$MKSI

📈 Chart

165 transactions across 24 dates · last 365 days

6-Month Buy/Sell Trend

Buys Sells
2026-04-17
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Williams John Edward EVP & GM, PSD M 1,741 Apr 20
Williams John Edward EVP & GM, PSD F 826 $270 $223K Apr 20
Williams John Edward EVP & GM, PSD M 1,741 Apr 20
2026-04-15
8 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
McCarthy Michelle M SVP & Chief Accounting Officer M 968 Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer M 1,107 Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer M 1,736 Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer F 1,375 $274 $377K Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer A 1,673 Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer M 968 Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer M 1,107 Apr 16
McCarthy Michelle M SVP & Chief Accounting Officer M 1,736 Apr 16
2026-03-12
▼ 1 sell · $73K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Moloney Jacqueline F ▼ Sell 340 $214 $73K Mar 13
2026-03-06
▼ 1 sell · $1.0M
Insider Title Type Shares Price $ Value 10b5-1 Filed
Taranto Eric Robert EVP & GM, VSD ▼ Sell 4,568 $221 $1.0M Mar 9
2026-03-02
▼ 1 sell · $72K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Mora Elizabeth ▼ Sell 300 $239 $72K Plan Mar 3
2026-02-24
▼ 2 sells · $3.6M
⚡ 2 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Schreiner James Alan EVP & COO ▼ Sell 4,100 $255 $1.0M Feb 25
COLELLA GERALD G ▼ Sell 10,000 $254 $2.5M Feb 24
2026-02-20
▼ 13 sells · $13.6M
⚡ 9 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
COLELLA GERALD G ▼ Sell 10,000 $253 $2.5M Feb 24
Burke Kathleen Flaherty EVP, GC & Secretary ▼ Sell 4,254 $250 $1.1M Feb 23
CANNONE PETER III ▼ Sell 1,250 $258 $323K Feb 23
Henry David Philip EVP, Global Str Mktg & GM, MSD ▼ Sell 2,000 $262 $523K Feb 23
Lee John Tseng-Chung President & CEO ▼ Sell 13,310 $256 $3.4M Feb 23
Lee John Tseng-Chung President & CEO ▼ Sell 12,812 $257 $3.3M Feb 23
Lee John Tseng-Chung President & CEO ▼ Sell 1,988 $258 $513K Feb 23
Lee John Tseng-Chung President & CEO ▼ Sell 1,890 $260 $491K Feb 23
Williams John Edward EVP & GM, PSD ▼ Sell 2,043 $256 $524K Feb 23
Moloney Jacqueline F ▼ Sell 829 $248 $205K Feb 23
McCarthy Michelle M VP & Chief Accounting Officer ▼ Sell 650 $250 $162K Feb 23
McCarthy Michelle M VP & Chief Accounting Officer ▼ Sell 816 $250 $204K Feb 23
Taranto Eric Robert EVP & GM, VSD ▼ Sell 1,453 $248 $360K Feb 23
2026-02-17
86 other
⚡ 7 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Burke Kathleen Flaherty EVP, GC & Secretary M 3,451 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 1,788 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 563 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 1,576 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 2,336 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 2,493 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary F 5,318 $261 $1.4M Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary A 3,328 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 3,451 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 1,788 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 563 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 1,576 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 2,336 Feb 18
