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Billionaire Ken Fisher’s Latest Portfolio: 5 Best AI Stocks to Buy

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In this article, we will discuss Billionaire Ken Fisher’s Latest Portfolio: 5 Best AI Stocks to Buy. Please visit Billionaire Ken Fisher’s Latest Portfolio: 10 Best AI Stocks to Buy, if you would like to see the extended list and the methodology behind it.

Ken Fisher of Fisher Asset Management

5. Amazon.com Inc (NASDAQ:AMZN)

Billionaire Ken Fisher’s Stake: $7.75 billion

AWS remains the biggest long-term growth catalyst for Amazon.com Inc (NASDAQ:AMZN)  because it holds roughly 30–32% share of the global cloud infrastructure market, maintaining its position as the largest provider ahead of Microsoft Azure and Google Cloud. AMZN ranks fifth in our list of the best AI stocks to buy according to Billionaire Ken Fisher.

But how does AWS benefit from the rise of AI usage around the world? Businesses often prefer AWS because of its scale, reliability and long operating history, while the AWS segment typically generates operating margins estimated at around 30%, significantly higher than traditional retail margins. AWS also benefits from high switching costs and long-term contracts, as migrating enterprise systems can cost millions and take years, helping maintain stable recurring revenue.

AWS also has another moat: its ecosystem of services. Unlike Microsoft Azure and Google Cloud, AWS offers 240+ cloud services, allowing companies to build, train and deploy AI models, store data, run applications and manage cybersecurity within one platform, increasing switching costs and strengthening customer lock-in over time.

E-commerce and ads are strong growth fundamental catalysts for the stock. Amazon.com Inc (NASDAQ:AMZN) controls roughly 40% of U.S. e-commerce, which gives the company access to consumer purchase data. This creates a goldmine for advertisers to target users, and Amazon.com Inc (NASDAQ:AMZN) is tapping into that opportunity. Amazon’s ad segment has been growing around 20% annually in recent years and already generates tens of billions in yearly revenue, making it one of the largest digital advertising platforms behind Google and Meta.

TCW Relative Value Large Cap Fund stated the following regarding Amazon.com, Inc. (NASDAQ:AMZN) in its fourth quarter 2025 investor letter:

“Amazon.com, Inc. (NASDAQ:AMZN) is a $2.3 trillion internet company headquartered in Seattle, WA. Amazon.com is an online retailer that also offers personalized shopping services, web-based credit card payment, and direct shipping to customers. AMZN is the largest e-commerce platform in the US with a ~40% market share. Amazon’s secret sauce is their logistics infrastructure that allows for superior delivery times and lower costs than peers, which they use to delight their loyal Prime membership base. Amazon also operates a cloud platform offering services globally through Amazon Web Services (AWS), a fantastic second business with growth opportunities in cloud migrations and AI workloads. Advertising is increasingly important to the overall business with nearly $70 billion of annualized revenues, driven by Sponsored Listings as well as Fire TV/Prime Video ad inventory (e.g., during Thursday NFL games). At initiation in October 2025, shares of AMZN met two of the five valuation factors (price-to-sales; price to-cash flow).

The investment catalyst is new products/markets. AWS has been less impacted by the wave of AI spending than its hyperscale peers as they have top heavy clients that are particularly driving growth (i.e., OpenAI for MSFT† Azure). However, it is set to close the gap as corporates and start-ups begin to scale their inference workloads as they introduce AI-powered products. Additionally, AWS is supply constrained but is set to get significantly more capacity in the next 6-12 months, both from third party providers like NVDA as well as their own custom-designed silicon (Trainium 2). On the retail side, the company is demonstrating operational excellence with consistent improvements in its cost to serve. We expect this to continue and receive a mix benefit as advertising continues to grow as a percent of its North America and International segments. As Amazon leadership execute these strategic initiatives, the company can grow cash flow and earnings materially over the medium term.”

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The $250 Trillion AI Hype is Real. A few years from now, you’ll probably wish you’d bought this stock.

When Jeff Bezos said that one breakthrough technology would shape Amazon’s destiny, even Wall Street’s biggest analysts were caught off guard.

Fast forward a year and Amazon’s new CEO Andy Jassy described generative AI as a “once-in-a-lifetime” technology that is already being used across Amazon to reinvent customer experiences.

At the 8th Future Investment Initiative conference, Elon Musk predicted that by 2040 there would be at least 10 billion humanoid robots, with each priced between $20,000 and $25,000.

Do the math. According to Musk, this technology could be worth $250 trillion by 2040.

Put another way, that’s roughly equal to:

  • 175 Teslas
  • 107 Amazons
  • 140 Metas
  • 84 Googles
  • 65 Microsofts
  • And 55 Nvidias

And here’s the wild part — this $250 trillion wave isn’t tied to one company, but to an entire ecosystem of AI innovators set to reshape the global economy.

It’s a leap so massive, it could reshape how businesses, governments, and consumers operate worldwide.

Even if that $250 trillion figure sounds ambitious, major firms like PwC and McKinsey still see AI unlocking multi-trillion-dollar potential.

How could anything be worth that much?

The answer lies in a breakthrough so powerful it’s redefining how humanity works, learns, and creates.

And this breakthrough has already set off a frenzy among hedge funds and Wall Street’s top investors.

What most investors don’t realize is that one under-owned company holds the key to this $250 trillion revolution.

In fact, Verge argues this company’s supercheap AI technology should concern rivals.

Before I reveal the details, let’s talk about how some of the richest people on the planet are positioning themselves.

  • Bill Gates sees artificial intelligence as the “biggest technological advance in my lifetime,” more transformative than the internet or personal computer, capable of improving healthcare, education, and addressing climate change.
  • Larry Ellison — through Oracle, is spending billions on Nvidia chips and partnering with Cohere to embed generative AI across Oracle’s cloud and apps.
  • Warren Buffett — not known for tech hype — says this breakthrough could have a ‘hugely beneficial social impact.

When billionaires from Silicon Valley to Wall Street line up behind the same idea — you know it’s worth paying attention to.

Even as we admire what Tesla, Nvidia, Alphabet, and Microsoft have built, we believe an even greater opportunity lies elsewhere…

But the real story isn’t Nvidia — it’s a much smaller company quietly improving the critical technology that makes this entire revolution possible.

And judging by what I’m hearing from both Silicon Valley insiders and Wall Street veterans…

This prediction might not be bold at all:

A few years from now, you’ll wish you’d owned this stock.

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