SNDK vs WDC vs PENG Stock Comparison

Sandisk, Western Digital and Penguin Solutions Prices as of Oct 23, 2026 Peers: Industry group
SNDK Sandisk Corp
$1,238.03 -31.8% 1M +641.1% 1Y
Market cap
$184.51B
P/E
16.1x
Revenue (TTM)
$20.25B
Div. yield
–
Server and Storage Hardware Technology
6 wins
WDC Western Digital Corp
$343.67 -27.4% 1M +173.4% 1Y
Market cap
$130.38B
P/E
13.0x
Revenue (TTM)
$14.48B
Div. yield
0.00%
Server and Storage Hardware Technology
5 wins
PENG Penguin Solutions, Inc.
$53.41 -0.9% 1M +145.8% 1Y
Market cap
$2.91B
P/E
19.3x
Revenue (TTM)
$1.73B
Div. yield
–
Server and Storage Hardware Technology

Head to Head

11 decided of 12

Sandisk leads on 6 of the 12 questions below (Sandisk 6, Western Digital 5). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionSNDKWDCPENGLeader
Larger companyMarket capitalisation $184.51B $130.38B $2.91B SNDK
Cheaper on earningsLower P/E, profitable companies only 16.1x 13.0x 19.3x WDC
Cheaper on forward earningsLower price / next fiscal year consensus EPS 6.1x 17.1x 12.6x SNDK
Faster revenue growthRevenue growth, trailing twelve months +175.3% +43.0% +26.5% SNDK
More profitableNet margin, trailing twelve months 56.5% 69.2% 8.7% WDC
Better return on capitalReturn on invested capital 73.7% 53.8% 14.9% SNDK
Less leveragedLower net debt / EBITDA — -0.1x 0.6x WDC
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +641.1% +173.4% +145.8% SNDK
Better 5-year returnAnnualised price return, 5 years — +51.5%/yr +16.5%/yr WDC
Less volatileAnnualised volatility, 1 year 112.1% 81.0% 85.6% WDC
Higher overall scoreMean of the five percentile scores vs peers 79/100 79/100 53/100 SNDK

Percentile Scorecard

SNDKWDCPENG

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

AxisSNDKWDCPENG
Valuation 67 #38 of 112 56 #50 of 112 41 #66 of 112
Growth 100 #1 of 109 99 #2 of 109 69 #34 of 109
Profitability 100 #1 of 105 97 #4 of 105 55 #48 of 105
Financial Health 82 #22 of 117 68 #38 of 117 22 #92 of 117
Shareholder Returns 47 #44 of 82 75 #21 of 82 78 #19 of 82
Overall 79 79 53
  • SNDK ranked among 122 companies in Computer Hardware
  • WDC ranked among 122 companies in Computer Hardware
  • PENG ranked among 122 companies in Computer Hardware

Price Performance

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

Returns

PeriodSNDKWDCPENGSPY
1 month -31.8%-27.4%-0.9% -1.0%
3 months -13.8%-33.9%-0.8% +2.9%
6 months +25.1%-14.9%+74.0% +6.4%
Year to date +421.5%+99.5%+173.1% +11.4%
1 year +641.1%+173.4%+145.8% +13.1%
3 years —+958.4%+297.4% +79.4%
3 years, per year —+119.7%+58.4% +21.5%
5 years —+697.0%+114.2% +67.7%
5 years, per year —+51.5%+16.5% +10.9%
10 years —+756.8%— +255.2%
10 years, per year —+24.0%— +13.5%

Risk

MeasureSNDKWDCPENGSPY
Volatility, 1Y 112.1%81.0%85.6% 12.7%
Downside volatility, 1Y 105.7%81.8%80.0% 12.7%
Beta vs S&P 500, 1Y 3.943.103.62 1.00
Return / volatility, 1Y 5.722.141.70 1.03
Max drawdown, 5Y -56.5%-55.5%-65.4% -25.4%
From 52-week high -47.0%-53.9%-34.4% -2.5%
52-week high $2,335.00$746.23$81.39 $779.14
52-week low $167.05$124.92$16.24 $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.

