Research · Living data · Updated 2026-07-17
The public quantum-computing universe — hardware builders across superconducting, trapped-ion, and photonic approaches, plus the enabling supply chain.
Quantum computing is the highest-variance theme in public markets: a genuinely transformative technology, years from commercial scale, wrapped around a handful of small pure-play stocks that move violently on any headline. NextTrack maps 57 public companies to the quantum theme — the hardware builders pursuing competing qubit architectures, the quantum-software layer, and the enabling supply chain. The count refreshes on every rebuild.
| Metric | Live figure |
|---|---|
| NextTrack tracks | 57 quantum-themed companies |
| Last updated | 2026-07-17 |
One fact frames the whole theme: the number of true public pure-play quantum companies is small, and most are micro- to small-cap. Of the 57 companies NextTrack tags to the quantum theme, a large share of the market's attention concentrates on a few pure-plays, while the biggest quantum research programs sit inside mega-cap technology companies where quantum is a rounding error on revenue.
That structure is why the pure-plays are so volatile: a small float plus a binary, long-dated technology outcome equals large swings on thin news.
There is no settled winner in how to build a quantum computer, and that matters for stock selection. The main approaches — superconducting, trapped-ion, photonic, and neutral-atom — each have different roadmaps, error-correction challenges, and timelines. Owning a single pure-play is, in effect, a bet that its specific architecture wins. NextTrack's theme map keeps the full field in view so you can see the whole board rather than anchoring on one name.
The honest read on quantum in 2026 is that it remains pre-commercial for most use cases, and the stocks trade on milestones — qubit counts, error rates, government and enterprise contracts — rather than earnings. Sort the 57-name list by market cap to separate the diversified large-caps (where quantum is optionality) from the pure-plays (where it is the entire thesis). The full ranked list is on the gated theme page.
Quantum membership is drawn from a curated theme taxonomy mapped to companies and rolled up recursively across any sub-themes, then reviewed as companies enter the space. Because the pure-play universe is small, the map deliberately includes the larger enablers so the picture isn't just the four or five names that dominate headlines. Explore the interactive map on the [quantum theme page](/themes/quantum), or browse [all themes](/themes).
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