Dark

MKSI
MKS Inc. Common Stock
stock NASDAQ

Market Open

Aug 7, 2026 10:28:23 AM EDT

308.40USD+5.807%(+16.92)331,491

291.30Bid 319.69Ask 28.39Spread

Pre-market

Aug 6, 2026 9:28:30 AM EDT

290.51USD-7.215%(-22.59)0

After-hours

Aug 6, 2026 4:19:30 PM EDT

291.67USD+0.063%(+0.19)0

OverviewOptionsHistoricalExchange VolumeShortsMore

MKSI Volume Dec 31, 1969

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	45.72	1,298,658	48.33
Nasdaq GSM	29.68	842,836	26.74
IEX	10.35	293,831	7.20
NYSE Arca	5.66	160,724	7.32
Cboe BZX	3.64	103,450	3.20
Cboe EDGX	1.45	41,075	1.88
NYSE	0.82	23,277	1.19
MEMX	0.80	22,616	0.89
Cboe BYX	0.68	19,320	1.03
Cboe EDGA	0.32	9,192	0.44
Nasdaq PHLX	0.21	5,956	0.10
MIAX Pearl	0.19	5,519	0.22
NYSE National	0.19	5,427	0.41
NYSE American	0.13	3,695	0.15
Nasdaq BX	0.12	3,536	0.54
CHX	0.02	701	0.33
Texas Stock Exchange LLC	0.01	253	0.00
24X National	0.00	100	0.04
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.

MKSI Nutrition Facts

1.74 servings per container

Serving size

1.63M

Calories

2.84M

% Day

% Avg

Off Exchange¹ 1M

45.72%

48.33%

Nasdaq GSM 843K

29.68%

26.74%

IEX 294K

10.35%

7.20%

NYSE Arca 161K

5.66%

7.32%

Cboe BZX 103K

3.64%

3.20%

Cboe EDGX 41K

1.45%

1.88%

NYSE 23K

0.82%

1.19%

MEMX 23K

0.80%

0.89%

Cboe BYX 19K

0.68%

1.03%

Cboe EDGA 9K

0.32%

0.44%

Nasdaq PHLX 6K

0.21%

0.10%

MIAX Pearl 6K

0.19%

0.22%

NYSE National 5K

0.19%

0.41%

NYSE American 4K

0.13%

0.15%

Nasdaq BX 4K

0.12%

0.54%

CHX 701

0.02%

0.33%

Texas Stock Exchange LLC 253

0.01%

0.00%

24X National 100

0.00%

0.04%

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

MKSI Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 1,298,658, which is 45.72% of today's total volume.
Today's Lit volume is 1,541,508, which is 54.28%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 48.33%.
The average Lit volume has been 51.67%.

MKSI Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE

MEMX

Cboe BYX

Cboe EDGA

Nasdaq PHLX