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Quantum-si Inc (QSI) stock

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NASDAQ: QSI Nasdaq Life Sciences Tools & Services Next results ~November 5, 2026

E Fundamentals grade

Quantum-si Inc is a US-listed company in the life sciences tools & services industry. Its financial year ends in December.

Stock price today

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Third-party market data · may be delayed

Fair value per share

Under review: every model's value for Quantum-si Inc is far from the share price, which usually points to a data problem (a merger, a share-count change, a one-off) rather than a bargain or a bubble.

Price vs value

Under review: free cash flow after stock pay is not positive. We'll show the comparison once resolved.

Quantum-si Inc valuation: adjust assumptions and compare models →

Who’s trading

What company insiders, investment funds and members of Congress have been doing with the stock, from their own filings.

  • Insiders2 buying, 4 selling2 purchases and 30 sales by directors and officers, last 12 monthsInsider trades
  • Funds63 adding, 98 cuttingOf 22 active managers that changed their stake, 11 added; quarter to June 30, 2026Fund buyers and sellers

Value diary

Our note on each quarter Quantum-si files

Where Quantum-si stands after its latest 10-Q

Quantum-si has little or no product revenue yet; it used $94m of cash in the twelve months to June 2026. That puts it 45 of 46 for growth among the life sciences tools & services companies we cover. The diluted share count is up 31.2% on a year earlier, which dilutes existing holders. Against its peers on growth, profitability, cash generation and balance sheet, it grades E. It passes 2 of our 2 financial-health checks.

Our model value for Quantum-si is under review, so past values are not shown until it is resolved.

Source: 10-Q filed August 13, 2026 on SEC EDGAR · Financials · Valuation

Written from the company's filings and our models when each quarter's report arrives. Figures in older notes are as published at the time. Not investment advice.

The Fundamentalytics view

Next results ~November 5, 2026 (estimated)

Quantum-si Inc's trailing-twelve-month revenue fell 53.0% year on year, with a free-cash-flow margin of -5837.3%. Where it stands out: days sales outstanding of 13 days ranks 1 of 48 life sciences tools & services companies we cover. Where it lags: stock pay as % of revenue of 693.5% ranks 53 of 53 life sciences tools & services companies we cover.

Current signal Revenue growth decelerating: TTM revenue growth slowed to -53.0% (-6.8pp vs the prior quarter), the 9th consecutive quarterly slowdown.

Assembled from SEC-filed figures — the full workings are on this page and in our methodology. Observations, not recommendations.

Highlights

How we pick these

Strengths

  • Net cash. Cash exceeds long-term debt by $0.0bn.
  • Beating expectations. Earnings per share beat the analysts' consensus estimate in each of the last four quarters.

Things to watch

  • Results due soon. Results are expected around 4 November; the share price can move sharply on the day.
  • Revenue shrinking. Revenue fell 53.0% over the last 12 months.
  • Growth slowing. The growth rate is 6.8 points lower than a quarter earlier.
  • Loss-making. Operating margin is -6887.8%: costs exceed revenue.
  • Margins narrowing. Operating margin is down 3546.7 points on a year ago.
  • Burning cash. Free cash flow was -5837.3% of revenue over the last 12 months.

Latest results: FY2026 Q2

Filed August 13, 2026
Earnings per share
-$0.10 against an average estimate of -$0.10: beat by 4.8%
Revenue
$0m, down 41.8% on a year earlier
Share reaction
-11.6% in the first session after the results on August 13, 2026, against +0.5% for the S&P 500
Next report
November 5, 2026; average EPS estimate -$0.12

Quantum-si's figures from its SEC filings and results release; estimates are the analysts' average. Not a recommendation.

Price chart

  • 1 day-13.7%
  • 1 week-13.7%
  • 1 month-18.7%
  • This year+14.5%
  • 1 year-41.4%
  • 5 years-85.0%
  • S&P 500 this year+11.2%

Closing prices to 2026-11-02. Price change only, dividends excluded.

