Stocks · Technology · Industrial Instruments For Measurement, Display, and Control

MKS INC

MKSI Clue Score40
United States Fiscal year ends December CIK 0001049502
264.50
+1.58%
Close, 9 Oct 2026 · USD

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
264.50 on 9 Oct 2026
445 289 133 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $133.03 14 Oct 2025 $132.68 15 Oct 2025 $136.42 16 Oct 2025 $137.75 17 Oct 2025 $136.52 20 Oct 2025 $141.58 21 Oct 2025 $140.73 22 Oct 2025 $134.42 23 Oct 2025 $140.65 24 Oct 2025 $142.94 27 Oct 2025 $145.01 28 Oct 2025 $140.48 29 Oct 2025 $141.40 30 Oct 2025 $139.31 31 Oct 2025 $143.71 3 Nov 2025 $145.47 4 Nov 2025 $137.20 5 Nov 2025 $139.92 6 Nov 2025 $155.25 7 Nov 2025 $154.80 10 Nov 2025 $158.90 11 Nov 2025 $152.63 12 Nov 2025 $153.17 13 Nov 2025 $144.11 14 Nov 2025 $142.74 17 Nov 2025 $141.71 18 Nov 2025 $140.38 19 Nov 2025 $143.86 20 Nov 2025 $138.49 21 Nov 2025 $144.00 24 Nov 2025 $149.95 25 Nov 2025 $149.00 26 Nov 2025 $152.02 28 Nov 2025 $156.39 1 Dec 2025 $155.94 2 Dec 2025 $160.97 3 Dec 2025 $163.40 4 Dec 2025 $163.35 5 Dec 2025 $162.94 8 Dec 2025 $164.40 9 Dec 2025 $165.19 10 Dec 2025 $167.88 11 Dec 2025 $166.80 12 Dec 2025 $155.77 15 Dec 2025 $159.31 16 Dec 2025 $156.25 17 Dec 2025 $148.70 18 Dec 2025 $157.01 19 Dec 2025 $159.56 22 Dec 2025 $161.99 23 Dec 2025 $162.92 24 Dec 2025 $163.40 26 Dec 2025 $164.19 29 Dec 2025 $162.81 30 Dec 2025 $161.82 31 Dec 2025 $159.80 2 Jan 2026 $168.36 5 Jan 2026 $176.19 6 Jan 2026 $183.50 7 Jan 2026 $183.22 8 Jan 2026 $178.98 9 Jan 2026 $186.08 12 Jan 2026 $185.92 13 Jan 2026 $193.28 14 Jan 2026 $190.30 15 Jan 2026 $205.26 16 Jan 2026 $203.99 20 Jan 2026 $210.66 21 Jan 2026 $220.73 22 Jan 2026 $223.00 23 Jan 2026 $217.06 26 Jan 2026 $218.70 27 Jan 2026 $229.60 28 Jan 2026 $236.05 29 Jan 2026 $243.88 30 Jan 2026 $235.41 2 Feb 2026 $233.57 3 Feb 2026 $229.58 4 Feb 2026 $220.00 5 Feb 2026 $226.83 6 Feb 2026 $242.96 9 Feb 2026 $250.60 10 Feb 2026 $252.52 11 Feb 2026 $259.05 12 Feb 2026 $249.42 13 Feb 2026 $260.74 17 Feb 2026 $262.94 18 Feb 2026 $250.36 19 Feb 2026 $249.08 20 Feb 2026 $259.27 23 Feb 2026 $253.71 24 Feb 2026 $251.41 25 Feb 2026 $255.91 26 Feb 2026 $244.68 27 Feb 2026 $244.46 2 Mar 2026 $244.26 3 Mar 2026 $232.56 4 Mar 2026 $235.23 5 Mar 2026 $230.45 6 Mar 2026 $210.00 9 Mar 2026 $218.36 10 Mar 2026 $225.28 11 Mar 2026 $224.27 12 Mar 2026 $213.49 13 Mar 2026 $213.45 16 Mar 2026 $221.96 17 Mar 2026 $228.89 18 Mar 2026 $233.39 19 Mar 2026 $236.85 20 Mar 2026 $227.13 23 Mar 