Quantum Computing Penny Stocks
These are the pure-play quantum computing stocks currently trading under $5 per share — the SEC's classic penny-stock threshold. A low share price says nothing about company quality by itself, but stocks on this list tend to share a profile: heavy cash burn, repeated dilutive share offerings, and extreme volatility in both directions. The table shows the risk numbers that matter — cash runway and short volume — next to each name.
As of · updates with live market data
⚠ Risk warning: Penny stocks are among the riskiest securities on public markets. Sub-$5 quantum stocks in particular have histories of dilutive at-the-market offerings, reverse-split risk, going-concern warnings and 50%+ drawdowns. Nothing here is a recommendation — check each company's dilution tracker and cash runway before doing anything, and never invest money you can't afford to lose.
The companies, in order
1. Quantum-Si (QSI) — $207.31M
Quantum-Si is building a semiconductor chip-based platform for single-molecule protein sequencing using quantum-detection technology. Its Platinum Pro system targets proteomics research; next-gen Proteus instrument targets late 2026 commercial launch.
QSI live data, financials & filings →Methodology: Includes US-listed pure-play quantum stocks with a share price under $5.00 at the last update; membership changes as prices move. Cash runway = cash ÷ TTM operating burn. Short volume % is FINRA daily short volume. Covers the US-listed pure-play quantum universe tracked by this site. Full metric definitions on the methodology page. Not investment advice.
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