There have been 50 recent insider transactions recorded for MKS Inc. (MKSI), including 18 buys and 32 sells. Total insider buying was valued at RSU Award and total insider selling at $11.97M.
Notable insiders with recent activity include Moloney Jacqueline F, Taranto Eric Robert, Mora Elizabeth. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — MKSI
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-12 |
Moloney Jacqueline F |
Director |
Informative Sell |
340 |
$213.77 |
$72.68K |
10,393 |
| 2026-03-06 |
Taranto Eric Robert |
EVP & GM, Vsd |
Informative Sell |
4,568 |
$220.52 |
$1.01M |
15,445 |
| 2026-03-02 |
Mora Elizabeth |
Director |
Informative Sell |
300 |
$239.44 |
$71.83K |
18,663 |
| 2026-02-24 |
Colella Gerald G |
Director |
Informative Sell |
10,000 |
$253.97 |
$2.54M |
40,017 |
| 2026-02-24 |
Schreiner James Alan |
EVP & COO |
Informative Sell |
4,100 |
$255.00 |
$1.05M |
23,402 |
| 2026-02-20 |
Cannone Peter Iii |
Director |
Informative Sell |
1,250 |
$258.06 |
$322.58K |
8,362 |
| 2026-02-20 |
Lee John Tseng-chung |
President & CEO |
Informative Sell |
1,890 |
$259.70 |
$490.84K |
154,696 |
| 2026-02-20 |
Moloney Jacqueline F |
Director |
Informative Sell |
829 |
$247.55 |
$205.22K |
10,733 |
| 2026-02-20 |
Williams John Edward |
EVP & GM, Psd |
Informative Sell |
2,043 |
$256.41 |
$523.84K |
3,640 |
| 2026-02-20 |
Mccarthy Michelle M |
VP & Chief Accounting Officer |
Informative Sell |
816 |
$250.35 |
$204.28K |
- |
| 2026-02-20 |
Burke Kathleen Flaherty |
EVP, Gc & Secretary |
Informative Sell |
4,254 |
$250.00 |
$1.06M |
53,794 |
| 2026-02-20 |
Taranto Eric Robert |
EVP & GM, Vsd |
Informative Sell |
1,453 |
$247.55 |
$359.69K |
20,013 |
| 2026-02-20 |
Henry David Philip |
EVP, Global Str Mktg & GM, Msd |
Informative Sell |
2,000 |
$261.56 |
$523.12K |
18,841 |
| 2026-02-20 |
Colella Gerald G |
Director |
Informative Sell |
10,000 |
$252.90 |
$2.53M |
50,017 |
| 2026-02-17 |
Lee John Tseng-chung |
President & CEO |
Option Exercise (Sell) |
7,654 |
- |
- |
124,976 |
| 2026-02-17 |
Williams John Edward |
EVP & GM, Psd |
Option Exercise |
300 |
- |
- |
3,940 |
| 2026-02-17 |
Burke Kathleen Flaherty |
EVP, Gc & Secretary |
Option Exercise (Sell) |
2,493 |
- |
- |
15,129 |
| 2026-02-17 |
Schreiner James Alan |
EVP & COO |
Option Exercise (Sell) |
1,944 |
- |
- |
11,396 |
| 2026-02-17 |
Taranto Eric Robert |
EVP & GM, Vsd |
Option Exercise (Sell) |
1,303 |
- |
- |
8,029 |
| 2026-02-17 |
Henry David Philip |
EVP, Global Str Mktg & GM, Msd |
Option Exercise (Sell) |
2,054 |
- |
- |
12,093 |
| 2026-02-17 |
Mayampurath Ramakumar |
EVP & CFO |
Option Exercise |
2,958 |
- |
- |
8,625 |
| 2025-06-02 |
Mora Elizabeth |
Director |
Informative Sell |
300 |
$81.78 |
$24.53K |
19,563 |