Loading chart…

Third-party market data · may be delayed

At a glance

Trailing twelve months, from SEC filings

Profitability

Revenue (TTM)
$1.6M
Operating margin
-6887.8%
Net margin
-6138.3%
EPS (TTM, diluted)
$-0.46

Growth

Revenue growth
−53.0%
Change in growth rate
−6.8 pts
Share count change
+31.2%

Cash

Free cash flow (TTM)
-$93.7M
FCF margin
-5837.3%
Stock pay % of revenue
693.5%

Earnings

Last results
August 13, 2026
Next results (est.)
November 4, 2026

News & updates

Updated October 31, 2026

Company announcements, filed results and changes that matter to shareholders.

  1. Announcement
  2. Announcement
  3. Announcement
  4. Results

Refreshed hourly when new source data is available. Summaries are checked against company releases and SEC filings. Company announcement headlines are labelled when a checked summary is unavailable.

Valuation

Quantum-si Inc valuation models and calculator

Fundamentalytics rating

model v1.6 · 2026-11-03

Not rated: free cash flow after stock pay is not positive.

The inputs used by the models below have passed source checks. Individual model values are available below and in the interactive valuator. Their differences are shown explicitly; the platform combined value and recommendation remain withheld.

Valuation models

We value Quantum-si Inc as an operating company, with every model that fits that kind of business. Cost of equity 12.1%: the 10-year Treasury yield (4.9%) plus a beta of 1.59 times a 4.5% equity risk premium.

Value per share by model
Model Value per share In the combined value?
Revenue-to-maturity model Revenue grown to maturity with the cash margin moving to the industry's; for companies not yet profitable. — Does not apply: This model is withheld pending its input or assumption review.
Price-to-earnings vs peers Earnings per share times peers' typical (harmonic-mean) price-to-earnings. — Does not apply: This model is withheld pending its input or assumption review.
Residual income Book value plus the present value of returns above the cost of equity, fading over ten years. — Does not apply: This model is withheld pending its input or assumption review.
Justified price-to-book Book value times (return on equity - growth) / (cost of equity - growth): steady-state returns. — Does not apply: This model is withheld pending its input or assumption review.
Price-to-sales vs peers Sales per share times peers' typical price-to-sales; used only when earnings are negative. ~$0.0 ~$0.0–$0.1 Left out: out of range vs price (0.01x)
Combined value Individual source-checked model scenarios are available. The platform combined value and recommendation remain withheld. — Combined value withheld. Review the individual models and their assumptions.

Different models fail in different ways, so where several apply we average them rather than trust one. Peer-based models compare Quantum-si Inc with Life Sciences Tools & Services in our coverage, using third-party market data. Model values are estimates under stated assumptions, updated as new filings arrive; not price targets or investment advice. How each model works.

Valuation multiples over time Market data may be delayed

At fiscal year end 20212022202320242025Now
Share price$7.87$1.83$2.01$2.70$1.10$1.26
Market value$626m$255m$284m$387m$218m$271m
+ Net debt (− = net cash)−$36m−$84m−$134m−$49m−$22m−$24m
Enterprise value$591m$171m$150m$337m$196m$247m
Multiples
Price / sales ——n/m126.4x89.3x168.7x
Price / earnings ——————
Price / free cash flow ——————
EV / EBITDA ——————

Market value uses the period's diluted share count; figures for each fiscal year use that year's results and the price at year end. "Now" uses today's price and the last twelve months.

Moat

Not assessed: fewer than five years of comparable figures in the filings. AI disruption exposure for this industry: Medium.

A rules-based reading of reported figures, not a forecast and not investment advice. How the score is built: methodology.

Forecasts and guidance

Next results: November 5, 2026, after the close. Analysts expect revenue of $268330 and EPS of −$0.12 (range −$0.12 to −$0.12) for the quarter.

Analysts' consensus

Fiscal yearEPSGrowthRevenueGrowth
Current −$0.40 −5% $1m −53%
Next −$0.35 +13% $6m +406%

How the EPS forecast has moved

The consensus EPS forecast for the current fiscal year is 0.0% on 90 days ago. In the last 30 days, 1 analyst raised Quantum-si Inc's forecast and 0 cut it.

