Dark

MRK
Merck & Co., Inc.
stock NYSE

At Close

Oct 13, 2025 3:59:56 PM EDT

85.64USD-0.453%(-0.39)6,524,767

0.00Bid 0.00Ask 0.00Spread

Pre-market

Oct 13, 2025 9:26:30 AM EDT

85.79USD-0.279%(-0.24)13,816

After-hours

Oct 13, 2025 4:57:30 PM EDT

85.73USD+0.105%(+0.09)80,749

OverviewOptionsHistoricalExchange VolumeShortsMore

MRK Volume Oct 13, 2025

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	38.08	2,495,281	42.44
NYSE	31.51	2,065,193	26.20
Nasdaq GSM	11.89	779,439	12.16
NYSE Arca	5.16	337,829	4.94
IEX	4.48	293,808	4.17
Cboe BZX	3.24	212,020	4.15
Cboe EDGX	1.98	129,725	2.16
CHX	1.03	67,616	1.38
MEMX	0.94	61,769	0.91
Cboe BYX	0.67	43,631	0.30
MIAX Pearl	0.29	18,942	0.28
Cboe EDGA	0.27	17,980	0.38
Nasdaq BX	0.17	10,911	0.18
Nasdaq PHLX	0.12	7,619	0.14
NYSE National	0.10	6,420	0.12
NYSE American	0.08	5,020	0.09
LTSE	0.00	210	0.00

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¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

MRK Nutrition Facts

0.49 servings per container

Serving size

13.27M

Calories

6.55M

% Day

% Avg

Off Exchange¹ 2M

38.08%

42.44%

NYSE 2M

31.51%

26.20%

Nasdaq GSM 779K

11.89%

12.16%

NYSE Arca 338K

5.16%

4.94%

IEX 294K

4.48%

4.17%

Cboe BZX 212K

3.24%

4.15%

Cboe EDGX 130K

1.98%

2.16%

CHX 68K

1.03%

1.38%

MEMX 62K

0.94%

0.91%

Cboe BYX 44K

0.67%

0.30%

MIAX Pearl 19K

0.29%

0.28%

Cboe EDGA 18K

0.27%

0.38%

Nasdaq BX 11K

0.17%

0.18%

Nasdaq PHLX 8K

0.12%

0.14%

NYSE National 6K

0.10%

0.12%

NYSE American 5K

0.08%

0.09%

LTSE 210

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 2,495,281, which is 38.08% of today's total volume.
Today's Lit volume is 4,058,132, which is 61.92%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 42.44%.
The average Lit volume has been 57.56%.

MRK Volume by Exchange

Off Exchange

NYSE

Nasdaq GSM

NYSE Arca

IEX

Cboe BZX

Cboe EDGX

CHX

MEMX

Cboe BYX

MIAX Pearl