NASDAQ · QSI

Quantum-Si incorporated

Healthcare · Biotechnology

$1.28

Down-$0.06 (-4.69%)

Updated Oct 7, 2026, 12:42 AM

SID Score

5.8/10

Composite research score

Smart Money

—

Institutional and insider signal

Price performance · QSI

QSI price history

1M range · 20 trading sessions · Daily adjusted prices

Prices through Oct 5, 2026

Daily close

View OHLC price history

QSI OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
Oct 5, 2026	$1.525	$1.53	$1.2601	$1.28	19.18M
Oct 2, 2026	$1.385	$1.55	$1.17	$1.55	18.77M
Oct 1, 2026	$1.20	$1.48	$1.15	$1.43	33.06M
Sep 30, 2026	$0.96	$1.12	$0.96	$1.07	13.84M
Sep 29, 2026	$0.805	$1.03	$0.805	$0.9581	23.01M
Sep 28, 2026	$0.825	$0.8338	$0.795	$0.795	1.57M
Sep 25, 2026	$0.7943	$0.84	$0.7755	$0.8343	2.59M
Sep 24, 2026	$0.75	$0.7991	$0.7434	$0.785	1.59M
Sep 23, 2026	$0.79	$0.805	$0.7515	$0.7587	1.48M
Sep 22, 2026	$0.76	$0.792	$0.7511	$0.7847	2.43M
Sep 21, 2026	$0.7588	$0.7661	$0.75	$0.7559	1.13M
Sep 18, 2026	$0.79	$0.8015	$0.74	$0.7451	1.71M
Sep 17, 2026	$0.7495	$0.7963	$0.7495	$0.77	2.83M
Sep 16, 2026	$0.721	$0.7532	$0.721	$0.7301	915.22K
Sep 15, 2026	$0.72	$0.7409	$0.72	$0.72	1.17M
Sep 14, 2026	$0.7287	$0.7478	$0.7201	$0.725	1.39M
Sep 11, 2026	$0.7391	$0.755	$0.7391	$0.74	1.07M
Sep 10, 2026	$0.75	$0.755	$0.7251	$0.7391	1.72M
Sep 9, 2026	$0.7602	$0.7748	$0.746	$0.75	1.45M
Sep 8, 2026	$0.7672	$0.79	$0.76	$0.76	1.05M