What is QSI's market cap?

Quantum-Si incorporated (QSI) is a listed stock with a live quote. The latest market cap on this page is $223M.

Where is Quantum-Si incorporated headquartered?

Quantum-Si incorporated is headquartered in Guilford, CT.

How do I get QSI news from the API?

Call GET /v1/news?tickers=QSI. Add type=news, type=press_release, or type=legal to take one feed. Pro keys search articles since 2020 in real time. Free keys are delayed 15 minutes and return the last year. Signed-out visitors and Free accounts see that same year on this page. Pro sees articles since 2020.

How far back does QSI news go?

Signed-out visitors and Free accounts see the last year of stock news, press releases, and legal notices for QSI, 15 minutes behind, and each headline links to the publisher. Pro, including the 7-day trial, sees articles since 2020 as headlines are ingested. A Free API key returns the last year. Pro keys search articles since 2020.

Is the QSI price on this page from the API?

The price and daily change update during the US session for every visitor. That quote is context on this page. It is not part of the news API. The chart is one candle per session from the start of 2020. 1W, 1M, and 1Y group those sessions.

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QSI · NASDAQ

Quantum-Si incorporated

$1.12 -0.16 (-12.50%)

Company overview

Quantum-Si incorporated, a life sciences company, develops a single molecule detection platform for sample preparation and sequencing. Its proprietary platform is used in the semiconductor industry to advance proteomics and enable next generation protein sequencing. The company was incorporated in 2013 and is based in Guilford, Connecticut.

Sector: Healthcare
Industry: Biotechnology
Exchange: NASDAQ
Market cap: $223M
Employees: 149
Headquarters: Guilford, CT
Website: quantum-si.com
CEO: Jeffrey Alan Hawkins
Listed: November 13, 2020
P/E: -2.18
Dividend yield: 0.00%

Company financials

Revenue: $1.9M
Gross profit: $741,000
Operating income: -$96.3M
EBITDA: -$91.5M
Net income: -$104M
EPS: -$0.51
Total assets: $213M
Total debt: $3.7M
Gross margin: 40.01%
Net margin: -5,605.89%
Earnings yield: -45.91%

Revenue segmentation

By product (FY 2025)

By region (FY 2025)

Showing FY 2025

Price chart

QSI 1D NASDAQ O1.31H1.33L1.21C1.29-0.01 (-0.77%)Vol6.36M

News

Ticker	Type	Headline	Source	Published
QSIQuantum-Si incorporated	Stock news	Quantum-Si Q3 revenue falls on Proteus transition; lowers expense outlook	Reuters	Nov 5, 5:02:07 PM ET
QSIQuantum-Si incorporated	Stock news	BRIEF-Quantum-Si Q3 EPS USD -0.1	Reuters	Nov 5, 4:18:25 PM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si Reports Third Quarter 2026 Financial Results and Provides Business Update	GlobeNewswire	Nov 5, 4:06:16 PM ET
QSIQuantum-Si incorporated	Stock news	Head-To-Head Comparison: Quantum-Si (NASDAQ:QSI) vs. Quanterix (NASDAQ:QTRX)	Defense World	Nov 3, 2:59:10 AM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si to Provide a Business Update and Report Third Quarter 2026 Financial Results on November 5, 2026	GlobeNewswire	Oct 16, 8:00:00 AM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si Regains Compliance with Nasdaq Minimum Bid Price Requirement	GlobeNewswire	Oct 15, 9:00:00 AM ET
QSIQuantum-Si incorporated	Stock news	Beyond Elon Musk's Neuralink: Two Public Stocks With a Stake in the Brain Race	InvestorPlace	Oct 9, 5:00:00 PM ET
QSIQuantum-Si incorporated	Stock news	Head to Head Survey: Quantum-Si (NASDAQ:QSI) versus Twist Bioscience (NASDAQ:TWST)	Defense World	Oct 8, 4:15:18 AM ET
QSIQuantum-Si incorporated	Stock news	Nike Posts Mixed Q1 Results, Joins Mangoceuticals And Other Big Stocks Moving Lower In Friday's Pre-Market Session	Benzinga	Oct 2, 8:02:07 AM ET
QSIQuantum-Si incorporated	Stock news	3 Biotech Stocks Put Traders Are Targeting Today	Schaeffers Research	Oct 1, 11:44:35 AM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si Presents Interim Proteus™ Data at World HUPO	GlobeNewswire	Sep 28, 8:15:00 PM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si Announces Detection of 18 Amino Acids Using a	GlobeNewswire	Sep 15, 7:00:00 AM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si Expands Proteus™ Roadshow with Additional U.S. and European Cities	GlobeNewswire	Sep 9, 8:00:00 AM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si to Participate in the H.C. Wainwright 28th Annual Global Investment Conference	GlobeNewswire	Aug 18, 8:00:00 AM ET
QSIQuantum-Si incorporated	Stock news	Quantum-Si incorporated (QSI) Q2 2026 Earnings Call Transcript	Seeking Alpha	Aug 14, 12:17:07 AM ET
QSIQuantum-Si incorporated	Stock news	Quantum-Si Incorporated (QSI) Reports Q2 Loss, Tops Revenue Estimates	Zacks Investment Research	Aug 13, 7:51:24 PM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si to Report Second Quarter 2026 Financial Results on August 13, 2026	GlobeNewswire	Jul 27, 4:05:00 PM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)	Business Wire	Jun 16, 4:05:00 PM ET
QSIQuantum-Si incorporated	Press release	Quantum-Si and Cell Signaling Technology Partner to Advance Post-Translational Modification Analysis on Proteus™	Business Wire	Jun 10, 8:00:00 AM ET
QSIQuantum-Si incorporated	Stock news	Quantum-Si Announces the Expansion of the Proteus™ Roadshow	GuruFocus	Jun 3, 9:00:00 AM ET

Real-time stock news for $15 a month.

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