NEW YORK, June 4, 2026, 15:03 (EDT)
- IonQ traded down 1.4% at $67.26, with about 30.9 million shares changing hands; the SPDR S&P 500 ETF, an exchange-traded fund that tracks the S&P 500, was up 0.5%.
- Quantinuum opened at $68 in its Nasdaq debut, above its $60 initial public offering price, valuing the Honeywell-backed quantum company at $17.63 billion.
- U.S. markets were open for regular trading; the NYSE core session runs from 9:30 a.m. to 4:00 p.m. ET, and June 4 is not on the exchange’s 2026 holiday list.
IonQ shares fell on Thursday as Quantinuum’s strong Nasdaq debut gave investors a new yardstick for valuing quantum-computing stocks, an early-stage corner of technology that has drawn big money but still has to prove broad commercial demand.
The move mattered because Quantinuum’s initial public offering, or IPO — a company’s first sale of shares to public investors — put a public price on one of IonQ’s closest high-profile rivals. IonQ, at just under $25 billion in market value, still trades above Quantinuum’s debut valuation, even after Thursday’s decline.
Quantum computing uses quantum bits, or qubits, rather than ordinary computer bits, with the aim of handling certain complex calculations faster than conventional machines. The pitch runs through artificial intelligence, communications, cybersecurity and national security. The hard part is turning lab progress into steady revenue.
“The investment case is centered on the long-term potential of quantum computing and its potential role in future computing infrastructure,” IPOX Schuster analyst Kat Liu told Reuters. She added that government support was “meaningful” because quantum is increasingly seen as strategic technology tied to security, AI, communications and advanced computing. Reuters
IonQ was last at $67.26, down 97 cents, after trading between $63.65 and $69.45 during the session. The stock’s move lagged the broader market, with the SPDR S&P 500 ETF higher in afternoon trade.
The peer move was not one-way. Rigetti Computing rose 2.0% and D-Wave Quantum gained 2.7%, suggesting investors were sorting through quantum names rather than selling the whole group. Quantinuum’s debut still adds a cleaner comparison for IonQ, which has long been one of the more closely watched stand-alone names in the sector.
IonQ’s own story has improved this year. The company reported first-quarter revenue of $64.7 million, up 755% from a year earlier, and raised its 2026 revenue outlook to $260 million to $270 million. Chief Executive Niccolo de Masi called it the “biggest quarter” in the company’s history and said IonQ was raising expectations because of demand for its quantum computers and broader platform. IonQ
The company also said it had $3.1 billion in cash, cash equivalents and investments as of March 31. But it reported an adjusted EBITDA loss of $96.8 million in the quarter; adjusted EBITDA strips out items such as interest, taxes, depreciation, amortization and some stock-based or transaction costs, so it is not the same as standard accounting profit.
IonQ’s pending $1.8 billion deal for SkyWater Technology remains part of the bull case. The acquisition would bring chip manufacturing closer to IonQ’s own control and is expected to close in the second or third quarter of 2026, subject to approvals and other conditions. SkyWater shareholders are set to receive $15 in cash and $20 in IonQ stock for each share.
But the risk is plain. Commercial adoption remains limited across quantum computing, and development costs are high; Reuters reported that Japan’s RIKEN research institute accounted for roughly 60% of Quantinuum’s 2025 revenue, a reminder of how concentrated demand can be in the sector. For IonQ, any delay in large customer orders, government work or the SkyWater closing could put pressure on a stock priced for fast execution.
IonQ reaffirmed a full-year adjusted EBITDA loss forecast of $310 million to $330 million, even as it lifted revenue guidance. That mix — faster top-line growth but heavy spending — leaves the stock sensitive to fresh proof that quantum systems are moving beyond pilots and research budgets.
The next checks arrive quickly. IonQ is scheduled to appear at the Mizuho 2026 Global Technology Conference on June 9 and the Rosenblatt 2026 Annual Technology Summit on June 10, giving investors another chance to press management on orders, margins, the SkyWater deal and how the company sees Quantinuum’s new public-market benchmark.
