Key Takeaways:
- IonQ insiders sold $576m more than they bought since May 2021
- Rigetti Computing insiders recorded $60.3m in net selling
- D-Wave Quantum insiders unloaded $295m in net stock sales
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Quantum computing insiders sell $931m in stock as valuations surge
Insiders at three pure-play quantum computing companies have sold $931 million more in stock than they purchased over the past five years, a signal that those closest to the businesses see frothy valuations.
"The magnitude of insider selling relative to buying is striking," Tom Brennan, an analyst tracking shareholder actions, said. "When executives and board members are overwhelmingly sellers, it warrants attention."
IonQ led the group with $576 million in net insider selling since May 2021, followed by D-Wave Quantum at $295 million and Rigetti Computing at $60.3 million. Over the same period, insider buying across the three companies totaled just $4.3 million — $3.35 million at IonQ, $625,000 at Rigetti and $309,080 at D-Wave.
The selling comes as quantum computing stocks have dramatically outperformed even the hottest AI names. IonQ, Rigetti and D-Wave posted trailing 12-month returns of as much as 6,217 percent through mid-October 2025, according to the source data. Boston Consulting Group estimates quantum computing could add up to $850 billion in global economic value by 2040.
Yet the valuations imply expectations far beyond current commercial reality. IonQ trades at 109 times sales, while Rigetti and D-Wave command price-to-sales multiples of 836 and 791, respectively. Historically, a P/S ratio above 30 for companies at the forefront of transformative technologies has proven unsustainable over the long term, the data shows.
Some insider selling reflects routine tax-related transactions — most executives receive compensation in stock and must sell to cover liabilities. But the near-total absence of discretionary buying suggests limited conviction at current levels. Every next-big-thing trend over the past three decades has experienced an early-stage bubble-bursting event as investors overestimated adoption timelines, and quantum computing has yet to achieve widespread commercial deployment or a clear path to rapid enterprise optimization.
The insider activity puts a spotlight on the gap between market enthusiasm and business fundamentals. Investors will watch the next quarterly filings for any acceleration in insider selling or, conversely, the first signs of insider buying that could signal a shift in sentiment.
This article is for informational purposes only and does not constitute investment advice.
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