MKS Instruments

MKSI13F as of Jun 30, 2026 · next update ~Nov 14

Limited coverage

Only 1 fund we track owns this stock, so quarterly sentiment and aggregates may be sparse.

Who's buying MKSI

Top funds mostly trimmed MKS Instruments in Q2 (Apr⁠–⁠Jun)

Buying:

FundsInsidersCongress

Top funds
0 of 1 bought more, 1 sold some. Largest: Maverick Capital, $912K (0% of its portfolio).
Insiders
No buys, 32 sales in 12 months.
Congress
No trades disclosed in the last 12 months.

1 fund$911,840 held0.0% avg. weightQ2: 0 bought / 1 sold

13F reports are a snapshot as of Jun 30, 2026; funds may have traded since. Insiders often sell for personal reasons (taxes, diversification, planned sales).

Share price · market data, not from 13F reports

Q2 2026

Insider trades (Form 4)

Last 2 years · 46 filings

Date	Insider	Type	Shares	Price	Value
Sep 1, 2026	Elizabeth Mora Director	Sold	300	$250.96	$75K
Aug 14, 2026	John Tseng-chung Lee President & CEO	Sold	10,000	$302.01	$3.02M
Aug 3, 2026	John Edward Williams VP	Sold	457	$288.31	$132K
Jun 12, 2026	James Alan Schreiner VP & COO	Sold	3,500	$345.82	$1.21M
Jun 10, 2026	James Alan Schreiner VP & COO	Sold	781	$317.42	$248K
Jun 5, 2026	Michelle M Mccarthy VP & CAO	Sold	2,434	$315.23	$767K
Jun 1, 2026	David Philip Henry VP	Sold	6,000	$314.43	$1.89M
Jun 1, 2026	Elizabeth Mora Director	Sold	300	$318.02	$95K
May 27, 2026	Joseph B Donahue Director	Sold	2,100	$327.95	$689K
May 27, 2026	Gerald G Colella Director	Sold	20,000	$333.40	$6.67M
May 26, 2026	David Philip Henry VP	Sold	2,500	$330.50	$826K
May 22, 2026	Ramakumar Mayampurath VP & CFO	Sold	8,810	$315.48	$2.78M
May 22, 2026	John Tseng-chung Lee President & CEO	Sold	10,000	$315.48	$3.15M
May 18, 2026	Peter Cannone III Director	Sold	1,350	$303.40	$410K
May 14, 2026	Jacqueline F Moloney Director	Sold	1,000	$312.20	$312K
May 13, 2026	Jacqueline F Moloney Director	Sold	1,400	$318.99	$447K
May 11, 2026	Eric Robert Taranto VP	Sold	2,849	$319.93	$911K
May 11, 2026	Kathleen Flaherty Burke VP & Secretary	Sold	4,355	$319.94	$1.39M
Mar 12, 2026	Jacqueline F Moloney Director	Sold	340	$213.77	$73K
Mar 6, 2026	Eric Robert Taranto VP	Sold	4,568	$220.52	$1.01M
Mar 2, 2026	Elizabeth Mora Director	Sold	300	$239.44	$72K
Feb 24, 2026	James Alan Schreiner VP & COO	Sold	4,100	$255.00	$1.05M
Feb 20, 2026	Gerald G Colella Director	Sold	20,000	$253.43	$5.07M
Feb 20, 2026	Peter Cannone III Director	Sold	1,250	$258.06	$323K
Feb 20, 2026	Eric Robert Taranto VP	Sold	1,453	$247.55	$360K
Feb 20, 2026	David Philip Henry VP	Sold	2,000	$261.56	$523K
Feb 20, 2026	Michelle M Mccarthy VP & CAO	Sold	1,466	$250.00	$367K
Feb 20, 2026	Jacqueline F Moloney Director	Sold	829	$247.55	$205K
Feb 20, 2026	John Edward Williams VP	Sold	2,043	$256.41	$524K
Feb 20, 2026	Kathleen Flaherty Burke VP & Secretary	Sold	4,254	$250.00	$1.06M
Feb 20, 2026	John Tseng-chung Lee President & CEO	Sold	30,000	$256.78	$7.70M
Dec 2, 2025	Elizabeth Mora Director	Sold	300	$158.81	$48K
Oct 22, 2025	James Alan Schreiner VP & COO	Sold	711	$138.68	$99K
Oct 1, 2025	Jacqueline F Moloney Director	Sold	300	$122.14	$37K
Sep 18, 2025	James Alan Schreiner VP & COO	Sold	838	$124.00	$104K
Sep 18, 2025	David Philip Henry VP	Sold	5,000	$130.00	$650K
Sep 2, 2025	Elizabeth Mora Director	Sold	300	$99.85	$30K
Aug 1, 2025	Jacqueline F Moloney Director	Sold	300	$92.10	$28K
Jul 7, 2025	James Alan Schreiner VP & COO	Sold	957	$102.44	$98K
Jul 3, 2025	David Philip Henry VP	Sold	2,000	$105.00	$210K
Jun 2, 2025	Elizabeth Mora Director	Sold	300	$81.78	$25K
Mar 3, 2025	Elizabeth Mora Director	Sold	275	$92.46	$25K
Mar 3, 2025	Jacqueline F Moloney Director	Sold	300	$92.46	$28K
Feb 18, 2025	Gerard G Colella Director	Sold	8,000	$104.53	$836K
Dec 10, 2024	Jacqueline F Moloney Director	Sold	300	$114.80	$34K
Dec 2, 2024	Elizabeth Mora Director	Sold	275	$113.41	$31K