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 , 3 tracked pure-play quantum stocks are below $5: XNDU at $4.12, BTQ at $2.79 and QSI at $1.22. Membership comes from the live price filter below and changes whenever a stock crosses the $5 threshold.
Best quantum penny stocks? Compare the risks first
Low price is not quality. This is a risk screen, not a buy recommendation. The same qualifying stocks are compared below using the latest recorded financial data available as of .
- Xanadu (XNDU): cash runway 53 months; recorded dilution filings: 10. Review filings.
- BTQ Technologies (BTQ): cash runway 5 months; recorded dilution filings: 1. Review filings.
- Quantum-Si (QSI): cash runway 15 months; recorded dilution filings: 29. Review filings.
Runway is cash divided by trailing-12-month operating cash burn; CF+ means operating cash flow is positive. Recorded dilution filings include shelf registrations and offering prospectuses, not a count of completed share sales or the amount of dilution. Zero recorded filings does not mean no dilution risk. Financial periods and filing coverage differ by company; review the dated source filings on each stock page.
⚠ 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. Xanadu (XNDU) — $1.25B
Xanadu is a photonic quantum computing company developing room-temperature, light-based quantum computers and open-source quantum software. Its Aurora system (Jan 2025) is the world's first scalable modular photonic quantum computer. PennyLane is the leading open-source quantum ML library.
XNDU live data, financials & filings →2. BTQ Technologies (BTQ) — $403.31M
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 →3. Quantum-Si (QSI) — $265.67M
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.
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