| 2025-05-12 |
Colella Gerard G |
Director |
RSU Award |
2,479 |
- |
- |
8,217 |
| 2025-05-12 |
Cannone Peter Iii |
Director |
RSU Award |
2,479 |
- |
- |
9,612 |
| 2025-05-12 |
Donahue Joseph B |
Director |
RSU Award |
2,479 |
- |
- |
11,351 |
| 2025-05-12 |
Moloney Jacqueline F |
Director |
RSU Award |
2,479 |
- |
- |
12,162 |
| 2025-05-12 |
Mora Elizabeth |
Director |
RSU Award |
2,479 |
- |
- |
19,863 |
| 2025-05-12 |
Batra Raj |
Director |
RSU Award |
2,479 |
- |
- |
15,445 |
| 2025-05-12 |
Jabre Wissam G |
Director |
RSU Award |
2,479 |
- |
- |
4,488 |
| 2025-04-17 |
Williams John Edward |
EVP & GM, Psd |
Tax Withholding of RSU |
565 |
$63.69 |
$35.98K |
3,001 |
| 2025-04-15 |
Mccarthy Michelle M |
VP & Chief Accounting Officer |
Option Exercise |
968 |
- |
- |
968 |
| 2025-03-03 |
Moloney Jacqueline F |
Director |
Informative Sell |
300 |
$92.46 |
$27.74K |
9,683 |
| 2025-03-03 |
Mora Elizabeth |
Director |
Informative Sell |
275 |
$92.46 |
$25.43K |
17,384 |
| 2025-02-18 |
Colella Gerard G |
Director |
Informative Sell |
8,000 |
$104.53 |
$836.22K |
60,017 |
| 2025-02-18 |
Lee John Tseng-chung |
President & CEO |
Option Exercise (Sell) |
7,207 |
- |
- |
90,156 |
| 2025-02-18 |
Williams John Edward |
EVP & GM, Psd |
Option Exercise |
915 |
- |
- |
928 |
| 2025-02-18 |
Burke Kathleen Flaherty |
EVP, Gc & Secretary |
Option Exercise (Sell) |
1,648 |
- |
- |
17,776 |
| 2025-02-18 |
Schreiner James Alan |
EVP & COO, Msd |
Option Exercise (Sell) |
1,211 |
- |
- |
14,329 |
| 2025-02-18 |
Taranto Eric Robert |
EVP & GM, Vsd |
Option Exercise (Sell) |
975 |
- |
- |
9,238 |
| 2025-02-18 |
Henry David Philip |
EVP, Operations & Corp Mktg |
Option Exercise (Sell) |
1,278 |
- |
- |
13,286 |
| 2025-02-18 |
Mayampurath Ramakumar |
EVP, CFO & Treasurer |
RSU Award |
8,107 |
- |
- |
24,697 |
| 2025-02-10 |
Lee John Tseng-chung |
President & CEO |
RSU Award |
12,107 |
- |
- |
113,991 |
| 2025-02-10 |
Williams John Edward |
EVP & GM, Psd |
RSU Award |
901 |
- |
- |
9,426 |
| 2025-02-10 |
Burke Kathleen Flaherty |
EVP, Gc & Secretary |
RSU Award |
1,766 |
- |
- |
21,599 |
| 2025-02-10 |
Schreiner James Alan |
EVP & COO, Msd |
RSU Award |
1,297 |
- |
- |
18,167 |
| 2025-02-10 |
Taranto Eric Robert |
EVP & GM, Vsd |
RSU Award |
1,045 |
- |
- |
11,251 |
| 2025-02-10 |
Henry David Philip |
EVP, Operations & Corp Mktg |
RSU Award |
1,369 |
- |
- |
15,137 |
| 2024-12-10 |
Moloney Jacqueline F |
Director |
Informative Sell |
300 |
$114.80 |
$34.44K |
9,983 |
| 2024-12-06 |
Lee John Tseng-chung |
President & CEO |
Option Exercise (Sell) |
984 |
- |
- |
101,884 |
| 2024-12-02 |
Mora Elizabeth |
Director |
Informative Sell |
275 |
$113.41 |
$31.19K |
17,659 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
