Like with the dotcom bubble, investors are piling into companies exploring technologies with a commercial future that is not yet clear
3-MIN READ3-MINJames David SpellmanJames David Spellman, a graduate of Oxford University, is principal of Strategic Communications LLC, a consulting firm based in Washington, DC. Published: 4:30pm, 19 May 2026A surge in stock offerings by quantum computing firms suggests 2026 could be a breakout year for technologies still in their early stages of commercial viability.
Yet the timing – or even the trajectory – remains highly uncertain. Investors beware.
Quantum computing is built on physics governing the behaviour of atoms and subatomic particles, the unseen architecture of the universe. These incredibly tiny units of matter and energy can be in two places at once and jump instantly from being a solid to a wave, which is energy on the move. Quantum computers exploit these effects through qubits, encoded in values between 0 and 1. Imagine a spinning coin representing both heads and tails at once. A quantum computer with 300 qubits could have more possible configurations than the number of particles in the known universe.
While classical computers process binary notations one by one, qubits allow many possibilities to be evaluated at once. A classical computer tests each path of a maze in turn, retracing its steps at every dead end before restarting. In contrast, a quantum computer explores all paths simultaneously – dramatically accelerating the search for a solution.
Infleqtion joined the New York Stock Exchange in mid-February through a special purpose acquisition company (SPAC). Xanadu, listed on Nasdaq and the Toronto Stock Exchange in March, is a pure-play photonic quantum computing business. March also saw the Singapore-based Horizon Quantum start trading on Nasdaq as the first public quantum software company.
