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=listed, 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
Most-diversified quantum portfolio — neutral atom computer + atomic clocks + sensors; only US-listed neutral-atom pure-play.
A $1.4B cash hoard from peak-retail ATM raises looking for a thesis — photonic chip foundry + post-quantum crypto via NuCrypt.
The only public quantum pure-play crossing $100M revenue; vertically integrating via the $1.8B SkyWater acquisition.
The screener · 3 of 41 match
Ranked by Ledger conviction
- 01HoneywellHON
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 - 02IonQIONQ
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 - 03Arqit 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
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