WallStSmart

Costco Wholesale Corp (COST)vsWestern Digital Corporation (WDC)

VS

Smart Verdict

WallStSmart Research — data-driven comparison

Costco Wholesale Corp generates 2393% more annual revenue ($293.59B vs $11.78B). WDC leads profitability with a 55.3% profit margin vs 3.0%. WDC appears more attractively valued with a PEG of 0.58. WDC earns a higher WallStSmart Score of 80/100 (A-).

COST

Buy

61

out of 100

Grade: C+

Growth: 8.0Profit: 6.5Value: 3.7Quality: 6.3
Piotroski: 4/9Altman Z: 4.84

WDC

Exceptional Buy

80

out of 100

Grade: A-

Growth: 7.3Profit: 9.5Value: 5.7Quality: 6.5
Piotroski: 5/9Altman Z: 1.51

Key Strengths & Concerns

Side-by-side fundamental analysis

Key Strengths

COST6 strengths · Avg: 8.8/10
Market CapQuality
$434.37B10/10

Mega-cap, among the largest globally

Altman Z-ScoreHealth
4.8410/10

Safe zone — low bankruptcy risk

Return on EquityProfitability
26.8%9/10

Every $100 of equity generates 27 in profit

Revenue GrowthGrowth
21.5%8/10

Revenue surging 21.5% year-over-year

EPS GrowthGrowth
45.5%8/10

Earnings expanding 45.5% YoY

Free Cash FlowQuality
$2.04B8/10

Generating 2.0B in free cash flow

WDC6 strengths · Avg: 10.0/10
Market CapQuality
$225.26B10/10

Mega-cap, among the largest globally

Return on EquityProfitability
67.0%10/10

Every $100 of equity generates 67 in profit

Profit MarginProfitability
55.3%10/10

Keeps 55 of every $100 in revenue as profit

Operating MarginProfitability
37.0%10/10

Strong operational efficiency at 37.0%

Revenue GrowthGrowth
45.5%10/10

Revenue surging 45.5% year-over-year

EPS GrowthGrowth
482.9%10/10

Earnings expanding 482.9% YoY

Areas to Watch

COST4 concerns · Avg: 2.5/10
Profit MarginProfitability
3.0%3/10

3.0% margin — thin

Operating MarginProfitability
3.7%3/10

Operating margin of 3.7%

PEG RatioValuation
4.802/10

Expensive relative to growth rate

P/E RatioValuation
49.3x2/10

Premium valuation, high expectations priced in

WDC3 concerns · Avg: 3.3/10
P/E RatioValuation
39.1x4/10

Premium valuation, high expectations priced in

Altman Z-ScoreHealth
1.514/10

Distress zone — elevated risk

Price/BookValuation
27.5x2/10

Trading at 27.5x book value

Comparative Analysis Report

WallStSmart Research

Bull Case : COST

The strongest argument for COST centers on Market Cap, Altman Z-Score, Return on Equity. Revenue growth of 21.5% demonstrates continued momentum.

Bull Case : WDC

The strongest argument for WDC centers on Market Cap, Return on Equity, Profit Margin. Profitability is solid with margins at 55.3% and operating margin at 37.0%. Revenue growth of 45.5% demonstrates continued momentum.

Bear Case : COST

The primary concerns for COST are Profit Margin, Operating Margin, PEG Ratio. A P/E of 49.3x leaves little room for execution misses. Thin 3.0% margins leave little buffer for downturns.

Bear Case : WDC

The primary concerns for WDC are P/E Ratio, Altman Z-Score, Price/Book.

Key Dynamics to Monitor

WDC carries more volatility with a beta of 2.20 — expect wider price swings.

WDC is growing revenue faster at 45.5% — sustainability is the question.

COST generates stronger free cash flow (2.0B), providing more financial flexibility.

Monitor DISCOUNT STORES industry trends, competitive dynamics, and regulatory changes.

Bottom Line

WDC scores higher overall (80/100 vs 61/100), backed by strong 55.3% margins and 45.5% revenue growth. Both earn "Exceptional Buy" and "Buy" ratings respectively — the choice depends on your investment horizon and risk tolerance.

This analysis is generated from publicly available financial data. Not financial advice.

Costco Wholesale Corp

CONSUMER DEFENSIVE · DISCOUNT STORES · USA

Costco Wholesale Corporation (doing business as Costco Wholesale and also known simply as Costco) is an American multinational corporation which operates a chain of membership-only (needing a membership to shop there) big-box retail stores. As of 2020, Costco was the fifth largest retailer in the world, and the world's largest retailer of choice and prime beef, organic foods, rotisserie chicken, and wine as of 2016.

Visit Website →

Western Digital Corporation

TECHNOLOGY · COMPUTER HARDWARE · USA

Western Digital Corporation (WDC, commonly known as Western Digital or WD) is an American computer hard disk drive manufacturer and data storage company, headquartered in San Jose, California. It designs, manufactures and sells data technology products, including storage devices, data center systems and cloud storage services.

Want to dig deeper into these stocks?