Quantinuum reported Q2 2026 revenue of $8 million, up 279% year-over-year from $2 million in Q2 2025, in its first quarterly report since going public earlier in 2026. The company issued its first formal full-year guidance as a public company: $28 million to $32 million in revenue for 2026.
The numbers
Cash and short-term investments stood at $2.1 billion as of June 30, 2026. GAAP net loss for the quarter was $597 million, driven largely by R&D spending of $367.3 million, alongside $151.9 million in general and administrative expenses and $29.3 million in sales and marketing. Adjusted EBITDA loss came in at $68 million, a narrower figure stripping out the non-cash and one-time items behind the much larger GAAP number, and the more relevant figure for judging underlying operating trend.
Why the GAAP loss looks so large
A $597 million GAAP net loss against $8 million in quarterly revenue is a real number, not a typo, but reading this as "Quantinuum burned $597 million in cash this quarter" would be wrong. Newly public companies routinely post large GAAP losses in the quarters around an IPO from non-cash items like stock-based compensation and equity-award revaluations tied to the listing itself, which is exactly why the $68 million adjusted EBITDA loss figure exists alongside the GAAP number. The $2.1 billion cash position is the figure showing whether the company keeps operating at this spending level, not the GAAP loss line.
What else came with the report
Quantinuum said the company demonstrated "near five-nines logical fidelity" on Helios using a novel error-correcting code family, a claim worth tracking for independent confirmation the same way Helios's original 48-logical-qubit result was vendor-reported before scrutiny. The earnings release also carried the Oracle Cloud Infrastructure partnership announced the same day, plus a framework collaboration with HPE on quantum-HPC-AI integration and a joint development agreement with an unnamed electronics manufacturer on manufacturing infrastructure. CEO Rajeeb Hazra described "accelerating commercial momentum for the business," pointing to the "over $2 billion in cash" as room to keep investing "while maintaining disciplined capital allocation."
What to watch next
Whether Quantinuum's next quarterly report shows revenue tracking toward the low or high end of the $28-32 million full-year guidance range, and whether the adjusted EBITDA loss narrows or widens as R&D spending continues at this pace. The 279% year-over-year growth rate is real, but this is also growth off a minor base, the same caution worth applying to any early-stage hardware company's first few public quarterly comparisons.