Consensus EPS forecast Quantum-si Inc, last 90 days
−$0.40 −$0.30 −$0.20 −$0.10 $0.00 90 days ago 60 days ago 30 days ago 7 days ago Now Current fiscal year, 90 days ago: −$0.40 Current fiscal year, 60 days ago: −$0.40 Current fiscal year, 30 days ago: −$0.40 Current fiscal year, 7 days ago: −$0.40 Current fiscal year, Now: −$0.40 −$0.40 Next fiscal year, 90 days ago: −$0.36 Next fiscal year, 60 days ago: −$0.36 Next fiscal year, 30 days ago: −$0.36 Next fiscal year, 7 days ago: −$0.36 Next fiscal year, Now: −$0.35 −$0.35

Average of analysts' published estimates (third-party data).

View chart data
Period Current fiscal yearNext fiscal year
90 days ago −$0.40−$0.36
60 days ago −$0.40−$0.36
30 days ago −$0.40−$0.36
7 days ago −$0.40−$0.36
Now −$0.40−$0.35

Earnings against estimates

Quarter toEstimateActualSurprise
Jun 2026 −$0.10 −$0.10 +4.8%
Mar 2026 −$0.10 −$0.09 +10.8%
Dec 2025 −$0.13 −$0.08 +41.4%
Sept 2025 −$0.12 −$0.09 +25.5%

Adjusted EPS as companies report it, against the average analyst estimate.

Analyst recommendations

3 analysts, Oct 2026
Buy267%
Hold133%
Sell00%

Monthly trend

  1. Oct 2026213
  2. Sep 2026213
  3. Aug 2026213

Counts of recommendations published by analysts covering Quantum-si Inc, by month. Source: Aggregated broker recommendations (third-party data). Aggregated counts only: we do not reproduce any firm's recommendation or price target, and these are not Fundamentalytics ratings.

Positioning

Short interest
7.4%
of tradable shares
Days to cover
1.38
at average volume
Short interest, 1 month
+1%
to October 15, 2026
Held by institutions
25%
of shares
Held by insiders
10.5%
of shares
Employees
145
full time

Consensus figures average analysts' published estimates (third-party data); guidance is the company's own. Neither is our forecast. Short interest is reported twice a month and lags. Market data may be delayed.

This section is general information, not investment advice or a personal recommendation, and it does not take account of your objectives or circumstances. Forecasts and guidance are estimates, not promises: companies miss their own guidance and analysts' figures are often revised. Prices can fall as well as rise, and you can lose money. See our disclaimer.

Share-price performance

Market data may be delayed

What moved the share price

Last 12 months −41.4%

$2.15 on October 31, 2025 to $1.26

ThenNowEffect
Revenue (last 12 months) $3m $2m −53.0%
P/S multiple 103.2x 168.7x +63.5%
Share count 164m 215m −23.8%

Biggest factor: revenue. Loss-making at one end, so the split uses price/sales.

The effects multiply back to the price change exactly. Results are the last 12 months as known on each date (filings assumed public 45 days after quarter end).

Return and risk by year

Calendar year 202120222023202420252026 to date
Return
QSI−23%−77%+10%+34%−59%+15%
Industry peers (median)+5%−51%−3%−15%−2%+16%
S&P 500+29%−18%+26%+25%+18%+11%
Months that ended higher
QSI42%25%50%42%33%55%
S&P 50075%42%67%75%75%46%
Largest fall from a high during the year
QSI−75%−78%−71%−72%−77%−46%
S&P 500−5%−25%−10%−8%−19%−9%

Worst fall since November 13, 2020: 97% from February 18, 2021 to November 19, 2024. Getting back needed a 3440% gain, and the shares have not yet recovered.

Price behaviour

52-week range
$0.70 – $2.00
From 52-week high
−37.0%
vs 50-day average
+19.7%
vs 200-day average
+30.9%
Volatility (1 year)
101%
Beta vs S&P 500
3.53

Volatility is the annualised standard deviation of daily returns. Beta 1.5 means the shares typically moved 1.5% for each 1% move in the S&P 500 over the past year. Prices to November 2, 2026.

