Lee John Tseng-chung
President & CEO
Exercise
Reported value range
Not reported
678.58 shares
Traded
Oct 30, 2026
Filed
Nov 3, 2026
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MKS Inc
MKSI
ManufacturingInstruments
Transactions reported in official disclosures
Price with disclosed trades
Daily closes, past year · marks sit on transaction dates, sized by value
20 trades
| Reporting person | Filed | Transaction | Transaction value | Source | Actions |
|---|---|---|---|---|---|
| Lee John Tseng-chung President & CEO | Nov 3, 2026 4-day lag | Exercise Oct 30, 2026 | Not reported Reported range | SEC Form 4 View filing | |
| Lee John Tseng-chung President & CEO | Nov 3, 2026 4-day lag | Exercise Oct 30, 2026 | Not reported Reported range | SEC Form 4 View filing | |
| Lee John Tseng-chung President & CEO | Nov 3, 2026 4-day lag | Disposition Oct 30, 2026 | $435.89K Filed shares x price | SEC Form 4 View filing | |
| Lee John Tseng-chung President & CEO | Nov 3, 2026 4-day lag | Exercise Oct 30, 2026 | Not reported Reported range | SEC Form 4 View filing | |
| Lee John Tseng-chung President & CEO | Nov 3, 2026 4-day lag | Exercise Oct 30, 2026 | Not reported Reported range | SEC Form 4 View filing | |
| Mora Elizabeth Director | Sep 2, 2026 1-day lag | Sale Sep 1, 2026 | $75.29K Filed shares x price | SEC Form 4 View filing | |
| Donlan Renee Martel EVP, GC & Cco | Aug 18, 2026 1-day lag | Award Aug 17, 2026 | Not reported Reported range | SEC Form 4 View filing | |
| Lee John Tseng-chung President & CEO | Aug 17, 2026 3-day lag | Sale Aug 14, 2026 | $3.02M Filed shares x price | SEC Form 4 View filing | |
| Williams John Edward EVP & Gm, Psd | Aug 4, 2026 1-day lag | Sale Aug 3, 2026 | $131.76K Filed shares x price | SEC Form 4 View filing | |
| Schreiner James Alan EVP & COO | Jun 16, 2026 4-day lag | Sale Jun 12, 2026 | $75.3K Filed shares x price | SEC Form 4 View filing | |
| Schreiner James Alan EVP & COO | Jun 16, 2026 4-day lag | Sale Jun 12, 2026 | $853.79K Filed shares x price | SEC Form 4 View filing | |
| Schreiner James Alan EVP & COO | Jun 16, 2026 4-day lag | Sale Jun 12, 2026 | $281.28K Filed shares x price | SEC Form 4 View filing | |
| Schreiner James Alan EVP & COO | Jun 11, 2026 1-day lag | Sale Jun 10, 2026 | $247.91K Filed shares x price | SEC Form 4 View filing | |
| Mccarthy Michelle M SVP & Chief Accounting Officer | Jun 8, 2026 3-day lag | Sale Jun 5, 2026 | $767.27K Filed shares x price | SEC Form 4 View filing | |
| Mora Elizabeth Director | Jun 2, 2026 1-day lag | Sale Jun 1, 2026 | $95.41K Filed shares x price | SEC Form 4 View filing | |
| Henry David Philip EVP, Global Str Mktg & Gm, Msd | Jun 2, 2026 1-day lag | Sale Jun 1, 2026 | $1.89M Filed shares x price | SEC Form 4 View filing | |
| Hon. Lisa Mc Clain U.S. House member | Nov 21, 2025 21-day lag | Sale Oct 31, 2025 | $1K - $15K Reported range | House PTR View filing | |
