Quantum-Si incorporated

QSI·NasdaqGM·Healthcare
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1.2900−0.0100 (−0.77%)today
At close: Nov 4, 4:00 PM EST · May be delayed up to 15 min · USD
Pre-market1.3099+0.0199 (+1.54%)

Prices may be delayed up to 15 min. Not investment advice. News volume: articles in the 4Search index each day.

Key statistics

Previous close1.3000
Open1.3100
Day range1.21001.3300
52-week range0.69001.8100
Off day high−3.01%
Off 52-week high−28.73%
Volume6.31M
Avg. volume (3M)6.29M
Market cap282.36M
EPS (TTM)-0.4500
Forward P/E-3.69
P/E ratio (TTM)—
Dividend yield—
Beta (5Y)3.25
Shares outstanding198.95M
Short interest7.41% of float
Earnings dateNov 5, 2026
Analyst target2.2833
Profit margin0.00%

Against its peers

Compare in full ›
QSI PACB LAB QTRX ALMR TXG
Market cap 282.36M 792.62M 243.14M 143.77M 1.90B 8.80B
P/E (TTM) — — — — — —
Forward P/E -3.7 -6.1 -61.6 -2.2 -65.9 880.7
Price/book 1.6 141.7 0.4 0.6 6.2 10.7
Dividend yield — — — — — —
1-year change −21.82% +43.26% −44.64% −39.08% +24.50% +419.38%
Today −0.77% +4.51% +0.85% +3.40% −9.36% +3.42%

The closest companies by business and industry (Medical Devices). Prices may be delayed up to 15 min.

Related companies

Compare ›

The businesses closest to Quantum-Si's by what they do, from their descriptions, with the same industry weighted in.

Company Mkt cap Price Today
Pacific Biosciences of California, Inc.PACB · Medical Devices 792.62M 2.5500 +4.51%
Standard BioTools Inc.LAB · Medical Devices 243.14M 0.6160 +0.85%
Quanterix CorporationQTRX · Medical Devices 143.77M 3.0400 +3.40%
Alamar Biosciences, Inc.ALMR · Medical Devices 1.90B 27.39 −9.36%
10x Genomics, Inc.TXG · Medical Devices 8.80B 67.52 +3.42%
Novacyt S.A.NCYT.L · Medical Devices 25.58M 35.27 −1.49%
Seer, Inc.SEER · Biotechnology 94.13M 1.7000 −1.73%
Nautilus Biotechnology, Inc.NAUT · Biotechnology 291.68M 2.2900 −2.55%

Other companies in Medical Devices, closest in size first.

Company Mkt cap Price Today
ClearPoint Neuro, Inc.CLPT · Solana Beach, CA 325.67M 10.16 +4.63%
Carvolix SA0JZ.F · Aix-en-Provence, France 328.56M 5.28 −0.38%
Mobia Medical, Inc.MOBI · Austin, TX 374.19M 11.24 +12.74%
Broncus Holding Corporation2216.HK · Hangzhou, China 297.80M 0.565 −0.88%
NIOX Group Plc82C.F · Oxford, United Kingdom 303.93M 0.7500 +2.04%
Austar Lifesciences Limited6118.HK · Shanghai, China 274.23M 0.535 +0.94%
Orthofix Medical Inc.OFIX · Lewisville, TX 392.90M 9.72 +10.96%
CapsoVision, Inc.CV · Saratoga, CA 364.49M 6.85 +2.24%

Also based in Branford, Connecticut, then elsewhere in Connecticut.

Company Mkt cap Price Today
Sachem Capital Corp.SACH · Branford, CT 39.42M 0.8220 +1.48%
Azitra, Inc.AZTR · Branford, CT 4.94M 0.8157 −7.71%
Booking Holdings Inc.BKNG · Norwalk, CT 128.46B 170.97 +9.83%
Philip Morris International Inc.PM · Stamford, CT 329.30B 211.28 +1.56%
Amphenol CorporationAPH · Wallingford, CT 195.10B 79.01 −6.15%
Interactive Brokers Group, Inc.IBKR · Greenwich, CT 132.69B 77.88 +0.54%
The Cigna GroupCI · Bloomfield, CT 80.70B 305.41 +3.37%
United Rentals, Inc.URI · Stamford, CT 69.58B 1,123.79 −4.37%

The stocks whose daily moves over the past year went most closely with Quantum-Si's: the correlation of their daily returns, where 1 would be moving as one.

