After-hours trading runs 4:00 PM – 8:00 PM ET.
📅 QSI is expected to report earnings around Nov 4, 2026 after the close (estimated), with an estimated EPS of $-0.13. QSI earnings details →
Quantum-Si (QSI) has no recorded after-hours trades for the latest session. Its regular-session close was $0.74. After-hours quotes appear here when the stock trades between 4:00 PM and 8:00 PM ET.
After-hours trading in QSI on the NASDAQ runs from 4:00 PM to 8:00 PM ET on trading days, immediately after the regular session closes. Not every broker offers the full window, and liquidity thins sharply after about 6:30 PM ET.
QSI is expected to report earnings around Nov 4, 2026 after the close (estimated), with an estimated EPS of $-0.13. Earnings are the most common cause of a large after-hours move, since most companies report after the close.