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Mega Caps

The world’s largest companies (US$200bn+).

Mega-caps are the market’s giants — companies worth $200bn or more that set the tone for entire sectors. This collection ranks the largest listed companies across the UK and US by market capitalisation.

93 stocksSorted by market capUpdated 16 Jul 2026

Why it matters

The world’s largest companies (US$200bn+). Benchmark collections are a clean way to compare market leaders, index heavyweights and size segments without building a screen from scratch.

What to check next

Compare sector mix, valuation, quality and risk across the group rather than assuming larger companies are automatically safer.

Main risk

Large benchmark names can become crowded, expensive or overly exposed to one macro factor despite appearing diversified at first glance.

Showing the 40 largest of 93 — sort or filter to explore the rest.

Company	Market Cap	Reward	Risk	Yield
NVIDIA CorporationNVDA	$4.8T	—	—	0.0%
Apple IncAAPL	$4.3T	—	—	0.4%
Alphabet Inc Class CGOOG	$3.8T	—	—	0.3%
Microsoft CorporationMSFT	$3.0T	—	—	0.9%
Amazon.com IncAMZN	$2.8T	—	—	—
Space Exploration Technologies Corp. Class A Common StockSPCX	$2.4T	—	—	—
Taiwan Semiconductor ManufacturingTSM	$1.9T	—	—	0.9%
Broadcom IncAVGO	$1.9T	—	—	0.6%
Meta Platforms Inc.META	$1.7T	—	—	0.3%
Tesla IncTSLA	$1.5T	—	—	—
Berkshire Hathaway IncBRK-B	$1.0T	—	—	—
Walmart Inc. Common StockWMT	$1.0T	—	—	0.8%
Eli Lilly and CompanyLLY	$970.6B	—	—	0.6%
JPMorgan Chase & CoJPM	$818.0B	—	—	1.9%
Exxon Mobil CorpXOM	$635.4B	—	—	2.7%
Visa Inc. Class AV	$617.2B	—	—	0.8%
Tencent Holdings LtdTCTZF	$595.6B	—	—	6.3%
Johnson & JohnsonJNJ	$590.8B	—	—	2.1%
Advanced Micro Devices IncAMD	$549.6B	—	—	—
ASML Holding NV ADRASML	$537.3B	—	—	0.6%
Micron Technology IncMU	$482.8B	—	—	0.1%
Orsted A/SDOGEF	$461.5B	—	—	—
Mastercard IncMA	$454.6B	—	—	0.6%
Costco Wholesale CorpCOST	$437.8B	—	—	0.5%
Samsung Electronics Co LtdSSNLF	$428.2B	—	—	2.4%
Oracle CorporationORCL	$425.0B	—	—	1.4%
Roche Holding AGRHHBF	$394.8B	—	—	2.0%
Roche Holding AG ParticipationRHHVF	$386.9B	—	—	2.1%
Procter & Gamble CompanyPG	$383.3B	—	—	2.6%
Bank of America CorpBAC	$377.0B	—	—	2.1%
Caterpillar IncCAT	$376.9B	—	—	0.7%
The Home Depot IncHD	$373.9B	—	—	2.4%
Industrial and Commercial Bank of ChinaIDCBY	$371.6B	—	—	5.2%
Chevron CorpCVX	$369.7B	—	—	3.7%
GE AerospaceGE	$361.7B	—	—	0.4%
AbbVie IncABBV	$356.5B	—	—	3.3%
Netflix IncNFLX	$350.8B	—	—	—
China Galaxy Securities Co Ltd ADRCGXYY	$349.7B	—	—	3.4%
The Coca-Cola CompanyKO	$346.2B	—	—	2.5%
Palantir Technologies Inc.PLTR	$328.1B	—	—	—