Share price after results

Next day
2 up, 10 down
typical move ±7.8%
After a week
6 up, 6 down
typical move ±15.2%
After a month
6 up, 6 down
typical move ±20.5%
Results releasedNext dayS&P 500 next day5 days21 days
August 13, 2026 −11.6% +0.5% −6.8% −13.4%
May 7, 2026 −11.9% +0.5% −9.4% +2.9%
March 3, 2026 −2.5% −0.2% +11.5% −19.8%
November 5, 2025 −10.3% −0.7% −17.4% −21.7%
August 5, 2025 −4.9% +0.3% −19.4% −25.7%
May 15, 2025 −2.6% +1.1% +14.5% +16.4%
March 3, 2025 0.0% −2.9% −14.9% −13.0%
November 12, 2024 −20.9% −0.3% −36.7% +81.0%
August 7, 2024 −2.8% +1.6% +1.0% +4.5%
May 9, 2024 −5.6% +0.7% +3.3% −19.4%
February 29, 2024 +6.3% +1.3% +20.1% +6.3%
November 9, 2023 +14.5% +0.8% +27.8% +21.8%

From the close before the release date to the close 1, 5 and 21 trading days after it, so releases before the open and after the close are both captured. Past moves don't predict future ones.

Quantum-si Inc in five measures

Fundamentals grade E
Growth Profitability Cash Balance sheet

Growth, profitability, cash generation and balance sheet are percentiles against the companies we cover in the same industry, from SEC filings (100 = best). Value compares the share price with our modelled value range (50 = at our base value; higher = cheaper). A description of reported data and our model — not a quality score or advice.

Fundamentals

Revenue (TTM) Quantum-si Inc
$0 $1M $2M $3M $4M FY23 Q3 FY24 Q2 FY25 Q1 FY26 Q2 Revenue (TTM), FY23 Q3: $682K Revenue (TTM), FY23 Q4: $1.1M Revenue (TTM), FY24 Q1: $1.3M Revenue (TTM), FY24 Q2: $1.7M Revenue (TTM), FY24 Q3: $2.3M Revenue (TTM), FY24 Q4: $3.1M Revenue (TTM), FY25 Q1: $3.4M Revenue (TTM), FY25 Q2: $3.4M Revenue (TTM), FY25 Q3: $3.2M Revenue (TTM), FY25 Q4: $2.4M Revenue (TTM), FY26 Q1: $1.9M Revenue (TTM), FY26 Q2: $1.6M $1.6M

Source: SEC EDGAR filings. Retrieved October 29, 2026.

View chart data
Period Revenue (TTM)
FY23 Q3 $682K
FY23 Q4 $1.1M
FY24 Q1 $1.3M
FY24 Q2 $1.7M
FY24 Q3 $2.3M
FY24 Q4 $3.1M
FY25 Q1 $3.4M
FY25 Q2 $3.4M
FY25 Q3 $3.2M
FY25 Q4 $2.4M
FY26 Q1 $1.9M
FY26 Q2 $1.6M
Revenue growth, TTM YoY Quantum-si Inc
-200% 0% 200% 400% 600% FY24 Q1 FY24 Q3 FY25 Q1 FY25 Q3 FY26 Q2 Revenue growth, TTM YoY, FY24 Q1: 405.9% Revenue growth, TTM YoY, FY24 Q2: 270.8% Revenue growth, TTM YoY, FY24 Q3: 232.3% Revenue growth, TTM YoY, FY24 Q4: 182.6% Revenue growth, TTM YoY, FY25 Q1: 167.9% Revenue growth, TTM YoY, FY25 Q2: 100.5% Revenue growth, TTM YoY, FY25 Q3: 40.2% Revenue growth, TTM YoY, FY25 Q4: -20.3% Revenue growth, TTM YoY, FY26 Q1: -46.2% Revenue growth, TTM YoY, FY26 Q2: -53.0% -53.0%

Source: SEC EDGAR filings. Retrieved October 29, 2026.

