Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 85 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

85 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Feb. 22, 2024 MKSI S 1,000 $124.56 $124,560 1 Direct -99.90% Disposed 125.2% (price as of 2026-10-05)
Feb. 22, 2024 MKSI S 11,612 $124.02 $1,440,120 1,001 Direct -92.06% Disposed 126.2% (price as of 2026-10-05)
Feb. 22, 2024 MKSI S 20,253 $122.79 $2,486,866 12,613 Direct -61.62% Disposed 128.4% (price as of 2026-10-05)
Sept. 6, 2023 MKSI S 7,073 $97.66 $690,749 20,547 Direct -25.61% Disposed 187.2% (price as of 2026-10-05)
Sept. 6, 2023 MKSI S 17,927 $97.16 $1,741,787 27,620 Direct -39.36% Disposed 188.7% (price as of 2026-10-05)
April 15, 2021 MKSI S 10b5-1 200 $188.40 $37,680 19,410 Direct -1.02% Disposed 48.9% (price as of 2026-10-05)
April 15, 2021 MKSI S 10b5-1 4,955 $187.78 $930,450 19,610 Direct -20.17% Disposed 49.4% (price as of 2026-10-05)
April 15, 2021 MKSI S 10b5-1 1,741 $186.65 $324,958 24,565 Direct -6.62% Disposed 50.3% (price as of 2026-10-05)
April 15, 2021 MKSI S 10b5-1 704 $185.39 $130,515 26,306 Direct -2.61% Disposed 51.3% (price as of 2026-10-05)
April 15, 2021 MKSI S 10b5-1 1,400 $184.36 $258,104 27,010 Direct -4.93% Disposed 52.1% (price as of 2026-10-05)
July 23, 2020 MKSI S 10b5-1 2,062 $123.57 $254,801 22,102 Direct -8.53% Disposed 127.0% (price as of 2026-10-05)
July 23, 2020 MKSI S 10b5-1 1,493 $125.09 $186,759 20,609 Direct -6.76% Disposed 124.2% (price as of 2026-10-05)
July 23, 2020 MKSI S 10b5-1 1,440 $126.07 $181,541 19,169 Direct -6.99% Disposed 122.5% (price as of 2026-10-05)
July 22, 2020 MKSI S 10b5-1 5 $123.00 $615 24,164 Direct -0.02% Disposed 128.0% (price as of 2026-10-05)
July 6, 2020 MKSI S 10b5-1 5,000 $116.84 $584,200 24,169 Direct -17.14% Disposed 140.1% (price as of 2026-10-05)

