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QSI
Quantum-Si Incorporated Class A Common Stock
stock NASDAQ

At Close

Sep 29, 2026 3:59:48 PM EDT

0.9600USD+20.792%(+0.1650)22,869,241

0.00Bid 0.00Ask 0.0000Spread

Pre-market

Sep 29, 2026 9:17:30 AM EDT

0.8154USD+2.566%(+0.0204)4,184

After-hours

Sep 29, 2026 4:59:30 PM EDT

0.9556USD-0.489%(-0.0047)64,631

OverviewOptionsHistoricalExchange VolumeShortsMore

QSI Volume Sep 29, 2026

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Exchange	Day%	Volume	30D%
Off Exchange¹	79.99	18,403,241	70.22
NYSE Arca	5.93	1,364,001	6.11
Nasdaq GSM	4.50	1,034,460	11.20
MEMX	3.42	787,881	3.79
Cboe EDGA	2.14	491,984	2.11
Cboe EDGX	1.59	366,546	1.69
Cboe BZX	0.81	185,700	1.69
MIAX Pearl	0.56	129,169	0.79
IEX	0.25	57,739	0.96
Cboe BYX	0.19	43,777	0.32
NYSE	0.13	30,797	0.31
Texas Stock Exchange LLC	0.12	27,365	0.35
Nasdaq BX	0.11	25,916	0.12
NYSE National	0.09	20,652	0.14
NYSE American	0.09	19,846	0.07
Nasdaq PHLX	0.06	14,533	0.10
24X National	0.01	2,151	0.01
CHX	0.00	722	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

10.99 servings per container

Serving size

2.09M

Calories

23.01M

% Day

% Avg

Off Exchange¹ 18M

79.99%

70.22%

NYSE Arca 1M

5.93%

6.11%

Nasdaq GSM 1M

4.50%

11.20%

MEMX 788K

3.42%

3.79%

Cboe EDGA 492K

2.14%

2.11%

Cboe EDGX 367K

1.59%

1.69%

Cboe BZX 186K

0.81%

1.69%

MIAX Pearl 129K

0.56%

0.79%

IEX 58K

0.25%

0.96%

Cboe BYX 44K

0.19%

0.32%

NYSE 31K

0.13%

0.31%

Texas Stock Exchange LLC 27K

0.12%

0.35%

Nasdaq BX 26K

0.11%

0.12%

NYSE National 21K

0.09%

0.14%

NYSE American 20K

0.09%

0.07%

Nasdaq PHLX 15K

0.06%

0.10%

24X National 2K

0.01%

CHX 722

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 18,403,241, which is 79.99% of today's total volume.
Today's Lit volume is 4,603,239, which is 20.01%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 70.22%.
The average Lit volume has been 29.78%.

QSI Volume by Exchange

Off Exchange

NYSE Arca

Nasdaq GSM

MEMX

Cboe EDGA

Cboe EDGX

Cboe BZX

MIAX Pearl

IEX

Cboe BYX

NYSE