View chart data
Period Revenue growth, TTM YoY
FY24 Q1 405.9%
FY24 Q2 270.8%
FY24 Q3 232.3%
FY24 Q4 182.6%
FY25 Q1 167.9%
FY25 Q2 100.5%
FY25 Q3 40.2%
FY25 Q4 -20.3%
FY26 Q1 -46.2%
FY26 Q2 -53.0%
Operating margin (TTM) Quantum-si Inc
-20000% -15000% -10000% -5000% 0% FY23 Q3 FY24 Q2 FY25 Q1 FY26 Q2 Operating margin (TTM), FY23 Q3: -17907.8% Operating margin (TTM), FY23 Q4: -10274.6% Operating margin (TTM), FY24 Q1: -8195.3% Operating margin (TTM), FY24 Q2: -6161.5% Operating margin (TTM), FY24 Q3: -4668.2% Operating margin (TTM), FY24 Q4: -3550.6% Operating margin (TTM), FY25 Q1: -3204.4% Operating margin (TTM), FY25 Q2: -3341.1% Operating margin (TTM), FY25 Q3: -3956.0% Operating margin (TTM), FY25 Q4: -4766.0% Operating margin (TTM), FY26 Q1: -6211.7% Operating margin (TTM), FY26 Q2: -6887.8% -6887.8%

Source: SEC EDGAR filings. Retrieved October 29, 2026.

View chart data
Period Operating margin (TTM)
FY23 Q3 -17907.8%
FY23 Q4 -10274.6%
FY24 Q1 -8195.3%
FY24 Q2 -6161.5%
FY24 Q3 -4668.2%
FY24 Q4 -3550.6%
FY25 Q1 -3204.4%
FY25 Q2 -3341.1%
FY25 Q3 -3956.0%
FY25 Q4 -4766.0%
FY26 Q1 -6211.7%
FY26 Q2 -6887.8%
FCF margin (TTM) Quantum-si Inc
-15000% -10000% -5000% 0% FY23 Q3 FY24 Q2 FY25 Q1 FY26 Q2 FCF margin (TTM), FY23 Q3: -14813.3% FCF margin (TTM), FY23 Q4: -9107.8% FCF margin (TTM), FY24 Q1: -7122.8% FCF margin (TTM), FY24 Q2: -5130.1% FCF margin (TTM), FY24 Q3: -3912.8% FCF margin (TTM), FY24 Q4: -3020.9% FCF margin (TTM), FY25 Q1: -2776.2% FCF margin (TTM), FY25 Q2: -2826.2% FCF margin (TTM), FY25 Q3: -3311.9% FCF margin (TTM), FY25 Q4: -3991.5% FCF margin (TTM), FY26 Q1: -5166.8% FCF margin (TTM), FY26 Q2: -5837.3% -5837.3%

Source: SEC EDGAR filings. Retrieved October 29, 2026.

View chart data
Period FCF margin (TTM)
FY23 Q3 -14813.3%
FY23 Q4 -9107.8%
FY24 Q1 -7122.8%
FY24 Q2 -5130.1%
FY24 Q3 -3912.8%
FY24 Q4 -3020.9%
FY25 Q1 -2776.2%
FY25 Q2 -2826.2%
FY25 Q3 -3311.9%
FY25 Q4 -3991.5%
FY26 Q1 -5166.8%
FY26 Q2 -5837.3%

Data: SEC EDGAR XBRL company facts (as filed in 10-K/10-Q); forms 10-K, 10-K/A, 10-Q, 10-Q/A. Generated November 3, 2026. Definitions in our methodology.

Financial statements

US$ millions unless shown otherwise. Fiscal years, plus the last twelve months (LTM) when newer.

