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 · market data updates live
Which quantum stocks are under $5 today?
As of , 2 tracked pure-play quantum stocks are below $5: BTQ at $3.29 and QSI at $0.7690. Membership comes from the live price filter below and changes whenever a stock crosses the $5 threshold.
⚠ 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. BTQ Technologies (BTQ) — $475.59M
BTQ Technologies develops post-quantum security hardware and networks and owns QPerfect, the Strasbourg quantum-software company behind the MIMIQ emulator, hardware-accurate digital twins, and the QLU fault-tolerant control layer for neutral-atom systems.
BTQ live data, financials & filings →2. Quantum-Si (QSI) — $167.46M
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 Q2 2027 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.
More quantum stock rankings
Explore the quantum sector