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CompanyCurrent Price50-Day Moving Average52-Week RangeMarket CapBetaAvg. VolumeToday's Volume
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
$1.22
-3.9%		$1.13
$0.69
▼
$1.81
$277.98M3.267.91 million shs5.47 million shs
The Infrastructure's Backbone: 10 Stocks Powering the AI Buildout Cover
The Infrastructure's Backbone: 10 Stocks Powering the AI Buildout

The AI boom extends far beyond the biggest tech names. Discover 10 companies supplying the memory, storage, networking, semiconductor manufacturing, and power infrastructure that make AI possible. Learn where the next wave of AI investment opportunities may emerge—and the key risks investors should watch as the global AI buildout accelerates.

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Compare Price Performance

Company1-Day Performance7-Day Performance30-Day Performance90-Day Performance1-Year Performance
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
-3.94%+4.27%-13.48%+64.91%-19.74%
CompanyCurrent Price50-Day Moving Average52-Week RangeMarket CapBetaAvg. VolumeToday's Volume
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
$1.22
-3.9%		$1.13
$0.69
▼
$1.81
$277.98M3.267.91 million shs5.47 million shs
The Infrastructure's Backbone: 10 Stocks Powering the AI Buildout Cover
The Infrastructure's Backbone: 10 Stocks Powering the AI Buildout

The AI boom extends far beyond the biggest tech names. Discover 10 companies supplying the memory, storage, networking, semiconductor manufacturing, and power infrastructure that make AI possible. Learn where the next wave of AI investment opportunities may emerge—and the key risks investors should watch as the global AI buildout accelerates.

Get This Free Report

Compare Price Performance

Company1-Day Performance7-Day Performance30-Day Performance90-Day Performance1-Year Performance
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
-3.94%+4.27%-13.48%+64.91%-19.74%
CompanyConsensus Rating ScoreConsensus RatingConsensus Price Target% Upside from Current Price
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
2.40
Hold$2.50104.92% Upside

Current Analyst Ratings Breakdown

Latest QSI Analyst Ratings

DateCompanyBrokerageActionRatingPrice TargetDetails
11/12/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
HC Wainwright logo
HC Wainwright
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Reiterated RatingBuy
11/12/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
UBS Group AG logo
UBS Group
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Reiterated RatingBuy
10/9/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
HC Wainwright logo
HC Wainwright
Subscribe to MarketBeat All Access to unlock brokerage rankings
Set Price Target$4.00
9/29/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
HC Wainwright logo
HC Wainwright
Subscribe to MarketBeat All Access to unlock brokerage rankings
Reiterated RatingBuy$4.00
9/24/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
Weiss Ratings logo
Weiss Ratings
Subscribe to MarketBeat All Access to unlock brokerage rankings
UpgradeSell (E+) ➝ Sell (D-)
9/9/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
Weiss Ratings logo
Weiss Ratings
Subscribe to MarketBeat All Access to unlock brokerage rankings
DowngradeSell (D-) ➝ Sell (E+)
8/25/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
Weiss Ratings logo
Weiss Ratings
Subscribe to MarketBeat All Access to unlock brokerage rankings
UpgradeSell (E+) ➝ Sell (D-)
8/14/2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
Alliance Global Partners logo
Alliance Global Partners
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Reiterated RatingBuy
(Data available from 11/13/2023 forward. View 10+ years of historical ratings with our analyst ratings screener.)
CompanyAnnual RevenuePrice/SalesCashflowPrice/CashBook ValuePrice/Book
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
$2.44M109.44N/AN/A$0.73 per share1.67
CompanyNet IncomeEPSTrailing P/E RatioForward P/E RatioP/E GrowthNet MarginsReturn on Equity (ROE)Return on Assets (ROA)Next Earnings Date
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
-$101.34M-$0.39N/AN/AN/A-6,729.80%-44.72%-41.26%N/A

Latest QSI Earnings

DateQuarterCompanyConsensus EstimateReported EPSBeat/MissGap EPSRevenue EstimateActual RevenueDetails
11/5/2026Q3 2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
-$0.1209-$0.10+$0.0209-$0.10$0.27 million$0.21 million
8/13/2026Q2 2026
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
-$0.1133-$0.11+$0.0033-$0.11$0.30 million$0.34 million
CompanyAnnual PayoutDividend Yield5-Year Annualized Dividend GrowthPayout RatioYears of Consecutive Growth
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
N/AN/AN/AN/AN/A
CompanyDebt-to-Equity RatioCurrent RatioQuick Ratio
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
N/A
9.64
9.80

Institutional Ownership

CompanyInstitutional Ownership
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
39.90%

Insider Ownership

CompanyInsider Ownership
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
22.04%
CompanyEmployeesShares OutstandingFree FloatOptionable
Quantum-Si Incorporated stock logo
QSI
Quantum-Si
145218.88 million170.64 millionOptionable

