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$MKSI

$304.99 +$7.54 (2.53%)

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Insider Transactions

Insider Transaction Summary

IV Participations, S.a r.l. SICAR CEP

6,482,732 shares

Net: 0 B/S: -

Holdings II L.L.C. Carlyle

6,482,732 shares

Net: 0 B/S: -

John Tseng-Chung Lee

144,696 shares

Net: +31,144 B/S: 3.82

JOHN R BERTUCCI

67,275 shares

Net: 0 B/S: -

Kathleen Flaherty Burke

49,439 shares

Net: -758 B/S: 1.62

GERALD G COLELLA

39,553 shares

Net: -19,682 B/S: 0.04

Cristina Amon

29,283 shares

Net: 0 B/S: -

James Alan Schreiner

22,701 shares

Net: +2,119 B/S: 2.2

Elizabeth Mora

19,145 shares

Net: -418 B/S: 0.65

Mark Milton Gitin

17,954 shares

Net: 0 B/S: -

Brian Charles Quirk

17,641 shares

Net: 0 B/S: -

Raj Batra

16,227 shares

Net: +782 B/S: ∞

SETH H BAGSHAW

12,613 shares

Net: 0 B/S: -

Eric Robert Taranto

12,596 shares

Net: -4,555 B/S: 0.79

Michelle M Warner

10,852 shares

Net: 0 B/S: -

David Philip Henry

10,422 shares

Net: -9,102 B/S: 0.68

Joseph B Donahue

10,033 shares

Net: -1,318 B/S: 0.37

ROBERT R ANDERSON

9,296 shares

Net: 0 B/S: -

Jacqueline F Moloney

8,775 shares

Net: -3,087 B/S: 0.2

GERARD G COLELLA

8,217 shares

Net: 0 B/S: -

PETER III CANNONE

7,794 shares

Net: -1,818 B/S: 0.3

ROBERT J PHILLIPPY

7,355 shares

Net: 0 B/S: -

John R Abrams

6,864 shares

Net: 0 B/S: -

RICHARD S CHUTE

6,616 shares

Net: 0 B/S: -

Rick D Hess

5,468 shares

Net: 0 B/S: -

John Edward Williams

5,381 shares

Net: +3,063 B/S: 3.64

WISSAM G JABRE

5,270 shares

Net: +782 B/S: ∞

JANICE K HENRY

1,989 shares

Net: 0 B/S: -

Gregory R Beecher

1,981 shares

Net: 0 B/S: -

GEOFFREY WILD

1,813 shares

Net: 0 B/S: -

PETER HANLEY

1,501 shares

Net: 0 B/S: -

Dennis L Werth

1,244 shares

Net: 0 B/S: -

Michelle M McCarthy

2 shares

Net: -1,818 B/S: 0.86

Ramakumar Mayampurath

1 shares

Net: +10,456 B/S: 2.77

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
IV Participations, S.a r.l. SICAR CEP	6,482,732	0	-
Holdings II L.L.C. Carlyle	6,482,732	0	-
John Tseng-Chung Lee	144,696	+31,144	3.82
JOHN R BERTUCCI	67,275	0	-
Kathleen Flaherty Burke	49,439	-758	1.62
GERALD G COLELLA	39,553	-19,682	0.04
Cristina Amon	29,283	0	-
James Alan Schreiner	22,701	+2,119	2.2
Elizabeth Mora	19,145	-418	0.65
Mark Milton Gitin	17,954	0	-
Brian Charles Quirk	17,641	0	-
Raj Batra	16,227	+782	∞
SETH H BAGSHAW	12,613	0	-
Eric Robert Taranto	12,596	-4,555	0.79
Michelle M Warner	10,852	0	-
David Philip Henry	10,422	-9,102	0.68
Joseph B Donahue	10,033	-1,318	0.37
ROBERT R ANDERSON	9,296	0	-
Jacqueline F Moloney	8,775	-3,087	0.2
GERARD G COLELLA	8,217	0	-
PETER III CANNONE	7,794	-1,818	0.3
ROBERT J PHILLIPPY	7,355	0	-
John R Abrams	6,864	0	-
RICHARD S CHUTE	6,616	0	-
Rick D Hess	5,468	0	-
John Edward Williams	5,381	+3,063	3.64
WISSAM G JABRE	5,270	+782	∞
JANICE K HENRY	1,989	0	-
Gregory R Beecher	1,981	0	-
GEOFFREY WILD	1,813	0	-
PETER HANLEY	1,501	0	-
Dennis L Werth	1,244	0	-
Michelle M McCarthy	2	-1,818	0.86
Ramakumar Mayampurath	1	+10,456	2.77

Individual Transactions

June 10, 2026

James Alan Schreiner

Open Market Sale

Change: -781

Price: $317.42

Shares: 22,701

Value: -$247,905

Insider	Filing Date	Transaction	Shares	Change	Price	Value
James Alan Schreiner	Jun 11	Open Market Sale (S) Market Sale	22,701	-781	$317.42	-$247,905

