Insider Transactions last 24 months for MKS Inc. - NSDQ: MKSI
Transactions
All
Buy
Sell
Option Exercise
Filer's Name
Relationship/
Trans.
Trans. Type
Ownership Type
Security Type
Shares
Price
Trans.
Total Shares Owned
Moloney Jacqueline F Director 03/12/2026 DS Direct COM 340 $213.77 $72,705.25 10,393 Taranto Eric Robert EVP & GM, VSD 03/06/2026 DS Direct COM 4,568 $220.52 $1,007,317.81 15,445 Mora Elizabeth Director 03/02/2026 DS Direct COM 300 $239.44 $71,832.00 18,663 Colella Gerald G Director 02/24/2026 DS Indirect COM 10,000 $253.97 $2,539,675.00 40,017 Schreiner James Alan EVP & COO 02/24/2026 DS Direct COM 4,100 $255.00 $1,045,500.00 23,402 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 1,890 $259.70 $490,839.05 154,696 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 1,988 $257.81 $512,523.10 156,586 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 12,812 $256.93 $3,291,803.82 158,574 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 13,310 $256.05 $3,408,076.08 171,386 Burke Kathleen Flaherty EVP, GC & Secretary 02/20/2026 DS Direct COM 4,254 $250.00 $1,063,500.00 53,794 Williams John Edward EVP & GM, PSD 02/20/2026 DS Direct COM 2,043 $256.41 $523,744.37 3,640 Moloney Jacqueline F Director 02/20/2026 DS Direct COM 829 $247.55 $205,218.95 10,733 Mccarthy Michelle M VP & Chief Accounting Officer 02/20/2026 DS Direct COM 816 $250.35 $204,283.89 0 Mccarthy Michelle M VP & Chief Accounting Officer 02/20/2026 DS Direct COM 650 $249.57 $162,218.81 816 Henry David Philip EVP, Global Str Mktg & GM, MSD 02/20/2026 DS Direct COM 2,000 $261.56 $523,120.20 18,841 Taranto Eric Robert EVP & GM, VSD 02/20/2026 DS Direct COM 1,453 $247.55 $359,623.31 20,013 Cannone Peter Iii Director 02/20/2026 DS Direct COM 1,250 $258.06 $322,574.50 8,362 Colella Gerald G Director 02/20/2026 DS Indirect COM 10,000 $252.90 $2,528,999.00 50,017 Lee John Tseng-Chung President & CEO 02/17/2026 DF Direct COM 32,548 $260.74 $8,486,645.57 184,696 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 12,091 $0.00 $0.00 217,244 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 16,989 $0.00 $0.00 205,153 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 7,208 $0.00 $0.00 188,164 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 3,859 $0.00 $0.00 180,956 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 7,654 $0.00 $0.00 177,097 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 22,088 $0.00 $0.00 169,443
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Filer's Name
Relationship/
Trans.
Trans. Type
Ownership Type
Security Type
Shares
Price
Trans.
Total Shares Owned
Colella Gerard G Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 8,217 Batra Raj Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 15,445 Cannone Peter Iii Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 9,612 Donahue Joseph B Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 11,351 Jabre Wissam G Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 4,488 Moloney Jacqueline F Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 12,162 Mora Elizabeth Director 05/12/2025 AA Direct COM 2,479 $0.00 $0.00 19,863 Jabre Wissam G Director 11/04/2024 AA Direct COM 2,009 $0.00 $0.00 2,009 Colella Gerard G Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 5,738 Batra Raj Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 12,966 Cannone Peter Iii Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 7,133 Donahue Joseph B Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 8,871 Mora Elizabeth Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 18,484 Moloney Jacqueline F Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 10,783 Warner Michelle M Director 05/07/2024 AA Direct COM 1,622 $0.00 $0.00 10,852
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Filer's Name
Relationship/
Trans.
Trans. Type
Ownership Type
Security Type
Shares
Price
Trans.
