Rigetti CEO Admits Quantum Can't Prove ROI Yet; Quantum Stocks Slide

Rigetti Computing (NASDAQ: RGTI) fell 5% to $10.57 in Thursday afternoon trading after its CEO, Subodh Kulkarni, admitted on the November 10 earnings call that quantum computing cannot yet demonstrate a return on investment over classical machines. The remark hit the whole sector. IonQ (NYSE: IONQ) dropped 8% to $31.36. D-Wave Quantum (NYSE: QBTS) slid 5% to $10.16. Quantum Computing Inc. (NASDAQ: QUBT) fell 5% to $5.86.

Kulkarni's words were unusually blunt for a sector that trades heavily on promises. "None of us are at a point where we can demonstrate ROI with quantum computing over classical computing," he said. He added that quantum computing remains "still very much in the R&D phase," and that data center managers are unlikely to make significant commercial investments until quantum can show that return over classical systems.

That matters because quantum stocks have run on timelines, not revenue. When the CEO of a publicly traded quantum company pushes the payoff horizon out, investors reprice the entire group. Kulkarni estimated his company is "roughly about three years from that point," tied to a target of 1,000 physical qubits at 99.9% fidelity or higher.

What went wrong in Rigetti's Q3 numbers?

The stock slide started before Thursday's comments. Rigetti reported Q3 2026 results on November 10, and the numbers missed badly.

• Quarterly revenue: $1.41 million, versus a $3.52 million consensus estimate
• Revenue decline: 27.5% year over year
• Operating loss: $33.19 million, widened from $20.55 million a year earlier
• Full-year 2026 revenue outlook: maintained at approximately $20 million

That full-year figure depends on customer acceptance of Rigetti's C-DAC system in Q4 2026. Near-term sales may stay modest regardless, because Rigetti's current buyers are mostly national labs, universities and research teams rather than commercial customers. Deliveries of a small number of systems drive the company's sales, which keeps quarterly revenue uneven and research-driven.

Kulkarni's three-year timeline extends well past the horizon most growth-stock buyers accept. A company burning $33 million a quarter against $1.41 million of revenue needs patient capital, and patience is exactly what the macro environment is withdrawing.

How big a role are interest rates playing?

Macro data is the second weight on Rigetti, alongside the CEO's admission. The Consumer Price Index report released on November 10 showed October prices up 0.4%, above the 0.3% economists expected. Inflation that hot pushed the 10-year Treasury yield toward 5%.

Higher yields weigh hardest on companies whose earnings sit years away, and Rigetti sits at the far end of that spectrum. If commercial revenue is three years out, discount rates near 5% on long-duration Treasuries make distant cash flows worth less today. That logic applies across the sector, including to the companies with the biggest revenue bases.

Why did IonQ fall hardest despite huge growth?

IonQ's 8% drop was the steepest among the three featured quantum names, and its fundamentals don't obviously explain it. IonQ reported Q3 revenue of $173.8 million, up 336% year over year. It is the group's revenue leader by a wide margin.

A slide that sharp at the strongest performer points to rates and risk appetite as the bigger forces at work, not company-specific results. When even the sector's growth leader sells off after a peer's cautious commentary, the market is repricing the whole category rather than punishing one balance sheet.

D-Wave tells a similar story. Its sales grew 20.7% year over year in Q3, yet the stock still fell 5% to $10.16. Under the hood, quarterly bookings dropped 19%, and gross margin slipped to 52.9% from 71.4% as lower-margin professional services made up more of the revenue mix. D-Wave sells annealing systems that customers already run in production, making it arguably the most commercially mature of the group, and even it couldn't hold its price.

Quantum Computing Inc. rounds out the pure-plays, down 5% to $5.86. Rigetti, IonQ and D-Wave all moving in the same direction fits a sector-wide repricing more closely than any single company's results.

How do these companies' business models differ?

The four names in this selloff approach quantum computing from different angles, which matters for judging how long each can survive the R&D phase Kulkarni described.

• Rigetti builds superconducting, chiplet-based machines and sells them on premises to national labs and universities, while also offering access through its own cloud service.
• IonQ runs a wider platform covering trapped-ion computers, networking, sensing, security software and a chip foundry, giving it several revenue streams outside quantum computing itself. NVIDIA (NASDAQ: NVDA) plans to install an IonQ Superion 256 system at its Accelerated Quantum Research Center.
• D-Wave sells annealing systems already running in customer production environments and is developing gate-model machines alongside them.
• Quantum Computing Inc. builds photonic quantum systems that run at room temperature, paired with chip-packaging operations.

IonQ's breadth and D-Wave's production deployments give both companies cushions Rigetti lacks. Rigetti's revenue still depends on a handful of institutional deliveries per quarter, which is why a missed quarter moves its top line by millions rather than rounding errors.

Can Rigetti still hit its 2026 outlook?

The immediate test is the C-DAC system. Rigetti needs customer acceptance in Q4 2026 to support its approximately $20 million full-year revenue outlook. Without that acceptance, the guide collapses, and the stock's Thursday level may look generous.

The balance sheet offers real protection. Rigetti ended Q3 with $497.1 million in cash, cash equivalents and available-for-sale investments, and no debt. At a $33 million quarterly operating loss, that runway covers roughly three and a half years, almost exactly matching Kulkarni's timeline to a provable ROI.

The company also has a definitive $100 million agreement with the U.S. Department of Commerce, which could accelerate its hardware road map. Government backing has become a critical funding channel for quantum firms whose commercial revenue can't yet cover their research spending, and that agreement anchors Rigetti's position with one of its core customer types.

The bear case is straightforward. The operating loss is widening, the CEO himself expects commercial sales to stay limited until quantum advantage arrives, and higher Treasury yields could keep pressure on every quantum name. The bulls counter with the cash pile, the Commerce Department deal and the 1,000-qubit, 99.9%-fidelity target that Kulkarni says puts ROI roughly three years out.

Investors should stay cautious with RGTI and other quantum-computing stocks, which can move quickly in either direction. The next hard data point arrives when C-DAC customer acceptance does, or doesn't, land in Q4 2026.