0.7825

1.71% 0.0124

Quantum Si Incorporated (QSI)

Overview News Price History Option Chain Financials Discussions Forecast

Quantum Si Incorporated stock is traded at $0.7825, with a volume of 211.37K. It is up +1.71% in the last 24 hours and down -8.36% 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.

Previous Close:

$0.7701

Open:

$0.7884

24h Volume:

211.37K

Relative Volume:

0.04

Market Cap:

$170.40M

Revenue:

$1.85M

Net Income/Loss:

$-103.82M

P/E Ratio:

-1.528

EPS:

-0.5121

Net Cash Flow:

$-95.69M

1W Performance:

-4.12%

1M Performance:

-8.36%

6M Performance:

-36.32%

1Y Performance:

-59.41%

1-Day Range:

$0.78

$0.8097

1-Week Range:

$0.7608

$0.8498

52-Week Range:

$0.6912

$3.10

Quantum Si Incorporated Stock (QSI) Company Profile

Name

Quantum Si Incorporated

Sector

Healthcare (1081)

Industry

Medical Devices (140)

Phone

(203) 458-7100

Address

29 BUSINESS PARK DRIVE, BRANFORD

Employee

145

Twitter

Next Earnings Date

2026-08-04

Latest SEC Filings

QSI's Discussions on Twitter

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

Stocks	Price	Market Cap	Revenue	Net Income	Cash Flow	EPS
QSI Quantum Si Incorporated	0.7825	167.70M	1.85M	-103.82M	-95.69M	-0.5121
ABT Abbott Laboratories	104.82	179.51B	46.59B	5.41B	7.38B	3.0938
SYK Stryker Corp	336.98	126.60B	25.27B	3.34B	4.57B	8.6334
MDT Medtronic Plc	84.83	106.51B	36.36B	4.84B	5.43B	3.7261
BSX Boston Scientific Corp	46.05	65.77B	20.62B	3.56B	3.48B	2.3847
EW Edwards Lifesciences Corp	82.25	47.58B	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

03:39 AM

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

03:39 AM

Jul 25, 2026

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

Jul 25, 2026

Jul 24, 2026

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

Jul 24, 2026

Quantum-Si Faces Nasdaq Noncompliance, Delisting Risk Looms - TipRanks

Jul 24, 2026

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

Jul 24, 2026

Jul 06, 2026

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

Jul 06, 2026

Quantum-Si (QSI) Edges Higher Near Key Resistance: A Look at Protein Sequencing Stock's Recent MovePCR Extreme - dars.gov.et

Jul 06, 2026

Jul 03, 2026

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

Jul 03, 2026

Jul 02, 2026

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

Jul 02, 2026

Jun 27, 2026

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

Jun 27, 2026

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

Jun 27, 2026

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

Jun 27, 2026

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

Jun 25, 2026

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

Jun 25, 2026

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

Jun 25, 2026

Jun 24, 2026

Form 144 Quantum-Si Inc For: 24 June By Investing.com - Investing.com Australia

Jun 24, 2026

Quantum-Si CPO John Vieceli sells $28,052 in stock By Investing.com - Investing.com Nigeria

Jun 24, 2026

Quantum-Si CPO John Vieceli sells $28,052 in stock - Investing.com

Jun 24, 2026

Quantum-Si (QSI) CPO sells 30,223 shares to cover RSU tax withholding - Stock Titan

Jun 24, 2026

Quantum-Si (QSI) CFO offloads 8,233 shares in mandatory tax sell-to-cover - Stock Titan

Jun 24, 2026

Quantum-Si (NASDAQ: QSI) files sale notice for 21,676 Class A shares - Stock Titan

Jun 24, 2026

Quantum-Si Q1 earnings call highlights - MSN

Jun 24, 2026

Quantum-Si Enters Long-Term San Diego Facility Lease - TipRanks

Jun 24, 2026

Quantum-Si (QSI) signs 10-year San Diego lab and manufacturing lease - Stock Titan

Jun 24, 2026

Quantum-Si Inc Enters into Lease Agreement for New Office, Laboratory, and Manufacturing Space in San Diego - marketscreener.com

Jun 24, 2026

Jun 22, 2026

Quantum-Si (QSI) Holds Near $1 Level as Selling Pressure Eases SlightlySell Signal Alerts - dars.gov.et

Jun 22, 2026

Jun 21, 2026

Quantum-Si (QSI) Q4 2024 earnings summary - Quartr

Jun 21, 2026

Jun 17, 2026

Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)June 16, 2026 - BioSpace

Jun 17, 2026

Jun 15, 2026

Quantum-Si Warrant (QSIAW) Stagnates Near Penny Levels Amid Minimal ActivityTrend Following Picks - dars.gov.et

Jun 15, 2026

Jun 14, 2026