2026 $235.02 24 Mar 2026 $243.56 25 Mar 2026 $243.68 26 Mar 2026 $225.12 27 Mar 2026 $223.18 30 Mar 2026 $210.47 31 Mar 2026 $229.81 1 Apr 2026 $235.96 2 Apr 2026 $234.66 6 Apr 2026 $236.98 7 Apr 2026 $238.17 8 Apr 2026 $256.01 9 Apr 2026 $263.25 10 Apr 2026 $268.77 13 Apr 2026 $273.18 14 Apr 2026 $274.15 15 Apr 2026 $269.00 16 Apr 2026 $269.89 17 Apr 2026 $278.59 20 Apr 2026 $279.93 21 Apr 2026 $273.77 22 Apr 2026 $278.45 23 Apr 2026 $280.56 24 Apr 2026 $280.98 27 Apr 2026 $278.36 28 Apr 2026 $267.90 29 Apr 2026 $265.44 30 Apr 2026 $283.75 1 May 2026 $279.38 4 May 2026 $291.53 5 May 2026 $287.65 6 May 2026 $293.77 7 May 2026 $300.79 8 May 2026 $313.21 11 May 2026 $319.71 12 May 2026 $311.72 13 May 2026 $317.31 14 May 2026 $313.81 15 May 2026 $303.17 18 May 2026 $295.70 19 May 2026 $294.04 20 May 2026 $311.51 21 May 2026 $313.16 22 May 2026 $320.62 26 May 2026 $334.11 27 May 2026 $328.01 28 May 2026 $323.41 29 May 2026 $324.26 1 Jun 2026 $317.62 2 Jun 2026 $331.36 3 Jun 2026 $335.15 4 Jun 2026 $330.23 5 Jun 2026 $301.65 8 Jun 2026 $312.09 9 Jun 2026 $320.96 10 Jun 2026 $316.07 11 Jun 2026 $345.32 12 Jun 2026 $355.69 15 Jun 2026 $375.32 16 Jun 2026 $366.31 17 Jun 2026 $371.26 18 Jun 2026 $406.37 22 Jun 2026 $420.56 23 Jun 2026 $389.17 24 Jun 2026 $381.62 25 Jun 2026 $410.31 26 Jun 2026 $388.61 29 Jun 2026 $416.00 30 Jun 2026 $444.80 1 Jul 2026 $411.05 2 Jul 2026 $365.56 6 Jul 2026 $368.06 7 Jul 2026 $349.57 8 Jul 2026 $349.39 9 Jul 2026 $368.78 10 Jul 2026 $368.58 13 Jul 2026 $352.03 14 Jul 2026 $358.43 15 Jul 2026 $353.80 16 Jul 2026 $332.00 17 Jul 2026 $324.69 20 Jul 2026 $324.28 21 Jul 2026 $345.44 22 Jul 2026 $344.84 23 Jul 2026 $345.30 24 Jul 2026 $329.18 27 Jul 2026 $315.70 28 Jul 2026 $285.31 29 Jul 2026 $257.61 30 Jul 2026 $293.30 31 Jul 2026 $297.45 3 Aug 2026 $309.98 4 Aug 2026 $320.76 5 Aug 2026 $313.10 6 Aug 2026 $291.31 7 Aug 2026 $304.99 10 Aug 2026 $292.35 11 Aug 2026 $294.38 12 Aug 2026 $306.83 13 Aug 2026 $306.29 14 Aug 2026 $310.73 17 Aug 2026 $320.74 18 Aug 2026 $300.24 19 Aug 2026 $281.60 20 Aug 2026 $281.88 21 Aug 2026 $279.11 24 Aug 2026 $269.06 25 Aug 2026 $270.48 26 Aug 2026 $271.75 27 Aug 2026 $270.99 28 Aug 2026 $255.76 31 Aug 2026 $256.24 1 Sep 2026 $246.44 2 Sep 2026 $251.38 3 Sep 2026 $249.65 4 Sep 2026 $260.31 8 Sep 2026 $265.50 9 Sep 2026 $268.05 10 Sep 2026 $261.84 11 Sep 2026 $267.31 14 Sep 2026 $239.27 15 Sep 2026 $231.50 16 Sep 2026 $235.28 17 Sep 2026 $240.23 18 Sep 2026 $252.08 21 Sep 2026 $256.92 22 Sep 2026 $260.37 23 Sep 2026 $262.72 24 Sep 2026 $257.98 25 Sep 2026 $260.82 28 Sep 2026 $258.38 29 Sep 2026 $266.02 30 Sep 2026 $265.36 1 Oct 2026 $271.24 2 Oct 2026 $279.15 5 Oct 2026 $280.50 6 Oct 2026 $281.41 7 Oct 2026 $273.15 8 Oct 2026 $260.38 9 Oct 2026 $264.50 Schreiner James Alan EVP & COO Sold on a plan $98.60K 22 Oct 2025 · at $138.68 · 3.1% of stake Mora Elizabeth Director Sold on a plan $47.64K 2 Dec 2025 · at $158.81 · 1.6% of stake Moloney Jacqueline F Director Sold at will $205.22K 20 Feb 2026 · at $247.55 · 7.2% of stake CANNONE PETER III Director Sold at will $322.57K 20 Feb 2026 · at $258.06 · 13.0% of stake Taranto Eric Robert EVP & GM, VSD Sold at will $359.62K 20 Feb 2026 · at $247.55 · 6.8% of stake McCarthy Michelle M VP & Chief Accounting Officer Sold at will $366.50K 20 Feb 2026 · at $250.00 · 100% of stake Henry David Philip EVP, Global Str Mktg & GM, MSD Sold at will $523.12K 20 Feb 2026 · at $261.56 · 9.6% of stake Williams John Edward EVP & GM, PSD Sold at will $523.74K 20 Feb 2026 · at $256.41 · 35.9% of stake Burke Kathleen Flaherty EVP, GC & Secretary Sold at will $1.06M 20 Feb 2026 · at $250.00 · 7.3% of stake COLELLA GERALD G Director Sold at will $2.53M 20 Feb 2026 · at $252.90 · 16.7% of stake Lee John Tseng-Chung President & CEO Sold at will $7.70M 20 Feb 2026 · at $256.77 · 16.2% of stake Schreiner James Alan EVP & COO Sold at will $1.05M 24 Feb 2026 · at $255.00 · 14.9% of stake COLELLA GERALD G Director Sold at will $2.54M 24 Feb 2026 · at $253.97 · 20.0% of stake Mora Elizabeth Director Sold on a plan $71.83K 2 Mar 2026 · at $239.44 · 1.6% of stake Taranto Eric Robert EVP & GM, VSD Sold at will $1.01M 6 Mar 2026 · at $220.52 · 22.8% of stake Moloney Jacqueline F Director Sold at will $72.71K 12 Mar 2026 · at $213.77 · 3.2% of stake Taranto Eric Robert EVP & GM, VSD Sold at will $911.33K 11 May 2026 · at $319.93 · 18.4% of stake Burke Kathleen Flaherty EVP, GC & Secretary Sold at will $1.39M 11 May 2026 · at $319.94 · 8.1% of stake Moloney Jacqueline F Director Sold at will $446.59K 13 May 2026 · at $318.99 · 12.5% of stake Moloney Jacqueline F Director Sold at will $312.20K 14 May 2026 · at $312.20 · 10.2% of stake CANNONE PETER III Director Sold at will $409.59K 18 May 2026 · at $303.40 · 14.8% of stake Mayampurath Ramakumar EVP & CFO Sold on a plan $2.78M 22 May 2026 · at $315.48 · 100.0% of stake Lee John Tseng-Chung President & CEO Sold on a plan $3.15M 22 May 2026 · at $315.48 · 6.5% of stake Henry David Philip EVP, Global Str Mktg & GM, MSD Sold on