Mks (MKSI) Latest Stock Analysis Report – Oct 15, 2026, 4:00 PM ET
Updated Oct 15, 2026, 4:00 PM ET
- Closed at $228.52, -2.55% vs the prior close of $234.50.
- Volume 2.57M shares, 2.0x its 50-day average (heavy).
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
MKSI dips 2.6% to $228.52, a 6-month low on 2.0x normal volume. Closed at $228.52, -2.55% vs the prior close of $234.50. Day range $212.35–$230.57, opened at $224.32.
MKSI daily analysis — what happened
A plain-English, data-only note written after every US trading day. Newest first; older days stay archived below.
Oct 15, 2026 — MKSI dips 2.6% to $228.52, a 6-month low on 2.0x normal volume
- Closed at $228.52, -2.55% vs the prior close of $234.50. Day range $212.35–$230.57, opened at $224.32.
- Volume was 2.57M shares, 2.0x its 50-day average of 1.30M — unusually heavy trading.
- Price is -14.7% vs its 50-day average ($267.86) and -17.3% vs its 200-day average ($276.47).
- 52-week range $130.72–$447.62; today's close sits at 31% of that range, 48.9% below the 52-week high.
- That makes 4 straight losses.
Oct 14, 2026 — MKSI slides 5.3% to $234.50, 3 down days in a row
- Closed at $234.50, -5.28% vs the prior close of $247.56. Day range $232.20–$244.54, opened at $241.02.
- Volume was 1.68M shares, 1.3x its 50-day average of 1.33M.
- Price is -13.0% vs its 50-day average ($269.55) and -15.1% vs its 200-day average ($276.14).
- 52-week range $126.92–$447.62; today's close sits at 34% of that range, 47.6% below the 52-week high.
- That makes 3 straight losses.
Oct 13, 2026 — MKSI dips 0.9% to $247.56
- Closed at $247.56, -0.94% vs the prior close of $249.91. Day range $238.14–$249.52, opened at $242.35.
- Volume was 1.69M shares, 1.3x its 50-day average of 1.32M.
- Price is -8.7% vs its 50-day average ($271.28) and -10.2% vs its 200-day average ($275.79).
- 52-week range $126.92–$447.62; today's close sits at 38% of that range, 44.7% below the 52-week high.
Oct 12, 2026 — MKSI slides 5.5% to $249.91
- Closed at $249.91, -5.52% vs the prior close of $264.50. Day range $249.81–$261.18, opened at $261.18.
- Volume was 1.36M shares, 1.0x its 50-day average of 1.32M.
- Price is -8.3% vs its 50-day average ($272.52) and -9.2% vs its 200-day average ($275.37).
- 52-week range $120.91–$447.62; today's close sits at 39% of that range, 44.2% below the 52-week high.
Oct 9, 2026 — MKSI rises 1.6% to $264.50
- Closed at $264.50, +1.58% vs the prior close of $260.38. Day range $256.65–$267.96, opened at $266.09.
- Volume was 636.40K shares, 0.5x its 50-day average of 1.37M — lighter than usual.
- Price is -3.3% vs its 50-day average ($273.48) and -3.8% vs its 200-day average ($274.93).
- 52-week range $120.91–$447.62; today's close sits at 44% of that range, 40.9% below the 52-week high.
Oct 8, 2026 — MKSI slides 4.7% to $260.38
- Closed at $260.38, -4.68% vs the prior close of $273.15. Day range $257.60–$274.07, opened at $266.69.
- Volume was 1.28M shares, 0.9x its 50-day average of 1.39M.
- Price is -5.0% vs its 50-day average ($274.05) and -5.1% vs its 200-day average ($274.42).
- 52-week range $120.91–$447.62; today's close sits at 43% of that range, 41.8% below the 52-week high.
Oct 7, 2026 — MKSI dips 2.9% to $273.15
- Closed at $273.15, -2.94% vs the prior close of $281.41. Day range $269.11–$274.99, opened at $271.72.
- Volume was 1.01M shares, 0.7x its 50-day average of 1.41M.
- Price is -0.3% vs its 50-day average ($274.00) and -0.3% vs its 200-day average ($273.92).
- 52-week range $120.91–$447.62; today's close sits at 47% of that range, 39.0% below the 52-week high.
Oct 6, 2026 — MKSI rises 0.3% to $281.41, a 1-month high, 4 up days in a row
- Closed at $281.41, +0.32% vs the prior close of $280.50. Day range $276.56–$286.38, opened at $285.40.
- Volume was 1.06M shares, 0.7x its 50-day average of 1.42M.
- Price is +2.6% vs its 50-day average ($274.24) and +3.0% vs its 200-day average ($273.33).
- 52-week range $120.91–$447.62; today's close sits at 49% of that range, 37.1% below the 52-week high.
- That makes 4 straight gains.
Oct 5, 2026 — MKSI rises 0.5% to $280.50, a 1-month high, 3 up days in a row
- Closed at $280.50, +0.48% vs the prior close of $279.15. Day range $273.60–$284.21, opened at $279.79.
