Quantum-Si incorporated (QSI)

NASDAQ: QSI · Real-Time Price · USD
0.8610
+0.0071 (0.83%)
At close: May 19, 2026, 4:00 PM EDT
0.8593
-0.0017 (-0.20%)
After-hours: May 19, 2026, 7:57 PM EDT
Market Cap187.49M -18.8%
Revenue (ttm)1.85M -46.2%
Net Income-103.82M
EPS-0.50
Shares Out 217.76M
PE Ration/a
Forward PEn/a
Dividendn/a
Ex-Dividend Daten/a
Volume2,898,935
Open0.8500
Previous Close0.8539
Day's Range0.8210 - 0.8665
52-Week Range0.6912 - 3.1000
Beta3.16
AnalystsBuy
Price Target2.50 (+190.36%)
Earnings DateMay 7, 2026

About QSI

Quantum-Si incorporated, a life sciences company, develops proprietary, universal, and single-molecule detection platform applied to proteomics to enable next-gen protein sequencing (NGPS). The company offers Platinum and Platinum Pro NGPS instruments for single-molecule, amino acid level resolution, and automated data analysis; library preparation kits to prepare a customer’s protein sample for sequencing; and sequencing kits, which contain the reagents and consumables used to perform NGPS. It also provides Platinum analysis software, a cloud-... [Read more]

Sector Healthcare
Founded 2013
Employees 145
Stock Exchange NASDAQ
Ticker Symbol QSI
Full Company Profile

Financial Performance

In 2025, Quantum-Si incorporated's revenue was $2.44 million, a decrease of -20.34% compared to the previous year's $3.06 million. Losses were -$101.34 million, 0.33% more than in 2024.

Financial Statements

Analyst Summary

According to 3 analysts, the average rating for QSI stock is "Buy." The 12-month stock price target is $2.5, which is an increase of 190.36% from the latest price.

Price Target
$2.5
(190.36% upside)
Analyst Consensus: Buy
Stock Forecasts

News

Quantum-Si incorporated Transcript: H.C. Wainwright 4th Annual BioConnect Investor Conference

Proteus, a next-generation protein sequencing platform, is set for late 2024 launch with a scalable roadmap, enhanced PTM detection, and a $425,000 price point. Ongoing upgrades will be delivered via software and consumables, supported by strong cash reserves and a global commercialization strategy.

5 hours ago - Transcripts

Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4).

6 days ago - Business Wire

Quantum-Si incorporated Earnings Call Transcript: Q1 2026

Q1 2026 saw modest revenue and disciplined spending as focus shifted to the Proteus platform, which achieved key development milestones and strong early customer interest. Cash reserves remain robust, supporting operations into 2028, with commercial launch of Proteus on track for year-end.

12 days ago - Transcripts

Quantum-Si incorporated Earnings release: Q1 2026

Quantum-Si incorporated released its Q1 2026 earnings on May 7, 2026, summarizing the period's financial results.

12 days ago - Filings

Quantum-Si incorporated Quarterly report: Q1 2026

Quantum-Si incorporated has published its Q1 2026 quarterly earnings report on May 7, 2026.

12 days ago - Filings

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

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Reports First Quarter 2026 Financial Results and Highlights Proteus™ Development Milestones.

12 days ago - Business Wire

Quantum-Si to Participate in the H.C. Wainwright 4th Annual BioConnect Investor Conference at NASDAQ

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si to Participate in the H.C. Wainwright 4th Annual BioConnect Investor Conference.

18 days ago - Business Wire

Quantum-Si announces sequencing on Integrated Proteus instruments

Quantum-Si (QSI) Incorporated demonstrated sequencing on integrated Proteus instruments. The company said, “This milestone was achieved using a developmental sequencing kit, the KinetIQ Array, and ful...

21 days ago - TheFly

Quantum-Si Announces Successful Sequencing on Integrated Proteus™ Instruments

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Announces Successful Sequencing on Integrated Proteus™ Instruments.