Recent News About These Companies

Quantum-Si Incorporated (QSI) - What Are Investment Firms Thinking About This Stock?
November 12 at 12:13 PM  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/consensus-quantum-si-incorporated-qsi-what-are-investment-firms-thinking-about-this-stock-2026-11-12/
Quantum-Si (QSI) Receives a Hold from Canaccord Genuity
November 7, 2026  |  theglobeandmail.comhttps://www.theglobeandmail.com/investing/markets/stocks/QSI/pressreleases/8717414/quantum-si-qsi-receives-a-hold-from-canaccord-genuity/
Quantum-Si (NASDAQ:QSI) Posts Quarterly Earnings Results, Beats Expectations By $0.02 EPS
November 6, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/earnings-quantum-si-nasdaq-qsi-posts-quarterly-earnings-results-beats-expectations-by-002-eps-2026-11-06/
Quantum-Si Inc (QSI) Q3 2026 Earnings Call Highlights: Proteus Launch on Track for Q2 2027 ...
November 6, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/healthcare/articles/quantum-si-inc-qsi-q3-052548684.html
Quantum-Si (QSI) Q3 2026 Earnings Call Transcript
November 6, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/markets/stocks/articles/quantum-si-qsi-q3-2026-081302794.html
Quantum-Si Q3 Earnings Call Highlights
November 5, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/transcript-quantum-si-q3-earnings-call-highlights-2026-11-05/
Quantum-Si incorporated (QSI) Q3 2026 Earnings Call Transcript
November 5, 2026  |  seekingalpha.comhttps://seekingalpha.com/article/4963717-quantum-si-incorporated-qsi-q3-2026-earnings-call-transcript
Quantum-Si outlines Proteus launch in Q2 2027 while lowering 2026 adjusted OpEx guidance to $87M or less
November 5, 2026  |  seekingalpha.comhttps://seekingalpha.com/news/4667693-quantum-si-outlines-proteus-launch-in-q2-2027-while-lowering-2026-adjusted-opex-guidance-to
Quantum-Si Incorporated (QSI) Reports Q3 Loss, Misses Revenue Estimates
November 5, 2026  |  zacks.comhttps://www.zacks.com/stock/news/3025105/quantum-si-incorporated-qsi-reports-q3-loss-misses-revenue-estimates?cid=cs-stocknewsapi-ft-fundamental_analysis|yseop_template_4-3025105
Quantum-Si Reports Third Quarter 2026 Financial Results and Provides Business Update
November 5, 2026  |  globenewswire.comhttps://www.globenewswire.com/news-release/2026/11/05/3397053/0/en/quantum-si-reports-third-quarter-2026-financial-results-and-provides-business-update.html
Earnings To Watch: Quantum-Si Inc (QSI) Q3 2026 -- GF Value Sees 45% Downside
November 4, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/markets/stocks/articles/earnings-watch-quantum-si-inc-130816991.html
Quantum-Si stock sets November 5 date for results and business update
October 29, 2026  |  ad-hoc-news.deA
Quantum-Si (QSI) Set to Release Earnings on Thursday
October 29, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/upcoming-quantum-si-qsi-set-to-release-earnings-on-thursday-2026-10-29/
Quantum-Si (NASDAQ:QSI) Upgraded to "Hold" at Wall Street Zen
October 27, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/analyst-quantum-si-nasdaq-qsi-upgraded-to-hold-at-wall-street-zen-2026-10-27/
Why Quantum-Si incorporated’s (QSI) Stock Is Up 10.09%
October 20, 2026  |  aaii.comA
Quantum-Si (NASDAQ:QSI) Stock Gets Downgrade from Wall Street Zen
October 19, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/analyst-quantum-si-nasdaq-qsi-stock-gets-downgrade-from-wall-street-zen-2026-10-19/
Quantum-Si Incorporated to Report Third Quarter 2026 Financial Results and Provide Business Update on November 5
October 16, 2026  |  quiverquant.comQ
Quantum-Si to Provide a Business Update and Report Third Quarter 2026 Financial Results on November 5, 2026
October 16, 2026  |  globenewswire.comhttps://www.globenewswire.com/news-release/2026/10/16/3382536/0/en/quantum-si-to-provide-a-business-update-and-report-third-quarter-2026-financial-results-on-november-5-2026.html
Quantum-Si regains Nasdaq compliance, and Quantum-Si stock stays listed
October 15, 2026  |  ad-hoc-news.deA
Quantum-Si Regains Compliance With Nasdaq's Minimum Bid Price Requirement
October 15, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/markets/stocks/articles/quantum-si-regains-compliance-nasdaq-135814223.html
Quantum-Si Regains Compliance with Nasdaq Minimum Bid Price Requirement
October 15, 2026  |  globenewswire.comhttps://www.globenewswire.com/news-release/2026/10/15/3381687/0/en/quantum-si-regains-compliance-with-nasdaq-minimum-bid-price-requirement.html

New MarketBeat Followers Over Time

Media Sentiment Over Time

Quantum-Si stock logo

Quantum-Si NASDAQ:QSI

$1.22 -0.05 (-3.94%)
Closing price 11/12/2026 04:00 PM Eastern
Extended Trading
$1.24 +0.02 (+1.64%)
As of 07:04 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.

Quantum-Si incorporated, a life sciences company, engages in the development of single-molecule detection platform to enable Next Generation Protein Sequencing (NGPS). The company's platform is comprised of the Platinum NGPS instrument; the Platinum Analysis Software service; and reagent kits and semiconductor chips for use with its instruments. It is used in protein identification, protein variants, antibody characterization, biomarker identification, and post translational modification analysis applications. The company was founded in 2013 is headquartered in Branford, Connecticut.

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