MKS Inc. (MKSI) P/E Ratio History
Historical price-to-earnings valuation from 1999 to 2025
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MKSI Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
As of May 6, 2026, MKS Inc. (MKSI) trades at a price-to-earnings ratio of 65.8x, with a stock price of $287.65 and trailing twelve-month earnings per share of $4.34.
The current P/E is 29% below its 5-year average of 92.1x. Over the past five years, MKSI's P/E has ranged from a low of 10.3x to a high of 1187.1x, placing the current valuation at the 90th percentile of its historical range.
Compared to the Technology sector median P/E of 26.7x, MKSI trades at a 146% premium to its sector peers. The sector includes 358 companies with P/E ratios ranging from 0.0x to 197.6x.
Relative to the broader market, MKSI commands a significant premium over the S&P 500 median P/E of 25.1x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our MKSI DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
MKSI P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $23B | 96.3 | - | -20% | |
| $15B | 109.7 | 3.17 | -32% | |
| $5B | 90.0 | 27.31 | -17% | |
| $4B | 30.8 | 3.53 | -16% | |
| $4B | 13.0Lowest | - | +26% | |
| $326B | 47.4 | 2.76Best | +1% | |
| $344B | 66.5 | 2.97 | +43%Best |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
MKSI Historical P/E Data (1999–2025)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2025 Q4 | Wed Dec 31 2025 00:00:00 GM | $159.80 | $4.37 | 36.6x | -16% |
| FY2025 Q3 | $123.77 | $4.12 | 30.0x | -31% | |
| FY2025 Q2 | Mon Jun 30 2025 00:00:00 GM | $99.36 | $3.94 | 25.2x | -42% |
| FY2025 Q1 | Mon Mar 31 2025 00:00:00 GM | $80.15 | $3.35 | 23.9x | -45% |
| FY2024 Q4 | $104.39 | $2.80 | 37.3x | -14% | |
| FY2024 Q3 | Mon Sep 30 2024 00:00:00 GM | $108.71 | $0.45 | 241.6x | +456% |
| FY2024 Q2 | Sun Jun 30 2024 00:00:00 GM | $130.58 | $0.11 | 1187.1x | +2630% |
| FY2023 Q1 | Fri Mar 31 2023 00:00:00 GM | $88.62 | $2.58 | 34.3x | -21% |
| FY2022 Q4 | Sat Dec 31 2022 00:00:00 GM | $84.73 | $5.79 | 14.6x | -66% |
| FY2022 Q3 | Fri Sep 30 2022 00:00:00 GM | $82.64 | $7.68 | 10.8x | -75% |
| FY2022 Q2 | $102.63 | $9.97 | 10.3x | -76% | |
| FY2022 Q1 | $150.00 | $10.28 | 14.6x | -66% |
Average P/E for displayed period: 43.5x
Full MKSI Stock Analysis
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Start ComparisonMKSI — Frequently Asked Questions
Quick answers to the most common questions about buying MKSI stock.
Is MKSI stock overvalued or undervalued?
MKSI trades at 65.8x P/E, below its 5-year average of 92.1x. At the 90th percentile of historical range, the stock is priced at a discount to its own history.
How does MKSI's valuation compare to peers?
MKS Inc. P/E of 65.8x compares to sector median of 26.7x. The premium reflects expected growth above peers.
What is MKSI's PEG ratio?
MKSI PEG ratio is N/A. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 1999-2025.