21 days ago - Business Wire

Quantum-Si to Report First Quarter 2026 Financial Results on May 7, 2026

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si to Report First Quarter 2026 Financial Results on May 7, 2026.

4 weeks ago - Business Wire

Quantum-Si announces two customer posters to be presented at AACR meeting

Quantum-Si (QSI) announced that there will be two customer posters presented at the American Association of Cancer Research annual meeting on April 17-22, 2026 in San Diego, California. Poster Title:…

4 weeks ago - TheFly

Quantum-Si Announces Two Customer Posters to be Presented at the American Association of Cancer Research Annual Meeting

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Announces Two Customer Posters to be Presented at the American Association of Cancer Research Annual Meeting.

4 weeks ago - Business Wire

Quantum-Si announces new manuscript on bioRxiv

Quantum-Si (QSI) Incorporated announced a new manuscript available via pre-print on bioRxiv from researchers out of the University of British Columbia and the B.C. Cancer Research Institute. In the pr...

5 weeks ago - TheFly

Quantum-Si Announces New Manuscript Demonstrating the Value of Single-molecule Protein Sequencing to Aid in Identifying New Cancer Treatment Strategies

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Announces New Manuscript Demonstrating Value of Single-molecule Protein Sequencing to Aid in Identifying New Cancer Treatment Strategies.

5 weeks ago - Business Wire

Quantum-Si announces customer samples tested on Proteus prototype system

Quantum-Si (QSI) has completed the sequencing of multiple samples provided by an existing Platinum Pro customer on a Proteus prototype system. The testing included sequencing the samples on both Plati...

5 weeks ago - TheFly

Quantum-Si announces customer samples tested on Proteus prototype system

Quantum-Si (QSI) has completed the sequencing of multiple samples provided by an existing Platinum Pro customer on a Proteus prototype system. The testing included sequencing the samples on both Plati...

5 weeks ago - TheFly

Quantum-Si Announces First Customer Samples Tested on the Proteus™ Prototype System

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Announces First Customer Samples Tested on the Proteus™ Prototype System.

5 weeks ago - Business Wire

Quantum-Si Announces the Start of the Proteus™ Roadshow

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Announces the Start of the Proteus™ Roadshow.

6 weeks ago - Business Wire

Quantum-Si incorporated Proxy statement: Proxy filing

Quantum-Si incorporated filed a proxy statement on April 1, 2026, providing details for shareholder voting and corporate governance matters.

6 weeks ago - Filings

Quantum-Si incorporated Proxy statement: Proxy filing

Quantum-Si incorporated filed a proxy statement on April 1, 2026, providing details for shareholder voting and corporate governance matters.

6 weeks ago - Filings

Quantum-Si price target lowered to $1 from $1.50 at Canaccord

Canaccord analyst Kyle Mikson lowered the firm’s price target on Quantum-Si (QSI) to $1 from $1.50 and keeps a Hold rating on the shares. The firm said 4Q25 results below…

2 months ago - TheFly

Quantum-Si incorporated Earnings Call Transcript: Q4 2025

2026 will be a transition year with revenue mainly from consumables, limited new instrument sales, and a focus on preparing for the Proteus launch. Financial discipline is maintained, with strong cash reserves and lower gross margins expected due to revenue mix.

2 months ago - Transcripts

Quantum-Si incorporated Annual report: Q4 2025

Quantum-Si incorporated has published its Q4 2025 annual report on March 3, 2026.

2 months ago - Filings

Quantum-Si incorporated Earnings release: Q4 2025

Quantum-Si incorporated released its Q4 2025 earnings on March 3, 2026, summarizing the period's financial results.

2 months ago - Filings

Quantum-Si Reports Fourth Quarter and Full Year 2025 Financial Results

BRANFORD, Conn.--(BUSINESS WIRE)--Quantum-Si Reports Fourth Quarter and Full Year 2025 Financial Results.

2 months ago - Business Wire