[[ type === 'moc' ? 'MARKET ON CLOSE' : 'FREE WEBINAR' ]]
[[ timeLabel ]] WATCH LIVE:
Your browser of choice has not been tested for use with Barchart.com. If you have issues, please download one of the browsers listed here.
Investment Tools And Research To Help Make You A More Confident And Profitable Trader. FREE 30 Day Trial
Stocks | Futures | Watchlist | News | More
or
Faster, Cleaner, Better.

Quantum-Si Inc (QSI)

Quantum-Si Inc (QSI)
[[ item.lastPrice ]] [[ item.priceChange ]] ([[ item.percentChange ]]) [[ item.tradeTime ]] [NASDAQ]
[[ item.bidPrice ]] x [[ item.bidSize ]] [[ item.askPrice ]] x [[ item.askSize ]]
[[ session ]] by (Cboe BZX)
[[ item.lastPrice ]] [[ item.priceChange ]] ([[ item.percentChange ]]) [[ item.tradeTime ]] [NASDAQ]
[[ item.bidPrice ]] x [[ item.bidSize ]] [[ item.askPrice ]] x [[ item.askSize ]]
[[ session ]] [[ item.lastPriceExt ]] [[ item.priceChangeExt ]] ([[ item.percentChangeExt ]]) [[ item.tradeTimeExt ]]
News & Headlines for [[ item.sessionDateDisplayLong ]]
Quantum-Si to Report First Quarter 2026 Financial Results on May 7, 2026

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics technology company redefining protein analysis through single-molecule detection, today announced...

QSI : 0.9058 (-3.70%)
Quantum-Si Announces Two Customer Posters to be Presented at the American Association of Cancer Research Annual Meeting

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics company redefining protein analysis through single-molecule protein sequencing, today announced...

QSI : 0.9058 (-3.70%)
Quantum-Si Announces New Manuscript Demonstrating the Value of Single-molecule Protein Sequencing to Aid in Identifying New Cancer Treatment Strategies

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics company redefining protein analysis through single-molecule protein sequencing, today announced...

QSI : 0.9058 (-3.70%)
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics company redefining protein analysis through single-molecule protein sequencing, today announced...

QSI : 0.9058 (-3.70%)
Quantum-Si Announces First Customer Samples Tested on the Proteus™ Prototype System

Sequencing Results Utilizing a Proteus Prototype System Exceeds Platinum® Pro

QSI : 0.9058 (-3.70%)
Quantum-Si Announces the Start of the Proteus™ Roadshow

Multi-city Roadshow To Drive Awareness of Proteus and Develop Customer Funnel for Commercial Launch

QSI : 0.9058 (-3.70%)
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics technology company redefining protein analysis through single-molecule detection, today announced...

QSI : 0.9058 (-3.70%)
Quantum-Si Reports Fourth Quarter and Full Year 2025 Financial Results

Releases List Price of Proteus™ Platform Reiterates Proteus Development Program On Track for Year End 2026 Launch

QSI : 0.9058 (-3.70%)
Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics technology company redefining protein analysis through single-molecule detection, today announced...

QSI : 0.9058 (-3.70%)
Quantum-Si to Report Fourth Quarter and Full Year 2025 Financial Results on March 3, 2026

Quantum-Si Incorporated (Nasdaq: QSI) (“Quantum-Si,” “QSI” or the “Company”), a proteomics technology company redefining protein analysis through single-molecule detection, today announced...

QSI : 0.9058 (-3.70%)

Barchart Exclusives

3 Under-the-Radar Dividend Stocks Yielding Up to 13% That Wall Street Rates a Strong Buy
Three under-the-radar dividend stocks offer yields up to 13%, bullish analyst ratings, and possible upside for income investors seeking overlooked names. Read more
Want to use this as
your default charts setting?
Save this setup as a Chart Templates
Switch the Market flag
for targeted data from your country of choice.
Open the menu and switch the
Market flag for targeted data from your country of choice.
Want Streaming Chart Updates?
Switch your Site Preferences
to use Interactive Charts
Need More Chart Options?
Right-click on the chart to open the Interactive Chart menu.
Use your up/down arrows to move through the symbols.