017-02-09 10:44:23.0 MKS INSTRUMENTS INC MKSI WELLINGTON MANAGEMENT GROUP LLP 9.97% view
B 2017-02-09 08:54:57.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 7.89% view
S 2017-02-01 13:01:02.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LP 4.35% view
B 2017-01-12 17:08:50.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 11.5% view
B 2016-10-07 16:13:48.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 10.3% view
B 2016-02-10 09:20:10.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 7.43% view
B 2016-02-09 16:22:31.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 7.61% view
B 2016-01-26 16:40:23.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 9.3% view
S 2016-01-19 14:23:05.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 9.13% view
B 2015-02-11 10:07:48.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 6.6% view
B 2015-02-05 09:31:19.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 6.81% view
B 2015-01-22 14:24:34.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 8.7% view
S 2015-01-13 15:09:46.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 12.7% view
B 2014-02-11 12:47:59.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 6.47% view
B 2014-02-10 16:29:20.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 6.3% view
S 2014-02-05 13:05:36.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 14.91% view
B 2014-01-29 21:44:47.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 8.7% view
S 2014-01-16 15:52:03.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 0.0% view
B 2014-01-13 12:11:48.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 15.0% view
B 2013-02-12 11:01:25.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 5.88% view
S 2013-02-11 17:15:00.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 5.68% view
S 2013-02-07 18:51:36.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 7.74% view
S 2013-01-24 11:07:20.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 5.17% view
S 2013-01-14 14:31:22.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 13.4% view
S 2012-02-14 08:30:23.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 6.37% view
S 2012-02-10 08:15:39.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 8.1% view
B 2012-02-10 07:35:06.0 MKS INSTRUMENTS INC MKSI VANGUARD GROUP INC 5.24% view
S 2012-01-20 15:38:17.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 6.27% view
B 2012-01-18 15:18:32.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 14.25% view
S 2011-02-11 14:19:03.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 6.97% view
S 2011-02-11 11:54:40.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 2.7% view
S 2011-02-11 11:54:23.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 2.7% view
B 2011-02-07 13:57:28.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 8.78% view
B 2011-01-21 10:16:30.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 9.75% view
S 2011-01-14 13:36:38.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 14.16% view
S 2010-02-16 15:10:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 6.2% view
S 2010-02-16 15:07:30.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 6.2% view
S 2010-02-08 10:42:31.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS LP 8.13% view
B 2010-01-29 14:57:35.0 MKS INSTRUMENTS INC MKSI BlackRock Inc 8.41% view
S 2010-01-25 15:55:21.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 14.68% view
B 2010-01-22 14:58:12.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 9.1% view
B 2009-02-09 12:56:19.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS INC 8.64% view
B 2009-02-05 13:31:48.0 MKS INSTRUMENTS INC MKSI BARCLAYS GLOBAL INVESTORS NA 4.38% view
B 2009-01-26 15:11:30.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 15.37% view
B 2009-01-09 16:31:33.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 6.33% view
B 2008-02-19 17:16:38.0 MKS INSTRUMENTS INC MKSI KORNITZER CAPITAL MANAGEMENT INC 5.57% view
S 2008-02-07 12:00:28.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 8.5% view
S 2008-02-07 11:56:23.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 8.5% view
B 2008-02-06 10:55:14.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS INC 7.71% view
S 2008-02-05 17:29:24.0 MKS INSTRUMENTS INC MKSI BARCLAYS GLOBAL INVESTORS NA 2.76% view
B 2008-01-30 12:39:00.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 14.46% view
S 2007-10-10 13:12:41.0 MKS INSTRUMENTS INC MKSI FMR LLC n/a view
B 2007-09-07 13:53:11.0 MKS INSTRUMENTS INC MKSI ROYCE & ASSOCIATES LLC 11.1% view
S 2007-02-14 16:56:40.0 MKS INSTRUMENTS INC MKSI FMR CORP n/a view
S 2007-02-13 10:27:48.0 MKS INSTRUMENTS INC MKSI PRICE T ROWE ASSOCIATES INC 2.1% view
S 2007-02-12 11:58:59.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 11.7% view
S 2007-02-12 11:58:27.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 11.7% view
S 2007-02-08 19:39:38.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS INC 6.62% view
B 2007-02-01 20:24:52.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS INC 6.62% view
B 2007-01-23 16:27:54.0 MKS INSTRUMENTS INC MKSI BARCLAYS GLOBAL INVESTORS NA 4.16% view
S 2007-01-17 16:03:17.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 4.9% view
S 2006-12-22 16:03:19.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 11.7% view
B 2006-12-22 16:00:29.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 11.7% view
S 2006-12-20 15:22:54.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 6.2% view
S 2006-12-11 17:11:45.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 7.4% view
S 2006-10-12 16:21:19.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 9.3% view
S 2006-09-08 16:51:33.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 10.4% view
S 2006-08-14 20:33:49.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 11.5% view
S 2006-08-02 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 26.1% view
S 2006-06-28 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 27.3% view
S 2006-06-01 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 28.9% view
S 2006-05-10 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 30.8% view
S 2006-04-06 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 32.0% view
S 2006-03-10 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 33.4% view
S 2006-02-14 00:00:00.0 MKS INSTRUMENTS INC MKSI FMR CORP n/a view
B 2006-02-14 00:00:00.0 MKS INSTRUMENTS INC MKSI PRICE T ROWE ASSOCIATES INC 6.1% view
S 2006-02-13 00:00:00.0 MKS INSTRUMENTS INC MKSI TCW GROUP INC 2.5% view
S 2006-02-09 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 8.6% view
B 2006-02-06 00:00:00.0 MKS INSTRUMENTS INC MKSI DIMENSIONAL FUND ADVISORS INC 5.16% view
B 2005-06-10 00:00:00.0 MKS INSTRUMENTS INC MKSI FMR CORP n/a view
B 2005-02-15 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 17.8% view
B 2005-02-15 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 17.8% view
B 2005-02-14 00:00:00.0 MKS INSTRUMENTS INC MKSI TCW GROUP INC 5.7% view
S 2005-02-11 00:00:00.0 MKS INSTRUMENTS INC MKSI PRICE T ROWE ASSOCIATES INC 5.1% view
S 2004-02-13 00:00:00.0 MKS INSTRUMENTS INC MKSI SNYDER JENNIFER C 4.1% view
S 2004-02-13 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 9.8% view
S 2004-02-13 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 8.5% view
B 2004-02-09 00:00:00.0 MKS INSTRUMENTS INC MKSI PRICE T ROWE ASSOCIATES INC 5.7% view
S 2004-01-28 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 39.2% view
S 2003-10-21 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 51.5% view
S 2003-08-07 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 51.5% view
S 2003-02-12 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 12.1% view
B 2003-02-12 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI CLAIRE R 10.6% view
B 2003-02-12 00:00:00.0 MKS INSTRUMENTS INC MKSI SNYDER JENNIFER C 6.7% view
S 2002-02-11 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 20.74% view
B 2002-02-08 00:00:00.0 MKS INSTRUMENTS INC MKSI EMERSON ELECTRIC CO 54.0% view
B 2001-05-08 00:00:00.0 MKS INSTRUMENTS INC MKSI KOPP INVESTMENT ADVISORS INC n/a view
S 2001-02-14 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 30.1% view
B 2000-02-11 00:00:00.0 MKS INSTRUMENTS INC MKSI BERTUCCI JOHN R 35.7% view
* Institutions do not report transaction buy/sell types directly. To help members better understand the transactions, this column is filled by InsiderCow's best-effort interpretations.