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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

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	77.17	9,097,124	71.15
Nasdaq GSM	6.30	742,692	10.48
NYSE Arca	5.38	634,265	6.06
Cboe EDGX	5.36	632,018	2.10
Cboe BZX	2.43	286,680	1.80
MEMX	0.88	104,277	3.45
MIAX Pearl	0.46	54,720	0.75
NYSE	0.42	49,307	0.32
Cboe BYX	0.31	36,335	0.32
IEX	0.26	30,451	0.87
Nasdaq BX	0.26	30,312	0.13
NYSE National	0.22	26,130	0.15
Cboe EDGA	0.20	23,572	1.88
Texas Stock Exchange LLC	0.14	16,796	0.33
Nasdaq PHLX	0.11	12,884	0.10
NYSE American	0.07	8,587	0.07
24X National	0.01	1,010	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

4.24 servings per container

Serving size

2.78M

Calories

11.79M

% Day

% Avg

Off Exchange¹ 9M

77.17%

71.15%

Nasdaq GSM 743K

6.30%

10.48%

NYSE Arca 634K

5.38%

6.06%

Cboe EDGX 632K

5.36%

2.10%

Cboe BZX 287K

2.43%

1.80%

MEMX 104K

0.88%

3.45%

MIAX Pearl 55K

0.46%

0.75%

NYSE 49K

0.42%

0.32%

Cboe BYX 36K

0.31%

0.32%

IEX 30K

0.26%

0.87%

Nasdaq BX 30K

0.26%

0.13%

NYSE National 26K

0.22%

0.15%

Cboe EDGA 24K

0.20%

1.88%

Texas Stock Exchange LLC 17K

0.14%

0.33%

Nasdaq PHLX 13K

0.11%

0.10%

NYSE American 9K

0.07%

24X National 1K

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 9,097,124, which is 77.17% of today's total volume.
Today's Lit volume is 2,690,537, which is 22.83%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 71.15%.
The average Lit volume has been 28.85%.

QSI Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe EDGX

Cboe BZX

MEMX

MIAX Pearl

NYSE

Cboe BYX

IEX

Nasdaq BX