MKSI vs ONTO vs ACMR Stock Comparison

Mks, Onto Innovation and ACM Research Prices as of Oct 29, 2026 Peers: Industry group
MKSI Mks Inc
$216.17 -18.7% 1M +52.9% 1Y
Market cap
$13.55B
P/E
30.8x
Revenue (TTM)
$4.35B
Div. yield
0.00%
Semiconductor Equipment Technology
4 wins
ONTO Onto Innovation Inc.
$221.78 -27.2% 1M +61.8% 1Y
Market cap
$9.85B
P/E
74.3x
Revenue (TTM)
$1.12B
Div. yield
–
Semiconductor Equipment Technology
3 wins
ACMR ACM Research, Inc.
$49.29 -34.8% 1M +16.9% 1Y
Market cap
$3.06B
P/E
20.4x
Revenue (TTM)
$1.04B
Div. yield
–
Semiconductor Equipment Technology
4 wins

Head to Head

11 decided of 12

Mks leads on 4 of the 12 questions below (Mks 4, ACM Research 4, Onto Innovation 3). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionMKSIONTOACMRLeader
Larger companyMarket capitalisation $13.55B $9.85B $3.06B MKSI
Cheaper on earningsLower P/E, profitable companies only 30.8x 74.3x 20.4x ACMR
Cheaper on forward earningsLower price / next fiscal year consensus EPS 16.0x 26.3x 21.6x MKSI
Faster revenue growthRevenue growth, trailing twelve months +16.3% +8.1% +27.3% ACMR
More profitableNet margin, trailing twelve months 10.1% 11.8% 14.5% ACMR
Better return on capitalReturn on invested capital 8.9% — 4.7% MKSI
Less leveragedLower net debt / EBITDA 3.2x — -4.6x ACMR
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +52.9% +61.8% +16.9% ONTO
Better 5-year returnAnnualised price return, 5 years +7.6%/yr +22.9%/yr +6.9%/yr ONTO
Less volatileAnnualised volatility, 1 year 61.8% 72.1% 87.9% MKSI
Higher overall scoreMean of the five percentile scores vs peers 55/100 59/100 46/100 ONTO

Percentile Scorecard

MKSIONTOACMR

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisMKSIONTOACMR
Valuation 76 #23 of 94 57 #41 of 94 71 #28 of 94
Growth 73 #26 of 92 32 #63 of 92 58 #39 of 92
Profitability 62 #34 of 88 56 #39 of 88 37 #56 of 88
Financial Health 1 #95 of 96 56 #43 of 96 59 #40 of 96
Shareholder Returns 63 #27 of 72 94 #5 of 72 3 #70 of 72
Overall 55 59 46
  • MKSI ranked among 103 companies in Semiconductors
  • ONTO ranked among 103 companies in Semiconductors
  • ACMR ranked among 103 companies in Semiconductors

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodMKSIONTOACMRSPY
1 month -18.7%-27.2%-34.8% +0.7%
3 months -26.3%-11.4%-37.3% +3.7%
6 months -23.8%-24.8%-4.6% +7.1%
Year to date +35.3%+40.5%+24.9% +12.8%
1 year +52.9%+61.8%+16.9% +11.9%
3 years +230.9%+98.0%+284.8% +85.2%
3 years, per year +49.1%+25.6%+56.7% +22.8%
5 years +44.1%+180.0%+39.3% +67.6%
5 years, per year +7.6%+22.9%+6.9% +10.9%
10 years +335.4%—— +262.0%
10 years, per year +15.9%—— +13.7%

