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Quantum-Si (QSI) stock

Market cap $313M

$1.55
+8.39%

Market closed. Prices as of today's close.

Quality Score
0
Below Average
In its industry
#5of 6
Measuring Devices

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Why QSI is up

Quantum-Si rose 33.6% on Oct 1.

Measuring & Controlling Devices stocks rose a median 1.6% and the S&P 500 rose 0.2% that day; Quantum-Si rose 33.6%.

Sources: Price history, Oct 1, 2026

1 more driver and the timeline, for Pro members

Quality Score

Why QSI scores 0

Below AverageTrending down, 6 of 14 checks firingWhat the Quality Score means

Poor is below 0. Average starts at 6, Above Average at 11, Excellent at 15, and Exceptional at 20.

  • +6Chart checks 6 of 14 firing right now, one point each
  • −3Insider trades The CEO is selling into the 52-⁠week low: Jeffrey Alan Hawkins (President & CEO) sold $7K on Sep 22, and 5 more filings
  • Long-term trend adds
  • Run-up adds
  • Profit subtractsRead on the last four quarters against the four before, or the last full year where no quarters are filed.
  • Growth subtractsSales and margins against a year earlier: up to +3 for fast growth and widening margins, down to -2 when both shrink.
  • Dilution subtractsNew shares over the year: -1 at 10% more, -2 at 25% more.
  • Volatility subtractsA daily range of 5% or more with nothing behind it (no profit or cash flow, sales shrinking, or 10% more shares outstanding with no free cash flow): -1, or -2 from 8%.
  • Cash flow subtracts-1 when free cash flow over the last four quarters is negative.

No effect today: Size, Persistence, and News.

What every line is worth, and the reason behind it, on QSI and every other stock.Get in free →

Price, score, chart checks, and the industry rank are from a snapshot taken at 8:46 PM ET, at least 15 minutes behind. How we rank stocks.

What's next

Wed Oct 14: Quantum-Si Incorporated Proteus roadshowIndustry event · date confirmed.

Expected to report Thu Nov 5, after the close

3 more dates ahead for Pro members: conferences

What would turn QSI's score around: 8 things, for Pro members

Alert me when QSI's Quality Score turns up

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Pro

Here is what Pro members see.

Every stock has a live page like this, QSI included: the price in real time, the full chart, all 14 checks, and every line of its score.

AMD's page for Pro members on a phone, recorded live: the price changes as it trades, beside its Quality Score and its rank, with the bid and ask under it and a year of candles below
The same page for Pro members, on AMDThe live price and the full chart, with the Quality Score drawn under it and the line that drives it.
The Score tab on a phone: how AMD's Quality Score adds up from price action, the company, and signals, its rank, and the chart checks by group, trend, volume, tight range, and buying
Every line of the scoreWhat each part adds, and all 14 checks by group, on QSI and every other stock.
The New alert form on a phone: watch one name, AMD, when its Quality Score is at least 20, sent by the bell on the site, a push notification, and email, with the Save alert button
Your own optional alertsPick what to watch, QSI or your whole watchlist, and when: a Quality Score, a price, a filing. It comes by push, email, or the bell.
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The 14 checks

QSI has 6 of 14 checks firing

One per group is shown here.

Trend1 of 5 shown
MA FAN21 EMAW.EMAHH/HL52W HI

Averages stacked in order, price near its high.

Volume1 of 3 shown
VOLVDUU/D VOL

Heavy volume on the run, quiet volume at rest.

Tight range1 of 3 shown
ATR SQZSQUEEZENR7

The daily range is tight against its own recent history.

Buying1 of 3 shown
OBV+CLOSE HISPRING

Closes near the high, and buyers step in on dips.

The other 10 checks on QSI, and all 14 on every stock.Get in free →

Also on the chart

Not scored

Shown for reference. None of these counts toward the Quality Score: in our tests on 20 years of daily prices, none of them improved it.

  • RSI 1487.5

    70 or above.

  • MACD (12, 26, 9)Above signal

    Crossed above its signal line 11 sessions ago.

