0.766
price up icon0.66%   0.005
after-market After Hours: .77 0.004 +0.52%
loading
Quantum Si Incorporated stock is traded at $0.766, with a volume of 894.60K. It is up +0.66% in the last 24 hours and up +0.08% over the past month. 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.
See More
Previous Close:
$0.761
Open:
$0.76
24h Volume:
894.60K
Relative Volume:
0.19
Market Cap:
$167.67M
Revenue:
$1.85M
Net Income/Loss:
$-103.82M
P/E Ratio:
-1.4958
EPS:
-0.5121
Net Cash Flow:
$-95.69M
1W Performance:
-1.79%
1M Performance:
+0.08%
6M Performance:
-15.82%
1Y Performance:
-28.41%
1-Day Range:
Value
$0.76
$0.7742
1-Week Range:
Value
$0.7499
$0.7862
52-Week Range:
Value
$0.69
$3.10

Quantum Si Incorporated Stock (QSI) Company Profile

Name
Name
Quantum Si Incorporated
Name
Phone
(203) 458-7100
Name
Address
29 BUSINESS PARK DRIVE, BRANFORD
Name
Employee
145
Name
Twitter
Name
Next Earnings Date
2026-08-13
Name
Latest SEC Filings
Name
QSI's Discussions on Twitter

Compare QSI vs ABT, MDT, SYK, BSX, EW

Stocks Price Market Cap Revenue Net Income Cash Flow EPS
QSI icon
QSI
Quantum Si Incorporated
0.766 170.73M 1.85M -103.82M -95.69M -0.5121
ABT icon
ABT
Abbott Laboratories
108.33 197.51B 46.59B 5.41B 7.38B 3.0938
MDT icon
MDT
Medtronic Plc
94.17 118.14B 36.36B 4.84B 5.43B 3.7261
SYK icon
SYK
Stryker Corp
303.13 125.70B 25.27B 3.34B 4.57B 8.6334
BSX icon
BSX
Boston Scientific Corp
47.80 71.55B 20.62B 3.56B 3.48B 2.3847
EW icon
EW
Edwards Lifesciences Corp
89.90 51.78B 6.30B 1.07B 1.09B 1.8406

Quantum Si Incorporated Stock (QSI) Upgrades & Downgrades

Date Action Analyst Rating Change
Feb-07-25 Initiated Alliance Global Partners Buy
Dec-08-23 Initiated H.C. Wainwright Buy
Sep-25-23 Downgrade Canaccord Genuity Buy → Hold
Oct-20-21 Initiated Canaccord Genuity Buy

Quantum Si Incorporated Stock (QSI) Latest News

pulisher
Aug 18, 2026

Quantum-Si to Participate in the H.C. Wainwright 28th Annual Global Investment Conference - Investing News Network

Aug 18, 2026
pulisher
Aug 18, 2026

FY2026 EPS Estimates for Quantum-Si Lifted by HC Wainwright - MarketBeat

Aug 18, 2026
pulisher
Aug 17, 2026

Quantum-Si (QSI) Q2 2026 Earnings: Narrower-than-Expected Loss Fails to Stem Share DeclineMargin Improvement Report - Vinanet

Aug 17, 2026
pulisher
Aug 16, 2026

Quantum-Si (QSI) Slides 6.35% to $0.74, Pressuring Key $0.70 Support LevelOverbought Signal Alerts - Vinanet

Aug 16, 2026
pulisher
Aug 14, 2026

Quantum-Si incorporated Q2 2026 Earnings Call Summary - Yahoo Finance

Aug 14, 2026
pulisher
Aug 13, 2026

Quantum-Si Q2 Earnings Call Highlights - MarketBeat

Aug 13, 2026
pulisher
Aug 13, 2026

Quantum-Si Incorporated (QSI) Reports Q2 Loss, Tops Revenue Estimates - Yahoo Finance

Aug 13, 2026
pulisher
Aug 13, 2026

QSI: Proteus launch delayed to Q2 2027, with cost cuts and strong cash position supporting revised plan - TradingView

Aug 13, 2026
pulisher
Aug 13, 2026

Quantum-Si Q2 EPS $(0.11) beats estimate as revenue hits $344k - scanx.trade

Aug 13, 2026
pulisher
Aug 13, 2026

QSI: Proteus launch delayed to Q2 2027; cost cuts extend cash runway and support long-term growth - TradingView

