COST vs WDC: Which Is the Better Buy?
Side-by-side comparison of Costco Wholesale Corporation and Western Digital Corporation — fair value, conviction, valuation metrics, and QuantHub research signals.
Updated 2026-09-25.
Costco Wholesale Corporation · Consumer Defensive
$896.48
+24.7% upside to fair value
Med Conviction
Grade B
High Quality
VS
Western Digital Corporation · Technology
$441.36
-16.8% upside to fair value
Med Conviction
Grade C
QuantHub Verdict
COST has more upside to fair value
(+24.7%).
These are model outputs — not personalized investment advice.
See all research →
Valuation & Fundamentals
| Metric |
COST |
WDC |
| Current Price |
$896.48 |
$441.36 |
| Fair Value Estimate |
$1,117.50 |
$367.30 |
| Upside to Fair Value |
+24.7%
|
-16.8%
|
| Market Cap |
$397.6B |
$152.1B |
| Forward P/E |
—
|
—
|
| EV / EBITDA |
32.7x
|
17.4x
|
| Price / Sales |
1.3x
|
11.8x
|
| Price / FCF |
42.4x
|
47.3x
|
| Revenue Growth YoY |
+11.1%
|
+43.8%
|
| Gross Margin |
17.5%
|
48.9%
|
| Operating Margin |
3.9%
|
34.9%
|
| Return on Equity |
28.0%
|
118.6%
|
| Dividend Yield |
0.62% |
0.12% |
| FCF Yield |
2.36%
|
2.12%
|
| Analyst Consensus |
Strong Buy
|
Strong Buy
|
Investment Thesis
Costco Wholesale Corporation operates a global network of membership-based warehouse clubs, selling branded and private-label merchandise across the United States, Canada, Mexico, Japan, the United Kingdom, South Korea, Taiwan, Australia, Spain, France, Iceland, and China, supplemented by pharmacies, optical centers, food courts, hearing aid centers, tire installation, 636 gas stations, and e-com…
Western Digital designs and manufactures hard disk drives and flash-based storage for data centers, client devices, and consumer markets, and it is currently enjoying an extraordinary demand surge tied to AI infrastructure buildouts. In the most recent quarter, revenue grew 43.8% year over year and earnings grew 1143.2% year over year, while trailing twelve-month gross margin reached 48.9%, opera…
Accumulation Zones
| Metric |
COST |
WDC |
| Zone Low |
$838.12 |
$275.48 |
| Zone High |
$949.88 |
$312.20 |
| In Buy Zone? |
Yes
|
No
|