Billionaire hedge fund manager Ken Griffin has quietly rotated out of a legacy storage name and into one of the market’s most explosive quantum computing plays. After unloading a large position in Sandisk, his firm has been building exposure to a quantum stock that has surged 1,900% since early 2023, signaling a sharp shift in where he sees the next leg of growth. For investors watching institutional money, the move offers a rare window into how one of Wall Street’s most influential traders is positioning for the next wave of computing.
Griffin’s pivot is not just a headline-grabbing trade, it is a case study in how capital is flowing from mature hardware businesses into frontier technologies. I see it as part of a broader pattern in his portfolio, where traditional tech holdings are being trimmed to make room for highly speculative, but potentially transformational, quantum names.
Why Ken Griffin walked away from Sandisk
The first part of the story is what Griffin is leaving behind. Citadel Advisors, the hedge fund he runs, has been a major player in established technology stocks, and Sandisk has long fit that mold as a familiar brand in flash memory and storage. In the third quarter, however, Citadel Advisors sold nearly 2 million shares of Sandisk, a sizable reduction that effectively signaled a loss of enthusiasm for the stock’s near term risk reward profile, according to Citadel Advisors filings. For a firm widely described as the most profitable hedge fund in history, such a decisive exit is rarely casual.
When a manager of Griffin’s stature cuts a position that aggressively, I read it as a statement about opportunity cost. Capital tied up in a mature storage company is capital that cannot chase higher growth elsewhere, and the Sandisk sale suggests he sees better upside in other corners of the market. A separate disclosure noted that billionaire Ken Griffin, identified explicitly as the person running Citadel, sold shares of Sand, underscoring that this was not a minor portfolio tweak but a deliberate reallocation away from the legacy storage space, as reflected in Sand transaction data.
The quantum stock that soared 1,900%
The destination for some of that freed up capital is far more speculative. Reporting on his latest trades shows that Billionaire Ken Griffin Sells Sandisk Stock and Buys a Quantum Stock Up 1,900% Since Early 2023, highlighting just how dramatic the run in this name has been. A gain of 1,900% in less than three years puts the stock in the rarefied company of early stage winners that have already delivered venture style returns in the public markets, a profile that would normally scare off more conservative institutional money. Yet the filings indicate that Billionaire Ken Griffin is willing to step into a story that has already multiplied many times over, which tells me he believes the addressable market and technology runway can still justify further upside, as outlined in the Quantum Stock Up narrative.
That kind of move is not isolated. Another account of the same trade emphasizes that Billionaire Ken Griffin Sells Sandisk Stock and Buys a Quantum Stock Up 1,900% Since Early 2023, framing it as a conscious rotation from a slow growth hardware player into a hyper growth quantum name. I see this as Griffin effectively paying up for momentum in a sector where technological breakthroughs can quickly reset what counts as expensive. The fact that the stock has already climbed 1,900% Since Early 2023 and still attracts fresh institutional money suggests that some of the smartest capital on Wall Street believes the quantum computing opportunity is only in its early innings, a view reinforced by the Since Early performance figures.
Griffin’s broader quantum computing bet
Zooming out from this single trade, Griffin’s interest in quantum is broader than one stock. Earlier disclosures show that Billionaire Ken Griffin Buys 2 Quantum Computing Stocks Up 3,750% and 1,770% Since 2023, a staggering pair of returns that would normally tempt a trader to take profits rather than initiate or add to positions. Instead, the filings describe how Quantum Computing Stocks Up 3,750% and 1,770% Since 2023 are still attracting his capital, and Wall Street Says They Are Headed Higher, which I interpret as a sign that both Griffin and the analysts covering these names see a long runway for commercialization and revenue growth despite the eye popping gains already booked, as detailed in the Quantum Computing Stocks analysis.
One of the most concrete examples of this strategy is his position in Ken Griffin D Wave Quantum Inc, a pure play quantum computing company. Portfolio tracking data shows that Ken Griffin acquired 253k Shares of D Wave Quantum Inc, with a Current Value of Holding of $7.37M and a position size equal to 0.01% of his Portfolio, at an Average Buy Price within a specified range. On paper, 0.01% might look trivial, but in the context of a multi billion dollar hedge fund it represents a meaningful seed sized bet on a company that is still in the early stages of commercial adoption, and it illustrates how Griffin uses small but focused allocations to gain exposure to frontier technologies, as captured in the Current Value of breakdown.
Why D-Wave and quantum annealing caught his eye
Within the quantum universe, D Wave Quantum has emerged as a particular focus. Disclosures describe how Billionaire Ken Griffin Just Bought a Quantum Computing stock that trades under the ticker associated with Wave Quantum, a company developing computing systems that use quantum annealing technology rather than the gate based approach pursued by rivals. Quantum annealing is optimized for certain classes of optimization problems, such as route planning or portfolio construction, and Wall Street is bullish on D Wave Quantum’s ability to turn that niche into a defensible business, with some analysts suggesting the stock could soar much higher from current levels, according to Wave Quantum coverage.
From my perspective, that focus on a specific hardware and algorithmic approach is telling. Griffin is not simply buying a basket of quantum themed names, he is targeting a company whose technology is already being tested in real world optimization tasks, which fits his pattern of backing platforms with clear commercial pathways. The fact that Wall Street is openly bullish on D Wave Quantum and that he has already committed millions of dollars to the stock, even as it remains a tiny slice of his overall Portfolio, suggests he views it as a long dated option on a future where quantum annealing systems sit alongside classical high performance computing in data centers and specialized industrial workflows.
What Griffin’s pivot signals for everyday investors
For individual investors, the message in these trades is not that everyone should rush into the same quantum names, but that the opportunity set in computing is shifting. When a manager like Billionaire Ken Griffin, who oversees Citadel and Citadel Advisors, sells a large block of Sandisk and reallocates into a Quantum Stock Up 1,900% Since Early 2023, it underscores how quickly the market’s definition of “core tech exposure” can change, as highlighted in the Key Points summary of his moves. I see his actions as a reminder that even the most established hardware names can become funding sources when a new paradigm, like quantum computing, starts to look commercially viable.
At the same time, the scale and structure of his bets matter. Positions like the 0.01% stake in D Wave Quantum Inc, with a Current Value of Holding of $7.37M, show that Griffin is sizing these trades as high risk, high reward options rather than core holdings, a nuance that retail investors sometimes overlook when they chase the same tickers. The fact that he is spreading his exposure across multiple Quantum Computing Stocks Up 3,750% and 1,770% Since 2023, while trimming legacy names such as Sandisk, suggests a barbell approach that pairs speculative frontier tech with a broader base of diversified positions, a framework that can help everyday investors think more clearly about how, or whether, to follow him into the quantum space.
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*This article was researched with the help of AI, with human editors creating the final content.
Grant Mercer covers market dynamics, business trends, and the economic forces driving growth across industries. His analysis connects macro movements with real-world implications for investors, entrepreneurs, and professionals. Through his work at The Daily Overview, Grant helps readers understand how markets function and where opportunities may emerge.