Company Mkt cap Price Today
Quantum Computing Inc.QUBT · Correlation 0.54Odds 1.46B 6.43 0.00%
Pacific Biosciences of California, Inc.PACB · Correlation 0.49 792.62M 2.5500 +4.51%
KULR Technology Group, Inc.KULR · Correlation 0.49 75.44M 1.6300 −0.61%
SEALSQ CorpLAES · Correlation 0.48 321.65M 1.4300 +4.38%
Arqit Quantum Inc.ARQQ · Correlation 0.47 241.37M 13.87 −7.53%
Quantum CorporationQMCO · Correlation 0.43 660.91M 16.77 −5.09%
Interactive Brokers Group, Inc.IBKR · Correlation 0.42 132.69B 77.88 +0.54%
Nautilus Biotechnology, Inc.NAUT · Correlation 0.37 291.68M 2.2900 −2.55%

What visitors to Quantum-Si's page also look at.

Company Mkt cap Price Today
Quantum CorporationQMCO 660.91M 16.77 −5.09%
SEALSQ CorpLAES 321.65M 1.4300 +4.38%
Arqit Quantum Inc.ARQQ 241.37M 13.87 −7.53%
KULR Technology Group, Inc.KULR 75.44M 1.6300 −0.61%
Quantum Computing Inc.QUBTOdds 1.46B 6.43 0.00%

From the 4SEARCH.business instruments index: what each company does (its business description), its industry, size, headquarters and the markets it serves; and from a year of daily prices, which move together. Prices may be delayed up to 20 min.

Latest news

All QSI news ›
Defense World··3 outletsPositive

Quantum-Si (NASDAQ:QSI) Upgraded to “Hold” at Wall Street Zen

Posted by Defense World Staff on Oct 27th, 2026 Quantum-Si (NASDAQ:QSI – Get Free Report) was upgraded by Wall Street Zen from a “sell” rating to a “hold” rating in a note issued to investors on Tuesday, Wall Street Zen reports. View Our…

QSIQUBTQS
More from 2 other outlets
StocksToTrade·Positive

QSI Stock Holds Key Level As Proteus Milestones Pile Up

Quantum-Si Incorporated stocks have been trading up by 9.63 percent amid upbeat sentiment on its next-generation protein sequencing platform. QSI is still a development-stage name, and the numbers show it clearly. Quantum-Si booked just…

QSIQS
The Globe and Mail··5 outletsNegative

Quantum-Si Regains Nasdaq Compliance After Bid Price Recovery

Quantum-Si ( (QSI) ) has shared an update. On July 23, 2026, Quantum-Si received notice from Nasdaq that its Class A common stock had closed below $1.00 per share for 30 consecutive business days, putting the company out of compliance with…

IONQQSIQBTSQUBT
More from 4 other outlets
Investing News Network (INN)··2 outletsPositive

Quantum-Si to Provide a Business Update and Report Third Quarter 2026 Financial Results on November 5, 2026

Investing News Network Quantum-Si to Provide a Business Update and Report Third Quarter 2026 Financial Results on November 5, 2026 X4b6ajAkULmcAXMAiF8sTOie422Tw_RKjJfrFHbByQ8SkHuhXZT8feSF361H

QBTSIONQMSFTQUBT
More from 1 other outlet

From the 4Search news index, newest first.

In the news

30mentions in 30 days
28with it in the headline
Positivesentiment

Mentioned with

Nvidia18Quantum Computing17Google16Quantumscape16Quantumscape Corporation16Powerco15Volkswagen15Microsoft13

People in the coverage

Rigetti21David Prior20Ewan Scott18Kim Johansen16Danessa Lincoln14Kevin Hettrich14

Themes

Ionq18Economy & Business16Quantum Computing16Qbts11Healthcare9Rgti9Nasdaq7SEC Filings7

Most coverage from

  1. marketscreener.com6
  2. stocktitan.net4
  3. defenseworld.net3
  4. investingnews.com3
  5. cmcmarkets.com2

Finance and business coverage in the 4SEARCH.business news index: articles that name it in the headline, or in the text beside its ticker. Sentiment is the index's own reading of the latest 30 articles, not a forecast.

Market data is provided for information only and comes from free public sources. Prices may be delayed up to 15 minutes; data may be incomplete or inaccurate. Nothing on this page is investment advice or a recommendation to buy or sell any security. News and coverage analytics are drawn from the 4SEARCH.business index. Terms of use. How to use Finance