Branford-based biotech Quantum-Si at risk of Nasdaq delisting, again
Quantum-Si Inc. (QSI) faces a second Nasdaq delisting risk after its Class A shares closed below $1 for 30 straight business days, according to a July 24 SEC filing. Shares traded around 78 cents, down about 29% YTD. Nasdaq gives until Jan. 19, 2027 to regain compliance. Q1 revenue was $258,000 and net loss $21.7 million.
How this was made
The 30-second read
Why it matters
A second Nasdaq minimum-bid warning in under two years increases delisting risk and can pressure liquidity, financing options, and investor demand while the stock remains below $1.
Market read
Traders should treat this as a compliance-driven catalyst with a clear deadline and a history of prior resolution, which can drive volatility and positioning around $1.
What to watch
The article does not detail the company’s specific plan (financing, reverse split, or bid-price support), which could materially change the probability of regaining compliance before Jan. 19, 2027.
Background
Quantum-Si is a desktop protein sequencing biotech that went public in June 2021 via a merger with HighCape Capital Acquisition Corp.
Ticker impact
Nasdaq warned Quantum-Si that QSI closed below $1 for 30 straight business days, risking delisting again and requiring compliance by Jan. 19, 2027.
Near-term downside bias and higher volatility risk until QSI regains $1 compliance thresholds.
The article cites a fresh Nasdaq notice tied to the $1 minimum bid rule and provides the specific compliance deadline and prior history of similar warnings.
Market effects
Highlights ongoing Nasdaq listing pressure for small-cap biotech names, potentially tightening risk appetite for the group.
Connecticut bioscience companies face similar listing-risk headlines, which can weigh on local small-cap sentiment.
Limited direct global impact, but reinforces broader microcap liquidity and compliance risk concerns.
Counterpoint
The company previously resolved a similar Nasdaq notice within weeks, suggesting it may be able to engineer compliance again despite current weakness.
Key entities
- companyQuantum-Si Inc.
Nasdaq-listed biotech whose Class A shares (QSI) fell below the $1 minimum bid price requirement again.
- exchangeNasdaq
Issued the delisting warning after QSI closed below $1 for 30 consecutive business days.
- executiveJeffry Keyes
CFO who signed the July 24 SEC filing stating the company will consider options to regain compliance.