NVIDIA CorporationNVDA · $4.8T
Reward—Risk—Yield0.0%
Apple IncAAPL · $4.3T
Reward—Risk—Yield0.4%
Alphabet Inc Class CGOOG · $3.8T
Reward—Risk—Yield0.3%
Microsoft CorporationMSFT · $3.0T
Reward—Risk—Yield0.9%
Amazon.com IncAMZN · $2.8T
Reward—Risk—
Space Exploration Technologies Corp. Class A Common StockSPCX · $2.4T
Reward—Risk—
Taiwan Semiconductor ManufacturingTSM · $1.9T
Reward—Risk—Yield0.9%
Broadcom IncAVGO · $1.9T
Reward—Risk—Yield0.6%
Meta Platforms Inc.META · $1.7T
Reward—Risk—Yield0.3%
Tesla IncTSLA · $1.5T
Reward—Risk—
Berkshire Hathaway IncBRK-B · $1.0T
Reward—Risk—
Walmart Inc. Common StockWMT · $1.0T
Reward—Risk—Yield0.8%
Eli Lilly and CompanyLLY · $970.6B
Reward—Risk—Yield0.6%
JPMorgan Chase & CoJPM · $818.0B
Reward—Risk—Yield1.9%
Exxon Mobil CorpXOM · $635.4B
Reward—Risk—Yield2.7%
Visa Inc. Class AV · $617.2B
Reward—Risk—Yield0.8%
Tencent Holdings LtdTCTZF · $595.6B
Reward—Risk—Yield6.3%
Johnson & JohnsonJNJ · $590.8B
Reward—Risk—Yield2.1%
Advanced Micro Devices IncAMD · $549.6B
Reward—Risk—
ASML Holding NV ADRASML · $537.3B
Reward—Risk—Yield0.6%
Micron Technology IncMU · $482.8B
Reward—Risk—Yield0.1%
Orsted A/SDOGEF · $461.5B
Reward—Risk—
Mastercard IncMA · $454.6B
Reward—Risk—Yield0.6%
Costco Wholesale CorpCOST · $437.8B
Reward—Risk—Yield0.5%
Samsung Electronics Co LtdSSNLF · $428.2B
Reward—Risk—Yield2.4%
Oracle CorporationORCL · $425.0B
Reward—Risk—Yield1.4%
Roche Holding AGRHHBF · $394.8B
Reward—Risk—Yield2.0%
Roche Holding AG ParticipationRHHVF · $386.9B
Reward—Risk—Yield2.1%
Procter & Gamble CompanyPG · $383.3B
Reward—Risk—Yield2.6%
Bank of America CorpBAC · $377.0B
Reward—Risk—Yield2.1%
Caterpillar IncCAT · $376.9B
Reward—Risk—Yield0.7%
The Home Depot IncHD · $373.9B
Reward—Risk—Yield2.4%
Industrial and Commercial Bank of ChinaIDCBY · $371.6B
Reward—Risk—Yield5.2%
Chevron CorpCVX · $369.7B
Reward—Risk—Yield3.7%
GE AerospaceGE · $361.7B
Reward—Risk—Yield0.4%
AbbVie IncABBV · $356.5B
Reward—Risk—Yield3.3%
Netflix IncNFLX · $350.8B
Reward—Risk—
China Galaxy Securities Co Ltd ADRCGXYY · $349.7B
Reward—Risk—Yield3.4%
The Coca-Cola CompanyKO · $346.2B
Reward—Risk—Yield2.5%
Palantir Technologies Inc.PLTR · $328.1B
Reward—Risk—

Frequently asked questions

What is the Mega Caps collection?

The world’s largest companies (US$200bn+). It currently holds 93 stocks, each rated by Openbook's Reward and Risk scores. Mega-caps are the market’s giants — companies worth $200bn or more that set the tone for entire sectors.

How are Mega Caps stocks selected?

Constituents are chosen by a rules-based screen over the full UK and US common-stock universe, then ranked by market capitalisation.

How often is the Mega Caps list updated?

It is rebuilt from live market data, so the constituents and their rankings update as prices and company fundamentals change — there is no fixed, hand-edited list.

How should I use the Reward and Risk ratings?

Openbook's Reward rating combines a stock's growth, momentum, profitability and valuation into a single 0–100 score, and the Risk rating scores financial strength, volatility and size. Use them to compare names within this theme — broadly, a higher Reward alongside a lower Risk is more attractive. They are quantitative research signals, not investment advice.

Openbook Reward and Risk ratings and factor scores are quantitative signals for research, not investment advice. Data may be delayed. Some US-listed names carry partial factor coverage.