Fiscal year 2021 Dec 2021 2022 Dec 2022 2023 Dec 2023 2024 Dec 2024 2025 Dec 2025 LTM Jun 2026
Income
Revenue 0 0 1 3 2 2
Gross profit 0 0 0 2 1 1
EBITDA −96 −121 −107 −104 −112 −106
Operating income −97 −124 −111 −109 −116 −111
Net income −95 −132 −96 −101 −101 −99
Diluted EPS −$1.19 −$0.95 −$0.68 −$0.71 −$0.51 −$0.46
Growth (year on year)
Revenue — — — +182.6% −20.3% −53.0%
Margins
Gross margin — — 45.1% 52.3% 47.3% 35.0%
EBITDA margin — — <−999% <−999% <−999% <−999%
Operating margin — — <−999% <−999% <−999% <−999%
Net margin — — <−999% <−999% <−999% <−999%
Free-cash-flow margin — — <−999% <−999% <−999% <−999%
Cash flow
Cash from operations −67 −91 −94 −88 −95 −92
Capital spending 6 11 5 5 3 1
Free cash flow −73 −101 −99 −92 −97 −94
Stock-based pay 25 11 9 9 11 11
Free cash flow after stock pay −97 −113 −107 −101 −108 −105
Balance sheet
Cash 36 84 134 49 22 24
Total debt 0 0 0 0 0 0
Net debt (negative = net cash) −36 −84 −134 −49 −22 −24
Diluted shares 80m 139m 141m 143m 198m 215m

Source: SEC EDGAR XBRL company facts (US and foreign periodic filings); column headings link to the filing. EBITDA is operating income plus depreciation and amortisation. Free cash flow is cash from operations minus capital spending. Growth is left blank when last year's figure was a loss or under 2% of revenue. Share counts and EPS are restated for stock splits. A dash means the company didn't report the figure.

Financial health

2 of 2 checks passed · June 30, 2026
What it owns · $194m
Short-term assets $119mLonger-term assets $74m
What it owes, and who funded it · $194m
Short-term liabilities $12mLonger-term liabilities $1mShareholders' equity $180m
  • Short-term assets cover short-term liabilities $119m of assets due within a year against $12m of liabilities due within a year.
  • Short-term assets cover long-term liabilities $119m short-term assets against $1m of longer-dated liabilities.
  • More cash than debt Cash or debt not separately reported. Not assessable.
  • Debt below 40% of shareholders' equity Equity or debt not reported. Not assessable.
  • Debt burden no higher than five years ago Five-year comparison not available. Not assessable.
  • A year's operating cash flow covers at least 20% of debt Cash flow or debt not reported. Not assessable.
  • Operating profit covers interest at least five times over Interest not separately reported. Not assessable.

From Quantum-si Inc's latest balance sheet as filed. Checks are fixed, documented rules (methodology), counted only where the company reports the figures — a dot means the filing doesn't break the item out. Descriptions of reported data, not advice.

Dividends, buybacks and capital spending

Diluted share count
+31.2%
year over year
R&D spending
3435.5%
of revenue
Sales & admin spending
2529.2%
of revenue
Days sales outstanding
13 days
receivables vs revenue

Competitors: side by side with peers

Closest by revenue in life sciences tools & services
Last 12 months unless stated QSI BGLC YDES ISPC SEER BNGO Median
Revenue, last 12 months $2m $3m $596817 $466302 $14m $30m $229m
Revenue growth, last 12 months −53.0% −67.3% 16.9% −92.1% −12.7% 10.0% 6.9%
Revenue growth, 3-year average 51.8% −32.9% — −64.1% −5.1% −1.4% 2.9%
Revenue growth, latest quarter −41.8% −96.6% — −78.7% −23.4% 21.4% 8.5%
Gross margin 35.0% 12.3% 28.1% −98.0% 47.7% 47.5% 51.9%
Operating margin <−999% −81.8% −883.3% <−999% −498.2% −106.7% −14.3%
Operating margin, 3-year average <−999% −45.3% — −768.0% −575.4% −293.0% −22.4%
Net margin <−999% −82.4% <−999% <−999% −478.0% −106.6% −16.1%
Cash from operations / revenue <−999% −27.1% <−999% <−999% −305.1% −67.9% 1.3%
Free-cash-flow margin <−999% −27.3% <−999% <−999% −311.1% −67.9% −2.2%
Free-cash-flow margin, 3-year average <−999% −29.5% — −549.8% −335.4% −150.1% 0.6%
Stock pay / revenue 693.5% — 75.1% 1.0% 74.3% 11.6% 4.4%
Change in share count 31.2% — 3.1% — 0.2% — 1.0%

Median of all 54 companies we cover in life sciences tools & services. Shaded: best of the six on that line (lowest for stock pay and share-count growth). 3-year figures average the last three 12-month periods; 3-year growth is compound annual. Source: SEC filings.

