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Buy Day today: Neutral (53) Mixed market breadth · no major macro event

QuantumSi Inc (QSI)

Healthcare Medical Devices
0.71 $
Closing price · As of: 31. Jul 2026
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Basics

Market Cap
0.2$B
Shares Outstanding
198Mio.
Float
90.6%
Beta
3.2

Performance

Perf. 1M
-25.90%
Perf. 3M
16.30%
Perf. 6M
-32.10%
YTD Performance (%)
-20.00%
52-Week-High Distance
-72.4%

Valuation

P/E
Forward P/E
0.0
PEG
P/B
0.7
P/S
77.0
EV/EBITDA
0.6
Price/FCF

Profitability

Gross Margin
40.0%
EBIT Margin
Net Margin
0.0%
Return on Equity
-46.4%
Return on Assets
-24.8%

Balance Sheet & Safety

Equity Ratio
Debt/Equity
0.02
fortress balance sheet
Altman Z″
9.53
weak
Piotroski
1 out of 9

Growth

Sales Growth Last Quarter
-69.40%
EPS Growth Last Quarter
0.00%
Sales Growth (Year)
-20.34%
Forward Sales Growth
834.69%
Forward EPS Growth
10.00%

Quality & Screener

Stage
4
RS Rating
12
EPS Rating
42
weak
Piotroski
1 out of 9
Fundamental Rating
D (40 out of 100)
fortress balance sheet
Altman Z″
9.53

AI Rating

Not yet rated — we only show a category once an SEC-backed file with at least two cited passages is available. How the Rating Is Built

Highlighted are things our editorial team noticed: green = stands out as strong, red = deserves a closer look. No single metric is a verdict on its own — always read it in context.

Sales Per Quarter ($M)
2024: Q4 · 1.2 $M Q4 2025: Q1 · 0.8 $M Q1 2025: Q2 · 0.6 $M Q2 2025: Q3 · 0.6 $M Q3 2025: Q4 · 0.5 $M Q4 2026: Q1 · 0.3 $M Q1
Earnings Per Share Per Quarter ($)
2024: Q4 · -0.23 $ Q4 2025: Q1 · -0.11 $ Q1 2025: Q2 · -0.16 $ Q2 2025: Q3 · -0.17 $ Q3 2025: Q4 · -0.09 $ Q4 2026: Q1 · -0.10 $ Q1
Net Margin Per Quarter (%)
2024: Q4 · -2,778.6 % Q4 2025: Q1 · -2,279.0 % Q1 2025: Q2 · -4,879.2 % Q2 2025: Q3 · -6,467.9 % Q3 2025: Q4 · -3,904.9 % Q4 2026: Q1 · -8,399.6 % Q1
Operating Cash Flow Per Quarter ($M)
2024: Q4 · -22.9 $M Q4 2025: Q1 · -26.2 $M Q1 2025: Q2 · -20.2 $M Q2 2025: Q3 · -32.0 $M Q3 2025: Q4 · -16.3 $M Q4 2026: Q1 · -25.6 $M Q1
Free Cash Flow Per Quarter ($M)
2024: Q4 · -24.3 $M Q4 2025: Q1 · -27.5 $M Q1 2025: Q2 · -20.5 $M Q2 2025: Q3 · -32.9 $M Q3 2025: Q4 · -16.3 $M Q4 2026: Q1 · -25.9 $M Q1
Sales Growth vs. Year-Ago Quarter (%)
2024: Q4 · 198.0 % Q4 2025: Q1 · 84.2 % Q1 2025: Q2 · -5.0 % Q2 2025: Q3 · -29.9 % Q3 2025: Q4 · -62.2 % Q4 2026: Q1 · -69.4 % Q1
Price Change in Quarter (%)
2024: Q4 · 206.1 % Q4 2025: Q1 · -55.6 % Q1 2025: Q2 · 63.3 % Q2 2025: Q3 · -28.1 % Q3 2025: Q4 · -22.0 % Q4 2026: Q1 · -29.6 % Q1

Quarterly Figures

Quarterly Figures
Quarter EPS (Earnings Per Share) EPS YoY (%) Sales ($M) Sales YoY (%) Net Margin (%) OCF ($M) FCF ($M)
2024: Q4 -0.23 1 198.00 -2,778.60 -23 -24
2025: Q1 -0.11 1 84.20 -2,279.00 -26 -28
2025: Q2 -0.16 1 -5.00 -4,879.20 -20 -21
2025: Q3 -0.17 1 -29.90 -6,467.90 -32 -33
2025: Q4 -0.09 1 -62.20 -3,904.90 -16 -16
2026: Q1 -0.10 0 -69.40 -8,399.60 -26 -26
What Do These Terms Mean?
EPS (Earnings Per Share):
Quarterly profit divided by the total share count — how much of the profit works out to a single share.
YoY (Year over Year):
Change versus the same quarter a year ago — this is how you compare without seasonal distortion (e.g. the holiday shopping season).
Sales:
All revenue for the quarter, before any costs are deducted — the top line of the income statement.
Net Margin:
What percentage of sales is left over as profit in the end. Negative means the company is posting a loss.
OCF (Operating Cash Flow):
The cash that actually flows into the till from the core business during the quarter — harder to dress up than book profit.
FCF (Free Cash Flow):
Operating cash flow minus capital expenditures — the money that's genuinely free to use, say for paying down debt, buybacks, or dividends.

About the Company

Quantum-Si incorporated, ein Life-Sciences-Unternehmen, entwickelt eine proprietäre, universelle Einzelmolekül-Detektionsplattform für die Proteomik, um die Proteinsequenzierung der nächsten Generation (NGPS) zu ermöglichen. Das Unternehmen bietet die NGPS-Instrumente Platinum und Platinum Pro für Einzelmolekül-Auflösung auf Aminosäureebene…

Employees145
HeadquartersBranford, CT
Websitequantum-si.com
IPO Date10. Jun 2021
Next Earnings4. Aug 2026

Management

Management
Name Title Birth Year
Jeffrey Alan Hawkins President, CEO & Director 1978
Jonathan M. Rothberg Ph.D. Founder & Executive Director 1964
Jeffry R. Keyes CPA CFO & Treasurer 1973
John S. Vieceli Ph.D. Chief Product Officer 1977
Todd Rearick Chief Technology Officer
Christian Lapointe J.D., Ph.D. General Counsel & Corporate Secretary 1972
Lindsay Thompson Chief Human Resources Officer

Executives per the latest required filings; titles kept in their original language. Source: fundamental data.

Insider Transactions

Insider Transactions
Date Person Role Type Shares Price Value
21. Apr 2026 Jeffry R Keyes CFO Sell 37,381 0.99 37,007
20. Apr 2026 Jeffrey Alan Hawkins CEO Sell 83,712 1.01 84,549
20. Apr 2026 Jeffry R Keyes CFO Sell 37,382 1.01 37,756

Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.

View all insider transactions →

Chart

Interactive price chart (TradingView).

Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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