MKS INC (MKSI)

Latest Insider Confidence Score

2026Q1

41.0
Bearish

Company insider confidence (by quarter)

2013Q1 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Carlyle Partners VI Cayman Holdings, L.P. 10% Owner 6,482,732 May 10, 2023
CEP IV Managing GP Holdings, Ltd. 10% Owner 6,482,732 May 10, 2023
CAP IV General Partner, L.P. 10% Owner 6,482,732 May 10, 2023
Carlyle Asia Partners IV, L.P. 10% Owner 6,482,732 May 10, 2023
Gamma Holding Co Ltd 10% Owner 6,482,732 May 10, 2023

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 2, 2026 Mar 3, 2026 Mora Elizabeth Director Sell 46.3 -300 -1.58% ✓ $71.8K
Feb 24, 2026 Feb 25, 2026 Schreiner James Alan COO Sell 17.5 -4,100 -14.91% ✗ $1M
Feb 20, 2026 Feb 24, 2026 COLELLA GERALD G Director Sell 16.3 -20,000 -29.31% ✗ $5.1M
Feb 20, 2026 Feb 23, 2026 CANNONE PETER III Director Sell 20.0 -1,250 -13.00% ✗ $322.6K
Feb 20, 2026 Feb 23, 2026 Taranto Eric Robert EVP & GM, VSD Sell 20.0 -1,452 -6.77% ✗ $359.6K
Feb 20, 2026 Feb 23, 2026 Henry David Philip EVP, Global Str Mktg & GM, MSD Sell 20.0 -2,000 -9.60% ✗ $523.1K
Feb 20, 2026 Feb 23, 2026 McCarthy Michelle M VP & Chief Accounting Officer Sell 20.0 -1,466 -100.00% ✗ $366.5K
Feb 20, 2026 Feb 23, 2026 Moloney Jacqueline F Director Sell 22.5 -829 -7.17% ✗ $205.2K
Feb 20, 2026 Feb 23, 2026 Williams John Edward EVP & GM, PSD Sell 20.0 -2,042 -35.94% ✗ $523.7K
Feb 20, 2026 Feb 23, 2026 Burke Kathleen Flaherty EVP, GC & Secretary Sell 17.5 -4,254 -7.33% ✗ $1.1M
Feb 20, 2026 Feb 23, 2026 Lee John Tseng-Chung CEO Sell 16.3 -30,000 -16.24% ✗ $7.7M
Feb 17, 2026 Feb 18, 2026 Taranto Eric Robert EVP & GM, VSD Sell 40.0 -2,711 -11.22% ✗ $707.1K
Feb 17, 2026 Feb 18, 2026 Henry David Philip EVP, Global Str Mktg & GM, MSD Sell 37.5 -4,097 -16.43% ✗ $1.1M
Feb 17, 2026 Feb 18, 2026 Schreiner James Alan COO Sell 37.5 -4,343 -13.64% ✗ $1.1M
Feb 17, 2026 Feb 18, 2026 Williams John Edward EVP & GM, PSD Sell 40.0 -1,195 -17.38% ✗ $311.7K
Feb 17, 2026 Feb 18, 2026 Mayampurath Ramakumar CFO Sell 40.0 -2,515 -22.21% ✗ $656K
Feb 17, 2026 Feb 18, 2026 Burke Kathleen Flaherty EVP, GC & Secretary Sell 37.5 -5,317 -8.39% ✗ $1.4M
Feb 17, 2026 Feb 18, 2026 Lee John Tseng-Chung CEO Sell 36.3 -32,548 -14.98% ✗ $8.5M
Feb 8, 2026 Feb 9, 2026 Taranto Eric Robert EVP & GM, VSD Neutral 52.5 - 0.00% ✗ -
Feb 8, 2026 Feb 9, 2026 Henry David Philip EVP, Global Str Mktg & GM, MSD Neutral 52.5 - 0.00% ✗ -
Feb 8, 2026 Feb 9, 2026 Schreiner James Alan COO Neutral 52.5 - 0.00% ✗ -
Feb 8, 2026 Feb 9, 2026 Williams John Edward EVP & GM, PSD Neutral 52.5 - 0.00% ✗ -
Feb 8, 2026 Feb 9, 2026 Burke Kathleen Flaherty EVP, GC & Secretary Neutral 52.5 - 0.00% ✗ -
Feb 8, 2026 Feb 9, 2026 Mayampurath Ramakumar CFO Neutral 52.5 - 0.00% ✗ -
Feb 8, 2026 Feb 9, 2026 Lee John Tseng-Chung CEO Neutral 52.5 - 0.00% ✗ -
Dec 2, 2025 Dec 3, 2025 Mora Elizabeth Director Sell 48.8 -300 -1.56% ✓ $47.6K
Nov 17, 2025 Nov 18, 2025 Mayampurath Ramakumar CFO Sell 40.0 -2,628 -31.68% ✗ $375.1K
Oct 31, 2025 Nov 4, 2025 Burke Kathleen Flaherty EVP, GC & Secretary Sell 22.5 -777 -1.50% ✗ $111.7K
