Six quantum computing companies went public in 2026, and most investors still cannot name more than two of them.
Meanwhile, two newer listings are doing the less glamorous work of actually building and shipping quantum machines to paying customers.
It builds superconducting quantum computers, crates them up, and installs them in the customer's building.
The central problem in quantum computing is that qubits make errors constantly, and a useful machine needs to catch and fix those errors faster than they pile up.
That is a quantum company moving from hand-built lab equipment toward something resembling a semiconductor supply chain.