7 most valuable mega-cap stocks

The most valuable companies in the world have grown to impressive heights in recent years, with seven publicly traded companies trading at market capitalizations of roughly $1 trillion or more. All but one of the companies come from the tech sector, with many offering products and services that consumers use every day. Several of them also made it onto Bankrate’s list of top-performing stocks.

The top spot has gone back and forth between Microsoft, Apple and Nvidia in recent months, behind a business boom driven by demand for artificial intelligence (AI). Nvidia first joined the $1 trillion club in May 2023 and since then has added more than $1 trillion in additional market value.

Warren Buffett’s Berkshire Hathaway joined the trillion-dollar ranks in August 2024 and is the only non-tech company on the list. Tesla, Broadcom and Taiwan Semiconductor have all topped $1 trillion in market capitalization at one point, but a recent stock market sell-off brought their values back below that mark.

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A company’s market capitalization is equal to the total value of its outstanding shares. Market cap can be calculated by multiplying a company’s stock price by its shares outstanding. For example, a $10 stock with 1 billion shares outstanding would have a market cap of $10 billion.

Market cap is used to measure what a company is worth at a given time.

Here are the largest publicly traded companies and members of the trillion-dollar club.

*Market cap data as of April 9, 2025.

Microsoft is best known for its suite of software offerings, including Microsoft Office. The company generated $245 billion in sales during its 2024 fiscal year. Microsoft also owns the Xbox gaming system and closed its $69 billion acquisition of video game maker Activision Blizzard in October 2023. The tech titan is also the largest backer of ChatGPT-owner OpenAI.

Apple designs and makes a variety of consumer tech products and has one of the best-known brands in the world. Apple generated more than $201 billion in iPhone sales during its fiscal 2024, and total sales reached $391 billion. Warren Buffett’s Berkshire Hathaway is one of the company’s largest shareholders and Buffett has repeatedly praised the tech giant’s business, though he slashed Berkshire’s stake in 2024.

Semiconductor company Nvidia crossed the trillion-dollar mark in May 2023, and quickly climbed to the top spot as investors bid up its shares in anticipation of a sustained boom in AI. Nvidia designs advanced chips that are used in AI systems and its shares jumped over 170 percent in 2024. The company generated more than $130 billion in revenue during its fiscal 2025.

Amazon is the largest online retailer in the world and has also built a sizable cloud business in Amazon Web Services. Amazon generated total sales of roughly $638 billion in 2024, including more than $107 billion from AWS. Amazon co-founder Jeff Bezos was the second-richest person in the world as of April 2025, according to Bloomberg.

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Alphabet is the parent company of search giant Google and generates the majority of its more than $350 billion in revenue from online advertising. Google also has a cloud business, owns YouTube and has a variety of other ventures it classifies as “other bets.”

Social media giant Meta Platforms rejoined the trillion-dollar club in January 2024, but it’s no stranger to the list. Meta previously hit a $1 trillion market cap back in 2021, when it was still known as Facebook. Meta generated about $165 billion in total revenue in 2024 and its stock jumped more than 60 percent that same year. In addition to being the parent company of Facebook, Meta also owns Instagram and WhatsApp, and is one of several tech giants betting big on artificial intelligence.

Berkshire Hathaway is the conglomerate run by legendary investor Warren Buffett. The company has interests in a wide array of industries including insurance, railroads, retailing and manufacturing. Berkshire’s investment portfolio includes stakes in companies such as Apple, Coca-Cola (KO), American Express (AXP) and Chevron (CVX).

Editorial Disclaimer: All investors are advised to conduct their own independent research into investment strategies before making an investment decision. In addition, investors are advised that past investment product performance is no guarantee of future price appreciation.

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