Dark

MRK
Merck & Co., Inc.
stock NYSE

At Close

Jul 22, 2026 3:59:56 PM EDT

127.51USD+0.990%(+1.25)7,785,119

120.28Bid 134.40Ask 14.12Spread

Pre-market

Jul 22, 2026 9:27:30 AM EDT

127.06USD+0.634%(+0.80)3,101

After-hours

Jul 22, 2026 4:10:30 PM EDT

127.47USD-0.031%(-0.04)1,889,522

OverviewOptionsHistoricalExchange VolumeShortsMore

MRK Volume Jul 22, 2026 3:55:03 PM EDT

[ < ]

Exchange	Day%	Volume	30D%
Off Exchange¹	50.80	2,374,762	41.51
Nasdaq GSM	13.60	635,727	9.22
NYSE	11.02	515,303	31.15
NYSE Arca	6.71	313,467	4.39
Cboe BZX	6.03	281,929	3.33
IEX	4.08	190,828	3.72
Cboe EDGX	3.29	153,580	1.76
Cboe EDGA	1.36	63,800	0.45
MEMX	1.21	56,632	0.80
Cboe BYX	0.67	31,501	0.25
Nasdaq BX	0.43	20,078	0.20
NYSE National	0.29	13,463	0.15
CHX	0.22	10,131	2.67
MIAX Pearl	0.17	7,796	0.16
NYSE American	0.07	3,154	0.11
Nasdaq PHLX	0.05	2,379	0.09
24X National	0.01	375	0.01
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.

MRK Nutrition Facts

0.42 servings per container

Serving size

11.19M

Calories

4.67M

% Day

% Avg

Off Exchange¹ 2M

50.80%

41.51%

Nasdaq GSM 636K

13.60%

9.22%

NYSE 515K

11.02%

31.15%

NYSE Arca 313K

6.71%

4.39%

Cboe BZX 282K

6.03%

3.33%

IEX 191K

4.08%

3.72%

Cboe EDGX 154K

3.29%

1.76%

Cboe EDGA 64K

1.36%

0.45%

MEMX 57K

1.21%

0.80%

Cboe BYX 32K

0.67%

0.25%

Nasdaq BX 20K

0.43%

0.20%

NYSE National 13K

0.29%

0.15%

CHX 10K

0.22%

2.67%

MIAX Pearl 8K

0.17%

0.16%

NYSE American 3K

0.07%

0.11%

Nasdaq PHLX 2K

0.05%

0.09%

24X National 375

0.01%

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

MRK Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 2,374,762, which is 50.80% of today's total volume.
Today's Lit volume is 2,300,143, which is 49.20%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 41.51%.
The average Lit volume has been 58.49%.

MRK Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE

NYSE Arca

Cboe BZX

IEX

Cboe EDGX

Cboe EDGA

MEMX

Cboe BYX

Nasdaq BX