MKS Instruments
Insider trading & Transactions

Last updated: 29 Jun 2005

Transaction	Date	Insider	Security	Shares	Price per share	Total value
Option	29 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	29 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	22 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Sale	22 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	22 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	15 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Sale	15 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	15 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	13 Jun 2005	VALENTE LOUIS P director director	Director Stock option (right to buy)	1,810	N/A	N/A
Option	13 Jun 2005	VALENTE LOUIS P director director	Common	1,810	N/A	N/A
Option	8 Jun 2005	COLELLA GERARD G director director	Common	2,500	N/A	N/A
Option	8 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Sale	8 Jun 2005	COLELLA GERARD G director director	Common	2,500	N/A	N/A
Sale	8 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	8 Jun 2005	COLELLA GERARD G director director	Stock Option (right to buy)	2,500	N/A	N/A
Option	8 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Sale	3 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	881	$17.05	$15,021
Sale	1 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	1 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	1 Jun 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Sale	25 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	25 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	25 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	18 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Sale	18 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	18 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	11 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	11 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Sale	11 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	5 May 2005	BERLINGHIERI LEO other: Former CEO and Director other: Former CEO and Director	Stock Option (right to buy)	10,000	N/A	N/A
Option	5 May 2005	BERLINGHIERI LEO other: Former CEO and Director other: Former CEO and Director	Common	10,000	N/A	N/A
Sale	5 May 2005	BERLINGHIERI LEO other: Former CEO and Director other: Former CEO and Director	Common	10,000	N/A	N/A
Option	4 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Sale	4 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	4 May 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	27 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	27 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Sale	27 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	20 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	20 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	13 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	13 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Sale	6 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	6 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A
Option	6 Apr 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Sale	1 Apr 2005	BERTUCCI CLAIRE R other: Spouse of Chairman other: Spouse of Chairman	Common	471	$15.88	$7,479
Sale	1 Apr 2005	BERTUCCI JOHN R director director	Common	471	N/A	N/A
Sale	30 Mar 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	30 Mar 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Common	1,800	N/A	N/A
Option	30 Mar 2005	WEIGNER RONALD officer: V.P., C.F.O & Treasurer officer: V.P., C.F.O & Treasurer	Stock Option (right to buy)	1,800	N/A	N/A

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Insider trading

Monitoring trades made by the management members or major shareholders of companies may help create a sharper picture of what is happening inside the companies. Base your decisions on buys or sells of the people involved and do the right thing at the right time.

Who is insider?

Every director or senior officer, as well as any other entity or individual owning more than 10% of the company’s shares on the stock market, is called an insider. Such people or entities are allowed to buy/sell the company's shares under strictly controlled conditions. Key premise here is that none of them can make trades based on non-public information about the company.

MKS Instruments Insider trading & Transactions

Insider trading

Who is insider?

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MKS Instruments
Insider trading & Transactions