MultipleSNDKWDCPENG
P/E now vs peer median 15.9xmedian 31.3x 12.6xmedian 31.3x 18.7xmedian 31.3x
P/S now vs peer median 8.9xmedian 2.6x 8.9xmedian 2.6x 1.9xmedian 2.6x
EV/EBITDA now vs peer median 14.0xmedian 19.6x 21.0xmedian 19.6x 15.4xmedian 19.6x
P/FCF now vs peer median 15.7xmedian 28.3x 30.0xmedian 28.3x -19.7xmedian 28.3x
P/B now vs peer median 11.5xmedian 2.9x 13.8xmedian 2.9x 6.0xmedian 2.9x
PEG now vs peer median —median 1.15 0.17median 1.15 0.48median 1.15

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 monthsSNDKWDCPENG
Revenue $20.25B $14.48B $1.73B
Gross profit $14.47B $7.62B $478.93M
Operating income $12.39B $5.71B $165.60M
Net income $11.43B $10.02B $185.79M
Free cash flow $11.49B $4.29B -$163.48M
R&D $1.33B $1.15B $81.68M
EPS (diluted) $73.76 $26.10 $2.57
Cash & equivalents $4.76B $1.31B $647.21M
Total debt – $12.58B $788.95M
Shares (diluted) 155.00M 384.00M 58.83M
Enterprise value $173.03B $120.21B $875.82M

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
MetricSNDKWDCPENG
P/E 15.9x 12.6x 18.7x
P/FCF 15.7x 30.0x -19.7x
P/Operating cash flow 15.5x 26.5x -21.2x
P/S 8.9x 8.9x 1.9x
P/B 11.5x 13.8x 6.0x
P/Tangible book 11.5x 13.8x 6.7x
EV/EBITDA 14.0x 21.0x 15.4x
EV/EBIT 14.2x 22.4x 20.3x
EV/Revenue 8.7x 8.8x 1.9x
EV/FCF 15.3x 29.9x -20.5x
EV/Operating cash flow 15.1x 26.4x -22.1x
PEG (3Y EPS CAGR) – 0.17 0.48

Growth

14 metrics
MetricSNDKWDCPENG
Revenue growth (1Y) 175.3% 43.0% 26.5%
Revenue CAGR (3Y) – 57.4% 6.3%
Gross profit growth (1Y) 554.2% 85.2% 21.5%
Gross profit CAGR (3Y) – 126.7% 4.9%
Operating income growth (1Y) 999.7% 104.4% 184.8%
Operating income CAGR (3Y) – 85.5% 166.5%
Net income growth (1Y) 796.7% 288.7% 544.3%
Net income CAGR (3Y) – 83.2% 44.1%
EPS growth (1Y) 751.8% 286.8% 791.5%
EPS CAGR (3Y) – 75.8% 39.3%
Operating cash flow growth (1Y) 13,794% 108.7% -234.2%
Operating cash flow CAGR (3Y) – 88.3% -51.2%
Free cash flow growth (1Y) 9,678% 121.1% -256.9%
Free cash flow CAGR (3Y) – 66.0% -65.3%

Profitability

14 metrics
MetricSNDKWDCPENG
Gross margin 71.5% 52.6% 27.7%
EBITDA margin 62.0% 42.1% 12.6%
Operating margin 61.2% 39.4% 9.6%
Pretax margin 64.3% 73.2% 8.8%
Net margin 56.5% 69.2% 8.7%
FCF margin 56.8% 29.6% -9.4%
Operating cash flow margin 57.6% 33.6% -8.8%
Return on equity 77.5% 110.0% 37.5%
Return on assets 57.8% 71.3% 7.5%
Return on invested capital 73.7% 53.8% 14.9%
Return on capital employed 87.2% 57.3% 12.9%
Asset turnover 1.0x 1.0x 0.7x
Cash conversion (OCF / net income) 1.0x 0.5x -0.8x
Stock comp / revenue 1.1% 1.6% 1.8%

