The quantum cohort

A screener for the quantum economy — every public ticker and material private actor, ranked by the Ledger Score and read against the same set of editorial questions.

The most useful screener for a pre-revenue sector is the one that lets you sort by conviction, not market cap.

— the editorial premise of this directory

The cohort below is the universe the Ledger watches every weekday. It is curated, not exhaustive: each name is here because it is either publicly listed, materially funded, or carrying a technical claim other operators take seriously. The Ledger Score is a composite — capital, technical milestones, sentiment, policy, talent, patents — and is not a recommendation. Treat the rankings as a starting point, the per-company profile as the actual argument.

Filter by ownership=all, modality=software, or change the sort order=score. The directory state lives in the URL — copy the address bar and you've shared the screen.

Most active · today's session

Where the cohort is moving

INFQ-11.0%

Most-diversified quantum portfolio — neutral atom computer + atomic clocks + sensors; only US-listed neutral-atom pure-play.

Neutral atomBoulder, CO, USA

QUBT-10.4%

A $1.4B cash hoard from peak-retail ATM raises looking for a thesis — photonic chip foundry + post-quantum crypto via NuCrypt.

PhotonicHoboken, NJ, USA

IONQ-9.6%

The only public quantum pure-play crossing $100M revenue; vertically integrating via the $1.8B SkyWater acquisition.

Trapped ionCollege Park, MD, USA

The screener · 6 of 41 match

Ranked by Ledger conviction

Ownership

All Listed Private

Modality

All modalities Superconducting Trapped ion Neutral atom Photonic Silicon spin Annealing Topological Software & QEC

Sort

Ledger Score Market cap Δ session A–Z

Name · tickerModality · HQCapΔ sessionLedger Score

A cohort is not an index. We omit names that publish only aspirational roadmaps; we include names with no revenue if a sovereign technical buyer has audited the science.

— directory methodology