| Hon. Lisa Mc Clain U.S. House member | Nov 21, 2025 22-day lag | Buy Oct 30, 2025 | $1K - $15K Reported range | House PTR View filing | |
| Hon. Lisa Mc Clain U.S. House member | Nov 21, 2025 22-day lag | Sale Oct 30, 2025 | $1K - $15K Reported range | House PTR View filing | |
| Hon. Lisa Mc Clain U.S. House member | Sep 12, 2025 39-day lag | Buy Aug 4, 2025 | $1K - $15K Reported range | House PTR View filing |
Lee John Tseng-chung
President & CEO
Exercise
Reported value range
Not reported
1478.86 shares
Traded
Oct 30, 2026
Filed
Nov 3, 2026
Lee John Tseng-chung
President & CEO
Disposition
Calculated transaction value
$435.89K
2157.45 shares @ $202.04
Traded
Oct 30, 2026
Filed
Nov 3, 2026
Lee John Tseng-chung
President & CEO
Exercise
Reported value range
Not reported
1478.86 shares
Traded
Oct 30, 2026
Filed
Nov 3, 2026
Lee John Tseng-chung
President & CEO
Exercise
Reported value range
Not reported
678.58 shares
Traded
Oct 30, 2026
Filed
Nov 3, 2026
Mora Elizabeth
Director
Sale
Calculated transaction value
$75.29K
300 shares @ $250.96
Traded
Sep 1, 2026
Filed
Sep 2, 2026
Donlan Renee Martel
EVP, GC & Cco
Award
Reported value range
Not reported
954.04 shares
Traded
Aug 17, 2026
Filed
Aug 18, 2026
Lee John Tseng-chung
President & CEO
Sale
Calculated transaction value
$3.02M
10,000 shares @ $302.01
Traded
Aug 14, 2026
Filed
Aug 17, 2026
Williams John Edward
EVP & Gm, Psd
Sale
Calculated transaction value
$131.76K
457 shares @ $288.31
Traded
Aug 3, 2026
Filed
Aug 4, 2026
Schreiner James Alan
EVP & COO
Sale
Calculated transaction value
$75.3K
217 shares @ $347
Traded
Jun 12, 2026
Filed
Jun 16, 2026
Schreiner James Alan
EVP & COO
Sale
Calculated transaction value
$853.79K
2,471 shares @ $345.52
Traded
Jun 12, 2026
Filed
Jun 16, 2026
Schreiner James Alan
EVP & COO
Sale
Calculated transaction value
$281.28K
812 shares @ $346.41
Traded
Jun 12, 2026
Filed
Jun 16, 2026
Schreiner James Alan
EVP & COO
Sale
Calculated transaction value
$247.91K
781 shares @ $317.42
Traded
Jun 10, 2026
Filed
Jun 11, 2026
Mccarthy Michelle M
SVP & Chief Accounting Officer
Sale
Calculated transaction value
$767.27K
2,434 shares @ $315.23
Traded
Jun 5, 2026
Filed
Jun 8, 2026
Mora Elizabeth
Director
Sale
Calculated transaction value
$95.41K
300 shares @ $318.02
Traded
Jun 1, 2026
Filed
Jun 2, 2026
Henry David Philip
EVP, Global Str Mktg & Gm, Msd
Sale
Calculated transaction value
$1.89M
6,000 shares @ $314.43
Traded
Jun 1, 2026
Filed
Jun 2, 2026
Hon. Lisa Mc Clain
U.S. House member
Sale
Reported value range
$1K - $15K
Not reported
Traded
Oct 31, 2025
Filed
Nov 21, 2025
Hon. Lisa Mc Clain
U.S. House member
Buy
Reported value range
$1K - $15K
Not reported
Traded
Oct 30, 2025
Filed
Nov 21, 2025
Hon. Lisa Mc Clain
U.S. House member
Sale
Reported value range
$1K - $15K
Not reported
Traded
Oct 30, 2025
Filed
Nov 21, 2025
Hon. Lisa Mc Clain
U.S. House member
Buy
Reported value range
$1K - $15K
Not reported
Traded
Aug 4, 2025
Filed
Sep 12, 2025