Financial Health

11 metrics
MetricSNDKWDCPENG
Debt / assets – 5.5% 28.4%
Debt / equity – 0.1x 1.5x
Net debt / EBITDA – -0.1x 0.6x
Debt / FCF – 0.2x -4.8x
Liabilities / assets 30.1% 34.3% 80.7%
Equity / assets 69.9% 65.7% 19.3%
Interest coverage 169.7x 48.8x –
Current ratio 2.3x 1.4x 1.9x
Quick ratio 12.2x 0.9x 1.2x
Cash ratio 0.9x 0.3x 0.5x
Altman Z-score 19.72 19.18 2.24

Shareholder Returns

7 metrics
MetricSNDKWDCPENG
Dividend yield – 0.2% –
Net buyback yield 0.0% 2.3% 2.0%
Shareholder yield 0.0% 2.5% 2.0%
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.

ConsensusSNDKWDCPENG
Forward P/E 6.1xFY2027 17.1xFY2027 12.6xFY2027
EPS, next fiscal year $204.34FY2027 $20.13FY2027 $4.25FY2027
EPS growth, next FY +188.3%FY2027 +97.0%FY2027 +48.1%FY2027
EPS growth, the year after +35.4% +69.7% +31.5%
Revenue, next fiscal year $50.54BFY2027 $18.27BFY2027 $2.52BFY2027
Revenue growth, next FY +149.6%FY2027 +41.4%FY2027 +45.9%FY2027
Revenue growth, the year after +9.9% +36.7% +4.7%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersSNDKWDCPENG
Held by institutions 74.3% 93.7% 100.0%
Institutions holding 1,816 1,845 351
Change in shares held, QoQ -1.9% -1.3% +0.1%
Institutions buying 1,269 1,127 229
Institutions selling 457 596 100
Buyers to sellers 2.78 1.89 2.29

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.

SNDKWDCPENG
SNDK 1.00 0.73 0.46
WDC 0.73 1.00 0.44
PENG 0.46 0.44 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, SNDK, WDC and PENG?

Sandisk (SNDK) is the largest by market capitalisation: Sandisk (SNDK) $184.51B, Western Digital (WDC) $130.38B, Penguin Solutions (PENG) $2.91B.

Which stock is cheaper, SNDK, WDC and PENG?

Western Digital (WDC) trades on the lowest price-to-earnings ratio (Sandisk (SNDK) 16.1x, Western Digital (WDC) 13.0x, Penguin Solutions (PENG) 19.3x). On next year's consensus earnings, Sandisk (SNDK) is cheapest (Sandisk (SNDK) 6.1x, Western Digital (WDC) 17.1x, Penguin Solutions (PENG) 12.6x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Sandisk (SNDK) grew revenue fastest over the trailing twelve months: Sandisk (SNDK) +175.3%, Western Digital (WDC) +43.0%, Penguin Solutions (PENG) +26.5%.

Which company is more profitable?

Western Digital (WDC) has the highest net margin (Sandisk (SNDK) 56.5%, Western Digital (WDC) 69.2%, Penguin Solutions (PENG) 8.7%). On return on invested capital, Sandisk (SNDK) leads (Sandisk (SNDK) 73.7%, Western Digital (WDC) 53.8%, Penguin Solutions (PENG) 14.9%).

Which stock has performed better?

Over the past year Sandisk (SNDK) returned the most: Sandisk (SNDK) +641.1%, Western Digital (WDC) +173.4%, Penguin Solutions (PENG) +145.8%. Over five years, Western Digital (WDC) compounded fastest (Western Digital (WDC) +51.5%/yr, Penguin Solutions (PENG) +16.5%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Sandisk (SNDK) 0.00%, Western Digital (WDC) 0.00%, Penguin Solutions (PENG) 0.00%. Sandisk (SNDK) and Penguin Solutions (PENG) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Western Digital (WDC) has been the steadiest (Sandisk (SNDK) 112.1%, Western Digital (WDC) 81.0%, Penguin Solutions (PENG) 85.6%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, SNDK, WDC and PENG?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Sandisk (SNDK) leads on 6. 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.