Burke Kathleen Flaherty EVP, GC & Secretary M 2,493 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 2,406 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 1,247 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 456 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 1,278 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 1,841 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 2,054 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD F 4,097 $261 $1.1M Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD A 2,567 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 2,406 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 1,247 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 456 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 1,278 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 1,841 Feb 18
Henry David Philip EVP, Global Str Mktg & GM, MSD M 2,054 Feb 18
Lee John Tseng-Chung President & CEO M 22,088 Feb 18
Lee John Tseng-Chung President & CEO M 7,654 Feb 18
Lee John Tseng-Chung President & CEO M 3,859 Feb 18
Lee John Tseng-Chung President & CEO M 7,208 Feb 18
Lee John Tseng-Chung President & CEO M 16,989 Feb 18
Lee John Tseng-Chung President & CEO M 12,091 Feb 18
Lee John Tseng-Chung President & CEO F 32,548 $261 $8.5M Feb 18
Lee John Tseng-Chung President & CEO A 15,593 Feb 18
Lee John Tseng-Chung President & CEO M 22,088 Feb 18
Lee John Tseng-Chung President & CEO M 7,654 Feb 18
Lee John Tseng-Chung President & CEO M 3,859 Feb 18
Lee John Tseng-Chung President & CEO M 7,208 Feb 18
Lee John Tseng-Chung President & CEO M 16,989 Feb 18
Lee John Tseng-Chung President & CEO M 12,091 Feb 18
Mayampurath Ramakumar EVP & CFO M 2,958 Feb 18
Mayampurath Ramakumar EVP & CFO M 2,702 Feb 18
Mayampurath Ramakumar EVP & CFO F 2,516 $261 $656K Feb 18
Mayampurath Ramakumar EVP & CFO A 4,279 Feb 18
Mayampurath Ramakumar EVP & CFO M 2,958 Feb 18
Mayampurath Ramakumar EVP & CFO M 2,702 Feb 18
Williams John Edward EVP & GM, PSD M 300 Feb 18
Williams John Edward EVP & GM, PSD M 841 Feb 18
Williams John Edward EVP & GM, PSD M 991 Feb 18
Williams John Edward EVP & GM, PSD M 1,106 Feb 18
Williams John Edward EVP & GM, PSD F 1,195 $261 $312K Feb 18
Williams John Edward EVP & GM, PSD A 1,474 Feb 18
Williams John Edward EVP & GM, PSD M 300 Feb 18
Williams John Edward EVP & GM, PSD M 841 Feb 18
Williams John Edward EVP & GM, PSD M 991 Feb 18
Williams John Edward EVP & GM, PSD M 1,106 Feb 18
Schreiner James Alan EVP & COO M 2,567 Feb 18
Schreiner James Alan EVP & COO M 1,330 Feb 18
Schreiner James Alan EVP & COO M 432 Feb 18
Schreiner James Alan EVP & COO M 1,211 Feb 18
Schreiner James Alan EVP & COO M 1,741 Feb 18
Schreiner James Alan EVP & COO M 1,944 Feb 18
Schreiner James Alan EVP & COO F 4,344 $261 $1.1M Feb 18
Schreiner James Alan EVP & COO A 2,377 Feb 18
Schreiner James Alan EVP & COO M 2,567 Feb 18
Schreiner James Alan EVP & COO M 1,330 Feb 18
Schreiner James Alan EVP & COO M 432 Feb 18
Schreiner James Alan EVP & COO M 1,211 Feb 18
Schreiner James Alan EVP & COO M 1,741 Feb 18
Schreiner James Alan EVP & COO M 1,944 Feb 18
Taranto Eric Robert EVP & GM, VSD M 1,764 Feb 18
Taranto Eric Robert EVP & GM, VSD M 914 Feb 18
Taranto Eric Robert EVP & GM, VSD M 348 Feb 18
Taranto Eric Robert EVP & GM, VSD M 976 Feb 18
Taranto Eric Robert EVP & GM, VSD M 1,167 Feb 18
Taranto Eric Robert EVP & GM, VSD M 1,303 Feb 18
Taranto Eric Robert EVP & GM, VSD F 2,712 $261 $707K Feb 18
Taranto Eric Robert EVP & GM, VSD A 1,759 Feb 18
Taranto Eric Robert EVP & GM, VSD M 1,764 Feb 18
Taranto Eric Robert EVP & GM, VSD M 914 Feb 18
Taranto Eric Robert EVP & GM, VSD M 348 Feb 18
Taranto Eric Robert EVP & GM, VSD M 976 Feb 18
Taranto Eric Robert EVP & GM, VSD M 1,167 Feb 18
Taranto Eric Robert EVP & GM, VSD M 1,303 Feb 18
2026-02-08
7 other
⚡ 7 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Burke Kathleen Flaherty EVP, GC & Secretary A 7,009 Feb 9
Henry David Philip EVP, Global Str Mktg & GM, MSD A 5,522 Feb 9
