Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
0.912
+0.012 (1.30%)
At close: Apr 28, 2026, 4:00 PM EDT
0.933
+0.021 (2.25%)
Pre-market: Apr 29, 2026, 6:14 AM EDT
Company Description
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.
Quantum-Si incorporated
| Country | United States |
| Founded | 2013 |
| Industry | Medical Devices |
| Sector | Healthcare |
| Employees | 145 |
| CEO | Jeffrey Hawkins |
Contact Details
Address: 29 Business Park Drive Branford, Connecticut 06405 United States | |
| Phone | 866 688 7374 |
| Website | quantum-si.com |
Stock Details
| Ticker Symbol | QSI |
| Exchange | NASDAQ |
| Stock Type | Common Stock |
| Share Class | Class A Shares |
| Fiscal Year | January - December |
| Reporting Currency | USD |
| CIK Code | 0001816431 |
| CUSIP Number | 74765K105 |
| ISIN Number | US74765K1051 |
| Employer ID | 85-1388175 |
| SIC Code | 3829 |
Key Executives
| Name | Position |
|---|---|
| Jeffrey Alan Hawkins | President, Chief Executive Officer and Director |
| Dr. Jonathan M. Rothberg Ph.D. | Founder and Executive Director |
| Jeffry R. Keyes CPA | Chief Financial Officer and Treasurer |
| Dr. John S. Vieceli Ph.D. | Chief Product Officer |
| Todd Rearick | Chief Technology Officer |
| Dr. Christian Lapointe J.D., Ph.D. | General Counsel and Corporate Secretary |
| Lindsay Thompson | Chief Human Resources Officer |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Apr 22, 2026 | 144 | Filing |
| Apr 22, 2026 | 144 | Filing |
| Apr 1, 2026 | ARS | Filing |
| Apr 1, 2026 | DEFA14A | Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| Apr 1, 2026 | DEF 14A | Other definitive proxy statements |
| Mar 24, 2026 | 144 | Filing |
| Mar 24, 2026 | 144 | Filing |
| Mar 24, 2026 | 144 | Filing |
| Mar 24, 2026 | 144 | Filing |
| Mar 3, 2026 | S-8 | Securities to be offered to employees in employee benefit plans |