A Once-in-a-Generation Investment Opportunity: Is IonQ the Top Quantum Computing Stock to Buy Now?
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By Keithen Drury – Mar 10, 2026 at 10:00AM ESTKey PointsIonQ is both selling systems and engaging in research partnerships.Quantum computing could be a $72 billion annual market by 2035. Quantum computing may seem like a far-off technology, but it's becoming more real by the day. This could be the next great tech investment race, which could lead to massive returns for investors who are early to the party. One of the top stocks to buy in this sector is IonQ (IONQ +1.98%), and it just posted an incredible quarter. But is it worth buying now? Or should investors be patient? Image source: Getty Images. IonQ is seeing big growth Commercially viable quantum computing isn't available today. The reality is that today's quantum computers still make too many mistakes to make them applicable in many areas. However, they are rapidly improving, and there are several industries looking to do advanced research in quantum so they can maximize the technology once it's available. These early-model quantum computers and research contracts are what give IonQ the funds to continue running the company and push the limits of what's possible with quantum computing. In Q4, its revenue rose 429% year over year to nearly $62 million. During the quarter, it announced the sale of a 100-qubit system as well as an expanded partnership that will span four more years. It also announced an acquisition of SkyWater Technology, which bolsters its manufacturing capabilities for when it's time to mass-produce quantum computing equipment. IonQ is the clear leader in the quantum computing pure-play sector of the market, and its results back it up. For 2026, the company expects to achieve revenue of $235 million. That's pretty high revenue for a company that's still working on improving its technology before it can be widely deployed. ExpandNYSE: IONQIonQToday's Change(1.98%) $0.71Current Price$36.58Key Data PointsMarket Cap$13BDay's Range$35.39 - $36.9252wk Range$17.88 - $84.64Volume368KAvg Vol21MGross Margin-2267.11% Still, there is a lot of risk with IonQ. Major tech companies with nearly unlimited resources are competing in the quantum realm, and IonQ's approach to quantum computing may not pan out. Still, I think there is enough proof in the current results to have more confidence in IonQ's solution succeeding. By 2035, McKinsey & Company believes the annual quantum computing market could be worth up to $72 billion. That's a massive opportunity, and IonQ is one of the favorites to capture a large chunk of that market. I think this is a true once-in-a-generation investment opportunity, as quantum computing will unlock new capabilities previously thought impossible. Because there's a higher risk associated with IonQ's stock, I wouldn't suggest investing more than 1% of your portfolio's value here. If IonQ flops, that 1% positioning won't affect your portfolio too much. But if IonQ soars, that small amount can still produce life-changing returns.Read NextMar 4, 2026 •By Robert Izquierdo2 Quantum Computing Stocks That Could Help Make You a FortuneMar 1, 2026 •By Geoffrey SeilerIs IonQ Stock a Buy as Revenue Growth Explodes Higher?Feb 28, 2026 •By Will HealyCould Buying IonQ Stock Today Set You Up for Life?Feb 28, 2026 •By Rick OrfordThis Tiny Quantum Stock Could Surge 200%Feb 27, 2026 •By Johnny RiceBlackRock Owns 24.3 Million Shares of IonQ. Here's What That Really Tells You About Quantum Computing Stocks.Feb 26, 2026 •By Joe TenebrusoWhy IonQ Stock Surged TodayAbout the AuthorKeithen Drury is a contributing Motley Fool technology analyst covering AI, semiconductors, cybersecurity, and SaaS stocks. In addition to The Motley Fool, Keithen is a mechanical engineer and has held roles at Honeywell and smaller industrial companies like Brand Hydraulics and Lincoln Industries. He holds a bachelor’s degree in mechanical engineering from Dordt University.TMFTripleOptionStocks MentionedIonQNYSE: IONQ$36.58(+1.98%)+$0.71*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.