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Vol. III·Sector Directory·Companies
41 names · listed & material private
Boulder · Colorado
updated continuously

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=trapped-ion, 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
AllListedPrivate
Modality
All modalitiesSuperconductingTrapped ionNeutral atomPhotonicSilicon spinAnnealingTopologicalSoftware & QEC
Sort
Ledger ScoreMarket capΔ sessionA–Z
  1. 01
    HoneywellHON

    The pre-IPO public-market proxy for Quantinuum — ~54% owner ahead of the Quantinuum (QNT) listing at $20B+ target valuation.

    Trapped ion

    Charlotte, NC, USA

    $132.0B
    -2.1%
    83/100
  2. 02
    IonQIONQ

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

    Trapped ion

    College Park, MD, USA

    $20.8B
    -9.6%
    81/100
  3. 03
    QuantinuumPRIVATEPrivate

    Highest-fidelity trapped-ion stack in commercial production; S-1 filed May 8 2026 targeting $20B+ IPO under ticker QNT.

    Trapped ion

    Broomfield, CO / Cambridge, USA/UK

    n/a
    n/a
    78/100
  4. 04
    Arqit QuantumARQQ

    Post-quantum cryptography pure-play — bets symmetric key agreement beats NIST PQC algorithms in enterprise procurement.

    Encryption

    London, UK

    $230.0M
    -3.8%
    23/100
  5. 05
    Universal QuantumPRIVATEPrivate

    UK trapped-ion company building toward one-million-qubit modular architecture via silicon-chip-based ion traps and electric-field qubit transport — distinct from QCCD shuttling.

    Trapped ion

    Brighton, UK

    n/a
    n/a
    0/100
  6. 06
    Alpine Quantum Technologies (AQT)PRIVATEPrivate

    Austrian Innsbruck-physics-lab spinout (Rainer Blatt) building rack-mounted commercial ion traps — the only true "quantum computer in a box" product on the market.

    Trapped ion

    Innsbruck, Austria

    n/a
    n/a
    0/100

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

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