
Quantum-Si (QSI) After-Hours
Date | After-hours Price | After-hours High | After-hours Low |
---|---|---|---|
Aug 2, 2025 | $1.45 | $1.48 | $1.45 |
Data last updated Aug 2, 2025 8:00 PM EST.
Quantum-Si (QSI) After-Hours Trading Summary
As of 8:00:00 PM EST on August 2, Quantum-Si (QSI) is trading at $1.45 in the after-hours session, down -$0.01 (-0.68%) from the regular market close of $1.46.
During after-hours trading, Quantum-Si (QSI) stock has ranged between $1.48 and $1.45, with the most recent trade recorded at $1.45.
How to Buy or Trade Quantum-Si (QSI) After Market Close
Looking to trade Quantum-Si stock (QSI) after the market closes? Public offers access to after-hours trading from 4:00 PM to 8:00 PM ET, giving investors the flexibility to place trades outside of regular market hours. Keep in mind that extended-hours trading may involve lower liquidity and wider bid-ask spreads than normal sessions. Follow the steps below to get started.
- 1
Create a Public brokerage account
Sign up for a free brokerage account with Public. You can open an account directly on the website or by downloading the Public app for iOS or Android.
- 2
Deposit funds into your account
Add funds to your Public account by linking a bank account, using a debit card, or initiating a wire transfer, so you’re ready to invest during extended hours.
- 3
Find Quantum-Si (QSI) stock and place your after-hours order
Go to the Explore tab and type “Quantum-Si” or “QSI” into the search bar. Select the stock from the results to view its quote page. From there, you can enter the amount you’d like to invest and place an after-hours order directly.
Quantum-Si (QSI) After-Hours Price History
Date | Market close price | After-hours price | Change |
---|---|---|---|
Aug 1, 2025 | $1.45 | $1.46 | +0.69% |
Jul 31, 2025 | $1.48 | $1.48 | 0.00% |
Jul 30, 2025 | $1.63 | $1.62 | -0.61% |
Jul 29, 2025 | $1.66 | $1.64 | -1.20% |
Jul 28, 2025 | $1.81 | $1.79 | -1.10% |