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Buffett owns two quantum computing stocks — Alphabet and Amazon.
Both companies focus on much more than just quantum computing, of course.
Alphabet and Amazon are good picks for other investors, too.
10 stocks we like better than Amazon ›
Nobel Prize-winning theoretical physicist Richard Feynman once stated, “No one understands quantum mechanics.” I mention Feynman’s quote because many investors are excited about quantum computing stocks these days – and quantum computing is based on the principles of (you probably guessed it) quantum mechanics.
That leads me to another quote, in this case a statement made by Warren Buffett: “Never invest in a business you cannot understand.” Buffett has also written about only investing in companies within your “circle of competence.”
With all of this in mind, you might think that Buffett wouldn’t touch a quantum computing stock with a 10-foot pole. However, $7.7 billion of his Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) portfolio is invested in two quantum computing stocks.
Has Buffett quietly bought shares of D-Wave Quantum (NYSE: QBTS), IonQ (NYSE: IONQ), or Rigetti Computing (NASDAQ: RGTI)? Nope. I doubt that he’d give any of these up-and-coming quantum computing stocks a second of his attention. However, the legendary investor has acquired shares in two other companies that are investing heavily in quantum computing.
In 2019, Berkshire initiated a new position in Amazon (NASDAQ: AMZN). Buffett later acknowledged that one of the conglomerate’s two investment managers decided to buy Amazon. But Buffett also admitted that he had been “an idiot” for not investing in the company earlier.
Amazon is a bigger player in quantum computing than you might think. Amazon Web Services (AWS) offers Amazon Braket, a cloud service that allows researchers to test quantum computing algorithms, test quantum hardware, and develop quantum software. Amazon also introduced its Ocelot quantum computing chip earlier this year. Ocelet supports quantum error reduction by up to 90%.
Buffett has also expressed regret for not investing in Google’s parent company, Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL), earlier. He corrected that mistake in 2025. Berkshire bought over 17.8 million shares of the tech giant.
Alphabet’s Google Quantum AI is another pioneer in the field of quantum computing. In 2019, the unit developed a quantum system that performed a calculation in 200 seconds that it said “would have taken the best-known algorithms in the most powerful supercomputers at the time 10,000 years to accomplish.” Google Quantum AI also demonstrated the first logical qubit prototype in 2023.
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