Quantum computing stocks are entering a critical period in May 2026, with four key players set to report earnings within a span of just a few days. IonQ, Rigetti Computing, D-Wave Quantum, and Quantum Computing Inc. will each release first-quarter results, offering investors a rapid-fire look at revenue, bookings, and cash positions. The reports come as the sector grapples with increasing competition from new IPOs and SPAC deals.
Earnings Calendar and Market Context
IonQ will report after the market close on May 6, followed by Rigetti on May 11, also after the bell. D-Wave is scheduled to announce before the market opens on May 12. This condensed schedule leaves little room for pause, especially as the sector heads into a series of investor conferences. Shares of IonQ last traded at $43.08, Rigetti at $16.39, D-Wave at $18.11, and Quantum Computing Inc. at $8.57. All four companies have negative price-to-earnings ratios, indicating that investors are pricing them on anticipated growth rather than current earnings.
IonQ: Largest Revenue Among Pure-Play Quantum Firms
IonQ stands out with the largest revenue in the group. In February, the company reported 2025 revenue of $130.0 million, up 202% year-over-year, and ended the year with $3.3 billion in cash, cash equivalents, and investments. For 2026, IonQ projects revenue of $235 million at the midpoint of its guidance. Commercial customers accounted for over 60% of 2025 revenue, according to CFO and COO Inder Singh. On Monday, IonQ and Florida LambdaRail announced a deal to build a quantum-safe network across Florida, using quantum key distribution (QKD) to detect eavesdropping. CEO Niccolo de Masi called the project "another major milestone."
Rigetti Computing: Hardware Milestone with 108-Qubit System
Rigetti has taken a hardware-first approach. Earlier this month, the company announced general availability of its 108-qubit Cepheus-1-108Q system on both Rigetti Quantum Cloud Services and Amazon Braket. The system achieved a median two-qubit gate fidelity of 99.1%, with gates running in approximately 60 nanoseconds. CEO Subodh Kulkarni described the rollout as a "milestone that validates" Rigetti's scaling strategy.
D-Wave Quantum: Focus on Annealing and Bookings
D-Wave has sharpened its focus on annealing technology, which is geared toward optimization tasks, while also developing gate-model machines. The company reported 2025 revenue of $24.6 million, up 179%, with bookings climbing past $32.8 million after year-end. Bookings, which represent incoming customer orders rather than recognized revenue, are expected to convert down the line. D-Wave finished 2025 with a record $884.5 million in cash and securities. Management plans to appear at six investor conferences between May 14 and June 10.
Quantum Computing Inc.: Photonic AI Hardware
Quantum Computing Inc. brings a photonics twist to the group, though it is the smaller player. On April 23, the company announced NeuraWave, a photonic reservoir computing platform designed for real-time AI inference at the edge. The platform is now deployment-ready and open for customer orders. CTO Yong Meng Sua described the release as taking photonic computing "out of the laboratory."
Broader Market Pressures and Competition
The quantum computing landscape is becoming more crowded. Honeywell revealed on April 22 that Quantinuum, which it mostly owns, filed a draft S-1 for an IPO with the SEC on February 17. If Quantinuum lists, the public will gain another quantum stock to track. Additionally, three other quantum computing firms have hit public markets in recent months, with another five signaling they will list later this year. This influx is ramping up competition for a thin set of pure-play quantum stocks.
Despite the excitement, the sector faces significant challenges. According to Reuters Breakingviews, quantum hardware is inching closer to practical application, but the underlying business case remains unclear. IonQ, D-Wave, Rigetti, and Xanadu collectively burned through about $500 million in operating cash over their most recent financial years. Qubits—the quantum information units capable of holding multiple states—are still delicate and error-prone. While IBM and Google (via Alphabet) continue advancing the technology, the hurdles are stubborn.
Outlook: Growth Prospects Are Lopsided
Growth prospects among the four companies are uneven. IonQ brings scale plus a security-network angle; Rigetti hit a 108-qubit milestone; D-Wave touts bookings and a commercial focus on annealing; and Quantum Computing Inc. pushes photonic AI hardware. The risk is straightforward: unless May numbers show real revenue, quantum stocks could still behave like venture punts, not stable operators. Investors will be watching closely as the earnings reports roll in.