June 05, 2026

Michelle M McCarthy

Open Market Sale

Change: -2,434

Price: $315.23

Shares: 2

Value: -$767,269

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Michelle M McCarthy	Jun 08	Open Market Sale (S) Market Sale	2	-2,434	$315.23	-$767,269

June 01, 2026

Elizabeth Mora

Open Market Sale

Change: -300

Price: $318.02

Shares: 19,145

Value: -$95,406

David Philip Henry

Open Market Sale

Change: -6,000

Price: $314.43

Shares: 10,422

Value: -$1,886,583

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Elizabeth Mora	Jun 02	Open Market Sale (S) Market Sale	19,145	-300	$318.02	-$95,406
David Philip Henry	Jun 02	Open Market Sale (S) Market Sale	10,422	-6,000	$314.43	-$1,886,583

May 27, 2026

Joseph B Donahue

Open Market Sale

Change: -2,100

Price: $327.95

Shares: 10,033

Value: -$688,703

GERALD G COLELLA

Open Market Sale

Change: -464

Price: $330.38

Shares: 39,553

Value: -$153,297

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Joseph B Donahue	May 28	Open Market Sale (S) Market Sale	10,033	-2,100	$327.95	-$688,703
GERALD G COLELLA	May 28	Open Market Sale (S) Market Sale	39,553	-464	$330.38	-$153,297

May 26, 2026

David Philip Henry

Open Market Sale

Change: -2,500

Price: $330.50

Shares: 16,341

Value: -$826,250

Insider	Filing Date	Transaction	Shares	Change	Price	Value
David Philip Henry	May 27	Open Market Sale (S) Market Sale	16,341	-2,500	$330.50	-$826,250

May 22, 2026

Ramakumar Mayampurath

Open Market Sale

Change: -8,810

Price: $315.48

Shares: 1

Value: -$2,779,378

John Tseng-Chung Lee

Open Market Sale

Change: -10,000

Price: $315.48

Shares: 144,696

Value: -$3,154,800

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Ramakumar Mayampurath	May 26	Open Market Sale (S) Market Sale	1	-8,810	$315.48	-$2,779,378
John Tseng-Chung Lee	May 26	Open Market Sale (S) Market Sale	144,696	-10,000	$315.48	-$3,154,800

May 18, 2026

PETER III CANNONE

Open Market Sale

Change: -1,350

Price: $303.40

Shares: 7,794

Value: -$409,590

Insider	Filing Date	Transaction	Shares	Change	Price	Value
PETER III CANNONE	May 19	Open Market Sale (S) Market Sale	7,794	-1,350	$303.40	-$409,590

May 14, 2026

Jacqueline F Moloney

Open Market Sale

Change: -1,000

Price: $312.20

Shares: 8,775

Value: -$312,196

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Jacqueline F Moloney	May 15	Open Market Sale (S) Market Sale	8,775	-1,000	$312.20	-$312,196

May 13, 2026

Jacqueline F Moloney

Open Market Sale

Change: -1,400

Price: $318.99

Shares: 9,775

Value: -$446,586

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Jacqueline F Moloney	May 14	Open Market Sale (S) Market Sale	9,775	-1,400	$318.99	-$446,586

May 11, 2026

Raj Batra

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 16,227

Value: +$0

GERALD G COLELLA

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 8,999

Value: +$0

PETER III CANNONE

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 9,144

Value: +$0

Joseph B Donahue

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 12,133

Value: +$0

Kathleen Flaherty Burke

Open Market Sale

Change: -4,355

Price: $319.94

Shares: 49,439

Value: -$1,393,316

Elizabeth Mora

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 19,445

Value: +$0

WISSAM G JABRE

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 5,270

Value: +$0

Jacqueline F Moloney

Grant/Award Acquisition

Change: +782

Price: $0.00

Shares: 11,175

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Raj Batra	May 12	Grant/Award Acquisition (A) Compensation/Award	16,227	+782	$0.00	+$0
GERALD G COLELLA	May 12	Grant/Award Acquisition (A) Compensation/Award	8,999	+782	$0.00	+$0
PETER III CANNONE	May 12	Grant/Award Acquisition (A) Compensation/Award	9,144	+782	$0.00	+$0
Joseph B Donahue	May 12	Grant/Award Acquisition (A) Compensation/Award	12,133	+782	$0.00	+$0
Kathleen Flaherty Burke	May 12	Open Market Sale (S) Market Sale	49,439	-4,355	$319.94	-$1,393,316
Elizabeth Mora	May 12	Grant/Award Acquisition (A) Compensation/Award	19,445	+782	$0.00	+$0
WISSAM G JABRE	May 12	Grant/Award Acquisition (A) Compensation/Award	5,270	+782	$0.00	+$0
Jacqueline F Moloney	May 12	Grant/Award Acquisition (A) Compensation/Award	11,175	+782	$0.00	+$0