Peer comparison

54 life sciences tools & services companies
Measure Company Peer median Rank
Revenue growth Growth -53.0% 6.9% 52 of 54
Change in growth rate Growth -6.8pp +0.4pp 48 of 54
Gross margin Profitability 35.0% 52.0% 35 of 45
Operating margin Profitability -6887.8% -14.3% 51 of 52
Net margin Profitability -6138.3% -12.2% 53 of 54
Free-cash-flow margin Cash generation -5837.3% -1.3% 53 of 54
Stock pay as % of revenue Cash generation 693.5% 4.4% 53 of 53
Change in share count Balance sheet 31.2% 1.0% 45 of 46
Days sales outstanding Balance sheet 13 days 62 days 1 of 48

Rank 1 = best in the group (for spending, debt and dilution, lower ranks first).

Where the revenue comes from

Fiscal year to December 31, 2025
Products and services
Line of business Revenue Share YoY
Products $2.3M 93.8% ▼ 21.8%
Services $150,000 6.2% ▲ 12.8%
Geography
Region Revenue Share YoY
Outside the US $1.7M 71.3% ▼ 4.7%
United States $699,000 28.7% ▼ 43.4%

From Quantum-si Inc's 10-K filed March 3, 2026, as tagged in the filing. View filing. Indented rows are part of the line above; their share is of that line. In the bars, the faint bar behind is the year before.

Who owns it

Funds buying and selling
Reported value
$46.8M
Institutions reporting
141
Shares held vs prior quarter
▼ 16.2%
Positions opened / closed
28 / 41

Top buyers and sellers, Q2 2026: 63 institutions bought and 98 sold ; the biggest buyer was Millennium Management LLC (+3.1M shares) and the biggest seller Blackrock, Inc (−8.2M). See which funds bought and sold →

Largest reported holders, June 30, 2026
Manager Value Shares Share of 13F value Shares QoQ
Vanguard Capital Management LLC $6.7M 7.6M 14.3% ▲ 7.9%
ARK Investment Management LLC $6.3M 7.2M 13.5% ▲ 4.2%
Blackrock, Inc. $4.6M 5.2M 9.9% ▼ 61.0%
Amova Asset Management Americas, Inc. $3.5M 3.9M 7.4% ▼ 11.5%
Sumitomo Mitsui Trust Group, Inc. $3.4M 3.9M 7.3% ▼ 11.5%
Millennium Management LLC $2.8M 3.1M 5.9% New
UBS Group AG $2.3M 2.6M 4.8% ▲ 50.5%
AQR Capital Management LLC $2.1M 2.3M 4.4% ▼ 1.8%
Geode Capital Management, LLC $2M 2.2M 4.2% ▼ 41.7%
Jane Street Group, LLC $1.9M 2.1M 4.1% New
Susquehanna International Group, LLP $988,324 1.1M 2.1% ▼ 23.7%
Vanguard Fiduciary Trust Co $988,264 1.1M 2.1% ▼ 0.1%

From Form 13F filings with the SEC ( quarterly data sets), as reported by each manager for June 30, 2026 and filed up to 45 days later. 13F reports cover long US-listed positions of managers above $100M only, so this is not Quantum-si Inc's complete shareholder register. Values are as reported by the filers .

