The One Number IonQ Stock Investors Should Watch
One figure stands out at IonQ (IONQ): the backlog of signed orders that the company has yet to deliver. While many investors still view quantum computing as a laboratory experiment, actual customers are signing contracts. Despite this commercial progress, the stock fell 48% over the past year, significantly underperforming the S&P 500, which returned 17.1%. That disconnect highlights the central contradiction facing the company. So, how big is IonQ’s order book?
IonQ Had $485 Million Of Orders Still To Deliver
IonQ ended the second quarter of 2026 with $485 million in signed, undelivered work, representing a steep increase from $122 million a year earlier. Management detailed these figures during its August 5, 2026 earnings call.
The company is already putting hardware in the field. During the quarter, IonQ began shipping system components to KISTI, a research institute in South Korea. It was also handling the final assembly of a fifth-generation computer for QuantumBasel in Switzerland, an existing customer that had previously purchased an older IonQ machine. Management cited the deployments of these fifth-generation systems as the largest reason revenue beat its own expectations.
New contracts have closely followed those installations. On September 24, 2026, IonQ announced a contract to deliver a Superion 256 quantum computer to Florida International University. Shortly after, on October 7, the company announced it had signed an agreement with DARPA, the U.S. defense research agency, carrying a potential value of up to $300 million.
Why Does IonQ’s Order Book Matter Now?
The primary concern surrounding IonQ is a massive gap between spending and sales. Over the last twelve months, the company posted an operating loss of about $1.0 billion against roughly $0.2 billion of revenue. Even after the recent share price decline, the stock still trades at 61.7 times sales. By comparison, the S&P 500 trades at 3.1.
Signed orders provide the clearest evidence that future sales are materializing. On the August call, management raised its 2026 revenue forecast for IonQ to a range of $280 million to $290 million. Notably, that projection excludes SkyWater, the chip foundry IonQ acquired for $1.8 billion.
Yet a robust order book does not guarantee profitability, and the margins on IonQ’s actual sales are contracting. Over the last twelve months, gross margin fell to 29%, down from 54% a year earlier. Consequently, the company now retains less of each dollar of sales than it did previously, even as its sales have grown.
What Could Go Wrong For IonQ’s Orders?
An order translates into revenue only upon delivery, and some of IonQ’s newest orders involve a machine that is not yet in service. Both the Florida contract and a September 21 agreement with the South Korean company SDT specifically require the Superion 256, an advanced 256-qubit machine. On the August call, management indicated it planned to begin putting its 256-qubit systems into service in 2027.
The DARPA contract faces its own contingencies. The stated amount of up to $300 million represents a ceiling rather than a guarantee, and any funding beyond an initial amount depends on future government budgets.
Customers are ordering these machines, but because revenue recognizes upon delivery, the financial impact of those Superion 256 agreements will not materialize until 2027 and beyond. If IonQ standalone core business reports 2026 revenue below $280 million, the low end of management’s range, it would indicate the company is delivering on its orders more slowly than planned.
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