QuantumSi Inc (QSI) Fair Value & Analysis
Healthcare · US · Market cap $218M · ISIN US74765K1051
What is QuantumSi Inc really worth?
QuantumSi Inc
QSI · US
Below-average quality, and trading another 19% above our fair value of $0.6460.
As of Aug 13, 2026, the fair value of QuantumSi Inc is $0.6460 per share against a price of $0.7660, so the fair value sits 16% below the price. A model estimate blended from multiple valuation models, recalculated regularly.
Risks
Fair value as of: Aug 13, 2026
From 1 valuation models · updated 23 days ago
Share price +1.3% over the past month.
What runs behind every stock
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What matters now
- Weak quality (20/100) and above fair value at the same time, the margin of safety is missing on both counts.
- A fairly wide model range ($0.4250 to $0.8075) leaves room in how you read the outcome.
- Evidence is limited here (fewer models, shorter history), so the fair value is a rougher estimate than usual.
Price vs Fair Value (5 years)
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Aug 13, 2026.
How to read this chart
60‑month range $0.6330 – $13.56 · fair‑value band $0.4250 – $0.8075 · the $0.7660 price screens above the $0.6460 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Aug 13, 2026.
Analysis
QuantumSi Inc (QSI) currently trades at $0.7660, while our model-based Fair Value estimate is $0.6460, implying the stock looks roughly 18.6% overvalued today. The Quality Score stands at 20/100 (below-average quality), in the Healthcare sector. How firm this estimate is: it rests on 1 models at a data quality of 95/100, which puts the evidence level at low.
Trailing-twelve-month revenue stands at $1.9M. Revenue declined 69.4% year over year. It earns a return on equity of −46.4%. The balance sheet holds a net cash position of $17.5M. Fundamentals as of Aug 13, 2026
Our scenario range runs from $0.4250 (bear case) to $0.8075 (bull case); at $0.7660, the current price sits within that range. Bear and bull are the same models run on conservative and optimistic assumptions (margins, growth, valuation multiples), so a plausible valuation range, not a price target. The share trades about 75% below its 52-week high and 11% above its 52-week low, currently below its 200-day average. For context, the median of 10 Healthcare peers we cover trades at −34% fair-value upside, at −16%, QSI screens cheaper than that median.
Fair Value models
Each model estimates fair value its own way; the Fair Value above is the evidence-weighted, family-balanced blend. Evidence (0–100) measures how completely this model’s inputs are available: well-fed models carry more weight in the blend. The spread across models is intentional, each one stresses a different value driver; dividend models, for instance, come out structurally low when payout is small. Every input is real reported data, nothing guessed.
All 1 models by family
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Key figures & financial health
More key figures
Figures from reported company fundamentals · as of Aug 13, 2026. TTM = trailing twelve months.
Quality Score breakdown
Of which business quality 24 · Market factors (momentum, volatility) 7
Non-valuation factor families (profitability, growth, cashflow, financial strength, momentum …), each academically grounded. Valuation itself sits in the Fair Value and is deliberately excluded here to avoid double-counting.
All values are scores from 0 to 100 (100 = best against fixed, research-based bands), not percentages. The three market factors (momentum, 52-week proximity, low volatility) are displayed but carry zero weight in the headline number: market sentiment is not a business property.
About the company
Quantum-Si incorporated, a life sciences company, develops proprietary, universal, and single-molecule detection platform applied to proteomics to enable next-gen protein sequencing (NGPS).
Full company description
Quantum-Si incorporated, a life sciences company, develops proprietary, universal, and single-molecule detection platform applied to proteomics to enable next-gen protein sequencing (NGPS). The company offers Platinum and Platinum Pro NGPS instruments for single-molecule, amino acid level resolution, and automated data analysis; library preparation kits to prepare a customer's protein sample for sequencing; and sequencing kits, which contain the reagents and consumables used to perform NGPS. It also provides Platinum analysis software, a cloud-based solution that automates data analysis workflows and visualizes the sequencing results. The company was founded in 2013 and is headquartered in Branford, Connecticut.
Company description, as reported by the company or data provider.
Revenue & earnings trend
FY2021 – FY2025 · reported fiscal years
QuantumSi Inc reported revenue of $2.4M in FY2025 versus $0 in FY2021. Reported net income was −$101M in FY2025.
QSI screens 19% overvalued. Compare with Abbott Laboratories, →
Peer Group
Medical Devices · 353 stocks
How this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.
Valuation Multiples vs Medical Devices median · lower = cheaper
Context: sector, industry, market
- Is the Health Care sector expensive or cheap?
- P/E, EV/EBITDA and margins by industry (reference tables)
- Undervalued stocks: US Stocks
- Valuation of the USA market
Strength profile in five axes (Snowflake)
Five quick dimensions, each 0 to 100: VALUE (fair-value potential), FUTURE (revenue growth), PAST (return on equity), HEALTH (low debt), DIVIDEND (yield). Green = this stock, grey = typical sector peer.
Values & ESG
Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.
Similar stocks
10 more Medical Devices stocks, each showing price versus our Fair Value estimate (as of Aug 13, 2026).
| Stock | Price | Fair Value | vs Fair Value |
|---|---|---|---|
| Abbott Laboratories, ABT | $112.47 | $74.79 | −34% |
| Stryker Corporation SYK | $322.12 | $186.28 | −42% |
| Medtronic plc MDT | $89.97 | $65.57 | −27% |
| Boston Scientific Corporation BSX | $46.84 | $30.73 | −34% |
| Edwards Lifesciences Corporation EW | $89.78 | $41.02 | −54% |
| Siemens Healthineers AG SHL | €39.52 | €33.87 | −14% |
| DexCom, Inc DXCM | $90.82 | $38.95 | −57% |
| GE HealthCare Technologies Inc GEHC | $74.82 | $64.13 | −14% |
| Koninklijke Philips N.V PHIA | €23.69 | €14.36 | −39% |
| Shenzhen Mindray Bio-Medical Electronics Co 300760 | ¥150.63 | ¥147.63 | −2% |
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