Insider trading activity

Full insider history and chart
Insider purchases History → $564,396 2 trades by 2 insiders, last 12 months Insider sales History → $494,744 30 trades by 4 insiders · 0% under pre-set plans
Net ▲ $69,652 net buying
Insider Date Trade Shares Price Value
Lapointe Christian GC & Corp. Secretary September 22, 2026 Sell 4,721 $0.76 $3,588
Keyes Jeffry R. Chief Financial Officer September 22, 2026 Sell 2,493 $0.76 $1,895
Hawkins Jeffrey Alan President & CEO September 22, 2026 Sell 9,709 $0.76 $7,379
Lapointe Christian GC & Corp. Secretary September 21, 2026 Sell 9,795 $0.76 $7,444
Keyes Jeffry R. Chief Financial Officer September 21, 2026 Sell 5,172 $0.76 $3,931
Hawkins Jeffrey Alan President & CEO September 21, 2026 Sell 20,143 $0.76 $15,309
Hawkins Jeffrey Alan President & CEO June 23, 2026 Sell 11,311 $0.90 $10,180
Vieceli John S. Chief Product Officer June 23, 2026 Sell 15,112 $0.90 $13,601
Keyes Jeffry R. Chief Financial Officer June 23, 2026 Sell 4,117 $0.90 $3,705
Lapointe Christian GC & Corp. Secretary June 23, 2026 Sell 7,794 $0.90 $7,015
Hawkins Jeffrey Alan President & CEO June 22, 2026 Sell 11,310 $0.96 $10,858
Vieceli John S. Chief Product Officer June 22, 2026 Sell 15,111 $0.96 $14,507

From insiders' Form 4 filings with the SEC. Excludes awards, option exercises and shares withheld for tax. "Pre-set plan" means the filing marks the trade as made under a Rule 10b5-1 plan. See every insider trade since five years ago, on a price chart.

Earnings dates and SEC filings

Results announcements

Next expected around November 4, 2026 estimated from the company's past filing pattern, not announced

  • August 13, 2026
  • May 7, 2026
  • March 3, 2026
  • November 5, 2025
  • August 5, 2025
  • May 15, 2025

Recent SEC filings

Data status

When each part of this page on Quantum-si Inc was last updated.

DataLast updatedSource
Share priceExchange closing prices
Financial statementsSEC 10-K and 10-Q filings
News and updatesCompany releases and SEC 8-K filings
Analyst estimatesAggregated analyst estimates
Valuation and scoresOur models, from the filed figures

How we build and check these figures: methodology and data sources.

Quantum-si Inc in brief

What does Quantum-si Inc do?
Quantum-si Inc is a US-listed company in the life sciences tools & services industry. Its financial year ends in December.
What is Quantum-si Inc's stock ticker?
Quantum-si Inc trades under the ticker QSI on Nasdaq. This page brings together its financial statements, valuation models, ownership and recent company updates.
What is Quantum-si Inc's revenue, and how fast is it growing?
Over its most recent trailing twelve months, Quantum-si Inc reported revenue of $1.6M, 53.0% lower than a year earlier, according to its SEC filings.
What is Quantum-si Inc's free cash flow?
Quantum-si Inc's free-cash-flow margin is -5837.3% of revenue over the trailing twelve months, ranking 53 of the 54 life sciences tools & services companies we cover.
Who are Quantum-si Inc's largest institutional shareholders?
By value reported in 13F filings for June 30, 2026, the largest reported holders are Vanguard Capital Management LLC, ARK Investment Management LLC and Blackrock, Inc. 13F reports cover long US-listed positions of managers above $100M, filed up to 45 days after quarter end.
What is Quantum-si Inc's market cap?
On November 2, 2026, Quantum-si Inc's market capitalisation was about $271M and net debt of -$23.7M. Market figures come from third-party market data and may be delayed.
Who are Quantum-si Inc's competitors?
In our Life Sciences Tools & Services peer group, the companies closest to Quantum-si Inc are Bionexus Gene Lab Corp, YD Bio Ltd, Ispecimen Inc., Seer, Inc. and Bionano Genomics, Inc. The side-by-side comparison below sets their revenue, margins and growth against Quantum-si Inc's.
Are insiders buying or selling Quantum-si Inc stock?
Over the last 12 months, Quantum-si Inc's directors and officers reported 2 open-market purchases and 30 sales on Form 4. The insider trading page charts every trade.
When is Quantum-si Inc's next earnings date?
Around November 5, 2026, estimated from the spacing of its past results announcements (8-K filings). That is an estimate, not a confirmed date — Quantum-si Inc announces its own schedule.