a plan $826.25K 26 May 2026 · at $330.50 · 13.3% of stake Donahue Joseph B Director Sold at will $688.70K 27 May 2026 · at $327.95 · 17.3% of stake COLELLA GERALD G Director Sold on a plan $6.67M 27 May 2026 · at $333.40 · 50.0% of stake Mora Elizabeth Director Sold on a plan $95.41K 1 Jun 2026 · at $318.02 · 1.5% of stake Henry David Philip EVP, Global Str Mktg & GM, MSD Sold at will $1.89M 1 Jun 2026 · at $314.43 · 36.5% of stake McCarthy Michelle M SVP & Chief Accounting Officer Sold on a plan $767.27K 5 Jun 2026 · at $315.23 · 99.9% of stake Schreiner James Alan EVP & COO Sold on a plan $247.91K 10 Jun 2026 · at $317.42 · 3.3% of stake Schreiner James Alan EVP & COO Sold at will $1.21M 12 Jun 2026 · at $345.82 · 15.4% of stake Williams John Edward EVP & GM, PSD Sold on a plan $131.76K 3 Aug 2026 · at $288.31 · 10.0% of stake Lee John Tseng-Chung President & CEO Sold on a plan $3.02M 14 Aug 2026 · at $302.01 · 6.9% of stake Mora Elizabeth Director Sold on a plan $75.29K 1 Sep 2026 · at $250.96 · 1.6% of stake
0 buys21 sales at will13 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$3.93B
Net income
$295.00M
Free cash flow
$497.00M
Gross margin
46.7%
Operating margin
13.4%
Net margin
7.5%
Return on equity
10.9%
Return on capital
7.5%
Debt to equity
1.53
Revenue growth, 1 yr
9.6%
Revenue growth, 5 yr
11.0% a year
EPS growth, 1 yr
55.5%

Revenue and net income

Fiscal years, as filed with the SEC · point at a year for the detail
2.3B 350M FY20 Fiscal year 2020 Revenue $2.33B Net income $350.00M Margin 15.0% 3B 551M FY21 Fiscal year 2021 Revenue $2.95B Net income $551.00M Margin 18.7% · growth +26.6% 3.5B 333M FY22 Fiscal year 2022 Revenue $3.55B Net income $333.00M Margin 9.4% · growth +20.2% 3.6B -1.8B FY23 Fiscal year 2023 Revenue $3.62B Net income $1.84B Margin -50.8% · growth +2.1% 3.6B 190M FY24 Fiscal year 2024 Revenue $3.59B Net income $190.00M Margin 5.3% · growth -1.0% 3.9B 295M FY25 Fiscal year 2025 Revenue $3.93B Net income $295.00M Margin 7.5% · growth +9.6%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
1 Sep 2026 Mora Elizabeth
Director
Sold on a plan $75.29K 1.6%
14 Aug 2026 Lee John Tseng-Chung
President & CEO
Sold on a plan $3.02M 6.9%
3 Aug 2026 Williams John Edward
EVP & GM, PSD
Sold on a plan $131.76K 10.0%
12 Jun 2026 Schreiner James Alan
EVP & COO
Sold at will $1.21M 15.4%
10 Jun 2026 Schreiner James Alan
EVP & COO
Sold on a plan $247.91K 3.3%
5 Jun 2026 McCarthy Michelle M
SVP & Chief Accounting Officer
Sold on a plan $767.27K 99.9%