Risk

MeasureMKSIONTOACMRSPY
Volatility, 1Y 61.8%72.1%87.9% 12.7%
Downside volatility, 1Y 65.8%72.9%92.5% 12.6%
Beta vs S&P 500, 1Y 2.823.183.62 1.00
Return / volatility, 1Y 0.860.860.19 0.94
Max drawdown, 5Y -67.5%-62.8%-83.9% -25.4%
From 52-week high -51.4%-41.4%-61.2% -1.2%
52-week high $444.80$378.45$126.89 $779.14
52-week low $137.20$124.09$29.67 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleMKSIONTOACMR
P/E now vs peer median 33.2xmedian 46.4x 82.6xmedian 46.4x 22.3xmedian 46.4x
P/S now vs peer median 3.4xmedian 7.8x 9.7xmedian 7.8x 3.1xmedian 7.8x
EV/EBITDA now vs peer median 17.2xmedian 27.5x 41.2xmedian 27.5x 15.4xmedian 27.5x
P/FCF now vs peer median 32.1xmedian 40.1x 43.1xmedian 40.1x -26.8xmedian 40.1x
P/B now vs peer median 4.9xmedian 4.7x 5.7xmedian 4.7x 1.3xmedian 4.7x
PEG now vs peer median 1.08median 2.10 -9.39median 2.10 0.82median 2.10

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsMKSIONTOACMR
Revenue $4.35B $1.12B $1.04B
Gross profit $2.04B $564.06M $454.91M
Operating income $681.00M $134.61M $137.88M
Net income $439.00M $132.61M $209.10M
Free cash flow $455.00M $252.47M -$118.74M
R&D $310.00M $142.63M $162.47M
EPS (diluted) $6.05 $2.67 $2.09
Cash & equivalents $611.00M $1.25B $969.23M
Total debt $3.94B – $340.91M
Shares (diluted) 72.70M 49.68M 71.84M
Enterprise value $10.99B $5.69B -$809.79M

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricMKSIONTOACMR
P/E 33.2x 82.6x 22.3x
P/FCF 32.1x 43.1x -26.8x
P/Operating cash flow 23.0x 40.8x -482.7x
P/S 3.4x 9.7x 3.1x
P/B 4.9x 5.7x 1.3x
P/Tangible book 15.0x 6.5x 1.3x
EV/EBITDA 17.2x 41.2x 15.4x
EV/EBIT 26.4x 66.8x 17.8x
EV/Revenue 4.1x 8.0x 2.4x
EV/FCF 39.4x 35.6x -20.7x
EV/Operating cash flow 28.3x 33.8x -371.6x
PEG (3Y EPS CAGR) 1.08 -9.39 0.82

Growth

14 metrics
MetricMKSIONTOACMR
Revenue growth (1Y) 16.3% 8.1% 27.3%
Revenue CAGR (3Y) 4.2% 7.7% 31.1%
Gross profit growth (1Y) 15.4% 5.6% 13.0%
Gross profit CAGR (3Y) 6.7% 5.4% 25.8%
Operating income growth (1Y) 33.5% -29.5% -5.3%
Operating income CAGR (3Y) 35.4% -8.3% 16.3%
Net income growth (1Y) 64.4% -33.7% 50.4%
Net income CAGR (3Y) 31.0% -8.6% 35.6%
EPS growth (1Y) 52.8% -34.5% 25.8%
EPS CAGR (3Y) 30.7% -8.8% 27.1%
Operating cash flow growth (1Y) -1.6% -2.5% -110.8%
Operating cash flow CAGR (3Y) 20.7% 17.7% 30.9%
Free cash flow growth (1Y) -13.3% 5.9% -717.8%
Free cash flow CAGR (3Y) 22.9% 22.0% 2.3%

Profitability

14 metrics
MetricMKSIONTOACMR
Gross margin 47.0% 50.4% 43.8%
EBITDA margin 24.0% 19.5% 15.4%
Operating margin 15.7% 12.0% 13.3%
Pretax margin 11.2% 14.1% 22.7%
Net margin 10.1% 11.8% 14.5%
FCF margin 10.5% 22.5% -11.4%
Operating cash flow margin 14.6% 23.8% -0.6%
Return on equity 15.2% 6.5% 9.3%
Return on assets 5.0% 4.4% 6.5%
Return on invested capital 8.9% – 4.7%
Return on capital employed 10.6% 4.8% 5.6%
Asset turnover 0.5x 0.4x 0.3x
Cash conversion (OCF / net income) 1.4x 2.0x 0.0x
Stock comp / revenue 1.3% 2.8% 2.5%

