BLK vs COST: Which Is the Better Buy?
Side-by-side comparison of BlackRock, Inc. and Costco Wholesale Corporation — fair value, conviction, valuation metrics, and QuantHub research signals.
Updated 2026-09-25.
BlackRock, Inc. · Financial Services
$1,069.78
+44.0% upside to fair value
High Conviction
Grade A
High Quality
VS
Costco Wholesale Corporation · Consumer Defensive
$896.48
+24.7% upside to fair value
Med Conviction
Grade B
High Quality
QuantHub Verdict
BLK has more upside to fair value
(+44.0%).
These are model outputs — not personalized investment advice.
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Valuation & Fundamentals
| Metric |
BLK |
COST |
| Current Price |
$1,069.78 |
$896.48 |
| Fair Value Estimate |
$1,540.94 |
$1,117.50 |
| Upside to Fair Value |
+44.0%
|
+24.7%
|
| Market Cap |
$165.8B |
$397.6B |
| Forward P/E |
—
|
—
|
| EV / EBITDA |
15.9x
|
32.7x
|
| Price / Sales |
6.1x
|
1.3x
|
| Price / FCF |
71.5x
|
42.4x
|
| Revenue Growth YoY |
+30.6%
|
+11.1%
|
| Gross Margin |
55.7%
|
17.5%
|
| Operating Margin |
31.1%
|
3.9%
|
| Return on Equity |
11.7%
|
28.0%
|
| Dividend Yield |
2.09% |
0.62% |
| FCF Yield |
1.4%
|
2.36%
|
| Analyst Consensus |
Strong Buy
|
Strong Buy
|
Investment Thesis
BlackRock is the world's largest asset manager, overseeing $15.345 trillion in assets across ETFs, active strategies, alternatives, and the Aladdin investment-technology platform, serving institutional, intermediary, and individual clients globally. The business quality is high: TTM gross margin of 55.7%, operating margin of 31.1%, and net margin of 24.1% reflect the scalability of a fee-based mo…
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…
Accumulation Zones
| Metric |
BLK |
COST |
| Zone Low |
$1,155.70 |
$838.12 |
| Zone High |
$1,309.80 |
$949.88 |
| In Buy Zone? |
Yes
|
Yes
|