SIMO vs WDC vs ARM Stock Comparison

Silicon Motion Technology, Western Digital and Arm Holdings Prices as of Oct 27, 2026 Peers: Industry group
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WDC Western Digital Corp
$380.88 -16.6% 1M +200.7% 1Y
Market cap
$144.41B
P/E
14.4x
Revenue (TTM)
$14.48B
Div. yield
0.00%
Server and Storage Hardware Technology
7 wins
ARM Arm Holdings Plc /Uk
$226.60 -27.0% 1M +26.9% 1Y
Market cap
$248.66B
P/E
238.2x
Revenue (TTM)
$5.16B
Div. yield
–
Semiconductor Design Technology
2 wins

Head to Head

9 decided of 12

Western Digital leads on 7 of the 12 questions below (Western Digital 7, Arm Holdings 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionSIMOWDCARMLeader
Larger companyMarket capitalisation $7.36B $144.41B $248.66B ARM
Cheaper on earningsLower P/E, profitable companies only — 14.4x 238.2x WDC
Cheaper on forward earningsLower price / next fiscal year consensus EPS 17.8x 15.8x 109.5x WDC
Faster revenue growthRevenue growth, trailing twelve months — +43.0% +25.1% WDC
More profitableNet margin, trailing twelve months — 69.2% 20.2% WDC
Better return on capitalReturn on invested capital — 53.8% — –
Less leveragedLower net debt / EBITDA — -0.1x — –
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +98.3% +200.7% +26.9% WDC
Better 5-year returnAnnualised price return, 5 years +24.0%/yr +54.5%/yr — WDC
Less volatileAnnualised volatility, 1 year 84.4% 81.3% 78.9% ARM
Higher overall scoreMean of the five percentile scores vs peers 36/100 77/100 62/100 WDC

Percentile Scorecard

SIMOWDCARM

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

AxisSIMOWDCARM
Valuation 14 #81 of 94 51 #55 of 112 8 #87 of 94
Growth 26 #68 of 92 98 #3 of 109 88 #12 of 92
Profitability – 97 #4 of 104 78 #21 of 90
Financial Health 36 #64 of 99 66 #40 of 116 77 #24 of 99
Shareholder Returns 67 #25 of 73 73 #23 of 81 –
Overall 36 77 62
  • SIMO ranked among 103 companies in Semiconductors
  • WDC ranked among 122 companies in Computer Hardware
  • ARM ranked among 103 companies in Semiconductors

Price Performance

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

Returns

PeriodSIMOWDCARMSPY
1 month -26.1%-16.6%-27.0% -0.2%
3 months -7.8%-17.8%-7.4% +3.9%
6 months +36.9%-2.6%+14.1% +8.2%
Year to date +120.2%+121.1%+107.3% +12.9%
1 year +98.3%+200.7%+26.9% +12.3%
3 years +287.9%+1,192.9%+361.6% +87.4%
3 years, per year +57.2%+134.8%+66.6% +23.3%
5 years +192.8%+779.6%— +67.9%
5 years, per year +24.0%+54.5%— +10.9%
10 years +339.9%+745.8%— +261.1%
10 years, per year +16.0%+23.8%— +13.7%

Risk

MeasureSIMOWDCARMSPY
Volatility, 1Y 84.4%81.3%78.9% 12.7%
Downside volatility, 1Y 78.0%82.1%71.2% 12.7%
Beta vs S&P 500, 1Y 2.423.173.46 1.00
Return / volatility, 1Y 1.162.470.34 0.97
Max drawdown, 5Y -59.1%-55.5%-54.0% -25.4%
From 52-week high -39.4%-49.0%-48.4% -1.2%
52-week high $336.90$746.23$439.46 $779.14
52-week low $80.16$124.92$104.55 $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.

MultipleSIMOWDCARM
P/E now vs peer median —median 45.6x 13.9xmedian 33.2x 230.3xmedian 45.6x
P/S now vs peer median —median 7.7x 9.8xmedian 2.8x 46.6xmedian 7.7x
EV/EBITDA now vs peer median —median 29.0x 23.3xmedian 20.0x 204.3xmedian 29.0x
P/FCF now vs peer median -533.1xmedian 40.6x 33.2xmedian 29.8x 119.5xmedian 40.6x
P/B now vs peer median 6.5xmedian 4.6x 15.3xmedian 3.0x 27.9xmedian 4.6x
PEG now vs peer median —median 2.28 0.18median 1.17 6.49median 2.28

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 monthsSIMOWDCARM
Revenue – $14.48B $5.16B
Gross profit – $7.62B $5.03B
Operating income – $5.71B $877.00M
Net income $289.77M $10.02B $1.04B
Free cash flow -$12.85M $4.29B $2.01B
R&D – $1.15B $2.96B
EPS (diluted) – $26.10 $0.98
Cash & equivalents $74.37M $1.31B $3.06B
Total debt $167.29M $12.58B –
Shares (diluted) 33.68M 384.00M 1.07B
Enterprise value $6.75B $134.24B $234.37B

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
MetricSIMOWDCARM
P/E – 13.9x 230.3x
P/FCF -533.1x 33.2x 119.5x
P/Operating cash flow -102.8x 29.3x 114.8x
P/S – 9.8x 46.6x
P/B 6.5x 15.3x 27.9x
P/Tangible book 7.2x 15.3x 28.6x
EV/EBITDA – 23.3x 204.3x
EV/EBIT – 24.9x 269.7x
EV/Revenue – 9.8x 45.9x
EV/FCF -531.9x 33.1x 117.6x
EV/Operating cash flow -102.6x 29.2x 113.0x
PEG (3Y EPS CAGR) – 0.18 6.49

