Dark

DGX
Quest Diagnostics Inc.
stock NYSE

At Close

Sep 30, 2026 3:59:56 PM EDT

233.11USD+0.491%(+1.14)1,080,377

218.16Bid 250.43Ask 32.27Spread

Pre-market

Sep 28, 2026 9:24:30 AM EDT

236.32USD+1.875%(+4.35)0

After-hours

Sep 30, 2026 4:33:30 PM EDT

233.07USD-0.017%(-0.04)285,429

OverviewOptionsHistoricalExchange VolumeShortsMore

DGX Volume Sep 30, 2026

[ < ]

Exchange	Day%	Volume	30D%
Off Exchange¹	44.52	480,819	44.19
NYSE	34.06	367,835	30.82
Nasdaq GSM	6.63	71,657	7.35
IEX	5.54	59,820	5.75
Cboe BZX	2.65	28,615	3.57
NYSE Arca	2.30	24,789	3.10
Cboe EDGX	1.37	14,775	1.85
Cboe EDGA	0.51	5,520	0.45
Cboe BYX	0.50	5,403	0.73
Nasdaq BX	0.48	5,215	0.48
MEMX	0.42	4,582	0.53
NYSE American	0.32	3,420	0.21
NYSE National	0.24	2,645	0.43
MIAX Pearl	0.18	1,980	0.21
CHX	0.17	1,815	0.10
Nasdaq PHLX	0.11	1,162	0.18
Texas Stock Exchange LLC	0.00	1	0.06
LTSE	0.00	0	0.00
24X National	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.

DGX Nutrition Facts

1.02 servings per container

Serving size

1.06M

Calories

1.08M

% Day

% Avg

Off Exchange¹ 481K

44.52%

44.19%

NYSE 368K

34.06%

30.82%

Nasdaq GSM 72K

6.63%

7.35%

IEX 60K

5.54%

5.75%

Cboe BZX 29K

2.65%

3.57%

NYSE Arca 25K

2.30%

3.10%

Cboe EDGX 15K

1.37%

1.85%

Cboe EDGA 6K

0.51%

0.45%

Cboe BYX 5K

0.50%

0.73%

Nasdaq BX 5K

0.48%

MEMX 5K

0.42%

0.53%

NYSE American 3K

0.32%

0.21%

NYSE National 3K

0.24%

0.43%

MIAX Pearl 2K

0.18%

0.21%

CHX 2K

0.17%

0.10%

Nasdaq PHLX 1K

0.11%

0.18%

Texas Stock Exchange LLC 1

0.00%

0.06%

LTSE 0

0.00%

24X National 0

0.00%

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

chartexchange.com

DGX Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 480,819, which is 44.52% of today's total volume.
Today's Lit volume is 599,234, which is 55.48%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 44.19%.
The average Lit volume has been 55.81%.

DGX Volume by Exchange

Off Exchange

NYSE

Nasdaq GSM

IEX

Cboe BZX

NYSE Arca

Cboe EDGX

Cboe EDGA

Cboe BYX

Nasdaq BX

MEMX