Oct 31, 2025 Nov 4, 2025 Lee John Tseng-Chung CEO Sell 20.0 -2,003 -1.34% ✗ $287.9K
Oct 22, 2025 Oct 23, 2025 Schreiner James Alan COO Sell 37.5 -711 -3.06% ✓ $98.6K
Oct 1, 2025 Oct 2, 2025 Moloney Jacqueline F Director Sell 45.0 -300 -2.53% ✓ $36.6K
Sep 18, 2025 Sep 19, 2025 Schreiner James Alan COO Sell 37.5 -838 -3.48% ✓ $103.9K
Sep 18, 2025 Sep 19, 2025 Henry David Philip EVP, Global Str Mktg & GM, MSD Sell 12.5 -5,000 -24.31% ✓ $650K
Sep 2, 2025 Sep 3, 2025 Mora Elizabeth Director Sell 48.8 -300 -1.53% ✓ $30K
Aug 18, 2025 Aug 19, 2025 Schreiner James Alan COO Sell 42.5 -1,249 -4.93% ✗ $125.2K
Aug 15, 2025 Aug 18, 2025 Williams John Edward EVP & GM, PSD Sell 46.3 -308 -7.80% ✗ $32.3K
Aug 4, 2025 Aug 5, 2025 Schreiner James Alan COO Neutral 52.5 - 0.00% ✗ -
Aug 1, 2025 Aug 4, 2025 Moloney Jacqueline F Director Sell 45.0 -300 -2.47% ✓ $27.6K
Jul 7, 2025 Jul 8, 2025 Schreiner James Alan COO Sell 37.5 -957 -4.05% ✓ $98K
Jul 3, 2025 Jul 7, 2025 Henry David Philip EVP, Operations & Corp Mktg Sell 28.8 -2,000 -8.86% ✓ $210K
Jun 2, 2025 Jun 3, 2025 Mora Elizabeth Director Sell 48.8 -300 -1.51% ✓ $24.5K
May 12, 2025 May 13, 2025 Mora Elizabeth Director Neutral 90.0 +2,479 14.26% ✗ -
May 12, 2025 May 13, 2025 Moloney Jacqueline F Director Neutral 90.0 +2,479 25.61% ✗ -
May 12, 2025 May 13, 2025 JABRE WISSAM G Director Neutral 90.0 +2,479 123.43% ✗ -
May 12, 2025 May 13, 2025 Donahue Joseph B Director Neutral 90.0 +2,479 27.95% ✗ -
May 12, 2025 May 13, 2025 CANNONE PETER III Director Neutral 90.0 +2,479 34.76% ✗ -
May 12, 2025 May 13, 2025 Batra Raj Director Neutral 90.0 +2,479 19.12% ✗ -
May 12, 2025 May 13, 2025 COLELLA GERARD G Director Neutral 82.5 +2,479 3.77% ✗ -
Apr 17, 2025 Apr 18, 2025 Williams John Edward EVP & GM, PSD Sell 46.3 -565 -15.84% ✗ $36K
Apr 15, 2025 Apr 17, 2025 McCarthy Michelle M VP & Chief Accounting Officer Sell 46.3 -608 -29.32% ✗ $41.6K
Mar 3, 2025 Mar 4, 2025 Mora Elizabeth Director Sell 48.8 -275 -1.56% ✓ $25.4K
Mar 3, 2025 Mar 4, 2025 Moloney Jacqueline F Director Sell 41.3 -300 -3.01% ✓ $27.7K
Feb 18, 2025 Feb 19, 2025 Williams John Edward EVP & GM, PSD Sell 42.5 -901 -33.04% ✗ $93.4K
Feb 18, 2025 Feb 19, 2025 Taranto Eric Robert EVP & GM, VSD Sell 42.5 -1,760 -9.15% ✗ $182.5K
Feb 18, 2025 Feb 19, 2025 Schreiner James Alan COO Sell 40.0 -3,648 -13.44% ✗ $378.2K
Feb 18, 2025 Feb 19, 2025 Mayampurath Ramakumar CFO Neutral 52.5 - 0.00% ✗ -
Feb 18, 2025 Feb 19, 2025 Henry David Philip EVP, Operations & Corp Mktg Sell 42.5 -2,372 -9.57% ✗ $245.9K
Feb 18, 2025 Feb 19, 2025 Burke Kathleen Flaherty EVP, GC & Secretary Sell 40.0 -3,970 -7.23% ✗ $411.6K
Feb 18, 2025 Feb 19, 2025 Lee John Tseng-Chung CEO Sell 37.5 -27,332 -15.67% ✗ $2.8M
Feb 18, 2025 Feb 19, 2025 COLELLA GERARD G Director Sell 20.0 -8,000 -10.85% ✗ $836.2K
Feb 10, 2025 Feb 11, 2025 Williams John Edward EVP & GM, PSD Neutral 52.5 - 0.00% ✗ -
Feb 10, 2025 Feb 11, 2025 Taranto Eric Robert EVP & GM, VSD Neutral 52.5 - 0.00% ✗ -
Feb 10, 2025 Feb 11, 2025 Schreiner James Alan COO Neutral 52.5 - 0.00% ✗ -