Aug 13, 2026
pulisher
Aug 13, 2026

Quantum-Si (NASDAQ:QSI) Announces Quarterly Earnings Results - MarketBeat

Aug 13, 2026
pulisher
Aug 13, 2026

Quantum-Si Reports Second Quarter 2026 Financial Results and Provides Proteus Development Update - Investing News Network

Aug 13, 2026
pulisher
Aug 13, 2026

Quantum-Si incorporated Reports Earnings Results for the Second Quarter and Six Months Ended June 30, 2026 - marketscreener.com

Aug 13, 2026
pulisher
Aug 13, 2026

Qantum-Si Incorporated Reiterates Earnings Guidance for the Full Year 2026 - marketscreener.com

Aug 13, 2026
pulisher
Aug 13, 2026

Quantum-Si Reports Second Quarter 2026 Financial Results and Provides Proteus™ Development Update - marketscreener.com

Aug 13, 2026
pulisher
Aug 13, 2026

Stock Traders Purchase Large Volume of Call Options on Quantum-Si (NASDAQ:QSI) - MarketBeat

Aug 13, 2026
pulisher
Aug 12, 2026

Quantum-Si Inc (QSI) Q2 2026 Earnings Report Preview: What To Expect - Yahoo Finance

Aug 12, 2026
pulisher
Aug 12, 2026

QSI Q2'26 Earnings: EPS estimate is (0.11) USD - TradingView

Aug 12, 2026
pulisher
Aug 10, 2026

QSI Stock Holds Near $0.81 as Quantum-Si Consolidates Between $0.77 Support and $0.85 ResistanceRevenue Growth Stocks - dars.gov.et

Aug 10, 2026
pulisher
Aug 06, 2026

QSI Q2'26 Earnings: revenue estimate is 302.00K USD - TradingView

Aug 06, 2026
pulisher
Aug 05, 2026

Quantum-Si Warrant (QSIAW) Holds at $0.01 With Flat SessionCharm Flow - dars.gov.et

Aug 05, 2026
pulisher
Jul 28, 2026

Quantum-Si to Report Second Quarter 2026 Financial Results on August 13, 2026 - The Manila Times

Jul 28, 2026
pulisher
Jul 27, 2026

QSI|Quantum-Si Inc|Price:0.780|Chg%:+0.010 - TradingKey

Jul 27, 2026
pulisher
Jul 27, 2026

Quantum-Si sets Aug. 13 call for financial and business update - Stock Titan

Jul 27, 2026
pulisher
Jul 27, 2026

QSI|Quantum-Si Inc|Price:0.814|Chg%:+0.059 - TradingKey

Jul 27, 2026
pulisher
Jul 26, 2026

QSIAW Warrants Trade at Minimal Levels Amidst Low ActivityRSI Overbought Alerts - Vinanet

Jul 26, 2026
pulisher
Jul 25, 2026

Quantum-Si Faces Nasdaq Noncompliance, Delisting Risk Looms - The Globe and Mail

Jul 25, 2026
pulisher
Jul 25, 2026

QSI|Quantum-Si Inc|Price:0.770|Chg%:-0.020 - TradingKey

Jul 25, 2026
pulisher
Jul 25, 2026

Quantum-Si Incorporated Revenue Breakdown – NASDAQ:QSI - TradingView

Jul 25, 2026
pulisher
Jul 24, 2026

Quantum-Si (QSI) Receives Nasdaq Delisting Notice: Key Details from Latest 8-K Filing - Minichart

Jul 24, 2026
pulisher
Jul 24, 2026

Quantum-Si (NASDAQ: QSI) warned on Nasdaq $1.00 bid compliance - Stock Titan

Jul 24, 2026
pulisher
Jul 23, 2026

Quantum-Si Warrant (QSIAW) Flat at $0.01 – A Waiting Game for Warrant HoldersBPI Reversal - vinanet.vn

Jul 23, 2026
pulisher
Jul 20, 2026

QSI Q1 2026 Earnings: Narrower Loss Beats Estimates as Pre-Revenue Biotech AdvancesRetail Earnings Report - vinanet.vn

Jul 20, 2026
pulisher
Jul 18, 2026

Quantum-Si Warrant (QSIAW) Holds at $0.01 in Stalemate – Key Levels UnchangedPrice Target - vinanet.vn

Jul 18, 2026
pulisher
Jul 16, 2026

Quantum-Si Incorporated Warrant (QSIAW) Holds Steady at $0.01 as Trading Remains FlatRegression Channel - vinanet.vn