- Volume was 1.13M shares, 0.8x its 50-day average of 1.41M.
- Price is +2.0% vs its 50-day average ($274.92) and +2.9% vs its 200-day average ($272.67).
- 52-week range $120.91–$447.62; today's close sits at 49% of that range, 37.3% below the 52-week high.
- That makes 3 straight gains.
Oct 2, 2026 — MKSI rises 2.9% to $279.15, a 1-month high
- Closed at $279.15, +2.92% vs the prior close of $271.24. Day range $278.91–$284.63, opened at $284.10.
- Volume was 1.35M shares, 1.0x its 50-day average of 1.40M.
- Price is +1.2% vs its 50-day average ($275.90) and +2.6% vs its 200-day average ($272.05).
- 52-week range $120.91–$447.62; today's close sits at 48% of that range, 37.6% below the 52-week high.
MKSI latest news & SEC filings
Every SEC filing by or about MKSI in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Sep 3, 2026 · SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Sep 2, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Mora Elizabeth sold 300 shares at $250.96 (≈$75.29K) on Sep 1, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 1, 2026 · 144 — Notice of proposed sale (Form 144)
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 18, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 17, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Lee John Tseng-Chung sold 10,000 shares at $302.01 (≈$3.02M) on Aug 14, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Aug 14, 2026 · 144 — Notice of proposed sale (Form 144)
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 6, 2026 · 10-Q — Quarterly report (unaudited financial statements for the quarter)
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $1.25B (prior year $973.00M) (+28.3% vs Jun 30, 2025)
- Net income: $175.00M (prior year $62.00M) (+182.3% vs Jun 30, 2025)
- Diluted EPS: $2.41 (prior year $0.92) (+162.0% vs Jun 30, 2025)
Aug 5, 2026 · 8-K — Current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Aug 4, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Williams John Edward sold 457 shares at $288.31 (≈$131.76K) on Aug 3, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Jul 24, 2026 · SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Jul 16, 2026 · SCHEDULE 13G — Passive stake (13G)
Passive stake (13G) — an investor reported owning more than 5%
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Things to know before you trade MKSI
- Last results release: Aug 5, 2026 (8-K Item 2.02). Previous ones: May 6, 2026, Feb 17, 2026, Jan 21, 2026. Based on that rhythm, the next report is likely around Nov 4, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 2.28% (largest 5.5%).
- Liquidity: about 1.33M shares (≈$303.25M) trade per day on average.
- 52-week position: $228.52 vs a range of $130.72–$447.62 (31% of the range).
- Dividends: last ex-dividend date Aug 25, 2026 ($0.25/share); 4 payments in the past 12 months.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 0 open-market buys, 25 sales; latest: Elizabeth Mora sold 300 shares on Sep 1, 2026.
- Latest filings: 10-Q Aug 6, 2026; 8-K Aug 5, 2026; 8-K May 12, 2026.
- Share count: 67.62M shares outstanding (Jul 28, 2026), +0.7% vs a year earlier.
- Listing: Nasdaq · industry: Industrial Instruments For Measurement, Display, and Control.
MKSI market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 15, 2026 | 224.32 | 230.57 | 212.35 | 228.52 | 2.57M |
| Oct 14, 2026 | 241.02 | 244.54 | 232.20 | 234.50 | 1.68M |
| Oct 13, 2026 | 242.35 | 249.52 | 238.14 | 247.56 | 1.69M |
| Oct 12, 2026 | 261.18 | 261.18 | 249.81 | 249.91 | 1.36M |
| Oct 9, 2026 | 266.09 | 267.96 | 256.65 | 264.50 | 636.40K |
| Oct 8, 2026 | 266.69 | 274.07 | 257.60 | 260.38 | 1.28M |
| Oct 7, 2026 | 271.72 | 274.99 | 269.11 | 273.15 | 1.01M |
| Oct 6, 2026 | 285.40 | 286.38 | 276.56 | 281.41 | 1.06M |
| Oct 5, 2026 | 279.79 | 284.21 | 273.60 | 280.50 | 1.13M |
| Oct 2, 2026 | 284.10 | 284.63 | 278.91 | 279.15 | 1.35M |
| Oct 1, 2026 | 265.57 | 275.48 | 262.77 | 271.24 | 1.34M |
| Sep 30, 2026 | 267.82 | 268.00 | 260.23 | 265.36 | 751.20K |
| Sep 29, 2026 | 264.18 | 266.28 | 261.36 | 266.02 | 807.00K |
| Sep 28, 2026 | 259.56 | 259.69 | 251.19 | 258.38 | 1.09M |
| Sep 25, 2026 | 261.01 | 262.66 | 257.90 | 260.82 | 683.20K |
| Sep 24, 2026 | 256.64 | 259.82 | 254.21 | 257.98 | 695.20K |
| Sep 23, 2026 | 260.37 | 263.78 | 253.41 | 262.72 | 1.53M |
| Sep 22, 2026 | 253.50 | 260.66 | 252.60 | 260.37 | 2.71M |
| Sep 21, 2026 | 258.20 | 259.00 | 251.79 | 256.92 | 946.30K |
| Sep 18, 2026 | 244.03 | 252.38 | 243.00 | 252.08 | 2.23M |
About Mks
Mks (MKSI) is listed on the Nasdaq and classified by the SEC under “Industrial Instruments For Measurement, Display, and Control”. Its business address is in ANDOVER, MA. State of incorporation: MA. Fiscal year ends December 31. SEC CIK 1049502.
