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QSI
Quantum-Si Incorporated Class A Common Stock
stock NASDAQ

At Close

Sep 30, 2026 3:59:53 PM EDT

1.07USD+11.679%(+0.11)12,038,330

0.9300Bid 1.24Ask 0.31Spread

Pre-market

Sep 30, 2026 9:28:30 AM EDT

0.9677USD+1.002%(+0.0096)100,960

After-hours

Sep 30, 2026 4:59:30 PM EDT

1.12USD+4.673%(+0.05)336,815

OverviewOptionsHistoricalExchange VolumeShortsMore

QSI Volume Sep 30, 2026

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Exchange	Day%	Volume	30D%
Off Exchange¹	74.48	10,301,666	70.89
NYSE Arca	7.70	1,065,400	6.38
Nasdaq GSM	6.43	889,045	10.41
Cboe EDGX	5.78	800,097	2.23
Cboe BZX	2.35	325,591	1.80
MEMX	0.95	131,795	3.40
MIAX Pearl	0.43	59,371	0.74
NYSE	0.36	49,307	0.31
Cboe EDGA	0.28	38,201	1.85
Cboe BYX	0.26	36,435	0.32
IEX	0.22	30,651	0.85
Nasdaq BX	0.22	30,312	0.13
NYSE National	0.20	27,131	0.15
Texas Stock Exchange LLC	0.12	16,796	0.32
NYSE American	0.10	13,887	0.07
Nasdaq PHLX	0.09	12,884	0.10
24X National	0.01	1,710	0.01
CHX	0.00	501	0.02
LTSE	0.00	0	0.00

chartexchange.com

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

QSI Nutrition Facts

4.98 servings per container

Serving size

2.78M

Calories

13.83M

% Day

% Avg

Off Exchange¹ 10M

74.48%

70.89%

NYSE Arca 1M

7.70%

6.38%

Nasdaq GSM 889K

6.43%

10.41%

Cboe EDGX 800K

5.78%

2.23%

Cboe BZX 326K

2.35%

1.80%

MEMX 132K

0.95%

3.40%

MIAX Pearl 59K

0.43%

0.74%

NYSE 49K

0.36%

0.31%

Cboe EDGA 38K

0.28%

1.85%

Cboe BYX 36K

0.26%

0.32%

IEX 31K

0.22%

0.85%

Nasdaq BX 30K

0.22%

0.13%

NYSE National 27K

0.20%

0.15%

Texas Stock Exchange LLC 17K

0.12%

0.32%

NYSE American 14K

0.10%

0.07%

Nasdaq PHLX 13K

0.09%

0.10%

24X National 2K

0.01%

CHX 501

0.00%

0.02%

LTSE 0

0.00%

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

chartexchange.com

QSI Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 10,301,666, which is 74.48% of today's total volume.
Today's Lit volume is 3,529,114, which is 25.52%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 70.89%.
The average Lit volume has been 29.11%.

QSI Volume by Exchange

Off Exchange

NYSE Arca

Nasdaq GSM

Cboe EDGX

Cboe BZX

MEMX

MIAX Pearl

NYSE

Cboe EDGA

Cboe BYX

IEX