Quantum computing is the most speculative corner of public tech markets right now, and September 2026 offers a fresh chance to size up the three US-listed pure-plays that dominate the conversation. All three trade at nosebleed multiples relative to revenue, all three post enormous operating losses, and all three have delivered violent multi-hundred-percent swings in either direction over the past year. This is a category for risk-tolerant investors willing to underwrite pre-commercial technology in exchange for optionality on a computing paradigm shift.
Sentiment has cooled from last autumn’s mania, but the fundamental story is arguably stronger. Backlogs are exploding, government contracts are landing, and hardware roadmaps are advancing in months instead of years. Here is where the three leading names stand heading into September, with the bull case, one verified data point, and one risk for each.
IonQ (IONQ): The Vertically Integrated Bet
IonQ (NYSE:IONQ | IONQ Price Prediction) is the largest quantum pure-play by market cap, sitting at roughly $17 billion after closing at $42.05 on August 25. The stock has ripped 28.05% over the past month but remains down 6.28% year to date, illustrating why this is a name for investors who can stomach whipsaw action.
The bull case tightened materially in August. Q2 revenue hit $80.05 million, up 286.83% year over year, and management raised full-year 2026 guidance to $280 million to $290 million. Remaining performance obligations grew 297% year over year. CEO Niccolo de Masi called it "the fifth consecutive quarter of record results and the strongest quarter in our company’s history." The closed SkyWater acquisition makes IonQ, in management’s own words, "the only vertically integrated, full-stack quantum platform and the largest merchant supplier to the US and allied quantum ecosystem." Analyst consensus is 85% bullish with a $67.68 target price.
The risk is the GAAP picture. Q2 net income was -$1.87 billion, distorted by $1.6 billion in warrant-liability fair-value changes and $141.8 million in stock-based compensation. Beta sits at 3.3. Any speed bump in the SkyWater integration or the 256-qubit roadmap gets punished hard.
Rigetti Computing (RGTI): The Superconducting Wildcard
Rigetti Computing (NASDAQ:RGTI) is the smallest of the three by revenue, but the balance sheet is arguably the cleanest. Shares closed at $16.94 on August 25, up 19.72% over one month yet still down 23.52% year to date. The 52-week range of $12.53 to $58.15 tells you everything about the volatility profile.
The bull case is strategic. Rigetti has a letter of intent with the U.S. Department of Commerce for up to $100 million in potential CHIPS Act funding over three years, sits on $541.29 million in cash and investments with no debt, and posted Q2 revenue of $5.14 million, up 185.29% year over year. CEO Subodh Kulkarni pointed to Rigetti’s "open modular approach, superconducting gate-based architecture, and chiplet-based scaling strategy" as competitive differentiators. The consensus model flags 101.53% upside to a base-case price of $34.14.
The risk is scale. R&D burn was $20.73 million in Q2 against tiny revenue, and Rigetti remains heavily dependent on government and academic orders. The Commerce Department funding, if consummated, likely brings dilution. Retail sentiment on Reddit is described as "Bearish retail sentiment."
D-Wave Quantum (QBTS): The Only Commercial Annealer
D-Wave Quantum (NYSE:QBTS) closed at $19.35 on August 25, up 28.83% over one year but down 26% year to date. It carries the most bullish analyst posture of the trio, with a 94% bullish sentiment split and a $35.24 analyst target.
The bull case is commercial traction ahead of reported revenue. Q2 revenue was $3.076 million, down 0.61% year over year, missing consensus, yet first-half 2026 bookings surged to $35.50 million from $2.90 million, and remaining performance obligations grew 668% year over year to $40.70 million. Commercial customers now represent 62.4% of Q2 revenue, up from 45.1%. New engagements with AT&T, Nasdaq Verafin, Oki Electric, Shionogi, and Unisys broaden the customer base. CEO Alan Baratz stated that "D-Wave is translating technical leadership into commercial progress."
The risk is the disconnect between bookings and recognized revenue. Adjusted EBITDA loss widened 85% to $37.1 million, cash and investment securities fell to $546.2 million from $819.3 million, and the gate-model roadmap does not target 100 logical qubits until 2032. Beta is 2.16.
Positioning Into September
These three stocks share the same speculative DNA: negative forward EPS, warrant-driven GAAP volatility, and roadmaps that stretch years into the future. IonQ offers scale and a vertically integrated moat. Rigetti offers a clean balance sheet and CHIPS Act optionality. D-Wave offers the only commercially deployed annealing business and rapidly accelerating bookings. What happens next depends on execution. If the roadmaps hit, the upside cases the models flag look plausible. If they slip, the drawdowns will be brutal. The risk/reward asymmetry is stark, which is exactly why a name like this belongs inside a fenced-off speculation sleeve with real position-sizing rules (we wrote a free playbook on speculating with just 5% of a portfolio that spells out the sizing and the exit discipline).
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