Dark

MKSI
MKS Inc. Common Stock
stock NASDAQ

Market Open

Aug 7, 2026 11:24:31 AM EDT

307.99USD+5.664%(+16.51)442,927

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 Aug 7, 2026 11:05:02 AM EDT

[ < ]

Exchange	Day%	Volume	30D%
Off Exchange¹	48.25	22,780	47.65
Nasdaq GSM	16.73	7,897	27.10
IEX	9.66	4,560	7.24
NYSE Arca	7.84	3,702	7.45
Cboe BZX	4.25	2,007	3.22
Cboe EDGX	3.64	1,719	1.92
NYSE	3.54	1,671	1.20
MEMX	2.32	1,095	0.91
Cboe BYX	1.15	545	1.05
Nasdaq BX	0.81	383	0.54
MIAX Pearl	0.69	328	0.23
Texas Stock Exchange LLC	0.41	194	0.00
NYSE National	0.29	138	0.41
Cboe EDGA	0.25	119	0.45
CHX	0.12	55	0.34
Nasdaq PHLX	0.05	23	0.10
NYSE American	0.00	0	0.15
24X National	0.00	0	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

0.03 servings per container

Serving size

1.63M

Calories

47.22K

% Day

% Avg

Off Exchange¹ 23K

48.25%

47.65%

Nasdaq GSM 8K

16.73%

27.10%

IEX 5K

9.66%

7.24%

NYSE Arca 4K

7.84%

7.45%

Cboe BZX 2K

4.25%

3.22%

Cboe EDGX 2K

3.64%

1.92%

NYSE 2K

3.54%

1.20%

MEMX 1K

2.32%

0.91%

Cboe BYX 545

1.15%

1.05%

Nasdaq BX 383

0.81%

0.54%

MIAX Pearl 328

0.69%

0.23%

Texas Stock Exchange LLC 194

0.41%

0.00%

NYSE National 138

0.29%

0.41%

Cboe EDGA 119

0.25%

0.45%

CHX 55

0.12%

0.34%

Nasdaq PHLX 23

0.05%

0.10%

NYSE American 0

0.00%

0.15%

24X National 0

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 22,780, which is 48.25% of today's total volume.
Today's Lit volume is 24,436, which is 51.75%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 47.65%.
The average Lit volume has been 52.35%.

MKSI Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE

MEMX

Cboe BYX

Nasdaq BX

MIAX Pearl