Financial Health

11 metrics
MetricMKSIONTOACMR
Debt / assets 44.1% – 10.0%
Debt / equity 1.3x – 0.1x
Net debt / EBITDA 3.2x – -4.6x
Debt / FCF 8.7x – -2.9x
Liabilities / assets 66.6% 48.0% 29.2%
Equity / assets 33.4% 52.0% 70.8%
Interest coverage 3.7x – 18.1x
Current ratio 1.1x 9.7x 3.7x
Quick ratio 0.6x 8.2x 2.1x
Cash ratio 0.3x 6.9x 1.4x
Altman Z-score 2.40 5.18 3.29

Shareholder Returns

7 metrics
MetricMKSIONTOACMR
Dividend yield 0.4% – –
Net buyback yield – 1.7% -25.5%
Shareholder yield 0.4% 1.7% -25.5%
Payout ratio (earnings) 14.4% – –
Payout ratio (FCF) 13.8% – –
Dividend growth (1Y) 6.8% – –
Dividend CAGR (3Y) 3.4% – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusMKSIONTOACMR
Forward P/E 16.0xFY2026 26.3xFY2026 21.6xFY2026
EPS, next fiscal year $13.48FY2026 $8.42FY2026 $2.28FY2026
EPS growth, next FY +71.1%FY2026 +70.4%FY2026 +41.6%FY2026
EPS growth, the year after +34.9% +43.5% +44.3%
Revenue, next fiscal year $5.43BFY2026 $1.37BFY2026 $1.15BFY2026
Revenue growth, next FY +38.1%FY2026 +35.5%FY2026 +27.1%FY2026
Revenue growth, the year after +8.0% +41.1% +38.4%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersMKSIONTOACMR
Held by institutions 100.0% 98.3% 75.0%
Institutions holding 776 689 376
Change in shares held, QoQ +2.8% +2.3% +9.2%
Institutions buying 455 376 246
Institutions selling 253 232 90
Buyers to sellers 1.80 1.62 2.73

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

MKSIONTOACMR
MKSI 1.00 0.83 0.69
ONTO 0.83 1.00 0.67
ACMR 0.69 0.67 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, MKSI, ONTO and ACMR?

Mks (MKSI) is the largest by market capitalisation: Mks (MKSI) $13.55B, Onto Innovation (ONTO) $9.85B, ACM Research (ACMR) $3.06B.

Which stock is cheaper, MKSI, ONTO and ACMR?

ACM Research (ACMR) trades on the lowest price-to-earnings ratio (Mks (MKSI) 30.8x, Onto Innovation (ONTO) 74.3x, ACM Research (ACMR) 20.4x). On next year's consensus earnings, Mks (MKSI) is cheapest (Mks (MKSI) 16.0x, Onto Innovation (ONTO) 26.3x, ACM Research (ACMR) 21.6x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

ACM Research (ACMR) grew revenue fastest over the trailing twelve months: Mks (MKSI) +16.3%, Onto Innovation (ONTO) +8.1%, ACM Research (ACMR) +27.3%.

Which company is more profitable?

ACM Research (ACMR) has the highest net margin (Mks (MKSI) 10.1%, Onto Innovation (ONTO) 11.8%, ACM Research (ACMR) 14.5%). On return on invested capital, Mks (MKSI) leads (Mks (MKSI) 8.9%, ACM Research (ACMR) 4.7%).

Which stock has performed better?

Over the past year Onto Innovation (ONTO) returned the most: Mks (MKSI) +52.9%, Onto Innovation (ONTO) +61.8%, ACM Research (ACMR) +16.9%. Over five years, Onto Innovation (ONTO) compounded fastest (Mks (MKSI) +7.6%/yr, Onto Innovation (ONTO) +22.9%/yr, ACM Research (ACMR) +6.9%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Mks (MKSI) 0.00%, Onto Innovation (ONTO) 0.00%, ACM Research (ACMR) 0.00%. Onto Innovation (ONTO) and ACM Research (ACMR) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Mks (MKSI) has been the steadiest (Mks (MKSI) 61.8%, Onto Innovation (ONTO) 72.1%, ACM Research (ACMR) 87.9%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, MKSI, ONTO and ACMR?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Mks (MKSI) leads on 4. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.