Dark

MRK
Merck & Co., Inc.
stock NYSE

At Close

Jul 22, 2026 3:59:56 PM EDT

127.51USD+0.990%(+1.25)5,172,047

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 4:00:30 PM EDT

127.52USD+0.008%(+0.01)1,641

OverviewOptionsHistoricalExchange VolumeShortsMore

MRK Volume Jul 22, 2026 3:45:03 PM EDT

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	51.89	2,280,631	41.52
Nasdaq GSM	12.78	561,721	9.21
NYSE	11.11	488,307	31.17
NYSE Arca	6.35	279,213	4.39
Cboe BZX	5.83	256,457	3.33
IEX	4.00	175,811	3.72
Cboe EDGX	3.36	147,627	1.76
Cboe EDGA	1.43	62,818	0.45
MEMX	1.27	55,973	0.80
Cboe BYX	0.69	30,487	0.25
Nasdaq BX	0.45	19,936	0.20
NYSE National	0.30	13,193	0.15
CHX	0.23	10,005	2.67
MIAX Pearl	0.18	7,734	0.16
NYSE American	0.07	3,025	0.11
Nasdaq PHLX	0.05	2,190	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

0.39 servings per container

Serving size

11.19M

Calories

4.40M

% Day

% Avg

Off Exchange¹ 2M

51.89%

41.52%

Nasdaq GSM 562K

12.78%

9.21%

NYSE 488K

11.11%

31.17%

NYSE Arca 279K

6.35%

4.39%

Cboe BZX 256K

5.83%

3.33%

IEX 176K

4.00%

3.72%

Cboe EDGX 148K

3.36%

1.76%

Cboe EDGA 63K

1.43%

0.45%

MEMX 56K

1.27%

0.80%

Cboe BYX 30K

0.69%

0.25%

Nasdaq BX 20K

0.45%

0.20%

NYSE National 13K

0.30%

0.15%

CHX 10K

0.23%

2.67%

MIAX Pearl 8K

0.18%

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 2,280,631, which is 51.89% of today's total volume.
Today's Lit volume is 2,114,872, which is 48.11%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 41.52%.
The average Lit volume has been 58.48%.

MRK Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE

NYSE Arca

Cboe BZX

IEX

Cboe EDGX

Cboe EDGA

MEMX

Cboe BYX

Nasdaq BX