Patents are one of the few durable moats in quantum computing: whoever owns the core error-correction, control and fabrication IP collects rent from the whole industry if the technology works. This list ranks pure-play quantum stocks by the size of their patent portfolios, with academic citation counts alongside as a second read on research depth.
As of · updates with live market data
Not ranked (no patents data yet): IONQ, RGTI, QBTS, QUBT, ARQQ, INFQ, QSI, XNDU, QNT, HQ, IQMX.
Methodology: Patent counts are granted patents + applications attributed to each company via the Lens.org patent database. Citations are cumulative academic citations of company-affiliated research via OpenAlex. Both undercount work published under subsidiaries or prior company names. 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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