Jul 16, 2026
pulisher
Jul 15, 2026

Quantum-Si (QSI) Edges Higher Amid Low-Volume Trading, Remains in Downtrend ChannelChange of Character - vinanet.vn

Jul 15, 2026
pulisher
Jul 10, 2026

QSI Q1 2026 Earnings: EPS Beat Fails to Stem Stock Decline Amid Revenue UncertaintyEarnings Surprise Score - dars.gov.et

Jul 10, 2026
pulisher
Jul 06, 2026

QSI Q1 2026 Earnings: EPS Beat as Loss Narrows, Stock RisesCFO Commentary Report - Bölüm Sonu Canavarı

Jul 06, 2026
pulisher
Jul 06, 2026

Quantum-Si (QSI) Edges Higher Near Key Resistance: A Look at Protein Sequencing Stock's Recent MovePre-Earnings Momentum - po-news-eg.net

Jul 06, 2026
pulisher
Jul 04, 2026

QSI Q1 2026 Earnings: EPS Beat Despite Pre-Revenue Stage, Stock Edges HigherProfit Cycle Analysis - po-news-eg.net

Jul 04, 2026
pulisher
Jul 03, 2026

QSI Q1 2026 Earnings: EPS Beat Slightly Narrower Loss Than ExpectedEPS Surprise History - dars.gov.et

Jul 03, 2026
pulisher
Jul 02, 2026

Shareholders Can't Ignore US$614k Of Sales By Quantum-Si Insiders - simplywall.st

Jul 02, 2026
pulisher
Jun 27, 2026

Price to book forward of Quantum-Si Incorporated – NASDAQ:QSI - TradingView

Jun 27, 2026
pulisher
Jun 27, 2026

Enterprise value to EBITDA forward of Quantum-Si Incorporated – NASDAQ:QSI - TradingView

Jun 27, 2026
pulisher
Jun 27, 2026

Enterprise value to EBIT forward of Quantum-Si Incorporated – NASDAQ:QSI - TradingView

Jun 27, 2026
pulisher
Jun 27, 2026

Price to sales forward of Quantum-Si Incorporated – NASDAQ:QSI - TradingView

Jun 27, 2026
pulisher
Jun 26, 2026

Quantum-Si Incorporated Class A Actuals & Estimates (NASDAQ:QSI) - TradingView

Jun 26, 2026
pulisher
Jun 25, 2026

QSI Forecast — Price Target — Prediction for 2027 - TradingView

Jun 25, 2026
pulisher
Jun 25, 2026

Quantum-Si (QSI) CEO Jeffrey Hawkins reports $20,996 stock sale - Investing.com UK

Jun 25, 2026
pulisher
Jun 25, 2026

Quantum-Si (QSI) CEO Jeffrey Hawkins reports $20,996 stock sale By Investing.com - Investing.com Australia

Jun 25, 2026
pulisher
Jun 25, 2026

Form 4 QuantumSi Inc For: 24 June By Investing.com - Investing.com Australia

Jun 25, 2026

Quantum Si Incorporated Stock (QSI) Financials Data

Revenue

loading

Net Income

loading

Cash Flow

loading

EPS

loading

Quantum Si Incorporated Stock (QSI) Insider Trading

Insider Trading Relationship Date Transaction Cost #Shares Value ($) #Shares Total
LaPointe Christian
GC & Corp. Secretary
Jun 23 '26
Sale
0.90
7,794
7,007
1,182,429
Keyes Jeffry R.
Chief Financial Officer
Jun 22 '26
Sale
0.96
4,116
3,941
1,728,466
Keyes Jeffry R.
Chief Financial Officer
Jun 23 '26
Sale
0.90
4,117
3,701
1,724,349
Vieceli John S.
Chief Product Officer
Jun 22 '26
Sale
0.96
15,111
14,467
1,155,546
Vieceli John S.
Chief Product Officer
Jun 23 '26
Sale
0.90
15,112
13,586
1,140,434
Hawkins Jeffrey Alan
President & CEO
Jun 22 '26
Sale
0.96
11,310
10,828
3,681,113
Hawkins Jeffrey Alan
President & CEO
Jun 23 '26
Sale
0.90
11,311
10,169
3,669,802
ZBH ZBH
$98.07
price down icon 0.86%
STE STE
$224.59
price down icon 0.99%
PHG PHG
$25.89
price down icon 0.61%
$68.86
price down icon 1.23%
$87.90
price down icon 2.02%
EW EW
$89.90
price up icon 0.13%
Cap:     |  Volume (24h):