The 2026 Quantum IPO Watch — Names to Track, Not Yet Investable
Several quantum pure-plays are moving from private to public in 2026. Watch them — but resist the urge to chase IPO days.
2026 is shaping up as the year quantum hardware finally hits the public markets in size. Quantinuum (Honeywell-owned, 54%) filed its S-1 on May 8, 2026 with an IPO planned mid-June as "QNT"; Series B was at a $10B pre-money valuation. PsiQuantum remains private but Forge secondaries traded at ~$30.51/share on May 25, 2026, implying a $7B+ valuation; Brisbane facility anchored May 21. Infleqtion listed via SPAC in February 2026 (first publicly traded neutral-atom quantum company). Xanadu dual-listed Nasdaq + TSX March 2026 (photonic). QuEra published 96 logical qubits / 448 atoms in Nature, January 2026 — still private.
None of these are commercial chokepoints today. They are early-stage hardware companies competing for the same research and government dollars. Watch them — especially Quantinuum, which has the deepest moat. But buying any of them on IPO day is rarely the best move.
4 names on the watchlist
S-1 filed May 8, 2026. IPO targeted mid-June 2026. Honeywell owns 54%. Series B at $10B pre-money.
The most credible pure-play quantum IPO of 2026. Trapped-ion technology derived from Honeywell + Cambridge Quantum merger. Strongest engineering team in trapped-ion. Honeywell remains a 54% owner — buying HON gives you partial exposure today.
Photonic quantum. $7B post-money post Sept 2025 $1B Series E (BlackRock, Temasek, Baillie Gifford, NVentures).
Most credible photonic-quantum pure-play. Targeting 1M-qubit machines via silicon photonics manufacturing at GlobalFoundries. Brisbane facility anchored May 21, 2026. Includes NVIDIA's NVentures as a backer — strategic validation. Private but worth tracking for an eventual IPO.
Listed Feb 2026 via SPAC. First publicly traded neutral-atom quantum company.
Neutral-atom quantum pioneer. Listed via SPAC, February 2026. First publicly traded neutral-atom company. Watch for revenue scaling and customer announcements; SPAC liquidity is thin in the early days.
Photonic quantum. Nasdaq + TSX dual listing March 2026.
Canadian photonic-quantum pure-play. Dual-listed Nasdaq + TSX in March 2026. Competes head-to-head with PsiQuantum in photonic. Very small commercial revenue today.
- Business Research Insights, AAAS · May 2026