MKSI board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Raj Batra | Director | May 12, 2026 |
| Peter Iii Cannone | Director | May 19, 2026 |
| Gerald G Colella | Director | May 28, 2026 |
| Joseph B Donahue | Director | May 28, 2026 |
| Wissam G Jabre | Director | May 12, 2026 |
| John Tseng-Chung Lee | President & CEO | Aug 17, 2026 |
| Jacqueline F Moloney | Director | May 15, 2026 |
| Elizabeth Mora | Director | Sep 2, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Kathleen Flaherty Burke | EVP, GC & Secretary | May 12, 2026 |
| Renee Martel Donlan | EVP, GC & CCO | Aug 18, 2026 |
| David Philip Henry | EVP, Global Str Mktg & GM, MSD | Jun 2, 2026 |
| John Tseng-Chung Lee | President & CEO | Aug 17, 2026 |
| Ramakumar Mayampurath | EVP & CFO | May 26, 2026 |
| Michelle M Mccarthy | SVP & Chief Accounting Officer | Jun 8, 2026 |
| James Alan Schreiner | EVP & COO | Jun 16, 2026 |
| Eric Robert Taranto | EVP & GM, VSD | May 12, 2026 |
| John Edward Williams | EVP & GM, PSD | Aug 4, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Sep 1, 2026 | Elizabeth Mora | Sale | 300 | $250.96 |
| Aug 14, 2026 | John Tseng-Chung Lee | Sale | 10,000 | $302.01 |
| Aug 3, 2026 | John Edward Williams | Sale | 457 | $288.31 |
| Jun 12, 2026 | James Alan Schreiner | Sale | 812 | $346.41 |
| Jun 12, 2026 | James Alan Schreiner | Sale | 2,471 | $345.52 |
| Jun 12, 2026 | James Alan Schreiner | Sale | 217 | $347.00 |
| Jun 10, 2026 | James Alan Schreiner | Sale | 781 | $317.42 |
| Jun 5, 2026 | Michelle M Mccarthy | Sale | 2,434 | $315.23 |
| Jun 1, 2026 | David Philip Henry | Sale | 6,000 | $314.43 |
| Jun 1, 2026 | Elizabeth Mora | Sale | 300 | $318.02 |
| May 27, 2026 | Joseph B Donahue | Sale | 2,100 | $327.95 |
| May 27, 2026 | Gerald G Colella | Sale | 464 | $330.38 |
| May 27, 2026 | Gerald G Colella | Sale | 8,210 | $331.45 |
| May 27, 2026 | Gerald G Colella | Sale | 4,876 | $332.04 |
| May 27, 2026 | Gerald G Colella | Sale | 1,811 | $335.46 |
MKSI financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $3.93B | $295.00M | 4.37 | $645.00M |
| Dec 31, 2024 | $3.59B | $190.00M | 2.81 | $528.00M |
| Dec 31, 2023 | $3.62B | $-1.84B | -27.54 | $319.00M |
| Dec 31, 2022 | $3.55B | $333.00M | 5.56 | $529.00M |
| Dec 31, 2021 | $2.95B | $551.00M | 9.90 | $640.00M |
Latest balance sheet: total assets $8.94B, total liabilities $5.95B, cash $454.00M (as of Jun 30, 2026).
MKSI earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 5, 2026 | 8-K Item 2.02 (results) | $313.10 |
| May 6, 2026 | 8-K Item 2.02 (results) | $293.77 |
| Feb 17, 2026 | 8-K Item 2.02 (results) | $262.94 |
| Jan 21, 2026 | 8-K Item 2.02 (results) | $220.73 |
| Nov 5, 2025 | 8-K Item 2.02 (results) | $139.92 |
| Aug 6, 2025 | 8-K Item 2.02 (results) | $89.62 |
| May 7, 2025 | 8-K Item 2.02 (results) | $74.30 |
| Feb 12, 2025 | 8-K Item 2.02 (results) | $111.20 |
| Nov 6, 2024 | 8-K Item 2.02 (results) | $103.29 |
| Aug 7, 2024 | 8-K Item 2.02 (results) | — |
| May 8, 2024 | 8-K Item 2.02 (results) | — |
| Feb 7, 2024 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 15, 2026, 4:00 PM ET. Filings: SEC EDGAR. Updated after every US trading day.