Lee John Tseng-Chung President & CEO A 50,972 Feb 9
Mayampurath Ramakumar EVP & CFO A 8,878 Feb 9
Williams John Edward EVP & GM, PSD A 2,973 Feb 9
Schreiner James Alan EVP & COO A 5,227 Feb 9
Taranto Eric Robert EVP & GM, VSD A 3,504 Feb 9
2025-12-02
▼ 1 sell · $48K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Mora Elizabeth ▼ Sell 300 $159 $48K Plan Dec 3
2025-11-17
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Mayampurath Ramakumar EVP & CFO M 8,295 Nov 18
Mayampurath Ramakumar EVP & CFO F 2,628 $143 $375K Nov 18
Mayampurath Ramakumar EVP & CFO M 8,295 Nov 18
2025-10-31
16 other
⚡ 2 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Burke Kathleen Flaherty EVP, GC & Secretary M 158 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 52 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 82 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 144 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 341 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary F 777 $144 $112K Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 158 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 52 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 82 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 144 Nov 4
Burke Kathleen Flaherty EVP, GC & Secretary M 341 Nov 4
Lee John Tseng-Chung President & CEO M 352 Nov 4
Lee John Tseng-Chung President & CEO M 1,651 Nov 4
Lee John Tseng-Chung President & CEO F 2,003 $144 $288K Nov 4
Lee John Tseng-Chung President & CEO M 352 Nov 4
Lee John Tseng-Chung President & CEO M 1,651 Nov 4
2025-10-22
▼ 1 sell · $99K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Schreiner James Alan EVP & COO ▼ Sell 711 $139 $99K Plan Oct 23
2025-10-01
▼ 1 sell · $37K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Moloney Jacqueline F ▼ Sell 300 $122 $37K Plan Oct 2
2025-09-18
▼ 2 sells · $754K
⚡ 2 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Henry David Philip EVP, Global Str Mktg & GM, MSD ▼ Sell 5,000 $130 $650K Plan Sep 19
Schreiner James Alan EVP & COO ▼ Sell 838 $124 $104K Plan Sep 19
2025-09-02
▼ 1 sell · $30K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Mora Elizabeth ▼ Sell 300 $100 $30K Plan Sep 3
2025-08-18
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Schreiner James Alan EVP & COO M 2,641 Aug 19
Schreiner James Alan EVP & COO F 1,249 $100 $125K Aug 19
Schreiner James Alan EVP & COO M 2,641 Aug 19
2025-08-15
3 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Williams John Edward EVP & GM, PSD M 947 Aug 18
Williams John Edward EVP & GM, PSD F 308 $105 $32K Aug 18
Williams John Edward EVP & GM, PSD M 947 Aug 18
2025-08-04
1 other
Insider Title Type Shares Price $ Value 10b5-1 Filed
Schreiner James Alan EVP & COO A 1,330 Aug 5
2025-08-01
▼ 1 sell · $28K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Moloney Jacqueline F ▼ Sell 300 $92 $28K Plan Aug 4
2025-07-07
▼ 1 sell · $98K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Schreiner James Alan EVP & COO, MSD ▼ Sell 957 $102 $98K Plan Jul 8
2025-07-03
▼ 1 sell · $210K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Henry David Philip EVP, Operations & Corp Mktg ▼ Sell 2,000 $105 $210K Plan Jul 7
2025-06-02
▼ 1 sell · $25K
Insider Title Type Shares Price $ Value 10b5-1 Filed
Mora Elizabeth ▼ Sell 300 $82 $25K Plan Jun 3
2025-05-12
7 other
⚡ 7 insiders
Insider Title Type Shares Price $ Value 10b5-1 Filed
Batra Raj A 2,479 May 13
CANNONE PETER III A 2,479 May 13
COLELLA GERARD G A 2,479 May 13
Donahue Joseph B A 2,479 May 13
JABRE WISSAM G A 2,479 May 13
Moloney Jacqueline F A 2,479 May 13
Mora Elizabeth A 2,479 May 13