Feb 10, 2025 Feb 11, 2025 Henry David Philip EVP, Operations & Corp Mktg Neutral 52.5 - 0.00% ✗ -
Feb 10, 2025 Feb 11, 2025 Burke Kathleen Flaherty EVP, GC & Secretary Neutral 52.5 - 0.00% ✗ -
Feb 10, 2025 Feb 11, 2025 Lee John Tseng-Chung CEO Neutral 52.5 - 0.00% ✗ -
Dec 10, 2024 Dec 11, 2024 Moloney Jacqueline F Director Sell 45.0 -300 -2.92% ✓ $34.4K
Dec 6, 2024 Dec 10, 2024 Lee John Tseng-Chung CEO Sell 20.0 -2,994 -2.59% ✗ $343.1K
Dec 2, 2024 Dec 3, 2024 Mora Elizabeth Director Sell 48.8 -275 -1.53% ✓ $31.2K
Nov 15, 2024 Nov 18, 2024 Mayampurath Ramakumar CFO Neutral 52.5 - 0.00% ✗ -
Nov 4, 2024 Nov 5, 2024 JABRE WISSAM G Director Neutral 90.0 +2,008 100.00% ✗ -
Nov 5, 2024 JABRE WISSAM G Director Neutral 52.5 - 0.00% ✗ -
Oct 16, 2024 Mayampurath Ramakumar CFO Neutral 52.5 - 0.00% ✗ -
Oct 1, 2024 Oct 2, 2024 Moloney Jacqueline F Director Sell 45.0 -250 -2.37% ✓ $27.2K
Sep 3, 2024 Sep 4, 2024 Mora Elizabeth Director Sell 48.8 -275 -1.51% ✓ $31.9K
Aug 19, 2024 Aug 20, 2024 Schreiner James Alan COO Sell 42.5 -1,873 -9.10% ✗ $223.1K
Aug 16, 2024 Aug 19, 2024 Williams John Edward EVP & GM, PSD Sell 22.5 -1,800 -99.28% ✗ $213.7K
Aug 15, 2024 Aug 19, 2024 McCarthy Michelle M VP & Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Aug 15, 2024 Aug 16, 2024 Williams John Edward EVP & GM, PSD Sell 26.3 -307 -14.48% ✗ $35K
Aug 1, 2024 Aug 2, 2024 Moloney Jacqueline F Director Sell 45.0 -250 -2.32% ✓ $30.9K
Jun 3, 2024 Jun 4, 2024 Mora Elizabeth Director Sell 48.8 -275 -1.49% ✓ $35.6K
May 15, 2024 May 16, 2024 Williams John Edward EVP & GM, PSD Neutral 52.5 - 0.00% ✗ -
May 15, 2024 May 16, 2024 Schreiner James Alan COO Neutral 52.5 - 0.00% ✗ -
May 15, 2024 Williams John Edward EVP & GM, PSD Neutral 52.5 - 0.00% ✗ -
May 7, 2024 May 8, 2024 Warner Michelle M Director Neutral 90.0 +1,621 17.57% ✗ -
May 7, 2024 May 8, 2024 Moloney Jacqueline F Director Neutral 90.0 +1,621 17.70% ✗ -
May 7, 2024 May 8, 2024 Mora Elizabeth Director Neutral 85.0 +1,621 9.62% ✗ -
May 7, 2024 May 8, 2024 Donahue Joseph B Director Neutral 90.0 +1,621 22.37% ✗ -
May 7, 2024 May 8, 2024 CANNONE PETER III Director Neutral 90.0 +1,621 29.43% ✗ -
May 7, 2024 May 8, 2024 Batra Raj Director Neutral 90.0 +1,621 14.30% ✗ -
May 7, 2024 May 8, 2024 COLELLA GERARD G Director Neutral 77.5 +1,621 2.25% ✗ -
Apr 15, 2024 Apr 16, 2024 McCarthy Michelle M VP & Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Apr 1, 2024 Apr 2, 2024 Mora Elizabeth Director Sell 48.8 -250 -1.46% ✓ $33.3K
Mar 7, 2024 McCarthy Michelle M VP & Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Mar 1, 2024 Mar 4, 2024 Moloney Jacqueline F Director Sell 45.0 -250 -2.66% ✓ $30.7K
Mar 1, 2024 Mar 4, 2024 Burke Kathleen Flaherty EVP, GC & Secretary Sell 20.0 -7,411 -14.70% ✗ $910.7K
Feb 22, 2024 Feb 26, 2024 BAGSHAW SETH H CFO Sell 17.5 -32,865 -70.71% ✗ $4.1M
Feb 16, 2024 Feb 20, 2024 Moloney Jacqueline F Director Sell 22.5 -1,917 -16.92% ✗ $237.9K
Feb 15, 2024 Feb 16, 2024 Taranto Eric Robert EVP & GM, VSD Sell 42.5 -1,694 -11.49% ✗ $206.9K
Feb 15, 2024 Feb 16, 2024 Schreiner James Alan COO Sell 40.0 -3,756 -18.57% ✗ $458.8K