Showing latest 100 of 324 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (2,762) · · 2,762 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (6,791) · · 6,791 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (2,430) · · 2,430 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (4,129) · · 4,129 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (1,525) · · 1,525 Disposed
Feb. 15, 2024 MKSI Restricted Stock Unit Common Stock (3,729) · · 3,729 Disposed
Feb. 5, 2024 MKSI Restricted Stock Unit Common Stock (20,375) · · 20,375 Acquired
Dec. 1, 2023 MKSI Restricted Stock Unit Common Stock (350) · · 350 Disposed
Dec. 1, 2023 MKSI Restricted Stock Unit Common Stock (349) · · 349 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (2,431) · · 2,431 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (4,303) · · 4,303 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (1,525) · · 1,525 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (3,729) · · 3,729 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (2,180) · · 2,180 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (3,837) · · 3,837 Disposed
Feb. 15, 2023 MKSI Restricted Stock Unit Common Stock (8,637) · · 8,637 Acquired
Feb. 8, 2023 MKSI Restricted Stock Unit Common Stock (12,912) · · 12,912 Acquired
Dec. 2, 2022 MKSI Restricted Stock Unit Common Stock (315) · · 315 Disposed
Dec. 2, 2022 MKSI Restricted Stock Unit Common Stock (308) · · 308 Disposed
Oct. 28, 2022 MKSI Restricted Stock Unit Common Stock (4,358) · · 4,358 Disposed
April 29, 2022 MKSI Restricted Stock Unit Common Stock (7,600) · · 7,600 Acquired
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (1,525) · · 1,525 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (3,885) · · 3,885 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (2,180) · · 2,180 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (3,837) · · 3,837 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (2,643) · · 2,643 Disposed
Feb. 15, 2022 MKSI Restricted Stock Unit Common Stock (2,941) · · 2,941 Disposed
Jan. 21, 2022 MKSI Restricted Stock Unit Common Stock (11,658) · · 11,658 Acquired
Dec. 3, 2021 MKSI Restricted Stock Unit Common Stock (194) · · 194 Disposed
Dec. 3, 2021 MKSI Restricted Stock Unit Common Stock (325) · · 325 Disposed
Oct. 28, 2021 MKSI Restricted Stock Unit Common Stock (4,358) · · 4,358 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (4,769) · · 4,769 Acquired
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (2,202) · · 2,202 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (1,871) · · 1,871 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (2,942) · · 2,942 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (2,643) · · 2,643 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (3,999) · · 3,999 Disposed
Feb. 16, 2021 MKSI Restricted Stock Unit Common Stock (2,180) · · 2,180 Disposed
Jan. 25, 2021 MKSI Restricted Stock Unit Common Stock (11,998) · · 11,998 Acquired
Dec. 4, 2020 MKSI Restricted Stock Unit Common Stock (277) · · 277 Disposed
Dec. 4, 2020 MKSI Restricted Stock Unit Common Stock (249) · · 249 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (2,643) · · 2,643 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (3,066) · · 3,066 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (1,871) · · 1,871 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (2,202) · · 2,202 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (2,835) · · 2,835 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (3,430) · · 3,430 Disposed
Feb. 18, 2020 MKSI Restricted Stock Unit Common Stock (6,817) · · 6,817 Acquired
Jan. 27, 2020 MKSI Restricted Stock Unit Common Stock (9,197) · · 9,197 Acquired
Dec. 6, 2019 MKSI Restricted Stock Unit Common Stock (336) · · 336 Disposed
Dec. 6, 2019 MKSI Restricted Stock Unit Common Stock (187) · · 187 Disposed
Dec. 6, 2019 MKSI Restricted Stock Unit Common Stock (159) · · 159 Disposed
Dec. 6, 2019 MKSI Restricted Stock Unit Common Stock (145) · · 145 Disposed
Dec. 6, 2019 MKSI Restricted Stock Unit Common Stock (120) · · 120 Disposed
Oct. 28, 2019 MKSI Restricted Stock Unit Common Stock (8,716) · · 8,716 Acquired
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (1,950) · · 1,950 Disposed
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (2,295) · · 2,295 Disposed
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (2,954) · · 2,954 Disposed
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (3,575) · · 3,575 Disposed
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (4,516) · · 4,516 Disposed
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (6,914) · · 6,914 Disposed
Feb. 15, 2019 MKSI Restricted Stock Unit Common Stock (8,264) · · 8,264 Acquired
Jan. 28, 2019 MKSI Restricted Stock Unit Common Stock (3,240) · · 3,240 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (5,234) · · 5,234 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (3,783) · · 3,783 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (6,914) · · 6,914 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (4,515) · · 4,515 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (2,954) · · 2,954 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (3,574) · · 3,574 Disposed
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (5,851) · · 5,851 Acquired
Feb. 15, 2018 MKSI Restricted Stock Unit Common Stock (10,126) · · 10,126 Acquired
Feb. 12, 2018 MKSI Restricted Stock Unit Common Stock (2,570) · · 2,570 Disposed
May 11, 2017 MKSI Restricted Stock Unit Common Stock (5,930) · · 5,930 Disposed
Feb. 15, 2017 MKSI Restricted Stock Unit Common Stock (4,515) · · 4,515 Disposed
Feb. 15, 2017 MKSI Restricted Stock Unit Common Stock (6,913) · · 6,913 Disposed
Feb. 15, 2017 MKSI Restricted Stock Unit Common Stock (3,783) · · 3,783 Disposed
Feb. 15, 2017 MKSI Restricted Stock Unit Common Stock (5,234) · · 5,234 Disposed
Feb. 15, 2017 MKSI Restricted Stock Unit Common Stock (8,863) · · 8,863 Acquired
Feb. 15, 2017 MKSI Restricted Stock Unit Common Stock (13,294) · · 13,294 Acquired
Feb. 13, 2017 MKSI Restricted Stock Unit Common Stock (3,191) · · 3,191 Disposed
Feb. 10, 2017 MKSI Restricted Stock Unit Common Stock (4,305) · · 4,305 Disposed
Feb. 10, 2017 MKSI Restricted Stock Unit Common Stock (6,457) · · 6,457 Disposed
July 5, 2016 MKSI Restricted Stock Unit Common Stock (5,930) · · 5,930 Acquired
Feb. 25, 2016 MKSI Restricted Stock Unit Common Stock (3,715) · · 3,715 Disposed
Feb. 25, 2016 MKSI Restricted Stock Unit Common Stock (5,052) · · 5,052 Disposed
Feb. 16, 2016 MKSI Restricted Stock Unit Common Stock (13,546) · · 13,546 Acquired
Feb. 16, 2016 MKSI Restricted Stock Unit Common Stock (23,931) · · 23,931 Acquired
Feb. 16, 2016 MKSI Restricted Stock Unit Common Stock (3,782) · · 3,782 Disposed
Feb. 16, 2016 MKSI Restricted Stock Unit Common Stock (5,234) · · 5,234 Disposed
Feb. 10, 2016 MKSI Restricted Stock Unit Common Stock (4,304) · · 4,304 Disposed
Feb. 10, 2016 MKSI Restricted Stock Unit Common Stock (6,457) · · 6,457 Disposed
Jan. 26, 2016 MKSI Restricted Stock Unit Common Stock (3,447) · · 3,447 Disposed
Feb. 25, 2015 MKSI Restricted Stock Unit Common Stock (3,715) · · 3,715 Disposed
Feb. 25, 2015 MKSI Restricted Stock Unit Common Stock (5,052) · · 5,052 Disposed
Feb. 23, 2015 MKSI Restricted Stock Unit Common Stock (2,119) · · 2,119 Disposed
Feb. 23, 2015 MKSI Restricted Stock Unit Common Stock (3,115) · · 3,115 Disposed
Feb. 17, 2015 MKSI Restricted Stock Unit Common Stock (19,149) · · 19,149 Acquired
Feb. 17, 2015 MKSI Restricted Stock Unit Common Stock (11,348) · · 11,348 Acquired
Feb. 10, 2015 MKSI Restricted Stock Unit Common Stock (4,304) · · 4,304 Disposed
Feb. 10, 2015 MKSI Restricted Stock Unit Common Stock (6,456) · · 6,456 Disposed

Showing latest 100 of 138 transactions

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 2 holdings

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Jan. 8, 2010 MKSI Common Stock 11,482 Direct
Jan. 8, 2010 MKSI Restricted Stock Unit→ Common Stock (13,800) 13,800 Direct

Compensation (DEF 14A)

08

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MKSI

PFO
Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2024 $650,500 · · · · · $20,332 $670,832
2023 $623,775 · · · $482,802 · $40,546 $3,040,068
2022 $615,774 · · · $554,154 · $44,042 $3,110,090

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.