Total Shares Owned
Moloney Jacqueline F Director 03/12/2026 DS Direct COM 340 $213.77 $72,705.25 10,393 Taranto Eric Robert EVP & GM, VSD 03/06/2026 DS Direct COM 4,568 $220.52 $1,007,317.81 15,445 Mora Elizabeth Director 03/02/2026 DS Direct COM 300 $239.44 $71,832.00 18,663 Colella Gerald G Director 02/24/2026 DS Indirect COM 10,000 $253.97 $2,539,675.00 40,017 Schreiner James Alan EVP & COO 02/24/2026 DS Direct COM 4,100 $255.00 $1,045,500.00 23,402 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 1,890 $259.70 $490,839.05 154,696 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 1,988 $257.81 $512,523.10 156,586 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 12,812 $256.93 $3,291,803.82 158,574 Lee John Tseng-Chung President & CEO 02/20/2026 DS Direct COM 13,310 $256.05 $3,408,076.08 171,386 Burke Kathleen Flaherty EVP, GC & Secretary 02/20/2026 DS Direct COM 4,254 $250.00 $1,063,500.00 53,794 Williams John Edward EVP & GM, PSD 02/20/2026 DS Direct COM 2,043 $256.41 $523,744.37 3,640 Moloney Jacqueline F Director 02/20/2026 DS Direct COM 829 $247.55 $205,218.95 10,733 Mccarthy Michelle M VP & Chief Accounting Officer 02/20/2026 DS Direct COM 816 $250.35 $204,283.89 0 Mccarthy Michelle M VP & Chief Accounting Officer 02/20/2026 DS Direct COM 650 $249.57 $162,218.81 816 Henry David Philip EVP, Global Str Mktg & GM, MSD 02/20/2026 DS Direct COM 2,000 $261.56 $523,120.20 18,841 Taranto Eric Robert EVP & GM, VSD 02/20/2026 DS Direct COM 1,453 $247.55 $359,623.31 20,013 Cannone Peter Iii Director 02/20/2026 DS Direct COM 1,250 $258.06 $322,574.50 8,362 Colella Gerald G Director 02/20/2026 DS Indirect COM 10,000 $252.90 $2,528,999.00 50,017 Lee John Tseng-Chung President & CEO 02/17/2026 DF Direct COM 32,548 $260.74 $8,486,645.57 184,696 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 DF Direct COM 5,318 $260.74 $1,386,562.65 58,048 Mayampurath Ramakumar EVP & CFO 02/17/2026 DF Direct COM 2,516 $260.74 $656,006.46 8,811 Williams John Edward EVP & GM, PSD 02/17/2026 DF Direct COM 1,195 $260.74 $311,710.76 5,683 Schreiner James Alan EVP & COO 02/17/2026 DF Direct COM 4,344 $260.74 $1,132,593.03 27,502 Henry David Philip EVP, Global Str Mktg & GM, MSD 02/17/2026 DF Direct COM 4,097 $260.74 $1,068,321.92 20,841 Taranto Eric Robert EVP & GM, VSD 02/17/2026 DF Direct COM 2,712 $260.74 $707,066.39 21,465
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Filer's Name
Relationship/
Trans.
Trans. Type
Ownership Type
Security Type
Shares
Price
Trans.
Total Shares Owned
Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 12,091 $0.00 $0.00 217,244 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 16,989 $0.00 $0.00 205,153 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 7,208 $0.00 $0.00 188,164 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 3,859 $0.00 $0.00 180,956 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 7,654 $0.00 $0.00 177,097 Lee John Tseng-Chung President & CEO 02/17/2026 AM Direct COM 22,088 $0.00 $0.00 169,443 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 AM Direct COM 2,493 $0.00 $0.00 63,366 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 AM Direct COM 2,336 $0.00 $0.00 60,873 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 AM Direct COM 1,576 $0.00 $0.00 58,537 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 AM Direct COM 563 $0.00 $0.00 56,961 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 AM Direct COM 1,788 $0.00 $0.00 56,399 Burke Kathleen Flaherty EVP, GC & Secretary 02/17/2026 AM Direct COM 3,451 $0.00 $0.00 54,611 Mayampurath Ramakumar EVP & CFO 02/17/2026 AM Direct COM 2,702 $0.00 $0.00 11,327 Mayampurath Ramakumar EVP & CFO 02/17/2026 AM Direct COM 2,958 $0.00 $0.00 8,625 Williams John Edward EVP & GM, PSD 02/17/2026 AM Direct COM 1,106 $0.00 $0.00 6,878 Williams John Edward EVP & GM, PSD 02/17/2026 AM Direct COM 991 $0.00 $0.00 5,772 Williams John Edward EVP & GM, PSD 02/17/2026 AM Direct COM 841 $0.00 $0.00 4,781 Williams John Edward EVP & GM, PSD 02/17/2026 AM Direct COM 300 $0.00 $0.00 3,940 Schreiner James Alan EVP & COO 02/17/2026 AM Direct COM 1,944 $0.00 $0.00 31,846 Schreiner James Alan EVP & COO 02/17/2026 AM Direct COM 1,741 $0.00 $0.00 29,902 Schreiner James Alan EVP & COO 02/17/2026 AM Direct COM 1,211 $0.00 $0.00 28,161 Schreiner James Alan EVP & COO 02/17/2026 AM Direct COM 432 $0.00 $0.00 26,950 Schreiner James Alan EVP & COO 02/17/2026 AM Direct COM 1,330 $0.00 $0.00 26,517 Schreiner James Alan EVP & COO 02/17/2026 AM Direct COM 2,567 $0.00 $0.00 25,187 Henry David Philip EVP, Global Str Mktg & GM, MSD 02/17/2026 AM Direct COM 2,054 $0.00 $0.00 24,939
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Transaction Type Key A = Acquired, D = Disposed A = Grant, award or other acquisition pursuant to Rule 16b-3(d)
C = Conversion of derivative security |
D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) |
E = Expiration of short derivative position |
F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. |
G = Gift |
H = Expiration (or cancellation) of long derivative position with value received |
I = Discretionary transaction in accordance with Rule 16b-3(f) |
J = Other |
L = Small acquisition under Rule 16a-6 |
M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 |
O = Exercise of out-of-the-money derivative security |
P = Open market or private purchase |
S = Open market or private sale |
U = Disposition pursuant to a tender of shares in a change of control transaction |
W = Acquisition or disposition by will or the laws of descent and distribution |
X = Exercise of in-the-money or at-the-money derivative security |
Z = Deposit into or withdrawal from voting trust
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