QSI
Quantum-Si-A (QSI)
NASDAQ
$0.84+$0.005 (+0.60%)
Price as of Aug 21, 2026 7:58 PM EDT
  • $166.1M
    Market Cap
  • -26.75%
    1-Year Change
  • Medical Devices
    Industry

Key Performance

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  • Earnings Score: N/A
  • Momentum Score: 20
  • True Yield: N/A
  • Financial Health Score: N/A
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Latest Research & News

Why Quantum-Si Stock Flopped on Friday

Quantum-Si filed a shelf registration with the SEC to potentially raise up to $300 million through various securities, causing investor concern about potential stock dilution and leading to a nearly 5% stock price decline.

10/10/2025, 4:35 PM • The Motley Fool

Russell 2000 Hits All-Time Highs: 8 Stocks Power Small-Cap Comeback

The Russell 2000 index reached an all-time high after the Federal Reserve signaled potential interest rate cuts, boosting small-cap stocks and providing cheaper borrowing opportunities for smaller companies.

09/18/2025, 3:08 PM • Benzinga

Peers

Statistics

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Day Range
$0.78
$0.93
$0.84
1-Year Range
$0.70
$2.63
$0.84
Latest Close$0.84
Change
+$0.05 (+6.59%)
Volume7,825,142
Market Cap$166.1M
Shares Outstanding198.9M
P/E (TTM)-1.82
Diluted EPS (TTM)-$0.46
Enterprise Value$142.5M

Information as of 08/21/2026

Company Profile

$166.1M
Market Cap
-$98.5M
Net Income
Sector: Healthcare
Industry: Medical Devices
29 Business Park Drive, Branford, CT, United States, 06405
866 688 7374

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-based solution that automates data analysis workflows and visualizes the sequencing results. The company was founded in 2013 and is headquartered in Branford, Connecticut.

Key Executives

  • Jeffrey Alan Hawkins
  • Jeffry R. Keyes
  • John S. Vieceli
  • Christian Lapointe
  • Jonathan Rothberg

Current Ownership Distribution

  • Institutions1.0B (72.33%)
  • Mutual Funds345.7M (24.19%)
  • Insiders49.7M (3.48%)
  • Other0 (0.00%)