QuantumSi Inc
NASDAQ: QSI · HEALTHCARE · MEDICAL DEVICES
Updated 2026-04-30
QuantumSi Inc (QSI) Stock Valuation Analysis
Fair value estimate, historical valuation range, and quality signals for QSI.
Current price exceeds what fundamentals support. Risk/reward skewed unfavorably.
QSI historical valuation range
Where current P/E sits in QSI's own 5Y range.
QSI intrinsic value (DCF)
DCF-based fair value estimate vs current market price.
Standard discounted cash flow models produce unreliable output for unprofitable or near-breakeven companies. Revenue-based multiples such as P/S and EV/Sales, combined with the historical valuation position above, give a more reliable read for this stock.
Intrinsic value calculated using discounted cash flow (DCF) model based on projected free cash flows, discount rate, and terminal growth assumptions. A positive margin of safety indicates the current price is below estimated fair value, providing a cushion against estimation error.
QSI valuation signals
Quick-read green flags, caution flags, and risks based on current metrics.
P/E Ratio — History
P/S Ratio — History
Current: 81.01x
Is QSI overvalued in 2026?
QuantumSi Inc (QSI) currently trades at $0.98 per share with a market capitalization of $197,328,000.00. Based on our multi-factor framework, the stock appears richly valued with a Smart Value Score of 26/100. This score blends growth quality, financial health, and price attractiveness into a single institutional-grade read.
QSI currently has no meaningful P/E ratio, which typically signals that the company is unprofitable, near breakeven, or emerging from a loss-making period. With a P/S ratio of 81.0x, the market is valuing the company primarily on its revenue rather than its earnings.
A standard DCF model does not produce reliable output for QSI under current conditions. For unprofitable or near-breakeven companies, revenue-based multiples such as EV/Sales and historical P/S percentile are more informative than intrinsic value calculations.
Financial quality is a concern. The Piotroski F-Score of 1/9 flags weakening fundamentals that deserve closer scrutiny before the valuation case can be fully trusted.
Bottom line: QSI appears richly valued on our framework, with a Smart Value Score of 26/100. At current levels the risk/reward is skewed against the buyer. A materially lower price or significant operational improvement would be needed to change the picture.
Frequently asked questions
Is QSI overvalued in 2026?
Based on a Smart Value Score of 26/100, QSI appears overvalued. Current price exceeds what fundamentals currently justify.
What is QSI's fair value?
Standard DCF is unreliable for QSI due to its current profitability profile. Revenue-based approaches such as EV/Sales or historical P/S percentile are more informative for this stock.
What P/E ratio does QSI trade at?
QSI does not have a meaningful P/E ratio at this time, typically a sign of unprofitability or an ongoing earnings transition.
Is QSI a buy based on valuation?
WallStSmart does not issue buy or sell recommendations. Our Smart Value Score of 26/100 reflects the combined read on growth, quality, and price. The profile skews cautious. Consider waiting for a better price or clearer operational improvement.
How does QSI's valuation compare to its history?
Insufficient historical valuation data exists yet for a confident percentile read on QSI.
What is QSI's Smart Value Score?
QSI's Smart Value Score is 26/100. The Smart Value Score is a proprietary WallStSmart metric blending growth quality, financial health, and valuation attractiveness into a single 0-100 read. Scores above 75 are rare and indicate strong multi-factor alignment.