  • 50-day average$0.81

    The price is 91.4% above it.

  • 200-day average$0.95

    The price is 63.2% above it. The 50-day is below the 200-day, since Jan 2.

  • ADX 1436.6

    25 or more, with +DI above -DI.

  • Support$1.26

    Swing low from Dec 3, 2025, 18.7% below the price.

  • Resistance$3.10

    Swing high from Oct 16, 2025, 100.0% above the price.

  • Bollinger Bands (20, 2)Above

    The bands run from $0.40 to $1.31.

  • Volume3.9x

    Against its 20-day average, for the time of day.

Its industry

How QSI ranks in Measuring Devices

QSI is #5 of 6 by Quality Score among Measuring & Controlling Devices. The top three are shown with their scores, and more by name.

  • 1TMOThermo Fisher Scientific15
  • 2ONTOOnto Innovation13
  • 3ROKRockwell Automation11
  • MIRMirion TechnologiesOpen for its score
  • 5QSIQuantum-Si0

More in Measuring Devices, on the Technology page

Earnings

When does QSI report earnings, and what happens after?

Expected to report Thu Nov 5, after the close (in 34 days). Not yet confirmed by the company.

Filings

Who is trading QSI

QSI insider trades

4 insiders sold $111K across 14 filings in the last 6 months. No open-⁠market buys on record. The newest:

SellJeffrey Alan Hawkins$15KPresident & CEOat $0.76 on Sep 21, filed Sep 23
All 14 insider filings on QSI from the last six months, for Pro members.Get in free →

An insider has two business days to file a Form 4, so the trade is already days old when it becomes public. Shown as filed, with no delay.

The company

About Quantum-Si

Quantum-Si Inc is a life sciences company focused on proteomics research and analytical technologies. It develops single-molecule detection platforms designed to enable next-generation protein sequencing (NGPS) and large-scale protein analysis. Its technology supports massively parallel sequencing of proteins and can also be applied to the study of nucleic acids, providing tools for researchers and clinical applications in molecular analysis. The company's revenue is derived from sales of products and services.

145 employeesBranford, CTquantum-si.com

Pro

Every line of the score, on every stock.

  • Real-time prices, no delay
  • Every line of QSI's score, with the points and the reason
  • All 14 checks on QSI and on all 3,243 stocks
  • Every stock ranked, with the chart
  • Every filing, and optional alerts on QSI
BreakawaySep 23Jeffrey Alan Hawkins sold QSI$15K at $0.76, filed Sep 23

What a filing on QSI would have sent. Alerts are optional.

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Questions

Straight Answers.

Are the prices delayed?

Only on the public pages, which run at least 15 minutes behind. Pro members, trial included, see real-time prices: the scanner refreshes every 15 seconds, and your watchlist every few seconds, pre-market and after hours included.

Where does the data come from?

Daily bars, quotes, reference data, headlines, and short interest come from Massive, formerly Polygon, a licensed market data vendor. The age of the quotes is shown at the top of every page. Insider trades, notable holders and profits come straight from the SEC. That means Form 4 filings, 13F filings and XBRL financial data on EDGAR. Government filings come from the public STOCK Act and Office of Government Ethics disclosures. The market-wide headlines on the market line also come from the public headline feeds CNBC, MarketWatch and Yahoo Finance publish, shown as the headline, the source and a link to the article. Splits, dividends, and the financial statements on each ticker page come from the vendor's reference data. The 8-K filings on EDGAR are read for the items that move a price. Five years of history is loaded for every stock. So the 200-day and 52-week checks rest on real history. Options flow is not part of the product.

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Is this investment advice?

No. It is a screening tool that scores stocks on the chart, the company's own results, and the news and filings. It does not know your situation and it is not a recommendation to buy or sell anything. Please do your own research.

The price, the score, the chart checks and readings, and the industry rank on this page are delayed at least 15 minutes. Filings are shown as filed, because a disclosure is already days or weeks old when it becomes public. Earnings dates and past reactions are settled sessions.