Growth

14 metrics
MetricSIMOWDCARM
Revenue growth (1Y) – 43.0% 25.1%
Revenue CAGR (3Y) – 57.4% 24.7%
Gross profit growth (1Y) – 85.2% 25.6%
Gross profit CAGR (3Y) – 126.7% 25.4%
Operating income growth (1Y) – 104.4% 14.9%
Operating income CAGR (3Y) – 85.5% 21.6%
Net income growth (1Y) 270.6% 288.7% 49.4%
Net income CAGR (3Y) 49.0% 83.2% 37.2%
EPS growth (1Y) – 286.8% 48.7%
EPS CAGR (3Y) – 75.8% 35.5%
Operating cash flow growth (1Y) -182.4% 108.7% 105.5%
Operating cash flow CAGR (3Y) -36.3% 88.3% 34.7%
Free cash flow growth (1Y) -109.8% 121.1% 121.8%
Free cash flow CAGR (3Y) -27.6% 66.0% 33.3%

Profitability

14 metrics
MetricSIMOWDCARM
Gross margin – 52.6% 97.5%
EBITDA margin – 42.1% 22.5%
Operating margin – 39.4% 17.0%
Pretax margin – 73.2% 24.5%
Net margin – 69.2% 20.2%
FCF margin – 29.6% 39.0%
Operating cash flow margin – 33.6% 40.6%
Return on equity – 110.0% 16.3%
Return on assets – 71.3% 12.6%
Return on invested capital – 53.8% –
Return on capital employed – 57.3% 9.0%
Asset turnover – 1.0x 0.5x
Cash conversion (OCF / net income) -0.2x 0.5x 2.0x
Stock comp / revenue – 1.6% 22.4%

Financial Health

11 metrics
MetricSIMOWDCARM
Debt / assets 3.7% 5.5% –
Debt / equity 0.1x 0.1x –
Net debt / EBITDA – -0.1x –
Debt / FCF -4.6x 0.2x –
Liabilities / assets 34.8% 34.3% 22.9%
Equity / assets 65.2% 65.7% 77.1%
Interest coverage – 48.8x –
Current ratio 2.5x 1.4x 5.3x
Quick ratio 0.8x 0.9x 4.9x
Cash ratio 0.2x 0.3x 3.2x
Altman Z-score – 20.89 58.08

Shareholder Returns

7 metrics
MetricSIMOWDCARM
Dividend yield 1.0% 0.1% –
Net buyback yield – 2.1% –
Shareholder yield 1.0% 2.3% –
Payout ratio (earnings) – 2.0% –
Payout ratio (FCF) – 4.6% –
Dividend growth (1Y) – 151.3% –
Dividend CAGR (3Y) – – –

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.

ConsensusSIMOWDCARM
Forward P/E 17.8xFY2026 15.8xFY2027 109.5xFY2026
EPS, next fiscal year $11.50FY2026 $24.04FY2027 $2.07FY2026
EPS growth, next FY +223.9%FY2026 +135.2%FY2027 +16.9%FY2026
EPS growth, the year after +37.5% +70.9% +49.8%
Revenue, next fiscal year $1.82BFY2026 $20.04BFY2027 $5.71BFY2026
Revenue growth, next FY +105.0%FY2026 +55.1%FY2027 +16.0%FY2026
Revenue growth, the year after +27.4% +39.2% +38.7%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersSIMOWDCARM
Held by institutions 72.4% 93.7% 9.3%
Institutions holding 380 1,846 955
Change in shares held, QoQ -9.8% -1.3% +12.4%
Institutions buying 223 1,127 593
Institutions selling 131 597 257
Buyers to sellers 1.70 1.89 2.31

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.

SIMOWDCARM
SIMO 1.00 0.51 0.42
WDC 0.51 1.00 0.45
ARM 0.42 0.45 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, SIMO, WDC and ARM?

Arm Holdings (ARM) is the largest by market capitalisation: Silicon Motion Technology (SIMO) $7.36B, Western Digital (WDC) $144.41B, Arm Holdings (ARM) $248.66B.

Which stock is cheaper, SIMO, WDC and ARM?

Western Digital (WDC) trades on the lowest price-to-earnings ratio (Western Digital (WDC) 14.4x, Arm Holdings (ARM) 238.2x). On next year's consensus earnings, Western Digital (WDC) is cheapest (Silicon Motion Technology (SIMO) 17.8x, Western Digital (WDC) 15.8x, Arm Holdings (ARM) 109.5x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Western Digital (WDC) grew revenue fastest over the trailing twelve months: Western Digital (WDC) +43.0%, Arm Holdings (ARM) +25.1%.

Which company is more profitable?

Western Digital (WDC) has the highest net margin (Western Digital (WDC) 69.2%, Arm Holdings (ARM) 20.2%).

Which stock has performed better?

Over the past year Western Digital (WDC) returned the most: Silicon Motion Technology (SIMO) +98.3%, Western Digital (WDC) +200.7%, Arm Holdings (ARM) +26.9%. Over five years, Western Digital (WDC) compounded fastest (Silicon Motion Technology (SIMO) +24.0%/yr, Western Digital (WDC) +54.5%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Silicon Motion Technology (SIMO) 0.00%, Western Digital (WDC) 0.00%, Arm Holdings (ARM) 0.00%. Silicon Motion Technology (SIMO) and Arm Holdings (ARM) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Arm Holdings (ARM) has been the steadiest (Silicon Motion Technology (SIMO) 84.4%, Western Digital (WDC) 81.3%, Arm Holdings (ARM) 78.9%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, SIMO, WDC and ARM?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Western Digital (WDC) leads on 7. 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.