MKSI
MKS Instruments
PE ratio, current and historical analysis
- Stocks
- Technology
- NASDAQ: MKSI
- PE Ratio
As of Aug 21, 2026, the MKS Instruments stock's PE ratio is 42.74. This takes into account the latest EPS of $6.53 and stock price of $279.11. The PE ratio marks a decrease of 6% from its last 4 quarters average of 45.4.
MKSI PE ratio history
The PE ratio of MKS Instruments has averaged 55.08 over the last ten years. The current P/E ratio of 42.74 is 22% lower than the historical average. Looking back at the last ten years, MKSI's PE ratio peaked in the Jun 2024 quarter at 932.71, when the price was $130.58 and the EPS was $0.14. The lowest point was in the Dec 2018 quarter, when it reached 8.95 with a price of $64.61 and an EPS of $7.22.
MKS Instruments PE ratio by year
Maximum annual increase: 378.32% in 2019
Maximum annual decrease: -62.23% in 2014
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 36.4 | -1.67% | $159.8 | $4.39 |
| 2024 | 37.02 | N/A | $104.39 | $2.82 |
| 2023 | N/A | N/A | $102.87 | -$27.54 |
| 2022 | 15.21 | -13.09% | $84.73 | $5.57 |
| 2021 | 17.5 | -26.04% | $174.17 | $9.95 |
| 2020 | 23.66 | -44.73% | $150.45 | $6.36 |
| 2019 | 42.81 | 378.32% | $110.01 | $2.57 |
| 2018 | 8.95 | -40.73% | $64.61 | $7.22 |
| 2017 | 15.1 | -50.18% | $94.5 | $6.26 |
| 2016 | 30.31 | 93.67% | $59.4 | $1.96 |
| 2015 | 15.65 | -7.23% | $36 | $2.3 |
| 2014 | 16.87 | -62.23% | $36.6 | $2.17 |
| 2013 | 44.66 | 57.64% | $29.92 | $0.67 |
| 2012 | 28.33 | 153.63% | $25.78 | $0.91 |
| 2011 | 11.17 | 29.88% | $27.82 | $2.49 |
MKS Instruments PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Jun 2026 | 68.12 | 44.05% | $444.8 | $6.53 |
| Mar 2026 | 47.29 | 29.92% | $229.81 | $4.86 |
| Dec 2025 | 36.4 | 21.45% | $159.8 | $4.39 |
| Sep 2025 | 29.97 | 19.17% | $123.77 | $4.13 |
| Jun 2025 | 25.15 | 5.76% | $99.36 | $3.95 |
| Mar 2025 | 23.78 | -35.76% | $80.15 | $3.37 |
| Dec 2024 | 37.02 | -83.99% | $104.39 | $2.82 |
| Sep 2024 | 231.3 | -75.2% | $108.71 | $0.47 |
| Jun 2024 | 932.71 | N/A | $130.58 | $0.14 |
| Mar 2024 | N/A | N/A | $133 | -$26.67 |
| Dec 2023 | N/A | N/A | $102.87 | -$27.54 |
| Sep 2023 | N/A | N/A | $86.54 | -$25.8 |
| Jun 2023 | N/A | N/A | $108.1 | -$26.3 |
| Mar 2023 | 35.45 | 133.07% | $88.62 | $2.5 |
| Dec 2022 | 15.21 | 41.88% | $84.73 | $5.57 |
MKSI Price vs fair value
MKSI average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
The current PE ratio of MKSI is lower than its 3, 5 and 10-year averages.
PE comparison
With a price to earnings (P/E) of 42.74, MKSI ranks higher than the Technology sector and the industry average but lower than its peers average. In comparison with the Technology sector average of 32.38, MKS Instruments's price to earnings (P/E) is 32% higher.
MKSI PE vs peers
Frequently asked questions
What is MKS Instruments's PE ratio?
The price to earnings ratio for MKSI stock as of Aug 21, 2026, stands at 42.74.
What is the 3-year average PE ratio for MKS Instruments (MKSI)?
The 3-year average price to earnings ratio for MKSI stock is 159.08.
What is the 5-year average PE ratio for MKS Instruments (MKSI)?
The 5-year average price to earnings ratio for MKSI stock is 96.97.
What is the highest PE ratio for MKSI?
The highest quarterly PE ratio in the last ten years has been 932.71 and it was in the Jun 2024 quarter.
How does the current PE ratio for MKSI compare to its historical average?
MKSI's price to earnings ratio is currently 22% below its 10-year historical average.
How is MKSI's PE ratio calculated (MKS Instruments PE ratio formula)?
You can calculate the P/E ratio by dividing the most recent stock price by the trailing twelve months EPS. As of today (Aug 21, 2026), MKS Instruments's share price is $279.11. The company's earnings per share for the trailing twelve months (TTM) ending Jun 2026 is $6.53. Therefore, MKS Instruments's PE ratio for today is 42.74. PE RATIO(42.74) = STOCK PRICE($279.11) / TTM EPS($6.53)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.