Quantum-Si Inc (QSI)
Latest QSI Insider Trades
About Quantum-Si Inc (QSI)
Quantum-Si Inc is a life sciences company focused on proteomics research and analytical technologies. It develops single-molecule detection platforms designed to enable next-generation protein sequencing (NGPS) and large-scale protein analysis. Its technology supports massively parallel sequencing of proteins and can also be applied to the study of nucleic acids, providing tools for researchers and clinical applications in molecular analysis. The company's revenue is derived from sales of products and services.
- BRANFORD, CT
- 145
- 2021
- XNAS
90-Day SEC Filing Activity
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 8 | 76,665 | $71K |
QSI Insider Transactions (Form 4)
1637 Form 4 filings on record, the earliest from Dec 26, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| John S. Vieceli - Officer | Open-market sale | Class A Common Stock | 9,843 |
Recent QSI Form 8-K Filings
5Recent QSI Form 144 Notices of Proposed Sale
3A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| - | - | - | - | View on EDGAR | |
| - | - | - |
QSI Insider Trading - FAQ
What is the latest insider trade for QSI?
Quantum-Si Inc (QSI) had 4 insider filings in the last 90 days, with the most recent on 2026-06-25. The full record for QSI runs to 37 Form 4 filings, the earliest from 2024-12-26. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying QSI stock?
No insider purchases of QSI were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling QSI stock?
8 insider sales of QSI were filed in the last 90 days, totaling $71K.
Where can I see QSI SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page tracks QSI Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow QSI insider buys?
Create a free InsiderAlpha account and press Watch on this page to add QSI to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Information Technology Companies with Insider Activity
Recent Insider Filings
10Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
- - Christian Lapointe view on EDGAR
- - Jeffry R. Keyes view on EDGAR
- - John S. Vieceli view on EDGAR
- - Jeffrey Alan Hawkins view on EDGAR
- - Brigid Makes view on EDGAR
- - Ruth A. Fattori view on EDGAR
- - Amir Jafri view on EDGAR
- - Paula Dowdy view on EDGAR
- - John P. Kenny view on EDGAR
Related Companies - Recent Insider Activity
Learn More
- What is SEC Form 4?
- The filing insiders must submit within two business days of a trade, and how to read its transaction codes.
- Insider activity in Information Technology
- Where QSI's peers are being bought and sold.
- Every recent Form 4
- The full market-wide feed, updated as filings arrive from SEC EDGAR.
Track QSI insider activity as it files
Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
