1.06

7.07% 0.07

After Hours: 1.05 -0.01 -0.94%

Quantum Si Incorporated (QSI)

Overview News Price History Option Chain Financials Discussions Forecast

Quantum Si Incorporated stock is traded at $1.06, with a volume of 8.78M. It is up +7.07% in the last 24 hours and up +0.00% 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:

$0.99

Open:

$0.9994

24h Volume:

8.78M

Relative Volume:

1.88

Market Cap:

$230.83M

Revenue:

$2.44M

Net Income/Loss:

$-101.34M

P/E Ratio:

-2.0491

EPS:

-0.5173

Net Cash Flow:

$-97.23M

1W Performance:

+19.09%

1M Performance:

+0.00%

6M Performance:

-16.54%

1Y Performance:

-39.08%

1-Day Range:

$0.9955

$1.09

1-Week Range:

$0.821

$1.09

52-Week Range:

$0.6912

$3.10

Quantum Si Incorporated Stock (QSI) Company Profile

Name

Quantum Si Incorporated

Sector

Healthcare (1108)

Industry

Medical Devices (143)

Phone

(203) 458-7100

Address

29 BUSINESS PARK DRIVE, BRANFORD

Employee

145

Twitter

Next Earnings Date

2026-05-07

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	1.06	215.58M	2.44M	-101.34M	-97.23M	-0.5173
ABT Abbott Laboratories	87.41	152.88B	45.13B	6.28B	7.38B	3.5895
SYK Stryker Corp	316.48	120.18B	25.27B	3.34B	4.57B	8.6334
MDT Medtronic Plc	78.60	100.34B	35.48B	4.64B	5.41B	3.582
BSX Boston Scientific Corp	57.78	84.95B	20.62B	3.56B	3.48B	2.3847
EW Edwards Lifesciences Corp	85.78	47.91B	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

May 22, 2026

QSI Stock Grinds Higher As Proteus Milestones Pile Up - StocksToTrade

May 22, 2026

May 21, 2026

Quantum Cyber N.V. and Other Players Eye Potential CHIPS Act Funding From Trump Administration - TradingView

May 21, 2026

May 20, 2026

Quantum-Si (QSI) director Brigid Makes receives 251,185 stock options grant - Stock Titan

May 20, 2026

Quantum-Si (QSI) director receives 251,185 stock options as equity grant - Stock Titan

May 20, 2026

Director Paula Dowdy receives 251,185 options at Quantum-Si (QSI) - Stock Titan

May 20, 2026

Quantum-Si (QSI) director granted 251,185-share stock option at $0.8539 - Stock Titan

May 20, 2026

Quantum-Si (QSI) director granted 251K options at $0.8539 strike - Stock Titan

May 20, 2026

Quantum-Si (QSI) grants 251K stock options to director Scott Mendel - Stock Titan

May 20, 2026

Quantum-Si (QSI) director awarded 251,185 stock options expiring 2036 - Stock Titan

May 20, 2026

May 19, 2026

QSI: Proteus launches with advanced PTM detection, scalable upgrades, and strong financial backing - TradingView

May 19, 2026

May 15, 2026

Quantum-Si shareholders reelect board, approve auditor and executive pay By Investing.com - Investing.com Nigeria

May 15, 2026

Quantum-Si shareholders reelect board, approve auditor and executive pay - Investing.com

May 15, 2026

Quantum-Si Q1 earnings call highlights - MSN

May 15, 2026

May 14, 2026

Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)May 13, 2026 - BioSpace

May 14, 2026

May 11, 2026

EDGAR Filing Documents for 0001816431-26-000011 - SEC.gov

May 11, 2026

May 09, 2026

Quantum-Si Incorporated 2026 Q1 Financial Report: Revenue, Expenses, and Forward-Looking Statements - Minichart

May 09, 2026

May 08, 2026

Quantum-Si Q1 2026 Earnings: Transition Year with Focus on Proteus PlatformNews and Statistics - IndexBox

May 08, 2026

Quantum-Si incorporated Q1 2026 Earnings Call Summary - Yahoo Finance

May 08, 2026

Quantum-Si outlines 2026 revenue of approximately $1M with Proteus launch targeted by end of 2026 - MSN

May 08, 2026

Quantum-Si Reports First Quarter 2026 Financial Results and Highlights Proteus™ Development Milestones - BioSpace

May 08, 2026

May 07, 2026

Quantum-Si Reports First Quarter 2026 Financial Results and Highlights Proteus Development Milestones - Investing News Network

May 07, 2026

Quantum Si incorporated : Quarterly Report for Quarter Ending March 31, 2026 (Form 10-Q) - marketscreener.com

May 07, 2026