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WLK
Westlake Corporation
stock NYSE

Market Open

Sep 22, 2026 10:04:54 AM EDT

69.51USD+2.568%(+1.74)90,095

65.72Bid 72.03Ask 6.31Spread

Pre-market

Sep 22, 2026 9:16:30 AM EDT

67.79USD+0.030%(+0.02)2,293

After-hours

Sep 21, 2026 4:10:30 PM EDT

67.77USD+0.007%(+0.01)0

OverviewOptionsHistoricalExchange VolumeShortsMore

WLK Volume Sep 22, 2026 9:44:59 AM EDT

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Exchange	Day%	Volume	30D%
Off Exchange¹	48.59	19,661	38.08
NYSE	12.71	5,143	33.02
IEX	8.90	3,602	6.54
Nasdaq GSM	6.71	2,716	9.89
NYSE Arca	6.59	2,667	2.81
Cboe BZX	4.73	1,912	4.51
MIAX Pearl	3.83	1,548	0.32
Cboe EDGX	3.29	1,331	1.98
Cboe EDGA	2.60	1,052	0.62
Cboe BYX	1.24	500	0.63
Nasdaq BX	0.35	142	0.31
MEMX	0.34	139	0.60
CHX	0.11	46	0.06
NYSE National	0.01	3	0.19
Texas Stock Exchange LLC	0.00	1	0.01
Nasdaq PHLX	0.00	0	0.17
NYSE American	0.00	0	0.15
LTSE	0.00	0	0.10
24X National	0.00	0	0.01

chartexchange.com

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

WLK Nutrition Facts

0.06 servings per container

Serving size

729.18K

Calories

40.46K

% Day

% Avg

Off Exchange¹ 20K

48.59%

38.08%

NYSE 5K

12.71%

33.02%

IEX 4K

8.90%

6.54%

Nasdaq GSM 3K

6.71%

9.89%

NYSE Arca 3K

6.59%

2.81%

Cboe BZX 2K

4.73%

4.51%

MIAX Pearl 2K

3.83%

0.32%

Cboe EDGX 1K

3.29%

1.98%

Cboe EDGA 1K

2.60%

0.62%

Cboe BYX 500

1.24%

0.63%

Nasdaq BX 142

0.35%

0.31%

MEMX 139

0.34%

0.60%

CHX 46

0.11%

0.06%

NYSE National 3

0.01%

0.19%

Texas Stock Exchange LLC 1

0.00%

0.01%

Nasdaq PHLX 0

0.00%

0.17%

NYSE American 0

0.00%

0.15%

LTSE 0

0.00%

0.10%

24X National 0

0.00%

0.01%

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

chartexchange.com

WLK Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 19,661, which is 48.59% of today's total volume.
Today's Lit volume is 20,802, which is 51.41%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 38.08%.
The average Lit volume has been 61.92%.

WLK Volume by Exchange

Off Exchange

NYSE

IEX

Nasdaq GSM

NYSE Arca

Cboe BZX

MIAX Pearl

Cboe EDGX

Cboe EDGA

Cboe BYX

Nasdaq BX